2 * This file is part of Disobedience
3 * Copyright (C) 2007 Richard Kettlewell
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 /** @file disobedience/rtp.c
19 * @brief RTP player support for Disobedience
22 #include "disobedience.h"
23 #include <sys/types.h>
28 #include <sys/utsname.h>
31 /** @brief Path to RTP player's control socket */
32 static char *rtp_socket;
34 /** @brief Path to RTP player's logfile */
37 /** @brief Initialize @ref rtp_socket and @ref rtp_log if necessary */
38 static void rtp_init(void) {
40 const char *home = getenv("HOME");
44 byte_xasprintf(&dir, "%s/.disorder/", home);
47 byte_xasprintf(&base, "%s/", dir);
49 byte_xasprintf(&base, "%s/%s-", dir, uts.nodename);
50 byte_xasprintf(&rtp_socket, "%srtp", base);
51 byte_xasprintf(&rtp_log, "%srtp.log", base);
55 /** @brief Return a connection to the RTP player's control socket */
56 static FILE *rtp_connect(void) {
57 struct sockaddr_un un;
62 memset(&un, 0, sizeof un);
63 un.sun_family = AF_UNIX;
64 strcpy(un.sun_path, rtp_socket);
65 fd = xsocket(PF_UNIX, SOCK_STREAM, 0);
66 if(connect(fd, (const struct sockaddr *)&un, sizeof un) < 0) {
67 /* Connection refused just means that the player quit without deleting its
74 /* Anything else may be a problem */
75 fpopup_msg(GTK_MESSAGE_ERROR, "connecting to %s: %s",
76 rtp_socket, strerror(errno));
82 if(!(fp = fdopen(fd, "r+"))) {
83 fpopup_msg(GTK_MESSAGE_ERROR, "error calling fdopen: %s", strerror(errno));
90 /** @brief Return non-0 iff the RTP player is running */
91 int rtp_running(void) {
92 FILE *fp = rtp_connect();
95 return 0; /* no connection -> not running */
96 fclose(fp); /* connection -> running */
100 /** @brief Activate the RTP player if it is not running */
101 void start_rtp(void) {
106 return; /* already running */
107 /* double-fork so we don't have to wait() later */
108 if(!(pid = xfork())) {
110 fatal(errno, "error calling setsid");
111 if(!(pid = xfork())) {
114 /* log errors and output somewhere reasonably sane. rtp_running()
115 * will have made sure the directory exists. */
116 if((fd = open(rtp_log, O_WRONLY|O_CREAT|O_TRUNC, 0600)) < 0)
117 fatal(errno, "creating %s", rtp_log);
120 fatal(errno, "dup2");
122 fatal(errno, "close");
123 /* We don't want to hang onto whatever stdin was */
124 if((fd = open("/dev/null", O_RDONLY)) < 0)
125 fatal(errno, "opening /dev/null");
127 fatal(errno, "dup2");
129 fatal(errno, "close");
130 /* execute the player */
131 execlp("disorder-playrtp",
132 "disorder-playrtp", "--socket", rtp_socket, (char *)0);
133 fatal(errno, "disorder-playrtp");
140 while(waitpid(pid, &w, 0) < 0 && errno == EINTR)
145 /** @brief Stop the RTP player if it is running */
146 void stop_rtp(void) {
147 FILE *fp = rtp_connect();
150 return; /* already stopped */
151 fprintf(fp, "stop\n");