Adding upstream version 1.8.
Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
parent
ef95d5d685
commit
3c1ff97ddc
GPG key ID:
FBB4F0E80A80222F
14 changed files with 315 additions and 167 deletions
191
main.c
191
main.c
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@ -1,5 +1,5 @@
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/* Lunzip - Decompressor for the lzip format
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Copyright (C) 2010-2015 Antonio Diaz Diaz.
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Copyright (C) 2010-2016 Antonio Diaz Diaz.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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@ -23,6 +23,7 @@
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#define _FILE_OFFSET_BITS 64
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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@ -62,10 +63,11 @@
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#error "Environments where CHAR_BIT != 8 are not supported."
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#endif
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int verbosity = 0;
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const char * const Program_name = "Lunzip";
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const char * const program_name = "lunzip";
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const char * const program_year = "2015";
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const char * const program_year = "2016";
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const char * invocation_name = 0;
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struct { const char * from; const char * to; } const known_extensions[] = {
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@ -75,10 +77,6 @@ struct { const char * from; const char * to; } const known_extensions[] = {
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char * output_filename = 0;
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int outfd = -1;
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int verbosity = 0;
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const mode_t usr_rw = S_IRUSR | S_IWUSR;
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const mode_t all_rw = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
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mode_t outfd_mode = S_IRUSR | S_IWUSR;
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bool delete_output_on_interrupt = false;
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@ -86,31 +84,34 @@ static void show_help( void )
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{
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printf( "Lunzip is a decompressor for the lzip format. It is written in C and its\n"
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"small size makes it well suited for embedded devices or software\n"
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"installers that need to decompress files but do not need compression\n"
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"installers that need to decompress files but don't need compression\n"
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"capabilities. Lunzip is fully compatible with lzip-1.4 or newer.\n"
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"\nLunzip provides a 'low memory' mode able to decompress any file using as\n"
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"little memory as 50 kB, irrespective of the dictionary size used to\n"
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"compress the file. To activate it, specify the size of the output buffer\n"
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"with the '--buffer-size' option and lunzip will use the decompressed\n"
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"file as dictionary for distances beyond the buffer size. Of course, the\n"
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"smaller the output buffer size used in relation to the dictionary size,\n"
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"the more accesses to disk are needed and the slower the decompression is.\n"
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"This 'low memory' mode only works when decompressing to a regular file.\n"
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"smaller the buffer size used in relation to the dictionary size, the\n"
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"more accesses to disk are needed and the slower the decompression is.\n"
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"This 'low memory' mode only works when decompressing to a regular file\n"
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"and is intended for systems without enough memory (RAM + swap) to keep\n"
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"the whole dictionary at once.\n"
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"\nUsage: %s [options] [files]\n", invocation_name );
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printf( "\nOptions:\n"
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" -h, --help display this help and exit\n"
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" -V, --version output version information and exit\n"
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" -c, --stdout send output to standard output\n"
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" -a, --trailing-error exit with error status if trailing data\n"
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" -c, --stdout write to standard output, keep input files\n"
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" -d, --decompress decompress (this is the default)\n"
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" -f, --force overwrite existing output files\n"
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" -k, --keep keep (don't delete) input files\n"
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" -o, --output=<file> if reading stdin, place the output into <file>\n"
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" -o, --output=<file> if reading standard input, write to <file>\n"
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" -q, --quiet suppress all messages\n"
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" -t, --test test compressed file integrity\n"
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" -u, --buffer-size=<bytes> set output buffer size in bytes\n"
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" -v, --verbose be verbose (a 2nd -v gives more)\n"
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"If no file names are given, lunzip decompresses from standard input to\n"
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"standard output.\n"
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"If no file names are given, or if a file is '-', lunzip decompresses\n"
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"from standard input to standard output.\n"
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"Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,\n"
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"Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...\n"
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"\nExit status: 0 for a normal exit, 1 for environmental problems (file\n"
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@ -169,11 +170,10 @@ static unsigned long getnum( const char * const ptr,
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if( !errno && tail[0] )
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{
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const int factor = ( tail[1] == 'i' ) ? 1024 : 1000;
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int exponent = 0, i;
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bool bad_multiplier = false;
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int exponent = 0; /* 0 = bad multiplier */
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int i;
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switch( tail[0] )
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{
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case ' ': break;
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case 'Y': exponent = 8; break;
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case 'Z': exponent = 7; break;
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case 'E': exponent = 6; break;
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@ -181,13 +181,10 @@ static unsigned long getnum( const char * const ptr,
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case 'T': exponent = 4; break;
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case 'G': exponent = 3; break;
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case 'M': exponent = 2; break;
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case 'K': if( factor == 1024 ) exponent = 1; else bad_multiplier = true;
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break;
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case 'k': if( factor == 1000 ) exponent = 1; else bad_multiplier = true;
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break;
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default : bad_multiplier = true;
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case 'K': if( factor == 1024 ) exponent = 1; break;
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case 'k': if( factor == 1000 ) exponent = 1; break;
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}
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if( bad_multiplier )
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if( exponent <= 0 )
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{
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show_error( "Bad multiplier in numerical argument.", 0, true );
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exit( 1 );
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@ -306,13 +303,17 @@ static void set_d_outname( const char * const name, const int i )
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}
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static bool open_outstream( const bool force )
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static bool open_outstream( const bool force, const bool from_stdin )
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{
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const mode_t usr_rw = S_IRUSR | S_IWUSR;
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const mode_t all_rw = usr_rw | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
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const mode_t outfd_mode = from_stdin ? all_rw : usr_rw;
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int flags = O_APPEND | O_CREAT | O_RDWR | O_BINARY;
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if( force ) flags |= O_TRUNC; else flags |= O_EXCL;
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outfd = open( output_filename, flags, outfd_mode );
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if( outfd < 0 && verbosity >= 0 )
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if( outfd >= 0 ) delete_output_on_interrupt = true;
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else if( verbosity >= 0 )
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{
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if( errno == EEXIST )
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fprintf( stderr, "%s: Output file '%s' already exists, skipping.\n",
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@ -356,7 +357,11 @@ static void close_and_set_permissions( const struct stat * const in_statsp )
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fchmod( outfd, mode & ~( S_ISUID | S_ISGID | S_ISVTX ) ) != 0 )
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warning = true;
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}
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if( close( outfd ) != 0 ) cleanup_and_fail( 1 );
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if( close( outfd ) != 0 )
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{
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show_error( "Error closing output file", errno, false );
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cleanup_and_fail( 1 );
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}
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outfd = -1;
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delete_output_on_interrupt = false;
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if( in_statsp )
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@ -371,8 +376,52 @@ static void close_and_set_permissions( const struct stat * const in_statsp )
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}
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static unsigned char xdigit( const int value )
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{
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if( value >= 0 && value <= 9 ) return '0' + value;
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if( value >= 10 && value <= 15 ) return 'A' + value - 10;
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return 0;
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}
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static bool show_trailing_data( const uint8_t * const data, const int size,
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struct Pretty_print * const pp, const bool all,
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const bool ignore_trailing )
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{
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if( verbosity >= 4 || !ignore_trailing )
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{
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int i;
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char buf[80];
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int len = snprintf( buf, sizeof buf, "%strailing data = ",
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all ? "" : "first bytes of " );
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bool text = true;
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for( i = 0; i < size; ++i )
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if( !isprint( data[i] ) ) { text = false; break; }
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if( text )
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{
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if( len > 0 && len < (int)sizeof buf )
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snprintf( buf + len, sizeof buf - len, "'%.*s'", size, (const char *)data );
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}
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else
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{
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for( i = 0; i < size && len > 0 && len + 3 < (int)sizeof buf; ++i )
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{
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if( i > 0 ) buf[len++] = ' ';
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buf[len++] = xdigit( data[i] >> 4 );
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buf[len++] = xdigit( data[i] & 0x0F );
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buf[len] = 0;
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}
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}
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Pp_show_msg( pp, buf );
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if( !ignore_trailing ) show_error( "Trailing data not allowed.", 0, false );
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}
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return ignore_trailing;
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}
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static int decompress( const int infd, struct Pretty_print * const pp,
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const int buffer_size, const bool testing )
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const int buffer_size,
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const bool ignore_trailing, const bool testing )
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{
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unsigned long long partial_file_pos = 0;
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struct Range_decoder rdec;
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@ -386,24 +435,30 @@ static int decompress( const int infd, struct Pretty_print * const pp,
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for( first_member = true; ; first_member = false )
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{
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int result;
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int result, size;
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unsigned dictionary_size;
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File_header header;
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struct LZ_decoder decoder;
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Rd_reset_member_position( &rdec );
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Rd_read_data( &rdec, header, Fh_size );
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size = Rd_read_data( &rdec, header, Fh_size );
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if( Rd_finished( &rdec ) ) /* End Of File */
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{
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if( first_member )
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if( first_member || Fh_verify_prefix( header, size ) )
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{ Pp_show_msg( pp, "File ends unexpectedly at member header." );
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retval = 2; }
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else if( size > 0 && !show_trailing_data( header, size, pp,
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true, ignore_trailing ) )
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retval = 2;
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break;
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}
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if( !Fh_verify_magic( header ) )
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{
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if( !first_member ) break; /* trailing garbage */
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Pp_show_msg( pp, "Bad magic number (file not in lzip format)." );
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retval = 2; break;
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if( first_member )
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{ Pp_show_msg( pp, "Bad magic number (file not in lzip format)." );
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retval = 2; }
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else if( !show_trailing_data( header, size, pp, false, ignore_trailing ) )
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retval = 2;
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break;
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}
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if( !Fh_verify_version( header ) )
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{
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@ -424,8 +479,8 @@ static int decompress( const int infd, struct Pretty_print * const pp,
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if( !LZd_init( &decoder, &rdec, buffer_size, dictionary_size, outfd ) )
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{
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show_error( "Not enough memory. Try a smaller output buffer size.", 0, false );
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cleanup_and_fail( 1 );
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Pp_show_msg( pp, "Not enough memory. Try a smaller output buffer size." );
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retval = 1; break;
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}
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result = LZd_decode_member( &decoder, pp );
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partial_file_pos += Rd_member_position( &rdec );
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@ -468,18 +523,16 @@ static void set_signals( void )
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void show_error( const char * const msg, const int errcode, const bool help )
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{
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if( verbosity >= 0 )
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if( verbosity < 0 ) return;
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if( msg && msg[0] )
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{
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if( msg && msg[0] )
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{
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fprintf( stderr, "%s: %s", program_name, msg );
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if( errcode > 0 ) fprintf( stderr, ": %s", strerror( errcode ) );
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fputc( '\n', stderr );
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}
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if( help )
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fprintf( stderr, "Try '%s --help' for more information.\n",
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invocation_name );
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fprintf( stderr, "%s: %s", program_name, msg );
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if( errcode > 0 ) fprintf( stderr, ": %s", strerror( errcode ) );
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fputc( '\n', stderr );
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}
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if( help )
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fprintf( stderr, "Try '%s --help' for more information.\n",
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invocation_name );
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}
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@ -504,13 +557,16 @@ int main( const int argc, const char * const argv[] )
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int i;
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bool filenames_given = false;
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bool force = false;
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bool ignore_trailing = true;
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bool keep_input_files = false;
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bool stdin_used = false;
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bool testing = false;
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bool to_stdout = false;
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struct Pretty_print pp;
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const struct ap_Option options[] =
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{
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{ 'a', "trailing-error", ap_no },
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{ 'c', "stdout", ap_no },
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{ 'd', "decompress", ap_no },
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{ 'f', "force", ap_no },
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@ -542,6 +598,7 @@ int main( const int argc, const char * const argv[] )
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if( !code ) break; /* no more options */
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switch( code )
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{
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case 'a': ignore_trailing = false; break;
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case 'c': to_stdout = true; break;
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case 'd': testing = false; break;
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case 'f': force = true; break;
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@ -578,7 +635,6 @@ int main( const int argc, const char * const argv[] )
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if( buffer_size < max_dictionary_size )
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{
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struct stat st;
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bool from_stdin = false;
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if( to_stdout || testing )
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{ show_error( "'--buffer-size' is incompatible with '--stdout' and '--test'.", 0, false );
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@ -587,24 +643,15 @@ int main( const int argc, const char * const argv[] )
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if( !filenames[i][0] || strcmp( filenames[i], "-" ) == 0 )
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{ from_stdin = true; break; }
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if( from_stdin && !default_output_filename[0] )
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{ show_error( "Output file must be specified when decompressing from stdin with a\n"
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" reduced buffer size.", 0, false ); return 1; }
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if( from_stdin && default_output_filename[0] &&
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stat( default_output_filename, &st ) == 0 && !S_ISREG( st.st_mode ) )
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{
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if( verbosity >= 0 )
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fprintf( stderr, "%s: Output file '%s' is not a regular file,\n"
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" and 'low memory' mode has been requested.\n",
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program_name, default_output_filename );
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return 1;
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}
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{ show_error( "Output file must be specified when decompressing from standard input\n"
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" with a reduced buffer size.", 0, false ); return 1; }
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}
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if( !to_stdout && !testing &&
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( filenames_given || default_output_filename[0] ) )
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set_signals();
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Pp_init( &pp, filenames, num_filenames );
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Pp_init( &pp, filenames, num_filenames, verbosity );
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output_filename = resize_buffer( output_filename, 1 );
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for( i = 0; i < num_filenames; ++i )
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@ -616,6 +663,7 @@ int main( const int argc, const char * const argv[] )
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if( !filenames[i][0] || strcmp( filenames[i], "-" ) == 0 )
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{
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if( stdin_used ) continue; else stdin_used = true;
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input_filename = "";
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infd = STDIN_FILENO;
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if( !testing )
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@ -627,8 +675,7 @@ int main( const int argc, const char * const argv[] )
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output_filename = resize_buffer( output_filename,
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strlen( default_output_filename ) + 1 );
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strcpy( output_filename, default_output_filename );
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outfd_mode = all_rw;
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if( !open_outstream( force ) )
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if( !open_outstream( force, true ) )
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{
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if( retval < 1 ) retval = 1;
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close( infd ); infd = -1;
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@ -648,8 +695,7 @@ int main( const int argc, const char * const argv[] )
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else
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{
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set_d_outname( input_filename, extension_index( input_filename ) );
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outfd_mode = usr_rw;
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if( !open_outstream( force ) )
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if( !open_outstream( force, false ) )
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{
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if( retval < 1 ) retval = 1;
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close( infd ); infd = -1;
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@ -662,14 +708,27 @@ int main( const int argc, const char * const argv[] )
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if( isatty( infd ) )
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{
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show_error( "I won't read compressed data from a terminal.", 0, true );
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return 1;
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if( retval < 1 ) retval = 1;
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cleanup_and_fail( retval );
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}
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if( delete_output_on_interrupt && buffer_size < max_dictionary_size )
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{
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struct stat st;
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if( fstat( outfd, &st ) != 0 || !S_ISREG( st.st_mode ) )
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{
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if( verbosity >= 0 )
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fprintf( stderr, "%s: Output file '%s' is not a regular file,\n"
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" and 'low memory' mode has been requested.\n",
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program_name, output_filename );
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if( retval < 1 ) retval = 1;
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cleanup_and_fail( retval );
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}
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}
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if( output_filename[0] && !to_stdout && !testing )
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delete_output_on_interrupt = true;
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in_statsp = input_filename[0] ? &in_stats : 0;
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Pp_set_name( &pp, input_filename );
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tmp = decompress( infd, &pp, buffer_size, testing );
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tmp = decompress( infd, &pp, buffer_size, ignore_trailing, testing );
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if( tmp > retval ) retval = tmp;
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if( tmp && !testing ) cleanup_and_fail( retval );
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