/* Minilzip - A test program for the lzlib library
Copyright (C) 2009, 2010, 2011, 2012 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 minilzip to panic.
*/
#define _FILE_OFFSET_BITS 64
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <utime.h>
#include <sys/stat.h>
#include "carg_parser.h"
#include "lzlib.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
#ifndef min
#define min(x,y) ((x) <= (y) ? (x) : (y))
#endif
long long int llabs( long long int number );
const char * const Program_name = "Minilzip";
const char * const program_name = "minilzip";
const char * const program_year = "2012";
const char * invocation_name = 0;
#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, m_decompress, m_test };
char * output_filename = 0;
int outfd = -1;
int verbosity = 0;
const mode_t usr_rw = S_IRUSR | S_IWUSR;
const mode_t all_rw = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
mode_t outfd_mode = S_IRUSR | S_IWUSR;
bool delete_output_on_interrupt = false;
struct Pretty_print
{
const char * name;
const char * stdin_name;
int longest_name;
bool first_post;
};
static void Pp_init( struct Pretty_print * const pp,
const char * const filenames[], const int num_filenames )
{
unsigned int stdin_name_len;
int i;
pp->name = 0;
pp->stdin_name = "(stdin)";
pp->longest_name = 0;
pp->first_post = false;
stdin_name_len = strlen( pp->stdin_name );
for( 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;
}
static inline void Pp_set_name( struct Pretty_print * const pp,
const char * const filename )
{
if( filename && filename[0] && strcmp( filename, "-" ) )
pp->name = filename;
else pp->name = pp->stdin_name;
pp->first_post = true;
}
static inline void Pp_reset( struct Pretty_print * const pp )
{ if( pp->name && pp->name[0] ) pp->first_post = true; }
static void Pp_show_msg( struct Pretty_print * const pp, const char * const msg )
{
if( verbosity >= 0 )
{
if( pp->first_post )
{
int i, len;
pp->first_post = false;
fprintf( stderr, " %s: ", pp->name );
len = pp->longest_name - strlen( pp->name );
for( i = 0; i < len; ++i ) fprintf( stderr, " " );
if( !msg ) fflush( stderr );
}
if( msg ) fprintf( stderr, "%s.\n", msg );
}
}
static void show_help( void )
{
printf( "%s - A test program for the lzlib library.\n", Program_name );
printf( "\nUsage: %s [options] [files]\n", invocation_name );
printf( "\nOptions:\n"
" -h, --help display this help and exit\n"
" -V, --version output version information and exit\n"
" -b, --member-size=<bytes> set member size limit in bytes\n"
" -c, --stdout send output to standard output\n"
" -d, --decompress decompress\n"
" -f, --force overwrite existing output files\n"
" -F, --recompress force recompression 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"
" -o, --output=<file> if reading stdin, place the output into <file>\n"
" -q, --quiet suppress all messages\n"
" -s, --dictionary-size=<bytes> set dictionary size limit in bytes [8MiB]\n"
" -S, --volume-size=<bytes> set volume size limit in bytes\n"
" -t, --test test compressed file integrity\n"
" -v, --verbose be verbose (a 2nd -v gives more)\n"
" -1 .. -9 set compression level [default 6]\n"
" --fast alias for -1\n"
" --best alias for -9\n"
"If no file names are given, minilzip compresses or decompresses\n"
"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"
"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"
"options directly to achieve optimal performance.\n"
"\nReport bugs to lzip-bug@nongnu.org\n"
"Lzlib home page: http://www.nongnu.org/lzip/lzlib.html\n" );
}
static void show_version( void )
{
printf( "%s %s\n", Program_name, PROGVERSION );
printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year );
printf( "Using Lzlib %s\n", LZ_version() );
printf( "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n"
"This is free software: you are free to change and redistribute it.\n"
"There is NO WARRANTY, to the extent permitted by law.\n" );
}
void show_error( const char * const msg, const int errcode, const bool help )
{
if( verbosity >= 0 )
{
if( msg && msg[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] )
fprintf( stderr, "Try '%s --help' for more information.\n",
invocation_name );
}
}
void internal_error( const char * const msg )
{
if( verbosity >= 0 )
fprintf( stderr, "%s: internal error: %s.\n", program_name, msg );
exit( 3 );
}
static const char * format_num( long long num )
{
const char * const prefix[8] =
{ "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi" };
enum { buf_size = 16, factor = 1024 };
static char buf[buf_size];
const char *p = "";
bool exact = ( num % factor == 0 );
int i;
for( i = 0; i < 8 && ( llabs( num ) > 9999 ||
( exact && llabs( num ) >= factor ) ); ++i )
{ num /= factor; if( num % factor != 0 ) exact = false; p = prefix[i]; }
snprintf( buf, buf_size, "%lld %s", num, p );
return buf;
}
static long long getnum( const char * const ptr,
const long long llimit, const long long ulimit )
{
long long result;
char *tail;
errno = 0;
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;
int i;
bool bad_multiplier = false;
switch( tail[0] )
{
case ' ': 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( 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 >= LZ_min_dictionary_bits() &&
bits <= LZ_max_dictionary_bits() && *tail == 0 )
return ( 1 << bits );
return getnum( arg, LZ_min_dictionary_size(), LZ_max_dictionary_size() );
}
static int open_instream( const char * const name, struct stat * const in_statsp,
const enum Mode program_mode, const int eindex,
const bool recompress, const bool to_stdout )
{
int infd = -1;
if( program_mode == m_compress && !recompress && 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;
const bool can_read = ( i == 0 &&
( S_ISBLK( mode ) || S_ISCHR( mode ) ||
S_ISFIFO( mode ) || S_ISSOCK( mode ) ) );
if( i != 0 || ( !S_ISREG( mode ) && ( !to_stdout || !can_read ) ) )
{
if( verbosity >= 0 )
fprintf( stderr, "%s: Input file '%s' is not a regular file%s.\n",
program_name, name,
( can_read && !to_stdout ) ?
" and '--stdout' was not specified" : "" );
close( infd );
infd = -1;
}
}
}
return infd;
}
void cleanup_and_fail( const int retval )
{
if( delete_output_on_interrupt )
{
delete_output_on_interrupt = false;
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 && errno != ENOENT )
show_error( "WARNING: deletion of output file (apparently) failed.", 0, false );
}
exit( retval );
}
/* assure at least a minimum size for buffer 'buf' */
static void * resize_buffer( void * buf, const int min_size )
{
if( buf ) buf = realloc( buf, min_size );
else buf = malloc( min_size );
if( !buf )
{
show_error( "Not enough memory.", 0, false );
cleanup_and_fail( 1 );
}
return buf;
}
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 int extension_index( const char * const name )
{
int i;
for( 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 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 >= 1 )
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, outfd_mode );
if( outfd < 0 && verbosity >= 0 )
{
if( errno == EEXIST )
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 && outfd >= 0 && 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 warning = false;
if( in_statsp )
{
/* fchown will in many cases return with EPERM, which can be safely ignored. */
if( ( fchown( outfd, in_statsp->st_uid, in_statsp->st_gid ) != 0 &&
errno != EPERM ) ||
fchmod( outfd, in_statsp->st_mode ) != 0 ) warning = true;
}
if( close( outfd ) != 0 ) cleanup_and_fail( 1 );
outfd = -1;
delete_output_on_interrupt = false;
if( in_statsp )
{
struct utimbuf t;
t.actime = in_statsp->st_atime;
t.modtime = in_statsp->st_mtime;
if( utime( output_filename, &t ) != 0 ) warning = true;
}
if( warning && verbosity >= 1 )
show_error( "Can't change output file attributes.", 0, false );
}
/* 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( n < 0 && errno != EINTR && errno != EAGAIN ) break;
}
return ( rest > 0 ) ? size - rest : size;
}
static bool next_filename( void )
{
const unsigned int len = strlen( known_extensions[0].from );
int i, j;
if( strlen( output_filename ) >= len + 5 ) /* "*00001.lz" */
for( 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 do_compress( struct LZ_Encoder * const encoder, const long long member_size,
const long long volume_size, const int infd,
struct Pretty_print * const pp,
const struct stat * const in_statsp )
{
long long partial_volume_size = 0;
enum { buffer_size = 65536 };
uint8_t buffer[buffer_size];
if( verbosity >= 1 ) Pp_show_msg( pp, 0 );
while( true )
{
int in_size = 0;
while( LZ_compress_write_size( encoder ) > 0 )
{
const int size = min( LZ_compress_write_size( encoder ), buffer_size );
const int rd = readblock( infd, buffer, size );
if( rd != size && errno )
{
Pp_show_msg( pp, 0 ); show_error( "Read error", errno, false );
return 1;
}
if( rd > 0 && rd != LZ_compress_write( encoder, buffer, rd ) )
internal_error( "library error (LZ_compress_write)" );
if( rd < size ) LZ_compress_finish( encoder );
/* else LZ_compress_sync_flush( encoder ); */
in_size += rd;
}
const int out_size = LZ_compress_read( encoder, buffer, buffer_size );
if( out_size < 0 )
{
Pp_show_msg( pp, 0 );
if( verbosity >= 0 )
fprintf( stderr, "%s: LZ_compress_read error: %s.\n",
program_name, LZ_strerror( LZ_compress_errno( encoder ) ) );
return 1;
}
else if( out_size > 0 )
{
const int wr = writeblock( outfd, buffer, out_size );
if( wr != out_size )
{
Pp_show_msg( pp, 0 ); show_error( "Write error", errno, false );
return 1;
}
}
else if( in_size == 0 ) internal_error( "library error (LZ_compress_read)" );
if( LZ_compress_member_finished( encoder ) )
{
if( LZ_compress_finished( encoder ) == 1 ) break;
partial_volume_size += LZ_compress_member_position( encoder );
if( partial_volume_size >= volume_size - LZ_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" ); return 1; }
if( !open_outstream( true ) ) return 1;
delete_output_on_interrupt = true;
}
}
const long long size =
min( member_size, volume_size - partial_volume_size );
if( LZ_compress_restart_member( encoder, size ) < 0 )
{
Pp_show_msg( pp, 0 );
if( verbosity >= 0 )
fprintf( stderr, "%s: LZ_compress_restart_member error: %s.\n",
program_name, LZ_strerror( LZ_compress_errno( encoder ) ) );
return 1;
}
}
}
if( verbosity >= 1 )
{
const long long in_size = LZ_compress_total_in_size( encoder );
const long long out_size = LZ_compress_total_out_size( encoder );
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 );
}
return 0;
}
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 )
{
struct LZ_Encoder * const encoder =
LZ_compress_open( encoder_options->dictionary_size,
encoder_options->match_len_limit,
min( member_size, volume_size ) );
int retval;
if( !encoder || LZ_compress_errno( encoder ) != LZ_ok )
{
if( !encoder || LZ_compress_errno( encoder ) == LZ_mem_error )
Pp_show_msg( pp, "Not enough memory. Try a smaller dictionary size" );
else
internal_error( "invalid argument to encoder" );
retval = 1;
}
else retval = do_compress( encoder, member_size, volume_size,
infd, pp, in_statsp );
LZ_compress_close( encoder );
return retval;
}
int do_decompress( struct LZ_Decoder * const decoder, const int infd,
struct Pretty_print * const pp, const bool testing )
{
enum { buffer_size = 65536 };
uint8_t buffer[buffer_size];
bool first_member;
for( first_member = true; ; )
{
int in_size = min( LZ_decompress_write_size( decoder ), buffer_size );
if( in_size > 0 )
{
const int max_in_size = in_size;
in_size = readblock( infd, buffer, max_in_size );
if( in_size != max_in_size && errno )
{
Pp_show_msg( pp, 0 ); show_error( "Read error", errno, false );
return 1;
}
if( in_size > 0 && in_size != LZ_decompress_write( decoder, buffer, in_size ) )
internal_error( "library error (LZ_decompress_write)" );
if( in_size < max_in_size ) LZ_decompress_finish( decoder );
}
int out_size = 0;
while( true )
{
const int rd = LZ_decompress_read( decoder, buffer, buffer_size );
if( rd > 0 )
{
out_size += rd;
if( outfd >= 0 )
{
const int wr = writeblock( outfd, buffer, rd );
if( wr != rd )
{
Pp_show_msg( pp, 0 ); show_error( "Write error", errno, false );
return 1;
}
}
}
else if( rd < 0 ) { out_size = rd; break; }
if( verbosity >= 1 && LZ_decompress_member_finished( decoder ) == 1 )
{
const long long data_position = LZ_decompress_data_position( decoder );
const long long member_size = LZ_decompress_member_position( decoder );
Pp_show_msg( pp, 0 );
if( verbosity >= 2 )
fprintf( stderr, "version %d, dictionary size %7sB. ",
LZ_decompress_member_version( decoder ),
format_num( LZ_decompress_dictionary_size( decoder ) ) );
if( verbosity >= 3 && data_position > 0 && member_size > 0 )
fprintf( stderr, "%6.3f:1, %6.3f bits/byte, %5.2f%% saved. ",
(double)data_position / member_size,
( 8.0 * member_size ) / data_position,
100.0 * ( 1.0 - ( (double)member_size / data_position ) ) );
if( verbosity >= 4 )
fprintf( stderr, "data CRC %08X, data size %9lld, member size %8lld. ",
LZ_decompress_data_crc( decoder ),
data_position, member_size );
if( testing ) fprintf( stderr, "ok\n" );
else fprintf( stderr, "done\n" );
}
if( LZ_decompress_member_finished( decoder ) == 1 )
{ first_member = false; Pp_reset( pp ); }
if( rd <= 0 ) break;
}
if( out_size < 0 )
{
const enum LZ_Errno lz_errno = LZ_decompress_errno( decoder );
if( lz_errno == LZ_header_error )
{
if( !first_member ) break; /* trailing garbage */
Pp_show_msg( pp, "Error reading member header" );
return 1;
}
if( lz_errno == LZ_mem_error )
{
Pp_show_msg( pp, "Not enough memory. Find a machine with more memory" );
return 1;
}
Pp_show_msg( pp, 0 );
if( lz_errno == LZ_unexpected_eof )
{
if( verbosity >= 0 )
fprintf( stderr, "File ends unexpectedly at pos %lld\n",
LZ_decompress_total_in_size( decoder ) );
return 2;
}
if( verbosity >= 0 )
fprintf( stderr, "LZ_decompress_read error: %s.\n",
LZ_strerror( LZ_decompress_errno( decoder ) ) );
return 1;
}
if( LZ_decompress_finished( decoder ) == 1 ) break;
if( in_size == 0 && out_size == 0 )
internal_error( "library error (LZ_decompress_read)" );
}
return 0;
}
int decompress( const int infd, struct Pretty_print * const pp,
const bool testing )
{
struct LZ_Decoder * const decoder = LZ_decompress_open();
int retval;
if( !decoder || LZ_decompress_errno( decoder ) != LZ_ok )
{
Pp_show_msg( pp, "Not enough memory. Find a machine with more memory" );
retval = 1;
}
else retval = do_decompress( decoder, infd, pp, testing );
LZ_decompress_close( decoder );
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( void )
{
signal( SIGHUP, signal_handler );
signal( SIGINT, signal_handler );
signal( SIGTERM, signal_handler );
}
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, 5 }, /* -0 */
{ 1 << 20, 5 }, /* -1 */
{ 3 << 19, 6 }, /* -2 */
{ 1 << 21, 8 }, /* -3 */
{ 3 << 20, 12 }, /* -4 */
{ 1 << 22, 20 }, /* -5 */
{ 1 << 23, 36 }, /* -6 */
{ 1 << 24, 68 }, /* -7 */
{ 3 << 23, 132 }, /* -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;
const char * input_filename = "";
const char * default_output_filename = "";
const char ** filenames = 0;
int num_filenames = 0;
int infd = -1;
enum Mode program_mode = m_compress;
int argind = 0;
int retval = 0;
int i;
bool filenames_given = false;
bool force = false;
bool keep_input_files = false;
bool recompress = false;
bool to_stdout = false;
struct Pretty_print pp;
const struct ap_Option options[] =
{
{ '0', "fast", ap_no },
{ '1', 0, 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 },
{ 'F', "recompress", 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;
invocation_name = argv[0];
if( LZ_version()[0] != LZ_version_string[0] )
internal_error( "bad library version" );
if( strcmp( PROGVERSION, LZ_version_string ) )
internal_error( "bad library version_string" );
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; }
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, 100000, LLONG_MAX / 2 ); break;
case 'c': to_stdout = true; break;
case 'd': program_mode = m_decompress; break;
case 'f': force = true; break;
case 'F': recompress = true; break;
case 'h': show_help(); return 0;
case 'k': keep_input_files = true; break;
case 'm': encoder_options.match_len_limit =
getnum( arg, LZ_min_match_len_limit(),
LZ_max_match_len_limit() ); 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, 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" );
}
} /* end process options */
#if defined(__OS2__)
_fsetmode( stdin, "b" );
_fsetmode( stdout, "b" );
#endif
if( program_mode == m_test )
outfd = -1;
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();
Pp_init( &pp, filenames, num_filenames );
output_filename = resize_buffer( output_filename, 1 );
for( i = 0; i < num_filenames; ++i )
{
int tmp;
struct stat in_stats;
const struct stat * in_statsp;
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 );
}
outfd_mode = all_rw;
if( !open_outstream( force ) )
{
if( outfd == -1 && retval < 1 ) retval = 1;
close( infd ); infd = -1;
continue;
}
}
}
}
else
{
const int eindex = extension_index( filenames[i] );
input_filename = filenames[i];
infd = open_instream( input_filename, &in_stats, program_mode,
eindex, recompress, 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 );
outfd_mode = usr_rw;
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;
in_statsp = input_filename[0] ? &in_stats : 0;
Pp_set_name( &pp, input_filename );
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 )
{
show_error( "Can't close stdout", errno, false );
if( retval < 1 ) retval = 1;
}
free( output_filename );
free( filenames );
ap_free( &parser );
return retval;
}