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