patch transmission for pidfile support

--- transmission-1.92.orig/daemon/daemon.c	2010-05-18 15:14:58.346494098 -0400
+++ transmission-1.92/daemon/daemon.c.1.92	2010-05-18 10:16:47.866492702 -0400
@@ -43,6 +43,7 @@
 static tr_bool paused = FALSE;
 static tr_bool closing = FALSE;
 static tr_session * mySession = NULL;
+char *PIDFILE;
 
 /***
 ****  Config File
@@ -98,6 +99,7 @@
     { 'r', "rpc-bind-address", "Where to listen for RPC connections", "r", 1, "<ipv4 address>" },
     { 953, "global-seedratio", "All torrents, unless overridden by a per-torrent setting, should seed until a specific ratio", "gsr", 1, "ratio" },
     { 954, "no-global-seedratio", "All torrents, unless overridden by a per-torrent setting, should seed regardless of ratio", "GSR", 0, NULL },
+    { 'x', "pid-file", "Set PID file ", "x", 1, "<pid-file>" },
     { 0, NULL, NULL, NULL, 0, NULL }
 };
 
@@ -389,6 +391,9 @@
 	    case 954:
 		      tr_bencDictAddBool( &settings, TR_PREFS_KEY_RATIO_ENABLED, FALSE );
 		      break;
+      case 'x':
+          PIDFILE = optarg;
+          break;
             default:  showUsage( );
                       break;
         }
@@ -424,6 +429,11 @@
     tr_ninf( NULL, "Using settings from \"%s\"", configDir );
     tr_sessionSaveSettings( mySession, configDir, &settings );
 
+    FILE *pid_file; 
+    pid_file=fopen(PIDFILE, "w"); 
+    fprintf (pid_file, "%d", getpid()); 
+    fclose (pid_file);
+
     if( tr_bencDictFindBool( &settings, TR_PREFS_KEY_RPC_AUTH_REQUIRED, &boolVal ) && boolVal )
         tr_ninf( MY_NAME, "requiring authentication" );