mirror of
https://github.com/transmission/transmission
synced 2024-12-26 01:27:28 +00:00
500 lines
17 KiB
C
500 lines
17 KiB
C
/*
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* This file Copyright (C) 2008-2010 Mnemosyne LLC
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*
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* This file is licensed by the GPL version 2. Works owned by the
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* Transmission project are granted a special exemption to clause 2(b)
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* so that the bulk of its code can remain under the MIT license.
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* This exemption does not extend to derived works not owned by
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* the Transmission project.
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*
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* $Id$
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*/
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#include <errno.h>
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#include <stdio.h> /* printf */
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#include <stdlib.h> /* exit, atoi */
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#include <string.h> /* strcmp */
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#include <sys/types.h> /* umask*/
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#include <sys/stat.h> /* umask*/
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#include <fcntl.h> /* open */
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#include <signal.h>
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#ifdef HAVE_SYSLOG
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#include <syslog.h>
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#endif
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#include <unistd.h> /* daemon */
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#include <event.h>
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#include <libtransmission/transmission.h>
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#include <libtransmission/bencode.h>
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#include <libtransmission/tr-getopt.h>
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#include <libtransmission/utils.h>
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#include <libtransmission/version.h>
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#include "watch.h"
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#define MY_NAME "transmission-daemon"
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#define PREF_KEY_DIR_WATCH "watch-dir"
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#define PREF_KEY_DIR_WATCH_ENABLED "watch-dir-enabled"
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static tr_bool paused = FALSE;
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static tr_bool closing = FALSE;
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static tr_session * mySession = NULL;
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/***
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**** Config File
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***/
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static const char *
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getUsage( void )
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{
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return "Transmission " LONG_VERSION_STRING
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" http://www.transmissionbt.com/\n"
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"A fast and easy BitTorrent client\n"
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"\n"
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MY_NAME " is a headless Transmission session\n"
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"that can be controlled via transmission-remote\n"
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"or the web interface.\n"
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"\n"
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"Usage: " MY_NAME " [options]";
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}
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static const struct tr_option options[] =
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{
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{ 'a', "allowed", "Allowed IP addresses. (Default: " TR_DEFAULT_RPC_WHITELIST ")", "a", 1, "<list>" },
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{ 'b', "blocklist", "Enable peer blocklists", "b", 0, NULL },
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{ 'B', "no-blocklist", "Disable peer blocklists", "B", 0, NULL },
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{ 'c', "watch-dir", "Directory to watch for new .torrent files", "c", 1, "<directory>" },
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{ 'C', "no-watch-dir", "Disable the watch-dir", "C", 0, NULL },
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{ 941, "incomplete-dir", "Where to store new torrents until they're complete", NULL, 1, "<directory>" },
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{ 942, "no-incomplete-dir", "Don't store incomplete torrents in a different location", NULL, 0, NULL },
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{ 'd', "dump-settings", "Dump the settings and exit", "d", 0, NULL },
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{ 'e', "logfile", "Dump the log messages to this filename", "e", 1, "<filename>" },
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{ 'f', "foreground", "Run in the foreground instead of daemonizing", "f", 0, NULL },
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{ 'g', "config-dir", "Where to look for configuration files", "g", 1, "<path>" },
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{ 'p', "port", "RPC port (Default: " TR_DEFAULT_RPC_PORT_STR ")", "p", 1, "<port>" },
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{ 't', "auth", "Require authentication", "t", 0, NULL },
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{ 'T', "no-auth", "Don't require authentication", "T", 0, NULL },
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{ 'u', "username", "Set username for authentication", "u", 1, "<username>" },
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{ 'v', "password", "Set password for authentication", "v", 1, "<password>" },
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{ 'V', "version", "Show version number and exit", "V", 0, NULL },
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{ 'w', "download-dir", "Where to save downloaded data", "w", 1, "<path>" },
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{ 800, "paused", "Pause all torrents on startup", NULL, 0, NULL },
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{ 'o', "dht", "Enable distributed hash tables (DHT)", "o", 0, NULL },
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{ 'O', "no-dht", "Disable distributed hash tables (DHT)", "O", 0, NULL },
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{ 'P', "peerport", "Port for incoming peers (Default: " TR_DEFAULT_PEER_PORT_STR ")", "P", 1, "<port>" },
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{ 'm', "portmap", "Enable portmapping via NAT-PMP or UPnP", "m", 0, NULL },
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{ 'M', "no-portmap", "Disable portmapping", "M", 0, NULL },
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{ 'L', "peerlimit-global", "Maximum overall number of peers (Default: " TR_DEFAULT_PEER_LIMIT_GLOBAL_STR ")", "L", 1, "<limit>" },
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{ 'l', "peerlimit-torrent", "Maximum number of peers per torrent (Default: " TR_DEFAULT_PEER_LIMIT_TORRENT_STR ")", "l", 1, "<limit>" },
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{ 910, "encryption-required", "Encrypt all peer connections", "er", 0, NULL },
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{ 911, "encryption-preferred", "Prefer encrypted peer connections", "ep", 0, NULL },
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{ 912, "encryption-tolerated", "Prefer unencrypted peer connections", "et", 0, NULL },
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{ 'i', "bind-address-ipv4", "Where to listen for peer connections", "i", 1, "<ipv4 address>" },
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{ 'I', "bind-address-ipv6", "Where to listen for peer connections", "I", 1, "<ipv6 address>" },
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{ 'r', "rpc-bind-address", "Where to listen for RPC connections", "r", 1, "<ipv4 address>" },
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{ 953, "global-seedratio", "All torrents, unless overridden by a per-torrent setting, should seed until a specific ratio", "gsr", 1, "ratio" },
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{ 954, "no-global-seedratio", "All torrents, unless overridden by a per-torrent setting, should seed regardless of ratio", "GSR", 0, NULL },
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{ 0, NULL, NULL, NULL, 0, NULL }
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};
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static void
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showUsage( void )
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{
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tr_getopt_usage( MY_NAME, getUsage( ), options );
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exit( 0 );
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}
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static void
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gotsig( int sig )
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{
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switch( sig )
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{
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case SIGHUP:
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{
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tr_benc settings;
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const char * configDir = tr_sessionGetConfigDir( mySession );
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tr_inf( "Reloading settings from \"%s\"", configDir );
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tr_bencInitDict( &settings, 0 );
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tr_sessionLoadSettings( &settings, configDir, MY_NAME );
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tr_sessionSet( mySession, &settings );
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tr_bencFree( &settings );
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tr_sessionReloadBlocklists( mySession );
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break;
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}
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default:
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closing = TRUE;
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break;
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}
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}
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#if defined(WIN32)
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#define USE_NO_DAEMON
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#elif !defined(HAVE_DAEMON) || defined(__UCLIBC__)
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#define USE_TR_DAEMON
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#else
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#define USE_OS_DAEMON
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#endif
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static int
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tr_daemon( int nochdir, int noclose )
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{
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#if defined(USE_OS_DAEMON)
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return daemon( nochdir, noclose );
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#elif defined(USE_TR_DAEMON)
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pid_t pid = fork( );
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if( pid < 0 )
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return -1;
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else if( pid > 0 )
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_exit( 0 );
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else {
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pid = setsid( );
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if( pid < 0 )
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return -1;
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pid = fork( );
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if( pid < 0 )
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return -1;
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else if( pid > 0 )
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_exit( 0 );
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else {
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if( !nochdir )
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if( chdir( "/" ) < 0 )
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return -1;
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umask( (mode_t)0 );
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if( !noclose ) {
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/* send stdin, stdout, and stderr to /dev/null */
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int i;
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int fd = open( "/dev/null", O_RDWR, 0 );
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if( fd < 0 )
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fprintf( stderr, "unable to open /dev/null: %s\n", tr_strerror(errno) );
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for( i=0; i<3; ++i ) {
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if( close( i ) )
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return -1;
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dup2( fd, i );
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}
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close( fd );
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}
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return 0;
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}
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}
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#else /* USE_NO_DAEMON */
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return 0;
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#endif
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}
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static const char*
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getConfigDir( int argc, const char ** argv )
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{
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int c;
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const char * configDir = NULL;
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const char * optarg;
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const int ind = tr_optind;
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while(( c = tr_getopt( getUsage( ), argc, argv, options, &optarg ))) {
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if( c == 'g' ) {
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configDir = optarg;
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break;
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}
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}
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tr_optind = ind;
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if( configDir == NULL )
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configDir = tr_getDefaultConfigDir( MY_NAME );
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return configDir;
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}
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static void
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onFileAdded( tr_session * session, const char * dir, const char * file )
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{
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char * filename = tr_buildPath( dir, file, NULL );
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tr_ctor * ctor = tr_ctorNew( session );
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int err = tr_ctorSetMetainfoFromFile( ctor, filename );
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if( !err )
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{
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tr_torrentNew( ctor, &err );
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if( err == TR_PARSE_ERR )
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tr_err( "Error parsing .torrent file \"%s\"", file );
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else
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{
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tr_bool trash = FALSE;
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int test = tr_ctorGetDeleteSource( ctor, &trash );
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tr_inf( "Parsing .torrent file successful \"%s\"", file );
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if( !test && trash )
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{
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tr_inf( "Deleting input .torrent file \"%s\"", file );
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if( remove( filename ) )
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tr_err( "Error deleting .torrent file: %s", tr_strerror( errno ) );
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}
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}
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}
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tr_ctorFree( ctor );
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tr_free( filename );
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}
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static void
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printMessage( FILE * logfile, int level, const char * name, const char * message, const char * file, int line )
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{
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if( logfile != NULL )
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{
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char timestr[64];
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tr_getLogTimeStr( timestr, sizeof( timestr ) );
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if( name )
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fprintf( logfile, "[%s] %s %s (%s:%d)\n", timestr, name, message, file, line );
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else
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fprintf( logfile, "[%s] %s (%s:%d)\n", timestr, message, file, line );
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}
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#ifdef HAVE_SYSLOG
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else /* daemon... write to syslog */
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{
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int priority;
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/* figure out the syslog priority */
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switch( level ) {
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case TR_MSG_ERR: priority = LOG_ERR; break;
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case TR_MSG_DBG: priority = LOG_DEBUG; break;
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default: priority = LOG_INFO; break;
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}
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if( name )
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syslog( priority, "%s %s (%s:%d)", name, message, file, line );
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else
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syslog( priority, "%s (%s:%d)", message, file, line );
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}
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#endif
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}
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static void
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pumpLogMessages( FILE * logfile )
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{
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const tr_msg_list * l;
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tr_msg_list * list = tr_getQueuedMessages( );
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for( l=list; l!=NULL; l=l->next )
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printMessage( logfile, l->level, l->name, l->message, l->file, l->line );
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tr_freeMessageList( list );
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}
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int
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main( int argc, char ** argv )
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{
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int c;
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const char * optarg;
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tr_benc settings;
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tr_bool boolVal;
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tr_bool loaded;
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tr_bool foreground = FALSE;
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tr_bool dumpSettings = FALSE;
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const char * configDir = NULL;
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dtr_watchdir * watchdir = NULL;
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FILE * logfile = NULL;
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signal( SIGINT, gotsig );
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signal( SIGTERM, gotsig );
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#ifndef WIN32
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signal( SIGHUP, gotsig );
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#endif
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/* load settings from defaults + config file */
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tr_bencInitDict( &settings, 0 );
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configDir = getConfigDir( argc, (const char**)argv );
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loaded = tr_sessionLoadSettings( &settings, configDir, MY_NAME );
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/* overwrite settings from the comamndline */
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tr_optind = 1;
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while(( c = tr_getopt( getUsage(), argc, (const char**)argv, options, &optarg ))) {
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switch( c ) {
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case 'a': tr_bencDictAddStr( &settings, TR_PREFS_KEY_RPC_WHITELIST, optarg );
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tr_bencDictAddBool( &settings, TR_PREFS_KEY_RPC_WHITELIST_ENABLED, TRUE );
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break;
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case 'b': tr_bencDictAddBool( &settings, TR_PREFS_KEY_BLOCKLIST_ENABLED, TRUE );
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break;
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case 'B': tr_bencDictAddBool( &settings, TR_PREFS_KEY_BLOCKLIST_ENABLED, FALSE );
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break;
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case 'c': tr_bencDictAddStr( &settings, PREF_KEY_DIR_WATCH, optarg );
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tr_bencDictAddBool( &settings, PREF_KEY_DIR_WATCH_ENABLED, TRUE );
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break;
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case 'C': tr_bencDictAddBool( &settings, PREF_KEY_DIR_WATCH_ENABLED, FALSE );
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break;
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case 941:
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tr_bencDictAddStr( &settings, TR_PREFS_KEY_INCOMPLETE_DIR, optarg );
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tr_bencDictAddBool( &settings, TR_PREFS_KEY_INCOMPLETE_DIR_ENABLED, TRUE );
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break;
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case 942:
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tr_bencDictAddBool( &settings, TR_PREFS_KEY_INCOMPLETE_DIR_ENABLED, FALSE );
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break;
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case 'd': dumpSettings = TRUE;
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break;
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case 'e': logfile = fopen( optarg, "a+" );
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if( logfile == NULL )
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fprintf( stderr, "Couldn't open \"%s\": %s\n", optarg, tr_strerror( errno ) );
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break;
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case 'f': foreground = TRUE;
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break;
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case 'g': /* handled above */
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break;
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case 'V': /* version */
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fprintf(stderr, "Transmission %s\n", LONG_VERSION_STRING);
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exit( 0 );
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case 'o':
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tr_bencDictAddBool( &settings, TR_PREFS_KEY_DHT_ENABLED, TRUE );
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break;
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case 'O':
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tr_bencDictAddBool( &settings, TR_PREFS_KEY_DHT_ENABLED, FALSE );
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break;
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case 'p': tr_bencDictAddInt( &settings, TR_PREFS_KEY_RPC_PORT, atoi( optarg ) );
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break;
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case 't': tr_bencDictAddBool( &settings, TR_PREFS_KEY_RPC_AUTH_REQUIRED, TRUE );
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break;
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case 'T': tr_bencDictAddBool( &settings, TR_PREFS_KEY_RPC_AUTH_REQUIRED, FALSE );
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break;
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case 'u': tr_bencDictAddStr( &settings, TR_PREFS_KEY_RPC_USERNAME, optarg );
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break;
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case 'v': tr_bencDictAddStr( &settings, TR_PREFS_KEY_RPC_PASSWORD, optarg );
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break;
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case 'w': tr_bencDictAddStr( &settings, TR_PREFS_KEY_DOWNLOAD_DIR, optarg );
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break;
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case 'P': tr_bencDictAddInt( &settings, TR_PREFS_KEY_PEER_PORT, atoi( optarg ) );
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break;
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case 'm': tr_bencDictAddBool( &settings, TR_PREFS_KEY_PORT_FORWARDING, TRUE );
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break;
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case 'M': tr_bencDictAddBool( &settings, TR_PREFS_KEY_PORT_FORWARDING, FALSE );
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break;
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case 'L': tr_bencDictAddInt( &settings, TR_PREFS_KEY_PEER_LIMIT_GLOBAL, atoi( optarg ) );
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break;
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case 'l': tr_bencDictAddInt( &settings, TR_PREFS_KEY_PEER_LIMIT_TORRENT, atoi( optarg ) );
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break;
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case 800: paused = TRUE;
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break;
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case 910: tr_bencDictAddInt( &settings, TR_PREFS_KEY_ENCRYPTION, TR_ENCRYPTION_REQUIRED );
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break;
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case 911: tr_bencDictAddInt( &settings, TR_PREFS_KEY_ENCRYPTION, TR_ENCRYPTION_PREFERRED );
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break;
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case 912: tr_bencDictAddInt( &settings, TR_PREFS_KEY_ENCRYPTION, TR_CLEAR_PREFERRED );
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break;
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case 'i':
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tr_bencDictAddStr( &settings, TR_PREFS_KEY_BIND_ADDRESS_IPV4, optarg );
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break;
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case 'I':
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tr_bencDictAddStr( &settings, TR_PREFS_KEY_BIND_ADDRESS_IPV6, optarg );
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break;
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case 'r':
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tr_bencDictAddStr( &settings, TR_PREFS_KEY_RPC_BIND_ADDRESS, optarg );
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break;
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case 953:
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tr_bencDictAddReal( &settings, TR_PREFS_KEY_RATIO, atof(optarg) );
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tr_bencDictAddBool( &settings, TR_PREFS_KEY_RATIO_ENABLED, TRUE );
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break;
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case 954:
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tr_bencDictAddBool( &settings, TR_PREFS_KEY_RATIO_ENABLED, FALSE );
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break;
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default: showUsage( );
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break;
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}
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}
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if( foreground && !logfile )
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logfile = stderr;
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if( !loaded )
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{
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printMessage( logfile, TR_MSG_ERR, MY_NAME, "Error loading config file -- exiting.", __FILE__, __LINE__ );
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return -1;
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}
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if( dumpSettings )
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{
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char * str = tr_bencToStr( &settings, TR_FMT_JSON, NULL );
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fprintf( stderr, "%s", str );
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tr_free( str );
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return 0;
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}
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if( !foreground && tr_daemon( TRUE, FALSE ) < 0 )
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{
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char buf[256];
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tr_snprintf( buf, sizeof( buf ), "Failed to daemonize: %s", tr_strerror( errno ) );
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printMessage( logfile, TR_MSG_ERR, MY_NAME, buf, __FILE__, __LINE__ );
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exit( 1 );
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}
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/* start the session */
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mySession = tr_sessionInit( "daemon", configDir, TRUE, &settings );
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tr_ninf( NULL, "Using settings from \"%s\"", configDir );
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tr_sessionSaveSettings( mySession, configDir, &settings );
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if( tr_bencDictFindBool( &settings, TR_PREFS_KEY_RPC_AUTH_REQUIRED, &boolVal ) && boolVal )
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tr_ninf( MY_NAME, "requiring authentication" );
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/* maybe add a watchdir */
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{
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const char * dir;
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if( tr_bencDictFindBool( &settings, PREF_KEY_DIR_WATCH_ENABLED, &boolVal )
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&& boolVal
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&& tr_bencDictFindStr( &settings, PREF_KEY_DIR_WATCH, &dir )
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&& dir
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&& *dir )
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{
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tr_inf( "Watching \"%s\" for new .torrent files", dir );
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watchdir = dtr_watchdir_new( mySession, dir, onFileAdded );
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}
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}
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/* load the torrents */
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{
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tr_torrent ** torrents;
|
|
tr_ctor * ctor = tr_ctorNew( mySession );
|
|
if( paused )
|
|
tr_ctorSetPaused( ctor, TR_FORCE, TRUE );
|
|
torrents = tr_sessionLoadTorrents( mySession, ctor, NULL );
|
|
tr_free( torrents );
|
|
tr_ctorFree( ctor );
|
|
}
|
|
|
|
#ifdef HAVE_SYSLOG
|
|
if( !foreground )
|
|
openlog( MY_NAME, LOG_CONS, LOG_DAEMON );
|
|
#endif
|
|
|
|
while( !closing ) {
|
|
tr_wait_msec( 1000 ); /* sleep one second */
|
|
dtr_watchdir_update( watchdir );
|
|
pumpLogMessages( logfile );
|
|
}
|
|
|
|
/* shutdown */
|
|
#if HAVE_SYSLOG
|
|
if( !foreground )
|
|
{
|
|
syslog( LOG_INFO, "%s", "Closing session" );
|
|
closelog( );
|
|
}
|
|
#endif
|
|
|
|
printf( "Closing transmission session..." );
|
|
tr_sessionSaveSettings( mySession, configDir, &settings );
|
|
dtr_watchdir_free( watchdir );
|
|
tr_sessionClose( mySession );
|
|
printf( " done.\n" );
|
|
|
|
/* cleanup */
|
|
tr_bencFree( &settings );
|
|
return 0;
|
|
}
|