+/*
+ * This file is part of Disobedience
+ * Copyright (C) 2007 Richard Kettlewell
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+/** @file disobedience/rtp.c
+ * @brief RTP player support for Disobedience
+ */
+
+#include "disobedience.h"
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/un.h>
+
+/** @brief Path to RTP player's control socket */
+static char *rtp_socket;
+
+/** @brief Path to RTP player's logfile */
+static char *rtp_log;
+
+/** @brief Initialize @ref rtp_socket and @ref rtp_log if necessary */
+static void rtp_init(void) {
+ if(!rtp_socket) {
+ const char *home = getenv("HOME");
+ char *dir;
+
+ byte_xasprintf(&dir, "%s/.disorder", home);
+ mkdir(dir, 02700);
+ byte_xasprintf(&rtp_socket, "%s/rtp", dir);
+ byte_xasprintf(&rtp_log, "%s/rtp.log", dir);
+ }
+}
+
+/** @brief Return a connection to the RTP player's control socket */
+static FILE *rtp_connect(void) {
+ struct sockaddr_un un;
+ int fd;
+ FILE *fp;
+
+ rtp_init();
+ memset(&un, 0, sizeof un);
+ un.sun_family = AF_UNIX;
+ strcpy(un.sun_path, rtp_socket);
+ fd = xsocket(PF_UNIX, SOCK_STREAM, 0);
+ if(connect(fd, (const struct sockaddr *)&un, sizeof un) < 0) {
+ /* Connection refused just means that the player quit without deleting its
+ * socket */
+ switch(errno) {
+ case ECONNREFUSED:
+ case ENOENT:
+ break;
+ default:
+ /* Anything else may be a problem */
+ fpopup_msg(GTK_MESSAGE_ERROR, "connecting to %s: %s",
+ rtp_socket, strerror(errno));
+ break;
+ }
+ close(fd);
+ return 0;
+ }
+ if(!(fp = fdopen(fd, "r+"))) {
+ fpopup_msg(GTK_MESSAGE_ERROR, "error calling fdopen: %s", strerror(errno));
+ close(fd);
+ return 0;
+ }
+ return fp;
+}
+
+/** @brief Return non-0 iff the RTP player is running */
+int rtp_running(void) {
+ FILE *fp = rtp_connect();
+
+ if(!fp)
+ return 0; /* no connection -> not running */
+ fclose(fp); /* connection -> running */
+ return 1;
+}
+
+/** @brief Activate the RTP player if it is not running */
+void start_rtp(void) {
+ pid_t pid;
+ int w, fd;
+
+ if(rtp_running())
+ return; /* already running */
+ /* double-fork so we don't have to wait() later */
+ if(!(pid = xfork())) {
+ if(setsid() < 0)
+ fatal(errno, "error calling setsid");
+ if(!(pid = xfork())) {
+ /* grandchild */
+ exitfn = _exit;
+ /* log errors and output somewhere reasonably sane. rtp_running()
+ * will have made sure the directory exists. */
+ if((fd = open(rtp_log, O_WRONLY|O_CREAT|O_TRUNC, 0600)) < 0)
+ fatal(errno, "creating %s", rtp_log);
+ if(dup2(fd, 1) < 0
+ || dup2(fd, 2) < 0)
+ fatal(errno, "dup2");
+ if(close(fd) < 0)
+ fatal(errno, "close");
+ /* We don't want to hang onto whatever stdin was */
+ if((fd = open("/dev/null", O_RDONLY)) < 0)
+ fatal(errno, "opening /dev/null");
+ if(dup2(fd, 0) < 0)
+ fatal(errno, "dup2");
+ if(close(fd) < 0)
+ fatal(errno, "close");
+ /* execute the player */
+ execlp("disorder-playrtp",
+ "disorder-playrtp", "--socket", rtp_socket, (char *)0);
+ fatal(errno, "disorder-playrtp");
+ } else {
+ /* child */
+ _exit(0);
+ }
+ } else {
+ /* parent */
+ while(waitpid(pid, &w, 0) < 0 && errno == EINTR)
+ ;
+ }
+}
+
+/** @brief Stop the RTP player if it is running */
+void stop_rtp(void) {
+ FILE *fp = rtp_connect();
+
+ if(!fp)
+ return; /* already stopped */
+ fprintf(fp, "stop\n");
+ fclose(fp);
+}
+
+/*
+Local Variables:
+c-basic-offset:2
+comment-column:40
+fill-column:79
+indent-tabs-mode:nil
+End:
+*/
~mdw / disorder / commitdiff
