code.delx.au - pulseaudio/blob - polyp/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 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 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 <memblock.h>
  36
  37 #ifdef HAVE_LIBWRAP
  38 #include <syslog.h>
  39 #include <tcpd.h>
  40 #endif
  41
  42 #include "core.h"
  43 #include "mainloop.h"
  44 #include "module.h"
  45 #include "mainloop-signal.h"
  46 #include "cmdline.h"
  47 #include "cli-command.h"
  48 #include "util.h"
  49 #include "sioman.h"
  50 #include "xmalloc.h"
  51 #include "cpulimit.h"
  52 #include "log.h"
  53 #include "daemon-conf.h"
  54 #include "dumpmodules.h"
  55 #include "caps.h"
  56 #include "cli-text.h"
  57
  58 #ifdef HAVE_LIBWRAP
  59 /* Only one instance of these variables */
  60 int allow_severity = LOG_INFO;
  61 int deny_severity = LOG_WARNING;
  62 #endif
  63
  64 static void signal_callback(struct pa_mainloop_api*m, struct pa_signal_event *e, int sig, void *userdata) {
  65     pa_log(__FILE__": Got signal %s.\n", pa_strsignal(sig));
  66
  67     switch (sig) {
  68         case SIGUSR1:
  69             pa_module_load(userdata, "module-cli", NULL);
  70             return;
  71
  72         case SIGUSR2:
  73             pa_module_load(userdata, "module-cli-protocol-unix", NULL);
  74             return;
  75
  76         case SIGHUP: {
  77             int i;
  78
  79             for (i = 0;; i++) {
  80                 char *c;
  81                 switch (i) {
  82                     case 0:
  83                         c = pa_sink_list_to_string(userdata);
  84                         break;
  85                     case 1:
  86                         c = pa_source_list_to_string(userdata);
  87                         break;
  88                     case 2:
  89                         c = pa_sink_input_list_to_string(userdata);
  90                         break;
  91                     case 3:
  92                         c = pa_source_output_list_to_string(userdata);
  93                         break;
  94                     case 4:
  95                         c = pa_client_list_to_string(userdata);
  96                         break;
  97                     case 5:
  98                         c = pa_module_list_to_string(userdata);
  99                         break;
 100                     case 6:
 101                         c = pa_scache_list_to_string(userdata);
 102                         break;
 103                     case 7:
 104                         c = pa_autoload_list_to_string(userdata);
 105                         break;
 106                     default:
 107                         return;
 108                 }
 109                 pa_log(c);
 110                 pa_xfree(c);
 111             }
 112
 113             return;
 114         }
 115
 116         case SIGINT:
 117         case SIGTERM:
 118         default:
 119             pa_log(__FILE__": Exiting.\n");
 120             m->quit(m, 1);
 121             return;
 122     }
 123 }
 124
 125
 126             static void close_pipe(int p[2]) {
 127     if (p[0] != -1)
 128         close(p[0]);
 129     if (p[1] != -1)
 130         close(p[1]);
 131     p[0] = p[1] = -1;
 132 }
 133
 134 int main(int argc, char *argv[]) {
 135     struct pa_core *c;
 136     struct pa_strbuf *buf = NULL;
 137     struct pa_daemon_conf *conf;
 138     struct pa_mainloop *mainloop;
 139
 140     char *s;
 141     int r, retval = 1, d = 0;
 142     int daemon_pipe[2] = { -1, -1 };
 143     gid_t gid = (gid_t) -1;
 144     int suid_root;
 145
 146     pa_limit_caps();
 147
 148     suid_root = getuid() != 0 && geteuid() == 0;
 149
 150     if (suid_root && (pa_uid_in_group("realtime", &gid) <= 0 || gid >= 1000)) {
 151         pa_log(__FILE__": WARNING: called SUID root, but not in group 'realtime'.\n");
 152         pa_drop_root();
 153     }
 154
 155     LTDL_SET_PRELOADED_SYMBOLS();
 156
 157     r = lt_dlinit();
 158     assert(r == 0);
 159
 160     pa_log_set_ident("polypaudio");
 161
 162     conf = pa_daemon_conf_new();
 163
 164     if (pa_daemon_conf_load(conf, NULL) < 0)
 165         goto finish;
 166
 167     if (pa_daemon_conf_env(conf) < 0)
 168         goto finish;
 169
 170     if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
 171         pa_log(__FILE__": failed to parse command line.\n");
 172         goto finish;
 173     }
 174
 175     pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target, NULL);
 176
 177     if (conf->high_priority && conf->cmd == PA_CMD_DAEMON)
 178         pa_raise_priority();
 179
 180     pa_drop_caps();
 181
 182     if (suid_root)
 183         pa_drop_root();
 184
 185     if (conf->dl_search_path)
 186         lt_dlsetsearchpath(conf->dl_search_path);
 187
 188     switch (conf->cmd) {
 189         case PA_CMD_DUMP_MODULES:
 190             pa_dump_modules(conf, argc-d, argv+d);
 191             retval = 0;
 192             goto finish;
 193
 194         case PA_CMD_DUMP_CONF: {
 195             char *s = pa_daemon_conf_dump(conf);
 196             fputs(s, stdout);
 197             pa_xfree(s);
 198             retval = 0;
 199             goto finish;
 200         }
 201
 202         case PA_CMD_HELP :
 203             pa_cmdline_help(argv[0]);
 204             retval = 0;
 205             goto finish;
 206
 207         case PA_CMD_VERSION :
 208             printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
 209             retval = 0;
 210             goto finish;
 211
 212         default:
 213             assert(conf->cmd == PA_CMD_DAEMON);
 214     }
 215
 216     if (conf->daemonize) {
 217         pid_t child;
 218
 219         if (pa_stdio_acquire() < 0) {
 220             pa_log(__FILE__": failed to acquire stdio.\n");
 221             goto finish;
 222         }
 223
 224         if (pipe(daemon_pipe) < 0) {
 225             pa_log(__FILE__": failed to create pipe.\n");
 226             goto finish;
 227         }
 228
 229         if ((child = fork()) < 0) {
 230             pa_log(__FILE__": fork() failed: %s\n", strerror(errno));
 231             goto finish;
 232         }
 233
 234         if (child != 0) {
 235             /* Father */
 236
 237             close(daemon_pipe[1]);
 238             daemon_pipe[1] = -1;
 239
 240             if (pa_loop_read(daemon_pipe[0], &retval, sizeof(retval)) != sizeof(retval)) {
 241                 pa_log(__FILE__": read() failed: %s\n", strerror(errno));
 242                 retval = 1;
 243             }
 244
 245             if (conf->verbose)
 246                 pa_log(__FILE__": daemon startup %s.\n", retval ? "failed" : "succeeded");
 247
 248             goto finish;
 249         }
 250
 251         close(daemon_pipe[0]);
 252         daemon_pipe[0] = -1;
 253
 254         if (conf->auto_log_target)
 255             pa_log_set_target(PA_LOG_SYSLOG, NULL);
 256
 257         setsid();
 258         setpgid(0,0);
 259
 260         close(0);
 261         close(1);
 262     }
 263
 264     chdir("/");
 265
 266     pa_log(__FILE__": sizeof(pa_usec_t) = %u\n", sizeof(pa_usec_t));
 267
 268     mainloop = pa_mainloop_new();
 269     assert(mainloop);
 270
 271     r = pa_signal_init(pa_mainloop_get_api(mainloop));
 272     assert(r == 0);
 273     pa_signal_new(SIGINT, signal_callback, c);
 274     pa_signal_new(SIGTERM, signal_callback, c);
 275     signal(SIGPIPE, SIG_IGN);
 276
 277     c = pa_core_new(pa_mainloop_get_api(mainloop));
 278     assert(c);
 279
 280     pa_signal_new(SIGUSR1, signal_callback, c);
 281     pa_signal_new(SIGUSR2, signal_callback, c);
 282     pa_signal_new(SIGHUP, signal_callback, c);
 283
 284     r = pa_cpu_limit_init(pa_mainloop_get_api(mainloop));
 285     assert(r == 0);
 286
 287     buf = pa_strbuf_new();
 288     assert(buf);
 289     if (conf->default_script_file)
 290         r = pa_cli_command_execute_file(c, conf->default_script_file, buf, &conf->fail, &conf->verbose);
 291
 292     if (r >= 0)
 293         r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail, &conf->verbose);
 294     pa_log(s = pa_strbuf_tostring_free(buf));
 295     pa_xfree(s);
 296
 297     if (r < 0 && conf->fail) {
 298         pa_log(__FILE__": failed to initialize daemon.\n");
 299         if (conf->daemonize)
 300             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
 301     } else if (!c->modules || pa_idxset_ncontents(c->modules) == 0) {
 302         pa_log(__FILE__": daemon startup without any loaded modules, refusing to work.\n");
 303         if (conf->daemonize)
 304             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
 305     } else {
 306         retval = 0;
 307         if (conf->daemonize)
 308             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
 309
 310         c->disallow_module_loading = conf->disallow_module_loading;
 311         c->exit_idle_time = conf->exit_idle_time;
 312         c->module_idle_time = conf->module_idle_time;
 313         c->scache_idle_time = conf->scache_idle_time;
 314         c->resample_method = conf->resample_method;
 315
 316         pa_log(__FILE__": Daemon startup complete.\n");
 317         if (pa_mainloop_run(mainloop, &retval) < 0)
 318             retval = 1;
 319         pa_log(__FILE__": Daemon shutdown initiated.\n");
 320     }
 321
 322     pa_core_free(c);
 323
 324     pa_cpu_limit_done();
 325     pa_signal_done();
 326     pa_mainloop_free(mainloop);
 327
 328     pa_log(__FILE__": Daemon terminated.\n");
 329
 330 finish:
 331
 332     if (conf)
 333         pa_daemon_conf_free(conf);
 334
 335     close_pipe(daemon_pipe);
 336
 337     lt_dlexit();
 338
 339     return retval;
 340 }