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authorDaniel Baumann <daniel.baumann@progress-linux.org>2019-01-23 17:42:00 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2019-01-23 17:42:00 +0000
commitaa4d2adf37f7449dd1a99df517de0a9ee97867bd (patch)
tree64105f8a638430ae309b44e2a745ff3c027b2eb1 /list_lz.cc
parentAdding upstream version 0.8. (diff)
downloadtarlz-aa4d2adf37f7449dd1a99df517de0a9ee97867bd.tar.xz
tarlz-aa4d2adf37f7449dd1a99df517de0a9ee97867bd.zip
Adding upstream version 0.9.upstream/0.9
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'list_lz.cc')
-rw-r--r--list_lz.cc699
1 files changed, 699 insertions, 0 deletions
diff --git a/list_lz.cc b/list_lz.cc
new file mode 100644
index 0000000..d41d2b7
--- /dev/null
+++ b/list_lz.cc
@@ -0,0 +1,699 @@
+/* Tarlz - Archiver with multimember lzip compression
+ Copyright (C) 2013-2019 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 2 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/>.
+*/
+
+#define _FILE_OFFSET_BITS 64
+
+#include <algorithm>
+#include <cerrno>
+#include <climits>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <queue>
+#include <string>
+#include <vector>
+#include <pthread.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <lzlib.h>
+
+#include "arg_parser.h"
+#include "lzip.h"
+#include "lzip_index.h"
+#include "tarlz.h"
+
+
+// Returns the number of bytes really read.
+// If (returned value < size) and (errno == 0), means EOF was reached.
+//
+int preadblock( const int fd, uint8_t * const buf, const int size,
+ const long long pos )
+ {
+ int sz = 0;
+ errno = 0;
+ while( sz < size )
+ {
+ const int n = pread( fd, buf + sz, size - sz, pos + sz );
+ if( n > 0 ) sz += n;
+ else if( n == 0 ) break; // EOF
+ else if( errno != EINTR ) break;
+ errno = 0;
+ }
+ return sz;
+ }
+
+
+// Returns the number of bytes really written.
+// If (returned value < size), it is always an error.
+//
+int pwriteblock( const int fd, const uint8_t * const buf, const int size,
+ const long long pos )
+ {
+ int sz = 0;
+ errno = 0;
+ while( sz < size )
+ {
+ const int n = pwrite( fd, buf + sz, size - sz, pos + sz );
+ if( n > 0 ) sz += n;
+ else if( n < 0 && errno != EINTR ) break;
+ errno = 0;
+ }
+ return sz;
+ }
+
+
+namespace {
+
+// 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 = 2 )
+ {
+ // 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 xinit_mutex( pthread_mutex_t * const mutex )
+ {
+ const int errcode = pthread_mutex_init( mutex, 0 );
+ if( errcode )
+ { show_error( "pthread_mutex_init", errcode ); cleanup_and_fail(); }
+ }
+
+void xinit_cond( pthread_cond_t * const cond )
+ {
+ const int errcode = pthread_cond_init( cond, 0 );
+ if( errcode )
+ { show_error( "pthread_cond_init", errcode ); cleanup_and_fail(); }
+ }
+
+
+void xdestroy_mutex( pthread_mutex_t * const mutex )
+ {
+ const int errcode = pthread_mutex_destroy( mutex );
+ if( errcode )
+ { show_error( "pthread_mutex_destroy", errcode ); cleanup_and_fail(); }
+ }
+
+void xdestroy_cond( pthread_cond_t * const cond )
+ {
+ const int errcode = pthread_cond_destroy( cond );
+ if( errcode )
+ { show_error( "pthread_cond_destroy", errcode ); cleanup_and_fail(); }
+ }
+
+
+void xlock( pthread_mutex_t * const mutex )
+ {
+ const int errcode = pthread_mutex_lock( mutex );
+ if( errcode )
+ { show_error( "pthread_mutex_lock", errcode ); cleanup_and_fail(); }
+ }
+
+
+void xunlock( pthread_mutex_t * const mutex )
+ {
+ const int errcode = pthread_mutex_unlock( mutex );
+ if( errcode )
+ { show_error( "pthread_mutex_unlock", errcode ); cleanup_and_fail(); }
+ }
+
+
+void xwait( pthread_cond_t * const cond, pthread_mutex_t * const mutex )
+ {
+ const int errcode = pthread_cond_wait( cond, mutex );
+ if( errcode )
+ { show_error( "pthread_cond_wait", errcode ); cleanup_and_fail(); }
+ }
+
+
+void xsignal( pthread_cond_t * const cond )
+ {
+ const int errcode = pthread_cond_signal( cond );
+ if( errcode )
+ { show_error( "pthread_cond_signal", errcode ); cleanup_and_fail(); }
+ }
+
+
+void xbroadcast( pthread_cond_t * const cond )
+ {
+ const int errcode = pthread_cond_broadcast( cond );
+ if( errcode )
+ { show_error( "pthread_cond_broadcast", errcode ); cleanup_and_fail(); }
+ }
+
+
+struct Packet // member name and metadata or error message
+ {
+ enum Status { ok, member_done, error };
+ long member_id; // lzip member containing the header of this tar member
+ std::string line; // member name and metadata ready to print
+ Status status;
+ Packet( const long i, const char * const msg, const Status s = ok )
+ : member_id( i ), line( msg ), status( s ) {}
+ };
+
+
+class Packet_courier // moves packets around
+ {
+public:
+ unsigned ocheck_counter;
+ unsigned owait_counter;
+private:
+ long error_member_id; // first lzip member with error/misalign/eof
+ int deliver_worker_id; // worker queue currently delivering packets
+ int master_worker_id; // worker in charge if error/misalignment/eof
+ std::vector< std::queue< Packet * > > opacket_queues;
+ int num_working; // number of workers still running
+ const int num_workers; // number of workers
+ const unsigned out_slots; // max output packets per queue
+ pthread_mutex_t omutex;
+ pthread_cond_t oav_or_exit; // output packet available or all workers exited
+ std::vector< pthread_cond_t > slot_av; // output slot available
+ pthread_cond_t check_master;
+
+ Packet_courier( const Packet_courier & ); // declared as private
+ void operator=( const Packet_courier & ); // declared as private
+
+public:
+ Packet_courier( const int workers, const int slots )
+ : ocheck_counter( 0 ), owait_counter( 0 ),
+ error_member_id( -1 ), deliver_worker_id( 0 ), master_worker_id( -1 ),
+ opacket_queues( workers ), num_working( workers ),
+ num_workers( workers ), out_slots( slots ), slot_av( workers )
+ {
+ xinit_mutex( &omutex ); xinit_cond( &oav_or_exit );
+ for( unsigned i = 0; i < slot_av.size(); ++i ) xinit_cond( &slot_av[i] );
+ xinit_cond( &check_master );
+ }
+
+ ~Packet_courier()
+ {
+ xdestroy_cond( &check_master );
+ for( unsigned i = 0; i < slot_av.size(); ++i ) xdestroy_cond( &slot_av[i] );
+ xdestroy_cond( &oav_or_exit ); xdestroy_mutex( &omutex );
+ }
+
+ bool mastership_granted() const { return master_worker_id >= 0; }
+
+ bool request_mastership( const long member_id, const int worker_id )
+ {
+ xlock( &omutex );
+ if( mastership_granted() ) // already granted
+ { xunlock( &omutex ); return ( master_worker_id == worker_id ); }
+ if( error_member_id < 0 || error_member_id > member_id )
+ error_member_id = member_id;
+ while( !mastership_granted() && ( worker_id != deliver_worker_id ||
+ !opacket_queues[deliver_worker_id].empty() ) )
+ xwait( &check_master, &omutex );
+ if( !mastership_granted() && worker_id == deliver_worker_id &&
+ opacket_queues[deliver_worker_id].empty() )
+ {
+ master_worker_id = worker_id; // grant mastership
+ for( int i = 0; i < num_workers; ++i ) // delete all packets
+ while( !opacket_queues[i].empty() )
+ opacket_queues[i].pop();
+ xbroadcast( &check_master );
+ xunlock( &omutex );
+ return true;
+ }
+ xunlock( &omutex );
+ return false; // mastership granted to another worker
+ }
+
+ void worker_finished()
+ {
+ // notify muxer when last worker exits
+ xlock( &omutex );
+ if( --num_working == 0 ) xsignal( &oav_or_exit );
+ xunlock( &omutex );
+ }
+
+ // collect a packet from a worker
+ bool collect_packet( Packet * const opacket, const int worker_id )
+ {
+ xlock( &omutex );
+ if( ( mastership_granted() && master_worker_id != worker_id ) ||
+ ( error_member_id >= 0 && error_member_id < opacket->member_id ) )
+ { xunlock( &omutex ); return false; } // reject packet
+ while( opacket_queues[worker_id].size() >= out_slots )
+ xwait( &slot_av[worker_id], &omutex );
+ opacket_queues[worker_id].push( opacket );
+ if( worker_id == deliver_worker_id ) xsignal( &oav_or_exit );
+ xunlock( &omutex );
+ return true;
+ }
+
+ // deliver a packet to muxer
+ // if packet.status == Packet::member_done, move to next queue
+ Packet * deliver_packet()
+ {
+ Packet * opacket = 0;
+ xlock( &omutex );
+ ++ocheck_counter;
+ while( opacket_queues[deliver_worker_id].empty() && num_working > 0 )
+ {
+ ++owait_counter;
+ if( !mastership_granted() && error_member_id >= 0 )
+ xbroadcast( &check_master ); // mastership requested not yet granted
+ xwait( &oav_or_exit, &omutex );
+ }
+ if( !opacket_queues[deliver_worker_id].empty() )
+ {
+ opacket = opacket_queues[deliver_worker_id].front();
+ opacket_queues[deliver_worker_id].pop();
+ if( opacket_queues[deliver_worker_id].size() + 1 == out_slots )
+ xsignal( &slot_av[deliver_worker_id] );
+ if( opacket->status == Packet::member_done && !mastership_granted() )
+ { if( ++deliver_worker_id >= num_workers ) deliver_worker_id = 0; }
+ }
+ xunlock( &omutex );
+ return opacket;
+ }
+
+ bool finished() // all packets delivered to muxer
+ {
+ if( num_working != 0 ) return false;
+ for( int i = 0; i < num_workers; ++i )
+ if( !opacket_queues[i].empty() ) return false;
+ return true;
+ }
+ };
+
+
+/* Return value: -1 = member_end exceeded, 0 = OK,
+ 1 = damaged member, 2 = fatal error.
+ If sizep and error, return in *sizep the number of bytes read. */
+int archive_read_lz( LZ_Decoder * const decoder, const int infd,
+ long long & file_pos, const long long member_end,
+ const long long cdata_size, uint8_t * const buf,
+ const int size,
+ const char ** msg, int * const sizep = 0 )
+ {
+ int sz = 0;
+
+ if( sizep ) *sizep = 0;
+ while( sz < size )
+ {
+ const int rd = LZ_decompress_read( decoder, buf + sz, size - sz );
+ if( rd < 0 )
+ { *msg = LZ_strerror( LZ_decompress_errno( decoder ) ); return 1; }
+ if( rd == 0 && LZ_decompress_finished( decoder ) == 1 )
+ { *msg = "Archive ends unexpectedly."; return 2; }
+ sz += rd; if( sizep ) *sizep = sz;
+ if( sz < size && LZ_decompress_write_size( decoder ) > 0 )
+ {
+ const long long ibuf_size = 16384; // try 65536
+ uint8_t ibuf[ibuf_size];
+ const long long rest = ( file_pos < member_end ) ?
+ member_end - file_pos : cdata_size - file_pos;
+ const int rsize = std::min( LZ_decompress_write_size( decoder ),
+ (int)std::min( ibuf_size, rest ) );
+ if( rsize <= 0 ) LZ_decompress_finish( decoder );
+ else
+ {
+ const int rd = preadblock( infd, ibuf, rsize, file_pos );
+ if( LZ_decompress_write( decoder, ibuf, rd ) != rd )
+ internal_error( "library error (LZ_decompress_write)." );
+ file_pos += rd;
+ if( rd < rsize )
+ {
+ LZ_decompress_finish( decoder );
+ if( errno ) { *msg = "Error reading archive"; return 2; }
+ }
+ }
+ }
+ }
+ return ( file_pos > member_end ) ? -1 : 0;
+ }
+
+
+int list_member_lz( LZ_Decoder * const decoder, const int infd,
+ long long & file_pos, const long long member_end,
+ const long long cdata_size, long long & data_pos,
+ const long long mdata_end, Packet_courier & courier,
+ const Extended & extended, const Tar_header header,
+ Resizable_buffer & rbuf, const long member_id,
+ const int worker_id, const char ** msg, const bool skip )
+ {
+ unsigned long long rest = extended.size;
+ const int rem = extended.size % header_size;
+ const int padding = rem ? header_size - rem : 0;
+ const long long data_rest = mdata_end - ( data_pos + rest + padding );
+ bool master = false;
+
+ if( data_rest < 0 ) // tar member exceeds lzip member end
+ {
+ if( courier.request_mastership( member_id, worker_id ) ) master = true;
+ else return 2;
+ }
+
+ if( verbosity < 0 || skip ) rbuf()[0] = 0;
+ else format_member_name( extended, header, rbuf, verbosity > 0 );
+ Packet * const opacket = new Packet( member_id, rbuf(),
+ data_rest ? Packet::ok : Packet::member_done );
+ courier.collect_packet( opacket, worker_id );
+ if( !data_rest ) { data_pos = mdata_end; return 0; }
+
+ const unsigned bufsize = 32 * header_size;
+ uint8_t buf[bufsize];
+ while( rest > 0 )
+ {
+ const int rsize = ( rest >= bufsize ) ? bufsize : rest + padding;
+ const int ret = archive_read_lz( decoder, infd, file_pos, member_end,
+ cdata_size, buf, rsize, msg );
+ if( ret > 0 ) return ret;
+ data_pos += rsize;
+ if( rest < bufsize ) break;
+ rest -= rsize;
+ }
+ return ( master ? -1 : 0 );
+ }
+
+
+int parse_records_lz( LZ_Decoder * const decoder, const int infd,
+ long long & file_pos, const long long member_end,
+ const long long cdata_size, long long & data_pos,
+ Extended & extended, const Tar_header header,
+ const char ** msg, const bool permissive )
+ {
+ const unsigned long long edsize = parse_octal( header + size_o, size_l );
+ const unsigned long long bufsize = round_up( edsize );
+ if( bufsize == 0 || edsize == 0 || edsize >= 1ULL << 33 )
+ return false; // overflow or no extended data
+ char * const buf = new char[bufsize]; // extended records buffer
+ int retval = archive_read_lz( decoder, infd, file_pos, member_end,
+ cdata_size, (uint8_t *)buf, bufsize, msg );
+ if( retval == 0 )
+ { if( extended.parse( buf, edsize, permissive ) ) data_pos += bufsize;
+ else retval = 1; }
+ delete[] buf;
+ return retval;
+ }
+
+
+struct Worker_arg
+ {
+ const Lzip_index * lzip_index;
+ Packet_courier * courier;
+ const Arg_parser * parser;
+ std::vector< char > * name_pending;
+ int worker_id;
+ int num_workers;
+ int infd;
+ int filenames;
+ bool missing_crc;
+ bool permissive;
+ };
+
+
+ // read lzip members from archive, list their tar members, and
+ // give the produced packets to courier.
+extern "C" void * dworker_l( void * arg )
+ {
+ const Worker_arg & tmp = *(const Worker_arg *)arg;
+ const Lzip_index & lzip_index = *tmp.lzip_index;
+ Packet_courier & courier = *tmp.courier;
+ const Arg_parser & parser = *tmp.parser;
+ std::vector< char > & name_pending = *tmp.name_pending;
+ const int worker_id = tmp.worker_id;
+ const int num_workers = tmp.num_workers;
+ const int infd = tmp.infd;
+ const int filenames = tmp.filenames;
+ const int missing_crc = tmp.missing_crc;
+ const bool permissive = tmp.permissive;
+
+ LZ_Decoder * const decoder = LZ_decompress_open();
+ if( !decoder || LZ_decompress_errno( decoder ) != LZ_ok )
+ { show_error( "Not enough memory." ); cleanup_and_fail(); }
+
+ const long long cdata_size = lzip_index.cdata_size();
+ Resizable_buffer rbuf( initial_line_length );
+ bool master = false;
+ for( long i = worker_id; !master && i < lzip_index.members(); i += num_workers )
+ {
+ long long data_pos = lzip_index.dblock( i ).pos();
+ const long long mdata_end = lzip_index.dblock( i ).end();
+ long long data_end = mdata_end;
+ long long file_pos = lzip_index.mblock( i ).pos();
+ long long member_end = lzip_index.mblock( i ).end();
+
+ Extended extended; // metadata from extended records
+ int retval = 0;
+ bool prev_extended = false; // prev header was extended
+ LZ_decompress_reset( decoder ); // prepare for new member
+ while( true ) // process one tar member per iteration
+ {
+ if( data_pos >= data_end ) break;
+ Tar_header header;
+ const char * msg = 0;
+ const int ret = archive_read_lz( decoder, infd, file_pos, member_end,
+ cdata_size, header, header_size, &msg );
+ if( ret != 0 )
+ {
+ if( !courier.request_mastership( i, worker_id ) ) goto done;
+ master = true;
+ if( ret > 0 )
+ {
+ Packet * const opacket = new Packet( i, msg, Packet::error );
+ courier.collect_packet( opacket, worker_id );
+ goto done;
+ }
+ // member_end exceeded, process rest of file
+ else { data_end = lzip_index.udata_size(); member_end = cdata_size; }
+ }
+ data_pos += header_size;
+ if( !verify_ustar_chksum( header ) )
+ {
+ if( !courier.request_mastership( i, worker_id ) ) goto done;
+ master = true;
+ if( block_is_zero( header, header_size ) ) break; // EOF
+ Packet * const opacket = new Packet( i,
+ ( data_pos > header_size ) ? "Corrupt or invalid header." :
+ "This does not look like a POSIX tar.lz archive.", Packet::error );
+ courier.collect_packet( opacket, worker_id );
+ goto done;
+ }
+
+ const Typeflag typeflag = (Typeflag)header[typeflag_o];
+ if( typeflag == tf_global )
+ {
+ if( prev_extended )
+ { show_error( "Format violation: global header after extended header." );
+ cleanup_and_fail(); }
+ Extended dummy; // global headers are parsed and ignored
+ const int ret = parse_records_lz( decoder, infd, file_pos, member_end,
+ cdata_size, data_pos, dummy, header, &msg, true );
+ if( ret != 0 )
+ {
+ if( !courier.request_mastership( i, worker_id ) ) goto done;
+ master = true;
+ if( ret > 0 )
+ {
+ if( !msg ) msg = "Error in global extended records.";
+ Packet * const opacket = new Packet( i, msg, Packet::error );
+ courier.collect_packet( opacket, worker_id );
+ if( ret == 2 ) goto done;
+ }
+ // member_end exceeded, process rest of file
+ else { data_end = lzip_index.udata_size(); member_end = cdata_size; }
+ }
+ continue;
+ }
+ if( typeflag == tf_extended )
+ {
+ int ret = 0;
+ if( prev_extended && !permissive )
+ { msg = "Format violation: consecutive extended headers found.";
+ ret = 2; }
+ else ret = parse_records_lz( decoder, infd, file_pos, member_end,
+ cdata_size, data_pos, extended, header, &msg, permissive );
+ if( ret == 0 && !extended.crc_present && missing_crc )
+ { msg = "Missing CRC in extended records."; ret = 2; }
+ if( ret != 0 )
+ {
+ if( !courier.request_mastership( i, worker_id ) ) goto done;
+ master = true;
+ if( ret > 0 )
+ {
+ if( !msg ) msg = "Error in extended records.";
+ Packet * const opacket = new Packet( i, msg, Packet::error );
+ courier.collect_packet( opacket, worker_id );
+ extended.reset();
+ if( ret == 2 ) goto done;
+ }
+ // member_end exceeded, process rest of file
+ else { data_end = lzip_index.udata_size(); member_end = cdata_size; }
+ }
+ prev_extended = true;
+ continue;
+ }
+ prev_extended = false;
+
+ if( extended.linkpath.empty() ) // copy linkpath from ustar header
+ {
+ for( int i = 0; i < linkname_l && header[linkname_o+i]; ++i )
+ extended.linkpath += header[linkname_o+i];
+ while( extended.linkpath.size() > 1 && // trailing '/'
+ extended.linkpath[extended.linkpath.size()-1] == '/' )
+ extended.linkpath.resize( extended.linkpath.size() - 1 );
+ }
+
+ if( extended.path.empty() ) // copy path from ustar header
+ {
+ char stored_name[prefix_l+1+name_l+1];
+ int len = 0;
+ while( len < prefix_l && header[prefix_o+len] )
+ { stored_name[len] = header[prefix_o+len]; ++len; }
+ if( len && header[name_o] ) stored_name[len++] = '/';
+ for( int i = 0; i < name_l && header[name_o+i]; ++i )
+ { stored_name[len] = header[name_o+i]; ++len; }
+ while( len > 0 && stored_name[len-1] == '/' ) --len; // trailing '/'
+ stored_name[len] = 0;
+ extended.path = remove_leading_slash( stored_name );
+ }
+ const char * const filename = extended.path.c_str();
+
+ bool skip = filenames > 0;
+ if( skip )
+ for( int i = 0; i < parser.arguments(); ++i )
+ if( parser.code( i ) == 0 )
+ {
+ const char * const name =
+ remove_leading_slash( parser.argument( i ).c_str() );
+ if( compare_prefix_dir( name, filename ) ||
+ compare_tslash( name, filename ) )
+ { skip = false; name_pending[i] = false; break; }
+ }
+
+ if( extended.size == 0 &&
+ ( typeflag == tf_regular || typeflag == tf_hiperf ) )
+ extended.size = parse_octal( header + size_o, size_l );
+
+ retval = list_member_lz( decoder, infd, file_pos, member_end,
+ cdata_size, data_pos, mdata_end, courier,
+ extended, header, rbuf, i, worker_id, &msg, skip );
+ extended.reset();
+ if( retval < 0 ) // member_end exceeded, process rest of file
+ { master = true;
+ data_end = lzip_index.udata_size(); member_end = cdata_size; }
+ else if( retval > 0 )
+ { show_error( msg );
+ show_error( "Error is not recoverable: exiting now." );
+ cleanup_and_fail(); }
+ }
+ }
+ if( LZ_decompress_close( decoder ) < 0 )
+ {
+ Packet * const opacket = new Packet( lzip_index.members(),
+ "LZ_decompress_close failed.", Packet::error );
+ courier.collect_packet( opacket, worker_id );
+ }
+done:
+ courier.worker_finished();
+ return 0;
+ }
+
+
+ // get from courier the processed and sorted packets, and print
+ // the member lines on stdout or the diagnostics on stderr.
+void muxer( Packet_courier & courier )
+ {
+ while( true )
+ {
+ Packet * const opacket = courier.deliver_packet();
+ if( !opacket ) break; // queue is empty. all workers exited
+
+ if( opacket->status == Packet::error )
+ { show_error( opacket->line.c_str() ); cleanup_and_fail(); }
+ if( opacket->line.size() )
+ { std::fputs( opacket->line.c_str(), stdout );
+ std::fflush( stdout ); }
+ delete opacket;
+ }
+ if( !courier.mastership_granted() ) // no worker found EOF blocks
+ { show_error( "Archive ends unexpectedly." ); cleanup_and_fail(); }
+ }
+
+} // end namespace
+
+
+ // init the courier, then start the workers and call the muxer.
+int list_lz( const Arg_parser & parser, std::vector< char > & name_pending,
+ const Lzip_index & lzip_index, const int filenames,
+ const int debug_level, const int infd, const int num_workers,
+ const bool missing_crc, const bool permissive )
+ {
+ const int out_slots = 100;
+ Packet_courier courier( num_workers, out_slots );
+
+ Worker_arg * worker_args = new( std::nothrow ) Worker_arg[num_workers];
+ pthread_t * worker_threads = new( std::nothrow ) pthread_t[num_workers];
+ if( !worker_args || !worker_threads )
+ { show_error( "Not enough memory." ); cleanup_and_fail(); }
+ for( int i = 0; i < num_workers; ++i )
+ {
+ worker_args[i].lzip_index = &lzip_index;
+ worker_args[i].courier = &courier;
+ worker_args[i].parser = &parser;
+ worker_args[i].name_pending = &name_pending;
+ worker_args[i].worker_id = i;
+ worker_args[i].num_workers = num_workers;
+ worker_args[i].infd = infd;
+ worker_args[i].filenames = filenames;
+ worker_args[i].missing_crc = missing_crc;
+ worker_args[i].permissive = permissive;
+ const int errcode =
+ pthread_create( &worker_threads[i], 0, dworker_l, &worker_args[i] );
+ if( errcode )
+ { show_error( "Can't create worker threads", errcode ); cleanup_and_fail(); }
+ }
+
+ muxer( courier );
+
+ for( int i = num_workers - 1; i >= 0; --i )
+ {
+ const int errcode = pthread_join( worker_threads[i], 0 );
+ if( errcode )
+ { show_error( "Can't join worker threads", errcode ); cleanup_and_fail(); }
+ }
+ delete[] worker_threads;
+ delete[] worker_args;
+
+ int retval = 0;
+ for( int i = 0; i < parser.arguments(); ++i )
+ if( parser.code( i ) == 0 && name_pending[i] )
+ {
+ show_file_error( parser.argument( i ).c_str(), "Not found in archive." );
+ retval = 1;
+ }
+
+ if( debug_level & 1 )
+ std::fprintf( stderr,
+ "muxer tried to consume from workers %8u times\n"
+ "muxer had to wait %8u times\n",
+ courier.ocheck_counter,
+ courier.owait_counter );
+
+ if( !courier.finished() ) internal_error( "courier not finished." );
+ return retval;
+ }