2 * This file is part of Disobedience
3 * Copyright (C) 2007-2010 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 disorder_fatal(errno
, "error calling setsid");
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 disorder_fatal(errno
, "creating %s", rtp_log
);
120 disorder_fatal(errno
, "dup2");
122 disorder_fatal(errno
, "close");
123 /* We don't want to hang onto whatever stdin was */
124 if((fd
= open("/dev/null", O_RDONLY
)) < 0)
125 disorder_fatal(errno
, "opening /dev/null");
127 disorder_fatal(errno
, "dup2");
129 disorder_fatal(errno
, "close");
130 /* execute the player */
131 execlp("disorder-playrtp",
133 "--socket", rtp_socket
,
136 disorder_fatal(errno
, "disorder-playrtp");
143 while(waitpid(pid
, &w
, 0) < 0 && errno
== EINTR
)
148 /** @brief Stop the RTP player if it is running */
149 void stop_rtp(void) {
150 FILE *fp
= rtp_connect();
153 return; /* already stopped */
154 fprintf(fp
, "stop\n");
158 static char *rtp_config_file(void) {
159 static char *rtp_config
;
160 const char *home
= getenv("HOME");
162 byte_xasprintf(&rtp_config
, "%s/.disorder/api", home
);
168 void load_rtp_config(void) {
169 char *rtp_config
= rtp_config_file();
171 if((fp
= fopen(rtp_config
, "r"))) {
173 if(inputline(rtp_config
, fp
, &line
, '\n') == 0) {
174 for(int n
= 0; uaudio_apis
[n
]; ++n
)
175 if(!strcmp(uaudio_apis
[n
]->name
, line
))
181 rtp_api
= uaudio_default(uaudio_apis
, UAUDIO_API_CLIENT
)->name
;
184 void save_rtp_config(void) {
186 char *rtp_config
= rtp_config_file();
188 byte_xasprintf(&tmp
, "%s.tmp", rtp_config
);
190 if(!(fp
= fopen(tmp
, "w"))){
191 fpopup_msg(GTK_MESSAGE_ERROR
, "error opening %s: %s",
192 tmp
, strerror(errno
));
195 if(fprintf(fp
, "%s\n", rtp_api
) < 0) {
196 fpopup_msg(GTK_MESSAGE_ERROR
, "error writing to %s: %s",
197 tmp
, strerror(errno
));
202 fpopup_msg(GTK_MESSAGE_ERROR
, "error closing %s: %s",
203 tmp
, strerror(errno
));
206 if(rename(tmp
, rtp_config
) < 0) {
207 fpopup_msg(GTK_MESSAGE_ERROR
, "error renaming %s: %s",
208 tmp
, strerror(errno
));
213 void change_rtp_api(const char *api
) {
214 if(rtp_api
&& !strcmp(api
, rtp_api
))
215 return; /* no change */
216 int running
= rtp_running();
221 // TODO this is racy and does not work; the player doesn't shut down quickly