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Remove arch tags throughout
[disorder] / server / disorderd.c
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460b9539 1/*
2 * This file is part of DisOrder.
3 * Copyright (C) 2004, 2005, 2006 Richard Kettlewell
4 *
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 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
18 * USA
19 */
20
21#include <config.h>
22
23#include <stdio.h>
24#include <getopt.h>
25#include <pwd.h>
26#include <grp.h>
27#include <sys/types.h>
28#include <errno.h>
29#include <stdlib.h>
30#include <string.h>
31#include <unistd.h>
32#include <signal.h>
33#include <sys/socket.h>
34#include <time.h>
35#include <locale.h>
36#include <syslog.h>
37#include <sys/time.h>
38#include <pcre.h>
39#include <fcntl.h>
40
41#include "daemonize.h"
42#include "event.h"
43#include "log.h"
44#include "configuration.h"
45#include "trackdb.h"
46#include "queue.h"
47#include "mem.h"
48#include "play.h"
49#include "server.h"
50#include "state.h"
51#include "syscalls.h"
52#include "defs.h"
53#include "user.h"
54#include "mixer.h"
55#include "eventlog.h"
56
57static ev_source *ev;
58
59static void rescan_after(long offset);
60static void dbgc_after(long offset);
61static void volumecheck_after(long offset);
62
63static const struct option options[] = {
64 { "help", no_argument, 0, 'h' },
65 { "version", no_argument, 0, 'V' },
66 { "config", required_argument, 0, 'c' },
67 { "debug", no_argument, 0, 'd' },
68 { "foreground", no_argument, 0, 'f' },
69 { "log", required_argument, 0, 'l' },
70 { "pidfile", required_argument, 0, 'P' },
71 { "no-initial-rescan", no_argument, 0, 'N' },
72 { 0, 0, 0, 0 }
73};
74
75/* display usage message and terminate */
76static void help(void) {
77 xprintf("Usage:\n"
78 " disorderd [OPTIONS]\n"
79 "Options:\n"
80 " --help, -h Display usage message\n"
81 " --version, -V Display version number\n"
82 " --config PATH, -c PATH Set configuration file\n"
83 " --debug, -d Turn on debugging\n"
84 " --foreground, -f Do not become a daemon\n"
85 " --pidfile PATH, -P PATH Leave a pidfile\n");
86 xfclose(stdout);
87 exit(0);
88}
89
90/* display version number and terminate */
91static void version(void) {
92 xprintf("disorderd version %s\n", disorder_version_string);
93 xfclose(stdout);
94 exit(0);
95}
96
97/* SIGHUP callback */
98static int handle_sighup(ev_source attribute((unused)) *ev_,
99 int attribute((unused)) sig,
100 void attribute((unused)) *u) {
101 info("received SIGHUP");
102 reconfigure(ev, 1);
103 return 0;
104}
105
106/* fatal signals */
107
108static int handle_sigint(ev_source attribute((unused)) *ev_,
109 int attribute((unused)) sig,
110 void attribute((unused)) *u) {
111 info("received SIGINT");
112 quit(ev);
113}
114
115static int handle_sigterm(ev_source attribute((unused)) *ev_,
116 int attribute((unused)) sig,
117 void attribute((unused)) *u) {
118 info("received SIGTERM");
119 quit(ev);
120}
121
122static int rescan_again(ev_source *ev_,
123 const struct timeval attribute((unused)) *now,
124 void attribute((unused)) *u) {
125 trackdb_rescan(ev_);
126 rescan_after(86400);
127 return 0;
128}
129
130static void rescan_after(long offset) {
131 struct timeval w;
132
133 gettimeofday(&w, 0);
134 w.tv_sec += offset;
135 ev_timeout(ev, 0, &w, rescan_again, 0);
136}
137
138static int dbgc_again(ev_source attribute((unused)) *ev_,
139 const struct timeval attribute((unused)) *now,
140 void attribute((unused)) *u) {
141 trackdb_gc();
142 dbgc_after(60);
143 return 0;
144}
145
146static void dbgc_after(long offset) {
147 struct timeval w;
148
149 gettimeofday(&w, 0);
150 w.tv_sec += offset;
151 ev_timeout(ev, 0, &w, dbgc_again, 0);
152}
153
154static int volumecheck_again(ev_source attribute((unused)) *ev_,
155 const struct timeval attribute((unused)) *now,
156 void attribute((unused)) *u) {
157 int l, r;
158 char lb[32], rb[32];
159
160 if(!mixer_control(&l, &r, 0)) {
161 if(l != volume_left || r != volume_right) {
162 volume_left = l;
163 volume_right = r;
164 snprintf(lb, sizeof lb, "%d", l);
165 snprintf(rb, sizeof rb, "%d", r);
166 eventlog("volume", lb, rb, (char *)0);
167 }
168 }
169 volumecheck_after(60);
170 return 0;
171}
172
173static void volumecheck_after(long offset) {
174 struct timeval w;
175
176 gettimeofday(&w, 0);
177 w.tv_sec += offset;
178 ev_timeout(ev, 0, &w, volumecheck_again, 0);
179}
180
181 int main(int argc, char **argv) {
182 int n, background = 1;
183 const char *pidfile = 0;
184 int initial_rescan = 1;
185
186 set_progname(argv);
187 mem_init(1);
188 if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale");
189 /* garbage-collect PCRE's memory */
190 pcre_malloc = xmalloc;
191 pcre_free = xfree;
192 while((n = getopt_long(argc, argv, "hVc:dfP:N", options, 0)) >= 0) {
193 switch(n) {
194 case 'h': help();
195 case 'V': version();
196 case 'c': configfile = optarg; break;
197 case 'd': debugging = 1; break;
198 case 'f': background = 0; break;
199 case 'P': pidfile = optarg; break;
200 case 'N': initial_rescan = 0; break;
201 default: fatal(0, "invalid option");
202 }
203 }
204 /* go into background if necessary */
205 if(background)
206 daemonize(progname, LOG_DAEMON, pidfile);
207 info("process ID %lu", (unsigned long)getpid());
208 srand(time(0)); /* don't start the same every time */
209 /* create event loop */
210 ev = ev_new();
211 if(ev_child_setup(ev)) fatal(0, "ev_child_setup failed");
212 /* read config */
213 if(config_read())
214 fatal(0, "cannot read configuration");
215 /* Start the speaker process (as root! - so it can choose its nice value) */
216 speaker_setup(ev);
217 /* set server nice value _after_ starting the speaker, so that they
218 * are independently niceable */
219 xnice(config->nice_server);
220 /* change user */
221 become_mortal();
222 /* make sure we're not root, whatever the config says */
223 if(getuid() == 0 || geteuid() == 0) fatal(0, "do not run as root");
224 /* open a lockfile - we only want one copy of the server to run at once. */
225 if(config->lock) {
226 const char *lockfile;
227 int lockfd;
228 struct flock lock;
229
230 lockfile = config_get_file("lock");
231 if((lockfd = open(lockfile, O_RDWR|O_CREAT, 0600)) < 0)
232 fatal(errno, "error opening %s", lockfile);
233 cloexec(lockfd);
234 memset(&lock, 0, sizeof lock);
235 lock.l_type = F_WRLCK;
236 lock.l_whence = SEEK_SET;
237 if(fcntl(lockfd, F_SETLK, &lock) < 0)
238 fatal(errno, "error locking %s", lockfile);
239 }
240 /* initialize database environment */
241 trackdb_init(TRACKDB_NORMAL_RECOVER);
242 trackdb_master(ev);
243 /* install new config */
244 reconfigure(ev, 0);
245 /* re-read config if we receive a SIGHUP */
246 if(ev_signal(ev, SIGHUP, handle_sighup, 0)) fatal(0, "ev_signal failed");
247 /* exit on SIGINT/SIGTERM */
248 if(ev_signal(ev, SIGINT, handle_sigint, 0)) fatal(0, "ev_signal failed");
249 if(ev_signal(ev, SIGTERM, handle_sigterm, 0)) fatal(0, "ev_signal failed");
250 /* ignore SIGPIPE */
251 signal(SIGPIPE, SIG_IGN);
252 /* start a rescan straight away */
253 if(initial_rescan)
254 trackdb_rescan(ev);
255 rescan_after(86400);
256 /* periodically tidy up the database */
257 dbgc_after(60);
258 /* periodically check the volume */
259 volumecheck_after(60);
260 /* set initial state */
261 add_random_track();
262 play(ev);
263 /* enter the event loop */
264 n = ev_run(ev);
265 /* if we exit the event loop, something must have gone wrong */
266 fatal(errno, "ev_run returned %d", n);
267}
268
269/*
270Local Variables:
271c-basic-offset:2
272comment-column:40
273End:
274*/