diff options
Diffstat (limited to 'main.cc')
| -rw-r--r-- | main.cc | 45 |
1 files changed, 30 insertions, 15 deletions
@@ -67,15 +67,15 @@ enum Mode { m_none, m_append, m_concatenate, m_create, m_extract, m_list }; void show_help( const long num_online ) { - std::printf( "Tarlz is a combined implementation of the tar archiver and the lzip\n" - "compressor. By default tarlz creates, lists and extracts archives in a\n" - "simplified posix pax format compressed with lzip on a per file basis. Each\n" - "tar member is compressed in its own lzip member, as well as the end-of-file\n" - "blocks. This method adds an indexed lzip layer on top of the tar archive,\n" - "making it possible to decode the archive safely in parallel. The resulting\n" - "multimember tar.lz archive is fully backward compatible with standard tar\n" - "tools like GNU tar, which treat it like any other tar.lz archive. Tarlz can\n" - "append files to the end of such compressed archives.\n" + std::printf( "Tarlz is a massively parallel (multi-threaded) combined implementation of\n" + "the tar archiver and the lzip compressor. Tarlz creates, lists and extracts\n" + "archives in a simplified posix pax format compressed with lzip, keeping the\n" + "alignment between tar members and lzip members. This method adds an indexed\n" + "lzip layer on top of the tar archive, making it possible to decode the\n" + "archive safely in parallel. The resulting multimember tar.lz archive is\n" + "fully backward compatible with standard tar tools like GNU tar, which treat\n" + "it like any other tar.lz archive. Tarlz can append files to the end of such\n" + "compressed archives.\n" "\nThe tarlz file format is a safe posix-style backup format. In case of\n" "corruption, tarlz can extract all the undamaged members from the tar.lz\n" "archive, skipping over the damaged members, just like the standard\n" @@ -91,7 +91,7 @@ void show_help( const long num_online ) " -c, --create create a new archive\n" " -C, --directory=<dir> change to directory <dir>\n" " -f, --file=<archive> use archive file <archive>\n" - " -n, --threads=<n> set number of decompression threads [%ld]\n" + " -n, --threads=<n> set number of (de)compression threads [%ld]\n" " -q, --quiet suppress all messages\n" " -r, --append append files to the end of an archive\n" " -t, --list list the contents of an archive\n" @@ -99,9 +99,9 @@ void show_help( const long num_online ) " -x, --extract extract files from an archive\n" " -0 .. -9 set compression level [default 6]\n" " --asolid create solidly compressed appendable archive\n" - " --bsolid create per-data-block compressed archive\n" - " --dsolid create per-directory compressed archive\n" - " --no-solid create per-file compressed archive (default)\n" + " --bsolid create per block compressed archive (default)\n" + " --dsolid create per directory compressed archive\n" + " --no-solid create per file compressed archive\n" " --solid create solidly compressed archive\n" " --anonymous equivalent to '--owner=root --group=root'\n" " --owner=<owner> use <owner> name/ID for files added\n" @@ -239,6 +239,20 @@ int open_outstream( const std::string & name, const bool create ) } +// This can be called from any thread, main thread or sub-threads alike, +// since they all call common helper functions that call cleanup_and_fail() +// in case of an error. +// +void cleanup_and_fail( const int retval ) + { + // only one thread can delete and exit + static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; + + pthread_mutex_lock( &mutex ); // ignore errors to avoid loop + std::exit( retval ); + } + + void show_error( const char * const msg, const int errcode, const bool help ) { if( verbosity < 0 ) return; @@ -342,7 +356,8 @@ int main( const int argc, const char * const argv[] ) for( int argind = 0; argind < parser.arguments(); ++argind ) { const int code = parser.code( argind ); - if( !code ) { ++filenames; continue; } // skip non-options + if( !code ) // skip non-options + { if( parser.argument( argind ).size() ) ++filenames; continue; } const std::string & sarg = parser.argument( argind ); const char * const arg = sarg.c_str(); switch( code ) @@ -394,7 +409,7 @@ int main( const int argc, const char * const argv[] ) case m_none: show_error( "Missing operation.", 0, true ); return 2; case m_append: case m_create: return encode( archive_name, parser, filenames, level, - program_mode == m_append ); + num_workers, debug_level, program_mode == m_append ); case m_concatenate: return concatenate( archive_name, parser, filenames ); case m_extract: case m_list: return decode( archive_name, parser, filenames, num_workers, |