| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2004-2008 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 | #include "types.h" |
| 23 | |
| 24 | #include <stdio.h> |
| 25 | #include <getopt.h> |
| 26 | #include <pwd.h> |
| 27 | #include <grp.h> |
| 28 | #include <sys/types.h> |
| 29 | #include <errno.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <string.h> |
| 32 | #include <unistd.h> |
| 33 | #include <signal.h> |
| 34 | #include <sys/socket.h> |
| 35 | #include <time.h> |
| 36 | #include <locale.h> |
| 37 | #include <syslog.h> |
| 38 | #include <sys/time.h> |
| 39 | #include <pcre.h> |
| 40 | #include <fcntl.h> |
| 41 | #include <gcrypt.h> |
| 42 | |
| 43 | #include "daemonize.h" |
| 44 | #include "event.h" |
| 45 | #include "log.h" |
| 46 | #include "configuration.h" |
| 47 | #include "rights.h" |
| 48 | #include "trackdb.h" |
| 49 | #include "queue.h" |
| 50 | #include "mem.h" |
| 51 | #include "play.h" |
| 52 | #include "server.h" |
| 53 | #include "state.h" |
| 54 | #include "syscalls.h" |
| 55 | #include "defs.h" |
| 56 | #include "user.h" |
| 57 | #include "mixer.h" |
| 58 | #include "eventlog.h" |
| 59 | #include "printf.h" |
| 60 | #include "version.h" |
| 61 | |
| 62 | static ev_source *ev; |
| 63 | |
| 64 | static const struct option options[] = { |
| 65 | { "help", no_argument, 0, 'h' }, |
| 66 | { "version", no_argument, 0, 'V' }, |
| 67 | { "config", required_argument, 0, 'c' }, |
| 68 | { "debug", no_argument, 0, 'd' }, |
| 69 | { "foreground", no_argument, 0, 'f' }, |
| 70 | { "log", required_argument, 0, 'l' }, |
| 71 | { "pidfile", required_argument, 0, 'P' }, |
| 72 | { "wide-open", no_argument, 0, 'w' }, |
| 73 | { "syslog", no_argument, 0, 's' }, |
| 74 | { 0, 0, 0, 0 } |
| 75 | }; |
| 76 | |
| 77 | /* display usage message and terminate */ |
| 78 | static void help(void) { |
| 79 | xprintf("Usage:\n" |
| 80 | " disorderd [OPTIONS]\n" |
| 81 | "Options:\n" |
| 82 | " --help, -h Display usage message\n" |
| 83 | " --version, -V Display version number\n" |
| 84 | " --config PATH, -c PATH Set configuration file\n" |
| 85 | " --debug, -d Turn on debugging\n" |
| 86 | " --foreground, -f Do not become a daemon\n" |
| 87 | " --syslog, -s Log to syslog even with -f\n" |
| 88 | " --pidfile PATH, -P PATH Leave a pidfile\n"); |
| 89 | xfclose(stdout); |
| 90 | exit(0); |
| 91 | } |
| 92 | |
| 93 | /* signals ------------------------------------------------------------------ */ |
| 94 | |
| 95 | /* SIGHUP callback */ |
| 96 | static int handle_sighup(ev_source attribute((unused)) *ev_, |
| 97 | int attribute((unused)) sig, |
| 98 | void attribute((unused)) *u) { |
| 99 | info("received SIGHUP"); |
| 100 | reconfigure(ev, 1); |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | /* fatal signals */ |
| 105 | |
| 106 | static int handle_sigint(ev_source attribute((unused)) *ev_, |
| 107 | int attribute((unused)) sig, |
| 108 | void attribute((unused)) *u) { |
| 109 | info("received SIGINT"); |
| 110 | quit(ev); |
| 111 | } |
| 112 | |
| 113 | static int handle_sigterm(ev_source attribute((unused)) *ev_, |
| 114 | int attribute((unused)) sig, |
| 115 | void attribute((unused)) *u) { |
| 116 | info("received SIGTERM"); |
| 117 | quit(ev); |
| 118 | } |
| 119 | |
| 120 | /* periodic actions --------------------------------------------------------- */ |
| 121 | |
| 122 | struct periodic_data { |
| 123 | void (*callback)(ev_source *); |
| 124 | int period; |
| 125 | }; |
| 126 | |
| 127 | static int periodic_callback(ev_source *ev_, |
| 128 | const struct timeval attribute((unused)) *now, |
| 129 | void *u) { |
| 130 | struct timeval w; |
| 131 | struct periodic_data *const pd = u; |
| 132 | |
| 133 | pd->callback(ev_); |
| 134 | gettimeofday(&w, 0); |
| 135 | w.tv_sec += pd->period; |
| 136 | ev_timeout(ev, 0, &w, periodic_callback, pd); |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | /** @brief Create a periodic action |
| 141 | * @param ev Event loop |
| 142 | * @param callback Callback function |
| 143 | * @param period Interval between calls in seconds |
| 144 | * @param immediate If true, call @p callback straight away |
| 145 | */ |
| 146 | static void create_periodic(ev_source *ev_, |
| 147 | void (*callback)(ev_source *), |
| 148 | int period, |
| 149 | int immediate) { |
| 150 | struct timeval w; |
| 151 | struct periodic_data *const pd = xmalloc(sizeof *pd); |
| 152 | |
| 153 | pd->callback = callback; |
| 154 | pd->period = period; |
| 155 | if(immediate) |
| 156 | callback(ev_); |
| 157 | gettimeofday(&w, 0); |
| 158 | w.tv_sec += period; |
| 159 | ev_timeout(ev_, 0, &w, periodic_callback, pd); |
| 160 | } |
| 161 | |
| 162 | static void periodic_rescan(ev_source *ev_) { |
| 163 | trackdb_rescan(ev_, 1/*check*/); |
| 164 | } |
| 165 | |
| 166 | static void periodic_database_gc(ev_source attribute((unused)) *ev_) { |
| 167 | trackdb_gc(); |
| 168 | } |
| 169 | |
| 170 | static void periodic_volume_check(ev_source attribute((unused)) *ev_) { |
| 171 | int l, r; |
| 172 | char lb[32], rb[32]; |
| 173 | |
| 174 | if(!mixer_control(-1/*as configured*/, &l, &r, 0)) { |
| 175 | if(l != volume_left || r != volume_right) { |
| 176 | volume_left = l; |
| 177 | volume_right = r; |
| 178 | snprintf(lb, sizeof lb, "%d", l); |
| 179 | snprintf(rb, sizeof rb, "%d", r); |
| 180 | eventlog("volume", lb, rb, (char *)0); |
| 181 | } |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | static void periodic_play_check(ev_source *ev_) { |
| 186 | play(ev_); |
| 187 | } |
| 188 | |
| 189 | static void periodic_add_random(ev_source *ev_) { |
| 190 | add_random_track(ev_); |
| 191 | } |
| 192 | |
| 193 | /* We fix the path to include the bindir and sbindir we were installed into */ |
| 194 | static void fix_path(void) { |
| 195 | char *path = getenv("PATH"); |
| 196 | static char *newpath; |
| 197 | /* static or libgc collects it! */ |
| 198 | |
| 199 | if(!path) |
| 200 | error(0, "PATH is not set at all!"); |
| 201 | |
| 202 | if(*finkbindir && strcmp(finkbindir, "/")) |
| 203 | /* We appear to be a finkized mac; include fink on the path in case the |
| 204 | * tools we need are there. */ |
| 205 | byte_xasprintf(&newpath, "PATH=%s:%s:%s:%s", |
| 206 | path, bindir, sbindir, finkbindir); |
| 207 | else |
| 208 | byte_xasprintf(&newpath, "PATH=%s:%s:%s", path, bindir, sbindir); |
| 209 | putenv(newpath); |
| 210 | info("%s", newpath); |
| 211 | } |
| 212 | |
| 213 | int main(int argc, char **argv) { |
| 214 | int n, background = 1, logsyslog = 0; |
| 215 | const char *pidfile = 0; |
| 216 | |
| 217 | set_progname(argv); |
| 218 | mem_init(); |
| 219 | if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale"); |
| 220 | /* garbage-collect PCRE's memory */ |
| 221 | pcre_malloc = xmalloc; |
| 222 | pcre_free = xfree; |
| 223 | while((n = getopt_long(argc, argv, "hVc:dfP:Ns", options, 0)) >= 0) { |
| 224 | switch(n) { |
| 225 | case 'h': help(); |
| 226 | case 'V': version("disorderd"); |
| 227 | case 'c': configfile = optarg; break; |
| 228 | case 'd': debugging = 1; break; |
| 229 | case 'f': background = 0; break; |
| 230 | case 'P': pidfile = optarg; break; |
| 231 | case 's': logsyslog = 1; break; |
| 232 | case 'w': wideopen = 1; break; |
| 233 | default: fatal(0, "invalid option"); |
| 234 | } |
| 235 | } |
| 236 | /* go into background if necessary */ |
| 237 | if(background) |
| 238 | daemonize(progname, LOG_DAEMON, pidfile); |
| 239 | else if(logsyslog) { |
| 240 | /* If we're running under some kind of daemon supervisor then we may want |
| 241 | * to log to syslog but not to go into background */ |
| 242 | openlog(progname, LOG_PID, LOG_DAEMON); |
| 243 | log_default = &log_syslog; |
| 244 | } |
| 245 | info("process ID %lu", (unsigned long)getpid()); |
| 246 | fix_path(); |
| 247 | srand(time(0)); /* don't start the same every time */ |
| 248 | /* gcrypt initialization */ |
| 249 | gcry_control(GCRYCTL_INIT_SECMEM, 1); |
| 250 | /* create event loop */ |
| 251 | ev = ev_new(); |
| 252 | if(ev_child_setup(ev)) fatal(0, "ev_child_setup failed"); |
| 253 | /* read config */ |
| 254 | if(config_read(1)) |
| 255 | fatal(0, "cannot read configuration"); |
| 256 | /* make sure the home directory exists and has suitable permissions */ |
| 257 | make_home(); |
| 258 | /* Start the speaker process (as root! - so it can choose its nice value) */ |
| 259 | speaker_setup(ev); |
| 260 | /* set server nice value _after_ starting the speaker, so that they |
| 261 | * are independently niceable */ |
| 262 | xnice(config->nice_server); |
| 263 | /* change user */ |
| 264 | become_mortal(); |
| 265 | /* make sure we're not root, whatever the config says */ |
| 266 | if(getuid() == 0 || geteuid() == 0) fatal(0, "do not run as root"); |
| 267 | /* open a lockfile - we only want one copy of the server to run at once. */ |
| 268 | if(config->lock) { |
| 269 | const char *lockfile; |
| 270 | int lockfd; |
| 271 | struct flock lock; |
| 272 | |
| 273 | lockfile = config_get_file("lock"); |
| 274 | if((lockfd = open(lockfile, O_RDWR|O_CREAT, 0600)) < 0) |
| 275 | fatal(errno, "error opening %s", lockfile); |
| 276 | cloexec(lockfd); |
| 277 | memset(&lock, 0, sizeof lock); |
| 278 | lock.l_type = F_WRLCK; |
| 279 | lock.l_whence = SEEK_SET; |
| 280 | if(fcntl(lockfd, F_SETLK, &lock) < 0) |
| 281 | fatal(errno, "error locking %s", lockfile); |
| 282 | } |
| 283 | /* initialize database environment */ |
| 284 | trackdb_init(TRACKDB_NORMAL_RECOVER|TRACKDB_MAY_CREATE); |
| 285 | trackdb_master(ev); |
| 286 | /* install new config (calls trackdb_open()) */ |
| 287 | reconfigure(ev, 0); |
| 288 | /* pull in old users */ |
| 289 | trackdb_old_users(); |
| 290 | /* create a root login */ |
| 291 | trackdb_create_root(); |
| 292 | /* re-read config if we receive a SIGHUP */ |
| 293 | if(ev_signal(ev, SIGHUP, handle_sighup, 0)) fatal(0, "ev_signal failed"); |
| 294 | /* exit on SIGINT/SIGTERM */ |
| 295 | if(ev_signal(ev, SIGINT, handle_sigint, 0)) fatal(0, "ev_signal failed"); |
| 296 | if(ev_signal(ev, SIGTERM, handle_sigterm, 0)) fatal(0, "ev_signal failed"); |
| 297 | /* ignore SIGPIPE */ |
| 298 | signal(SIGPIPE, SIG_IGN); |
| 299 | /* Rescan immediately and then daily */ |
| 300 | create_periodic(ev, periodic_rescan, 86400, 1/*immediate*/); |
| 301 | /* Tidy up the database once a minute */ |
| 302 | create_periodic(ev, periodic_database_gc, 60, 0); |
| 303 | /* Check the volume immediately and then once a minute */ |
| 304 | create_periodic(ev, periodic_volume_check, 60, 1); |
| 305 | /* Check for a playable track once a second */ |
| 306 | create_periodic(ev, periodic_play_check, 1, 0); |
| 307 | /* Try adding a random track immediately and once every two seconds */ |
| 308 | create_periodic(ev, periodic_add_random, 2, 1); |
| 309 | /* enter the event loop */ |
| 310 | n = ev_run(ev); |
| 311 | /* if we exit the event loop, something must have gone wrong */ |
| 312 | fatal(errno, "ev_run returned %d", n); |
| 313 | } |
| 314 | |
| 315 | /* |
| 316 | Local Variables: |
| 317 | c-basic-offset:2 |
| 318 | comment-column:40 |
| 319 | fill-column:79 |
| 320 | End: |
| 321 | */ |