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Diffstat (limited to '')
| -rw-r--r-- | main.c | 899 |
1 files changed, 899 insertions, 0 deletions
@@ -0,0 +1,899 @@ +/* Clzip - A data compressor based on the LZMA algorithm + Copyright (C) 2010 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 clzip to panic. +*/ + +#define _FILE_OFFSET_BITS 64 + +#include <errno.h> +#include <limits.h> +#include <signal.h> +#include <stdio.h> +#include <stdbool.h> +#include <stdlib.h> +#include <string.h> +#include <fcntl.h> +#include <stdint.h> +#include <unistd.h> +#include <utime.h> +#include <sys/stat.h> + +#include "carg_parser.h" +#include "clzip.h" +#include "decoder.h" +#include "encoder.h" + +#if CHAR_BIT != 8 +#error "Environments where CHAR_BIT != 8 are not supported." +#endif + +#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 + + +const char * invocation_name = 0; +const char * const Program_name = "Clzip"; +const char * const program_name = "clzip"; +const char * const program_year = "2010"; + +#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" }, + { 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 }; + +char * output_filename = 0; +int outfd = -1; +bool delete_output_on_interrupt = false; + + +// assure at least a minimum size for buffer `buf' +inline void * resize_buffer( void * buf, const int min_size ) + { + if( buf ) buf = realloc( buf, min_size ); + else buf = malloc( min_size ); + return buf; + } + + +static void show_help() + { + printf( "%s - A data compressor based on the LZMA algorithm.\n", Program_name ); + printf( "\nUsage: %s [options] [files]\n", invocation_name ); + printf( "\nOptions:\n" ); + printf( " -h, --help display this help and exit\n" ); + printf( " -V, --version output version information and exit\n" ); + printf( " -b, --member-size=<n> set member size limit in bytes\n" ); + printf( " -c, --stdout send output to standard output\n" ); + printf( " -d, --decompress decompress\n" ); + printf( " -f, --force overwrite existing output files\n" ); + printf( " -k, --keep keep (don't delete) input files\n" ); + printf( " -m, --match-length=<n> set match length limit in bytes [80]\n" ); + printf( " -o, --output=<file> if reading stdin, place the output into <file>\n" ); + printf( " -q, --quiet suppress all messages\n" ); + printf( " -s, --dictionary-size=<n> set dictionary size limit in bytes [8MiB]\n" ); + printf( " -S, --volume-size=<n> set volume size limit in bytes\n" ); + printf( " -t, --test test compressed file integrity\n" ); + printf( " -v, --verbose be verbose (a 2nd -v gives more)\n" ); + printf( " -1 .. -9 set compression level [default 6]\n" ); + printf( " --fast alias for -1\n" ); + printf( " --best alias for -9\n" ); + printf( "If no file names are given, %s compresses or decompresses\n", program_name ); + printf( "from standard input to standard output.\n" ); + printf( "Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,\n" ); + printf( "Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...\n" ); + printf( "\nReport bugs to lzip-bug@nongnu.org\n" ); + printf( "Clzip home page: http://www.nongnu.org/lzip/clzip.html\n" ); + } + + +static void show_version() + { + printf( "%s %s\n", Program_name, PROGVERSION ); + printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year ); + printf( "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n" ); + printf( "This is free software: you are free to change and redistribute it.\n" ); + printf( "There is NO WARRANTY, to the extent permitted by law.\n" ); + } + + +static const char * format_num( long long num, long long limit, + const int set_prefix ) + { + const char * const si_prefix[8] = + { "k", "M", "G", "T", "P", "E", "Z", "Y" }; + const char * const binary_prefix[8] = + { "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi" }; + static bool si = false; + static char buf[16]; + + if( set_prefix ) si = ( set_prefix > 0 ); + const int factor = ( si ) ? 1000 : 1024; + const char * const *prefix = ( si ) ? si_prefix : binary_prefix; + const char *p = ""; + limit = max( 999LL, min( 999999LL, limit ) ); + + for( int i = 0; i < 8 && ( llabs( num ) > limit || + ( llabs( num ) >= factor && num % factor == 0 ) ); ++i ) + { num /= factor; p = prefix[i]; } + snprintf( buf, sizeof buf, "%lld %s", num, p ); + return buf; + } + + +static long long getnum( const char * const ptr, const int bs, + const long long llimit, const long long ulimit ) + { + errno = 0; + char *tail; + long long result = strtoll( 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; + 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 ); + 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", 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, 0, min_dictionary_size, max_dictionary_size ); + } + + +static int extension_index( const char * const name ) + { + for( int i = 0; known_extensions[i].from; ++i ) + { + const char * const ext = known_extensions[i].from; + if( strlen( name ) > strlen( ext ) && + strncmp( name + strlen( name ) - strlen( ext ), ext, strlen( ext ) ) == 0 ) + return i; + } + return -1; + } + + +static int open_instream( const char * const name, struct stat * const in_statsp, + const enum Mode program_mode, const int eindex, + const bool force, const bool to_stdout ) + { + int infd = -1; + if( program_mode == m_compress && !force && eindex >= 0 ) + { + if( verbosity >= 0 ) + fprintf( stderr, "%s: input file `%s' already has `%s' suffix.\n", + program_name, name, known_extensions[eindex].from ); + } + else + { + infd = open( name, O_RDONLY | o_binary ); + if( infd < 0 ) + { + if( verbosity >= 0 ) + fprintf( stderr, "%s: Can't open input file `%s': %s.\n", + program_name, name, strerror( errno ) ); + } + else + { + const int i = fstat( infd, 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 ) + fprintf( stderr, "%s: input file `%s' is not a regular file%s.\n", + program_name, name, + to_stdout ? "" : " and `--stdout' was not specified" ); + close( infd ); + infd = -1; + } + } + } + return infd; + } + + +static void set_c_outname( const char * const name, const bool multifile ) + { + output_filename = resize_buffer( output_filename, strlen( name ) + 5 + + strlen( known_extensions[0].from ) + 1 ); + strcpy( output_filename, name ); + if( multifile ) strcat( output_filename, "00001" ); + strcat( output_filename, known_extensions[0].from ); + } + + +static void set_d_outname( const char * const name, const int i ) + { + if( i >= 0 ) + { + const char * const from = known_extensions[i].from; + if( strlen( name ) > strlen( from ) ) + { + output_filename = resize_buffer( output_filename, strlen( name ) + + strlen( known_extensions[0].to ) + 1 ); + strcpy( output_filename, name ); + strcpy( output_filename + strlen( name ) - strlen( from ), + known_extensions[i].to ); + return; + } + } + output_filename = resize_buffer( output_filename, strlen( name ) + 4 + 1 ); + strcpy( output_filename, name ); + strcat( output_filename, ".out" ); + if( verbosity >= 0 ) + fprintf( stderr, "%s: can't guess original name for `%s' -- using `%s'.\n", + program_name, name, output_filename ); + } + + +static bool open_outstream( const bool force ) + { + int flags = O_CREAT | O_WRONLY | o_binary; + if( force ) flags |= O_TRUNC; else flags |= O_EXCL; + + outfd = open( output_filename, flags, + S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH ); + if( outfd < 0 ) + { + if( errno == EEXIST ) outfd = -2; else outfd = -1; + if( verbosity >= 0 ) + { + if( outfd == -2 ) + fprintf( stderr, "%s: Output file %s already exists, skipping.\n", + program_name, output_filename ); + else + fprintf( stderr, "%s: Can't create output file `%s': %s.\n", + program_name, output_filename, strerror( errno ) ); + } + } + return ( outfd >= 0 ); + } + + +static bool check_tty( const int infd, const enum Mode program_mode ) + { + if( program_mode == m_compress && isatty( outfd ) ) + { + 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( infd ) ) + { + show_error( "I won't read compressed data from a terminal.", 0, true ); + return false; + } + return true; + } + + + // Set permissions, owner and times. +static void close_and_set_permissions( const struct stat * const in_statsp ) + { + bool error = false; + if( in_statsp ) + { + if( fchmod( outfd, in_statsp->st_mode ) != 0 ) error = true; + else (void)fchown( outfd, in_statsp->st_uid, in_statsp->st_gid ); + // fchown will in many cases return with EPERM, which can be safely ignored. + } + if( close( outfd ) == 0 ) outfd = -1; + else cleanup_and_fail( 1 ); + delete_output_on_interrupt = false; + if( !in_statsp ) return; + if( !error ) + { + struct utimbuf t; + t.actime = in_statsp->st_atime; + t.modtime = in_statsp->st_mtime; + if( utime( output_filename, &t ) != 0 ) error = true; + } + if( error ) + { + show_error( "I can't change output file attributes.", 0, false ); + cleanup_and_fail( 1 ); + } + } + + +static bool next_filename() + { + const unsigned int len = strlen( known_extensions[0].from ); + if( strlen( output_filename ) >= len + 5 ) // "*00001.lz" + for( int i = strlen( output_filename ) - len - 1, j = 0; j < 5; --i, ++j ) + { + if( output_filename[i] < '9' ) { ++output_filename[i]; return true; } + else output_filename[i] = '0'; + } + return false; + } + + +static int compress( const long long member_size, const long long volume_size, + const struct Lzma_options * const encoder_options, const int infd, + struct Pretty_print * const pp, const struct stat * const in_statsp ) + { + if( verbosity >= 1 ) Pp_show_msg( pp, 0 ); + File_header header; + Fh_set_magic( header ); + if( !Fh_set_dictionary_size( header, encoder_options->dictionary_size ) || + encoder_options->match_len_limit < min_match_len_limit || + encoder_options->match_len_limit > max_match_len ) + internal_error( "invalid argument to encoder" ); + + struct Matchfinder matchfinder; + Mf_init( &matchfinder, Fh_get_dictionary_size( header ), + encoder_options->match_len_limit, infd ); + Fh_set_dictionary_size( header, Mf_dictionary_size( &matchfinder ) ); + + long long in_size = 0, out_size = 0, partial_volume_size = 0; + int retval = 0; + while( true ) // encode one member per iteration + { + struct LZ_encoder encoder; + LZe_init( &encoder, &matchfinder, header, outfd ); + const long long size = + min( member_size, volume_size - partial_volume_size ); + if( !LZe_encode_member( &encoder, size ) ) + { Pp_show_msg( pp, 0 ); show_error( "encoder error", 0, false ); + retval = 1; break; } + in_size += Mf_data_position( &matchfinder ); + out_size += LZe_member_position( &encoder ); + partial_volume_size += LZe_member_position( &encoder ); + LZe_free( &encoder ); + if( Mf_finished( &matchfinder ) ) break; + if( partial_volume_size >= volume_size - min_dictionary_size ) + { + partial_volume_size = 0; + if( delete_output_on_interrupt ) + { + close_and_set_permissions( in_statsp ); + if( !next_filename() ) + { Pp_show_msg( pp, 0 ); + show_error( "too many volume files", 0, false ); + retval = 1; break; } + if( !open_outstream( true ) ) { retval = 1; break; } + delete_output_on_interrupt = true; + } + } + if( !Mf_reset( &matchfinder ) ) + { Pp_show_msg( pp, 0 ); show_error( "can't reset matchfinder", 0, false ); + retval = 1; break; } + } + + if( retval == 0 && verbosity >= 1 ) + { + if( in_size <= 0 || out_size <= 0 ) + fprintf( stderr, "no data compressed.\n" ); + else + fprintf( stderr, "%6.3f:1, %6.3f bits/byte, " + "%5.2f%% saved, %lld in, %lld out.\n", + (double)in_size / out_size, + ( 8.0 * out_size ) / in_size, + 100.0 * ( 1.0 - ( (double)out_size / in_size ) ), + in_size, out_size ); + } + Mf_free( &matchfinder ); + return retval; + } + + +static int decompress( const int infd, struct Pretty_print * const pp, + const bool testing ) + { + struct Input_buffer ibuf; + Ib_init( &ibuf, infd ); + long long partial_file_pos = 0; + int retval = 0; + + for( bool first_member = true; ; first_member = false, Pp_reset( pp ) ) + { + File_header header; + for( unsigned int i = 0; i < sizeof (File_header); ++i ) + header[i] = Ib_get_byte( &ibuf ); + if( Ib_finished( &ibuf ) ) // End Of File + { + if( !first_member ) break; + Pp_show_msg( pp, "error reading member header" ); retval = 1; break; + } + if( !Fh_verify_magic( header ) ) + { + if( !first_member ) break; // trailing garbage + Pp_show_msg( pp, "bad magic number (file not in lzip format)" ); + retval = 2; break; + } + if( !Fh_verify_version( header ) ) + { + if( verbosity >= 0 ) + { Pp_show_msg( pp, 0 ); + fprintf( stderr, "version %d member format not supported, newer %s needed.\n", + Fh_version( header ), program_name ); } + retval = 2; break; + } + if( Fh_get_dictionary_size( header ) < min_dictionary_size || + Fh_get_dictionary_size( header ) > max_dictionary_size ) + { Pp_show_msg( pp, "invalid dictionary size in member header" ); + retval = 2; break; } + + if( verbosity >= 1 ) + { + Pp_show_msg( pp, 0 ); + if( verbosity >= 2 ) + fprintf( stderr, "version %d, dictionary size %7sB. ", + Fh_version( header ), + format_num( Fh_get_dictionary_size( header ), 9999, 0 ) ); + } + struct LZ_decoder decoder; + LZd_init( &decoder, header, &ibuf, outfd ); + + const int result = LZd_decode_member( &decoder, pp ); + partial_file_pos += LZd_member_position( &decoder ); + LZd_free( &decoder ); + if( result != 0 ) + { + if( verbosity >= 0 && result <= 2 ) + { + Pp_show_msg( pp, 0 ); + if( result == 2 ) + fprintf( stderr, "file ends unexpectedly at pos %lld\n", + partial_file_pos ); + else + fprintf( stderr, "decoder error at pos %lld\n", partial_file_pos ); + } + retval = 2; break; + } + if( verbosity >= 1 ) + { if( testing ) fprintf( stderr, "ok\n" ); + else fprintf( stderr, "done\n" ); } + } + Ib_free( &ibuf ); + return retval; + } + + +void signal_handler( int sig ) + { + sig = 0; // keep compiler happy + show_error( "Control-C or similar caught, quitting.", 0, false ); + cleanup_and_fail( 1 ); + } + + +static void set_signals() + { + signal( SIGHUP, signal_handler ); + signal( SIGINT, signal_handler ); + signal( SIGTERM, signal_handler ); + } + + +int verbosity = 0; + + +void Pp_init( struct Pretty_print * const pp, const char * const filenames[], + const int num_filenames ) + { + pp->name_ = 0; + pp->stdin_name = "(stdin)"; + pp->longest_name = 0; + pp->first_post = false; + unsigned int stdin_name_len = strlen( pp->stdin_name ); + + for( int i = 0; i < num_filenames; ++i ) + { + const char * const s = filenames[i]; + const int len = ( !strcmp( s, "-" ) ? stdin_name_len : strlen( s ) ); + if( len > pp->longest_name ) pp->longest_name = len; + } + if( pp->longest_name == 0 ) pp->longest_name = stdin_name_len; + } + + +void Pp_show_msg( struct Pretty_print * const pp, const char * const msg ) + { + if( verbosity >= 0 ) + { + if( pp->first_post ) + { + pp->first_post = false; + fprintf( stderr, " %s: ", pp->name_ ); + const int len = pp->longest_name - strlen( pp->name_ ); + for( int i = 0; i < len; ++i ) fprintf( stderr, " " ); + if( !msg ) fflush( stderr ); + } + if( msg ) fprintf( stderr, "%s.\n", msg ); + } + } + + +void cleanup_and_fail( const int retval ) + { + if( delete_output_on_interrupt ) + { + if( verbosity >= 0 ) + fprintf( stderr, "%s: Deleting output file `%s', if it exists.\n", + program_name, output_filename ); + if( outfd >= 0 ) { close( outfd ); outfd = -1; } + if( remove( output_filename ) != 0 ) + show_error( "WARNING: deletion of output file (apparently) failed.", 0, false ); + } + exit( retval ); + } + + +void show_error( const char * const msg, const int errcode, const bool help ) + { + if( verbosity >= 0 ) + { + if( msg && msg[0] != 0 ) + { + fprintf( stderr, "%s: %s", program_name, msg ); + if( errcode > 0 ) fprintf( stderr, ": %s", strerror( errcode ) ); + fprintf( stderr, "\n" ); + } + if( help && invocation_name && invocation_name[0] != 0 ) + fprintf( stderr, "Try `%s --help' for more information.\n", invocation_name ); + } + } + + +void internal_error( const char * const msg ) + { + const char * const e = "internal error: "; + char * s = resize_buffer( 0, strlen( e ) + strlen( msg ) + 1 ); + strcpy( s, e ); + strcat( s, msg ); + show_error( s, 0, false ); + free( s ); + 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, uint8_t * const buf, const int size ) + { + 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 uint8_t * const buf, const int size ) + { + 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; + } + + +CRC32 crc32; + +int main( const int argc, const char * const argv[] ) + { + // Mapping from gzip/bzip2 style 1..9 compression modes + // to the corresponding LZMA compression modes. + const struct Lzma_options option_mapping[] = + { + { 1 << 20, 10 }, // -1 + { 3 << 19, 12 }, // -2 + { 1 << 21, 17 }, // -3 + { 3 << 20, 26 }, // -4 + { 1 << 22, 44 }, // -5 + { 1 << 23, 80 }, // -6 + { 1 << 24, 108 }, // -7 + { 3 << 23, 163 }, // -8 + { 1 << 25, 273 } }; // -9 + struct Lzma_options encoder_options = option_mapping[5]; // default = "-6" + long long member_size = LLONG_MAX; + long long volume_size = LLONG_MAX; + int infd = -1; + enum Mode program_mode = m_compress; + bool force = false; + bool keep_input_files = false; + bool to_stdout = false; + const char * input_filename = ""; + const char * default_output_filename = ""; + const char ** filenames = 0; + int num_filenames = 0; + invocation_name = argv[0]; + CRC32_init(); + + const struct ap_Option options[] = + { + { '1', "fast", ap_no }, + { '2', 0, ap_no }, + { '3', 0, ap_no }, + { '4', 0, ap_no }, + { '5', 0, ap_no }, + { '6', 0, ap_no }, + { '7', 0, ap_no }, + { '8', 0, ap_no }, + { '9', "best", ap_no }, + { 'b', "member-size", ap_yes }, + { 'c', "stdout", ap_no }, + { 'd', "decompress", ap_no }, + { 'f', "force", ap_no }, + { 'h', "help", ap_no }, + { 'k', "keep", ap_no }, + { 'm', "match-length", ap_yes }, + { 'o', "output", ap_yes }, + { 'q', "quiet", ap_no }, + { 's', "dictionary-size", ap_yes }, + { 'S', "volume-size", ap_yes }, + { 't', "test", ap_no }, + { 'v', "verbose", ap_no }, + { 'V', "version", ap_no }, + { 0 , 0, ap_no } }; + + struct Arg_parser parser; + if( !ap_init( &parser, argc, argv, options, 0 ) ) + { show_error( "Memory exhausted", 0, 0 ); return 1; } + if( ap_error( &parser ) ) // bad option + { show_error( ap_error( &parser ), 0, 1 ); return 1; } + + int argind = 0; + for( ; argind < ap_arguments( &parser ); ++argind ) + { + const int code = ap_code( &parser, argind ); + const char * const arg = ap_argument( &parser, argind ); + if( !code ) break; // no more options + switch( code ) + { + case '1': case '2': case '3': + case '4': case '5': case '6': + case '7': case '8': case '9': + encoder_options = option_mapping[code-'1']; break; + case 'b': member_size = getnum( arg, 0, 100000, LLONG_MAX / 2 ); break; + case 'c': to_stdout = true; break; + case 'd': program_mode = m_decompress; 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, min_match_len_limit, max_match_len ); break; + case 'o': default_output_filename = arg; break; + case 'q': verbosity = -1; break; + case 's': encoder_options.dictionary_size = get_dict_size( arg ); + break; + case 'S': volume_size = getnum( arg, 0, 100000, LLONG_MAX / 2 ); 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" ); + } + } + + bool filenames_given = false; + for( ; argind < ap_arguments( &parser ); ++argind ) + { + if( strcmp( ap_argument( &parser, argind ), "-" ) ) + filenames_given = true; + ++num_filenames; + filenames = resize_buffer( filenames, num_filenames * sizeof (char *) ); + filenames[num_filenames-1] = ap_argument( &parser, argind ); + } + + if( num_filenames == 0 ) + { + ++num_filenames; + filenames = resize_buffer( filenames, sizeof (char *) ); + filenames[num_filenames-1] = "-"; + } + if( !to_stdout && program_mode != m_test && + ( filenames_given || default_output_filename[0] ) ) + set_signals(); + + struct Pretty_print pp; + Pp_init( &pp, filenames, num_filenames ); + if( program_mode == m_test ) + outfd = -1; + else if( program_mode == m_compress ) + { + Dis_slots_init(); + Prob_prices_init(); + } + + output_filename = resize_buffer( output_filename, 1 ); + int retval = 0; + for( int i = 0; i < num_filenames; ++i ) + { + struct stat in_stats; + output_filename[0] = 0; + + if( !filenames[i][0] || !strcmp( filenames[i], "-" ) ) + { + input_filename = ""; + infd = STDIN_FILENO; + if( program_mode != m_test ) + { + if( to_stdout || !default_output_filename[0] ) + outfd = STDOUT_FILENO; + else + { + if( program_mode == m_compress ) + set_c_outname( default_output_filename, volume_size != LLONG_MAX ); + else + { + output_filename = resize_buffer( output_filename, + strlen( default_output_filename ) + 1 ); + strcpy( output_filename, default_output_filename ); + } + if( !open_outstream( force ) ) + { + if( outfd == -1 && retval < 1 ) retval = 1; + close( infd ); infd = -1; + continue; + } + } + } + } + else + { + input_filename = filenames[i]; + const int eindex = extension_index( input_filename ); + infd = open_instream( input_filename, &in_stats, program_mode, + eindex, force, to_stdout ); + if( infd < 0 ) { if( retval < 1 ) retval = 1; continue; } + if( program_mode != m_test ) + { + if( to_stdout ) outfd = STDOUT_FILENO; + else + { + if( program_mode == m_compress ) + set_c_outname( input_filename, volume_size != LLONG_MAX ); + else set_d_outname( input_filename, eindex ); + if( !open_outstream( force ) ) + { + if( outfd == -1 && retval < 1 ) retval = 1; + close( infd ); infd = -1; + continue; + } + } + } + } + + if( !check_tty( infd, program_mode ) ) return 1; + + if( output_filename[0] && !to_stdout && program_mode != m_test ) + delete_output_on_interrupt = true; + const struct stat * const in_statsp = input_filename[0] ? &in_stats : 0; + Pp_set_name( &pp, input_filename ); + int tmp = 0; + if( program_mode == m_compress ) + tmp = compress( member_size, volume_size, &encoder_options, infd, + &pp, in_statsp ); + else + tmp = decompress( infd, &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 ); + if( input_filename[0] ) + { + close( infd ); infd = -1; + if( !keep_input_files && !to_stdout && program_mode != m_test ) + remove( input_filename ); + } + } + if( outfd >= 0 && close( outfd ) != 0 ) + { + if( verbosity >= 0 ) + fprintf( stderr, "%s: Can't close stdout: %s.\n", + program_name, strerror( errno ) ); + if( retval < 1 ) retval = 1; + } + free( output_filename ); + free( filenames ); + ap_free( &parser ); + return retval; + } |