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 static char *substitute_instance_name(void) {
38 const char *p
= config
->rtp_instance_name
;
44 ok
= (uname(&uts
) >= 0);
49 if(n
) { dynstr_append_bytes(&z
, p
, n
); p
+= n
; }
53 case '%': dynstr_append_bytes(&z
, "%", 1); p
++; break;
55 if(ok
) { dynstr_append_string(&z
, uts
.nodename
); p
++; }
56 else { p
++; if(*p
) p
++; }
58 default: dynstr_append_bytes(&z
, p
- 1, 2); p
++; break;
65 /** @brief Initialize @ref rtp_socket and @ref rtp_log if necessary */
66 static void rtp_init(void) {
68 const char *home
= getenv("HOME");
71 byte_xasprintf(&dir
, "%s/.disorder/", home
);
73 instance
= substitute_instance_name();
74 byte_xasprintf(&rtp_socket
, "%s%s", dir
, instance
);
75 byte_xasprintf(&rtp_log
, "%s%s.log", dir
, instance
);
79 /** @brief Return a connection to the RTP player's control socket */
80 static FILE *rtp_connect(void) {
81 struct sockaddr_un un
;
86 memset(&un
, 0, sizeof un
);
87 un
.sun_family
= AF_UNIX
;
88 strcpy(un
.sun_path
, rtp_socket
);
89 fd
= xsocket(PF_UNIX
, SOCK_STREAM
, 0);
90 if(connect(fd
, (const struct sockaddr
*)&un
, sizeof un
) < 0) {
91 /* Connection refused just means that the player quit without deleting its
98 /* Anything else may be a problem */
99 fpopup_msg(GTK_MESSAGE_ERROR
, "connecting to %s: %s",
100 rtp_socket
, strerror(errno
));
106 if(!(fp
= fdopen(fd
, "r+"))) {
107 fpopup_msg(GTK_MESSAGE_ERROR
, "error calling fdopen: %s", strerror(errno
));
114 /** @brief Return non-0 iff the RTP player is running */
115 int rtp_running(void) {
116 FILE *fp
= rtp_connect();
119 return 0; /* no connection -> not running */
120 fclose(fp
); /* connection -> running */
124 int rtp_getvol(int *l
, int *r
) {
128 fp
= rtp_connect(); if(!fp
) goto end
;
129 fprintf(fp
, "getvol\n"); fflush(fp
);
130 if(fscanf(fp
, "%d %d\n", l
, r
) != 2) goto end
;
137 int rtp_setvol(int *l
, int *r
) {
138 FILE *fp
= rtp_connect(); if(!fp
) return -1;
139 fprintf(fp
, "setvol %d %d\n", *l
, *r
); fflush(fp
);
140 if(fscanf(fp
, "%d %d\n", l
, r
) != 2) { /* do nothing */ }
145 /** @brief Activate the RTP player if it is not running */
146 void start_rtp(void) {
151 return; /* already running */
152 /* double-fork so we don't have to wait() later */
153 if(!(pid
= xfork())) {
155 disorder_fatal(errno
, "error calling setsid");
159 /* log errors and output somewhere reasonably sane. rtp_running()
160 * will have made sure the directory exists. */
161 if((fd
= open(rtp_log
, O_WRONLY
|O_CREAT
|O_TRUNC
, 0600)) < 0)
162 disorder_fatal(errno
, "creating %s", rtp_log
);
165 disorder_fatal(errno
, "dup2");
167 disorder_fatal(errno
, "close");
168 /* We don't want to hang onto whatever stdin was */
169 if((fd
= open("/dev/null", O_RDONLY
)) < 0)
170 disorder_fatal(errno
, "opening /dev/null");
172 disorder_fatal(errno
, "dup2");
174 disorder_fatal(errno
, "close");
175 /* execute the player */
176 execlp("disorder-playrtp",
178 "--socket", rtp_socket
,
181 disorder_fatal(errno
, "disorder-playrtp");
188 while(waitpid(pid
, &w
, 0) < 0 && errno
== EINTR
)
193 /** @brief Stop the RTP player if it is running */
194 void stop_rtp(void) {
195 FILE *fp
= rtp_connect();
198 return; /* already stopped */
199 fprintf(fp
, "stop\n");
203 static char *rtp_config_file(void) {
204 static char *rtp_config
;
205 const char *home
= getenv("HOME");
207 byte_xasprintf(&rtp_config
, "%s/.disorder/api", home
);
213 void load_rtp_config(void) {
214 char *rtp_config
= rtp_config_file();
216 if((fp
= fopen(rtp_config
, "r"))) {
218 if(inputline(rtp_config
, fp
, &line
, '\n') == 0) {
219 for(int n
= 0; uaudio_apis
[n
]; ++n
)
220 if(!strcmp(uaudio_apis
[n
]->name
, line
))
226 rtp_api
= uaudio_default(uaudio_apis
, UAUDIO_API_CLIENT
)->name
;
229 void save_rtp_config(void) {
231 char *rtp_config
= rtp_config_file();
233 byte_xasprintf(&tmp
, "%s.tmp", rtp_config
);
235 if(!(fp
= fopen(tmp
, "w"))){
236 fpopup_msg(GTK_MESSAGE_ERROR
, "error opening %s: %s",
237 tmp
, strerror(errno
));
240 if(fprintf(fp
, "%s\n", rtp_api
) < 0) {
241 fpopup_msg(GTK_MESSAGE_ERROR
, "error writing to %s: %s",
242 tmp
, strerror(errno
));
247 fpopup_msg(GTK_MESSAGE_ERROR
, "error closing %s: %s",
248 tmp
, strerror(errno
));
251 if(rename(tmp
, rtp_config
) < 0) {
252 fpopup_msg(GTK_MESSAGE_ERROR
, "error renaming %s: %s",
253 tmp
, strerror(errno
));
258 void change_rtp_api(const char *api
) {
259 if(rtp_api
&& !strcmp(api
, rtp_api
))
260 return; /* no change */
261 int running
= rtp_running();
266 // TODO this is racy and does not work; the player doesn't shut down quickly