diff options
| -rw-r--r-- | AUTHORS | 7 | ||||
| -rw-r--r-- | COPYING | 338 | ||||
| -rw-r--r-- | ChangeLog | 140 | ||||
| -rw-r--r-- | INSTALL | 80 | ||||
| -rw-r--r-- | Makefile.in | 138 | ||||
| -rw-r--r-- | NEWS | 24 | ||||
| -rw-r--r-- | README | 110 | ||||
| -rw-r--r-- | carg_parser.c | 319 | ||||
| -rw-r--r-- | carg_parser.h | 97 | ||||
| -rwxr-xr-x | configure | 198 | ||||
| -rw-r--r-- | decoder.c | 309 | ||||
| -rw-r--r-- | decoder.h | 397 | ||||
| -rw-r--r-- | doc/lunzip.1 | 115 | ||||
| -rw-r--r-- | list.c | 112 | ||||
| -rw-r--r-- | lzip.h | 289 | ||||
| -rw-r--r-- | lzip_index.c | 289 | ||||
| -rw-r--r-- | lzip_index.h | 91 | ||||
| -rw-r--r-- | main.c | 996 | ||||
| -rwxr-xr-x | testsuite/check.sh | 377 | ||||
| -rw-r--r-- | testsuite/fox.lz | bin | 0 -> 80 bytes | |||
| -rw-r--r-- | testsuite/fox6.lz | bin | 0 -> 480 bytes | |||
| -rw-r--r-- | testsuite/fox6_mark.lz | bin | 0 -> 480 bytes | |||
| -rw-r--r-- | testsuite/fox_bcrc.lz | bin | 0 -> 80 bytes | |||
| -rw-r--r-- | testsuite/fox_crc0.lz | bin | 0 -> 80 bytes | |||
| -rw-r--r-- | testsuite/fox_das46.lz | bin | 0 -> 80 bytes | |||
| -rw-r--r-- | testsuite/fox_de20.lz | bin | 0 -> 80 bytes | |||
| -rw-r--r-- | testsuite/fox_mes81.lz | bin | 0 -> 80 bytes | |||
| -rw-r--r-- | testsuite/fox_s11.lz | bin | 0 -> 80 bytes | |||
| -rw-r--r-- | testsuite/fox_v2.lz | bin | 0 -> 80 bytes | |||
| -rw-r--r-- | testsuite/test.txt | 676 | ||||
| -rw-r--r-- | testsuite/test.txt.lz | bin | 0 -> 7376 bytes | |||
| -rw-r--r-- | testsuite/test_em.txt.lz | bin | 0 -> 14024 bytes |
32 files changed, 5102 insertions, 0 deletions
@@ -0,0 +1,7 @@ +Lunzip was written by Antonio Diaz Diaz. + +The ideas embodied in lunzip are due to (at least) the following people: +Abraham Lempel and Jacob Ziv (for the LZ algorithm), Andrei Markov (for the +definition of Markov chains), G.N.N. Martin (for the definition of range +encoding), Igor Pavlov (for putting all the above together in LZMA), and +Julian Seward (for bzip2's CLI). @@ -0,0 +1,338 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Lesser General Public License instead.) You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +this service if you wish), that you receive source code or can get it +if you want it, that you can change the software or use pieces of it +in new free programs; and that you know you can do these things. + + To protect your rights, we need to make restrictions that forbid +anyone to deny you these rights or to ask you to surrender the rights. +These restrictions translate to certain responsibilities for you if you +distribute copies of the software, or if you modify it. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must give the recipients all the rights that +you have. You must make sure that they, too, receive or can get the +source code. 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To prevent this, we have made it clear that any +patent must be licensed for everyone's free use or not licensed at all. + + The precise terms and conditions for copying, distribution and +modification follow. + + GNU GENERAL PUBLIC LICENSE + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION + + 0. This License applies to any program or other work which contains +a notice placed by the copyright holder saying it may be distributed +under the terms of this General Public License. The "Program", below, +refers to any such program or work, and a "work based on the Program" +means either the Program or any derivative work under copyright law: +that is to say, a work containing the Program or a portion of it, +either verbatim or with modifications and/or translated into another +language. (Hereinafter, translation is included without limitation in +the term "modification".) Each licensee is addressed as "you". + +Activities other than copying, distribution and modification are not +covered by this License; they are outside its scope. The act of +running the Program is not restricted, and the output from the Program +is covered only if its contents constitute a work based on the +Program (independent of having been made by running the Program). +Whether that is true depends on what the Program does. + + 1. You may copy and distribute verbatim copies of the Program's +source code as you receive it, in any medium, provided that you +conspicuously and appropriately publish on each copy an appropriate +copyright notice and disclaimer of warranty; keep intact all the +notices that refer to this License and to the absence of any warranty; +and give any other recipients of the Program a copy of this License +along with the Program. + +You may charge a fee for the physical act of transferring a copy, and +you may at your option offer warranty protection in exchange for a fee. + + 2. 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It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) <year> <name of author> + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + <signature of Ty Coon>, 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/ChangeLog b/ChangeLog new file mode 100644 index 0000000..60453fb --- /dev/null +++ b/ChangeLog @@ -0,0 +1,140 @@ +2024-01-21 Antonio Diaz Diaz <antonio@gnu.org> + + * Version 1.14 released. + * New options '--empty-error' and '--marking-error'. + * main.c: Reformat file diagnostics as 'PROGRAM: FILE: MESSAGE'. + (show_option_error): New function showing argument and option name. + (main): Make -o preserve date/mode/owner if 1 input file. + (open_outstream): Create missing intermediate directories. + * lzip.h: Rename verify_* to check_*. + * configure, Makefile.in: New variable 'MAKEINFO'. + * INSTALL: Document use of CFLAGS+='--std=c99 -D_XOPEN_SOURCE=500'. + * testsuite: New test files fox6.lz, fox6_mark.lz. + +2022-01-22 Antonio Diaz Diaz <antonio@gnu.org> + + * Version 1.13 released. + * Decompression time has been reduced by 5-12% depending on the file. + * main.c (getnum): Show option name and valid range if error. + +2021-01-01 Antonio Diaz Diaz <antonio@gnu.org> + + * Version 1.12 released. + * main.c (main): Report an error if a file name is empty. + Make '-o' behave like '-c', but writing to file instead of stdout. + Do not open output if input is a terminal. + * Replace 'decompressed', 'compressed' with 'out', 'in' in output. + * lzip_index.c: Improve messages for corruption in last header. + * main.c: Set a valid invocation_name even if argc == 0. + * Document extraction from tar.lz in '--help' output and man page. + * testsuite: Add 9 new test files. + +2019-01-01 Antonio Diaz Diaz <antonio@gnu.org> + + * Version 1.11 released. + * Rename File_* to Lzip_*. + * lzip.h (Lzip_trailer): New function 'Lt_verify_consistency'. + * lzip_index.c: Detect some kinds of corrupt trailers. + * main.c (main): Check return value of close( infd ). + * main.c: Compile on DOS with DJGPP. + * configure: Accept appending to CFLAGS; 'CFLAGS+=OPTIONS'. + * INSTALL: Document use of CFLAGS+='-D __USE_MINGW_ANSI_STDIO'. + +2018-02-05 Antonio Diaz Diaz <antonio@gnu.org> + + * Version 1.10 released. + * main.c: New option '--loose-trailing'. + * Improve corrupt header detection to HD=3. + * main.c: Show corrupt or truncated header in multimember file. + * Replace 'bits/byte' with inverse compression ratio in output. + * Show progress of decompression at verbosity level 2 (-vv). + * Show progress of decompression only if stderr is a terminal. + * main.c: Show final diagnostic when testing multiple files. + * decoder.c (LZd_verify_trailer): Show stored sizes also in hex. + Show dictionary size at verbosity level 4 (-vvvv). + +2017-04-13 Antonio Diaz Diaz <antonio@gnu.org> + + * Version 1.9 released. + * The option '-l, --list' has been ported from lziprecover. + * Don't allow mixing different operations (-d, -l or -t). + * Decompression time has been reduced by 7%. + * main.c: Continue testing if any input file is a terminal. + * main.c: Show trailing data in both hexadecimal and ASCII. + * lzip_index.c: Improve detection of bad dict and trailing data. + * lzip.h: Unify messages for bad magic, trailing data, etc. + +2016-05-12 Antonio Diaz Diaz <antonio@gnu.org> + + * Version 1.8 released. + * main.c: New option '-a, --trailing-error'. + * main.c (main): With '-u', check that output file is regular. + * main.c (decompress): Print up to 6 bytes of trailing data + when '-vvvv' is specified. + * decoder.c (LZd_verify_trailer): Remove test of final code. + * main.c (main): Delete '--output' file if infd is a terminal. + * main.c (main): Don't use stdin more than once. + * Error messages synced with lzip-1.18. + * configure: Avoid warning on some shells when testing for gcc. + * check.sh: A POSIX shell is required to run the tests. + * check.sh: Don't check error messages. + +2015-05-27 Antonio Diaz Diaz <antonio@gnu.org> + + * Version 1.7 released. + * Minor changes. + * Makefile.in: New targets 'install*-compress'. + +2014-07-01 Antonio Diaz Diaz <antonio@gnu.org> + + * Version 1.6 released. + * Change license to GPL version 2 or later. + +2014-04-11 Antonio Diaz Diaz <antonio@gnu.org> + + * Version 1.5 released. + * main.c: New option '-u, --buffer-size' (low memory mode). + * main.c (close_and_set_permissions): Behave like 'cp -p'. + +2013-09-17 Antonio Diaz Diaz <antonio@gnu.org> + + * Version 1.4 released. + * main.c (show_header): Don't show header version. + * Minor fixes. + +2013-06-18 Antonio Diaz Diaz <antonio@gnu.org> + + * Version 1.3 released. + * Decompression time has been reduced by 1%. + * main.c (show_header): Show header version if verbosity >= 4. + * Ignore option '-n, --threads' for compatibility with plzip. + * configure: Options now accept a separate argument. + +2013-02-18 Antonio Diaz Diaz <ant_diaz@teleline.es> + + * Version 1.2 released. + * Decompression time has been reduced by 12%. + * Makefile.in: New targets 'install-as-lzip' and 'install-bin'. + * main.c: Use 'setmode' instead of '_setmode' on Windows and OS/2. + +2012-02-26 Antonio Diaz Diaz <ant_diaz@teleline.es> + + * Version 1.1 released. + * main.c (decompress): Print only one status line for each + multi-member file when only one '-v' is specified. + * main.c (close_and_set_permissions): Inability to change output + file attributes has been downgraded from error to warning. + * Change quote characters in messages as advised by GNU Standards. + * configure: Rename 'datadir' to 'datarootdir'. + +2011-01-17 Antonio Diaz Diaz <ant_diaz@teleline.es> + + * Version 1.0 released. + * Initial release. + * Created from the decompression code of clzip 1.1. + + +Copyright (C) 2010-2024 Antonio Diaz Diaz. + +This file is a collection of facts, and thus it is not copyrightable, but just +in case, you have unlimited permission to copy, distribute, and modify it. @@ -0,0 +1,80 @@ +Requirements +------------ +You will need a C99 compiler. (gcc 3.3.6 or newer is recommended). +I use gcc 6.1.0 and 3.3.6, but the code should compile with any standards +compliant compiler. +Gcc is available at http://gcc.gnu.org. + +The operating system must allow signal handlers read access to objects with +static storage duration so that the cleanup handler for Control-C can delete +the partial output file. + + +Procedure +--------- +1. Unpack the archive if you have not done so already: + + tar -xf lunzip[version].tar.lz +or + lzip -cd lunzip[version].tar.lz | tar -xf - + +This creates the directory ./lunzip[version] containing the source code +extracted from the archive. + +2. Change to lunzip directory and run configure. + (Try 'configure --help' for usage instructions). + + cd lunzip[version] + ./configure + + If you choose a C standard, enable the POSIX features explicitly: + + ./configure CFLAGS+='--std=c99 -D_XOPEN_SOURCE=500' + + If you are compiling on MinGW, use: + + ./configure CFLAGS+='-D __USE_MINGW_ANSI_STDIO' + +3. Run make. + + make + +4. Optionally, type 'make check' to run the tests that come with lunzip. + +5. Type 'make install' to install the program and any data files and + documentation. You need root privileges to install into a prefix owned + by root. + + Or type 'make install-compress', which additionally compresses the + man page after installation. + (Installing compressed docs may become the default in the future). + + You can install only the program or the man page by typing + 'make install-bin' or 'make install-man' respectively. + + Instead of 'make install', you can type 'make install-as-lzip' to + install the program and any data files and documentation, and link + the program to the name 'lzip'. + + +Another way +----------- +You can also compile lunzip into a separate directory. +To do this, you must use a version of 'make' that supports the variable +'VPATH', such as GNU 'make'. 'cd' to the directory where you want the +object files and executables to go and run the 'configure' script. +'configure' automatically checks for the source code in '.', in '..', and +in the directory that 'configure' is in. + +'configure' recognizes the option '--srcdir=DIR' to control where to look +for the source code. Usually 'configure' can determine that directory +automatically. + +After running 'configure', you can run 'make' and 'make install' as +explained above. + + +Copyright (C) 2010-2024 Antonio Diaz Diaz. + +This file is free documentation: you have unlimited permission to copy, +distribute, and modify it. diff --git a/Makefile.in b/Makefile.in new file mode 100644 index 0000000..ea04dd8 --- /dev/null +++ b/Makefile.in @@ -0,0 +1,138 @@ + +DISTNAME = $(pkgname)-$(pkgversion) +INSTALL = install +INSTALL_PROGRAM = $(INSTALL) -m 755 +INSTALL_DATA = $(INSTALL) -m 644 +INSTALL_DIR = $(INSTALL) -d -m 755 +SHELL = /bin/sh +CAN_RUN_INSTALLINFO = $(SHELL) -c "install-info --version" > /dev/null 2>&1 + +objs = carg_parser.o lzip_index.o list.o decoder.o main.o + + +.PHONY : all install install-bin install-info install-man \ + install-strip install-compress install-strip-compress \ + install-bin-strip install-info-compress install-man-compress \ + install-as-lzip \ + uninstall uninstall-bin uninstall-info uninstall-man \ + doc info man check dist clean distclean + +all : $(progname) + +$(progname) : $(objs) + $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(objs) + +main.o : main.c + $(CC) $(CPPFLAGS) $(CFLAGS) -DPROGVERSION=\"$(pkgversion)\" -c -o $@ $< + +%.o : %.c + $(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $< + +# prevent 'make' from trying to remake source files +$(VPATH)/configure $(VPATH)/Makefile.in $(VPATH)/doc/$(pkgname).texi : ; +%.h %.c : ; + +$(objs) : Makefile +carg_parser.o : carg_parser.h +decoder.o : lzip.h decoder.h +list.o : lzip.h lzip_index.h +lzip_index.o : lzip.h lzip_index.h +main.o : carg_parser.h lzip.h decoder.h + +doc : man + +info : $(VPATH)/doc/$(pkgname).info + +$(VPATH)/doc/$(pkgname).info : $(VPATH)/doc/$(pkgname).texi + cd $(VPATH)/doc && $(MAKEINFO) $(pkgname).texi + +man : $(VPATH)/doc/$(progname).1 + +$(VPATH)/doc/$(progname).1 : $(progname) + help2man -n 'decompressor for the lzip format' -o $@ --no-info ./$(progname) + +Makefile : $(VPATH)/configure $(VPATH)/Makefile.in + ./config.status + +check : all + @$(VPATH)/testsuite/check.sh $(VPATH)/testsuite $(pkgversion) + +install : install-bin install-man +install-strip : install-bin-strip install-man +install-compress : install-bin install-man-compress +install-strip-compress : install-bin-strip install-man-compress + +install-bin : all + if [ ! -d "$(DESTDIR)$(bindir)" ] ; then $(INSTALL_DIR) "$(DESTDIR)$(bindir)" ; fi + $(INSTALL_PROGRAM) ./$(progname) "$(DESTDIR)$(bindir)/$(progname)" + +install-bin-strip : all + $(MAKE) INSTALL_PROGRAM='$(INSTALL_PROGRAM) -s' install-bin + +install-info : + if [ ! -d "$(DESTDIR)$(infodir)" ] ; then $(INSTALL_DIR) "$(DESTDIR)$(infodir)" ; fi + -rm -f "$(DESTDIR)$(infodir)/$(pkgname).info"* + $(INSTALL_DATA) $(VPATH)/doc/$(pkgname).info "$(DESTDIR)$(infodir)/$(pkgname).info" + -if $(CAN_RUN_INSTALLINFO) ; then \ + install-info --info-dir="$(DESTDIR)$(infodir)" "$(DESTDIR)$(infodir)/$(pkgname).info" ; \ + fi + +install-info-compress : install-info + lzip -v -9 "$(DESTDIR)$(infodir)/$(pkgname).info" + +install-man : + if [ ! -d "$(DESTDIR)$(mandir)/man1" ] ; then $(INSTALL_DIR) "$(DESTDIR)$(mandir)/man1" ; fi + -rm -f "$(DESTDIR)$(mandir)/man1/$(progname).1"* + $(INSTALL_DATA) $(VPATH)/doc/$(progname).1 "$(DESTDIR)$(mandir)/man1/$(progname).1" + +install-man-compress : install-man + lzip -v -9 "$(DESTDIR)$(mandir)/man1/$(progname).1" + +install-as-lzip : install + -rm -f "$(DESTDIR)$(bindir)/lzip" + cd "$(DESTDIR)$(bindir)" && ln -s $(progname) lzip + +uninstall : uninstall-man uninstall-bin + +uninstall-bin : + -rm -f "$(DESTDIR)$(bindir)/$(progname)" + +uninstall-info : + -if $(CAN_RUN_INSTALLINFO) ; then \ + install-info --info-dir="$(DESTDIR)$(infodir)" --remove "$(DESTDIR)$(infodir)/$(pkgname).info" ; \ + fi + -rm -f "$(DESTDIR)$(infodir)/$(pkgname).info"* + +uninstall-man : + -rm -f "$(DESTDIR)$(mandir)/man1/$(progname).1"* + +dist : doc + ln -sf $(VPATH) $(DISTNAME) + tar -Hustar --owner=root --group=root -cvf $(DISTNAME).tar \ + $(DISTNAME)/AUTHORS \ + $(DISTNAME)/COPYING \ + $(DISTNAME)/ChangeLog \ + $(DISTNAME)/INSTALL \ + $(DISTNAME)/Makefile.in \ + $(DISTNAME)/NEWS \ + $(DISTNAME)/README \ + $(DISTNAME)/configure \ + $(DISTNAME)/doc/$(progname).1 \ + $(DISTNAME)/*.h \ + $(DISTNAME)/*.c \ + $(DISTNAME)/testsuite/check.sh \ + $(DISTNAME)/testsuite/test.txt \ + $(DISTNAME)/testsuite/fox.lz \ + $(DISTNAME)/testsuite/fox_*.lz \ + $(DISTNAME)/testsuite/fox6.lz \ + $(DISTNAME)/testsuite/fox6_mark.lz \ + $(DISTNAME)/testsuite/test.txt.lz \ + $(DISTNAME)/testsuite/test_em.txt.lz + rm -f $(DISTNAME) + lzip -v -9 $(DISTNAME).tar + +clean : + -rm -f $(progname) $(objs) + +distclean : clean + -rm -f Makefile config.status *.tar *.tar.lz @@ -0,0 +1,24 @@ +Changes in version 1.14: + +The option '--empty-error', which forces exit status 2 if any empty member +is found, has been added. + +The option '--marking-error', which forces exit status 2 if the first LZMA +byte is non-zero in any member, has been added. + +File diagnostics have been reformatted as 'PROGRAM: FILE: MESSAGE'. + +Diagnostics caused by invalid arguments to command-line options now show the +argument and the name of the option. + +The option '-o, --output' now preserves dates, permissions, and ownership of +the file when decompressing exactly one file. + +The option '-o, --output' now creates missing intermediate directories when +writing to a file. + +The variable MAKEINFO has been added to configure and Makefile.in. + +It has been documented in INSTALL that when choosing a C standard, the POSIX +features need to be enabled explicitly: + ./configure CFLAGS+='--std=c99 -D_XOPEN_SOURCE=500' @@ -0,0 +1,110 @@ +Description + +Lunzip is a decompressor for the lzip format written in C. Its small size +makes it well suited for embedded devices or software installers that need +to decompress files but don't need compression capabilities. Lunzip is +compatible with lzip 1.4 or newer. + +Lzip is a lossless data compressor with a user interface similar to the one +of gzip or bzip2. Lzip uses a simplified form of the 'Lempel-Ziv-Markov +chain-Algorithm' (LZMA) stream format to maximize interoperability. The +maximum dictionary size is 512 MiB so that any lzip file can be decompressed +on 32-bit machines. Lzip provides accurate and robust 3-factor integrity +checking. Lzip can compress about as fast as gzip (lzip -0) or compress most +files more than bzip2 (lzip -9). Decompression speed is intermediate between +gzip and bzip2. Lzip is better than gzip and bzip2 from a data recovery +perspective. Lzip has been designed, written, and tested with great care to +replace gzip and bzip2 as the standard general-purpose compressed format for +Unix-like systems. + +The lzip file format is designed for data sharing and long-term archiving, +taking into account both data integrity and decoder availability: + + * The lzip format provides very safe integrity checking and some data + recovery means. The program lziprecover can repair bit flip errors + (one of the most common forms of data corruption) in lzip files, and + provides data recovery capabilities, including error-checked merging + of damaged copies of a file. + + * The lzip format is as simple as possible (but not simpler). The lzip + manual provides the source code of a simple decompressor along with a + detailed explanation of how it works, so that with the only help of the + lzip manual it would be possible for a digital archaeologist to extract + the data from a lzip file long after quantum computers eventually + render LZMA obsolete. + + * Additionally the lzip reference implementation is copylefted, which + guarantees that it will remain free forever. + +A nice feature of the lzip format is that a corrupt byte is easier to repair +the nearer it is from the beginning of the file. Therefore, with the help of +lziprecover, losing an entire archive just because of a corrupt byte near +the beginning is a thing of the past. + +Lunzip uses the same well-defined exit status values used by bzip2, which +makes it safer than decompressors returning ambiguous warning values (like +gunzip) when it is used as a back end for other programs like tar or zutils. + +Lunzip provides a 'low memory' mode able to decompress any file using as +little memory as 50 kB, irrespective of the dictionary size used to +compress the file. To activate it, specify the size of the output buffer +with the option '--buffer-size' and lunzip will use the decompressed +file as dictionary for distances beyond the buffer size. Of course, the +larger the difference between the buffer size and the dictionary size, the +more accesses to disk are needed and the slower the decompression is. +This 'low memory' mode only works when decompressing to a regular file +and is intended for systems without enough memory (RAM + swap) to keep +the whole dictionary at once. It has been tested on a laptop with a 486 +processor and 4 MiB of RAM. + +The option '--buffer-size' may help to decompress a file erroneously created +with a dictionary size much larger than the uncompressed size. (Lzip adjusts +the dictionary size to the uncompressed size, but third-party tools may not). + +The amount of memory required by lunzip to decompress a file is about 46 kB +larger than the dictionary size used to compress that file, unless +'--buffer-size' is specified. + +Lunzip attempts to guess the name for the decompressed file from that of +the compressed file as follows: + +filename.lz becomes filename +filename.tlz becomes filename.tar +anyothername becomes anyothername.out + +Decompressing a file is much like copying or moving it. Therefore lunzip +preserves the access and modification dates, permissions, and, if you have +appropriate privileges, ownership of the file just as 'cp -p' does. (If the +user ID or the group ID can't be duplicated, the file permission bits +S_ISUID and S_ISGID are cleared). + +Lunzip is able to read from some types of non-regular files if either the +option '-c' or the option '-o' is specified. + +If no file names are specified, lunzip decompresses from standard input to +standard output. In this case, lunzip refuses to read compressed input from +a terminal, as this might leave the terminal in an abnormal state. + +Lunzip correctly decompresses a file which is the concatenation of two or +more compressed files. The result is the concatenation of the corresponding +decompressed files. Integrity testing of concatenated compressed files is +also supported. + +The ideas embodied in lunzip are due to (at least) the following people: +Abraham Lempel and Jacob Ziv (for the LZ algorithm), Andrei Markov (for the +definition of Markov chains), G.N.N. Martin (for the definition of range +encoding), Igor Pavlov (for putting all the above together in LZMA), and +Julian Seward (for bzip2's CLI). + +LANGUAGE NOTE: Uncompressed = not compressed = plain data; it may never have +been compressed. Decompressed is used to refer to data which have undergone +the process of decompression. + + +Copyright (C) 2010-2024 Antonio Diaz Diaz. + +This file is free documentation: you have unlimited permission to copy, +distribute, and modify it. + +The file Makefile.in is a data file used by configure to produce the Makefile. +It has the same copyright owner and permissions that configure itself. diff --git a/carg_parser.c b/carg_parser.c new file mode 100644 index 0000000..edb4eb9 --- /dev/null +++ b/carg_parser.c @@ -0,0 +1,319 @@ +/* Arg_parser - POSIX/GNU command-line argument parser. (C version) + Copyright (C) 2006-2024 Antonio Diaz Diaz. + + This library is free software. Redistribution and use in source and + binary forms, with or without modification, are permitted provided + that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright + notice, this list of conditions, and the following disclaimer. + + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions, and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +*/ + +#include <stdlib.h> +#include <string.h> + +#include "carg_parser.h" + + +/* assure at least a minimum size for buffer 'buf' */ +static void * ap_resize_buffer( void * buf, const int min_size ) + { + if( buf ) buf = realloc( buf, min_size ); + else buf = malloc( min_size ); + return buf; + } + + +static char push_back_record( struct Arg_parser * const ap, const int code, + const char * const long_name, + const char * const argument ) + { + struct ap_Record * p; + void * tmp = ap_resize_buffer( ap->data, + ( ap->data_size + 1 ) * sizeof (struct ap_Record) ); + if( !tmp ) return 0; + ap->data = (struct ap_Record *)tmp; + p = &(ap->data[ap->data_size]); + p->code = code; + if( long_name ) + { + const int len = strlen( long_name ); + p->parsed_name = (char *)malloc( len + 2 + 1 ); + if( !p->parsed_name ) return 0; + p->parsed_name[0] = p->parsed_name[1] = '-'; + strncpy( p->parsed_name + 2, long_name, len + 1 ); + } + else if( code > 0 && code < 256 ) + { + p->parsed_name = (char *)malloc( 2 + 1 ); + if( !p->parsed_name ) return 0; + p->parsed_name[0] = '-'; p->parsed_name[1] = code; p->parsed_name[2] = 0; + } + else p->parsed_name = 0; + if( argument ) + { + const int len = strlen( argument ); + p->argument = (char *)malloc( len + 1 ); + if( !p->argument ) { free( p->parsed_name ); return 0; } + strncpy( p->argument, argument, len + 1 ); + } + else p->argument = 0; + ++ap->data_size; + return 1; + } + + +static char add_error( struct Arg_parser * const ap, const char * const msg ) + { + const int len = strlen( msg ); + void * tmp = ap_resize_buffer( ap->error, ap->error_size + len + 1 ); + if( !tmp ) return 0; + ap->error = (char *)tmp; + strncpy( ap->error + ap->error_size, msg, len + 1 ); + ap->error_size += len; + return 1; + } + + +static void free_data( struct Arg_parser * const ap ) + { + int i; + for( i = 0; i < ap->data_size; ++i ) + { free( ap->data[i].argument ); free( ap->data[i].parsed_name ); } + if( ap->data ) { free( ap->data ); ap->data = 0; } + ap->data_size = 0; + } + + +/* Return 0 only if out of memory. */ +static char parse_long_option( struct Arg_parser * const ap, + const char * const opt, const char * const arg, + const struct ap_Option options[], + int * const argindp ) + { + unsigned len; + int index = -1, i; + char exact = 0, ambig = 0; + + for( len = 0; opt[len+2] && opt[len+2] != '='; ++len ) ; + + /* Test all long options for either exact match or abbreviated matches. */ + for( i = 0; options[i].code != 0; ++i ) + if( options[i].long_name && + strncmp( options[i].long_name, &opt[2], len ) == 0 ) + { + if( strlen( options[i].long_name ) == len ) /* Exact match found */ + { index = i; exact = 1; break; } + else if( index < 0 ) index = i; /* First nonexact match found */ + else if( options[index].code != options[i].code || + options[index].has_arg != options[i].has_arg ) + ambig = 1; /* Second or later nonexact match found */ + } + + if( ambig && !exact ) + { + add_error( ap, "option '" ); add_error( ap, opt ); + add_error( ap, "' is ambiguous" ); + return 1; + } + + if( index < 0 ) /* nothing found */ + { + add_error( ap, "unrecognized option '" ); add_error( ap, opt ); + add_error( ap, "'" ); + return 1; + } + + ++*argindp; + + if( opt[len+2] ) /* '--<long_option>=<argument>' syntax */ + { + if( options[index].has_arg == ap_no ) + { + add_error( ap, "option '--" ); add_error( ap, options[index].long_name ); + add_error( ap, "' doesn't allow an argument" ); + return 1; + } + if( options[index].has_arg == ap_yes && !opt[len+3] ) + { + add_error( ap, "option '--" ); add_error( ap, options[index].long_name ); + add_error( ap, "' requires an argument" ); + return 1; + } + return push_back_record( ap, options[index].code, + options[index].long_name, &opt[len+3] ); + } + + if( options[index].has_arg == ap_yes ) + { + if( !arg || !arg[0] ) + { + add_error( ap, "option '--" ); add_error( ap, options[index].long_name ); + add_error( ap, "' requires an argument" ); + return 1; + } + ++*argindp; + return push_back_record( ap, options[index].code, + options[index].long_name, arg ); + } + + return push_back_record( ap, options[index].code, + options[index].long_name, 0 ); + } + + +/* Return 0 only if out of memory. */ +static char parse_short_option( struct Arg_parser * const ap, + const char * const opt, const char * const arg, + const struct ap_Option options[], + int * const argindp ) + { + int cind = 1; /* character index in opt */ + + while( cind > 0 ) + { + int index = -1, i; + const unsigned char c = opt[cind]; + char code_str[2]; + code_str[0] = c; code_str[1] = 0; + + if( c != 0 ) + for( i = 0; options[i].code; ++i ) + if( c == options[i].code ) + { index = i; break; } + + if( index < 0 ) + { + add_error( ap, "invalid option -- '" ); add_error( ap, code_str ); + add_error( ap, "'" ); + return 1; + } + + if( opt[++cind] == 0 ) { ++*argindp; cind = 0; } /* opt finished */ + + if( options[index].has_arg != ap_no && cind > 0 && opt[cind] ) + { + if( !push_back_record( ap, c, 0, &opt[cind] ) ) return 0; + ++*argindp; cind = 0; + } + else if( options[index].has_arg == ap_yes ) + { + if( !arg || !arg[0] ) + { + add_error( ap, "option requires an argument -- '" ); + add_error( ap, code_str ); add_error( ap, "'" ); + return 1; + } + ++*argindp; cind = 0; + if( !push_back_record( ap, c, 0, arg ) ) return 0; + } + else if( !push_back_record( ap, c, 0, 0 ) ) return 0; + } + return 1; + } + + +char ap_init( struct Arg_parser * const ap, + const int argc, const char * const argv[], + const struct ap_Option options[], const char in_order ) + { + const char ** non_options = 0; /* skipped non-options */ + int non_options_size = 0; /* number of skipped non-options */ + int argind = 1; /* index in argv */ + char done = 0; /* false until success */ + + ap->data = 0; + ap->error = 0; + ap->data_size = 0; + ap->error_size = 0; + if( argc < 2 || !argv || !options ) return 1; + + while( argind < argc ) + { + const unsigned char ch1 = argv[argind][0]; + const unsigned char ch2 = ch1 ? argv[argind][1] : 0; + + if( ch1 == '-' && ch2 ) /* we found an option */ + { + const char * const opt = argv[argind]; + const char * const arg = ( argind + 1 < argc ) ? argv[argind+1] : 0; + if( ch2 == '-' ) + { + if( !argv[argind][2] ) { ++argind; break; } /* we found "--" */ + else if( !parse_long_option( ap, opt, arg, options, &argind ) ) goto out; + } + else if( !parse_short_option( ap, opt, arg, options, &argind ) ) goto out; + if( ap->error ) break; + } + else + { + if( in_order ) + { if( !push_back_record( ap, 0, 0, argv[argind++] ) ) goto out; } + else + { + void * tmp = ap_resize_buffer( non_options, + ( non_options_size + 1 ) * sizeof *non_options ); + if( !tmp ) goto out; + non_options = (const char **)tmp; + non_options[non_options_size++] = argv[argind++]; + } + } + } + if( ap->error ) free_data( ap ); + else + { + int i; + for( i = 0; i < non_options_size; ++i ) + if( !push_back_record( ap, 0, 0, non_options[i] ) ) goto out; + while( argind < argc ) + if( !push_back_record( ap, 0, 0, argv[argind++] ) ) goto out; + } + done = 1; +out: if( non_options ) free( non_options ); + return done; + } + + +void ap_free( struct Arg_parser * const ap ) + { + free_data( ap ); + if( ap->error ) { free( ap->error ); ap->error = 0; } + ap->error_size = 0; + } + + +const char * ap_error( const struct Arg_parser * const ap ) + { return ap->error; } + + +int ap_arguments( const struct Arg_parser * const ap ) + { return ap->data_size; } + + +int ap_code( const struct Arg_parser * const ap, const int i ) + { + if( i < 0 || i >= ap_arguments( ap ) ) return 0; + return ap->data[i].code; + } + + +const char * ap_parsed_name( const struct Arg_parser * const ap, const int i ) + { + if( i < 0 || i >= ap_arguments( ap ) || !ap->data[i].parsed_name ) return ""; + return ap->data[i].parsed_name; + } + + +const char * ap_argument( const struct Arg_parser * const ap, const int i ) + { + if( i < 0 || i >= ap_arguments( ap ) || !ap->data[i].argument ) return ""; + return ap->data[i].argument; + } diff --git a/carg_parser.h b/carg_parser.h new file mode 100644 index 0000000..69ce271 --- /dev/null +++ b/carg_parser.h @@ -0,0 +1,97 @@ +/* Arg_parser - POSIX/GNU command-line argument parser. (C version) + Copyright (C) 2006-2024 Antonio Diaz Diaz. + + This library is free software. Redistribution and use in source and + binary forms, with or without modification, are permitted provided + that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright + notice, this list of conditions, and the following disclaimer. + + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions, and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +*/ + +/* Arg_parser reads the arguments in 'argv' and creates a number of + option codes, option arguments, and non-option arguments. + + In case of error, 'ap_error' returns a non-null pointer to an error + message. + + 'options' is an array of 'struct ap_Option' terminated by an element + containing a code which is zero. A null long_name means a short-only + option. A code value outside the unsigned char range means a long-only + option. + + Arg_parser normally makes it appear as if all the option arguments + were specified before all the non-option arguments for the purposes + of parsing, even if the user of your program intermixed option and + non-option arguments. If you want the arguments in the exact order + the user typed them, call 'ap_init' with 'in_order' = true. + + The argument '--' terminates all options; any following arguments are + treated as non-option arguments, even if they begin with a hyphen. + + The syntax for optional option arguments is '-<short_option><argument>' + (without whitespace), or '--<long_option>=<argument>'. +*/ + +#ifdef __cplusplus +extern "C" { +#endif + +enum ap_Has_arg { ap_no, ap_yes, ap_maybe }; + +struct ap_Option + { + int code; /* Short option letter or code ( code != 0 ) */ + const char * long_name; /* Long option name (maybe null) */ + enum ap_Has_arg has_arg; + }; + + +struct ap_Record + { + int code; + char * parsed_name; + char * argument; + }; + + +struct Arg_parser + { + struct ap_Record * data; + char * error; + int data_size; + int error_size; + }; + + +char ap_init( struct Arg_parser * const ap, + const int argc, const char * const argv[], + const struct ap_Option options[], const char in_order ); + +void ap_free( struct Arg_parser * const ap ); + +const char * ap_error( const struct Arg_parser * const ap ); + +/* The number of arguments parsed. May be different from argc. */ +int ap_arguments( const struct Arg_parser * const ap ); + +/* If ap_code( i ) is 0, ap_argument( i ) is a non-option. + Else ap_argument( i ) is the option's argument (or empty). */ +int ap_code( const struct Arg_parser * const ap, const int i ); + +/* Full name of the option parsed (short or long). */ +const char * ap_parsed_name( const struct Arg_parser * const ap, const int i ); + +const char * ap_argument( const struct Arg_parser * const ap, const int i ); + +#ifdef __cplusplus +} +#endif diff --git a/configure b/configure new file mode 100755 index 0000000..a6e4a93 --- /dev/null +++ b/configure @@ -0,0 +1,198 @@ +#! /bin/sh +# configure script for Lunzip - Decompressor for the lzip format +# Copyright (C) 2010-2024 Antonio Diaz Diaz. +# +# This configure script is free software: you have unlimited permission +# to copy, distribute, and modify it. + +pkgname=lunzip +pkgversion=1.14 +progname=lunzip +srctrigger=doc/${progname}.1 + +# clear some things potentially inherited from environment. +LC_ALL=C +export LC_ALL +srcdir= +prefix=/usr/local +exec_prefix='$(prefix)' +bindir='$(exec_prefix)/bin' +datarootdir='$(prefix)/share' +infodir='$(datarootdir)/info' +mandir='$(datarootdir)/man' +CC=gcc +CPPFLAGS= +CFLAGS='-Wall -W -O2' +LDFLAGS= +MAKEINFO=makeinfo + +# checking whether we are using GNU C. +/bin/sh -c "${CC} --version" > /dev/null 2>&1 || { CC=cc ; CFLAGS=-O2 ; } + +# Loop over all args +args= +no_create= +while [ $# != 0 ] ; do + + # Get the first arg, and shuffle + option=$1 ; arg2=no + shift + + # Add the argument quoted to args + if [ -z "${args}" ] ; then args="\"${option}\"" + else args="${args} \"${option}\"" ; fi + + # Split out the argument for options that take them + case ${option} in + *=*) optarg=`echo "${option}" | sed -e 's,^[^=]*=,,;s,/$,,'` ;; + esac + + # Process the options + case ${option} in + --help | -h) + echo "Usage: $0 [OPTION]... [VAR=VALUE]..." + echo + echo "To assign makefile variables (e.g., CC, CFLAGS...), specify them as" + echo "arguments to configure in the form VAR=VALUE." + echo + echo "Options and variables: [defaults in brackets]" + echo " -h, --help display this help and exit" + echo " -V, --version output version information and exit" + echo " --srcdir=DIR find the source code in DIR [. or ..]" + echo " --prefix=DIR install into DIR [${prefix}]" + echo " --exec-prefix=DIR base directory for arch-dependent files [${exec_prefix}]" + echo " --bindir=DIR user executables directory [${bindir}]" + echo " --datarootdir=DIR base directory for doc and data [${datarootdir}]" + echo " --infodir=DIR info files directory [${infodir}]" + echo " --mandir=DIR man pages directory [${mandir}]" + echo " CC=COMPILER C compiler to use [${CC}]" + echo " CPPFLAGS=OPTIONS command-line options for the preprocessor [${CPPFLAGS}]" + echo " CFLAGS=OPTIONS command-line options for the C compiler [${CFLAGS}]" + echo " CFLAGS+=OPTIONS append options to the current value of CFLAGS" + echo " LDFLAGS=OPTIONS command-line options for the linker [${LDFLAGS}]" + echo " MAKEINFO=NAME makeinfo program to use [${MAKEINFO}]" + echo + exit 0 ;; + --version | -V) + echo "Configure script for ${pkgname} version ${pkgversion}" + exit 0 ;; + --srcdir) srcdir=$1 ; arg2=yes ;; + --prefix) prefix=$1 ; arg2=yes ;; + --exec-prefix) exec_prefix=$1 ; arg2=yes ;; + --bindir) bindir=$1 ; arg2=yes ;; + --datarootdir) datarootdir=$1 ; arg2=yes ;; + --infodir) infodir=$1 ; arg2=yes ;; + --mandir) mandir=$1 ; arg2=yes ;; + + --srcdir=*) srcdir=${optarg} ;; + --prefix=*) prefix=${optarg} ;; + --exec-prefix=*) exec_prefix=${optarg} ;; + --bindir=*) bindir=${optarg} ;; + --datarootdir=*) datarootdir=${optarg} ;; + --infodir=*) infodir=${optarg} ;; + --mandir=*) mandir=${optarg} ;; + --no-create) no_create=yes ;; + + CC=*) CC=${optarg} ;; + CPPFLAGS=*) CPPFLAGS=${optarg} ;; + CFLAGS=*) CFLAGS=${optarg} ;; + CFLAGS+=*) CFLAGS="${CFLAGS} ${optarg}" ;; + LDFLAGS=*) LDFLAGS=${optarg} ;; + MAKEINFO=*) MAKEINFO=${optarg} ;; + + --*) + echo "configure: WARNING: unrecognized option: '${option}'" 1>&2 ;; + *=* | *-*-*) ;; + *) + echo "configure: unrecognized option: '${option}'" 1>&2 + echo "Try 'configure --help' for more information." 1>&2 + exit 1 ;; + esac + + # Check if the option took a separate argument + if [ "${arg2}" = yes ] ; then + if [ $# != 0 ] ; then args="${args} \"$1\"" ; shift + else echo "configure: Missing argument to '${option}'" 1>&2 + exit 1 + fi + fi +done + +# Find the source code, if location was not specified. +srcdirtext= +if [ -z "${srcdir}" ] ; then + srcdirtext="or . or .." ; srcdir=. + if [ ! -r "${srcdir}/${srctrigger}" ] ; then srcdir=.. ; fi + if [ ! -r "${srcdir}/${srctrigger}" ] ; then + ## the sed command below emulates the dirname command + srcdir=`echo "$0" | sed -e 's,[^/]*$,,;s,/$,,;s,^$,.,'` + fi +fi + +if [ ! -r "${srcdir}/${srctrigger}" ] ; then + echo "configure: Can't find source code in ${srcdir} ${srcdirtext}" 1>&2 + echo "configure: (At least ${srctrigger} is missing)." 1>&2 + exit 1 +fi + +# Set srcdir to . if that's what it is. +if [ "`pwd`" = "`cd "${srcdir}" ; pwd`" ] ; then srcdir=. ; fi + +echo +if [ -z "${no_create}" ] ; then + echo "creating config.status" + rm -f config.status + cat > config.status << EOF +#! /bin/sh +# This file was generated automatically by configure. Don't edit. +# Run this file to recreate the current configuration. +# +# This script is free software: you have unlimited permission +# to copy, distribute, and modify it. + +exec /bin/sh "$0" ${args} --no-create +EOF + chmod +x config.status +fi + +echo "creating Makefile" +echo "VPATH = ${srcdir}" +echo "prefix = ${prefix}" +echo "exec_prefix = ${exec_prefix}" +echo "bindir = ${bindir}" +echo "datarootdir = ${datarootdir}" +echo "infodir = ${infodir}" +echo "mandir = ${mandir}" +echo "CC = ${CC}" +echo "CPPFLAGS = ${CPPFLAGS}" +echo "CFLAGS = ${CFLAGS}" +echo "LDFLAGS = ${LDFLAGS}" +echo "MAKEINFO = ${MAKEINFO}" +rm -f Makefile +cat > Makefile << EOF +# Makefile for Lunzip - Decompressor for the lzip format +# Copyright (C) 2010-2024 Antonio Diaz Diaz. +# This file was generated automatically by configure. Don't edit. +# +# This Makefile is free software: you have unlimited permission +# to copy, distribute, and modify it. + +pkgname = ${pkgname} +pkgversion = ${pkgversion} +progname = ${progname} +VPATH = ${srcdir} +prefix = ${prefix} +exec_prefix = ${exec_prefix} +bindir = ${bindir} +datarootdir = ${datarootdir} +infodir = ${infodir} +mandir = ${mandir} +CC = ${CC} +CPPFLAGS = ${CPPFLAGS} +CFLAGS = ${CFLAGS} +LDFLAGS = ${LDFLAGS} +MAKEINFO = ${MAKEINFO} +EOF +cat "${srcdir}/Makefile.in" >> Makefile + +echo "OK. Now you can run make." diff --git a/decoder.c b/decoder.c new file mode 100644 index 0000000..5f1dc5e --- /dev/null +++ b/decoder.c @@ -0,0 +1,309 @@ +/* Lunzip - Decompressor for the lzip format + Copyright (C) 2010-2024 Antonio Diaz Diaz. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#define _FILE_OFFSET_BITS 64 + +#include <errno.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "lzip.h" +#include "decoder.h" + + +CRC32 crc32; + + +/* Return the number of bytes really read. + If (value returned < size) and (errno == 0), means EOF was reached. +*/ +int readblock( const int fd, uint8_t * const buf, const int size ) + { + int sz = 0; + errno = 0; + while( sz < size ) + { + const int n = read( fd, buf + sz, size - sz ); + if( n > 0 ) sz += n; + else if( n == 0 ) break; /* EOF */ + else if( errno != EINTR ) break; + errno = 0; + } + return sz; + } + + +/* Return the number of bytes really written. + If (value returned < size), it is always an error. +*/ +static int writeblock( const int fd, const uint8_t * const buf, const int size ) + { + int sz = 0; + errno = 0; + while( sz < size ) + { + const int n = write( fd, buf + sz, size - sz ); + if( n > 0 ) sz += n; + else if( n < 0 && errno != EINTR ) break; + errno = 0; + } + return sz; + } + + +unsigned seek_read_back( const int fd, uint8_t * const buf, const int size, + const int offset ) + { + if( lseek( fd, -offset, SEEK_END ) >= 0 ) + return readblock( fd, buf, size ); + return 0; + } + + +bool Rd_read_block( struct Range_decoder * const rdec ) + { + if( !rdec->at_stream_end ) + { + rdec->stream_pos = readblock( rdec->infd, rdec->buffer, rd_buffer_size ); + if( rdec->stream_pos != rd_buffer_size && errno ) + { show_error( "Read error", errno, false ); cleanup_and_fail( 1 ); } + rdec->at_stream_end = ( rdec->stream_pos < rd_buffer_size ); + rdec->partial_member_pos += rdec->pos; + rdec->pos = 0; + show_dprogress( 0, 0, 0, 0 ); + } + return rdec->pos < rdec->stream_pos; + } + + +void LZd_flush_data( struct LZ_decoder * const d ) + { + if( d->pos > d->stream_pos ) + { + const int size = d->pos - d->stream_pos; + CRC32_update_buf( &d->crc, d->buffer + d->stream_pos, size ); + if( d->outfd >= 0 && + writeblock( d->outfd, d->buffer + d->stream_pos, size ) != size ) + { show_error( "Write error", errno, false ); cleanup_and_fail( 1 ); } + if( d->pos >= d->buffer_size ) + { d->partial_data_pos += d->pos; d->pos = 0; + if( d->partial_data_pos >= d->dictionary_size ) d->pos_wrapped = true; } + d->stream_pos = d->pos; + } + } + + +static int LZd_check_trailer( struct LZ_decoder * const d, + struct Pretty_print * const pp, + const bool ignore_empty ) + { + Lzip_trailer trailer; + int size = Rd_read_data( d->rdec, trailer, Lt_size ); + bool error = false; + + if( size < Lt_size ) + { + error = true; + if( verbosity >= 0 ) + { Pp_show_msg( pp, 0 ); + fprintf( stderr, "Trailer truncated at trailer position %d;" + " some checks may fail.\n", size ); } + while( size < Lt_size ) trailer[size++] = 0; + } + + const unsigned td_crc = Lt_get_data_crc( trailer ); + if( td_crc != LZd_crc( d ) ) + { + error = true; + if( verbosity >= 0 ) + { Pp_show_msg( pp, 0 ); + fprintf( stderr, "CRC mismatch; stored %08X, computed %08X\n", + td_crc, LZd_crc( d ) ); } + } + const unsigned long long data_size = LZd_data_position( d ); + const unsigned long long td_size = Lt_get_data_size( trailer ); + if( td_size != data_size ) + { + error = true; + if( verbosity >= 0 ) + { Pp_show_msg( pp, 0 ); + fprintf( stderr, "Data size mismatch; stored %llu (0x%llX), computed %llu (0x%llX)\n", + td_size, td_size, data_size, data_size ); } + } + const unsigned long long member_size = Rd_member_position( d->rdec ); + const unsigned long long tm_size = Lt_get_member_size( trailer ); + if( tm_size != member_size ) + { + error = true; + if( verbosity >= 0 ) + { Pp_show_msg( pp, 0 ); + fprintf( stderr, "Member size mismatch; stored %llu (0x%llX), computed %llu (0x%llX)\n", + tm_size, tm_size, member_size, member_size ); } + } + if( error ) return 3; + if( !ignore_empty && data_size == 0 ) return 5; + if( verbosity >= 2 ) + { + if( verbosity >= 4 ) show_header( d->dictionary_size ); + if( data_size == 0 || member_size == 0 ) + fputs( "no data compressed. ", stderr ); + else + fprintf( stderr, "%6.3f:1, %5.2f%% ratio, %5.2f%% saved. ", + (double)data_size / member_size, + ( 100.0 * member_size ) / data_size, + 100.0 - ( ( 100.0 * member_size ) / data_size ) ); + if( verbosity >= 4 ) fprintf( stderr, "CRC %08X, ", td_crc ); + if( verbosity >= 3 ) + fprintf( stderr, "%9llu out, %8llu in. ", data_size, member_size ); + } + return 0; + } + + +/* Return value: 0 = OK, 1 = decoder error, 2 = unexpected EOF, + 3 = trailer error, 4 = unknown marker found, + 5 = empty member found, 6 = marked member found. */ +int LZd_decode_member( struct LZ_decoder * const d, + const struct Cl_options * const cl_opts, + struct Pretty_print * const pp ) + { + struct Range_decoder * const rdec = d->rdec; + Bit_model bm_literal[1<<literal_context_bits][0x300]; + Bit_model bm_match[states][pos_states]; + Bit_model bm_rep[states]; + Bit_model bm_rep0[states]; + Bit_model bm_rep1[states]; + Bit_model bm_rep2[states]; + Bit_model bm_len[states][pos_states]; + Bit_model bm_dis_slot[len_states][1<<dis_slot_bits]; + Bit_model bm_dis[modeled_distances-end_dis_model+1]; + Bit_model bm_align[dis_align_size]; + struct Len_model match_len_model; + struct Len_model rep_len_model; + unsigned rep0 = 0; /* rep[0-3] latest four distances */ + unsigned rep1 = 0; /* used for efficient coding of */ + unsigned rep2 = 0; /* repeated distances */ + unsigned rep3 = 0; + State state = 0; + const bool full_buffer = d->buffer_size >= d->dictionary_size; + + Bm_array_init( bm_literal[0], (1 << literal_context_bits) * 0x300 ); + Bm_array_init( bm_match[0], states * pos_states ); + Bm_array_init( bm_rep, states ); + Bm_array_init( bm_rep0, states ); + Bm_array_init( bm_rep1, states ); + Bm_array_init( bm_rep2, states ); + Bm_array_init( bm_len[0], states * pos_states ); + Bm_array_init( bm_dis_slot[0], len_states * (1 << dis_slot_bits) ); + Bm_array_init( bm_dis, modeled_distances - end_dis_model + 1 ); + Bm_array_init( bm_align, dis_align_size ); + Lm_init( &match_len_model ); + Lm_init( &rep_len_model ); + + if( !Rd_load( rdec, cl_opts->ignore_marking ) ) return 6; + while( !Rd_finished( rdec ) ) + { + const int pos_state = LZd_data_position( d ) & pos_state_mask; + if( Rd_decode_bit( rdec, &bm_match[state][pos_state] ) == 0 ) /* 1st bit */ + { + /* literal byte */ + Bit_model * const bm = bm_literal[get_lit_state(LZd_peek_prev( d ))]; + if( ( state = St_set_char( state ) ) < 4 ) + LZd_put_byte( d, Rd_decode_tree8( rdec, bm ) ); + else + LZd_put_byte( d, Rd_decode_matched( rdec, bm, LZd_peek( d, rep0 ) ) ); + continue; + } + /* match or repeated match */ + int len; + if( Rd_decode_bit( rdec, &bm_rep[state] ) != 0 ) /* 2nd bit */ + { + if( Rd_decode_bit( rdec, &bm_rep0[state] ) == 0 ) /* 3rd bit */ + { + if( Rd_decode_bit( rdec, &bm_len[state][pos_state] ) == 0 ) /* 4th bit */ + { state = St_set_short_rep( state ); + LZd_put_byte( d, LZd_peek( d, rep0 ) ); continue; } + } + else + { + unsigned distance; + if( Rd_decode_bit( rdec, &bm_rep1[state] ) == 0 ) /* 4th bit */ + distance = rep1; + else + { + if( Rd_decode_bit( rdec, &bm_rep2[state] ) == 0 ) /* 5th bit */ + distance = rep2; + else + { distance = rep3; rep3 = rep2; } + rep2 = rep1; + } + rep1 = rep0; + rep0 = distance; + } + state = St_set_rep( state ); + len = Rd_decode_len( rdec, &rep_len_model, pos_state ); + } + else /* match */ + { + len = Rd_decode_len( rdec, &match_len_model, pos_state ); + unsigned distance = Rd_decode_tree6( rdec, bm_dis_slot[get_len_state(len)] ); + if( distance >= start_dis_model ) + { + const unsigned dis_slot = distance; + const int direct_bits = ( dis_slot >> 1 ) - 1; + distance = ( 2 | ( dis_slot & 1 ) ) << direct_bits; + if( dis_slot < end_dis_model ) + distance += Rd_decode_tree_reversed( rdec, + bm_dis + ( distance - dis_slot ), direct_bits ); + else + { + distance += + Rd_decode( rdec, direct_bits - dis_align_bits ) << dis_align_bits; + distance += Rd_decode_tree_reversed4( rdec, bm_align ); + if( distance == 0xFFFFFFFFU ) /* marker found */ + { + Rd_normalize( rdec ); + LZd_flush_data( d ); + if( len == min_match_len ) /* End Of Stream marker */ + return LZd_check_trailer( d, pp, cl_opts->ignore_empty ); + if( len == min_match_len + 1 ) /* Sync Flush marker */ + { Rd_load( rdec, true ); continue; } + if( verbosity >= 0 ) + { + Pp_show_msg( pp, 0 ); + fprintf( stderr, "Unsupported marker code '%d'\n", len ); + } + return 4; + } + } + } + rep3 = rep2; rep2 = rep1; rep1 = rep0; rep0 = distance; + state = St_set_match( state ); + if( rep0 >= d->dictionary_size || + ( !d->pos_wrapped && rep0 >= LZd_data_position( d ) ) ) + { LZd_flush_data( d ); return 1; } + } + if( full_buffer || rep0 < d->buffer_size ) LZd_copy_block( d, rep0, len ); + else LZd_copy_block2( d, rep0, len ); + } + LZd_flush_data( d ); + return 2; + } diff --git a/decoder.h b/decoder.h new file mode 100644 index 0000000..8a948e9 --- /dev/null +++ b/decoder.h @@ -0,0 +1,397 @@ +/* Lunzip - Decompressor for the lzip format + Copyright (C) 2010-2024 Antonio Diaz Diaz. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +enum { rd_buffer_size = 16384 }; + +struct Range_decoder + { + unsigned long long partial_member_pos; + uint8_t * buffer; /* input buffer */ + int pos; /* current pos in buffer */ + int stream_pos; /* when reached, a new block must be read */ + uint32_t code; + uint32_t range; + int infd; /* input file descriptor */ + bool at_stream_end; + }; + +bool Rd_read_block( struct Range_decoder * const rdec ); + +static inline bool Rd_init( struct Range_decoder * const rdec, const int ifd ) + { + rdec->partial_member_pos = 0; + rdec->buffer = (uint8_t *)malloc( rd_buffer_size ); + if( !rdec->buffer ) return false; + rdec->pos = 0; + rdec->stream_pos = 0; + rdec->code = 0; + rdec->range = 0xFFFFFFFFU; + rdec->infd = ifd; + rdec->at_stream_end = false; + return true; + } + +static inline void Rd_free( struct Range_decoder * const rdec ) + { free( rdec->buffer ); } + +static inline bool Rd_finished( struct Range_decoder * const rdec ) + { return rdec->pos >= rdec->stream_pos && !Rd_read_block( rdec ); } + +static inline unsigned long long +Rd_member_position( const struct Range_decoder * const rdec ) + { return rdec->partial_member_pos + rdec->pos; } + +static inline void Rd_reset_member_position( struct Range_decoder * const rdec ) + { rdec->partial_member_pos = 0; rdec->partial_member_pos -= rdec->pos; } + +static inline uint8_t Rd_get_byte( struct Range_decoder * const rdec ) + { + /* 0xFF avoids decoder error if member is truncated at EOS marker */ + if( Rd_finished( rdec ) ) return 0xFF; + return rdec->buffer[rdec->pos++]; + } + +static inline int Rd_read_data( struct Range_decoder * const rdec, + uint8_t * const outbuf, const int size ) + { + int sz = 0; + while( sz < size && !Rd_finished( rdec ) ) + { + const int rd = min( size - sz, rdec->stream_pos - rdec->pos ); + memcpy( outbuf + sz, rdec->buffer + rdec->pos, rd ); + rdec->pos += rd; + sz += rd; + } + return sz; + } + +static inline bool Rd_load( struct Range_decoder * const rdec, + const bool ignore_marking ) + { + int i; + rdec->code = 0; + rdec->range = 0xFFFFFFFFU; + /* check and discard first byte of the LZMA stream */ + if( Rd_get_byte( rdec ) != 0 && !ignore_marking ) return false; + for( i = 0; i < 4; ++i ) rdec->code = (rdec->code << 8) | Rd_get_byte( rdec ); + return true; + } + +static inline void Rd_normalize( struct Range_decoder * const rdec ) + { + if( rdec->range <= 0x00FFFFFFU ) + { rdec->range <<= 8; rdec->code = (rdec->code << 8) | Rd_get_byte( rdec ); } + } + +static inline unsigned Rd_decode( struct Range_decoder * const rdec, + const int num_bits ) + { + unsigned symbol = 0; + int i; + for( i = num_bits; i > 0; --i ) + { + Rd_normalize( rdec ); + rdec->range >>= 1; +/* symbol <<= 1; */ +/* if( rdec->code >= rdec->range ) { rdec->code -= rdec->range; symbol |= 1; } */ + const bool bit = ( rdec->code >= rdec->range ); + symbol <<= 1; symbol += bit; + rdec->code -= rdec->range & ( 0U - bit ); + } + return symbol; + } + +static inline unsigned Rd_decode_bit( struct Range_decoder * const rdec, + Bit_model * const probability ) + { + Rd_normalize( rdec ); + const uint32_t bound = ( rdec->range >> bit_model_total_bits ) * *probability; + if( rdec->code < bound ) + { + rdec->range = bound; + *probability += ( bit_model_total - *probability ) >> bit_model_move_bits; + return 0; + } + else + { + rdec->code -= bound; + rdec->range -= bound; + *probability -= *probability >> bit_model_move_bits; + return 1; + } + } + +static inline void Rd_decode_symbol_bit( struct Range_decoder * const rdec, + Bit_model * const probability, unsigned * symbol ) + { + Rd_normalize( rdec ); + *symbol <<= 1; + const uint32_t bound = ( rdec->range >> bit_model_total_bits ) * *probability; + if( rdec->code < bound ) + { + rdec->range = bound; + *probability += ( bit_model_total - *probability ) >> bit_model_move_bits; + } + else + { + rdec->code -= bound; + rdec->range -= bound; + *probability -= *probability >> bit_model_move_bits; + *symbol |= 1; + } + } + +static inline void Rd_decode_symbol_bit_reversed( struct Range_decoder * const rdec, + Bit_model * const probability, unsigned * model, + unsigned * symbol, const int i ) + { + Rd_normalize( rdec ); + *model <<= 1; + const uint32_t bound = ( rdec->range >> bit_model_total_bits ) * *probability; + if( rdec->code < bound ) + { + rdec->range = bound; + *probability += ( bit_model_total - *probability ) >> bit_model_move_bits; + } + else + { + rdec->code -= bound; + rdec->range -= bound; + *probability -= *probability >> bit_model_move_bits; + *model |= 1; + *symbol |= 1 << i; + } + } + +static inline unsigned Rd_decode_tree6( struct Range_decoder * const rdec, + Bit_model bm[] ) + { + unsigned symbol = 1; + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + return symbol & 0x3F; + } + +static inline unsigned Rd_decode_tree8( struct Range_decoder * const rdec, + Bit_model bm[] ) + { + unsigned symbol = 1; + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + return symbol & 0xFF; + } + +static inline unsigned +Rd_decode_tree_reversed( struct Range_decoder * const rdec, + Bit_model bm[], const int num_bits ) + { + unsigned model = 1; + unsigned symbol = 0; + int i; + for( i = 0; i < num_bits; ++i ) + Rd_decode_symbol_bit_reversed( rdec, &bm[model], &model, &symbol, i ); + return symbol; + } + +static inline unsigned +Rd_decode_tree_reversed4( struct Range_decoder * const rdec, Bit_model bm[] ) + { + unsigned model = 1; + unsigned symbol = 0; + Rd_decode_symbol_bit_reversed( rdec, &bm[model], &model, &symbol, 0 ); + Rd_decode_symbol_bit_reversed( rdec, &bm[model], &model, &symbol, 1 ); + Rd_decode_symbol_bit_reversed( rdec, &bm[model], &model, &symbol, 2 ); + Rd_decode_symbol_bit_reversed( rdec, &bm[model], &model, &symbol, 3 ); + return symbol; + } + +static inline unsigned Rd_decode_matched( struct Range_decoder * const rdec, + Bit_model bm[], unsigned match_byte ) + { + unsigned symbol = 1; + unsigned mask = 0x100; + while( true ) + { + const unsigned match_bit = ( match_byte <<= 1 ) & mask; + const unsigned bit = Rd_decode_bit( rdec, &bm[symbol+match_bit+mask] ); + symbol <<= 1; symbol += bit; + if( symbol > 0xFF ) return symbol & 0xFF; + mask &= ~(match_bit ^ (bit << 8)); /* if( match_bit != bit ) mask = 0; */ + } + } + +static inline unsigned Rd_decode_len( struct Range_decoder * const rdec, + struct Len_model * const lm, + const int pos_state ) + { + Bit_model * bm; + unsigned mask, offset, symbol = 1; + + if( Rd_decode_bit( rdec, &lm->choice1 ) == 0 ) + { bm = lm->bm_low[pos_state]; mask = 7; offset = 0; goto len3; } + if( Rd_decode_bit( rdec, &lm->choice2 ) == 0 ) + { bm = lm->bm_mid[pos_state]; mask = 7; offset = len_low_symbols; goto len3; } + bm = lm->bm_high; mask = 0xFF; offset = len_low_symbols + len_mid_symbols; + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); +len3: + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + Rd_decode_symbol_bit( rdec, &bm[symbol], &symbol ); + return ( symbol & mask ) + min_match_len + offset; + } + + +struct LZ_decoder + { + unsigned long long partial_data_pos; + struct Range_decoder * rdec; + unsigned dictionary_size; + unsigned buffer_size; + uint8_t * buffer; /* output buffer */ + unsigned pos; /* current pos in buffer */ + unsigned stream_pos; /* first byte not yet written to file */ + uint32_t crc; + int outfd; /* output file descriptor */ + bool pos_wrapped; + }; + +void LZd_flush_data( struct LZ_decoder * const d ); + +unsigned seek_read_back( const int fd, uint8_t * const buf, const int size, + const int offset ); + +static inline uint8_t LZd_peek_prev( const struct LZ_decoder * const d ) + { return d->buffer[((d->pos > 0) ? d->pos : d->buffer_size)-1]; } + +static inline uint8_t LZd_peek( const struct LZ_decoder * const d, + const unsigned distance ) + { + uint8_t b; + if( d->pos > distance ) b = d->buffer[d->pos-distance-1]; + else if( d->buffer_size > distance ) + b = d->buffer[d->buffer_size+d->pos-distance-1]; + else if( seek_read_back( d->outfd, &b, 1, + distance + 1 + d->stream_pos - d->pos ) != 1 ) + { show_error( "Seek error", errno, false ); cleanup_and_fail( 1 ); } + return b; + } + +static inline void LZd_put_byte( struct LZ_decoder * const d, const uint8_t b ) + { + d->buffer[d->pos] = b; + if( ++d->pos >= d->buffer_size ) LZd_flush_data( d ); + } + +static inline void LZd_copy_block( struct LZ_decoder * const d, + const unsigned distance, unsigned len ) + { + unsigned lpos = d->pos, i = lpos - distance - 1; + bool fast, fast2; + if( lpos > distance ) + { + fast = ( len < d->buffer_size - lpos ); + fast2 = ( fast && len <= lpos - i ); + } + else + { + i += d->buffer_size; + fast = ( len < d->buffer_size - i ); /* (i == pos) may happen */ + fast2 = ( fast && len <= i - lpos ); + } + if( fast ) /* no wrap */ + { + d->pos += len; + if( fast2 ) /* no wrap, no overlap */ + memcpy( d->buffer + lpos, d->buffer + i, len ); + else + for( ; len > 0; --len ) d->buffer[lpos++] = d->buffer[i++]; + } + else for( ; len > 0; --len ) + { + d->buffer[d->pos] = d->buffer[i]; + if( ++d->pos >= d->buffer_size ) LZd_flush_data( d ); + if( ++i >= d->buffer_size ) i = 0; + } + } + +/* block is (at least partially) outside of the buffer */ +static inline void LZd_copy_block2( struct LZ_decoder * const d, + const unsigned distance, unsigned len ) + { + if( len < d->buffer_size - d->pos ) /* no wrap */ + { + const unsigned offset = distance + 1 + d->stream_pos - d->pos; + if( len <= offset ) /* block is in file */ + { + if( seek_read_back( d->outfd, d->buffer + d->pos, len, offset ) != len ) + { show_error( "Seek error", errno, false ); cleanup_and_fail( 1 ); } + d->pos += len; + return; + } + } + for( ; len > 0; --len ) + LZd_put_byte( d, LZd_peek( d, distance ) ); + } + +static inline bool LZd_init( struct LZ_decoder * const d, + struct Range_decoder * const rde, + const unsigned buffer_size, + const unsigned dict_size, const int ofd ) + { + d->partial_data_pos = 0; + d->rdec = rde; + d->dictionary_size = dict_size; + d->buffer_size = min( buffer_size, dict_size ); + d->buffer = (uint8_t *)malloc( d->buffer_size ); + if( !d->buffer ) return false; + d->pos = 0; + d->stream_pos = 0; + d->crc = 0xFFFFFFFFU; + d->outfd = ofd; + d->pos_wrapped = false; + /* prev_byte of first byte; also for LZd_peek( 0 ) on corrupt file */ + d->buffer[d->buffer_size-1] = 0; + return true; + } + +static inline void LZd_free( struct LZ_decoder * const d ) + { free( d->buffer ); } + +static inline unsigned LZd_crc( const struct LZ_decoder * const d ) + { return d->crc ^ 0xFFFFFFFFU; } + +static inline unsigned long long +LZd_data_position( const struct LZ_decoder * const d ) + { return d->partial_data_pos + d->pos; } + +int LZd_decode_member( struct LZ_decoder * const d, + const struct Cl_options * const cl_opts, + struct Pretty_print * const pp ); diff --git a/doc/lunzip.1 b/doc/lunzip.1 new file mode 100644 index 0000000..ce64bc9 --- /dev/null +++ b/doc/lunzip.1 @@ -0,0 +1,115 @@ +.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.49.2. +.TH LUNZIP "1" "January 2024" "lunzip 1.14" "User Commands" +.SH NAME +lunzip \- decompressor for the lzip format +.SH SYNOPSIS +.B lunzip +[\fI\,options\/\fR] [\fI\,files\/\fR] +.SH DESCRIPTION +Lunzip is a decompressor for the lzip format written in C. Its small size +makes it well suited for embedded devices or software installers that need +to decompress files but don't need compression capabilities. Lunzip is +compatible with lzip 1.4 or newer. +.PP +Lzip is a lossless data compressor with a user interface similar to the one +of gzip or bzip2. Lzip uses a simplified form of the 'Lempel\-Ziv\-Markov +chain\-Algorithm' (LZMA) stream format to maximize interoperability. The +maximum dictionary size is 512 MiB so that any lzip file can be decompressed +on 32\-bit machines. Lzip provides accurate and robust 3\-factor integrity +checking. Lzip can compress about as fast as gzip (lzip \fB\-0\fR) or compress most +files more than bzip2 (lzip \fB\-9\fR). Decompression speed is intermediate between +gzip and bzip2. Lzip is better than gzip and bzip2 from a data recovery +perspective. Lzip has been designed, written, and tested with great care to +replace gzip and bzip2 as the standard general\-purpose compressed format for +Unix\-like systems. +.PP +Lunzip provides a 'low memory' mode able to decompress any file using as +little memory as 50 kB, irrespective of the dictionary size used to +compress the file. To activate it, specify the size of the output buffer +with the option \fB\-\-buffer\-size\fR and lunzip will use the decompressed +file as dictionary for distances beyond the buffer size. Of course, the +larger the difference between the buffer size and the dictionary size, the +more accesses to disk are needed and the slower the decompression is. +This 'low memory' mode only works when decompressing to a regular file +and is intended for systems without enough memory (RAM + swap) to keep +the whole dictionary at once. +.SH OPTIONS +.TP +\fB\-h\fR, \fB\-\-help\fR +display this help and exit +.TP +\fB\-V\fR, \fB\-\-version\fR +output version information and exit +.TP +\fB\-a\fR, \fB\-\-trailing\-error\fR +exit with error status if trailing data +.TP +\fB\-c\fR, \fB\-\-stdout\fR +write to standard output, keep input files +.TP +\fB\-d\fR, \fB\-\-decompress\fR +decompress (this is the default) +.TP +\fB\-f\fR, \fB\-\-force\fR +overwrite existing output files +.TP +\fB\-k\fR, \fB\-\-keep\fR +keep (don't delete) input files +.TP +\fB\-l\fR, \fB\-\-list\fR +print (un)compressed file sizes +.TP +\fB\-o\fR, \fB\-\-output=\fR<file> +write to <file>, keep input files +.TP +\fB\-q\fR, \fB\-\-quiet\fR +suppress all messages +.TP +\fB\-t\fR, \fB\-\-test\fR +test compressed file integrity +.TP +\fB\-u\fR, \fB\-\-buffer\-size=\fR<bytes> +set output buffer size in bytes +.TP +\fB\-v\fR, \fB\-\-verbose\fR +be verbose (a 2nd \fB\-v\fR gives more) +.TP +\fB\-\-empty\-error\fR +exit with error status if empty member in file +.TP +\fB\-\-marking\-error\fR +exit with error status if 1st LZMA byte not 0 +.TP +\fB\-\-loose\-trailing\fR +allow trailing data seeming corrupt header +.PP +If no file names are given, or if a file is '\-', lunzip decompresses +from standard input to standard output. +Numbers may be followed by a multiplier: k = kB = 10^3 = 1000, +Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc... +Buffer sizes 12 to 29 are interpreted as powers of two, meaning 2^12 to +2^29 bytes. +.PP +To extract all the files from archive 'foo.tar.lz', use the commands +\&'tar \fB\-xf\fR foo.tar.lz' or 'lunzip \fB\-cd\fR foo.tar.lz | tar \fB\-xf\fR \-'. +.PP +Exit status: 0 for a normal exit, 1 for environmental problems +(file not found, invalid command\-line options, I/O errors, etc), 2 to +indicate a corrupt or invalid input file, 3 for an internal consistency +error (e.g., bug) which caused lunzip to panic. +.PP +The ideas embodied in lunzip are due to (at least) the following people: +Abraham Lempel and Jacob Ziv (for the LZ algorithm), Andrei Markov (for the +definition of Markov chains), G.N.N. Martin (for the definition of range +encoding), Igor Pavlov (for putting all the above together in LZMA), and +Julian Seward (for bzip2's CLI). +.SH "REPORTING BUGS" +Report bugs to lzip\-bug@nongnu.org +.br +Lunzip home page: http://www.nongnu.org/lzip/lunzip.html +.SH COPYRIGHT +Copyright \(co 2024 Antonio Diaz Diaz. +License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html> +.br +This is free software: you are free to change and redistribute it. +There is NO WARRANTY, to the extent permitted by law. @@ -0,0 +1,112 @@ +/* Lunzip - Decompressor for the lzip format + Copyright (C) 2010-2024 Antonio Diaz Diaz. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#define _FILE_OFFSET_BITS 64 + +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <sys/stat.h> + +#include "lzip.h" +#include "lzip_index.h" + + +static void list_line( const unsigned long long uncomp_size, + const unsigned long long comp_size, + const char * const input_filename ) + { + if( uncomp_size > 0 ) + printf( "%14llu %14llu %6.2f%% %s\n", uncomp_size, comp_size, + 100.0 - ( ( 100.0 * comp_size ) / uncomp_size ), + input_filename ); + else + printf( "%14llu %14llu -INF%% %s\n", uncomp_size, comp_size, + input_filename ); + } + + +int list_files( const char * const filenames[], const int num_filenames, + const struct Cl_options * const cl_opts ) + { + unsigned long long total_comp = 0, total_uncomp = 0; + int files = 0, retval = 0; + int i; + bool first_post = true; + bool stdin_used = false; + + for( i = 0; i < num_filenames; ++i ) + { + const bool from_stdin = ( strcmp( filenames[i], "-" ) == 0 ); + if( from_stdin ) { if( stdin_used ) continue; else stdin_used = true; } + const char * const input_filename = from_stdin ? "(stdin)" : filenames[i]; + struct stat in_stats; /* not used */ + const int infd = from_stdin ? STDIN_FILENO : + open_instream( input_filename, &in_stats, false, true ); + if( infd < 0 ) { set_retval( &retval, 1 ); continue; } + + struct Lzip_index lzip_index; + Li_init( &lzip_index, infd, cl_opts ); + close( infd ); + if( lzip_index.retval != 0 ) + { + show_file_error( input_filename, lzip_index.error, 0 ); + set_retval( &retval, lzip_index.retval ); + Li_free( &lzip_index ); continue; + } + if( verbosity < 0 ) { Li_free( &lzip_index ); continue; } + const unsigned long long udata_size = Li_udata_size( &lzip_index ); + const unsigned long long cdata_size = Li_cdata_size( &lzip_index ); + total_comp += cdata_size; total_uncomp += udata_size; ++files; + const long members = lzip_index.members; + if( first_post ) + { + first_post = false; + if( verbosity >= 1 ) fputs( " dict memb trail ", stdout ); + fputs( " uncompressed compressed saved name\n", stdout ); + } + if( verbosity >= 1 ) + printf( "%s %5ld %6lld ", format_ds( lzip_index.dictionary_size ), + members, Li_file_size( &lzip_index ) - cdata_size ); + list_line( udata_size, cdata_size, input_filename ); + + if( verbosity >= 2 && members > 1 ) + { + long i; + fputs( " member data_pos data_size member_pos member_size\n", stdout ); + for( i = 0; i < members; ++i ) + { + const struct Block * db = Li_dblock( &lzip_index, i ); + const struct Block * mb = Li_mblock( &lzip_index, i ); + printf( "%6ld %14llu %14llu %14llu %14llu\n", + i + 1, db->pos, db->size, mb->pos, mb->size ); + } + first_post = true; /* reprint heading after list of members */ + } + fflush( stdout ); + Li_free( &lzip_index ); + } + if( verbosity >= 0 && files > 1 ) + { + if( verbosity >= 1 ) fputs( " ", stdout ); + list_line( total_uncomp, total_comp, "(totals)" ); + fflush( stdout ); + } + return retval; + } @@ -0,0 +1,289 @@ +/* Lunzip - Decompressor for the lzip format + Copyright (C) 2010-2024 Antonio Diaz Diaz. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef max + #define max(x,y) ((x) >= (y) ? (x) : (y)) +#endif +#ifndef min + #define min(x,y) ((x) <= (y) ? (x) : (y)) +#endif + +typedef int State; + +enum { states = 12 }; +static inline bool St_is_char( const State st ) { return st < 7; } + +static inline State St_set_char( const State st ) + { + static const State next[states] = { 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 4, 5 }; + return next[st]; + } +static inline State St_set_match( const State st ) + { return ( st < 7 ) ? 7 : 10; } +static inline State St_set_rep( const State st ) + { return ( st < 7 ) ? 8 : 11; } +static inline State St_set_short_rep( const State st ) + { return ( st < 7 ) ? 9 : 11; } + + +enum { + min_dictionary_bits = 12, + min_dictionary_size = 1 << min_dictionary_bits, /* >= modeled_distances */ + max_dictionary_bits = 29, + max_dictionary_size = 1 << max_dictionary_bits, + min_member_size = 36, + literal_context_bits = 3, + literal_pos_state_bits = 0, /* not used */ + pos_state_bits = 2, + pos_states = 1 << pos_state_bits, + pos_state_mask = pos_states - 1, + + len_states = 4, + dis_slot_bits = 6, + start_dis_model = 4, + end_dis_model = 14, + modeled_distances = 1 << ( end_dis_model / 2 ), /* 128 */ + dis_align_bits = 4, + dis_align_size = 1 << dis_align_bits, + + len_low_bits = 3, + len_mid_bits = 3, + len_high_bits = 8, + len_low_symbols = 1 << len_low_bits, + len_mid_symbols = 1 << len_mid_bits, + len_high_symbols = 1 << len_high_bits, + max_len_symbols = len_low_symbols + len_mid_symbols + len_high_symbols, + + min_match_len = 2, /* must be 2 */ + max_match_len = min_match_len + max_len_symbols - 1, /* 273 */ + min_match_len_limit = 5 }; + +static inline int get_len_state( const int len ) + { return min( len - min_match_len, len_states - 1 ); } + +static inline int get_lit_state( const uint8_t prev_byte ) + { return prev_byte >> ( 8 - literal_context_bits ); } + + +enum { bit_model_move_bits = 5, + bit_model_total_bits = 11, + bit_model_total = 1 << bit_model_total_bits }; + +typedef int Bit_model; + +static inline void Bm_init( Bit_model * const probability ) + { *probability = bit_model_total / 2; } + +static inline void Bm_array_init( Bit_model bm[], const int size ) + { int i; for( i = 0; i < size; ++i ) Bm_init( &bm[i] ); } + +struct Len_model + { + Bit_model choice1; + Bit_model choice2; + Bit_model bm_low[pos_states][len_low_symbols]; + Bit_model bm_mid[pos_states][len_mid_symbols]; + Bit_model bm_high[len_high_symbols]; + }; + +static inline void Lm_init( struct Len_model * const lm ) + { + Bm_init( &lm->choice1 ); + Bm_init( &lm->choice2 ); + Bm_array_init( lm->bm_low[0], pos_states * len_low_symbols ); + Bm_array_init( lm->bm_mid[0], pos_states * len_mid_symbols ); + Bm_array_init( lm->bm_high, len_high_symbols ); + } + + +typedef uint32_t CRC32[256]; /* Table of CRCs of all 8-bit messages. */ + +extern CRC32 crc32; + +static inline void CRC32_init( void ) + { + unsigned n; + for( n = 0; n < 256; ++n ) + { + unsigned c = n; + int k; + for( k = 0; k < 8; ++k ) + { if( c & 1 ) c = 0xEDB88320U ^ ( c >> 1 ); else c >>= 1; } + crc32[n] = c; + } + } + +/* about as fast as it is possible without messing with endianness */ +static inline void CRC32_update_buf( uint32_t * const crc, + const uint8_t * const buffer, + const int size ) + { + int i; + uint32_t c = *crc; + for( i = 0; i < size; ++i ) + c = crc32[(c^buffer[i])&0xFF] ^ ( c >> 8 ); + *crc = c; + } + + +static inline bool isvalid_ds( const unsigned dictionary_size ) + { return dictionary_size >= min_dictionary_size && + dictionary_size <= max_dictionary_size; } + + +static const uint8_t lzip_magic[4] = { 0x4C, 0x5A, 0x49, 0x50 }; /* "LZIP" */ + +enum { Lh_size = 6 }; +typedef uint8_t Lzip_header[Lh_size]; /* 0-3 magic bytes */ + /* 4 version */ + /* 5 coded dictionary size */ + +static inline bool Lh_check_magic( const Lzip_header data ) + { return memcmp( data, lzip_magic, 4 ) == 0; } + +/* detect (truncated) header */ +static inline bool Lh_check_prefix( const Lzip_header data, const int sz ) + { + int i; for( i = 0; i < sz && i < 4; ++i ) + if( data[i] != lzip_magic[i] ) return false; + return sz > 0; + } + +/* detect corrupt header */ +static inline bool Lh_check_corrupt( const Lzip_header data ) + { + int matches = 0; + int i; for( i = 0; i < 4; ++i ) + if( data[i] == lzip_magic[i] ) ++matches; + return matches > 1 && matches < 4; + } + +static inline uint8_t Lh_version( const Lzip_header data ) + { return data[4]; } + +static inline bool Lh_check_version( const Lzip_header data ) + { return data[4] == 1; } + +static inline unsigned Lh_get_dictionary_size( const Lzip_header data ) + { + unsigned sz = 1 << ( data[5] & 0x1F ); + if( sz > min_dictionary_size ) + sz -= ( sz / 16 ) * ( ( data[5] >> 5 ) & 7 ); + return sz; + } + +static inline bool Lh_check( const Lzip_header data ) + { + return Lh_check_magic( data ) && Lh_check_version( data ) && + isvalid_ds( Lh_get_dictionary_size( data ) ); + } + + +enum { Lt_size = 20 }; +typedef uint8_t Lzip_trailer[Lt_size]; + /* 0-3 CRC32 of the uncompressed data */ + /* 4-11 size of the uncompressed data */ + /* 12-19 member size including header and trailer */ + +static inline unsigned Lt_get_data_crc( const Lzip_trailer data ) + { + unsigned tmp = 0; + int i; for( i = 3; i >= 0; --i ) { tmp <<= 8; tmp += data[i]; } + return tmp; + } + +static inline unsigned long long Lt_get_data_size( const Lzip_trailer data ) + { + unsigned long long tmp = 0; + int i; for( i = 11; i >= 4; --i ) { tmp <<= 8; tmp += data[i]; } + return tmp; + } + +static inline unsigned long long Lt_get_member_size( const Lzip_trailer data ) + { + unsigned long long tmp = 0; + int i; for( i = 19; i >= 12; --i ) { tmp <<= 8; tmp += data[i]; } + return tmp; + } + +/* check internal consistency */ +static inline bool Lt_check_consistency( const Lzip_trailer data ) + { + const unsigned crc = Lt_get_data_crc( data ); + const unsigned long long dsize = Lt_get_data_size( data ); + if( ( crc == 0 ) != ( dsize == 0 ) ) return false; + const unsigned long long msize = Lt_get_member_size( data ); + if( msize < min_member_size ) return false; + const unsigned long long mlimit = ( 9 * dsize + 7 ) / 8 + min_member_size; + if( mlimit > dsize && msize > mlimit ) return false; + const unsigned long long dlimit = 7090 * ( msize - 26 ) - 1; + if( dlimit > msize && dsize > dlimit ) return false; + return true; + } + + +struct Cl_options /* command-line options */ + { + bool ignore_empty; + bool ignore_marking; + bool ignore_trailing; + bool loose_trailing; + }; + +static inline void Cl_options_init( struct Cl_options * cl_opts ) + { cl_opts->ignore_empty = true; cl_opts->ignore_marking = true; + cl_opts->ignore_trailing = true; cl_opts->loose_trailing = false; } + + +static inline void set_retval( int * retval, const int new_val ) + { if( *retval < new_val ) *retval = new_val; } + +static const char * const bad_magic_msg = "Bad magic number (file not in lzip format)."; +static const char * const bad_dict_msg = "Invalid dictionary size in member header."; +static const char * const corrupt_mm_msg = "Corrupt header in multimember file."; +static const char * const empty_msg = "Empty member not allowed."; +static const char * const marking_msg = "Marking data not allowed."; +static const char * const trailing_msg = "Trailing data not allowed."; +static const char * const mem_msg = "Not enough memory."; + +/* defined in decoder.c */ +int readblock( const int fd, uint8_t * const buf, const int size ); + +/* defined in list.c */ +int list_files( const char * const filenames[], const int num_filenames, + const struct Cl_options * const cl_opts ); + +/* defined in main.c */ +struct stat; +struct Pretty_print; +extern int verbosity; +void * resize_buffer( void * buf, const unsigned min_size ); +void Pp_show_msg( struct Pretty_print * const pp, const char * const msg ); +const char * bad_version( const unsigned version ); +const char * format_ds( const unsigned dictionary_size ); +void show_header( const unsigned dictionary_size ); +int open_instream( const char * const name, struct stat * const in_statsp, + const bool one_to_one, const bool reg_only ); +void cleanup_and_fail( const int retval ); +void show_error( const char * const msg, const int errcode, const bool help ); +void show_file_error( const char * const filename, const char * const msg, + const int errcode ); +struct Range_decoder; +void show_dprogress( const unsigned long long cfile_size, + const unsigned long long partial_size, + const struct Range_decoder * const d, + struct Pretty_print * const p ); diff --git a/lzip_index.c b/lzip_index.c new file mode 100644 index 0000000..ef0b0bd --- /dev/null +++ b/lzip_index.c @@ -0,0 +1,289 @@ +/* Lunzip - Decompressor for the lzip format + Copyright (C) 2010-2024 Antonio Diaz Diaz. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#define _FILE_OFFSET_BITS 64 + +#include <errno.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "lzip.h" +#include "lzip_index.h" + + +static int seek_read( const int fd, uint8_t * const buf, const int size, + const long long pos ) + { + if( lseek( fd, pos, SEEK_SET ) == pos ) + return readblock( fd, buf, size ); + return 0; + } + + +static bool add_error( struct Lzip_index * const li, const char * const msg ) + { + const int len = strlen( msg ); + void * tmp = resize_buffer( li->error, li->error_size + len + 1 ); + if( !tmp ) return false; + li->error = (char *)tmp; + strncpy( li->error + li->error_size, msg, len + 1 ); + li->error_size += len; + return true; + } + + +static bool push_back_member( struct Lzip_index * const li, + const long long dp, const long long ds, + const long long mp, const long long ms, + const unsigned dict_size ) + { + struct Member * p; + void * tmp = resize_buffer( li->member_vector, + ( li->members + 1 ) * sizeof li->member_vector[0] ); + if( !tmp ) { add_error( li, mem_msg ); li->retval = 1; return false; } + li->member_vector = (struct Member *)tmp; + p = &(li->member_vector[li->members]); + init_member( p, dp, ds, mp, ms, dict_size ); + ++li->members; + return true; + } + + +static void Li_free_member_vector( struct Lzip_index * const li ) + { + if( li->member_vector ) + { free( li->member_vector ); li->member_vector = 0; } + li->members = 0; + } + + +static void Li_reverse_member_vector( struct Lzip_index * const li ) + { + struct Member tmp; + long i; + for( i = 0; i < li->members / 2; ++i ) + { + tmp = li->member_vector[i]; + li->member_vector[i] = li->member_vector[li->members-i-1]; + li->member_vector[li->members-i-1] = tmp; + } + } + + +static bool Li_check_header( struct Lzip_index * const li, + const Lzip_header header ) + { + if( !Lh_check_magic( header ) ) + { add_error( li, bad_magic_msg ); li->retval = 2; return false; } + if( !Lh_check_version( header ) ) + { add_error( li, bad_version( Lh_version( header ) ) ); li->retval = 2; + return false; } + if( !isvalid_ds( Lh_get_dictionary_size( header ) ) ) + { add_error( li, bad_dict_msg ); li->retval = 2; return false; } + return true; + } + +static void Li_set_errno_error( struct Lzip_index * const li, + const char * const msg ) + { + add_error( li, msg ); add_error( li, strerror( errno ) ); + li->retval = 1; + } + +static void Li_set_num_error( struct Lzip_index * const li, + const char * const msg, unsigned long long num ) + { + char buf[80]; + snprintf( buf, sizeof buf, "%s%llu", msg, num ); + add_error( li, buf ); + li->retval = 2; + } + + +static bool Li_read_header( struct Lzip_index * const li, const int fd, + Lzip_header header, const long long pos, const bool ignore_marking ) + { + if( seek_read( fd, header, Lh_size, pos ) != Lh_size ) + { Li_set_errno_error( li, "Error reading member header: " ); return false; } + uint8_t byte; + if( !ignore_marking && readblock( fd, &byte, 1 ) == 1 && byte != 0 ) + { add_error( li, marking_msg ); li->retval = 2; return false; } + return true; + } + + +/* If successful, push last member and set pos to member header. */ +static bool Li_skip_trailing_data( struct Lzip_index * const li, const int fd, + unsigned long long * const pos, + const struct Cl_options * const cl_opts ) + { + if( *pos < min_member_size ) return false; + enum { block_size = 16384, + buffer_size = block_size + Lt_size - 1 + Lh_size }; + uint8_t buffer[buffer_size]; + int bsize = *pos % block_size; /* total bytes in buffer */ + if( bsize <= buffer_size - block_size ) bsize += block_size; + int search_size = bsize; /* bytes to search for trailer */ + int rd_size = bsize; /* bytes to read from file */ + unsigned long long ipos = *pos - rd_size; /* aligned to block_size */ + + while( true ) + { + if( seek_read( fd, buffer, rd_size, ipos ) != rd_size ) + { Li_set_errno_error( li, "Error seeking member trailer: " ); return false; } + const uint8_t max_msb = ( ipos + search_size ) >> 56; + int i; + for( i = search_size; i >= Lt_size; --i ) + if( buffer[i-1] <= max_msb ) /* most significant byte of member_size */ + { + const Lzip_trailer * const trailer = + (const Lzip_trailer *)( buffer + i - Lt_size ); + const unsigned long long member_size = Lt_get_member_size( *trailer ); + if( member_size == 0 ) /* skip trailing zeros */ + { while( i > Lt_size && buffer[i-9] == 0 ) --i; continue; } + if( member_size > ipos + i || !Lt_check_consistency( *trailer ) ) + continue; + Lzip_header header; + if( !Li_read_header( li, fd, header, ipos + i - member_size, + cl_opts->ignore_marking ) ) return false; + if( !Lh_check( header ) ) continue; + const Lzip_header * header2 = (const Lzip_header *)( buffer + i ); + const bool full_h2 = bsize - i >= Lh_size; + if( Lh_check_prefix( *header2, bsize - i ) ) /* last member */ + { + if( !full_h2 ) add_error( li, "Last member in input file is truncated." ); + else if( Li_check_header( li, *header2 ) ) + add_error( li, "Last member in input file is truncated or corrupt." ); + li->retval = 2; return false; + } + if( !cl_opts->loose_trailing && full_h2 && Lh_check_corrupt( *header2 ) ) + { add_error( li, corrupt_mm_msg ); li->retval = 2; return false; } + if( !cl_opts->ignore_trailing ) + { add_error( li, trailing_msg ); li->retval = 2; return false; } + const unsigned long long data_size = Lt_get_data_size( *trailer ); + if( !cl_opts->ignore_empty && data_size == 0 ) + { add_error( li, empty_msg ); li->retval = 2; return false; } + *pos = ipos + i - member_size; /* good member */ + const unsigned dictionary_size = Lh_get_dictionary_size( header ); + if( li->dictionary_size < dictionary_size ) + li->dictionary_size = dictionary_size; + return push_back_member( li, 0, data_size, *pos, member_size, + dictionary_size ); + } + if( ipos == 0 ) + { Li_set_num_error( li, "Bad trailer at pos ", *pos - Lt_size ); + return false; } + bsize = buffer_size; + search_size = bsize - Lh_size; + rd_size = block_size; + ipos -= rd_size; + memcpy( buffer + rd_size, buffer, buffer_size - rd_size ); + } + } + + +bool Li_init( struct Lzip_index * const li, const int infd, + const struct Cl_options * const cl_opts ) + { + li->member_vector = 0; + li->error = 0; + li->insize = lseek( infd, 0, SEEK_END ); + li->members = 0; + li->error_size = 0; + li->retval = 0; + li->dictionary_size = 0; + if( li->insize < 0 ) + { Li_set_errno_error( li, "Input file is not seekable: " ); return false; } + if( li->insize < min_member_size ) + { add_error( li, "Input file is too short." ); li->retval = 2; + return false; } + if( li->insize > INT64_MAX ) + { add_error( li, "Input file is too long (2^63 bytes or more)." ); + li->retval = 2; return false; } + + Lzip_header header; + if( !Li_read_header( li, infd, header, 0, cl_opts->ignore_marking ) || + !Li_check_header( li, header ) ) return false; + + unsigned long long pos = li->insize; /* always points to a header or to EOF */ + while( pos >= min_member_size ) + { + Lzip_trailer trailer; + if( seek_read( infd, trailer, Lt_size, pos - Lt_size ) != Lt_size ) + { Li_set_errno_error( li, "Error reading member trailer: " ); break; } + const unsigned long long member_size = Lt_get_member_size( trailer ); + if( member_size > pos || !Lt_check_consistency( trailer ) ) + { /* bad trailer */ + if( li->members <= 0 ) + { if( Li_skip_trailing_data( li, infd, &pos, cl_opts ) ) continue; + return false; } + Li_set_num_error( li, "Bad trailer at pos ", pos - Lt_size ); break; + } + if( !Li_read_header( li, infd, header, pos - member_size, + cl_opts->ignore_marking ) ) break; + if( !Lh_check( header ) ) /* bad header */ + { + if( li->members <= 0 ) + { if( Li_skip_trailing_data( li, infd, &pos, cl_opts ) ) continue; + return false; } + Li_set_num_error( li, "Bad header at pos ", pos - member_size ); break; + } + const unsigned long long data_size = Lt_get_data_size( trailer ); + if( !cl_opts->ignore_empty && data_size == 0 ) + { add_error( li, empty_msg ); li->retval = 2; break; } + pos -= member_size; /* good member */ + const unsigned dictionary_size = Lh_get_dictionary_size( header ); + if( li->dictionary_size < dictionary_size ) + li->dictionary_size = dictionary_size; + if( !push_back_member( li, 0, data_size, pos, member_size, + dictionary_size ) ) return false; + } + if( pos != 0 || li->members <= 0 || li->retval != 0 ) + { + Li_free_member_vector( li ); + if( li->retval == 0 ) + { add_error( li, "Can't create file index." ); li->retval = 2; } + return false; + } + Li_reverse_member_vector( li ); + long i; + for( i = 0; ; ++i ) + { + const long long end = block_end( li->member_vector[i].dblock ); + if( end < 0 || end > INT64_MAX ) + { + Li_free_member_vector( li ); + add_error( li, "Data in input file is too long (2^63 bytes or more)." ); + li->retval = 2; return false; + } + if( i + 1 >= li->members ) break; + li->member_vector[i+1].dblock.pos = end; + } + return true; + } + + +void Li_free( struct Lzip_index * const li ) + { + Li_free_member_vector( li ); + if( li->error ) { free( li->error ); li->error = 0; } + li->error_size = 0; + } diff --git a/lzip_index.h b/lzip_index.h new file mode 100644 index 0000000..a4fbd56 --- /dev/null +++ b/lzip_index.h @@ -0,0 +1,91 @@ +/* Lunzip - Decompressor for the lzip format + Copyright (C) 2010-2024 Antonio Diaz Diaz. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef INT64_MAX +#define INT64_MAX 0x7FFFFFFFFFFFFFFFLL +#endif + + +struct Block + { + long long pos, size; /* pos >= 0, size >= 0, pos + size <= INT64_MAX */ + }; + +static inline void init_block( struct Block * const b, + const long long p, const long long s ) + { b->pos = p; b->size = s; } + +static inline long long block_end( const struct Block b ) + { return b.pos + b.size; } + + +struct Member + { + struct Block dblock, mblock; /* data block, member block */ + unsigned dictionary_size; + }; + +static inline void init_member( struct Member * const m, + const long long dpos, const long long dsize, + const long long mpos, const long long msize, + const unsigned dict_size ) + { init_block( &m->dblock, dpos, dsize ); init_block( &m->mblock, mpos, msize ); + m->dictionary_size = dict_size; } + +struct Lzip_index + { + struct Member * member_vector; + char * error; + long long insize; + long members; + int error_size; + int retval; + unsigned dictionary_size; /* largest dictionary size in the file */ + }; + +bool Li_init( struct Lzip_index * const li, const int infd, + const struct Cl_options * const cl_opts ); + +void Li_free( struct Lzip_index * const li ); + +static inline long long Li_udata_size( const struct Lzip_index * const li ) + { + if( li->members <= 0 ) return 0; + return block_end( li->member_vector[li->members-1].dblock ); + } + +static inline long long Li_cdata_size( const struct Lzip_index * const li ) + { + if( li->members <= 0 ) return 0; + return block_end( li->member_vector[li->members-1].mblock ); + } + + /* total size including trailing data (if any) */ +static inline long long Li_file_size( const struct Lzip_index * const li ) + { if( li->insize >= 0 ) return li->insize; else return 0; } + +static inline const struct Block * Li_dblock( const struct Lzip_index * const li, + const long i ) + { return &li->member_vector[i].dblock; } + +static inline const struct Block * Li_mblock( const struct Lzip_index * const li, + const long i ) + { return &li->member_vector[i].mblock; } + +static inline unsigned Li_dictionary_size( const struct Lzip_index * const li, + const long i ) + { return li->member_vector[i].dictionary_size; } @@ -0,0 +1,996 @@ +/* Lunzip - Decompressor for the lzip format + Copyright (C) 2010-2024 Antonio Diaz Diaz. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ +/* + Exit status: 0 for a normal exit, 1 for environmental problems + (file not found, invalid command-line options, I/O errors, etc), 2 to + indicate a corrupt or invalid input file, 3 for an internal consistency + error (e.g., bug) which caused lunzip to panic. +*/ + +#define _FILE_OFFSET_BITS 64 + +#include <ctype.h> +#include <errno.h> +#include <fcntl.h> +#include <limits.h> /* SSIZE_MAX */ +#include <signal.h> +#include <stdbool.h> +#include <stdint.h> /* SIZE_MAX */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <utime.h> +#include <sys/stat.h> +#if defined __MSVCRT__ || defined __OS2__ || defined __DJGPP__ +#include <io.h> +#if defined __MSVCRT__ +#define fchmod(x,y) 0 +#define fchown(x,y,z) 0 +#define SIGHUP SIGTERM +#define S_ISSOCK(x) 0 +#ifndef S_IRGRP +#define S_IRGRP 0 +#define S_IWGRP 0 +#define S_IROTH 0 +#define S_IWOTH 0 +#endif +#endif +#if defined __DJGPP__ +#define S_ISSOCK(x) 0 +#define S_ISVTX 0 +#endif +#endif + +#include "carg_parser.h" +#include "lzip.h" +#include "decoder.h" + +#ifndef O_BINARY +#define O_BINARY 0 +#endif + +#if CHAR_BIT != 8 +#error "Environments where CHAR_BIT != 8 are not supported." +#endif + +#if ( defined SIZE_MAX && SIZE_MAX < UINT_MAX ) || \ + ( defined SSIZE_MAX && SSIZE_MAX < INT_MAX ) +#error "Environments where 'size_t' is narrower than 'int' are not supported." +#endif + +int verbosity = 0; + +static const char * const program_name = "lunzip"; +static const char * const program_year = "2024"; +static const char * invocation_name = "lunzip"; /* default value */ + +static const struct { const char * from; const char * to; } known_extensions[] = { + { ".lz", "" }, + { ".tlz", ".tar" }, + { 0, 0 } }; + +enum Mode { m_compress, m_decompress, m_list, m_test }; + +/* Variables used in signal handler context. + They are not declared volatile because the handler never returns. */ +static char * output_filename = 0; +static int outfd = -1; +static bool delete_output_on_interrupt = false; + + +static void show_help( void ) + { + printf( "Lunzip is a decompressor for the lzip format written in C. Its small size\n" + "makes it well suited for embedded devices or software installers that need\n" + "to decompress files but don't need compression capabilities. Lunzip is\n" + "compatible with lzip 1.4 or newer.\n" + "\nLzip is a lossless data compressor with a user interface similar to the one\n" + "of gzip or bzip2. Lzip uses a simplified form of the 'Lempel-Ziv-Markov\n" + "chain-Algorithm' (LZMA) stream format to maximize interoperability. The\n" + "maximum dictionary size is 512 MiB so that any lzip file can be decompressed\n" + "on 32-bit machines. Lzip provides accurate and robust 3-factor integrity\n" + "checking. Lzip can compress about as fast as gzip (lzip -0) or compress most\n" + "files more than bzip2 (lzip -9). Decompression speed is intermediate between\n" + "gzip and bzip2. Lzip is better than gzip and bzip2 from a data recovery\n" + "perspective. Lzip has been designed, written, and tested with great care to\n" + "replace gzip and bzip2 as the standard general-purpose compressed format for\n" + "Unix-like systems.\n" + "\nLunzip provides a 'low memory' mode able to decompress any file using as\n" + "little memory as 50 kB, irrespective of the dictionary size used to\n" + "compress the file. To activate it, specify the size of the output buffer\n" + "with the option --buffer-size and lunzip will use the decompressed\n" + "file as dictionary for distances beyond the buffer size. Of course, the\n" + "larger the difference between the buffer size and the dictionary size, the\n" + "more accesses to disk are needed and the slower the decompression is.\n" + "This 'low memory' mode only works when decompressing to a regular file\n" + "and is intended for systems without enough memory (RAM + swap) to keep\n" + "the whole dictionary at once.\n" + "\nUsage: %s [options] [files]\n", invocation_name ); + printf( "\nOptions:\n" + " -h, --help display this help and exit\n" + " -V, --version output version information and exit\n" + " -a, --trailing-error exit with error status if trailing data\n" + " -c, --stdout write to standard output, keep input files\n" + " -d, --decompress decompress (this is the default)\n" + " -f, --force overwrite existing output files\n" + " -k, --keep keep (don't delete) input files\n" + " -l, --list print (un)compressed file sizes\n" + " -o, --output=<file> write to <file>, keep input files\n" + " -q, --quiet suppress all messages\n" + " -t, --test test compressed file integrity\n" + " -u, --buffer-size=<bytes> set output buffer size in bytes\n" + " -v, --verbose be verbose (a 2nd -v gives more)\n" + " --empty-error exit with error status if empty member in file\n" + " --marking-error exit with error status if 1st LZMA byte not 0\n" + " --loose-trailing allow trailing data seeming corrupt header\n" + "\nIf no file names are given, or if a file is '-', lunzip decompresses\n" + "from standard input to standard output.\n" + "Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,\n" + "Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...\n" + "Buffer sizes 12 to 29 are interpreted as powers of two, meaning 2^12 to\n" + "2^29 bytes.\n" + "\nTo extract all the files from archive 'foo.tar.lz', use the commands\n" + "'tar -xf foo.tar.lz' or 'lunzip -cd foo.tar.lz | tar -xf -'.\n" + "\nExit status: 0 for a normal exit, 1 for environmental problems\n" + "(file not found, invalid command-line options, I/O errors, etc), 2 to\n" + "indicate a corrupt or invalid input file, 3 for an internal consistency\n" + "error (e.g., bug) which caused lunzip to panic.\n" + "\nThe ideas embodied in lunzip are due to (at least) the following people:\n" + "Abraham Lempel and Jacob Ziv (for the LZ algorithm), Andrei Markov (for the\n" + "definition of Markov chains), G.N.N. Martin (for the definition of range\n" + "encoding), Igor Pavlov (for putting all the above together in LZMA), and\n" + "Julian Seward (for bzip2's CLI).\n" + "\nReport bugs to lzip-bug@nongnu.org\n" + "Lunzip home page: http://www.nongnu.org/lzip/lunzip.html\n" ); + } + + +static void show_version( void ) + { + printf( "%s %s\n", program_name, PROGVERSION ); + printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year ); + printf( "License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>\n" + "This is free software: you are free to change and redistribute it.\n" + "There is NO WARRANTY, to the extent permitted by law.\n" ); + } + + +/* assure at least a minimum size for buffer 'buf' */ +void * resize_buffer( void * buf, const unsigned min_size ) + { + if( buf ) buf = realloc( buf, min_size ); + else buf = malloc( min_size ); + if( !buf ) { show_error( mem_msg, 0, false ); cleanup_and_fail( 1 ); } + return buf; + } + + +struct Pretty_print + { + const char * name; + char * padded_name; + const char * stdin_name; + unsigned longest_name; + bool first_post; + }; + +static void Pp_init( struct Pretty_print * const pp, + const char * const filenames[], const int num_filenames ) + { + pp->name = 0; + pp->padded_name = 0; + pp->stdin_name = "(stdin)"; + pp->longest_name = 0; + pp->first_post = false; + + if( verbosity <= 0 ) return; + const unsigned stdin_name_len = strlen( pp->stdin_name ); + int i; + for( i = 0; i < num_filenames; ++i ) + { + const char * const s = filenames[i]; + const unsigned len = (strcmp( s, "-" ) == 0) ? stdin_name_len : strlen( s ); + if( pp->longest_name < len ) pp->longest_name = len; + } + if( pp->longest_name == 0 ) pp->longest_name = stdin_name_len; + } + +static void Pp_set_name( struct Pretty_print * const pp, + const char * const filename ) + { + unsigned name_len, padded_name_len, i = 0; + + if( filename && filename[0] && strcmp( filename, "-" ) != 0 ) + pp->name = filename; + else pp->name = pp->stdin_name; + name_len = strlen( pp->name ); + padded_name_len = max( name_len, pp->longest_name ) + 4; + pp->padded_name = resize_buffer( pp->padded_name, padded_name_len + 1 ); + while( i < 2 ) pp->padded_name[i++] = ' '; + while( i < name_len + 2 ) { pp->padded_name[i] = pp->name[i-2]; ++i; } + pp->padded_name[i++] = ':'; + while( i < padded_name_len ) pp->padded_name[i++] = ' '; + pp->padded_name[i] = 0; + pp->first_post = true; + } + +static void Pp_reset( struct Pretty_print * const pp ) + { if( pp->name && pp->name[0] ) pp->first_post = true; } + +void Pp_show_msg( struct Pretty_print * const pp, const char * const msg ) + { + if( verbosity < 0 ) return; + if( pp->first_post ) + { + pp->first_post = false; + fputs( pp->padded_name, stderr ); + if( !msg ) fflush( stderr ); + } + if( msg ) fprintf( stderr, "%s\n", msg ); + } + + +const char * bad_version( const unsigned version ) + { + static char buf[80]; + snprintf( buf, sizeof buf, "Version %u member format not supported.", + version ); + return buf; + } + + +const char * format_ds( const unsigned dictionary_size ) + { + enum { bufsize = 16, factor = 1024, n = 3 }; + static char buf[bufsize]; + const char * const prefix[n] = { "Ki", "Mi", "Gi" }; + const char * p = ""; + const char * np = " "; + unsigned num = dictionary_size; + bool exact = ( num % factor == 0 ); + + int i; for( i = 0; i < n && ( num > 9999 || ( exact && num >= factor ) ); ++i ) + { num /= factor; if( num % factor != 0 ) exact = false; + p = prefix[i]; np = ""; } + snprintf( buf, bufsize, "%s%4u %sB", np, num, p ); + return buf; + } + + +void show_header( const unsigned dictionary_size ) + { + fprintf( stderr, "dict %s, ", format_ds( dictionary_size ) ); + } + + +/* separate numbers of 5 or more digits in groups of 3 digits using '_' */ +static const char * format_num3( unsigned long long num ) + { + enum { buffers = 8, bufsize = 4 * sizeof num, n = 10 }; + const char * const si_prefix = "kMGTPEZYRQ"; + const char * const binary_prefix = "KMGTPEZYRQ"; + static char buffer[buffers][bufsize]; /* circle of static buffers for printf */ + static int current = 0; + int i; + char * const buf = buffer[current++]; current %= buffers; + char * p = buf + bufsize - 1; /* fill the buffer backwards */ + *p = 0; /* terminator */ + if( num > 1024 ) + { + char prefix = 0; /* try binary first, then si */ + for( i = 0; i < n && num != 0 && num % 1024 == 0; ++i ) + { num /= 1024; prefix = binary_prefix[i]; } + if( prefix ) *(--p) = 'i'; + else + for( i = 0; i < n && num != 0 && num % 1000 == 0; ++i ) + { num /= 1000; prefix = si_prefix[i]; } + if( prefix ) *(--p) = prefix; + } + const bool split = num >= 10000; + + for( i = 0; ; ) + { + *(--p) = num % 10 + '0'; num /= 10; if( num == 0 ) break; + if( split && ++i >= 3 ) { i = 0; *(--p) = '_'; } + } + return p; + } + + +void show_option_error( const char * const arg, const char * const msg, + const char * const option_name ) + { + if( verbosity >= 0 ) + fprintf( stderr, "%s: '%s': %s option '%s'.\n", + program_name, arg, msg, option_name ); + } + + +/* Recognized formats: <num>k, <num>Ki, <num>[MGTPEZYRQ][i] */ +static unsigned long getnum( const char * const arg, + const char * const option_name, + const unsigned long llimit, + const unsigned long ulimit ) + { + char * tail; + errno = 0; + unsigned long result = strtoul( arg, &tail, 0 ); + if( tail == arg ) + { show_option_error( arg, "Bad or missing numerical argument in", + option_name ); exit( 1 ); } + + if( !errno && tail[0] ) + { + const unsigned factor = ( tail[1] == 'i' ) ? 1024 : 1000; + int exponent = 0; /* 0 = bad multiplier */ + int i; + switch( tail[0] ) + { + case 'Q': exponent = 10; break; + case 'R': exponent = 9; break; + case 'Y': exponent = 8; break; + case 'Z': exponent = 7; break; + case 'E': exponent = 6; break; + case 'P': exponent = 5; break; + case 'T': exponent = 4; break; + case 'G': exponent = 3; break; + case 'M': exponent = 2; break; + case 'K': if( factor == 1024 ) exponent = 1; break; + case 'k': if( factor == 1000 ) exponent = 1; break; + } + if( exponent <= 0 ) + { show_option_error( arg, "Bad multiplier in numerical argument of", + option_name ); exit( 1 ); } + for( i = 0; i < exponent; ++i ) + { + if( ulimit / factor >= result ) result *= factor; + else { errno = ERANGE; break; } + } + } + if( !errno && ( result < llimit || result > ulimit ) ) errno = ERANGE; + if( errno ) + { + if( verbosity >= 0 ) + fprintf( stderr, "%s: '%s': Value out of limits [%s,%s] in " + "option '%s'.\n", program_name, arg, format_num3( llimit ), + format_num3( ulimit ), option_name ); + exit( 1 ); + } + return result; + } + + +static int get_dict_size( const char * const arg, const char * const option_name ) + { + char * tail; + const long bits = strtol( arg, &tail, 0 ); + if( bits >= min_dictionary_bits && + bits <= max_dictionary_bits && *tail == 0 ) + return 1 << bits; + return getnum( arg, option_name, min_dictionary_size, max_dictionary_size ); + } + + +static void set_mode( enum Mode * const program_modep, const enum Mode new_mode ) + { + if( *program_modep != m_compress && *program_modep != new_mode ) + { + show_error( "Only one operation can be specified.", 0, true ); + exit( 1 ); + } + *program_modep = new_mode; + } + + +static int extension_index( const char * const name ) + { + int eindex; + for( eindex = 0; known_extensions[eindex].from; ++eindex ) + { + const char * const ext = known_extensions[eindex].from; + const unsigned name_len = strlen( name ); + const unsigned ext_len = strlen( ext ); + if( name_len > ext_len && + strncmp( name + name_len - ext_len, ext, ext_len ) == 0 ) + return eindex; + } + return -1; + } + + +static void set_d_outname( const char * const name, const int eindex ) + { + const unsigned name_len = strlen( name ); + if( eindex >= 0 ) + { + const char * const from = known_extensions[eindex].from; + const unsigned from_len = strlen( from ); + if( name_len > from_len ) + { + output_filename = resize_buffer( output_filename, name_len + + strlen( known_extensions[eindex].to ) + 1 ); + strcpy( output_filename, name ); + strcpy( output_filename + name_len - from_len, known_extensions[eindex].to ); + return; + } + } + output_filename = resize_buffer( output_filename, name_len + 4 + 1 ); + strcpy( output_filename, name ); + strcat( output_filename, ".out" ); + if( verbosity >= 1 ) + fprintf( stderr, "%s: %s: Can't guess original name -- using '%s'\n", + program_name, name, output_filename ); + } + + +int open_instream( const char * const name, struct stat * const in_statsp, + const bool one_to_one, const bool reg_only ) + { + int infd = open( name, O_RDONLY | O_BINARY ); + if( infd < 0 ) + show_file_error( name, "Can't open input file", errno ); + else + { + const int i = fstat( infd, in_statsp ); + const mode_t mode = in_statsp->st_mode; + const bool can_read = ( i == 0 && !reg_only && + ( S_ISBLK( mode ) || S_ISCHR( mode ) || + S_ISFIFO( mode ) || S_ISSOCK( mode ) ) ); + if( i != 0 || ( !S_ISREG( mode ) && ( !can_read || one_to_one ) ) ) + { + if( verbosity >= 0 ) + fprintf( stderr, "%s: %s: Input file is not a regular file%s.\n", + program_name, name, ( can_read && one_to_one ) ? + ",\n and neither '-c' nor '-o' were specified" : "" ); + close( infd ); + infd = -1; + } + } + return infd; + } + + +static bool make_dirs( const char * const name ) + { + int i = strlen( name ); + while( i > 0 && name[i-1] != '/' ) --i; /* remove last component */ + while( i > 0 && name[i-1] == '/' ) --i; /* remove slash(es) */ + const int dirsize = i; /* size of dirname without trailing slash(es) */ + + for( i = 0; i < dirsize; ) /* if dirsize == 0, dirname is '/' or empty */ + { + while( i < dirsize && name[i] == '/' ) ++i; + const int first = i; + while( i < dirsize && name[i] != '/' ) ++i; + if( first < i ) + { + char partial[i+1]; memcpy( partial, name, i ); partial[i] = 0; + const mode_t mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH; + struct stat st; + if( stat( partial, &st ) == 0 ) + { if( !S_ISDIR( st.st_mode ) ) { errno = ENOTDIR; return false; } } + else if( mkdir( partial, mode ) != 0 && errno != EEXIST ) + return false; /* if EEXIST, another process created the dir */ + } + } + return true; + } + + +static bool open_outstream( const bool force, const bool protect ) + { + const mode_t usr_rw = S_IRUSR | S_IWUSR; + const mode_t all_rw = usr_rw | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH; + const mode_t outfd_mode = protect ? usr_rw : all_rw; + int flags = O_APPEND | O_CREAT | O_RDWR | O_BINARY; + if( force ) flags |= O_TRUNC; else flags |= O_EXCL; + + outfd = -1; + const int len = strlen( output_filename ); + if( len > 0 && output_filename[len-1] == '/' ) errno = EISDIR; + else { + if( !protect && !make_dirs( output_filename ) ) + { show_file_error( output_filename, + "Error creating intermediate directory", errno ); return false; } + outfd = open( output_filename, flags, outfd_mode ); + if( outfd >= 0 ) { delete_output_on_interrupt = true; return true; } + if( errno == EEXIST ) + { show_file_error( output_filename, + "Output file already exists, skipping.", 0 ); return false; } + } + show_file_error( output_filename, "Can't create output file", errno ); + return false; + } + + +static void set_signals( void (*action)(int) ) + { + signal( SIGHUP, action ); + signal( SIGINT, action ); + signal( SIGTERM, action ); + } + + +void cleanup_and_fail( const int retval ) + { + set_signals( SIG_IGN ); /* ignore signals */ + if( delete_output_on_interrupt ) + { + delete_output_on_interrupt = false; + show_file_error( output_filename, "Deleting output file, if it exists.", 0 ); + if( outfd >= 0 ) { close( outfd ); outfd = -1; } + if( remove( output_filename ) != 0 && errno != ENOENT ) + show_error( "warning: deletion of output file failed", errno, false ); + } + exit( retval ); + } + + +static void signal_handler( int sig ) + { + if( sig ) {} /* keep compiler happy */ + show_error( "Control-C or similar caught, quitting.", 0, false ); + cleanup_and_fail( 1 ); + } + + +static bool check_tty_in( const char * const input_filename, const int infd, + const enum Mode program_mode, int * const retval ) + { + if( isatty( infd ) ) /* for example /dev/tty */ + { show_file_error( input_filename, + "I won't read compressed data from a terminal.", 0 ); + close( infd ); set_retval( retval, 2 ); + if( program_mode != m_test ) cleanup_and_fail( *retval ); + return false; } + return true; + } + + +/* Set permissions, owner, and times. */ +static void close_and_set_permissions( const struct stat * const in_statsp ) + { + bool warning = false; + if( in_statsp ) + { + const mode_t mode = in_statsp->st_mode; + /* fchown in many cases returns with EPERM, which can be safely ignored. */ + if( fchown( outfd, in_statsp->st_uid, in_statsp->st_gid ) == 0 ) + { if( fchmod( outfd, mode ) != 0 ) warning = true; } + else + if( errno != EPERM || + fchmod( outfd, mode & ~( S_ISUID | S_ISGID | S_ISVTX ) ) != 0 ) + warning = true; + } + if( close( outfd ) != 0 ) + { show_file_error( output_filename, "Error closing output file", errno ); + cleanup_and_fail( 1 ); } + outfd = -1; + delete_output_on_interrupt = false; + if( in_statsp ) + { + struct utimbuf t; + t.actime = in_statsp->st_atime; + t.modtime = in_statsp->st_mtime; + if( utime( output_filename, &t ) != 0 ) warning = true; + } + if( warning && verbosity >= 1 ) + show_file_error( output_filename, + "warning: can't change output file attributes", errno ); + } + + +static unsigned char xdigit( const unsigned value ) /* hex digit for 'value' */ + { + if( value <= 9 ) return '0' + value; + if( value <= 15 ) return 'A' + value - 10; + return 0; + } + + +static bool show_trailing_data( const uint8_t * const data, const int size, + struct Pretty_print * const pp, const bool all, + const int ignore_trailing ) /* -1 = show */ + { + if( verbosity >= 4 || ignore_trailing <= 0 ) + { + int i; + char buf[80]; + unsigned len = max( 0, snprintf( buf, sizeof buf, "%strailing data = ", + all ? "" : "first bytes of " ) ); + for( i = 0; i < size && len + 2 < sizeof buf; ++i ) + { + buf[len++] = xdigit( data[i] >> 4 ); + buf[len++] = xdigit( data[i] & 0x0F ); + buf[len++] = ' '; + } + if( len < sizeof buf ) buf[len++] = '\''; + for( i = 0; i < size && len < sizeof buf; ++i ) + { if( isprint( data[i] ) ) buf[len++] = data[i]; else buf[len++] = '.'; } + if( len < sizeof buf ) buf[len++] = '\''; + if( len < sizeof buf ) buf[len] = 0; else buf[sizeof buf - 1] = 0; + Pp_show_msg( pp, buf ); + if( ignore_trailing == 0 ) show_file_error( pp->name, trailing_msg, 0 ); + } + return ignore_trailing > 0; + } + + +static int decompress( const unsigned long long cfile_size, const int infd, + const struct Cl_options * const cl_opts, + struct Pretty_print * const pp, + const unsigned buffer_size, const bool testing ) + { + unsigned long long partial_file_pos = 0; + struct Range_decoder rdec; + int retval = 0; + bool first_member; + if( !Rd_init( &rdec, infd ) ) + { show_error( mem_msg, 0, false ); cleanup_and_fail( 1 ); } + + for( first_member = true; ; first_member = false ) + { + Lzip_header header; + Rd_reset_member_position( &rdec ); + const int size = Rd_read_data( &rdec, header, Lh_size ); + if( Rd_finished( &rdec ) ) /* End Of File */ + { + if( first_member ) + { show_file_error( pp->name, "File ends unexpectedly at member header.", 0 ); + retval = 2; } + else if( Lh_check_prefix( header, size ) ) + { Pp_show_msg( pp, "Truncated header in multimember file." ); + show_trailing_data( header, size, pp, true, -1 ); retval = 2; } + else if( size > 0 && !show_trailing_data( header, size, pp, true, + cl_opts->ignore_trailing ) ) retval = 2; + break; + } + if( !Lh_check_magic( header ) ) + { + if( first_member ) + { show_file_error( pp->name, bad_magic_msg, 0 ); retval = 2; } + else if( !cl_opts->loose_trailing && Lh_check_corrupt( header ) ) + { Pp_show_msg( pp, corrupt_mm_msg ); + show_trailing_data( header, size, pp, false, -1 ); retval = 2; } + else if( !show_trailing_data( header, size, pp, false, + cl_opts->ignore_trailing ) ) retval = 2; + break; + } + if( !Lh_check_version( header ) ) + { Pp_show_msg( pp, bad_version( Lh_version( header ) ) ); + retval = 2; break; } + const unsigned dictionary_size = Lh_get_dictionary_size( header ); + if( !isvalid_ds( dictionary_size ) ) + { Pp_show_msg( pp, bad_dict_msg ); retval = 2; break; } + + if( verbosity >= 2 || ( verbosity == 1 && first_member ) ) + Pp_show_msg( pp, 0 ); + + struct LZ_decoder decoder; + if( !LZd_init( &decoder, &rdec, buffer_size, dictionary_size, outfd ) ) + { + Pp_show_msg( pp, "Not enough memory. Try a smaller output buffer size." ); + retval = 1; break; + } + show_dprogress( cfile_size, partial_file_pos, &rdec, pp ); /* init */ + const int result = LZd_decode_member( &decoder, cl_opts, pp ); + partial_file_pos += Rd_member_position( &rdec ); + LZd_free( &decoder ); + if( result != 0 ) + { + if( verbosity >= 0 && result <= 2 ) + { + Pp_show_msg( pp, 0 ); + fprintf( stderr, "%s at pos %llu\n", ( result == 2 ) ? + "File ends unexpectedly" : "Decoder error", + partial_file_pos ); + } + else if( result == 5 ) Pp_show_msg( pp, empty_msg ); + else if( result == 6 ) Pp_show_msg( pp, marking_msg ); + retval = 2; break; + } + if( verbosity >= 2 ) + { fputs( testing ? "ok\n" : "done\n", stderr ); Pp_reset( pp ); } + } + Rd_free( &rdec ); + if( verbosity == 1 && retval == 0 ) + fputs( testing ? "ok\n" : "done\n", stderr ); + return retval; + } + + +void show_error( const char * const msg, const int errcode, const bool help ) + { + if( verbosity < 0 ) return; + if( msg && msg[0] ) + fprintf( stderr, "%s: %s%s%s\n", program_name, msg, + ( errcode > 0 ) ? ": " : "", + ( errcode > 0 ) ? strerror( errcode ) : "" ); + if( help ) + fprintf( stderr, "Try '%s --help' for more information.\n", + invocation_name ); + } + + +void show_file_error( const char * const filename, const char * const msg, + const int errcode ) + { + if( verbosity >= 0 ) + fprintf( stderr, "%s: %s: %s%s%s\n", program_name, filename, msg, + ( errcode > 0 ) ? ": " : "", + ( errcode > 0 ) ? strerror( errcode ) : "" ); + } + + +static void internal_error( const char * const msg ) + { + if( verbosity >= 0 ) + fprintf( stderr, "%s: internal error: %s\n", program_name, msg ); + exit( 3 ); + } + + +void show_dprogress( const unsigned long long cfile_size, + const unsigned long long partial_size, + const struct Range_decoder * const d, + struct Pretty_print * const p ) + { + static unsigned long long csize = 0; /* file_size / 100 */ + static unsigned long long psize = 0; + static const struct Range_decoder * rdec = 0; + static struct Pretty_print * pp = 0; + static int counter = 0; + static bool enabled = true; + + if( !enabled ) return; + if( p ) /* initialize static vars */ + { + if( verbosity < 2 || !isatty( STDERR_FILENO ) ) { enabled = false; return; } + csize = cfile_size; psize = partial_size; rdec = d; pp = p; counter = 0; + } + if( rdec && pp && --counter <= 0 ) + { + const unsigned long long pos = psize + Rd_member_position( rdec ); + counter = 7; /* update display every 114688 bytes */ + if( csize > 0 ) + fprintf( stderr, "%4llu%% %.1f MB\r", pos / csize, pos / 1000000.0 ); + else + fprintf( stderr, " %.1f MB\r", pos / 1000000.0 ); + Pp_reset( pp ); Pp_show_msg( pp, 0 ); /* restore cursor position */ + } + } + + +int main( const int argc, const char * const argv[] ) + { + const char * default_output_filename = ""; + unsigned buffer_size = max_dictionary_size; + enum Mode program_mode = m_compress; + int i; + struct Cl_options cl_opts; /* command-line options */ + Cl_options_init( &cl_opts ); + bool force = false; + bool keep_input_files = false; + bool to_stdout = false; + if( argc > 0 ) invocation_name = argv[0]; + + enum { opt_eer = 256, opt_lt, opt_mer }; + const struct ap_Option options[] = + { + { 'a', "trailing-error", ap_no }, + { 'c', "stdout", ap_no }, + { 'd', "decompress", ap_no }, + { 'f', "force", ap_no }, + { 'h', "help", ap_no }, + { 'k', "keep", ap_no }, + { 'l', "list", ap_no }, + { 'n', "threads", ap_yes }, + { 'o', "output", ap_yes }, + { 'q', "quiet", ap_no }, + { 't', "test", ap_no }, + { 'u', "buffer-size", ap_yes }, + { 'v', "verbose", ap_no }, + { 'V', "version", ap_no }, + { opt_eer, "empty-error", ap_no }, + { opt_lt, "loose-trailing", ap_no }, + { opt_mer, "marking-error", ap_no }, + { 0, 0, ap_no } }; + + CRC32_init(); + + /* static because valgrind complains and memory management in C sucks */ + static struct Arg_parser parser; + if( !ap_init( &parser, argc, argv, options, 0 ) ) + { show_error( mem_msg, 0, false ); return 1; } + if( ap_error( &parser ) ) /* bad option */ + { show_error( ap_error( &parser ), 0, true ); return 1; } + + int argind = 0; + for( ; argind < ap_arguments( &parser ); ++argind ) + { + const int code = ap_code( &parser, argind ); + if( !code ) break; /* no more options */ + const char * const pn = ap_parsed_name( &parser, argind ); + const char * const arg = ap_argument( &parser, argind ); + switch( code ) + { + case 'a': cl_opts.ignore_trailing = false; break; + case 'c': to_stdout = true; break; + case 'd': set_mode( &program_mode, m_decompress ); break; + case 'f': force = true; break; + case 'h': show_help(); return 0; + case 'k': keep_input_files = true; break; + case 'l': set_mode( &program_mode, m_list ); break; + case 'n': break; + case 'o': if( strcmp( arg, "-" ) == 0 ) to_stdout = true; + else { default_output_filename = arg; } break; + case 'q': verbosity = -1; break; + case 't': set_mode( &program_mode, m_test ); break; + case 'u': buffer_size = get_dict_size( arg, pn ); break; + case 'v': if( verbosity < 4 ) ++verbosity; break; + case 'V': show_version(); return 0; + case opt_eer: cl_opts.ignore_empty = false; break; + case opt_lt: cl_opts.loose_trailing = true; break; + case opt_mer: cl_opts.ignore_marking = false; break; + default: internal_error( "uncaught option." ); + } + } /* end process options */ + +#if defined __MSVCRT__ || defined __OS2__ || defined __DJGPP__ + setmode( STDIN_FILENO, O_BINARY ); + setmode( STDOUT_FILENO, O_BINARY ); +#endif + + static const char ** filenames = 0; + int num_filenames = max( 1, ap_arguments( &parser ) - argind ); + filenames = resize_buffer( filenames, num_filenames * sizeof filenames[0] ); + filenames[0] = "-"; + + bool filenames_given = false; + for( i = 0; argind + i < ap_arguments( &parser ); ++i ) + { + filenames[i] = ap_argument( &parser, argind + i ); + if( strcmp( filenames[i], "-" ) != 0 ) filenames_given = true; + } + + if( program_mode == m_list ) + return list_files( filenames, num_filenames, &cl_opts ); + + if( program_mode == m_compress ) + program_mode = m_decompress; /* default mode */ + if( program_mode == m_test ) to_stdout = false; /* apply overrides */ + if( program_mode == m_test || to_stdout ) default_output_filename = ""; + + if( buffer_size < max_dictionary_size ) + { + bool from_stdin = false; + if( to_stdout || program_mode == m_test ) + { show_error( "'--buffer-size' is incompatible with '--stdout' and '--test'.", + 0, false ); return 1; } + for( i = 0; i < num_filenames; ++i ) + if( !filenames[i][0] || strcmp( filenames[i], "-" ) == 0 ) + { from_stdin = true; break; } + if( from_stdin && !default_output_filename[0] ) + { show_error( "Output file must be specified when decompressing from standard input\n" + " with a reduced buffer size.", 0, false ); return 1; } + } + + output_filename = resize_buffer( output_filename, 1 ); + output_filename[0] = 0; + if( to_stdout && program_mode != m_test ) outfd = STDOUT_FILENO; + else outfd = -1; + + const bool to_file = !to_stdout && program_mode != m_test && + default_output_filename[0]; + if( !to_stdout && program_mode != m_test && ( filenames_given || to_file ) ) + set_signals( signal_handler ); + + static struct Pretty_print pp; + Pp_init( &pp, filenames, num_filenames ); + + int failed_tests = 0; + int retval = 0; + const bool one_to_one = !to_stdout && program_mode != m_test && !to_file; + bool stdin_used = false; + struct stat in_stats; + for( i = 0; i < num_filenames; ++i ) + { + const char * input_filename = ""; + int infd; + + Pp_set_name( &pp, filenames[i] ); + if( strcmp( filenames[i], "-" ) == 0 ) + { + if( stdin_used ) continue; else stdin_used = true; + infd = STDIN_FILENO; + if( !check_tty_in( pp.name, infd, program_mode, &retval ) ) continue; + if( one_to_one ) { outfd = STDOUT_FILENO; output_filename[0] = 0; } + } + else + { + input_filename = filenames[i]; + infd = open_instream( input_filename, &in_stats, one_to_one, false ); + if( infd < 0 ) { set_retval( &retval, 1 ); continue; } + if( !check_tty_in( pp.name, infd, program_mode, &retval ) ) continue; + if( one_to_one ) /* open outfd after checking infd */ + { + set_d_outname( input_filename, extension_index( input_filename ) ); + if( !open_outstream( force, true ) ) + { close( infd ); set_retval( &retval, 1 ); continue; } + } + } + + if( to_file && outfd < 0 ) /* open outfd after checking infd */ + { + output_filename = resize_buffer( output_filename, + strlen( default_output_filename ) + 1 ); + strcpy( output_filename, default_output_filename ); + if( !open_outstream( force, false ) ) return 1; + } + + if( delete_output_on_interrupt && buffer_size < max_dictionary_size ) + { + struct stat st; + if( fstat( outfd, &st ) != 0 || !S_ISREG( st.st_mode ) ) + { + if( verbosity >= 0 ) + fprintf( stderr, "%s: %s: Output file is not a regular file,\n" + " and 'low memory' mode has been requested.\n", + program_name, output_filename ); + set_retval( &retval, 1 ); + return retval; /* don't try to delete a non-regular file */ + } + } + + const struct stat * const in_statsp = + ( input_filename[0] && one_to_one ) ? &in_stats : 0; + const unsigned long long cfile_size = + ( input_filename[0] && S_ISREG( in_stats.st_mode ) ) ? + ( in_stats.st_size + 99 ) / 100 : 0; + int tmp = decompress( cfile_size, infd, &cl_opts, &pp, buffer_size, + program_mode == m_test ); + if( close( infd ) != 0 ) + { show_file_error( pp.name, "Error closing input file", errno ); + set_retval( &tmp, 1 ); } + set_retval( &retval, tmp ); + if( tmp ) + { if( program_mode != m_test ) cleanup_and_fail( retval ); + else ++failed_tests; } + + if( delete_output_on_interrupt && one_to_one ) + close_and_set_permissions( in_statsp ); + if( input_filename[0] && !keep_input_files && one_to_one ) + remove( input_filename ); + } + if( delete_output_on_interrupt ) /* -o */ + close_and_set_permissions( ( retval == 0 && !stdin_used && + filenames_given && num_filenames == 1 ) ? &in_stats : 0 ); + else if( outfd >= 0 && close( outfd ) != 0 ) /* -c */ + { + show_error( "Error closing stdout", errno, false ); + set_retval( &retval, 1 ); + } + if( failed_tests > 0 && verbosity >= 1 && num_filenames > 1 ) + fprintf( stderr, "%s: warning: %d %s failed the test.\n", + program_name, failed_tests, + ( failed_tests == 1 ) ? "file" : "files" ); + free( output_filename ); + free( filenames ); + ap_free( &parser ); + return retval; + } diff --git a/testsuite/check.sh b/testsuite/check.sh new file mode 100755 index 0000000..1d36069 --- /dev/null +++ b/testsuite/check.sh @@ -0,0 +1,377 @@ +#! /bin/sh +# check script for Lunzip - Decompressor for the lzip format +# Copyright (C) 2010-2024 Antonio Diaz Diaz. +# +# This script is free software: you have unlimited permission +# to copy, distribute, and modify it. + +LC_ALL=C +export LC_ALL +objdir=`pwd` +testdir=`cd "$1" ; pwd` +LZIP="${objdir}"/lunzip +framework_failure() { echo "failure in testing framework" ; exit 1 ; } + +if [ ! -f "${LZIP}" ] || [ ! -x "${LZIP}" ] ; then + echo "${LZIP}: cannot execute" + exit 1 +fi + +[ -e "${LZIP}" ] 2> /dev/null || + { + echo "$0: a POSIX shell is required to run the tests" + echo "Try bash -c \"$0 $1 $2\"" + exit 1 + } + +if [ -d tmp ] ; then rm -rf tmp ; fi +mkdir tmp +cd "${objdir}"/tmp || framework_failure + +cat "${testdir}"/test.txt > in || framework_failure +in_lz="${testdir}"/test.txt.lz +in_em="${testdir}"/test_em.txt.lz +fox_lz="${testdir}"/fox.lz +fox6_lz="${testdir}"/fox6.lz +f6mk_lz="${testdir}"/fox6_mark.lz +fail=0 +test_failed() { fail=1 ; printf " $1" ; [ -z "$2" ] || printf "($2)" ; } + +printf "testing lunzip-%s..." "$2" + +cat "${in_lz}" > uin.lz || framework_failure +for i in bad_size -1 0 4095 513MiB 1G 1T 1P 1E 1Z 1Y 10KB ; do + "${LZIP}" -dfkq -u $i uin.lz + [ $? = 1 ] || test_failed $LINENO $i + [ ! -e uin ] || test_failed $LINENO $i +done +rm -f uin.lz || framework_failure +"${LZIP}" -lq in +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -tq in +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -tq < in +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -cdq in +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -cdq < in +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -dq -o in < "${in_lz}" +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" -dq -o in "${in_lz}" +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" -dq -o out nx_file.lz +[ $? = 1 ] || test_failed $LINENO +[ ! -e out ] || test_failed $LINENO +# these are for code coverage +"${LZIP}" -lt "${in_lz}" 2> /dev/null +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" -cdl "${in_lz}" 2> /dev/null +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" -cdt "${in_lz}" 2> /dev/null +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" -t -- nx_file.lz 2> /dev/null +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" -t "" < /dev/null 2> /dev/null +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" --help > /dev/null || test_failed $LINENO +"${LZIP}" -n1 -V > /dev/null || test_failed $LINENO +"${LZIP}" -m 2> /dev/null +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" -z 2> /dev/null +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" --bad_option 2> /dev/null +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" --t 2> /dev/null +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" --test=2 2> /dev/null +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" --output= 2> /dev/null +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" --output 2> /dev/null +[ $? = 1 ] || test_failed $LINENO +printf "LZIP\001-.............................." | "${LZIP}" -t 2> /dev/null +printf "LZIP\002-.............................." | "${LZIP}" -t 2> /dev/null +printf "LZIP\001+.............................." | "${LZIP}" -t 2> /dev/null + +printf "\ntesting decompression..." + +for i in "${in_lz}" "${in_em}" ; do + "${LZIP}" -lq "$i" || test_failed $LINENO "$i" + "${LZIP}" -t "$i" || test_failed $LINENO "$i" + "${LZIP}" -d "$i" -o out || test_failed $LINENO "$i" + cmp in out || test_failed $LINENO "$i" + "${LZIP}" -cd "$i" > out || test_failed $LINENO "$i" + cmp in out || test_failed $LINENO "$i" + "${LZIP}" -d "$i" -o - > out || test_failed $LINENO "$i" + cmp in out || test_failed $LINENO "$i" + "${LZIP}" -d < "$i" > out || test_failed $LINENO "$i" + cmp in out || test_failed $LINENO "$i" + rm -f out || framework_failure +done + +lines=`"${LZIP}" -tvv "${in_em}" 2>&1 | wc -l` || test_failed $LINENO +[ "${lines}" -eq 8 ] || test_failed $LINENO "${lines}" +"${LZIP}" -tq "${in_em}" --empty-error +[ $? = 2 ] || test_failed $LINENO + +lines=`"${LZIP}" -lvv "${in_em}" | wc -l` || test_failed $LINENO +[ "${lines}" -eq 11 ] || test_failed $LINENO "${lines}" +"${LZIP}" -lq "${in_em}" --empty-error +[ $? = 2 ] || test_failed $LINENO + +cat "${in_lz}" > out.lz || framework_failure +"${LZIP}" -dk out.lz || test_failed $LINENO +cmp in out || test_failed $LINENO +rm -f out || framework_failure +"${LZIP}" -cd "${fox_lz}" > fox || test_failed $LINENO +cat fox > copy || framework_failure +cat "${in_lz}" > copy.lz || framework_failure +"${LZIP}" -d copy.lz out.lz 2> /dev/null # skip copy, decompress out +[ $? = 1 ] || test_failed $LINENO +[ ! -e out.lz ] || test_failed $LINENO +cmp fox copy || test_failed $LINENO +cmp in out || test_failed $LINENO +"${LZIP}" -df copy.lz || test_failed $LINENO +[ ! -e copy.lz ] || test_failed $LINENO +cmp in copy || test_failed $LINENO +rm -f copy out || framework_failure + +printf "to be overwritten" > out || framework_failure +"${LZIP}" -df -o out < "${in_lz}" || test_failed $LINENO +cmp in out || test_failed $LINENO +rm -f out || framework_failure +"${LZIP}" -d -o ./- "${in_lz}" || test_failed $LINENO +cmp in ./- || test_failed $LINENO +rm -f ./- || framework_failure +"${LZIP}" -d -o ./- < "${in_lz}" || test_failed $LINENO +cmp in ./- || test_failed $LINENO +rm -f ./- || framework_failure + +cat "${in_lz}" > anyothername || framework_failure +"${LZIP}" -dv - anyothername - < "${in_lz}" > out 2> /dev/null || + test_failed $LINENO +cmp in out || test_failed $LINENO +cmp in anyothername.out || test_failed $LINENO +rm -f out anyothername.out || framework_failure + +"${LZIP}" -lq in "${in_lz}" +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -lq nx_file.lz "${in_lz}" +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" -tq in "${in_lz}" +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -tq nx_file.lz "${in_lz}" +[ $? = 1 ] || test_failed $LINENO +"${LZIP}" -cdq in "${in_lz}" > out +[ $? = 2 ] || test_failed $LINENO +cat out in | cmp in - || test_failed $LINENO # out must be empty +"${LZIP}" -cdq nx_file.lz "${in_lz}" > out # skip nx_file, decompress in +[ $? = 1 ] || test_failed $LINENO +cmp in out || test_failed $LINENO +rm -f out || framework_failure +cat "${in_lz}" > out.lz || framework_failure +for i in 1 2 3 4 5 6 7 ; do + printf "g" >> out.lz || framework_failure + "${LZIP}" -alvv out.lz "${in_lz}" > /dev/null 2>&1 + [ $? = 2 ] || test_failed $LINENO $i + "${LZIP}" -atvvvv out.lz "${in_lz}" 2> /dev/null + [ $? = 2 ] || test_failed $LINENO $i +done +"${LZIP}" -dq in out.lz +[ $? = 2 ] || test_failed $LINENO +[ -e out.lz ] || test_failed $LINENO +[ ! -e out ] || test_failed $LINENO +[ ! -e in.out ] || test_failed $LINENO +"${LZIP}" -dq nx_file.lz out.lz +[ $? = 1 ] || test_failed $LINENO +[ ! -e out.lz ] || test_failed $LINENO +[ ! -e nx_file ] || test_failed $LINENO +cmp in out || test_failed $LINENO +rm -f out || framework_failure + +cat in in > in2 || framework_failure +"${LZIP}" -lq "${in_lz}" "${in_lz}" || test_failed $LINENO +"${LZIP}" -t "${in_lz}" "${in_lz}" || test_failed $LINENO +"${LZIP}" -cd "${in_lz}" "${in_lz}" -o out > out2 || test_failed $LINENO +[ ! -e out ] || test_failed $LINENO # override -o +cmp in2 out2 || test_failed $LINENO +rm -f out2 || framework_failure +"${LZIP}" -d "${in_lz}" "${in_lz}" -o out2 || test_failed $LINENO +cmp in2 out2 || test_failed $LINENO +rm -f out2 || framework_failure + +cat "${in_lz}" "${in_lz}" > out2.lz || framework_failure +printf "\ngarbage" >> out2.lz || framework_failure +"${LZIP}" -tvvvv out2.lz 2> /dev/null || test_failed $LINENO +"${LZIP}" -alq out2.lz +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -atq out2.lz +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -atq < out2.lz +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -adkq out2.lz +[ $? = 2 ] || test_failed $LINENO +[ ! -e out2 ] || test_failed $LINENO +"${LZIP}" -adkq -o out2 < out2.lz +[ $? = 2 ] || test_failed $LINENO +[ ! -e out2 ] || test_failed $LINENO +printf "to be overwritten" > out2 || framework_failure +"${LZIP}" -df out2.lz || test_failed $LINENO +cmp in2 out2 || test_failed $LINENO +rm -f out2 || framework_failure + +for i in 12 5120 6Ki 29 512KiB ; do + printf "to be overwritten" > out || framework_failure + "${LZIP}" -df -u$i -o out < "${in_lz}" || test_failed $LINENO $i + cmp in out || test_failed $LINENO $i + rm -f out || framework_failure + "${LZIP}" -d -u$i -o out "${in_lz}" || test_failed $LINENO $i + cmp in out || test_failed $LINENO $i + "${LZIP}" -d -u$i -o out2 "${in_lz}" "${in_lz}" || + test_failed $LINENO $i + cmp in2 out2 || test_failed $LINENO $i + rm -f out2 || framework_failure +done +rm -f in2 out || framework_failure + +"${LZIP}" -cd "${fox6_lz}" > out || test_failed $LINENO +"${LZIP}" -cd "${f6mk_lz}" > copy || test_failed $LINENO +cmp copy out || test_failed $LINENO +rm -f copy out || framework_failure +"${LZIP}" -lq "${f6mk_lz}" --marking-error +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -tq "${f6mk_lz}" --marking-error +[ $? = 2 ] || test_failed $LINENO + +"${LZIP}" -d "${fox_lz}" -o a/b/c/fox || test_failed $LINENO +cmp fox a/b/c/fox || test_failed $LINENO +rm -rf a || framework_failure +"${LZIP}" -d -o a/b/c/fox < "${fox_lz}" || test_failed $LINENO +cmp fox a/b/c/fox || test_failed $LINENO +rm -rf a || framework_failure +"${LZIP}" -dq "${fox_lz}" -o a/b/c/ +[ $? = 1 ] || test_failed $LINENO +[ ! -e a ] || test_failed $LINENO + +printf "\ntesting bad input..." + +headers='LZIp LZiP LZip LzIP LzIp LziP lZIP lZIp lZiP lzIP' +body='\001\014\000\203\377\373\377\377\300\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000$\000\000\000\000\000\000\000' +cat "${in_lz}" > int.lz || framework_failure +printf "LZIP${body}" >> int.lz || framework_failure +if "${LZIP}" -tq int.lz ; then + for header in ${headers} ; do + printf "${header}${body}" > int.lz || framework_failure + "${LZIP}" -lq int.lz # first member + [ $? = 2 ] || test_failed $LINENO ${header} + "${LZIP}" -tq int.lz + [ $? = 2 ] || test_failed $LINENO ${header} + "${LZIP}" -tq < int.lz + [ $? = 2 ] || test_failed $LINENO ${header} + "${LZIP}" -cdq int.lz > /dev/null + [ $? = 2 ] || test_failed $LINENO ${header} + "${LZIP}" -lq --loose-trailing int.lz + [ $? = 2 ] || test_failed $LINENO ${header} + "${LZIP}" -tq --loose-trailing int.lz + [ $? = 2 ] || test_failed $LINENO ${header} + "${LZIP}" -tq --loose-trailing < int.lz + [ $? = 2 ] || test_failed $LINENO ${header} + "${LZIP}" -cdq --loose-trailing int.lz > /dev/null + [ $? = 2 ] || test_failed $LINENO ${header} + cat "${in_lz}" > int.lz || framework_failure + printf "${header}${body}" >> int.lz || framework_failure + "${LZIP}" -lq int.lz # trailing data + [ $? = 2 ] || test_failed $LINENO ${header} + "${LZIP}" -tq int.lz + [ $? = 2 ] || test_failed $LINENO ${header} + "${LZIP}" -tq < int.lz + [ $? = 2 ] || test_failed $LINENO ${header} + "${LZIP}" -cdq int.lz > /dev/null + [ $? = 2 ] || test_failed $LINENO ${header} + "${LZIP}" -lq --loose-trailing int.lz || + test_failed $LINENO ${header} + "${LZIP}" -t --loose-trailing int.lz || + test_failed $LINENO ${header} + "${LZIP}" -t --loose-trailing < int.lz || + test_failed $LINENO ${header} + "${LZIP}" -cd --loose-trailing int.lz > /dev/null || + test_failed $LINENO ${header} + "${LZIP}" -lq --loose-trailing --trailing-error int.lz + [ $? = 2 ] || test_failed $LINENO ${header} + "${LZIP}" -tq --loose-trailing --trailing-error int.lz + [ $? = 2 ] || test_failed $LINENO ${header} + "${LZIP}" -tq --loose-trailing --trailing-error < int.lz + [ $? = 2 ] || test_failed $LINENO ${header} + "${LZIP}" -cdq --loose-trailing --trailing-error int.lz > /dev/null + [ $? = 2 ] || test_failed $LINENO ${header} + done +else + printf "\nwarning: skipping header test: 'printf' does not work on your system." +fi +rm -f int.lz || framework_failure + +for i in fox_v2.lz fox_s11.lz fox_de20.lz \ + fox_bcrc.lz fox_crc0.lz fox_das46.lz fox_mes81.lz ; do + "${LZIP}" -tq "${testdir}"/$i + [ $? = 2 ] || test_failed $LINENO $i +done + +for i in fox_bcrc.lz fox_crc0.lz fox_das46.lz fox_mes81.lz ; do + "${LZIP}" -cdq "${testdir}"/$i > out + [ $? = 2 ] || test_failed $LINENO $i + cmp fox out || test_failed $LINENO $i +done +rm -f fox out || framework_failure + +cat "${in_lz}" "${in_lz}" > in2.lz || framework_failure +cat "${in_lz}" "${in_lz}" "${in_lz}" > in3.lz || framework_failure +if dd if=in3.lz of=trunc.lz bs=14752 count=1 2> /dev/null && + [ -e trunc.lz ] && cmp in2.lz trunc.lz > /dev/null 2>&1 ; then + for i in 6 20 14734 14753 14754 14755 14756 14757 14758 ; do + dd if=in3.lz of=trunc.lz bs=$i count=1 2> /dev/null + "${LZIP}" -lq trunc.lz + [ $? = 2 ] || test_failed $LINENO $i + "${LZIP}" -tq trunc.lz + [ $? = 2 ] || test_failed $LINENO $i + "${LZIP}" -tq < trunc.lz + [ $? = 2 ] || test_failed $LINENO $i + "${LZIP}" -cdq trunc.lz > /dev/null + [ $? = 2 ] || test_failed $LINENO $i + "${LZIP}" -dq < trunc.lz > /dev/null + [ $? = 2 ] || test_failed $LINENO $i + done +else + printf "\nwarning: skipping truncation test: 'dd' does not work on your system." +fi +rm -f in2.lz in3.lz trunc.lz || framework_failure + +cat "${in_lz}" > ingin.lz || framework_failure +printf "g" >> ingin.lz || framework_failure +cat "${in_lz}" >> ingin.lz || framework_failure +"${LZIP}" -lq ingin.lz +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -atq ingin.lz +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -atq < ingin.lz +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -acdq ingin.lz > /dev/null +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -adq < ingin.lz > /dev/null +[ $? = 2 ] || test_failed $LINENO +"${LZIP}" -t ingin.lz || test_failed $LINENO +"${LZIP}" -t < ingin.lz || test_failed $LINENO +"${LZIP}" -cd ingin.lz > out || test_failed $LINENO +cmp in out || test_failed $LINENO +"${LZIP}" -d < ingin.lz > out || test_failed $LINENO +cmp in out || test_failed $LINENO +rm -f out ingin.lz || framework_failure + +echo +if [ ${fail} = 0 ] ; then + echo "tests completed successfully." + cd "${objdir}" && rm -r tmp +else + echo "tests failed." +fi +exit ${fail} diff --git a/testsuite/fox.lz b/testsuite/fox.lz Binary files differnew file mode 100644 index 0000000..509da82 --- /dev/null +++ b/testsuite/fox.lz diff --git a/testsuite/fox6.lz b/testsuite/fox6.lz Binary files differnew file mode 100644 index 0000000..8401b99 --- /dev/null +++ b/testsuite/fox6.lz diff --git a/testsuite/fox6_mark.lz b/testsuite/fox6_mark.lz Binary files differnew file mode 100644 index 0000000..32b2ac0 --- /dev/null +++ b/testsuite/fox6_mark.lz diff --git a/testsuite/fox_bcrc.lz b/testsuite/fox_bcrc.lz Binary files differnew file mode 100644 index 0000000..8f6a7c4 --- /dev/null +++ b/testsuite/fox_bcrc.lz diff --git a/testsuite/fox_crc0.lz b/testsuite/fox_crc0.lz Binary files differnew file mode 100644 index 0000000..1abe926 --- /dev/null +++ b/testsuite/fox_crc0.lz diff --git a/testsuite/fox_das46.lz b/testsuite/fox_das46.lz Binary files differnew file mode 100644 index 0000000..43ed9f9 --- /dev/null +++ b/testsuite/fox_das46.lz diff --git a/testsuite/fox_de20.lz b/testsuite/fox_de20.lz Binary files differnew file mode 100644 index 0000000..10949d8 --- /dev/null +++ b/testsuite/fox_de20.lz diff --git a/testsuite/fox_mes81.lz b/testsuite/fox_mes81.lz Binary files differnew file mode 100644 index 0000000..d50ef2e --- /dev/null +++ b/testsuite/fox_mes81.lz diff --git a/testsuite/fox_s11.lz b/testsuite/fox_s11.lz Binary files differnew file mode 100644 index 0000000..dca909c --- /dev/null +++ b/testsuite/fox_s11.lz diff --git a/testsuite/fox_v2.lz b/testsuite/fox_v2.lz Binary files differnew file mode 100644 index 0000000..8620981 --- /dev/null +++ b/testsuite/fox_v2.lz diff --git a/testsuite/test.txt b/testsuite/test.txt new file mode 100644 index 0000000..9196a3a --- /dev/null +++ b/testsuite/test.txt @@ -0,0 +1,676 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Lesser General Public License instead.) You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +this service if you wish), that you receive source code or can get it +if you want it, that you can change the software or use pieces of it +in new free programs; and that you know you can do these things. + + To protect your rights, we need to make restrictions that forbid +anyone to deny you these rights or to ask you to surrender the rights. +These restrictions translate to certain responsibilities for you if you +distribute copies of the software, or if you modify it. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must give the recipients all the rights that +you have. You must make sure that they, too, receive or can get the +source code. And you must show them these terms so they know their +rights. + + We protect your rights with two steps: (1) copyright the software, and +(2) offer you this license which gives you legal permission to copy, +distribute and/or modify the software. + + Also, for each author's protection and ours, we want to make certain +that everyone understands that there is no warranty for this free +software. If the software is modified by someone else and passed on, we +want its recipients to know that what they have is not the original, so +that any problems introduced by others will not reflect on the original +authors' reputations. + + Finally, any free program is threatened constantly by software +patents. We wish to avoid the danger that redistributors of a free +program will individually obtain patent licenses, in effect making the +program proprietary. To prevent this, we have made it clear that any +patent must be licensed for everyone's free use or not licensed at all. + + The precise terms and conditions for copying, distribution and +modification follow. + + GNU GENERAL PUBLIC LICENSE + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION + + 0. This License applies to any program or other work which contains +a notice placed by the copyright holder saying it may be distributed +under the terms of this General Public License. The "Program", below, +refers to any such program or work, and a "work based on the Program" +means either the Program or any derivative work under copyright law: +that is to say, a work containing the Program or a portion of it, +either verbatim or with modifications and/or translated into another +language. (Hereinafter, translation is included without limitation in +the term "modification".) Each licensee is addressed as "you". + +Activities other than copying, distribution and modification are not +covered by this License; they are outside its scope. The act of +running the Program is not restricted, and the output from the Program +is covered only if its contents constitute a work based on the +Program (independent of having been made by running the Program). +Whether that is true depends on what the Program does. + + 1. You may copy and distribute verbatim copies of the Program's +source code as you receive it, in any medium, provided that you +conspicuously and appropriately publish on each copy an appropriate +copyright notice and disclaimer of warranty; keep intact all the +notices that refer to this License and to the absence of any warranty; +and give any other recipients of the Program a copy of this License +along with the Program. + +You may charge a fee for the physical act of transferring a copy, and +you may at your option offer warranty protection in exchange for a fee. + + 2. You may modify your copy or copies of the Program or any portion +of it, thus forming a work based on the Program, and copy and +distribute such modifications or work under the terms of Section 1 +above, provided that you also meet all of these conditions: + + a) You must cause the modified files to carry prominent notices + stating that you changed the files and the date of any change. + + b) You must cause any work that you distribute or publish, that in + whole or in part contains or is derived from the Program or any + part thereof, to be licensed as a whole at no charge to all third + parties under the terms of this License. + + c) If the modified program normally reads commands interactively + when run, you must cause it, when started running for such + interactive use in the most ordinary way, to print or display an + announcement including an appropriate copyright notice and a + notice that there is no warranty (or else, saying that you provide + a warranty) and that users may redistribute the program under + these conditions, and telling the user how to view a copy of this + License. (Exception: if the Program itself is interactive but + does not normally print such an announcement, your work based on + the Program is not required to print an announcement.) + +These requirements apply to the modified work as a whole. If +identifiable sections of that work are not derived from the Program, +and can be reasonably considered independent and separate works in +themselves, then this License, and its terms, do not apply to those +sections when you distribute them as separate works. But when you +distribute the same sections as part of a whole which is a work based +on the Program, the distribution of the whole must be on the terms of +this License, whose permissions for other licensees extend to the +entire whole, and thus to each and every part regardless of who wrote it. + +Thus, it is not the intent of this section to claim rights or contest +your rights to work written entirely by you; rather, the intent is to +exercise the right to control the distribution of derivative or +collective works based on the Program. + +In addition, mere aggregation of another work not based on the Program +with the Program (or with a work based on the Program) on a volume of +a storage or distribution medium does not bring the other work under +the scope of this License. + + 3. You may copy and distribute the Program (or a work based on it, +under Section 2) in object code or executable form under the terms of +Sections 1 and 2 above provided that you also do one of the following: + + a) Accompany it with the complete corresponding machine-readable + source code, which must be distributed under the terms of Sections + 1 and 2 above on a medium customarily used for software interchange; or, + + b) Accompany it with a written offer, valid for at least three + years, to give any third party, for a charge no more than your + cost of physically performing source distribution, a complete + machine-readable copy of the corresponding source code, to be + distributed under the terms of Sections 1 and 2 above on a medium + customarily used for software interchange; or, + + c) Accompany it with the information you received as to the offer + to distribute corresponding source code. (This alternative is + allowed only for noncommercial distribution and only if you + received the program in object code or executable form with such + an offer, in accord with Subsection b above.) + +The source code for a work means the preferred form of the work for +making modifications to it. For an executable work, complete source +code means all the source code for all modules it contains, plus any +associated interface definition files, plus the scripts used to +control compilation and installation of the executable. However, as a +special exception, the source code distributed need not include +anything that is normally distributed (in either source or binary +form) with the major components (compiler, kernel, and so on) of the +operating system on which the executable runs, unless that component +itself accompanies the executable. + +If distribution of executable or object code is made by offering +access to copy from a designated place, then offering equivalent +access to copy the source code from the same place counts as +distribution of the source code, even though third parties are not +compelled to copy the source along with the object code. + + 4. You may not copy, modify, sublicense, or distribute the Program +except as expressly provided under this License. Any attempt +otherwise to copy, modify, sublicense or distribute the Program is +void, and will automatically terminate your rights under this License. +However, parties who have received copies, or rights, from you under +this License will not have their licenses terminated so long as such +parties remain in full compliance. + + 5. You are not required to accept this License, since you have not +signed it. However, nothing else grants you permission to modify or +distribute the Program or its derivative works. These actions are +prohibited by law if you do not accept this License. Therefore, by +modifying or distributing the Program (or any work based on the +Program), you indicate your acceptance of this License to do so, and +all its terms and conditions for copying, distributing or modifying +the Program or works based on it. + + 6. Each time you redistribute the Program (or any work based on the +Program), the recipient automatically receives a license from the +original licensor to copy, distribute or modify the Program subject to +these terms and conditions. You may not impose any further +restrictions on the recipients' exercise of the rights granted herein. +You are not responsible for enforcing compliance by third parties to +this License. + + 7. If, as a consequence of a court judgment or allegation of patent +infringement or for any other reason (not limited to patent issues), +conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot +distribute so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you +may not distribute the Program at all. For example, if a patent +license would not permit royalty-free redistribution of the Program by +all those who receive copies directly or indirectly through you, then +the only way you could satisfy both it and this License would be to +refrain entirely from distribution of the Program. + +If any portion of this section is held invalid or unenforceable under +any particular circumstance, the balance of the section is intended to +apply and the section as a whole is intended to apply in other +circumstances. + +It is not the purpose of this section to induce you to infringe any +patents or other property right claims or to contest validity of any +such claims; this section has the sole purpose of protecting the +integrity of the free software distribution system, which is +implemented by public license practices. Many people have made +generous contributions to the wide range of software distributed +through that system in reliance on consistent application of that +system; it is up to the author/donor to decide if he or she is willing +to distribute software through any other system and a licensee cannot +impose that choice. + +This section is intended to make thoroughly clear what is believed to +be a consequence of the rest of this License. + + 8. If the distribution and/or use of the Program is restricted in +certain countries either by patents or by copyrighted interfaces, the +original copyright holder who places the Program under this License +may add an explicit geographical distribution limitation excluding +those countries, so that distribution is permitted only in or among +countries not thus excluded. In such case, this License incorporates +the limitation as if written in the body of this License. + + 9. The Free Software Foundation may publish revised and/or new versions +of the General Public License from time to time. Such new versions will +be similar in spirit to the present version, but may differ in detail to +address new problems or concerns. + +Each version is given a distinguishing version number. If the Program +specifies a version number of this License which applies to it and "any +later version", you have the option of following the terms and conditions +either of that version or of any later version published by the Free +Software Foundation. If the Program does not specify a version number of +this License, you may choose any version ever published by the Free Software +Foundation. + + 10. If you wish to incorporate parts of the Program into other free +programs whose distribution conditions are different, write to the author +to ask for permission. For software which is copyrighted by the Free +Software Foundation, write to the Free Software Foundation; we sometimes +make exceptions for this. Our decision will be guided by the two goals +of preserving the free status of all derivatives of our free software and +of promoting the sharing and reuse of software generally. + + NO WARRANTY + + 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY +FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN +OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES +PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED +OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS +TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE +PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, +REPAIR OR CORRECTION. + + 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR +REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, +INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING +OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED +TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY +YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER +PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE +POSSIBILITY OF SUCH DAMAGES. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) <year> <name of author> + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + <signature of Ty Coon>, 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. + GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it. (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.) You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+ To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+ For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have. You must make sure that they, too, receive or can get the
+source code. And you must show them these terms so they know their
+rights.
+
+ We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+ Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software. If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+ Finally, any free program is threatened constantly by software
+patents. We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary. To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+ The precise terms and conditions for copying, distribution and
+modification follow.
+
+ GNU GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License. The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language. (Hereinafter, translation is included without limitation in
+the term "modification".) Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope. The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+ 1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+ 2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+ a) You must cause the modified files to carry prominent notices
+ stating that you changed the files and the date of any change.
+
+ b) You must cause any work that you distribute or publish, that in
+ whole or in part contains or is derived from the Program or any
+ part thereof, to be licensed as a whole at no charge to all third
+ parties under the terms of this License.
+
+ c) If the modified program normally reads commands interactively
+ when run, you must cause it, when started running for such
+ interactive use in the most ordinary way, to print or display an
+ announcement including an appropriate copyright notice and a
+ notice that there is no warranty (or else, saying that you provide
+ a warranty) and that users may redistribute the program under
+ these conditions, and telling the user how to view a copy of this
+ License. (Exception: if the Program itself is interactive but
+ does not normally print such an announcement, your work based on
+ the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole. If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works. But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+ 3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+ a) Accompany it with the complete corresponding machine-readable
+ source code, which must be distributed under the terms of Sections
+ 1 and 2 above on a medium customarily used for software interchange; or,
+
+ b) Accompany it with a written offer, valid for at least three
+ years, to give any third party, for a charge no more than your
+ cost of physically performing source distribution, a complete
+ machine-readable copy of the corresponding source code, to be
+ distributed under the terms of Sections 1 and 2 above on a medium
+ customarily used for software interchange; or,
+
+ c) Accompany it with the information you received as to the offer
+ to distribute corresponding source code. (This alternative is
+ allowed only for noncommercial distribution and only if you
+ received the program in object code or executable form with such
+ an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it. For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable. However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+ 4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License. Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+ 5. You are not required to accept this License, since you have not
+signed it. However, nothing else grants you permission to modify or
+distribute the Program or its derivative works. These actions are
+prohibited by law if you do not accept this License. Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+ 6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions. You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+ 7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all. For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices. Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+ 8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded. In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+ 9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation. If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+ 10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission. For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this. Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+ NO WARRANTY
+
+ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+ 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+ Gnomovision version 69, Copyright (C) <year> <name of author>
+ Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+ `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+ <signature of Ty Coon>, 1 April 1989
+ Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
diff --git a/testsuite/test.txt.lz b/testsuite/test.txt.lz Binary files differnew file mode 100644 index 0000000..22cea6e --- /dev/null +++ b/testsuite/test.txt.lz diff --git a/testsuite/test_em.txt.lz b/testsuite/test_em.txt.lz Binary files differnew file mode 100644 index 0000000..7e96250 --- /dev/null +++ b/testsuite/test_em.txt.lz |