/* 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, "encoder error" ); 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, "too many volume files" ); 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", errno, 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 Range_decoder rdec;
Rd_init( &rdec, infd );
long long partial_file_pos = 0;
int retval = 0;
for( bool first_member = true; ; first_member = false, Pp_reset( pp ) )
{
File_header header;
Rd_reset_member_position( &rdec );
for( int i = 0; i < Fh_size; ++i )
header[i] = Rd_get_byte( &rdec );
if( Rd_finished( &rdec ) ) // End Of File
{
if( first_member )
{ 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, &rdec, outfd );
const int result = LZd_decode_member( &decoder, pp );
partial_file_pos += Rd_member_position( &rdec );
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" ); }
}
Rd_free( &rdec );
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 << 16, 5 }, // -0
{ 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[6]; // 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[] =
{
{ '0', 0, ap_no },
{ '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 },
{ 'e', "extreme", 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, false ); return 1; }
if( ap_error( &parser ) ) // bad option
{ show_error( ap_error( &parser ), 0, true ); 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 '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 '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 'e': break; // ignored by now
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;
}