| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2004-2009 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 3 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, |
| 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 | * |
| 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/>. |
| 17 | */ |
| 18 | /** @file server/disorderd.c |
| 19 | * @brief Main DisOrder server |
| 20 | */ |
| 21 | #include "disorder-server.h" |
| 22 | |
| 23 | static ev_source *ev; |
| 24 | |
| 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' }, |
| 33 | { "wide-open", no_argument, 0, 'w' }, |
| 34 | { "syslog", no_argument, 0, 's' }, |
| 35 | { 0, 0, 0, 0 } |
| 36 | }; |
| 37 | |
| 38 | /* display usage message and terminate */ |
| 39 | static void help(void) { |
| 40 | xprintf("Usage:\n" |
| 41 | " disorderd [OPTIONS]\n" |
| 42 | "Options:\n" |
| 43 | " --help, -h Display usage message\n" |
| 44 | " --version, -V Display version number\n" |
| 45 | " --config PATH, -c PATH Set configuration file\n" |
| 46 | " --debug, -d Turn on debugging\n" |
| 47 | " --foreground, -f Do not become a daemon\n" |
| 48 | " --syslog, -s Log to syslog even with -f\n" |
| 49 | " --pidfile PATH, -P PATH Leave a pidfile\n"); |
| 50 | xfclose(stdout); |
| 51 | exit(0); |
| 52 | } |
| 53 | |
| 54 | /* signals ------------------------------------------------------------------ */ |
| 55 | |
| 56 | /* SIGHUP callback */ |
| 57 | static int handle_sighup(ev_source attribute((unused)) *ev_, |
| 58 | int attribute((unused)) sig, |
| 59 | void attribute((unused)) *u) { |
| 60 | info("received SIGHUP"); |
| 61 | reconfigure(ev, RECONFIGURE_RELOADING); |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | /* fatal signals */ |
| 66 | |
| 67 | static int handle_sigint(ev_source attribute((unused)) *ev_, |
| 68 | int attribute((unused)) sig, |
| 69 | void attribute((unused)) *u) { |
| 70 | info("received SIGINT"); |
| 71 | quit(ev); |
| 72 | } |
| 73 | |
| 74 | static int handle_sigterm(ev_source attribute((unused)) *ev_, |
| 75 | int attribute((unused)) sig, |
| 76 | void attribute((unused)) *u) { |
| 77 | info("received SIGTERM"); |
| 78 | quit(ev); |
| 79 | } |
| 80 | |
| 81 | /* periodic actions --------------------------------------------------------- */ |
| 82 | |
| 83 | struct periodic_data { |
| 84 | void (*callback)(ev_source *); |
| 85 | int period; |
| 86 | }; |
| 87 | |
| 88 | static int periodic_callback(ev_source *ev_, |
| 89 | const struct timeval attribute((unused)) *now, |
| 90 | void *u) { |
| 91 | struct timeval w; |
| 92 | struct periodic_data *const pd = u; |
| 93 | |
| 94 | pd->callback(ev_); |
| 95 | gettimeofday(&w, 0); |
| 96 | w.tv_sec += pd->period; |
| 97 | ev_timeout(ev, 0, &w, periodic_callback, pd); |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | /** @brief Create a periodic action |
| 102 | * @param ev_ Event loop |
| 103 | * @param callback Callback function |
| 104 | * @param period Interval between calls in seconds |
| 105 | * @param immediate If true, call @p callback straight away |
| 106 | */ |
| 107 | static void create_periodic(ev_source *ev_, |
| 108 | void (*callback)(ev_source *), |
| 109 | int period, |
| 110 | int immediate) { |
| 111 | struct timeval w; |
| 112 | struct periodic_data *const pd = xmalloc(sizeof *pd); |
| 113 | |
| 114 | pd->callback = callback; |
| 115 | pd->period = period; |
| 116 | if(immediate) |
| 117 | callback(ev_); |
| 118 | gettimeofday(&w, 0); |
| 119 | w.tv_sec += period; |
| 120 | ev_timeout(ev_, 0, &w, periodic_callback, pd); |
| 121 | } |
| 122 | |
| 123 | static void periodic_rescan(ev_source *ev_) { |
| 124 | trackdb_rescan(ev_, 1/*check*/, 0, 0); |
| 125 | } |
| 126 | |
| 127 | static void periodic_database_gc(ev_source attribute((unused)) *ev_) { |
| 128 | trackdb_gc(); |
| 129 | } |
| 130 | |
| 131 | static void periodic_volume_check(ev_source attribute((unused)) *ev_) { |
| 132 | int l, r; |
| 133 | char lb[32], rb[32]; |
| 134 | |
| 135 | if(api && api->get_volume) { |
| 136 | api->get_volume(&l, &r); |
| 137 | if(l != volume_left || r != volume_right) { |
| 138 | volume_left = l; |
| 139 | volume_right = r; |
| 140 | snprintf(lb, sizeof lb, "%d", l); |
| 141 | snprintf(rb, sizeof rb, "%d", r); |
| 142 | eventlog("volume", lb, rb, (char *)0); |
| 143 | } |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | static void periodic_play_check(ev_source *ev_) { |
| 148 | play(ev_); |
| 149 | } |
| 150 | |
| 151 | static void periodic_add_random(ev_source *ev_) { |
| 152 | add_random_track(ev_); |
| 153 | } |
| 154 | |
| 155 | /* We fix the path to include the bindir and sbindir we were installed into */ |
| 156 | static void fix_path(void) { |
| 157 | char *path = getenv("PATH"); |
| 158 | static char *newpath; |
| 159 | /* static or libgc collects it! */ |
| 160 | |
| 161 | if(!path) |
| 162 | error(0, "PATH is not set at all!"); |
| 163 | |
| 164 | if(*finkbindir && strcmp(finkbindir, "/")) |
| 165 | /* We appear to be a finkized mac; include fink on the path in case the |
| 166 | * tools we need are there. */ |
| 167 | byte_xasprintf(&newpath, "PATH=%s:%s:%s:%s", |
| 168 | path, bindir, sbindir, finkbindir); |
| 169 | else |
| 170 | byte_xasprintf(&newpath, "PATH=%s:%s:%s", path, bindir, sbindir); |
| 171 | putenv(newpath); |
| 172 | info("%s", newpath); |
| 173 | } |
| 174 | |
| 175 | int main(int argc, char **argv) { |
| 176 | int n, background = 1, logsyslog = 0; |
| 177 | const char *pidfile = 0; |
| 178 | struct rlimit rl[1]; |
| 179 | |
| 180 | set_progname(argv); |
| 181 | mem_init(); |
| 182 | if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale"); |
| 183 | /* garbage-collect PCRE's memory */ |
| 184 | pcre_malloc = xmalloc; |
| 185 | pcre_free = xfree; |
| 186 | while((n = getopt_long(argc, argv, "hVc:dfP:Ns", options, 0)) >= 0) { |
| 187 | switch(n) { |
| 188 | case 'h': help(); |
| 189 | case 'V': version("disorderd"); |
| 190 | case 'c': configfile = optarg; break; |
| 191 | case 'd': debugging = 1; break; |
| 192 | case 'f': background = 0; break; |
| 193 | case 'P': pidfile = optarg; break; |
| 194 | case 's': logsyslog = 1; break; |
| 195 | case 'w': wideopen = 1; break; |
| 196 | default: fatal(0, "invalid option"); |
| 197 | } |
| 198 | } |
| 199 | /* go into background if necessary */ |
| 200 | if(background) |
| 201 | daemonize(progname, LOG_DAEMON, pidfile); |
| 202 | else if(logsyslog) { |
| 203 | /* If we're running under some kind of daemon supervisor then we may want |
| 204 | * to log to syslog but not to go into background */ |
| 205 | openlog(progname, LOG_PID, LOG_DAEMON); |
| 206 | log_default = &log_syslog; |
| 207 | } |
| 208 | info("process ID %lu", (unsigned long)getpid()); |
| 209 | fix_path(); |
| 210 | srand(xtime(0)); /* don't start the same every time */ |
| 211 | /* gcrypt initialization */ |
| 212 | if(!gcry_check_version(NULL)) |
| 213 | disorder_fatal(0, "gcry_check_version failed"); |
| 214 | gcry_control(GCRYCTL_INIT_SECMEM, 1); |
| 215 | gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0); |
| 216 | /* make sure we can't have more than FD_SETSIZE files open (event.c does |
| 217 | * check but this provides an additional line of defence) */ |
| 218 | if(getrlimit(RLIMIT_NOFILE, rl) < 0) |
| 219 | fatal(errno, "getrlimit RLIMIT_NOFILE"); |
| 220 | if(rl->rlim_cur > FD_SETSIZE) { |
| 221 | rl->rlim_cur = FD_SETSIZE; |
| 222 | if(setrlimit(RLIMIT_NOFILE, rl) < 0) |
| 223 | fatal(errno, "setrlimit to reduce RLIMIT_NOFILE to %lu", |
| 224 | (unsigned long)rl->rlim_cur); |
| 225 | info("set RLIM_NOFILE to %lu", (unsigned long)rl->rlim_cur); |
| 226 | } else |
| 227 | info("RLIM_NOFILE is %lu", (unsigned long)rl->rlim_cur); |
| 228 | /* create event loop */ |
| 229 | ev = ev_new(); |
| 230 | if(ev_child_setup(ev)) fatal(0, "ev_child_setup failed"); |
| 231 | /* read config */ |
| 232 | config_uaudio_apis = uaudio_apis; |
| 233 | if(config_read(1, NULL)) |
| 234 | fatal(0, "cannot read configuration"); |
| 235 | /* make sure the home directory exists and has suitable permissions */ |
| 236 | make_home(); |
| 237 | /* Start the speaker process (as root! - so it can choose its nice value) */ |
| 238 | speaker_setup(ev); |
| 239 | /* set server nice value _after_ starting the speaker, so that they |
| 240 | * are independently niceable */ |
| 241 | xnice(config->nice_server); |
| 242 | /* change user */ |
| 243 | become_mortal(); |
| 244 | /* make sure we're not root, whatever the config says */ |
| 245 | if(getuid() == 0 || geteuid() == 0) fatal(0, "do not run as root"); |
| 246 | /* open a lockfile - we only want one copy of the server to run at once. */ |
| 247 | if(1) { |
| 248 | const char *lockfile; |
| 249 | int lockfd; |
| 250 | struct flock lock; |
| 251 | |
| 252 | lockfile = config_get_file("lock"); |
| 253 | if((lockfd = open(lockfile, O_RDWR|O_CREAT, 0600)) < 0) |
| 254 | fatal(errno, "error opening %s", lockfile); |
| 255 | cloexec(lockfd); |
| 256 | memset(&lock, 0, sizeof lock); |
| 257 | lock.l_type = F_WRLCK; |
| 258 | lock.l_whence = SEEK_SET; |
| 259 | if(fcntl(lockfd, F_SETLK, &lock) < 0) |
| 260 | fatal(errno, "error locking %s", lockfile); |
| 261 | } |
| 262 | /* initialize database environment */ |
| 263 | trackdb_init(TRACKDB_NORMAL_RECOVER|TRACKDB_MAY_CREATE); |
| 264 | trackdb_master(ev); |
| 265 | /* install new config; don't create socket */ |
| 266 | if(reconfigure(ev, RECONFIGURE_FIRST)) |
| 267 | fatal(0, "failed to read configuration"); |
| 268 | /* Open the database */ |
| 269 | trackdb_open(TRACKDB_CAN_UPGRADE); |
| 270 | /* load the queue and recently-played list */ |
| 271 | queue_read(); |
| 272 | recent_read(); |
| 273 | /* Arrange timeouts for schedule actions */ |
| 274 | schedule_init(ev); |
| 275 | /* pull in old users */ |
| 276 | trackdb_old_users(); |
| 277 | /* create a root login */ |
| 278 | trackdb_create_root(); |
| 279 | /* create sockets */ |
| 280 | reset_sockets(ev); |
| 281 | /* check for change to database parameters */ |
| 282 | dbparams_check(); |
| 283 | /* re-read config if we receive a SIGHUP */ |
| 284 | if(ev_signal(ev, SIGHUP, handle_sighup, 0)) fatal(0, "ev_signal failed"); |
| 285 | /* exit on SIGINT/SIGTERM */ |
| 286 | if(ev_signal(ev, SIGINT, handle_sigint, 0)) fatal(0, "ev_signal failed"); |
| 287 | if(ev_signal(ev, SIGTERM, handle_sigterm, 0)) fatal(0, "ev_signal failed"); |
| 288 | /* ignore SIGPIPE */ |
| 289 | signal(SIGPIPE, SIG_IGN); |
| 290 | /* Rescan immediately and then daily */ |
| 291 | create_periodic(ev, periodic_rescan, 86400, 1/*immediate*/); |
| 292 | /* Tidy up the database once a minute */ |
| 293 | create_periodic(ev, periodic_database_gc, 60, 0); |
| 294 | /* Check the volume immediately and then once a minute */ |
| 295 | create_periodic(ev, periodic_volume_check, 60, 1); |
| 296 | /* Check for a playable track once a second */ |
| 297 | create_periodic(ev, periodic_play_check, 1, 0); |
| 298 | /* Try adding a random track immediately and once every two seconds */ |
| 299 | create_periodic(ev, periodic_add_random, 2, 1); |
| 300 | /* enter the event loop */ |
| 301 | n = ev_run(ev); |
| 302 | /* if we exit the event loop, something must have gone wrong */ |
| 303 | fatal(errno, "ev_run returned %d", n); |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | Local Variables: |
| 308 | c-basic-offset:2 |
| 309 | comment-column:40 |
| 310 | fill-column:79 |
| 311 | End: |
| 312 | */ |