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460b9539 | 1 | /* |
2 | * This file is part of DisOrder. | |
bcef8d6f | 3 | * Copyright (C) 2004-2012 Richard Kettlewell |
460b9539 | 4 | * |
e7eb3a27 | 5 | * This program is free software: you can redistribute it and/or modify |
460b9539 | 6 | * it under the terms of the GNU General Public License as published by |
e7eb3a27 | 7 | * the Free Software Foundation, either version 3 of the License, or |
460b9539 | 8 | * (at your option) any later version. |
9 | * | |
e7eb3a27 RK |
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. | |
14 | * | |
460b9539 | 15 | * You should have received a copy of the GNU General Public License |
e7eb3a27 | 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
460b9539 | 17 | */ |
132a5a4a RK |
18 | /** @file server/disorderd.c |
19 | * @brief Main DisOrder server | |
20 | */ | |
05b75f8d | 21 | #include "disorder-server.h" |
460b9539 | 22 | |
23 | static ev_source *ev; | |
24 | ||
460b9539 | 25 | static const struct option options[] = { |
26 | { "help", no_argument, 0, 'h' }, | |
27 | { "version", no_argument, 0, 'V' }, | |
28 | { "config", required_argument, 0, 'c' }, | |
29 | { "debug", no_argument, 0, 'd' }, | |
30 | { "foreground", no_argument, 0, 'f' }, | |
31 | { "log", required_argument, 0, 'l' }, | |
32 | { "pidfile", required_argument, 0, 'P' }, | |
18e6d6e6 | 33 | { "wide-open", no_argument, 0, 'w' }, |
bcef8d6f | 34 | { "wait-for-root", no_argument, 0, 'W' }, |
e83d0967 | 35 | { "syslog", no_argument, 0, 's' }, |
460b9539 | 36 | { 0, 0, 0, 0 } |
37 | }; | |
38 | ||
39 | /* display usage message and terminate */ | |
40 | static void help(void) { | |
41 | xprintf("Usage:\n" | |
42 | " disorderd [OPTIONS]\n" | |
43 | "Options:\n" | |
44 | " --help, -h Display usage message\n" | |
45 | " --version, -V Display version number\n" | |
46 | " --config PATH, -c PATH Set configuration file\n" | |
47 | " --debug, -d Turn on debugging\n" | |
48 | " --foreground, -f Do not become a daemon\n" | |
e83d0967 | 49 | " --syslog, -s Log to syslog even with -f\n" |
460b9539 | 50 | " --pidfile PATH, -P PATH Leave a pidfile\n"); |
51 | xfclose(stdout); | |
52 | exit(0); | |
53 | } | |
54 | ||
49a773eb RK |
55 | /* signals ------------------------------------------------------------------ */ |
56 | ||
460b9539 | 57 | /* SIGHUP callback */ |
58 | static int handle_sighup(ev_source attribute((unused)) *ev_, | |
59 | int attribute((unused)) sig, | |
60 | void attribute((unused)) *u) { | |
2e9ba080 | 61 | disorder_info("received SIGHUP"); |
37f29ce9 | 62 | reconfigure(ev, RECONFIGURE_RELOADING); |
460b9539 | 63 | return 0; |
64 | } | |
65 | ||
66 | /* fatal signals */ | |
67 | ||
68 | static int handle_sigint(ev_source attribute((unused)) *ev_, | |
69 | int attribute((unused)) sig, | |
70 | void attribute((unused)) *u) { | |
2e9ba080 | 71 | disorder_info("received SIGINT"); |
460b9539 | 72 | quit(ev); |
73 | } | |
74 | ||
75 | static int handle_sigterm(ev_source attribute((unused)) *ev_, | |
76 | int attribute((unused)) sig, | |
77 | void attribute((unused)) *u) { | |
2e9ba080 | 78 | disorder_info("received SIGTERM"); |
460b9539 | 79 | quit(ev); |
80 | } | |
81 | ||
49a773eb RK |
82 | /* periodic actions --------------------------------------------------------- */ |
83 | ||
2c6ee627 | 84 | /** @brief A job executed periodically by the server */ |
49a773eb | 85 | struct periodic_data { |
2c6ee627 | 86 | /** @brief Callback to process job */ |
49a773eb | 87 | void (*callback)(ev_source *); |
2c6ee627 RK |
88 | |
89 | /** @brief Period of job in seconds */ | |
49a773eb RK |
90 | int period; |
91 | }; | |
460b9539 | 92 | |
49a773eb RK |
93 | static int periodic_callback(ev_source *ev_, |
94 | const struct timeval attribute((unused)) *now, | |
95 | void *u) { | |
460b9539 | 96 | struct timeval w; |
49a773eb | 97 | struct periodic_data *const pd = u; |
460b9539 | 98 | |
49a773eb | 99 | pd->callback(ev_); |
460b9539 | 100 | gettimeofday(&w, 0); |
49a773eb RK |
101 | w.tv_sec += pd->period; |
102 | ev_timeout(ev, 0, &w, periodic_callback, pd); | |
460b9539 | 103 | return 0; |
104 | } | |
105 | ||
49a773eb | 106 | /** @brief Create a periodic action |
59cf25c4 | 107 | * @param ev_ Event loop |
49a773eb RK |
108 | * @param callback Callback function |
109 | * @param period Interval between calls in seconds | |
110 | * @param immediate If true, call @p callback straight away | |
111 | */ | |
112 | static void create_periodic(ev_source *ev_, | |
113 | void (*callback)(ev_source *), | |
114 | int period, | |
115 | int immediate) { | |
460b9539 | 116 | struct timeval w; |
49a773eb | 117 | struct periodic_data *const pd = xmalloc(sizeof *pd); |
460b9539 | 118 | |
49a773eb RK |
119 | pd->callback = callback; |
120 | pd->period = period; | |
121 | if(immediate) | |
122 | callback(ev_); | |
460b9539 | 123 | gettimeofday(&w, 0); |
49a773eb RK |
124 | w.tv_sec += period; |
125 | ev_timeout(ev_, 0, &w, periodic_callback, pd); | |
460b9539 | 126 | } |
127 | ||
49a773eb | 128 | static void periodic_rescan(ev_source *ev_) { |
dd9af5cb | 129 | trackdb_rescan(ev_, 1/*check*/, 0, 0); |
49a773eb RK |
130 | } |
131 | ||
132 | static void periodic_database_gc(ev_source attribute((unused)) *ev_) { | |
133 | trackdb_gc(); | |
134 | } | |
135 | ||
136 | static void periodic_volume_check(ev_source attribute((unused)) *ev_) { | |
460b9539 | 137 | int l, r; |
138 | char lb[32], rb[32]; | |
139 | ||
b50cfb8a RK |
140 | if(api && api->get_volume) { |
141 | api->get_volume(&l, &r); | |
460b9539 | 142 | if(l != volume_left || r != volume_right) { |
143 | volume_left = l; | |
144 | volume_right = r; | |
145 | snprintf(lb, sizeof lb, "%d", l); | |
146 | snprintf(rb, sizeof rb, "%d", r); | |
147 | eventlog("volume", lb, rb, (char *)0); | |
148 | } | |
149 | } | |
460b9539 | 150 | } |
151 | ||
49a773eb RK |
152 | static void periodic_play_check(ev_source *ev_) { |
153 | play(ev_); | |
154 | } | |
460b9539 | 155 | |
49a773eb RK |
156 | static void periodic_add_random(ev_source *ev_) { |
157 | add_random_track(ev_); | |
460b9539 | 158 | } |
159 | ||
e83d0967 RK |
160 | /* We fix the path to include the bindir and sbindir we were installed into */ |
161 | static void fix_path(void) { | |
162 | char *path = getenv("PATH"); | |
e99d42b1 | 163 | static char *newpath; |
164 | /* static or libgc collects it! */ | |
e83d0967 RK |
165 | |
166 | if(!path) | |
2e9ba080 | 167 | disorder_error(0, "PATH is not set at all!"); |
e83d0967 | 168 | |
31780899 | 169 | if(*finkbindir && strcmp(finkbindir, "/")) |
e83d0967 RK |
170 | /* We appear to be a finkized mac; include fink on the path in case the |
171 | * tools we need are there. */ | |
172 | byte_xasprintf(&newpath, "PATH=%s:%s:%s:%s", | |
173 | path, bindir, sbindir, finkbindir); | |
174 | else | |
175 | byte_xasprintf(&newpath, "PATH=%s:%s:%s", path, bindir, sbindir); | |
176 | putenv(newpath); | |
2e9ba080 | 177 | disorder_info("%s", newpath); |
e83d0967 RK |
178 | } |
179 | ||
bcef8d6f RK |
180 | /* Used by test scripts to wait for things to get ready */ |
181 | static void wait_for_root(void) { | |
182 | const char *password; | |
183 | ||
184 | while(!trackdb_readable()) { | |
185 | disorder_info("waiting for trackdb..."); | |
186 | sleep(1); | |
187 | } | |
188 | trackdb_init(TRACKDB_NO_RECOVER|TRACKDB_NO_UPGRADE); | |
189 | for(;;) { | |
190 | trackdb_open(TRACKDB_READ_ONLY); | |
191 | password = trackdb_get_password("root"); | |
192 | trackdb_close(); | |
193 | if(password) | |
194 | break; | |
195 | disorder_info("waiting for root user to be created..."); | |
196 | sleep(1); | |
197 | } | |
198 | trackdb_deinit(NULL); | |
199 | } | |
200 | ||
e83d0967 | 201 | int main(int argc, char **argv) { |
bcef8d6f | 202 | int n, background = 1, logsyslog = 0, wfr = 0; |
460b9539 | 203 | const char *pidfile = 0; |
31e2a93e | 204 | struct rlimit rl[1]; |
460b9539 | 205 | |
206 | set_progname(argv); | |
320598d4 | 207 | mem_init(); |
2e9ba080 RK |
208 | if(!setlocale(LC_CTYPE, "")) |
209 | disorder_fatal(errno, "error calling setlocale"); | |
460b9539 | 210 | /* garbage-collect PCRE's memory */ |
211 | pcre_malloc = xmalloc; | |
212 | pcre_free = xfree; | |
bcef8d6f | 213 | while((n = getopt_long(argc, argv, "hVc:dfP:NsW", options, 0)) >= 0) { |
460b9539 | 214 | switch(n) { |
215 | case 'h': help(); | |
3fbdc96d | 216 | case 'V': version("disorderd"); |
460b9539 | 217 | case 'c': configfile = optarg; break; |
218 | case 'd': debugging = 1; break; | |
219 | case 'f': background = 0; break; | |
220 | case 'P': pidfile = optarg; break; | |
e83d0967 | 221 | case 's': logsyslog = 1; break; |
18e6d6e6 | 222 | case 'w': wideopen = 1; break; |
bcef8d6f | 223 | case 'W': wfr = 1; break; |
2e9ba080 | 224 | default: disorder_fatal(0, "invalid option"); |
460b9539 | 225 | } |
226 | } | |
bcef8d6f RK |
227 | if(wfr) { |
228 | if(config_read(1, NULL)) | |
229 | disorder_fatal(0, "cannot read configuration"); | |
230 | wait_for_root(); | |
231 | return 0; | |
232 | } | |
460b9539 | 233 | /* go into background if necessary */ |
234 | if(background) | |
235 | daemonize(progname, LOG_DAEMON, pidfile); | |
e83d0967 RK |
236 | else if(logsyslog) { |
237 | /* If we're running under some kind of daemon supervisor then we may want | |
238 | * to log to syslog but not to go into background */ | |
239 | openlog(progname, LOG_PID, LOG_DAEMON); | |
240 | log_default = &log_syslog; | |
241 | } | |
2e9ba080 | 242 | disorder_info("process ID %lu", (unsigned long)getpid()); |
e83d0967 | 243 | fix_path(); |
4265e5d3 | 244 | srand(xtime(0)); /* don't start the same every time */ |
b12be54a | 245 | /* gcrypt initialization */ |
5bf7c546 RK |
246 | if(!gcry_check_version(NULL)) |
247 | disorder_fatal(0, "gcry_check_version failed"); | |
b12be54a | 248 | gcry_control(GCRYCTL_INIT_SECMEM, 1); |
5bf7c546 | 249 | gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0); |
31e2a93e RK |
250 | /* make sure we can't have more than FD_SETSIZE files open (event.c does |
251 | * check but this provides an additional line of defence) */ | |
252 | if(getrlimit(RLIMIT_NOFILE, rl) < 0) | |
2e9ba080 | 253 | disorder_fatal(errno, "getrlimit RLIMIT_NOFILE"); |
31e2a93e RK |
254 | if(rl->rlim_cur > FD_SETSIZE) { |
255 | rl->rlim_cur = FD_SETSIZE; | |
256 | if(setrlimit(RLIMIT_NOFILE, rl) < 0) | |
2e9ba080 RK |
257 | disorder_fatal(errno, "setrlimit to reduce RLIMIT_NOFILE to %lu", |
258 | (unsigned long)rl->rlim_cur); | |
259 | disorder_info("set RLIM_NOFILE to %lu", (unsigned long)rl->rlim_cur); | |
31e2a93e | 260 | } else |
2e9ba080 | 261 | disorder_info("RLIM_NOFILE is %lu", (unsigned long)rl->rlim_cur); |
460b9539 | 262 | /* create event loop */ |
263 | ev = ev_new(); | |
2e9ba080 | 264 | if(ev_child_setup(ev)) disorder_fatal(0, "ev_child_setup failed"); |
460b9539 | 265 | /* read config */ |
b50cfb8a | 266 | config_uaudio_apis = uaudio_apis; |
02ba7921 | 267 | if(config_read(1, NULL)) |
2e9ba080 | 268 | disorder_fatal(0, "cannot read configuration"); |
659d87e8 RK |
269 | /* make sure the home directory exists and has suitable permissions */ |
270 | make_home(); | |
460b9539 | 271 | /* Start the speaker process (as root! - so it can choose its nice value) */ |
272 | speaker_setup(ev); | |
273 | /* set server nice value _after_ starting the speaker, so that they | |
274 | * are independently niceable */ | |
275 | xnice(config->nice_server); | |
276 | /* change user */ | |
277 | become_mortal(); | |
278 | /* make sure we're not root, whatever the config says */ | |
2e9ba080 RK |
279 | if(getuid() == 0 || geteuid() == 0) |
280 | disorder_fatal(0, "do not run as root"); | |
460b9539 | 281 | /* open a lockfile - we only want one copy of the server to run at once. */ |
b4a8d0ff | 282 | if(1) { |
460b9539 | 283 | const char *lockfile; |
284 | int lockfd; | |
9ba0617a RK |
285 | struct flock lock; |
286 | ||
460b9539 | 287 | lockfile = config_get_file("lock"); |
288 | if((lockfd = open(lockfile, O_RDWR|O_CREAT, 0600)) < 0) | |
2e9ba080 | 289 | disorder_fatal(errno, "error opening %s", lockfile); |
460b9539 | 290 | cloexec(lockfd); |
291 | memset(&lock, 0, sizeof lock); | |
292 | lock.l_type = F_WRLCK; | |
293 | lock.l_whence = SEEK_SET; | |
294 | if(fcntl(lockfd, F_SETLK, &lock) < 0) | |
2e9ba080 | 295 | disorder_fatal(errno, "error locking %s", lockfile); |
460b9539 | 296 | } |
297 | /* initialize database environment */ | |
a745dd43 | 298 | trackdb_init(TRACKDB_NORMAL_RECOVER|TRACKDB_MAY_CREATE); |
460b9539 | 299 | trackdb_master(ev); |
37f29ce9 RK |
300 | /* install new config; don't create socket */ |
301 | if(reconfigure(ev, RECONFIGURE_FIRST)) | |
2e9ba080 | 302 | disorder_fatal(0, "failed to read configuration"); |
36c5e137 RK |
303 | /* Open the database */ |
304 | trackdb_open(TRACKDB_CAN_UPGRADE); | |
305 | /* load the queue and recently-played list */ | |
306 | queue_read(); | |
307 | recent_read(); | |
308 | /* Arrange timeouts for schedule actions */ | |
309 | schedule_init(ev); | |
f0feb22e RK |
310 | /* create a root login */ |
311 | trackdb_create_root(); | |
37f29ce9 RK |
312 | /* create sockets */ |
313 | reset_sockets(ev); | |
74f77840 RK |
314 | /* check for change to database parameters */ |
315 | dbparams_check(); | |
460b9539 | 316 | /* re-read config if we receive a SIGHUP */ |
2e9ba080 RK |
317 | if(ev_signal(ev, SIGHUP, handle_sighup, 0)) |
318 | disorder_fatal(0, "ev_signal failed"); | |
460b9539 | 319 | /* exit on SIGINT/SIGTERM */ |
2e9ba080 RK |
320 | if(ev_signal(ev, SIGINT, handle_sigint, 0)) |
321 | disorder_fatal(0, "ev_signal failed"); | |
322 | if(ev_signal(ev, SIGTERM, handle_sigterm, 0)) | |
323 | disorder_fatal(0, "ev_signal failed"); | |
460b9539 | 324 | /* ignore SIGPIPE */ |
325 | signal(SIGPIPE, SIG_IGN); | |
49a773eb RK |
326 | /* Rescan immediately and then daily */ |
327 | create_periodic(ev, periodic_rescan, 86400, 1/*immediate*/); | |
328 | /* Tidy up the database once a minute */ | |
329 | create_periodic(ev, periodic_database_gc, 60, 0); | |
330 | /* Check the volume immediately and then once a minute */ | |
331 | create_periodic(ev, periodic_volume_check, 60, 1); | |
332 | /* Check for a playable track once a second */ | |
333 | create_periodic(ev, periodic_play_check, 1, 0); | |
1ef295b3 RK |
334 | /* Try adding a random track immediately and once every two seconds */ |
335 | create_periodic(ev, periodic_add_random, 2, 1); | |
18f94073 RK |
336 | /* Issue a rescan when devices are mounted or unmouted */ |
337 | create_periodic(ev, periodic_mount_check, MOUNT_CHECK_INTERVAL, 1); | |
460b9539 | 338 | /* enter the event loop */ |
339 | n = ev_run(ev); | |
340 | /* if we exit the event loop, something must have gone wrong */ | |
2e9ba080 | 341 | disorder_fatal(errno, "ev_run returned %d", n); |
460b9539 | 342 | } |
343 | ||
344 | /* | |
345 | Local Variables: | |
346 | c-basic-offset:2 | |
347 | comment-column:40 | |
e83d0967 | 348 | fill-column:79 |
460b9539 | 349 | End: |
350 | */ |