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-rw-r--r--AUTHORS6
-rw-r--r--ChangeLog6
-rw-r--r--Makefile.in4
-rw-r--r--NEWS7
-rw-r--r--README26
-rwxr-xr-xconfigure2
-rw-r--r--decoder.c17
-rw-r--r--decoder.h41
-rw-r--r--doc/lunzip.119
-rw-r--r--main.c140
-rwxr-xr-xtestsuite/check.sh20
11 files changed, 245 insertions, 43 deletions
diff --git a/AUTHORS b/AUTHORS
index fe4a97f..d3cc828 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -1 +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), Andrey 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).
diff --git a/ChangeLog b/ChangeLog
index eac5edd..df75519 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2013-10-30 Antonio Diaz Diaz <antonio@gnu.org>
+
+ * Version 1.5-rc1 released.
+ * main.c: Added 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.
diff --git a/Makefile.in b/Makefile.in
index 307943b..e04819f 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -1,8 +1,8 @@
DISTNAME = $(pkgname)-$(pkgversion)
INSTALL = install
-INSTALL_PROGRAM = $(INSTALL) -p -m 755
-INSTALL_DATA = $(INSTALL) -p -m 644
+INSTALL_PROGRAM = $(INSTALL) -m 755
+INSTALL_DATA = $(INSTALL) -m 644
INSTALL_DIR = $(INSTALL) -d -m 755
SHELL = /bin/sh
diff --git a/NEWS b/NEWS
index 9ec7370..cefaf2d 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,6 @@
-Changes in version 1.4:
+Changes in version 1.5:
-File version is no more shown in status messages.
+The new option "-u, --buffer-size", which activates a "low memory"
+decompression mode, has been added.
-Minor fixes.
+File date, permissions, and ownership are now copied like "cp -p" does.
diff --git a/README b/README
index 182d0c9..a64ac21 100644
--- a/README
+++ b/README
@@ -5,13 +5,23 @@ small size makes it well suited for embedded devices or software
installers that need to decompress files but do not need compression
capabilities. Lunzip is fully compatible with lzip-1.4 or newer.
+If the size of the output buffer is specified with the "--buffer-size"
+option, lunzip uses the decompressed file as dictionary for distances
+beyond the buffer size and is able to decompress any file using as
+little memory as 50 kB, irrespective of the dictionary size used to
+compress the file. Of course, the smaller the output buffer size used in
+relation to 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.
+
The lzip file format is designed for long-term data archiving. It is
clean, provides very safe 4 factor integrity checking, and is backed by
the recovery capabilities of lziprecover.
Lunzip uses the same well-defined exit status values used by lzip and
-bzip2, which makes it safer when used in pipes or scripts than
-decompressors returning ambiguous warning values, like gunzip.
+bzip2, which makes it safer than decompressors returning ambiguous
+warning values (like gunzip) when it is used as a back end for tar or
+zutils.
Lunzip replaces every file given in the command line with a decompressed
version of itself. Each decompressed file has the same modification
@@ -35,9 +45,15 @@ two or more compressed files. The result is the concatenation of the
corresponding uncompressed files. Integrity testing of concatenated
compressed files is also supported.
-The amount of memory required by lunzip to decompress a file is only a
-few tens of KiB larger than the dictionary size used to compress that
-file.
+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
+the "--buffer-size" option is specified.
+
+The ideas embodied in lunzip are due to (at least) the following people:
+Abraham Lempel and Jacob Ziv (for the LZ algorithm), Andrey 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).
Copyright (C) 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
diff --git a/configure b/configure
index 2ad9981..e23fea5 100755
--- a/configure
+++ b/configure
@@ -6,7 +6,7 @@
# to copy, distribute and modify it.
pkgname=lunzip
-pkgversion=1.4
+pkgversion=1.5-rc1
progname=lunzip
srctrigger=doc/${progname}.1
diff --git a/decoder.c b/decoder.c
index c079504..369dc86 100644
--- a/decoder.c
+++ b/decoder.c
@@ -87,6 +87,15 @@ static int writeblock( const int fd, const uint8_t * const buf, const int size )
}
+int seek_read( 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 )
@@ -193,6 +202,10 @@ int LZd_decode_member( struct LZ_decoder * const decoder,
struct Pretty_print * const pp )
{
struct Range_decoder * const rdec = decoder->rdec;
+ void (* const copy_block)
+ ( struct LZ_decoder * const decoder, const int distance, int len ) =
+ ( decoder->buffer_size >= decoder->dictionary_size ) ?
+ &LZd_copy_block : &LZd_copy_block2;
unsigned rep0 = 0; /* rep[0-3] latest four distances */
unsigned rep1 = 0; /* used for efficient coding of */
unsigned rep2 = 0; /* repeated distances */
@@ -293,10 +306,10 @@ int LZd_decode_member( struct LZ_decoder * const decoder,
rep3 = rep2; rep2 = rep1; rep1 = rep0_saved;
state = St_set_match( state );
if( rep0 >= (unsigned)decoder->dictionary_size ||
- ( rep0 >= (unsigned)decoder->pos && !decoder->partial_data_pos ) )
+ rep0 >= LZd_data_position( decoder ) )
{ LZd_flush_data( decoder ); return 1; }
}
- LZd_copy_block( decoder, rep0, len );
+ copy_block( decoder, rep0, len );
}
}
LZd_flush_data( decoder );
diff --git a/decoder.h b/decoder.h
index 063511b..118fe23 100644
--- a/decoder.h
+++ b/decoder.h
@@ -85,6 +85,7 @@ static inline void Rd_load( struct Range_decoder * const rdec )
for( i = 0; i < 5; ++i )
rdec->code = (rdec->code << 8) | Rd_get_byte( rdec );
rdec->range = 0xFFFFFFFFU;
+ rdec->code &= rdec->range; /* make sure that first byte is discarded */
}
static inline void Rd_normalize( struct Range_decoder * const rdec )
@@ -259,6 +260,9 @@ void LZd_flush_data( struct LZ_decoder * const decoder );
bool LZd_verify_trailer( struct LZ_decoder * const decoder,
struct Pretty_print * const pp );
+int seek_read( const int fd, uint8_t * const buf, const int size,
+ const int offset );
+
static inline uint8_t LZd_get_prev_byte( const struct LZ_decoder * const decoder )
{
const int i =
@@ -269,9 +273,14 @@ static inline uint8_t LZd_get_prev_byte( const struct LZ_decoder * const decoder
static inline uint8_t LZd_get_byte( const struct LZ_decoder * const decoder,
const int distance )
{
- int i = decoder->pos - distance - 1;
- if( i < 0 ) i += decoder->buffer_size;
- return decoder->buffer[i];
+ uint8_t b;
+ const int i = decoder->pos - distance - 1;
+ if( i >= 0 ) b = decoder->buffer[i];
+ else if( i + decoder->buffer_size >= decoder->pos )
+ b = decoder->buffer[i+decoder->buffer_size];
+ else if( seek_read( decoder->outfd, &b, 1, i - decoder->stream_pos ) != 1 )
+ { show_error( "Seek error", errno, false ); cleanup_and_fail( 1 ); }
+ return b;
}
static inline void LZd_put_byte( struct LZ_decoder * const decoder,
@@ -300,13 +309,35 @@ static inline void LZd_copy_block( struct LZ_decoder * const decoder,
}
}
+static inline void LZd_copy_block2( struct LZ_decoder * const decoder,
+ const int distance, int len )
+ {
+ if( distance < decoder->buffer_size ) /* block is in buffer */
+ { LZd_copy_block( decoder, distance, len ); return; }
+ if( len < decoder->buffer_size - decoder->pos ) /* no wrap */
+ {
+ const int offset = decoder->pos - decoder->stream_pos - distance - 1;
+ if( len <= -offset ) /* block is in file */
+ {
+ if( seek_read( decoder->outfd, decoder->buffer + decoder->pos, len, offset ) != len )
+ { show_error( "Seek error", errno, false ); cleanup_and_fail( 1 ); }
+ decoder->pos += len;
+ return;
+ }
+ }
+ for( ; len > 0; --len )
+ LZd_put_byte( decoder, LZd_get_byte( decoder, distance ) );
+ }
+
static inline bool LZd_init( struct LZ_decoder * const decoder,
const File_header header,
- struct Range_decoder * const rde, const int ofd )
+ struct Range_decoder * const rde,
+ const int buffer_size, const int ofd )
{
decoder->partial_data_pos = 0;
decoder->dictionary_size = Fh_get_dictionary_size( header );
- decoder->buffer_size = max( 65536, decoder->dictionary_size );
+ decoder->buffer_size =
+ min( buffer_size, max( 65536, decoder->dictionary_size ) );
decoder->buffer = (uint8_t *)malloc( decoder->buffer_size );
if( !decoder->buffer ) return false;
decoder->pos = 0;
diff --git a/doc/lunzip.1 b/doc/lunzip.1
index 0d10c1d..76b51e1 100644
--- a/doc/lunzip.1
+++ b/doc/lunzip.1
@@ -1,12 +1,24 @@
.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.37.1.
-.TH LUNZIP "1" "September 2013" "Lunzip 1.4" "User Commands"
+.TH LUNZIP "1" "October 2013" "Lunzip 1.5-rc1" "User Commands"
.SH NAME
Lunzip \- decompressor for lzip files
.SH SYNOPSIS
.B lunzip
[\fIoptions\fR] [\fIfiles\fR]
.SH DESCRIPTION
-Lunzip \- Decompressor for lzip files.
+Lunzip is a decompressor for lzip files. It is written in C and its
+small size makes it well suited for embedded devices or software
+installers that need to decompress files but do not need compression
+capabilities. Lunzip is fully compatible with lzip\-1.4 or newer.
+.PP
+If the size of the output buffer is specified with the '\-\-buffer\-size'
+option, lunzip uses the decompressed file as dictionary for distances
+beyond the buffer size and is able to decompress any file using as
+little memory as 50 kB, irrespective of the dictionary size used to
+compress the file. Of course, the smaller the output buffer size used in
+relation to 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.
.SH OPTIONS
.TP
\fB\-h\fR, \fB\-\-help\fR
@@ -36,6 +48,9 @@ suppress all messages
\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)
.PP
diff --git a/main.c b/main.c
index 1bf2fab..1862ffd 100644
--- a/main.c
+++ b/main.c
@@ -54,6 +54,10 @@
#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
@@ -64,12 +68,6 @@ const char * const program_name = "lunzip";
const char * const program_year = "2013";
const char * invocation_name = 0;
-#ifdef O_BINARY
-const int o_binary = O_BINARY;
-#else
-const int o_binary = 0;
-#endif
-
struct { const char * from; const char * to; } const known_extensions[] = {
{ ".lz", "" },
{ ".tlz", ".tar" },
@@ -86,7 +84,18 @@ bool delete_output_on_interrupt = false;
static void show_help( void )
{
- printf( "%s - Decompressor for lzip files.\n", Program_name );
+ printf( "Lunzip is a decompressor for lzip files. It is written in C and its\n"
+ "small size makes it well suited for embedded devices or software\n"
+ "installers that need to decompress files but do not need compression\n"
+ "capabilities. Lunzip is fully compatible with lzip-1.4 or newer.\n"
+ "\nIf the size of the output buffer is specified with the '--buffer-size'\n"
+ "option, lunzip uses the decompressed file as dictionary for distances\n"
+ "beyond the buffer size and is able to decompress any file using as\n"
+ "little memory as 50 kB, irrespective of the dictionary size used to\n"
+ "compress the file. Of course, the smaller the output buffer size used in\n"
+ "relation to the dictionary size, the more accesses to disk are needed\n"
+ "and the slower the decompression is. This 'low memory' mode only works\n"
+ "when decompressing to a regular file.\n" );
printf( "\nUsage: %s [options] [files]\n", invocation_name );
printf( "\nOptions:\n"
" -h, --help display this help and exit\n"
@@ -98,6 +107,7 @@ static void show_help( void )
" -o, --output=<file> if reading stdin, place the output into <file>\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"
"If no file names are given, lunzip decompresses from standard input to\n"
"standard output.\n"
@@ -137,6 +147,73 @@ static void show_header( const File_header header )
}
+static unsigned long getnum( const char * const ptr,
+ const unsigned long llimit,
+ const unsigned long ulimit )
+ {
+ unsigned long result;
+ char * tail;
+ errno = 0;
+ result = strtoul( ptr, &tail, 0 );
+ if( tail == ptr )
+ {
+ show_error( "Bad or missing numerical argument.", 0, true );
+ exit( 1 );
+ }
+
+ if( !errno && tail[0] )
+ {
+ int factor = ( tail[1] == 'i' ) ? 1024 : 1000;
+ int exponent = 0, i;
+ bool bad_multiplier = false;
+ switch( tail[0] )
+ {
+ case ' ': 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; else bad_multiplier = true;
+ break;
+ case 'k': if( factor == 1000 ) exponent = 1; else bad_multiplier = true;
+ break;
+ default : bad_multiplier = true;
+ }
+ if( bad_multiplier )
+ {
+ show_error( "Bad multiplier in numerical argument.", 0, true );
+ 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 )
+ {
+ show_error( "Numerical argument out of limits.", 0, false );
+ exit( 1 );
+ }
+ return result;
+ }
+
+
+static int get_dict_size( const char * const arg )
+ {
+ char * tail;
+ int bits = strtol( arg, &tail, 0 );
+ if( bits >= min_dictionary_bits &&
+ bits <= max_dictionary_bits && *tail == 0 )
+ return ( 1 << bits );
+ return getnum( arg, min_dictionary_size, max_dictionary_size );
+ }
+
+
static int extension_index( const char * const name )
{
int i;
@@ -152,9 +229,9 @@ static int extension_index( const char * const name )
static int open_instream( const char * const name, struct stat * const in_statsp,
- const bool testing, const bool to_stdout )
+ const bool no_ofile )
{
- int infd = open( name, O_RDONLY | o_binary );
+ int infd = open( name, O_RDONLY | O_BINARY );
if( infd < 0 )
{
if( verbosity >= 0 )
@@ -168,7 +245,6 @@ static int open_instream( const char * const name, struct stat * const in_statsp
const bool can_read = ( i == 0 &&
( S_ISBLK( mode ) || S_ISCHR( mode ) ||
S_ISFIFO( mode ) || S_ISSOCK( mode ) ) );
- const bool no_ofile = to_stdout || testing;
if( i != 0 || ( !S_ISREG( mode ) && ( !can_read || !no_ofile ) ) )
{
if( verbosity >= 0 )
@@ -224,7 +300,7 @@ static void set_d_outname( const char * const name, const int i )
static bool open_outstream( const bool force )
{
- int flags = O_CREAT | O_WRONLY | o_binary;
+ int flags = O_APPEND | O_CREAT | O_RDWR | O_BINARY;
if( force ) flags |= O_TRUNC; else flags |= O_EXCL;
outfd = open( output_filename, flags, outfd_mode );
@@ -263,10 +339,14 @@ 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 will in many cases return with EPERM, which can be safely ignored. */
- if( ( fchown( outfd, in_statsp->st_uid, in_statsp->st_gid ) != 0 &&
- errno != EPERM ) ||
- fchmod( outfd, in_statsp->st_mode ) != 0 ) warning = true;
+ 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 ) cleanup_and_fail( 1 );
outfd = -1;
@@ -283,8 +363,8 @@ static void close_and_set_permissions( const struct stat * const in_statsp )
}
-static int decompress( const int infd, struct Pretty_print * const pp,
- const bool testing )
+static int decompress( const int buffer_size, const int infd,
+ struct Pretty_print * const pp, const bool testing )
{
unsigned long long partial_file_pos = 0;
struct Range_decoder rdec;
@@ -292,7 +372,7 @@ static int decompress( const int infd, struct Pretty_print * const pp,
bool first_member;
if( !Rd_init( &rdec, infd ) )
{
- show_error( "Not enough memory. Find a machine with more memory.", 0, false );
+ show_error( "Not enough memory.", 0, false );
cleanup_and_fail( 1 );
}
@@ -332,9 +412,9 @@ static int decompress( const int infd, struct Pretty_print * const pp,
if( verbosity >= 2 || ( verbosity == 1 && first_member ) )
{ Pp_show_msg( pp, 0 ); if( verbosity >= 3 ) show_header( header ); }
- if( !LZd_init( &decoder, header, &rdec, outfd ) )
+ if( !LZd_init( &decoder, header, &rdec, buffer_size, outfd ) )
{
- show_error( "Not enough memory. Find a machine with more memory.", 0, false );
+ show_error( "Not enough memory. Try a smaller output buffer size.", 0, false );
cleanup_and_fail( 1 );
}
result = LZd_decode_member( &decoder, pp );
@@ -431,6 +511,7 @@ int main( const int argc, const char * const argv[] )
const char * default_output_filename = "";
const char ** filenames = 0;
int num_filenames = 0;
+ int buffer_size = max_dictionary_size;
int infd = -1;
int argind = 0;
int retval = 0;
@@ -453,6 +534,7 @@ int main( const int argc, const char * const argv[] )
{ '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 },
{ 0 , 0, ap_no } };
@@ -463,7 +545,7 @@ int main( const int argc, const char * const argv[] )
CRC32_init();
if( !ap_init( &parser, argc, argv, options, 0 ) )
- { show_error( "Memory exhausted.", 0, false ); return 1; }
+ { show_error( "Not enough memory.", 0, false ); return 1; }
if( ap_error( &parser ) ) /* bad option */
{ show_error( ap_error( &parser ), 0, true ); return 1; }
@@ -483,6 +565,7 @@ int main( const int argc, const char * const argv[] )
case 'o': default_output_filename = arg; break;
case 'q': verbosity = -1; break;
case 't': testing = true; break;
+ case 'u': buffer_size = get_dict_size( arg ); break;
case 'v': if( verbosity < 4 ) ++verbosity; break;
case 'V': show_version(); return 0;
default : internal_error( "uncaught option" );
@@ -507,6 +590,19 @@ int main( const int argc, const char * const argv[] )
if( strcmp( filenames[i], "-" ) != 0 ) filenames_given = true;
}
+ if( buffer_size < max_dictionary_size )
+ {
+ if( to_stdout || testing )
+ { show_error( "'--buffer-size' is incompatible with '--stdout' and '--test'.", 0, false );
+ return 1; }
+ if( !default_output_filename[0] )
+ for( i = 0; i < num_filenames; ++i )
+ if( !filenames[i][0] || strcmp( filenames[i], "-" ) == 0 )
+ { show_error( "Output file must be specified when decompressing from stdin with a\n"
+ " reduced buffer size.", 0, false );
+ return 1; }
+ }
+
if( !to_stdout && !testing &&
( filenames_given || default_output_filename[0] ) )
set_signals();
@@ -547,7 +643,7 @@ int main( const int argc, const char * const argv[] )
else
{
input_filename = filenames[i];
- infd = open_instream( input_filename, &in_stats, testing, to_stdout );
+ infd = open_instream( input_filename, &in_stats, to_stdout || testing );
if( infd < 0 ) { if( retval < 1 ) retval = 1; continue; }
if( !testing )
{
@@ -576,7 +672,7 @@ int main( const int argc, const char * const argv[] )
delete_output_on_interrupt = true;
in_statsp = input_filename[0] ? &in_stats : 0;
Pp_set_name( &pp, input_filename );
- tmp = decompress( infd, &pp, testing );
+ tmp = decompress( buffer_size, infd, &pp, testing );
if( tmp > retval ) retval = tmp;
if( tmp && !testing ) cleanup_and_fail( retval );
diff --git a/testsuite/check.sh b/testsuite/check.sh
index c4f612e..52d5122 100755
--- a/testsuite/check.sh
+++ b/testsuite/check.sh
@@ -27,6 +27,12 @@ fail=0
printf "testing lunzip-%s..." "$2"
+"${LZIP}" -cqu-1 "${in_lz}" > /dev/null
+if [ $? = 1 ] ; then printf . ; else fail=1 ; printf - ; fi
+"${LZIP}" -cqu0 "${in_lz}" > /dev/null
+if [ $? = 1 ] ; then printf . ; else fail=1 ; printf - ; fi
+"${LZIP}" -cqu4095 "${in_lz}" > /dev/null
+if [ $? = 1 ] ; then printf . ; else fail=1 ; printf - ; fi
"${LZIP}" -tq in
if [ $? = 2 ] ; then printf . ; else fail=1 ; printf - ; fi
"${LZIP}" -tq < in
@@ -45,11 +51,23 @@ if [ $? = 2 ] ; then printf . ; else printf - ; fail=1 ; fi
cmp in copy || fail=1
printf .
+cat "${in_lz}" > copy.lz || framework_failure
+"${LZIP}" -df copy.lz || fail=1
+cmp in copy || fail=1
+printf .
+
printf "to be overwritten" > copy || framework_failure
"${LZIP}" -df -o copy < "${in_lz}" || fail=1
cmp in copy || fail=1
printf .
+for i in 12 4096 4Ki 29 512KiB ; do
+ printf "to be overwritten" > copy || framework_failure
+ "${LZIP}" -df -u$i -o copy < "${in_lz}" || fail=1
+ cmp in copy || fail=1
+ printf .
+done
+
cat "${in_lz}" > anyothername || framework_failure
"${LZIP}" -d anyothername || fail=1
cmp in anyothername.out || fail=1
@@ -65,7 +83,7 @@ printf .
printf "garbage" >> copy2.lz || framework_failure
printf "to be overwritten" > copy2 || framework_failure
-"${LZIP}" -dfk copy2.lz || fail=1
+"${LZIP}" -df copy2.lz || fail=1
cmp in2 copy2 || fail=1
printf .