292 lines
9.6 KiB
C
292 lines
9.6 KiB
C
/*
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* This file Copyright (C) 2008 Charles Kerr <charles@rebelbase.com>
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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 <assert.h>
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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 <fcntl.h> /* open */
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#include <getopt.h>
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#include <signal.h>
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#include <unistd.h> /* daemon, getcwd */
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#include <libtransmission/transmission.h>
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#include <libtransmission/bencode.h>
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#include <libtransmission/rpc.h>
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#include <libtransmission/utils.h>
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#include <libtransmission/version.h>
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#define MY_NAME "transmission-daemon"
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static int closing = FALSE;
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static tr_handle * mySession;
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static char myConfigFilename[MAX_PATH_LENGTH];
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static void
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saveState( tr_handle * h )
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{
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tr_benc d;
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const char * str;
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tr_bencInitDict( &d, 12 );
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tr_bencDictAddStr( &d, "download-dir", tr_sessionGetDownloadDir( h ) );
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tr_bencDictAddInt( &d, "peer-limit", tr_sessionGetPeerLimit( h ) );
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tr_bencDictAddInt( &d, "pex-allowed", tr_sessionIsPexEnabled( h ) );
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tr_bencDictAddInt( &d, "port", tr_sessionGetPeerPort( h ) );
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tr_bencDictAddInt( &d, "port-forwarding-enabled",
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tr_sessionIsPortForwardingEnabled( h ) );
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tr_bencDictAddStr( &d, "rpc-acl", tr_sessionGetRPCACL( h ) );
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tr_bencDictAddInt( &d, "rpc-port", tr_sessionGetRPCPort( h ) );
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tr_bencDictAddInt( &d, "speed-limit-down",
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tr_sessionGetSpeedLimit( h, TR_DOWN ) );
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tr_bencDictAddInt( &d, "speed-limit-down-enabled",
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tr_sessionIsSpeedLimitEnabled( h, TR_DOWN ) );
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tr_bencDictAddInt( &d, "speed-limit-up",
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tr_sessionGetSpeedLimit( h, TR_UP ) );
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tr_bencDictAddInt( &d, "speed-limit-up-enabled",
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tr_sessionIsSpeedLimitEnabled( h, TR_UP ) );
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switch( tr_sessionGetEncryption( h ) ) {
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case TR_PLAINTEXT_PREFERRED: str = "tolerated"; break;
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case TR_ENCRYPTION_REQUIRED: str = "required"; break;
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default: str = "preferred"; break;
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}
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tr_bencDictAddStr( &d, "encryption", str );
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tr_ninf( MY_NAME, "saving \"%s\"", myConfigFilename );
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tr_bencSaveFile( myConfigFilename, &d );
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tr_bencFree( &d );
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}
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static void
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session_init( const char * configDir, int rpc_port, const char * rpc_acl )
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{
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tr_benc state;
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int have_state;
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int64_t peer_port = TR_DEFAULT_PORT;
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int64_t peers = TR_DEFAULT_GLOBAL_PEER_LIMIT;
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int64_t pex_enabled = TR_DEFAULT_PEX_ENABLED;
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int64_t fwd_enabled = TR_DEFAULT_PORT_FORWARDING_ENABLED;
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int64_t up_limit = 100;
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int64_t up_limited = FALSE;
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int64_t down_limit = 100;
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int64_t down_limited = FALSE;
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int encryption = TR_ENCRYPTION_PREFERRED;
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char downloadDir[MAX_PATH_LENGTH] = { '\0' };
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const char * rpc_acl_fallback = TR_DEFAULT_RPC_ACL;
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int64_t rpc_port_fallback = TR_DEFAULT_RPC_PORT;
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tr_ctor * ctor;
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tr_torrent ** torrents;
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if(( have_state = !tr_bencLoadFile( myConfigFilename, &state )))
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{
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const char * str;
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tr_ninf( MY_NAME, "loading settings from \"%s\"", myConfigFilename );
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if( tr_bencDictFindStr( &state, "download-dir", &str ) )
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tr_strlcpy( downloadDir, str, sizeof( downloadDir ) );
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tr_bencDictFindInt( &state, "peer-limit", &peers );
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tr_bencDictFindInt( &state, "pex-allowed", &pex_enabled );
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tr_bencDictFindInt( &state, "port", &peer_port );
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tr_bencDictFindInt( &state, "port-forwarding-enabled", &fwd_enabled );
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tr_bencDictFindStr( &state, "rpc-acl", &rpc_acl_fallback );
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tr_bencDictFindInt( &state, "rpc-port", &rpc_port_fallback );
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tr_bencDictFindInt( &state, "speed-limit-down", &down_limit );
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tr_bencDictFindInt( &state, "speed-limit-down-enabled", &down_limited );
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tr_bencDictFindInt( &state, "speed-limit-up", &up_limit );
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tr_bencDictFindInt( &state, "speed-limit-up-enabled", &up_limited );
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if( tr_bencDictFindStr( &state, "encryption", &str ) ) {
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if( !strcmp( str, "required" ) )
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encryption = TR_ENCRYPTION_REQUIRED;
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else if( !strcmp( str, "tolerated" ) )
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encryption = TR_PLAINTEXT_PREFERRED;
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}
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}
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/* fallbacks */
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if( !*downloadDir )
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getcwd( downloadDir, sizeof( downloadDir ) );
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if( rpc_port < 1 )
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rpc_port = rpc_port_fallback;
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if( !rpc_acl || !*rpc_acl )
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rpc_acl = rpc_acl_fallback;
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/* start the session */
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mySession = tr_sessionInitFull( configDir, "daemon", downloadDir,
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pex_enabled, fwd_enabled, peer_port,
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encryption,
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up_limit, up_limited,
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down_limit, down_limited,
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peers,
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TR_MSG_INF, 0,
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FALSE, /* is the blocklist enabled? */
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TR_DEFAULT_PEER_SOCKET_TOS,
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TRUE, rpc_port, rpc_acl );
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/* load the torrents */
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ctor = tr_ctorNew( mySession );
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torrents = tr_sessionLoadTorrents( mySession, ctor, NULL );
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tr_free( torrents );
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tr_ctorFree( ctor );
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if( have_state )
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tr_bencFree( &state );
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}
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static void
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daemonUsage( void )
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{
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puts( "usage: " MY_NAME " [-dfh] [-p file] [-s file]\n"
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"\n"
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"Transmission " LONG_VERSION_STRING " 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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" -a --acl <list> Access Control List. (Default: "TR_DEFAULT_RPC_ACL")\n"
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" -f --foreground Run in the foreground and log to stderr\n"
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" -g --config-dir <dir> Where to look for torrents and daemon-config.benc\n"
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" -h --help Display this message and exit\n"
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" -p --port n Port to listen to for requests (Default: "TR_DEFAULT_RPC_PORT_STR")\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 or Clutch.\n" );
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exit( 0 );
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}
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static void
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readargs( int argc, char ** argv,
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int * nofork, int * port, char ** acl,
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char ** configDir )
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{
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int opt;
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char optstr[] = "a:fg:hp:";
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struct option longopts[] = {
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{ "acl", required_argument, NULL, 'a' },
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{ "foreground", no_argument, NULL, 'f' },
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{ "config-dir", required_argument, NULL, 'g' },
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{ "help", no_argument, NULL, 'h' },
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{ "port", required_argument, NULL, 'p' },
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{ NULL, 0, NULL, '\0' }
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};
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while((( opt = getopt_long( argc, argv, optstr, longopts, NULL ))) != -1 ) {
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switch( opt ) {
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case 'a': *acl = tr_strdup( optarg ); break;
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case 'f': *nofork = 1; break;
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case 'g': *configDir = tr_strdup( optarg ); break;
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case 'p': *port = atoi( optarg ); break;
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default: daemonUsage( ); break;
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}
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}
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}
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static void
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gotsig( int sig UNUSED )
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{
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closing = TRUE;
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}
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#if !defined(HAVE_DAEMON)
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static int
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daemon( int nochdir, int noclose )
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{
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switch( fork( ) ) {
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case 0:
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break;
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case -1:
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tr_nerr( MY_NAME, "Error daemonizing (fork)! %d - %s", errno, strerror(errno) );
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return -1;
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default:
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_exit(0);
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}
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if( setsid() < 0 ) {
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tr_nerr( MY_NAME, "Error daemonizing (setsid)! %d - %s", errno, strerror(errno) );
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return -1;
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}
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switch( fork( ) ) {
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case 0:
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break;
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case -1:
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tr_nerr( MY_NAME, "Error daemonizing (fork2)! %d - %s", errno, strerror(errno) );
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return -1;
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default:
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_exit(0);
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}
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if( !nochdir && 0 > chdir( "/" ) ) {
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tr_nerr( MY_NAME, "Error daemonizing (chdir)! %d - %s", errno, strerror(errno) );
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return -1;
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}
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if( !noclose ) {
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int fd;
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if((( fd = open("/dev/null", O_RDONLY))) != 0 ) {
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dup2( fd, 0 );
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close( fd );
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}
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if((( fd = open("/dev/null", O_WRONLY))) != 1 ) {
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dup2( fd, 1 );
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close( fd );
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}
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if((( fd = open("/dev/null", O_WRONLY))) != 2 ) {
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dup2( fd, 2 );
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close( fd );
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}
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}
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return 0;
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}
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#endif
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int
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main( int argc, char ** argv )
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{
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int nofork = 0;
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int port = TR_DEFAULT_RPC_PORT;
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char * configDir = NULL;
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char * acl = NULL;
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signal( SIGINT, gotsig );
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signal( SIGQUIT, gotsig );
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signal( SIGTERM, gotsig );
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signal( SIGPIPE, SIG_IGN );
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signal( SIGHUP, SIG_IGN );
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readargs( argc, argv, &nofork, &port, &acl, &configDir );
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if( configDir == NULL )
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configDir = tr_strdup_printf( "%s-daemon", tr_getDefaultConfigDir() );
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tr_buildPath( myConfigFilename, sizeof( myConfigFilename ),
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configDir, "daemon-config.benc", NULL );
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if( !nofork ) {
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if( 0 > daemon( 1, 0 ) ) {
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fprintf( stderr, "failed to daemonize: %s\n", strerror( errno ) );
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exit( 1 );
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}
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}
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session_init( configDir, port, acl );
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while( !closing )
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sleep( 1 );
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saveState( mySession );
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printf( "Closing transmission session..." );
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tr_sessionClose( mySession );
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printf( " done.\n" );
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tr_free( configDir );
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return 0;
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}
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