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authorDaniel Baumann <mail@daniel-baumann.ch>2015-11-07 15:08:12 +0000
committerDaniel Baumann <mail@daniel-baumann.ch>2015-11-07 15:08:12 +0000
commit9eab306d85e2f8e6ba93f33ce3c04f238e969b67 (patch)
treef832251ea988b9ee317ba7a6f0defea0c77fbea4 /main.cc
parentInitial commit. (diff)
downloadplzip-9eab306d85e2f8e6ba93f33ce3c04f238e969b67.tar.xz
plzip-9eab306d85e2f8e6ba93f33ce3c04f238e969b67.zip
Adding upstream version 0.1.upstream/0.1
Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>
Diffstat (limited to '')
-rw-r--r--main.cc1300
1 files changed, 1300 insertions, 0 deletions
diff --git a/main.cc b/main.cc
new file mode 100644
index 0000000..b2bf014
--- /dev/null
+++ b/main.cc
@@ -0,0 +1,1300 @@
+/* Plzip - A parallel version of the lzip data compressor
+ Copyright (C) 2009 Laszlo Ersek.
+ Copyright (C) 2009 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 plzip to panic.
+*/
+
+#define _FILE_OFFSET_BITS 64
+
+#include <algorithm>
+#include <cassert>
+#include <cerrno>
+#include <climits>
+#include <csignal>
+#include <cstdarg> /* va_list */
+#include <cstddef>
+#include <cstdio> /* flockfile() */
+#include <cstdlib>
+#include <cstring> /* strerror() */
+#include <string>
+#include <vector>
+#include <fcntl.h> /* open() */
+#include <stdint.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <utime.h>
+#include <sys/stat.h>
+#include <lzlib.h>
+
+#if CHAR_BIT != 8
+# error "Environments where CHAR_BIT != 8 are not supported."
+#endif
+
+#include "arg_parser.h"
+#include "main.h"
+#include "plzip.h"
+
+#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
+
+void internal_error( const char * msg );
+int readblock( const int fd, char * buf, const int size ) throw();
+int writeblock( const int fd, const char * buf, const int size ) throw();
+
+
+namespace {
+
+const char * invocation_name = 0;
+const char * const Program_name = "Plzip";
+const char * const program_name = "plzip";
+const char * const program_year = "2009";
+
+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 };
+
+std::string output_filename;
+int outhandle = -1;
+int verbosity = 0;
+bool delete_output_on_interrupt = false;
+
+class Pretty_print
+ {
+ const char * const stdin_name;
+ const unsigned int stdin_name_len;
+ unsigned int longest_name;
+ std::string name_;
+ mutable bool first_post;
+
+public:
+ Pretty_print( const std::vector< std::string > & filenames )
+ : stdin_name( "(stdin)" ), stdin_name_len( std::strlen( stdin_name ) ),
+ longest_name( 0 ), first_post( false )
+ {
+ for( unsigned int i = 0; i < filenames.size(); ++i )
+ {
+ const std::string & s = filenames[i];
+ const unsigned int len = ( ( s == "-" ) ? stdin_name_len : s.size() );
+ if( len > longest_name ) longest_name = len;
+ }
+ if( longest_name == 0 ) longest_name = stdin_name_len;
+ }
+
+ void set_name( const std::string & filename )
+ {
+ if( filename.size() && filename != "-" ) name_ = filename;
+ else name_ = stdin_name;
+ first_post = true;
+ }
+
+ void reset() const throw() { if( name_.size() ) first_post = true; }
+ const char * name() const throw() { return name_.c_str(); }
+ void operator()( const char * const msg = 0 ) const throw();
+ };
+
+
+void show_help() throw()
+ {
+ std::printf( "%s - A parallel version of the lzip data compressor.\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( " -k, --keep keep (don't delete) input files\n" );
+// std::printf( " -m, --match-length=<n> set match length limit in bytes [80]\n" );
+ std::printf( " -n, --threads=<n> set the number of (de)compression threads\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( " -1 .. -9 set compression level [default 6]\n" );
+ std::printf( " --fast alias for -1\n" );
+ std::printf( " --best alias for -9\n" );
+ if( verbosity > 0 )
+ {
+ std::printf( " -D, --debug=<level> (0-3) print debug statistics to stderr\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" );
+ }
+
+
+void show_version() throw()
+ {
+ std::printf( "%s %s\n", Program_name, PROGVERSION );
+ std::printf( "Copyright (C) 2009 Laszlo Ersek.\n" );
+ 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" );
+ }
+
+
+long long getnum( const char * ptr, const int bs = 0,
+ const long long llimit = LLONG_MIN + 1,
+ const long long ulimit = LLONG_MAX ) throw()
+ {
+ errno = 0;
+ char *tail;
+ long long result = strtoll( ptr, &tail, 0 );
+ if( tail == ptr )
+ {
+ show_error( "bad or missing numerical argument", 0, true );
+ std::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 );
+ std::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" );
+ std::exit( 1 );
+ }
+ return result;
+ }
+
+
+int get_dict_size( const char * arg ) throw()
+ {
+ char *tail;
+ int bits = std::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 );
+ }
+
+
+int extension_index( const std::string & name ) throw()
+ {
+ for( int i = 0; known_extensions[i].from; ++i )
+ {
+ const std::string ext( known_extensions[i].from );
+ if( name.size() > ext.size() &&
+ name.compare( name.size() - ext.size(), ext.size(), ext ) == 0 )
+ return i;
+ }
+ return -1;
+ }
+
+
+int open_instream( const std::string & name, struct stat * in_statsp,
+ const Mode program_mode, const int eindex,
+ const bool force, const bool to_stdout ) throw()
+ {
+ int inhandle = -1;
+ if( program_mode == m_compress && !force && eindex >= 0 )
+ {
+ if( verbosity >= 0 )
+ std::fprintf( stderr, "%s: input file `%s' already has `%s' suffix.\n",
+ program_name, name.c_str(),
+ known_extensions[eindex].from );
+ }
+ else
+ {
+ inhandle = open( name.c_str(), O_RDONLY );
+ if( inhandle < 0 )
+ {
+ if( verbosity >= 0 )
+ std::fprintf( stderr, "%s: Can't open input file `%s': %s.\n",
+ program_name, name.c_str(), std::strerror( errno ) );
+ }
+ else
+ {
+ const int i = fstat( inhandle, 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 )
+ std::fprintf( stderr, "%s: input file `%s' is not a regular file%s.\n",
+ program_name, name.c_str(),
+ to_stdout ? "" : " and `--stdout' was not specified" );
+ close( inhandle );
+ inhandle = -1;
+ }
+ }
+ }
+ return inhandle;
+ }
+
+
+void set_c_outname( const std::string & name ) throw()
+ {
+ output_filename = name;
+ output_filename += known_extensions[0].from;
+ }
+
+
+void set_d_outname( const std::string & name, const int i ) throw()
+ {
+ if( i >= 0 )
+ {
+ const std::string from( known_extensions[i].from );
+ if( name.size() > from.size() )
+ {
+ output_filename.assign( name, 0, name.size() - from.size() );
+ output_filename += known_extensions[i].to;
+ return;
+ }
+ }
+ output_filename = name; output_filename += ".out";
+ if( verbosity >= 0 )
+ std::fprintf( stderr, "%s: can't guess original name for `%s' -- using `%s'.\n",
+ program_name, name.c_str(), output_filename.c_str() );
+ }
+
+
+bool open_outstream( const bool force ) throw()
+ {
+ if( force )
+ outhandle = open( output_filename.c_str(), O_CREAT | O_TRUNC | O_WRONLY,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH );
+ else outhandle = open( output_filename.c_str(), O_CREAT | O_EXCL | O_WRONLY,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH );
+ if( outhandle < 0 )
+ {
+ if( errno == EEXIST ) outhandle = -2; else outhandle = -1;
+ if( verbosity >= 0 )
+ {
+ if( outhandle == -2 )
+ std::fprintf( stderr, "%s: Output file %s already exists, skipping.\n",
+ program_name, output_filename.c_str() );
+ else
+ std::fprintf( stderr, "%s: Can't create output file `%s': %s.\n",
+ program_name, output_filename.c_str(), std::strerror( errno ) );
+ }
+ }
+ return ( outhandle >= 0 );
+ }
+
+
+bool check_tty( const int inhandle, const Mode program_mode ) throw()
+ {
+ if( program_mode == m_compress && isatty( outhandle ) )
+ {
+ 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( inhandle ) )
+ {
+ show_error( "I won't read compressed data from a terminal.", 0, true );
+ return false;
+ }
+ return true;
+ }
+
+
+void cleanup_and_fail( const int retval ) throw()
+ {
+ if( delete_output_on_interrupt )
+ {
+ if( verbosity >= 0 )
+ std::fprintf( stderr, "%s: Deleting output file `%s', if it exists.\n",
+ program_name, output_filename.c_str() );
+ if( outhandle >= 0 ) { close( outhandle ); outhandle = -1; }
+ if( std::remove( output_filename.c_str() ) != 0 )
+ show_error( "WARNING: deletion of output file (apparently) failed." );
+ }
+ std::exit( retval );
+ }
+
+
+ // Set permissions, owner and times.
+void close_and_set_permissions( const struct stat * in_statsp, int * retvalp )
+ {
+ int tmp = 0;
+ if( in_statsp )
+ {
+ if( fchmod( outhandle, in_statsp->st_mode ) != 0 ) tmp = 1;
+ if( !tmp ) (void)fchown( outhandle, in_statsp->st_uid, in_statsp->st_gid );
+ // fchown will in many cases return with EPERM, which can be safely ignored.
+ }
+ if( close( outhandle ) == 0 ) outhandle = -1;
+ else cleanup_and_fail( 1 );
+ delete_output_on_interrupt = false;
+ if( !in_statsp ) return;
+ if( !tmp )
+ {
+ struct utimbuf t;
+ t.actime = in_statsp->st_atime;
+ t.modtime = in_statsp->st_mtime;
+ if( utime( output_filename.c_str(), &t ) != 0 ) tmp = 1;
+ }
+ if( tmp )
+ {
+ if( tmp > *retvalp ) *retvalp = tmp;
+ show_error( "I can't change output file attributes." );
+ cleanup_and_fail( *retvalp );
+ }
+ }
+
+
+int decompress( const int inhandle, const Pretty_print & pp,
+ const bool testing )
+ {
+ void * decoder = LZ_decompress_open();
+ if( !decoder || LZ_decompress_errno( decoder ) != LZ_ok )
+ {
+ LZ_decompress_close( decoder );
+ pp( "not enough memory. Find a machine with more memory" );
+ return 1;
+ }
+ if( verbosity >= 1 ) pp();
+
+ const int in_buffer_size = 65536, out_buffer_size = 8 * in_buffer_size;
+ uint8_t in_buffer[in_buffer_size], out_buffer[out_buffer_size];
+ int in_pos = 0, in_stream_pos = 0;
+ bool finished = false;
+ while( true )
+ {
+ int in_size = 0;
+ if( !finished )
+ {
+ if( in_stream_pos == 0 )
+ in_stream_pos = readblock( inhandle, (char *)in_buffer, in_buffer_size );
+ if( in_pos < in_stream_pos )
+ {
+ in_size = LZ_decompress_write( decoder, in_buffer + in_pos, in_stream_pos - in_pos );
+ in_pos += in_size;
+ }
+ if( in_pos >= in_stream_pos )
+ {
+ if( in_stream_pos < in_buffer_size )
+ { finished = true; LZ_decompress_finish( decoder ); }
+ in_stream_pos = 0; in_pos = 0;
+ }
+ }
+ int out_size = LZ_decompress_read( decoder, out_buffer, out_buffer_size );
+// std::fprintf( stderr, "%5d in_size, %6d out_size.\n", in_size, out_size );
+ if( out_size < 0 )
+ {
+ const LZ_errno lz_errno = LZ_decompress_errno( decoder );
+ if( lz_errno == LZ_header_error )
+ {
+ if( LZ_decompress_total_out_size( decoder ) > 0 )
+ break; // trailing garbage
+ pp( "error reading member header" );
+ return 1;
+ }
+ if( lz_errno == LZ_mem_error )
+ {
+ pp( "not enough memory. Find a machine with more memory" );
+ return 1;
+ }
+ if( lz_errno == LZ_unexpected_eof )
+ {
+ if( verbosity >= 0 )
+ { pp();
+ std::fprintf( stderr, "file ends unexpectedly at pos %lld\n",
+ LZ_decompress_total_in_size( decoder ) ); }
+ return 2;
+ }
+ pp(); show_error( "read error", errno ); return 1;
+ }
+ else if( out_size > 0 && outhandle >= 0 )
+ {
+ const int wr = writeblock( outhandle, (char *)out_buffer, out_size );
+ if( wr != out_size )
+ { pp(); show_error( "write error", errno ); return 1; }
+ }
+ if( LZ_decompress_finished( decoder ) == 1 ) break;
+ if( finished && in_size == 0 && out_size == 0 )
+ internal_error( "library error (LZ_decompress_read)" );
+ }
+ if( verbosity >= 1 )
+ { if( testing ) std::fprintf( stderr, "ok\n" );
+ else std::fprintf( stderr, "done\n" ); }
+ LZ_decompress_close( decoder );
+ return 0;
+ }
+
+
+extern "C" void signal_handler( int ) throw()
+ {
+ show_error( "Control-C or similar caught, quitting." );
+ cleanup_and_fail( 1 );
+ }
+
+
+void set_signals() throw()
+ {
+ signal( SIGHUP, signal_handler );
+ signal( SIGINT, signal_handler );
+ signal( SIGTERM, signal_handler );
+ }
+
+} // end namespace
+
+
+void Pretty_print::operator()( const char * const msg ) const throw()
+ {
+ if( verbosity >= 0 )
+ {
+ if( first_post )
+ {
+ first_post = false;
+ std::fprintf( stderr, " %s: ", name_.c_str() );
+ for( unsigned int i = 0; i < longest_name - name_.size(); ++i )
+ std::fprintf( stderr, " " );
+ if( !msg ) std::fflush( stderr );
+ }
+ if( msg ) std::fprintf( stderr, "%s.\n", msg );
+ }
+ }
+
+
+/* Private stuff needed by fatal(). */
+static pthread_t main_thread;
+
+static pid_t pid;
+
+
+/* Public utility variables and functions. */
+void *(*mallocf)(size_t size);
+void (*freef)(void *ptr);
+
+
+/*
+ This can be called from any thread, main thread or sub-threads alike, since
+ they all call common helper functions that call fatal() in case of an error.
+*/
+void
+fatal(void)
+{
+ if( pthread_equal(pthread_self(), main_thread) )
+ cleanup_and_fail( 1 );
+ else
+ {
+ if (0 == kill(pid, SIGUSR1))
+ pthread_exit(0);
+ }
+ _exit(EXIT_FAILURE);
+}
+
+
+void
+fail(const char *fmt, int err, ...)
+{
+ va_list args;
+
+ /* Locking stderr should also protect strerror(). */
+ flockfile(stderr);
+ (void)fprintf(stderr, "%s: ", program_name);
+
+ va_start(args, err);
+ (void)vfprintf(stderr, fmt, args);
+ va_end(args);
+
+ (void)fprintf(stderr, ": %s\n", strerror(err));
+ funlockfile(stderr);
+ /* Stream stderr is never fully buffered originally. */
+ fatal();
+}
+
+
+void *
+xalloc(size_t size)
+{
+ void *ret = (*mallocf)(size);
+
+ if (0 == ret) {
+ fail("(*mallocf)()", errno);
+ }
+
+ return ret;
+}
+
+
+void
+xinit(Cond *cond)
+{
+ int ret;
+ pthread_mutexattr_t attr;
+
+ ret = pthread_mutexattr_init(&attr);
+ if (0 != ret) {
+ fail("pthread_mutexattr_init()", ret);
+ }
+
+ ret = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
+ if (0 != ret) {
+ fail("pthread_mutexattr_settype()", ret);
+ }
+
+ ret = pthread_mutex_init(&cond->lock, &attr);
+ if (0 != ret) {
+ fail("pthread_mutex_init()", ret);
+ }
+
+ ret = pthread_mutexattr_destroy(&attr);
+ if (0 != ret) {
+ fail("pthread_mutexattr_destroy()", ret);
+ }
+
+ ret = pthread_cond_init(&cond->cond, 0);
+ if (0 != ret) {
+ fail("pthread_cond_init()", ret);
+ }
+
+ cond->ccount = 0lu;
+ cond->wcount = 0lu;
+}
+
+
+void
+xdestroy(Cond *cond)
+{
+ int ret;
+
+ ret = pthread_cond_destroy(&cond->cond);
+ if (0 != ret) {
+ fail("pthread_cond_destroy()", ret);
+ }
+
+ ret = pthread_mutex_destroy(&cond->lock);
+ if (0 != ret) {
+ fail("pthread_mutex_destroy()", ret);
+ }
+}
+
+
+void
+xlock(Cond *cond)
+{
+ int ret;
+
+ ret = pthread_mutex_lock(&cond->lock);
+ if (0 != ret) {
+ fail("pthread_mutex_lock()", ret);
+ }
+}
+
+
+void
+xlock_pred(Cond *cond)
+{
+ xlock(cond);
+ ++cond->ccount;
+}
+
+
+void
+xunlock(Cond *cond)
+{
+ int ret;
+
+ ret = pthread_mutex_unlock(&cond->lock);
+ if (0 != ret) {
+ fail("pthread_mutex_unlock()", ret);
+ }
+}
+
+
+void
+xwait(Cond *cond)
+{
+ int ret;
+
+ ++cond->wcount;
+ ret = pthread_cond_wait(&cond->cond, &cond->lock);
+ if (0 != ret) {
+ fail("pthread_cond_wait()", ret);
+ }
+ ++cond->ccount;
+}
+
+
+void
+xsignal(Cond *cond)
+{
+ int ret;
+
+ ret = pthread_cond_signal(&cond->cond);
+ if (0 != ret) {
+ fail("pthread_cond_signal()", ret);
+ }
+}
+
+
+void
+xbroadcast(Cond *cond)
+{
+ int ret;
+
+ ret = pthread_cond_broadcast(&cond->cond);
+ if (0 != ret) {
+ fail("pthread_cond_broadcast()", ret);
+ }
+}
+
+
+void
+xcreate(pthread_t *thread, void *(*routine)(void *), void *arg)
+{
+ int ret;
+
+ ret = pthread_create(thread, 0, routine, arg);
+ if (0 != ret) {
+ fail("pthread_create()", ret);
+ }
+}
+
+
+void
+xjoin(pthread_t thread)
+{
+ int ret;
+
+ ret = pthread_join(thread, 0);
+ if (0 != ret) {
+ fail("pthread_join()", ret);
+ }
+}
+
+
+void
+xraise(int sig)
+{
+ if (-1 == kill(pid, sig)) {
+ fail("kill()", errno);
+ }
+}
+
+
+/* Private stuff part 2. */
+
+struct Opts
+{
+ unsigned num_worker; /* Start this many worker threads. */
+ unsigned clidx; /* Compression level index in [0u .. 8u]. */
+ int print_cctrs; /* Print condition variable counters. */
+};
+
+/* Backlog factor for all workers together. */
+static const unsigned blf = 3u;
+
+/* Separator characters in environment variable values. No escaping. */
+static const char envsep[] = " \t";
+
+
+static void *
+trace_malloc(size_t size)
+{
+ void *ret;
+ int save_errno = 0;
+
+ ret = malloc(size);
+ if (0 == ret) {
+ save_errno = errno;
+ }
+
+ if (0 > fprintf(stderr, "%lu: malloc(%lu) == %p\n", (long unsigned)pid,
+ (long unsigned)size, ret)
+ ) {
+ fatal();
+ }
+
+ if (0 == ret) {
+ errno = save_errno;
+ }
+
+ return ret;
+}
+
+
+static void
+trace_free(void *ptr)
+{
+ if (0 > fprintf(stderr, "%lu: free(%p)\n", (long unsigned)pid, ptr)) {
+ fatal();
+ }
+ free(ptr);
+}
+
+
+static void
+xsigemptyset(sigset_t *set)
+{
+ if (-1 == sigemptyset(set)) {
+ fail("sigemptyset()", errno);
+ }
+}
+
+
+static void
+xsigaddset(sigset_t *set, int signo)
+{
+ if (-1 == sigaddset(set, signo)) {
+ fail("sigaddset()", errno);
+ }
+}
+
+
+static void
+xsigmask(int how, const sigset_t *set, sigset_t *oset)
+{
+ int ret;
+
+ ret = pthread_sigmask(how, set, oset);
+ if (0 != ret) {
+ fail("pthread_sigmask()", ret);
+ }
+}
+
+
+static void
+xsigaction(int sig, void (*handler)(int))
+{
+ struct sigaction act;
+
+ act.sa_handler = handler;
+ xsigemptyset(&act.sa_mask);
+ act.sa_flags = 0;
+
+ if (-1 == sigaction(sig, &act, 0)) {
+ fail("sigaction()", errno);
+ }
+}
+
+
+enum caught_sig
+{
+ CS_INT = 1,
+ CS_TERM,
+ CS_USR1,
+ CS_USR2
+};
+
+static volatile sig_atomic_t caught_sig;
+
+
+static void
+sighandler(int sig)
+{
+ /* sig_atomic_t is nowhere required to be able to hold signal values. */
+ switch (sig) {
+ case SIGINT:
+ caught_sig = CS_INT;
+ break;
+
+ case SIGTERM:
+ caught_sig = CS_TERM;
+ break;
+
+ case SIGUSR1:
+ caught_sig = CS_USR1;
+ break;
+
+ case SIGUSR2:
+ caught_sig = CS_USR2;
+ break;
+
+ default:
+ assert(0);
+ }
+}
+
+
+static void
+process( const Opts *opts, unsigned num_slot,
+ int infd, int outfd, const Pretty_print & pp, const sigset_t *unblocked )
+{
+ /*
+ We could wait for signals with either sigwait() or sigsuspend(). SUSv2
+ states about sigwait() that its effect on signal actions is unspecified.
+ SUSv3 still claims the same.
+
+ The SUSv2 description of sigsuspend() talks about both the thread and the
+ whole process being suspended until a signal arrives, although thread
+ suspension seems much more likely from the wording. They note that they
+ filed a clarification request for this. SUSv3 cleans this up and chooses
+ thread suspension which was more logical anyway.
+
+ I favor sigsuspend() because I need to re-raise SIGTERM and SIGINT, and
+ unspecified action behavior with sigwait() seems messy.
+
+ 13-OCT-2009 lacos
+ */
+
+ Plzip_arg muxer_arg;
+ pthread_t muxer;
+
+ if( verbosity >= 1 ) pp( "" );
+
+ muxer_arg.num_worker = opts->num_worker;
+ muxer_arg.num_slot = num_slot;
+ muxer_arg.clidx = opts->clidx;
+ muxer_arg.print_cctrs = opts->print_cctrs;
+ muxer_arg.infd = infd;
+ muxer_arg.outfd = outfd;
+ xcreate(&muxer, plzip_wrap, &muxer_arg);
+
+ /* Unblock signals, wait for them, then block them again. */
+ {
+ int ret = sigsuspend(unblocked);
+ assert(-1 == ret && EINTR == errno);
+ }
+
+ switch (caught_sig) {
+ case CS_INT:
+ case CS_TERM: // FIXME remove output file
+ {
+ int sig;
+ sigset_t mask;
+
+ sig = (CS_INT == caught_sig) ? SIGINT : SIGTERM;
+ /*
+ We might have inherited a SIG_IGN from the parent, but that would
+ make no sense here. 24-OCT-2009 lacos
+ */
+ xsigaction(sig, SIG_DFL);
+ xraise(sig);
+
+ xsigemptyset(&mask);
+ xsigaddset(&mask, sig);
+ xsigmask(SIG_UNBLOCK, &mask, 0);
+ }
+ /*
+ We shouldn't reach this point, but if we do for some reason, fall
+ through.
+ */
+
+ case CS_USR1:
+ /* Error from a non-main thread via fatal(). */
+ fatal();
+
+ case CS_USR2:
+ /* Muxer thread joined other sub-threads and finished successfully. */
+ break;
+
+ default:
+ assert(0);
+ }
+
+ xjoin(muxer);
+}
+
+
+static void
+sigs_mod(int block_n_catch, sigset_t *oset)
+{
+ void (*handler)(int);
+
+ if (block_n_catch) {
+ sigset_t mask;
+
+ xsigemptyset(&mask);
+ xsigaddset(&mask, SIGINT);
+ xsigaddset(&mask, SIGTERM);
+ xsigaddset(&mask, SIGUSR1);
+ xsigaddset(&mask, SIGUSR2);
+ xsigmask(SIG_BLOCK, &mask, oset);
+
+ handler = sighandler;
+ }
+ else {
+ handler = SIG_DFL;
+ }
+
+ xsigaction(SIGINT, handler);
+ xsigaction(SIGTERM, handler);
+ xsigaction(SIGUSR1, handler);
+ xsigaction(SIGUSR2, handler);
+
+ if (!block_n_catch) {
+ xsigmask(SIG_SETMASK, oset, 0);
+ }
+}
+
+
+void show_error( const char * msg, const int errcode, const bool help ) throw()
+ {
+ if( verbosity >= 0 )
+ {
+ if( msg && msg[0] != 0 )
+ {
+ std::fprintf( stderr, "%s: %s", program_name, msg );
+ if( errcode > 0 ) std::fprintf( stderr, ": %s", std::strerror( errcode ) );
+ std::fprintf( stderr, "\n" );
+ }
+ if( help && invocation_name && invocation_name[0] != 0 )
+ std::fprintf( stderr, "Try `%s --help' for more information.\n", invocation_name );
+ }
+ }
+
+
+void internal_error( const char * msg )
+ {
+ std::string s( "internal error: " ); s += msg;
+ show_error( s.c_str() );
+ std::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, char * buf, const int size ) throw()
+ {
+ 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 char * buf, const int size ) throw()
+ {
+ 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;
+ }
+
+
+int main( const int argc, const char * argv[] )
+ {
+ Opts opts;
+ // Mapping from gzip/bzip2 style 1..9 compression modes
+ // to the corresponding LZMA compression modes.
+ const lzma_options option_mapping[] =
+ {
+ { 1 << 20, 10 }, // -1
+ { 1 << 20, 12 }, // -2
+ { 1 << 20, 17 }, // -3
+ { 1 << 21, 26 }, // -4
+ { 1 << 22, 44 }, // -5
+ { 1 << 23, 80 }, // -6
+ { 1 << 24, 108 }, // -7
+ { 1 << 24, 163 }, // -8
+ { 1 << 25, 273 } }; // -9
+ lzma_options encoder_options = option_mapping[5]; // default = "-6"
+ int inhandle = -1;
+ Mode program_mode = m_compress;
+ bool force = false;
+ bool keep_input_files = false;
+ bool to_stdout = false;
+ std::string input_filename;
+ std::string default_output_filename;
+ std::vector< std::string > filenames;
+ invocation_name = argv[0];
+
+ if( LZ_version()[0] != LZ_version_string[0] )
+ internal_error( "bad library version" );
+
+ main_thread = pthread_self();
+ pid = getpid();
+
+ mallocf = malloc;
+ freef = free;
+
+ xsigaction(SIGPIPE, SIG_IGN);
+ xsigaction(SIGXFSZ, SIG_IGN);
+
+ /* Effectuate option defaults. */
+ long max_worker = sysconf(_SC_THREAD_THREADS_MAX);
+ if (-1L == max_worker) {
+ max_worker = LONG_MAX;
+ }
+ if (UINT_MAX < (long unsigned)max_worker) {
+ max_worker = UINT_MAX;
+ }
+ if (UINT_MAX / blf < (unsigned)max_worker) {
+ max_worker = UINT_MAX / blf;
+ }
+ if ((size_t)-1 / sizeof(pthread_t) < (unsigned)max_worker) {
+ max_worker = (size_t)-1 / sizeof(pthread_t);
+ }
+
+ opts.num_worker = 0u;
+ opts.clidx = 5u;
+ opts.print_cctrs = 0;
+
+ const Arg_parser::Option options[] =
+ {
+ { '1', "fast", Arg_parser::no },
+ { '2', 0, Arg_parser::no },
+ { '3', 0, Arg_parser::no },
+ { '4', 0, Arg_parser::no },
+ { '5', 0, Arg_parser::no },
+ { '6', 0, Arg_parser::no },
+ { '7', 0, Arg_parser::no },
+ { '8', 0, Arg_parser::no },
+ { '9', "best", Arg_parser::no },
+ { 'b', "member-size", Arg_parser::yes },
+ { 'c', "stdout", Arg_parser::no },
+ { 'd', "decompress", Arg_parser::no },
+ { 'D', "debug", Arg_parser::yes },
+ { 'f', "force", Arg_parser::no },
+ { 'h', "help", Arg_parser::no },
+ { 'k', "keep", Arg_parser::no },
+ { 'm', "match-length", Arg_parser::yes },
+ { 'n', "threads", Arg_parser::yes },
+ { 'o', "output", Arg_parser::yes },
+ { 'q', "quiet", Arg_parser::no },
+ { 's', "dictionary-size", Arg_parser::yes },
+ { 'S', "volume-size", Arg_parser::yes },
+ { 't', "test", Arg_parser::no },
+ { 'v', "verbose", Arg_parser::no },
+ { 'V', "version", Arg_parser::no },
+ { 0 , 0, Arg_parser::no } };
+
+ Arg_parser parser( argc, argv, options );
+ if( parser.error().size() ) // bad option
+ { show_error( parser.error().c_str(), 0, true ); return 1; }
+
+ int argind = 0;
+ for( ; argind < parser.arguments(); ++argind )
+ {
+ const int code = parser.code( argind );
+ if( !code ) break; // no more options
+ const char * arg = parser.argument( argind ).c_str();
+ switch( code )
+ {
+ case '1': case '2': case '3':
+ case '4': case '5': case '6':
+ case '7': case '8': case '9':
+ opts.clidx = code - '1';
+ encoder_options = option_mapping[code-'1']; break;
+ case 'c': to_stdout = true; break;
+ case 'd': program_mode = m_decompress; break;
+ case 'D': { int debug_level = getnum( arg, 0, 0, 3 );
+ if( debug_level & 1 ) opts.print_cctrs = 1;
+ if( debug_level & 2 )
+ { mallocf = trace_malloc; freef = trace_free; } }
+ break;
+ 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, 5, 273 ); break;
+ case 'o': default_output_filename = arg; break;
+ case 'n': opts.num_worker = getnum( arg, 0, 1, max_worker ); break;
+ case 'q': verbosity = -1; break;
+ case 's': encoder_options.dictionary_size = get_dict_size( arg );
+ 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" );
+ }
+ }
+
+ if( opts.num_worker <= 0 )
+ {
+#ifdef _SC_NPROCESSORS_ONLN
+ long num_online = sysconf( _SC_NPROCESSORS_ONLN );
+ if( num_online <= 0 )
+ {
+ show_error( "number of online processors unavailable.", 0, true );
+ fatal();
+ }
+ opts.num_worker = std::min( num_online, max_worker );
+#else
+ show_error( "number of (de)compression threads not set.", 0, true );
+ fatal();
+#endif
+ }
+ assert(UINT_MAX / blf >= opts.num_worker);
+ unsigned num_slot = opts.num_worker * blf;
+
+ bool filenames_given = false;
+ for( ; argind < parser.arguments(); ++argind )
+ {
+ if( parser.argument( argind ) != "-" ) filenames_given = true;
+ filenames.push_back( parser.argument( argind ) );
+ }
+
+ if( filenames.empty() ) filenames.push_back("-");
+ if( filenames_given && program_mode != m_compress ) set_signals();
+
+ Pretty_print pp( filenames );
+ if( program_mode == m_test )
+ outhandle = -1;
+
+ int retval = 0;
+ for( unsigned int i = 0; i < filenames.size(); ++i )
+ {
+ struct stat in_stats;
+ output_filename.clear();
+
+ if( !filenames[i].size() || filenames[i] == "-" )
+ {
+ input_filename.clear();
+ inhandle = STDIN_FILENO;
+ if( program_mode != m_test )
+ {
+ if( to_stdout || !default_output_filename.size() )
+ outhandle = STDOUT_FILENO;
+ else
+ {
+ if( program_mode == m_compress )
+ set_c_outname( default_output_filename );
+ else output_filename = default_output_filename;
+ if( !open_outstream( force ) )
+ {
+ if( outhandle == -1 && retval < 1 ) retval = 1;
+ close( inhandle ); inhandle = -1;
+ continue;
+ }
+ }
+ }
+ }
+ else
+ {
+ input_filename = filenames[i];
+ const int eindex = extension_index( input_filename );
+ inhandle = open_instream( input_filename, &in_stats, program_mode,
+ eindex, force, to_stdout );
+ if( inhandle < 0 ) { if( retval < 1 ) retval = 1; continue; }
+ if( program_mode != m_test )
+ {
+ if( to_stdout ) outhandle = STDOUT_FILENO;
+ else
+ {
+ if( program_mode == m_compress )
+ set_c_outname( input_filename );
+ else set_d_outname( input_filename, eindex );
+ if( !open_outstream( force ) )
+ {
+ if( outhandle == -1 && retval < 1 ) retval = 1;
+ close( inhandle ); inhandle = -1;
+ continue;
+ }
+ }
+ }
+ }
+
+ if( !check_tty( inhandle, program_mode ) ) return 1;
+
+ if( output_filename.size() && !to_stdout && program_mode != m_test )
+ delete_output_on_interrupt = true;
+ const struct stat * in_statsp = input_filename.size() ? &in_stats : 0;
+ pp.set_name( input_filename );
+ int tmp = 0;
+ if( program_mode == m_compress )
+ {
+ sigset_t unblocked;
+ sigs_mod(1, &unblocked);
+ process( &opts, num_slot, inhandle, outhandle, pp, &unblocked );
+ sigs_mod(0, &unblocked);
+ }
+ else
+ tmp = decompress( inhandle, 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, &retval );
+ if( input_filename.size() )
+ {
+ close( inhandle ); inhandle = -1;
+ if( !keep_input_files && !to_stdout && program_mode != m_test )
+ std::remove( input_filename.c_str() );
+ }
+ }
+ if( outhandle >= 0 && close( outhandle ) != 0 )
+ {
+ if( verbosity >= 0 )
+ std::fprintf( stderr, "%s: Can't close stdout: %s.\n",
+ program_name, std::strerror( errno ) );
+ if( retval < 1 ) retval = 1;
+ }
+ return retval;
+ }