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Diffstat (limited to 'main.cc')
| -rw-r--r-- | main.cc | 1300 |
1 files changed, 1300 insertions, 0 deletions
@@ -0,0 +1,1300 @@ +/* Plzip - A parallel version of the lzip data compressor + Copyright (C) 2009 Laszlo Ersek. + Copyright (C) 2009 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 3 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/>. +*/ +/* + Return values: 0 for a normal exit, 1 for environmental problems + (file not found, invalid flags, I/O errors, etc), 2 to indicate a + corrupt or invalid input file, 3 for an internal consistency error + (eg, bug) which caused plzip to panic. +*/ + +#define _FILE_OFFSET_BITS 64 + +#include <algorithm> +#include <cassert> +#include <cerrno> +#include <climits> +#include <csignal> +#include <cstdarg> /* va_list */ +#include <cstddef> +#include <cstdio> /* flockfile() */ +#include <cstdlib> +#include <cstring> /* strerror() */ +#include <string> +#include <vector> +#include <fcntl.h> /* open() */ +#include <stdint.h> +#include <pthread.h> +#include <unistd.h> +#include <utime.h> +#include <sys/stat.h> +#include <lzlib.h> + +#if CHAR_BIT != 8 +# error "Environments where CHAR_BIT != 8 are not supported." +#endif + +#include "arg_parser.h" +#include "main.h" +#include "plzip.h" + +#ifndef LLONG_MAX +#define LLONG_MAX 0x7FFFFFFFFFFFFFFFLL +#endif +#ifndef LLONG_MIN +#define LLONG_MIN (-LLONG_MAX - 1LL) +#endif +#ifndef ULLONG_MAX +#define ULLONG_MAX 0xFFFFFFFFFFFFFFFFULL +#endif + +void internal_error( const char * msg ); +int readblock( const int fd, char * buf, const int size ) throw(); +int writeblock( const int fd, const char * buf, const int size ) throw(); + + +namespace { + +const char * invocation_name = 0; +const char * const Program_name = "Plzip"; +const char * const program_name = "plzip"; +const char * const program_year = "2009"; + +struct { const char * from; const char * to; } const known_extensions[] = { + { ".lz", "" }, + { ".tlz", ".tar" }, + { 0, 0 } }; + +struct lzma_options + { + int dictionary_size; // 4KiB..512MiB + int match_len_limit; // 5..273 + }; + +enum Mode { m_compress = 0, m_decompress, m_test }; + +std::string output_filename; +int outhandle = -1; +int verbosity = 0; +bool delete_output_on_interrupt = false; + +class Pretty_print + { + const char * const stdin_name; + const unsigned int stdin_name_len; + unsigned int longest_name; + std::string name_; + mutable bool first_post; + +public: + Pretty_print( const std::vector< std::string > & filenames ) + : stdin_name( "(stdin)" ), stdin_name_len( std::strlen( stdin_name ) ), + longest_name( 0 ), first_post( false ) + { + for( unsigned int i = 0; i < filenames.size(); ++i ) + { + const std::string & s = filenames[i]; + const unsigned int len = ( ( s == "-" ) ? stdin_name_len : s.size() ); + if( len > longest_name ) longest_name = len; + } + if( longest_name == 0 ) longest_name = stdin_name_len; + } + + void set_name( const std::string & filename ) + { + if( filename.size() && filename != "-" ) name_ = filename; + else name_ = stdin_name; + first_post = true; + } + + void reset() const throw() { if( name_.size() ) first_post = true; } + const char * name() const throw() { return name_.c_str(); } + void operator()( const char * const msg = 0 ) const throw(); + }; + + +void show_help() throw() + { + std::printf( "%s - A parallel version of the lzip data compressor.\n", Program_name ); + std::printf( "\nUsage: %s [options] [files]\n", invocation_name ); + std::printf( "\nOptions:\n" ); + std::printf( " -h, --help display this help and exit\n" ); + std::printf( " -V, --version output version information and exit\n" ); +// std::printf( " -b, --member-size=<n> set member size limit in bytes\n" ); + std::printf( " -c, --stdout send output to standard output\n" ); + std::printf( " -d, --decompress decompress\n" ); +// std::printf( " -f, --force overwrite existing output files\n" ); +// std::printf( " -k, --keep keep (don't delete) input files\n" ); +// std::printf( " -m, --match-length=<n> set match length limit in bytes [80]\n" ); + std::printf( " -n, --threads=<n> set the number of (de)compression threads\n" ); +// std::printf( " -o, --output=<file> if reading stdin, place the output into <file>\n" ); + std::printf( " -q, --quiet suppress all messages\n" ); +// std::printf( " -s, --dictionary-size=<n> set dictionary size limit in bytes [8MiB]\n" ); +// std::printf( " -S, --volume-size=<n> set volume size limit in bytes\n" ); + std::printf( " -t, --test test compressed file integrity\n" ); + std::printf( " -v, --verbose be verbose (a 2nd -v gives more)\n" ); + std::printf( " -1 .. -9 set compression level [default 6]\n" ); + std::printf( " --fast alias for -1\n" ); + std::printf( " --best alias for -9\n" ); + if( verbosity > 0 ) + { + std::printf( " -D, --debug=<level> (0-3) print debug statistics to stderr\n" ); + } + std::printf( "If no file names are given, %s compresses or decompresses\n", program_name ); + std::printf( "from standard input to standard output.\n" ); + std::printf( "Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,\n" ); + std::printf( "Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...\n" ); + std::printf( "\nReport bugs to lzip-bug@nongnu.org\n" ); + std::printf( "Lzip home page: http://www.nongnu.org/lzip/lzip.html\n" ); + } + + +void show_version() throw() + { + std::printf( "%s %s\n", Program_name, PROGVERSION ); + std::printf( "Copyright (C) 2009 Laszlo Ersek.\n" ); + std::printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year ); + std::printf( "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n" ); + std::printf( "This is free software: you are free to change and redistribute it.\n" ); + std::printf( "There is NO WARRANTY, to the extent permitted by law.\n" ); + } + + +long long getnum( const char * ptr, const int bs = 0, + const long long llimit = LLONG_MIN + 1, + const long long ulimit = LLONG_MAX ) throw() + { + errno = 0; + char *tail; + long long result = strtoll( ptr, &tail, 0 ); + if( tail == ptr ) + { + show_error( "bad or missing numerical argument", 0, true ); + std::exit( 1 ); + } + + if( !errno && tail[0] ) + { + int factor = ( tail[1] == 'i' ) ? 1024 : 1000; + int exponent = 0; + bool bad_multiplier = false; + switch( tail[0] ) + { + case ' ': break; + case 'b': if( bs > 0 ) { factor = bs; exponent = 1; } + else bad_multiplier = true; + 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 ); + std::exit( 1 ); + } + for( int i = 0; i < exponent; ++i ) + { + if( LLONG_MAX / factor >= llabs( result ) ) result *= factor; + else { errno = ERANGE; break; } + } + } + if( !errno && ( result < llimit || result > ulimit ) ) errno = ERANGE; + if( errno ) + { + show_error( "numerical argument out of limits" ); + std::exit( 1 ); + } + return result; + } + + +int get_dict_size( const char * arg ) throw() + { + char *tail; + int bits = std::strtol( arg, &tail, 0 ); + if( bits >= min_dictionary_bits && bits <= max_dictionary_bits && *tail == 0 ) + return ( 1 << bits ); + return getnum( arg, 0, min_dictionary_size, max_dictionary_size ); + } + + +int extension_index( const std::string & name ) throw() + { + for( int i = 0; known_extensions[i].from; ++i ) + { + const std::string ext( known_extensions[i].from ); + if( name.size() > ext.size() && + name.compare( name.size() - ext.size(), ext.size(), ext ) == 0 ) + return i; + } + return -1; + } + + +int open_instream( const std::string & name, struct stat * in_statsp, + const Mode program_mode, const int eindex, + const bool force, const bool to_stdout ) throw() + { + int inhandle = -1; + if( program_mode == m_compress && !force && eindex >= 0 ) + { + if( verbosity >= 0 ) + std::fprintf( stderr, "%s: input file `%s' already has `%s' suffix.\n", + program_name, name.c_str(), + known_extensions[eindex].from ); + } + else + { + inhandle = open( name.c_str(), O_RDONLY ); + if( inhandle < 0 ) + { + if( verbosity >= 0 ) + std::fprintf( stderr, "%s: Can't open input file `%s': %s.\n", + program_name, name.c_str(), std::strerror( errno ) ); + } + else + { + const int i = fstat( inhandle, in_statsp ); + const mode_t & mode = in_statsp->st_mode; + if( i < 0 || !( S_ISREG( mode ) || ( to_stdout && + ( S_ISFIFO( mode ) || S_ISSOCK( mode ) || + S_ISBLK( mode ) || S_ISCHR( mode ) ) ) ) ) + { + if( verbosity >= 0 ) + std::fprintf( stderr, "%s: input file `%s' is not a regular file%s.\n", + program_name, name.c_str(), + to_stdout ? "" : " and `--stdout' was not specified" ); + close( inhandle ); + inhandle = -1; + } + } + } + return inhandle; + } + + +void set_c_outname( const std::string & name ) throw() + { + output_filename = name; + output_filename += known_extensions[0].from; + } + + +void set_d_outname( const std::string & name, const int i ) throw() + { + if( i >= 0 ) + { + const std::string from( known_extensions[i].from ); + if( name.size() > from.size() ) + { + output_filename.assign( name, 0, name.size() - from.size() ); + output_filename += known_extensions[i].to; + return; + } + } + output_filename = name; output_filename += ".out"; + if( verbosity >= 0 ) + std::fprintf( stderr, "%s: can't guess original name for `%s' -- using `%s'.\n", + program_name, name.c_str(), output_filename.c_str() ); + } + + +bool open_outstream( const bool force ) throw() + { + if( force ) + outhandle = open( output_filename.c_str(), O_CREAT | O_TRUNC | O_WRONLY, + S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH ); + else outhandle = open( output_filename.c_str(), O_CREAT | O_EXCL | O_WRONLY, + S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH ); + if( outhandle < 0 ) + { + if( errno == EEXIST ) outhandle = -2; else outhandle = -1; + if( verbosity >= 0 ) + { + if( outhandle == -2 ) + std::fprintf( stderr, "%s: Output file %s already exists, skipping.\n", + program_name, output_filename.c_str() ); + else + std::fprintf( stderr, "%s: Can't create output file `%s': %s.\n", + program_name, output_filename.c_str(), std::strerror( errno ) ); + } + } + return ( outhandle >= 0 ); + } + + +bool check_tty( const int inhandle, const Mode program_mode ) throw() + { + if( program_mode == m_compress && isatty( outhandle ) ) + { + show_error( "I won't write compressed data to a terminal.", 0, true ); + return false; + } + if( ( program_mode == m_decompress || program_mode == m_test ) && + isatty( inhandle ) ) + { + show_error( "I won't read compressed data from a terminal.", 0, true ); + return false; + } + return true; + } + + +void cleanup_and_fail( const int retval ) throw() + { + if( delete_output_on_interrupt ) + { + if( verbosity >= 0 ) + std::fprintf( stderr, "%s: Deleting output file `%s', if it exists.\n", + program_name, output_filename.c_str() ); + if( outhandle >= 0 ) { close( outhandle ); outhandle = -1; } + if( std::remove( output_filename.c_str() ) != 0 ) + show_error( "WARNING: deletion of output file (apparently) failed." ); + } + std::exit( retval ); + } + + + // Set permissions, owner and times. +void close_and_set_permissions( const struct stat * in_statsp, int * retvalp ) + { + int tmp = 0; + if( in_statsp ) + { + if( fchmod( outhandle, in_statsp->st_mode ) != 0 ) tmp = 1; + if( !tmp ) (void)fchown( outhandle, in_statsp->st_uid, in_statsp->st_gid ); + // fchown will in many cases return with EPERM, which can be safely ignored. + } + if( close( outhandle ) == 0 ) outhandle = -1; + else cleanup_and_fail( 1 ); + delete_output_on_interrupt = false; + if( !in_statsp ) return; + if( !tmp ) + { + struct utimbuf t; + t.actime = in_statsp->st_atime; + t.modtime = in_statsp->st_mtime; + if( utime( output_filename.c_str(), &t ) != 0 ) tmp = 1; + } + if( tmp ) + { + if( tmp > *retvalp ) *retvalp = tmp; + show_error( "I can't change output file attributes." ); + cleanup_and_fail( *retvalp ); + } + } + + +int decompress( const int inhandle, const Pretty_print & pp, + const bool testing ) + { + void * decoder = LZ_decompress_open(); + if( !decoder || LZ_decompress_errno( decoder ) != LZ_ok ) + { + LZ_decompress_close( decoder ); + pp( "not enough memory. Find a machine with more memory" ); + return 1; + } + if( verbosity >= 1 ) pp(); + + const int in_buffer_size = 65536, out_buffer_size = 8 * in_buffer_size; + uint8_t in_buffer[in_buffer_size], out_buffer[out_buffer_size]; + int in_pos = 0, in_stream_pos = 0; + bool finished = false; + while( true ) + { + int in_size = 0; + if( !finished ) + { + if( in_stream_pos == 0 ) + in_stream_pos = readblock( inhandle, (char *)in_buffer, in_buffer_size ); + if( in_pos < in_stream_pos ) + { + in_size = LZ_decompress_write( decoder, in_buffer + in_pos, in_stream_pos - in_pos ); + in_pos += in_size; + } + if( in_pos >= in_stream_pos ) + { + if( in_stream_pos < in_buffer_size ) + { finished = true; LZ_decompress_finish( decoder ); } + in_stream_pos = 0; in_pos = 0; + } + } + int out_size = LZ_decompress_read( decoder, out_buffer, out_buffer_size ); +// std::fprintf( stderr, "%5d in_size, %6d out_size.\n", in_size, out_size ); + if( out_size < 0 ) + { + const LZ_errno lz_errno = LZ_decompress_errno( decoder ); + if( lz_errno == LZ_header_error ) + { + if( LZ_decompress_total_out_size( decoder ) > 0 ) + break; // trailing garbage + pp( "error reading member header" ); + return 1; + } + if( lz_errno == LZ_mem_error ) + { + pp( "not enough memory. Find a machine with more memory" ); + return 1; + } + if( lz_errno == LZ_unexpected_eof ) + { + if( verbosity >= 0 ) + { pp(); + std::fprintf( stderr, "file ends unexpectedly at pos %lld\n", + LZ_decompress_total_in_size( decoder ) ); } + return 2; + } + pp(); show_error( "read error", errno ); return 1; + } + else if( out_size > 0 && outhandle >= 0 ) + { + const int wr = writeblock( outhandle, (char *)out_buffer, out_size ); + if( wr != out_size ) + { pp(); show_error( "write error", errno ); return 1; } + } + if( LZ_decompress_finished( decoder ) == 1 ) break; + if( finished && in_size == 0 && out_size == 0 ) + internal_error( "library error (LZ_decompress_read)" ); + } + if( verbosity >= 1 ) + { if( testing ) std::fprintf( stderr, "ok\n" ); + else std::fprintf( stderr, "done\n" ); } + LZ_decompress_close( decoder ); + return 0; + } + + +extern "C" void signal_handler( int ) throw() + { + show_error( "Control-C or similar caught, quitting." ); + cleanup_and_fail( 1 ); + } + + +void set_signals() throw() + { + signal( SIGHUP, signal_handler ); + signal( SIGINT, signal_handler ); + signal( SIGTERM, signal_handler ); + } + +} // end namespace + + +void Pretty_print::operator()( const char * const msg ) const throw() + { + if( verbosity >= 0 ) + { + if( first_post ) + { + first_post = false; + std::fprintf( stderr, " %s: ", name_.c_str() ); + for( unsigned int i = 0; i < longest_name - name_.size(); ++i ) + std::fprintf( stderr, " " ); + if( !msg ) std::fflush( stderr ); + } + if( msg ) std::fprintf( stderr, "%s.\n", msg ); + } + } + + +/* Private stuff needed by fatal(). */ +static pthread_t main_thread; + +static pid_t pid; + + +/* Public utility variables and functions. */ +void *(*mallocf)(size_t size); +void (*freef)(void *ptr); + + +/* + This can be called from any thread, main thread or sub-threads alike, since + they all call common helper functions that call fatal() in case of an error. +*/ +void +fatal(void) +{ + if( pthread_equal(pthread_self(), main_thread) ) + cleanup_and_fail( 1 ); + else + { + if (0 == kill(pid, SIGUSR1)) + pthread_exit(0); + } + _exit(EXIT_FAILURE); +} + + +void +fail(const char *fmt, int err, ...) +{ + va_list args; + + /* Locking stderr should also protect strerror(). */ + flockfile(stderr); + (void)fprintf(stderr, "%s: ", program_name); + + va_start(args, err); + (void)vfprintf(stderr, fmt, args); + va_end(args); + + (void)fprintf(stderr, ": %s\n", strerror(err)); + funlockfile(stderr); + /* Stream stderr is never fully buffered originally. */ + fatal(); +} + + +void * +xalloc(size_t size) +{ + void *ret = (*mallocf)(size); + + if (0 == ret) { + fail("(*mallocf)()", errno); + } + + return ret; +} + + +void +xinit(Cond *cond) +{ + int ret; + pthread_mutexattr_t attr; + + ret = pthread_mutexattr_init(&attr); + if (0 != ret) { + fail("pthread_mutexattr_init()", ret); + } + + ret = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK); + if (0 != ret) { + fail("pthread_mutexattr_settype()", ret); + } + + ret = pthread_mutex_init(&cond->lock, &attr); + if (0 != ret) { + fail("pthread_mutex_init()", ret); + } + + ret = pthread_mutexattr_destroy(&attr); + if (0 != ret) { + fail("pthread_mutexattr_destroy()", ret); + } + + ret = pthread_cond_init(&cond->cond, 0); + if (0 != ret) { + fail("pthread_cond_init()", ret); + } + + cond->ccount = 0lu; + cond->wcount = 0lu; +} + + +void +xdestroy(Cond *cond) +{ + int ret; + + ret = pthread_cond_destroy(&cond->cond); + if (0 != ret) { + fail("pthread_cond_destroy()", ret); + } + + ret = pthread_mutex_destroy(&cond->lock); + if (0 != ret) { + fail("pthread_mutex_destroy()", ret); + } +} + + +void +xlock(Cond *cond) +{ + int ret; + + ret = pthread_mutex_lock(&cond->lock); + if (0 != ret) { + fail("pthread_mutex_lock()", ret); + } +} + + +void +xlock_pred(Cond *cond) +{ + xlock(cond); + ++cond->ccount; +} + + +void +xunlock(Cond *cond) +{ + int ret; + + ret = pthread_mutex_unlock(&cond->lock); + if (0 != ret) { + fail("pthread_mutex_unlock()", ret); + } +} + + +void +xwait(Cond *cond) +{ + int ret; + + ++cond->wcount; + ret = pthread_cond_wait(&cond->cond, &cond->lock); + if (0 != ret) { + fail("pthread_cond_wait()", ret); + } + ++cond->ccount; +} + + +void +xsignal(Cond *cond) +{ + int ret; + + ret = pthread_cond_signal(&cond->cond); + if (0 != ret) { + fail("pthread_cond_signal()", ret); + } +} + + +void +xbroadcast(Cond *cond) +{ + int ret; + + ret = pthread_cond_broadcast(&cond->cond); + if (0 != ret) { + fail("pthread_cond_broadcast()", ret); + } +} + + +void +xcreate(pthread_t *thread, void *(*routine)(void *), void *arg) +{ + int ret; + + ret = pthread_create(thread, 0, routine, arg); + if (0 != ret) { + fail("pthread_create()", ret); + } +} + + +void +xjoin(pthread_t thread) +{ + int ret; + + ret = pthread_join(thread, 0); + if (0 != ret) { + fail("pthread_join()", ret); + } +} + + +void +xraise(int sig) +{ + if (-1 == kill(pid, sig)) { + fail("kill()", errno); + } +} + + +/* Private stuff part 2. */ + +struct Opts +{ + unsigned num_worker; /* Start this many worker threads. */ + unsigned clidx; /* Compression level index in [0u .. 8u]. */ + int print_cctrs; /* Print condition variable counters. */ +}; + +/* Backlog factor for all workers together. */ +static const unsigned blf = 3u; + +/* Separator characters in environment variable values. No escaping. */ +static const char envsep[] = " \t"; + + +static void * +trace_malloc(size_t size) +{ + void *ret; + int save_errno = 0; + + ret = malloc(size); + if (0 == ret) { + save_errno = errno; + } + + if (0 > fprintf(stderr, "%lu: malloc(%lu) == %p\n", (long unsigned)pid, + (long unsigned)size, ret) + ) { + fatal(); + } + + if (0 == ret) { + errno = save_errno; + } + + return ret; +} + + +static void +trace_free(void *ptr) +{ + if (0 > fprintf(stderr, "%lu: free(%p)\n", (long unsigned)pid, ptr)) { + fatal(); + } + free(ptr); +} + + +static void +xsigemptyset(sigset_t *set) +{ + if (-1 == sigemptyset(set)) { + fail("sigemptyset()", errno); + } +} + + +static void +xsigaddset(sigset_t *set, int signo) +{ + if (-1 == sigaddset(set, signo)) { + fail("sigaddset()", errno); + } +} + + +static void +xsigmask(int how, const sigset_t *set, sigset_t *oset) +{ + int ret; + + ret = pthread_sigmask(how, set, oset); + if (0 != ret) { + fail("pthread_sigmask()", ret); + } +} + + +static void +xsigaction(int sig, void (*handler)(int)) +{ + struct sigaction act; + + act.sa_handler = handler; + xsigemptyset(&act.sa_mask); + act.sa_flags = 0; + + if (-1 == sigaction(sig, &act, 0)) { + fail("sigaction()", errno); + } +} + + +enum caught_sig +{ + CS_INT = 1, + CS_TERM, + CS_USR1, + CS_USR2 +}; + +static volatile sig_atomic_t caught_sig; + + +static void +sighandler(int sig) +{ + /* sig_atomic_t is nowhere required to be able to hold signal values. */ + switch (sig) { + case SIGINT: + caught_sig = CS_INT; + break; + + case SIGTERM: + caught_sig = CS_TERM; + break; + + case SIGUSR1: + caught_sig = CS_USR1; + break; + + case SIGUSR2: + caught_sig = CS_USR2; + break; + + default: + assert(0); + } +} + + +static void +process( const Opts *opts, unsigned num_slot, + int infd, int outfd, const Pretty_print & pp, const sigset_t *unblocked ) +{ + /* + We could wait for signals with either sigwait() or sigsuspend(). SUSv2 + states about sigwait() that its effect on signal actions is unspecified. + SUSv3 still claims the same. + + The SUSv2 description of sigsuspend() talks about both the thread and the + whole process being suspended until a signal arrives, although thread + suspension seems much more likely from the wording. They note that they + filed a clarification request for this. SUSv3 cleans this up and chooses + thread suspension which was more logical anyway. + + I favor sigsuspend() because I need to re-raise SIGTERM and SIGINT, and + unspecified action behavior with sigwait() seems messy. + + 13-OCT-2009 lacos + */ + + Plzip_arg muxer_arg; + pthread_t muxer; + + if( verbosity >= 1 ) pp( "" ); + + muxer_arg.num_worker = opts->num_worker; + muxer_arg.num_slot = num_slot; + muxer_arg.clidx = opts->clidx; + muxer_arg.print_cctrs = opts->print_cctrs; + muxer_arg.infd = infd; + muxer_arg.outfd = outfd; + xcreate(&muxer, plzip_wrap, &muxer_arg); + + /* Unblock signals, wait for them, then block them again. */ + { + int ret = sigsuspend(unblocked); + assert(-1 == ret && EINTR == errno); + } + + switch (caught_sig) { + case CS_INT: + case CS_TERM: // FIXME remove output file + { + int sig; + sigset_t mask; + + sig = (CS_INT == caught_sig) ? SIGINT : SIGTERM; + /* + We might have inherited a SIG_IGN from the parent, but that would + make no sense here. 24-OCT-2009 lacos + */ + xsigaction(sig, SIG_DFL); + xraise(sig); + + xsigemptyset(&mask); + xsigaddset(&mask, sig); + xsigmask(SIG_UNBLOCK, &mask, 0); + } + /* + We shouldn't reach this point, but if we do for some reason, fall + through. + */ + + case CS_USR1: + /* Error from a non-main thread via fatal(). */ + fatal(); + + case CS_USR2: + /* Muxer thread joined other sub-threads and finished successfully. */ + break; + + default: + assert(0); + } + + xjoin(muxer); +} + + +static void +sigs_mod(int block_n_catch, sigset_t *oset) +{ + void (*handler)(int); + + if (block_n_catch) { + sigset_t mask; + + xsigemptyset(&mask); + xsigaddset(&mask, SIGINT); + xsigaddset(&mask, SIGTERM); + xsigaddset(&mask, SIGUSR1); + xsigaddset(&mask, SIGUSR2); + xsigmask(SIG_BLOCK, &mask, oset); + + handler = sighandler; + } + else { + handler = SIG_DFL; + } + + xsigaction(SIGINT, handler); + xsigaction(SIGTERM, handler); + xsigaction(SIGUSR1, handler); + xsigaction(SIGUSR2, handler); + + if (!block_n_catch) { + xsigmask(SIG_SETMASK, oset, 0); + } +} + + +void show_error( const char * msg, const int errcode, const bool help ) throw() + { + if( verbosity >= 0 ) + { + if( msg && msg[0] != 0 ) + { + std::fprintf( stderr, "%s: %s", program_name, msg ); + if( errcode > 0 ) std::fprintf( stderr, ": %s", std::strerror( errcode ) ); + std::fprintf( stderr, "\n" ); + } + if( help && invocation_name && invocation_name[0] != 0 ) + std::fprintf( stderr, "Try `%s --help' for more information.\n", invocation_name ); + } + } + + +void internal_error( const char * msg ) + { + std::string s( "internal error: " ); s += msg; + show_error( s.c_str() ); + std::exit( 3 ); + } + + +// Returns the number of bytes really read. +// If (returned value < size) and (errno == 0), means EOF was reached. +// +int readblock( const int fd, char * buf, const int size ) throw() + { + int rest = size; + errno = 0; + while( rest > 0 ) + { + errno = 0; + const int n = read( fd, buf + size - rest, rest ); + if( n > 0 ) rest -= n; + else if( n == 0 ) break; + else if( errno != EINTR && errno != EAGAIN ) break; + } + return ( rest > 0 ) ? size - rest : size; + } + + +// Returns the number of bytes really written. +// If (returned value < size), it is always an error. +// +int writeblock( const int fd, const char * buf, const int size ) throw() + { + int rest = size; + errno = 0; + while( rest > 0 ) + { + errno = 0; + const int n = write( fd, buf + size - rest, rest ); + if( n > 0 ) rest -= n; + else if( errno && errno != EINTR && errno != EAGAIN ) break; + } + return ( rest > 0 ) ? size - rest : size; + } + + +int main( const int argc, const char * argv[] ) + { + Opts opts; + // Mapping from gzip/bzip2 style 1..9 compression modes + // to the corresponding LZMA compression modes. + const lzma_options option_mapping[] = + { + { 1 << 20, 10 }, // -1 + { 1 << 20, 12 }, // -2 + { 1 << 20, 17 }, // -3 + { 1 << 21, 26 }, // -4 + { 1 << 22, 44 }, // -5 + { 1 << 23, 80 }, // -6 + { 1 << 24, 108 }, // -7 + { 1 << 24, 163 }, // -8 + { 1 << 25, 273 } }; // -9 + lzma_options encoder_options = option_mapping[5]; // default = "-6" + int inhandle = -1; + Mode program_mode = m_compress; + bool force = false; + bool keep_input_files = false; + bool to_stdout = false; + std::string input_filename; + std::string default_output_filename; + std::vector< std::string > filenames; + invocation_name = argv[0]; + + if( LZ_version()[0] != LZ_version_string[0] ) + internal_error( "bad library version" ); + + main_thread = pthread_self(); + pid = getpid(); + + mallocf = malloc; + freef = free; + + xsigaction(SIGPIPE, SIG_IGN); + xsigaction(SIGXFSZ, SIG_IGN); + + /* Effectuate option defaults. */ + long max_worker = sysconf(_SC_THREAD_THREADS_MAX); + if (-1L == max_worker) { + max_worker = LONG_MAX; + } + if (UINT_MAX < (long unsigned)max_worker) { + max_worker = UINT_MAX; + } + if (UINT_MAX / blf < (unsigned)max_worker) { + max_worker = UINT_MAX / blf; + } + if ((size_t)-1 / sizeof(pthread_t) < (unsigned)max_worker) { + max_worker = (size_t)-1 / sizeof(pthread_t); + } + + opts.num_worker = 0u; + opts.clidx = 5u; + opts.print_cctrs = 0; + + const Arg_parser::Option options[] = + { + { '1', "fast", Arg_parser::no }, + { '2', 0, Arg_parser::no }, + { '3', 0, Arg_parser::no }, + { '4', 0, Arg_parser::no }, + { '5', 0, Arg_parser::no }, + { '6', 0, Arg_parser::no }, + { '7', 0, Arg_parser::no }, + { '8', 0, Arg_parser::no }, + { '9', "best", Arg_parser::no }, + { 'b', "member-size", Arg_parser::yes }, + { 'c', "stdout", Arg_parser::no }, + { 'd', "decompress", Arg_parser::no }, + { 'D', "debug", Arg_parser::yes }, + { 'f', "force", Arg_parser::no }, + { 'h', "help", Arg_parser::no }, + { 'k', "keep", Arg_parser::no }, + { 'm', "match-length", Arg_parser::yes }, + { 'n', "threads", Arg_parser::yes }, + { 'o', "output", Arg_parser::yes }, + { 'q', "quiet", Arg_parser::no }, + { 's', "dictionary-size", Arg_parser::yes }, + { 'S', "volume-size", Arg_parser::yes }, + { 't', "test", Arg_parser::no }, + { 'v', "verbose", Arg_parser::no }, + { 'V', "version", Arg_parser::no }, + { 0 , 0, Arg_parser::no } }; + + Arg_parser parser( argc, argv, options ); + if( parser.error().size() ) // bad option + { show_error( parser.error().c_str(), 0, true ); return 1; } + + int argind = 0; + for( ; argind < parser.arguments(); ++argind ) + { + const int code = parser.code( argind ); + if( !code ) break; // no more options + const char * arg = parser.argument( argind ).c_str(); + switch( code ) + { + case '1': case '2': case '3': + case '4': case '5': case '6': + case '7': case '8': case '9': + opts.clidx = code - '1'; + encoder_options = option_mapping[code-'1']; break; + case 'c': to_stdout = true; break; + case 'd': program_mode = m_decompress; break; + case 'D': { int debug_level = getnum( arg, 0, 0, 3 ); + if( debug_level & 1 ) opts.print_cctrs = 1; + if( debug_level & 2 ) + { mallocf = trace_malloc; freef = trace_free; } } + break; + case 'f': force = true; break; + case 'h': show_help(); return 0; + case 'k': keep_input_files = true; break; + case 'm': encoder_options.match_len_limit = + getnum( arg, 0, 5, 273 ); break; + case 'o': default_output_filename = arg; break; + case 'n': opts.num_worker = getnum( arg, 0, 1, max_worker ); break; + case 'q': verbosity = -1; break; + case 's': encoder_options.dictionary_size = get_dict_size( arg ); + break; + case 't': program_mode = m_test; break; + case 'v': if( verbosity < 4 ) ++verbosity; break; + case 'V': show_version(); return 0; + default : internal_error( "uncaught option" ); + } + } + + if( opts.num_worker <= 0 ) + { +#ifdef _SC_NPROCESSORS_ONLN + long num_online = sysconf( _SC_NPROCESSORS_ONLN ); + if( num_online <= 0 ) + { + show_error( "number of online processors unavailable.", 0, true ); + fatal(); + } + opts.num_worker = std::min( num_online, max_worker ); +#else + show_error( "number of (de)compression threads not set.", 0, true ); + fatal(); +#endif + } + assert(UINT_MAX / blf >= opts.num_worker); + unsigned num_slot = opts.num_worker * blf; + + bool filenames_given = false; + for( ; argind < parser.arguments(); ++argind ) + { + if( parser.argument( argind ) != "-" ) filenames_given = true; + filenames.push_back( parser.argument( argind ) ); + } + + if( filenames.empty() ) filenames.push_back("-"); + if( filenames_given && program_mode != m_compress ) set_signals(); + + Pretty_print pp( filenames ); + if( program_mode == m_test ) + outhandle = -1; + + int retval = 0; + for( unsigned int i = 0; i < filenames.size(); ++i ) + { + struct stat in_stats; + output_filename.clear(); + + if( !filenames[i].size() || filenames[i] == "-" ) + { + input_filename.clear(); + inhandle = STDIN_FILENO; + if( program_mode != m_test ) + { + if( to_stdout || !default_output_filename.size() ) + outhandle = STDOUT_FILENO; + else + { + if( program_mode == m_compress ) + set_c_outname( default_output_filename ); + else output_filename = default_output_filename; + if( !open_outstream( force ) ) + { + if( outhandle == -1 && retval < 1 ) retval = 1; + close( inhandle ); inhandle = -1; + continue; + } + } + } + } + else + { + input_filename = filenames[i]; + const int eindex = extension_index( input_filename ); + inhandle = open_instream( input_filename, &in_stats, program_mode, + eindex, force, to_stdout ); + if( inhandle < 0 ) { if( retval < 1 ) retval = 1; continue; } + if( program_mode != m_test ) + { + if( to_stdout ) outhandle = STDOUT_FILENO; + else + { + if( program_mode == m_compress ) + set_c_outname( input_filename ); + else set_d_outname( input_filename, eindex ); + if( !open_outstream( force ) ) + { + if( outhandle == -1 && retval < 1 ) retval = 1; + close( inhandle ); inhandle = -1; + continue; + } + } + } + } + + if( !check_tty( inhandle, program_mode ) ) return 1; + + if( output_filename.size() && !to_stdout && program_mode != m_test ) + delete_output_on_interrupt = true; + const struct stat * in_statsp = input_filename.size() ? &in_stats : 0; + pp.set_name( input_filename ); + int tmp = 0; + if( program_mode == m_compress ) + { + sigset_t unblocked; + sigs_mod(1, &unblocked); + process( &opts, num_slot, inhandle, outhandle, pp, &unblocked ); + sigs_mod(0, &unblocked); + } + else + tmp = decompress( inhandle, pp, program_mode == m_test ); + if( tmp > retval ) retval = tmp; + if( tmp && program_mode != m_test ) cleanup_and_fail( retval ); + + if( delete_output_on_interrupt ) + close_and_set_permissions( in_statsp, &retval ); + if( input_filename.size() ) + { + close( inhandle ); inhandle = -1; + if( !keep_input_files && !to_stdout && program_mode != m_test ) + std::remove( input_filename.c_str() ); + } + } + if( outhandle >= 0 && close( outhandle ) != 0 ) + { + if( verbosity >= 0 ) + std::fprintf( stderr, "%s: Can't close stdout: %s.\n", + program_name, std::strerror( errno ) ); + if( retval < 1 ) retval = 1; + } + return retval; + } |