diff options
Diffstat (limited to 'main.cc')
| -rw-r--r-- | main.cc | 90 |
1 files changed, 44 insertions, 46 deletions
@@ -102,7 +102,9 @@ enum Mode { m_compress, m_decompress, m_test }; std::string output_filename; int outfd = -1; int verbosity = 0; -mode_t outfd_mode = S_IRUSR | S_IWUSR; +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; @@ -110,31 +112,31 @@ void show_help() throw() { std::printf( "%s - Data compressor based on the LZMA algorithm.\n", Program_name ); std::printf( "\nUsage: %s [options] [files]\n", invocation_name ); - std::printf( "\nOptions:\n" ); - std::printf( " -h, --help display this help and exit\n" ); - std::printf( " -V, --version output version information and exit\n" ); - std::printf( " -b, --member-size=<n> set member size limit in bytes\n" ); - std::printf( " -c, --stdout send output to standard output\n" ); - std::printf( " -d, --decompress decompress\n" ); - std::printf( " -f, --force overwrite existing output files\n" ); - std::printf( " -F, --recompress force recompression of compressed files\n" ); - std::printf( " -k, --keep keep (don't delete) input files\n" ); - std::printf( " -m, --match-length=<n> set match length limit in bytes [36]\n" ); - std::printf( " -o, --output=<file> if reading stdin, place the output into <file>\n" ); - std::printf( " -q, --quiet suppress all messages\n" ); - std::printf( " -s, --dictionary-size=<n> set dictionary size limit in bytes [8MiB]\n" ); - std::printf( " -S, --volume-size=<n> set volume size limit in bytes\n" ); - std::printf( " -t, --test test compressed file integrity\n" ); - std::printf( " -v, --verbose be verbose (a 2nd -v gives more)\n" ); - std::printf( " -0 .. -9 set compression level [default 6]\n" ); - std::printf( " --fast alias for -0\n" ); - std::printf( " --best alias for -9\n" ); - std::printf( "If no file names are given, %s compresses or decompresses\n", program_name ); - std::printf( "from standard input to standard output.\n" ); - std::printf( "Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,\n" ); - std::printf( "Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...\n" ); - std::printf( "\nReport bugs to lzip-bug@nongnu.org\n" ); - std::printf( "Lzip home page: http://www.nongnu.org/lzip/lzip.html\n" ); + std::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" + " -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" + "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" + "\nReport bugs to lzip-bug@nongnu.org\n" + "Lzip home page: http://www.nongnu.org/lzip/lzip.html\n" ); } @@ -142,9 +144,9 @@ void show_version() throw() { std::printf( "%s %s\n", Program_name, PROGVERSION ); std::printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year ); - std::printf( "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n" ); - std::printf( "This is free software: you are free to change and redistribute it.\n" ); - std::printf( "There is NO WARRANTY, to the extent permitted by law.\n" ); + std::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" ); } @@ -155,10 +157,11 @@ const char * format_num( long long num ) throw() enum { buf_size = 16, factor = 1024 }; static char buf[buf_size]; const char *p = ""; + bool exact = ( num % factor == 0 ); for( int i = 0; i < 8 && ( llabs( num ) > 9999 || - ( llabs( num ) >= factor && num % factor == 0 ) ); ++i ) - { num /= factor; p = prefix[i]; } + ( 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; } @@ -369,31 +372,26 @@ void cleanup_and_fail( const int retval ) throw() // Set permissions, owner and times. void close_and_set_permissions( const struct stat * const in_statsp ) { - bool error = false; + 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 ) - error = true; - // fchown will in many cases return with EPERM, which can be safely ignored. + fchmod( outfd, in_statsp->st_mode ) != 0 ) warning = true; } - if( close( outfd ) == 0 ) outfd = -1; - else cleanup_and_fail( 1 ); + if( close( outfd ) != 0 ) cleanup_and_fail( 1 ); + outfd = -1; delete_output_on_interrupt = false; - if( !in_statsp ) return; - if( !error ) + if( in_statsp ) { struct utimbuf t; t.actime = in_statsp->st_atime; t.modtime = in_statsp->st_mtime; - if( utime( output_filename.c_str(), &t ) != 0 ) error = true; + if( utime( output_filename.c_str(), &t ) != 0 ) warning = true; } - if( error ) - { + if( warning && verbosity >= 1 ) show_error( "Can't change output file attributes." ); - cleanup_and_fail( 1 ); - } } @@ -852,7 +850,7 @@ int main( const int argc, const char * const argv[] ) if( program_mode == m_compress ) set_c_outname( default_output_filename, volume_size != LLONG_MAX ); else output_filename = default_output_filename; - outfd_mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH; + outfd_mode = all_rw; if( !open_outstream( force ) ) { if( outfd == -1 && retval < 1 ) retval = 1; @@ -877,7 +875,7 @@ int main( const int argc, const char * const argv[] ) if( program_mode == m_compress ) set_c_outname( input_filename, volume_size != LLONG_MAX ); else set_d_outname( input_filename, eindex ); - outfd_mode = S_IRUSR | S_IWUSR; + outfd_mode = usr_rw; if( !open_outstream( force ) ) { if( outfd == -1 && retval < 1 ) retval = 1; |