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-rw-r--r--main.cc158
1 files changed, 75 insertions, 83 deletions
diff --git a/main.cc b/main.cc
index 97e27b6..8b2eedd 100644
--- a/main.cc
+++ b/main.cc
@@ -1,5 +1,5 @@
/* Lzip - LZMA lossless data compressor
- Copyright (C) 2008-2015 Antonio Diaz Diaz.
+ Copyright (C) 2008-2016 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
@@ -69,12 +69,13 @@
#error "Environments where CHAR_BIT != 8 are not supported."
#endif
+int verbosity = 0;
namespace {
const char * const Program_name = "Lzip";
const char * const program_name = "lzip";
-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[] = {
@@ -92,9 +93,6 @@ 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;
@@ -107,13 +105,13 @@ void show_help()
" -V, --version output version information and exit\n"
" -a, --trailing-error exit with error status if trailing data\n"
" -b, --member-size=<bytes> set member size limit in bytes\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"
- " -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"
" -S, --volume-size=<bytes> set volume size limit in bytes\n"
@@ -122,13 +120,15 @@ void show_help()
" -0 .. -9 set compression level [default 6]\n"
" --fast alias for -0\n"
" --best alias for -9\n"
- "If no file names are given, lzip compresses or decompresses\n"
- "from standard input to standard output.\n"
+ "If no file names are given, or if a file is '-', lzip 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"
@@ -149,7 +149,7 @@ void show_version()
}
-void show_header( const File_header & header )
+void show_header( const unsigned dictionary_size )
{
if( verbosity >= 3 )
{
@@ -158,14 +158,12 @@ void show_header( const File_header & header )
enum { factor = 1024 };
const char * p = "";
const char * np = " ";
- unsigned num = header.dictionary_size();
+ unsigned num = dictionary_size;
bool exact = ( num % factor == 0 );
for( int i = 0; i < 8 && ( num > 9999 || ( exact && num >= factor ) ); ++i )
{ num /= factor; if( num % factor != 0 ) exact = false;
p = prefix[i]; np = ""; }
- if( verbosity >= 4 && header.version() != 1 )
- std::fprintf( stderr, "version %d, ", header.version() );
std::fprintf( stderr, "dictionary size %s%4u %sB. ", np, num, p );
}
}
@@ -187,11 +185,9 @@ 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;
@@ -199,13 +195,10 @@ 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 );
@@ -321,13 +314,17 @@ 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",
@@ -388,7 +385,11 @@ 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 )
@@ -463,8 +464,7 @@ int compress( const unsigned long long member_size,
close_and_set_permissions( in_statsp );
if( !next_filename() )
{ pp( "Too many volume files." ); retval = 1; break; }
- if( !open_outstream( true ) ) { retval = 1; break; }
- delete_output_on_interrupt = true;
+ if( !open_outstream( true, !in_statsp ) ) { retval = 1; break; }
}
}
}
@@ -505,9 +505,9 @@ unsigned char xdigit( const int value )
bool show_trailing_data( const uint8_t * const data, const int size,
const Pretty_print & pp, const bool all,
- const bool ignore_garbage )
+ const bool ignore_trailing )
{
- if( verbosity >= 4 || !ignore_garbage )
+ if( verbosity >= 4 || !ignore_trailing )
{
std::string msg;
if( !all ) msg = "first bytes of ";
@@ -531,14 +531,14 @@ bool show_trailing_data( const uint8_t * const data, const int size,
}
}
pp( msg.c_str() );
- if( !ignore_garbage ) show_error( "Trailing data not allowed." );
+ if( !ignore_trailing ) show_error( "Trailing data not allowed." );
}
- return ignore_garbage;
+ return ignore_trailing;
}
int decompress( const int infd, const Pretty_print & pp,
- const bool ignore_garbage, const bool testing )
+ const bool ignore_trailing, const bool testing )
{
int retval = 0;
@@ -552,10 +552,10 @@ int decompress( const int infd, const Pretty_print & pp,
const int size = rdec.read_data( header.data, File_header::size );
if( rdec.finished() ) // End Of File
{
- if( first_member )
+ if( first_member || header.verify_prefix( size ) )
{ pp( "File ends unexpectedly at member header." ); retval = 2; }
else if( size > 0 && !show_trailing_data( header.data, size, pp,
- true, ignore_garbage ) )
+ true, ignore_trailing ) )
retval = 2;
break;
}
@@ -563,7 +563,7 @@ int decompress( const int infd, const Pretty_print & pp,
{
if( first_member )
{ pp( "Bad magic number (file not in lzip format)." ); retval = 2; }
- else if( !show_trailing_data( header.data, size, pp, false, ignore_garbage ) )
+ else if( !show_trailing_data( header.data, size, pp, false, ignore_trailing ) )
retval = 2;
break;
}
@@ -576,14 +576,13 @@ int decompress( const int infd, const Pretty_print & pp,
retval = 2; break;
}
const unsigned dictionary_size = header.dictionary_size();
- if( dictionary_size < min_dictionary_size ||
- dictionary_size > max_dictionary_size )
+ if( !isvalid_ds( dictionary_size ) )
{ pp( "Invalid dictionary size in member header." ); retval = 2; break; }
if( verbosity >= 2 || ( verbosity == 1 && first_member ) )
- { pp(); show_header( header ); }
+ { pp(); show_header( dictionary_size ); }
- LZ_decoder decoder( header, rdec, outfd );
+ LZ_decoder decoder( rdec, dictionary_size, outfd );
const int result = decoder.decode_member( pp );
partial_file_pos += rdec.member_position();
if( result != 0 )
@@ -626,24 +625,18 @@ 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 );
}
@@ -665,18 +658,16 @@ void show_progress( const unsigned long long partial_size,
static const Matchfinder_base * mb = 0;
static const Pretty_print * pp = 0;
- if( verbosity >= 2 )
+ if( verbosity < 2 ) return;
+ if( m ) // initialize static vars
+ { csize = cfile_size; psize = partial_size; mb = m; pp = p; }
+ if( mb && pp )
{
- if( m ) // initialize static vars
- { csize = cfile_size; psize = partial_size; mb = m; pp = p; }
- if( mb && pp )
- {
- const unsigned long long pos = psize + mb->data_position();
- if( csize > 0 )
- std::fprintf( stderr, "%4llu%%", pos / csize );
- std::fprintf( stderr, " %.1f MB\r", pos / 1000000.0 );
- pp->reset(); (*pp)(); // restore cursor position
- }
+ const unsigned long long pos = psize + mb->data_position();
+ if( csize > 0 )
+ std::fprintf( stderr, "%4llu%%", pos / csize );
+ std::fprintf( stderr, " %.1f MB\r", pos / 1000000.0 );
+ pp->reset(); (*pp)(); // restore cursor position
}
}
@@ -708,7 +699,7 @@ int main( const int argc, const char * const argv[] )
int infd = -1;
Mode program_mode = m_compress;
bool force = false;
- bool ignore_garbage = true;
+ bool ignore_trailing = true;
bool keep_input_files = false;
bool recompress = false;
bool to_stdout = false;
@@ -744,7 +735,7 @@ int main( const int argc, const char * const argv[] )
{ 't', "test", Arg_parser::no },
{ 'v', "verbose", Arg_parser::no },
{ 'V', "version", Arg_parser::no },
- { 0 , 0, Arg_parser::no } };
+ { 0 , 0, Arg_parser::no } };
const Arg_parser parser( argc, argv, options );
if( parser.error().size() ) // bad option
@@ -756,15 +747,15 @@ 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':
zero = ( code == '0' );
encoder_options = option_mapping[code-'0']; break;
- case 'a': ignore_garbage = false; break;
- case 'b': member_size = getnum( arg.c_str(), 100000, max_member_size );
- break;
+ case 'a': ignore_trailing = false; break;
+ case 'b': member_size = getnum( ptr, 100000, max_member_size ); break;
case 'c': to_stdout = true; break;
case 'd': program_mode = m_decompress; break;
case 'f': force = true; break;
@@ -772,15 +763,14 @@ int main( const int argc, const char * const argv[] )
case 'h': show_help(); return 0;
case 'k': keep_input_files = true; break;
case 'm': encoder_options.match_len_limit =
- getnum( arg.c_str(), min_match_len_limit, max_match_len );
+ getnum( ptr, min_match_len_limit, max_match_len );
zero = false; break;
case 'n': 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 );
zero = false; break;
- case 'S': volume_size = getnum( arg.c_str(), 100000, max_volume_size );
- break;
+ case 'S': volume_size = getnum( ptr, 100000, max_volume_size ); break;
case 't': program_mode = m_test; break;
case 'v': if( verbosity < 4 ) ++verbosity; break;
case 'V': show_version(); return 0;
@@ -816,6 +806,7 @@ int main( const int argc, const char * const argv[] )
Pretty_print pp( filenames, verbosity );
int retval = 0;
+ bool stdin_used = false;
for( unsigned i = 0; i < filenames.size(); ++i )
{
struct stat in_stats;
@@ -823,6 +814,7 @@ 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 )
@@ -834,8 +826,7 @@ int main( const int argc, const char * const argv[] )
if( program_mode == m_compress )
set_c_outname( default_output_filename, volume_size > 0 );
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;
@@ -859,8 +850,7 @@ int main( const int argc, const char * const argv[] )
if( program_mode == m_compress )
set_c_outname( input_filename, volume_size > 0 );
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;
@@ -870,10 +860,12 @@ 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;
pp.set_name( input_filename );
int tmp;
@@ -881,7 +873,7 @@ int main( const int argc, const char * const argv[] )
tmp = compress( member_size, volume_size, infd, encoder_options, pp,
in_statsp, zero );
else
- tmp = decompress( infd, pp, ignore_garbage, program_mode == m_test );
+ tmp = decompress( infd, pp, ignore_trailing, program_mode == m_test );
if( tmp > retval ) retval = tmp;
if( tmp && program_mode != m_test ) cleanup_and_fail( retval );