code.delx.au - pulseaudio/blob - src/daemon/main.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   polypaudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with polypaudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <unistd.h>
  27 #include <errno.h>
  28 #include <string.h>
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31 #include <signal.h>
  32 #include <stddef.h>
  33 #include <assert.h>
  34 #include <ltdl.h>
  35 #include <limits.h>
  36 #include <fcntl.h>
  37 #include <unistd.h>
  38 #include <sys/types.h>
  39 #include <liboil/liboil.h>
  40
  41 #ifdef HAVE_SYS_IOCTL_H
  42 #include <sys/ioctl.h>
  43 #endif
  44
  45 #ifdef HAVE_LIBWRAP
  46 #include <syslog.h>
  47 #include <tcpd.h>
  48 #endif
  49
  50 #include "../polypcore/winsock.h"
  51
  52 #include <polyp/mainloop.h>
  53 #include <polyp/mainloop-signal.h>
  54 #include <polyp/xmalloc.h>
  55
  56 #include <polypcore/core.h>
  57 #include <polypcore/memblock.h>
  58 #include <polypcore/module.h>
  59 #include <polypcore/cli-command.h>
  60 #include <polypcore/log.h>
  61 #include <polypcore/core-util.h>
  62 #include <polypcore/sioman.h>
  63 #include <polypcore/cli-text.h>
  64 #include <polypcore/pid.h>
  65 #include <polypcore/namereg.h>
  66 #include <polypcore/random.h>
  67
  68 #include "cmdline.h"
  69 #include "cpulimit.h"
  70 #include "daemon-conf.h"
  71 #include "dumpmodules.h"
  72 #include "caps.h"
  73
  74 #ifdef HAVE_LIBWRAP
  75 /* Only one instance of these variables */
  76 int allow_severity = LOG_INFO;
  77 int deny_severity = LOG_WARNING;
  78 #endif
  79
  80 #ifdef OS_IS_WIN32
  81
  82 static void message_cb(pa_mainloop_api*a, pa_time_event*e, PA_GCC_UNUSED const struct timeval *tv, void *userdata) {
  83     MSG msg;
  84     struct timeval tvnext;
  85
  86     while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
  87         if (msg.message == WM_QUIT)
  88             raise(SIGTERM);
  89         else {
  90             TranslateMessage(&msg);
  91             DispatchMessage(&msg);
  92         }
  93     }
  94
  95     pa_timeval_add(pa_gettimeofday(&tvnext), 100000);
  96     a->time_restart(e, &tvnext);
  97 }
  98
  99 #endif
 100
 101 static void signal_callback(pa_mainloop_api*m, PA_GCC_UNUSED pa_signal_event *e, int sig, void *userdata) {
 102     pa_log_info(__FILE__": Got signal %s.", pa_strsignal(sig));
 103
 104     switch (sig) {
 105 #ifdef SIGUSR1
 106         case SIGUSR1:
 107             pa_module_load(userdata, "module-cli", NULL);
 108             break;
 109 #endif
 110
 111 #ifdef SIGUSR2
 112         case SIGUSR2:
 113             pa_module_load(userdata, "module-cli-protocol-unix", NULL);
 114             break;
 115 #endif
 116
 117 #ifdef SIGHUP
 118         case SIGHUP: {
 119             char *c = pa_full_status_string(userdata);
 120             pa_log_notice("%s", c);
 121             pa_xfree(c);
 122             return;
 123         }
 124 #endif
 125
 126         case SIGINT:
 127         case SIGTERM:
 128         default:
 129             pa_log_info(__FILE__": Exiting.");
 130             m->quit(m, 1);
 131             break;
 132     }
 133 }
 134
 135 static void close_pipe(int p[2]) {
 136     if (p[0] != -1)
 137         close(p[0]);
 138     if (p[1] != -1)
 139         close(p[1]);
 140     p[0] = p[1] = -1;
 141 }
 142
 143 int main(int argc, char *argv[]) {
 144     pa_core *c;
 145     pa_strbuf *buf = NULL;
 146     pa_daemon_conf *conf;
 147     pa_mainloop *mainloop;
 148
 149     char *s;
 150     int r, retval = 1, d = 0;
 151     int daemon_pipe[2] = { -1, -1 };
 152     int suid_root;
 153     int valid_pid_file = 0;
 154
 155 #ifdef HAVE_GETUID
 156     gid_t gid = (gid_t) -1;
 157 #endif
 158
 159 #ifdef OS_IS_WIN32
 160     pa_time_event *timer;
 161     struct timeval tv;
 162 #endif
 163
 164     pa_limit_caps();
 165
 166 #ifdef HAVE_GETUID
 167     suid_root = getuid() != 0 && geteuid() == 0;
 168
 169     if (suid_root && (pa_own_uid_in_group("realtime", &gid) <= 0 || gid >= 1000)) {
 170         pa_log_warn(__FILE__": WARNING: called SUID root, but not in group 'realtime'.");
 171         pa_drop_root();
 172     }
 173 #else
 174     suid_root = 0;
 175 #endif
 176
 177     LTDL_SET_PRELOADED_SYMBOLS();
 178
 179     r = lt_dlinit();
 180     assert(r == 0);
 181
 182 #ifdef OS_IS_WIN32
 183     {
 184         WSADATA data;
 185         WSAStartup(MAKEWORD(2, 0), &data);
 186     }
 187 #endif
 188
 189     pa_random_seed();
 190
 191     pa_log_set_ident("polypaudio");
 192
 193     conf = pa_daemon_conf_new();
 194
 195     if (pa_daemon_conf_load(conf, NULL) < 0)
 196         goto finish;
 197
 198     if (pa_daemon_conf_env(conf) < 0)
 199         goto finish;
 200
 201     if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
 202         pa_log(__FILE__": failed to parse command line.");
 203         goto finish;
 204     }
 205
 206     pa_log_set_maximal_level(conf->log_level);
 207     pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target, NULL);
 208
 209     if (conf->high_priority && conf->cmd == PA_CMD_DAEMON)
 210         pa_raise_priority();
 211
 212     pa_drop_caps();
 213
 214     if (suid_root)
 215         pa_drop_root();
 216
 217     if (conf->dl_search_path)
 218         lt_dlsetsearchpath(conf->dl_search_path);
 219
 220     switch (conf->cmd) {
 221         case PA_CMD_DUMP_MODULES:
 222             pa_dump_modules(conf, argc-d, argv+d);
 223             retval = 0;
 224             goto finish;
 225
 226         case PA_CMD_DUMP_CONF: {
 227             s = pa_daemon_conf_dump(conf);
 228             fputs(s, stdout);
 229             pa_xfree(s);
 230             retval = 0;
 231             goto finish;
 232         }
 233
 234         case PA_CMD_HELP :
 235             pa_cmdline_help(argv[0]);
 236             retval = 0;
 237             goto finish;
 238
 239         case PA_CMD_VERSION :
 240             printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
 241             retval = 0;
 242             goto finish;
 243
 244         case PA_CMD_CHECK: {
 245             pid_t pid;
 246
 247             if (pa_pid_file_check_running(&pid) < 0) {
 248                 pa_log_info(__FILE__": daemon not running");
 249             } else {
 250                 pa_log_info(__FILE__": daemon running as PID %u", pid);
 251                 retval = 0;
 252             }
 253
 254             goto finish;
 255
 256         }
 257         case PA_CMD_KILL:
 258
 259             if (pa_pid_file_kill(SIGINT, NULL) < 0)
 260                 pa_log(__FILE__": failed to kill daemon.");
 261             else
 262                 retval = 0;
 263
 264             goto finish;
 265
 266         default:
 267             assert(conf->cmd == PA_CMD_DAEMON);
 268     }
 269
 270     if (conf->daemonize) {
 271         pid_t child;
 272         int tty_fd;
 273
 274         if (pa_stdio_acquire() < 0) {
 275             pa_log(__FILE__": failed to acquire stdio.");
 276             goto finish;
 277         }
 278
 279 #ifdef HAVE_FORK
 280         if (pipe(daemon_pipe) < 0) {
 281             pa_log(__FILE__": failed to create pipe.");
 282             goto finish;
 283         }
 284
 285         if ((child = fork()) < 0) {
 286             pa_log(__FILE__": fork() failed: %s", strerror(errno));
 287             goto finish;
 288         }
 289
 290         if (child != 0) {
 291             /* Father */
 292
 293             close(daemon_pipe[1]);
 294             daemon_pipe[1] = -1;
 295
 296             if (pa_loop_read(daemon_pipe[0], &retval, sizeof(retval)) != sizeof(retval)) {
 297                 pa_log(__FILE__": read() failed: %s", strerror(errno));
 298                 retval = 1;
 299             }
 300
 301             if (retval)
 302                 pa_log(__FILE__": daemon startup failed.");
 303             else
 304                 pa_log_info(__FILE__": daemon startup successful.");
 305
 306             goto finish;
 307         }
 308
 309         close(daemon_pipe[0]);
 310         daemon_pipe[0] = -1;
 311 #endif
 312
 313         if (conf->auto_log_target)
 314             pa_log_set_target(PA_LOG_SYSLOG, NULL);
 315
 316 #ifdef HAVE_SETSID
 317         setsid();
 318 #endif
 319 #ifdef HAVE_SETPGID
 320         setpgid(0,0);
 321 #endif
 322
 323 #ifndef OS_IS_WIN32
 324         close(0);
 325         close(1);
 326         close(2);
 327
 328         open("/dev/null", O_RDONLY);
 329         open("/dev/null", O_WRONLY);
 330         open("/dev/null", O_WRONLY);
 331 #else
 332         FreeConsole();
 333 #endif
 334
 335 #ifdef SIGTTOU
 336         signal(SIGTTOU, SIG_IGN);
 337 #endif
 338 #ifdef SIGTTIN
 339         signal(SIGTTIN, SIG_IGN);
 340 #endif
 341 #ifdef SIGTSTP
 342         signal(SIGTSTP, SIG_IGN);
 343 #endif
 344
 345 #ifdef TIOCNOTTY
 346         if ((tty_fd = open("/dev/tty", O_RDWR)) >= 0) {
 347             ioctl(tty_fd, TIOCNOTTY, (char*) 0);
 348             close(tty_fd);
 349         }
 350 #endif
 351     }
 352
 353     chdir("/");
 354
 355     if (conf->use_pid_file) {
 356         if (pa_pid_file_create() < 0) {
 357             pa_log(__FILE__": pa_pid_file_create() failed.");
 358 #ifdef HAVE_FORK
 359             if (conf->daemonize)
 360                 pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
 361 #endif
 362             goto finish;
 363         }
 364
 365         valid_pid_file = 1;
 366     }
 367
 368 #ifdef SIGPIPE
 369     signal(SIGPIPE, SIG_IGN);
 370 #endif
 371
 372     mainloop = pa_mainloop_new();
 373     assert(mainloop);
 374
 375     c = pa_core_new(pa_mainloop_get_api(mainloop));
 376     assert(c);
 377
 378     r = pa_signal_init(pa_mainloop_get_api(mainloop));
 379     assert(r == 0);
 380     pa_signal_new(SIGINT, signal_callback, c);
 381     pa_signal_new(SIGTERM, signal_callback, c);
 382
 383 #ifdef SIGUSR1
 384     pa_signal_new(SIGUSR1, signal_callback, c);
 385 #endif
 386 #ifdef SIGUSR2
 387     pa_signal_new(SIGUSR2, signal_callback, c);
 388 #endif
 389 #ifdef SIGHUP
 390     pa_signal_new(SIGHUP, signal_callback, c);
 391 #endif
 392
 393 #ifdef OS_IS_WIN32
 394     timer = pa_mainloop_get_api(mainloop)->time_new(
 395         pa_mainloop_get_api(mainloop), pa_gettimeofday(&tv), message_cb, NULL);
 396     assert(timer);
 397 #endif
 398
 399     if (conf->daemonize)
 400         c->running_as_daemon = 1;
 401
 402     oil_init();
 403
 404     r = pa_cpu_limit_init(pa_mainloop_get_api(mainloop));
 405     assert(r == 0);
 406
 407     buf = pa_strbuf_new();
 408     if (conf->default_script_file)
 409         r = pa_cli_command_execute_file(c, conf->default_script_file, buf, &conf->fail);
 410
 411     if (r >= 0)
 412         r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
 413     pa_log_error("%s", s = pa_strbuf_tostring_free(buf));
 414     pa_xfree(s);
 415
 416     if (r < 0 && conf->fail) {
 417         pa_log(__FILE__": failed to initialize daemon.");
 418 #ifdef HAVE_FORK
 419         if (conf->daemonize)
 420             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
 421 #endif
 422     } else if (!c->modules || pa_idxset_size(c->modules) == 0) {
 423         pa_log(__FILE__": daemon startup without any loaded modules, refusing to work.");
 424 #ifdef HAVE_FORK
 425         if (conf->daemonize)
 426             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
 427 #endif
 428     } else {
 429
 430         retval = 0;
 431 #ifdef HAVE_FORK
 432         if (conf->daemonize)
 433             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
 434 #endif
 435
 436         c->disallow_module_loading = conf->disallow_module_loading;
 437         c->exit_idle_time = conf->exit_idle_time;
 438         c->module_idle_time = conf->module_idle_time;
 439         c->scache_idle_time = conf->scache_idle_time;
 440         c->resample_method = conf->resample_method;
 441
 442         if (c->default_sink_name &&
 443             pa_namereg_get(c, c->default_sink_name, PA_NAMEREG_SINK, 1) == NULL) {
 444             pa_log_error("%s : Fatal error. Default sink name (%s) does not exist in name register.", __FILE__, c->default_sink_name);
 445             retval = 1;
 446         } else {
 447             pa_log_info(__FILE__": Daemon startup complete.");
 448             if (pa_mainloop_run(mainloop, &retval) < 0)
 449                 retval = 1;
 450             pa_log_info(__FILE__": Daemon shutdown initiated.");
 451         }
 452     }
 453
 454 #ifdef OS_IS_WIN32
 455     pa_mainloop_get_api(mainloop)->time_free(timer);
 456 #endif
 457
 458     pa_core_free(c);
 459
 460     pa_cpu_limit_done();
 461     pa_signal_done();
 462     pa_mainloop_free(mainloop);
 463
 464     pa_log_info(__FILE__": Daemon terminated.");
 465
 466 finish:
 467
 468     if (conf)
 469         pa_daemon_conf_free(conf);
 470
 471     if (valid_pid_file)
 472         pa_pid_file_remove();
 473
 474     close_pipe(daemon_pipe);
 475
 476 #ifdef OS_IS_WIN32
 477     WSACleanup();
 478 #endif
 479
 480     lt_dlexit();
 481
 482     return retval;
 483 }