diff options
Diffstat (limited to 'main.cc')
| -rw-r--r-- | main.cc | 144 |
1 files changed, 74 insertions, 70 deletions
@@ -1,6 +1,6 @@ /* Plzip - Parallel compressor compatible with lzip Copyright (C) 2009 Laszlo Ersek. - Copyright (C) 2009-2015 Antonio Diaz Diaz. + Copyright (C) 2009-2016 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 @@ -67,12 +67,13 @@ #error "Environments where CHAR_BIT != 8 are not supported." #endif +int verbosity = 0; namespace { const char * const Program_name = "Plzip"; const char * const program_name = "plzip"; -const char * const program_year = "2015"; +const char * const program_year = "2016"; const char * invocation_name = 0; struct { const char * from; const char * to; } const known_extensions[] = { @@ -90,9 +91,6 @@ enum Mode { m_compress, m_decompress, m_test }; std::string output_filename; int outfd = -1; -const mode_t usr_rw = S_IRUSR | S_IWUSR; -const mode_t all_rw = usr_rw | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH; -mode_t outfd_mode = usr_rw; bool delete_output_on_interrupt = false; @@ -103,15 +101,16 @@ void show_help( const long num_online ) std::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" " -B, --data-size=<bytes> set size of input data blocks [2x8=16 MiB]\n" - " -c, --stdout send output to standard output\n" + " -c, --stdout write to standard output, keep input files\n" " -d, --decompress decompress\n" " -f, --force overwrite existing output files\n" " -F, --recompress force re-compression of compressed files\n" " -k, --keep keep (don't delete) input files\n" " -m, --match-length=<bytes> set match length limit in bytes [36]\n" " -n, --threads=<n> set number of (de)compression threads [%ld]\n" - " -o, --output=<file> if reading stdin, place the output into <file>\n" + " -o, --output=<file> if reading standard input, write to <file>\n" " -q, --quiet suppress all messages\n" " -s, --dictionary-size=<bytes> set dictionary size limit in bytes [8 MiB]\n" " -t, --test test compressed file integrity\n" @@ -123,13 +122,15 @@ void show_help( const long num_online ) { std::printf( " -D, --debug=<level> (0-1) print debug statistics to stderr\n" ); } - std::printf( "If no file names are given, plzip compresses or decompresses\n" - "from standard input to standard output.\n" + std::printf( "If no file names are given, or if a file is '-', plzip compresses or\n" + "decompresses 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" - "The bidimensional parameter space of LZMA can't be mapped to a linear\n" + "Dictionary sizes 12 to 29 are interpreted as powers of two, meaning 2^12\n" + "to 2^29 bytes.\n" + "\nThe bidimensional parameter space of LZMA can't be mapped to a linear\n" "scale optimal for all files. If your files are large, very repetitive,\n" - "etc, you may need to use the --match-length and --dictionary-size\n" + "etc, you may need to use the --dictionary-size and --match-length\n" "options directly to achieve optimal performance.\n" "\nExit status: 0 for a normal exit, 1 for environmental problems (file\n" "not found, invalid flags, I/O errors, etc), 2 to indicate a corrupt or\n" @@ -190,11 +191,9 @@ unsigned long long getnum( const char * const ptr, if( !errno && tail[0] ) { const int factor = ( tail[1] == 'i' ) ? 1024 : 1000; - int exponent = 0; - bool bad_multiplier = false; + int exponent = 0; // 0 = bad multiplier switch( tail[0] ) { - case ' ': break; case 'Y': exponent = 8; break; case 'Z': exponent = 7; break; case 'E': exponent = 6; break; @@ -202,13 +201,10 @@ unsigned long long getnum( const char * const ptr, 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; + case 'K': if( factor == 1024 ) exponent = 1; break; + case 'k': if( factor == 1000 ) exponent = 1; break; } - if( bad_multiplier ) + if( exponent <= 0 ) { show_error( "Bad multiplier in numerical argument.", 0, true ); std::exit( 1 ); @@ -238,7 +234,7 @@ int get_dict_size( const char * const arg ) return ( 1 << bits ); int dictionary_size = getnum( arg, LZ_min_dictionary_size(), LZ_max_dictionary_size() ); - if( dictionary_size == 65535 ) ++dictionary_size; + if( dictionary_size == 65535 ) ++dictionary_size; // no fast encoder return dictionary_size; } @@ -283,7 +279,7 @@ 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 || program_mode == m_test; + const bool no_ofile = ( to_stdout || program_mode == m_test ); if( i != 0 || ( !S_ISREG( mode ) && ( !can_read || !no_ofile ) ) ) { if( verbosity >= 0 ) @@ -326,13 +322,17 @@ void set_d_outname( const std::string & name, const int i ) } -bool open_outstream( const bool force ) +bool open_outstream( const bool force, const bool from_stdin ) { + 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 = from_stdin ? all_rw : usr_rw; int flags = O_CREAT | O_WRONLY | O_BINARY; if( force ) flags |= O_TRUNC; else flags |= O_EXCL; outfd = open( output_filename.c_str(), flags, outfd_mode ); - if( outfd < 0 && verbosity >= 0 ) + if( outfd >= 0 ) delete_output_on_interrupt = true; + else if( verbosity >= 0 ) { if( errno == EEXIST ) std::fprintf( stderr, "%s: Output file '%s' already exists, skipping.\n", @@ -403,7 +403,11 @@ void close_and_set_permissions( const struct stat * const in_statsp ) fchmod( outfd, mode & ~( S_ISUID | S_ISGID | S_ISVTX ) ) != 0 ) warning = true; } - if( close( outfd ) != 0 ) cleanup_and_fail( 1 ); + if( close( outfd ) != 0 ) + { + show_error( "Error closing output file", errno ); + cleanup_and_fail( 1 ); + } outfd = -1; delete_output_on_interrupt = false; if( in_statsp ) @@ -435,24 +439,18 @@ void set_signals() } // end namespace -int verbosity = 0; - - void show_error( const char * const msg, const int errcode, const bool help ) { - if( verbosity >= 0 ) + if( verbosity < 0 ) return; + if( msg && msg[0] ) { - if( msg && msg[0] ) - { - std::fprintf( stderr, "%s: %s", program_name, msg ); - if( errcode > 0 ) - std::fprintf( stderr, ": %s", std::strerror( errcode ) ); - std::fputc( '\n', stderr ); - } - if( help ) - std::fprintf( stderr, "Try '%s --help' for more information.\n", - invocation_name ); + std::fprintf( stderr, "%s: %s", program_name, msg ); + if( errcode > 0 ) std::fprintf( stderr, ": %s", std::strerror( errcode ) ); + std::fputc( '\n', stderr ); } + if( help ) + std::fprintf( stderr, "Try '%s --help' for more information.\n", + invocation_name ); } @@ -473,20 +471,18 @@ void show_progress( const int packet_size, static const Pretty_print * pp = 0; static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; - if( verbosity >= 2 ) + if( verbosity < 2 ) return; + if( p ) // initialize static vars + { csize = cfile_size; pos = 0; pp = p; } + if( pp ) { - if( p ) // initialize static vars - { csize = cfile_size; pos = 0; pp = p; } - if( pp ) - { - xlock( &mutex ); - pos += packet_size; - if( csize > 0 ) - std::fprintf( stderr, "%4llu%%", pos / csize ); - std::fprintf( stderr, " %.1f MB\r", pos / 1000000.0 ); - pp->reset(); (*pp)(); // restore cursor position - xunlock( &mutex ); - } + xlock( &mutex ); + pos += packet_size; + if( csize > 0 ) + std::fprintf( stderr, "%4llu%%", pos / csize ); + std::fprintf( stderr, " %.1f MB\r", pos / 1000000.0 ); + pp->reset(); (*pp)(); // restore cursor position + xunlock( &mutex ); } } @@ -497,7 +493,7 @@ int main( const int argc, const char * const argv[] ) to the corresponding LZMA compression modes. */ const Lzma_options option_mapping[] = { - { 65535, 16 }, // -0 + { 65535, 16 }, // -0 (65535,16 chooses fast encoder) { 1 << 20, 5 }, // -1 { 3 << 19, 6 }, // -2 { 1 << 21, 8 }, // -3 @@ -517,13 +513,15 @@ int main( const int argc, const char * const argv[] ) int num_workers = 0; // start this many worker threads Mode program_mode = m_compress; bool force = false; + bool ignore_trailing = true; bool keep_input_files = false; bool recompress = false; bool to_stdout = false; invocation_name = argv[0]; - if( LZ_version()[0] != LZ_version_string[0] ) - internal_error( "bad library version." ); + if( LZ_version()[0] < '1' ) + { show_error( "Bad library version. At least lzlib 1.0 is required." ); + return 1; } const long num_online = std::max( 1L, sysconf( _SC_NPROCESSORS_ONLN ) ); long max_workers = sysconf( _SC_THREAD_THREADS_MAX ); @@ -542,6 +540,7 @@ int main( const int argc, const char * const argv[] ) { '7', 0, Arg_parser::no }, { '8', 0, Arg_parser::no }, { '9', "best", Arg_parser::no }, + { 'a', "trailing-error", Arg_parser::no }, { 'b', "member-size", Arg_parser::yes }, { 'B', "data-size", Arg_parser::yes }, { 'c', "stdout", Arg_parser::no }, @@ -572,28 +571,30 @@ int main( const int argc, const char * const argv[] ) const int code = parser.code( argind ); if( !code ) break; // no more options const std::string & arg = parser.argument( argind ); + const char * const ptr = arg.c_str(); switch( code ) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': encoder_options = option_mapping[code-'0']; break; + case 'a': ignore_trailing = false; break; case 'b': break; - case 'B': data_size = getnum( arg.c_str(), 2 * LZ_min_dictionary_size(), + case 'B': data_size = getnum( ptr, 2 * LZ_min_dictionary_size(), 2 * LZ_max_dictionary_size() ); break; case 'c': to_stdout = true; break; case 'd': program_mode = m_decompress; break; - case 'D': debug_level = getnum( arg.c_str(), 0, 3 ); break; + case 'D': debug_level = getnum( ptr, 0, 3 ); break; case 'f': force = true; break; case 'F': recompress = true; break; case 'h': show_help( num_online ); return 0; case 'k': keep_input_files = true; break; case 'm': encoder_options.match_len_limit = - getnum( arg.c_str(), LZ_min_match_len_limit(), - LZ_max_match_len_limit() ); break; - case 'n': num_workers = getnum( arg.c_str(), 1, max_workers ); break; + getnum( ptr, LZ_min_match_len_limit(), + LZ_max_match_len_limit() ); break; + case 'n': num_workers = getnum( ptr, 1, max_workers ); break; case 'o': default_output_filename = arg; break; case 'q': verbosity = -1; break; - case 's': encoder_options.dictionary_size = get_dict_size( arg.c_str() ); + case 's': encoder_options.dictionary_size = get_dict_size( ptr ); break; case 'S': break; case 't': program_mode = m_test; break; @@ -637,9 +638,10 @@ int main( const int argc, const char * const argv[] ) ( filenames_given || default_output_filename.size() ) ) set_signals(); - Pretty_print pp( filenames ); + Pretty_print pp( filenames, verbosity ); int retval = 0; + bool stdin_used = false; for( unsigned i = 0; i < filenames.size(); ++i ) { struct stat in_stats; @@ -647,6 +649,7 @@ int main( const int argc, const char * const argv[] ) if( filenames[i].empty() || filenames[i] == "-" ) { + if( stdin_used ) continue; else stdin_used = true; input_filename.clear(); infd = STDIN_FILENO; if( program_mode != m_test ) @@ -658,8 +661,7 @@ int main( const int argc, const char * const argv[] ) if( program_mode == m_compress ) set_c_outname( default_output_filename ); else output_filename = default_output_filename; - outfd_mode = all_rw; - if( !open_outstream( force ) ) + if( !open_outstream( force, true ) ) { if( retval < 1 ) retval = 1; close( infd ); infd = -1; @@ -683,8 +685,7 @@ int main( const int argc, const char * const argv[] ) if( program_mode == m_compress ) set_c_outname( input_filename ); else set_d_outname( input_filename, eindex ); - outfd_mode = usr_rw; - if( !open_outstream( force ) ) + if( !open_outstream( force, false ) ) { if( retval < 1 ) retval = 1; close( infd ); infd = -1; @@ -694,10 +695,12 @@ int main( const int argc, const char * const argv[] ) } } - if( !check_tty( infd, program_mode ) ) return 1; + if( !check_tty( infd, program_mode ) ) + { + if( retval < 1 ) retval = 1; + cleanup_and_fail( retval ); + } - if( output_filename.size() && !to_stdout && program_mode != m_test ) - delete_output_on_interrupt = true; const struct stat * const in_statsp = input_filename.size() ? &in_stats : 0; const bool infd_isreg = in_statsp && S_ISREG( in_statsp->st_mode ); pp.set_name( input_filename ); @@ -711,7 +714,8 @@ int main( const int argc, const char * const argv[] ) num_workers, infd, outfd, pp, debug_level ); } else - tmp = decompress( num_workers, infd, outfd, pp, debug_level, infd_isreg ); + tmp = decompress( num_workers, infd, outfd, pp, debug_level, + ignore_trailing, infd_isreg ); if( tmp > retval ) retval = tmp; if( tmp && program_mode != m_test ) cleanup_and_fail( retval ); |