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 #include "core.h"
  38 #include "mainloop.h"
  39 #include "module.h"
  40 #include "mainloop-signal.h"
  41 #include "cmdline.h"
  42 #include "cli-command.h"
  43 #include "util.h"
  44 #include "sioman.h"
  45 #include "xmalloc.h"
  46 #include "cpulimit.h"
  47 #include "log.h"
  48 #include "daemon-conf.h"
  49 #include "dumpmodules.h"
  50
  51 static struct pa_mainloop *mainloop;
  52
  53 static void drop_root(void) {
  54     if (getuid() != 0 && geteuid() == 0) {
  55         pa_log(__FILE__": Started SUID root, dropping root rights.\n");
  56         setuid(getuid());
  57         seteuid(getuid());
  58     }
  59 }
  60
  61 static void signal_callback(struct pa_mainloop_api*m, struct pa_signal_event *e, int sig, void *userdata) {
  62     pa_log(__FILE__": Got signal %s.\n", pa_strsignal(sig));
  63
  64     switch (sig) {
  65         case SIGUSR1:
  66             pa_module_load(userdata, "module-cli", NULL);
  67             return;
  68
  69         case SIGUSR2:
  70             pa_module_load(userdata, "module-cli-protocol-unix", NULL);
  71             return;
  72
  73         case SIGINT:
  74         case SIGTERM:
  75         default:
  76             pa_log(__FILE__": Exiting.\n");
  77             m->quit(m, 1);
  78             return;
  79     }
  80 }
  81
  82 static void close_pipe(int p[2]) {
  83     if (p[0] != -1)
  84         close(p[0]);
  85     if (p[1] != -1)
  86         close(p[1]);
  87     p[0] = p[1] = -1;
  88 }
  89
  90 int main(int argc, char *argv[]) {
  91     struct pa_core *c;
  92     struct pa_strbuf *buf = NULL;
  93     struct pa_daemon_conf *conf;
  94     char *s;
  95     int r, retval = 1, d = 0;
  96     int daemon_pipe[2] = { -1, -1 };
  97
  98     r = lt_dlinit();
  99     assert(r == 0);
 100
 101     pa_log_set_ident("polypaudio");
 102
 103     conf = pa_daemon_conf_new();
 104
 105     if (pa_daemon_conf_load(conf, NULL) < 0)
 106         goto finish;
 107
 108     if (pa_daemon_conf_env(conf) < 0)
 109         goto finish;
 110
 111     if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
 112         pa_log(__FILE__": failed to parse command line.\n");
 113         goto finish;
 114     }
 115
 116     pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target, NULL);
 117
 118     if (conf->high_priority && conf->cmd == PA_CMD_DAEMON)
 119         pa_raise_priority();
 120
 121     drop_root();
 122
 123     if (conf->dl_search_path)
 124         lt_dlsetsearchpath(conf->dl_search_path);
 125
 126     switch (conf->cmd) {
 127         case PA_CMD_DUMP_MODULES:
 128             pa_dump_modules(conf, argc-d, argv+d);
 129             retval = 0;
 130             goto finish;
 131
 132         case PA_CMD_DUMP_CONF: {
 133             char *s = pa_daemon_conf_dump(conf);
 134             fputs(s, stdout);
 135             pa_xfree(s);
 136             retval = 0;
 137             goto finish;
 138         }
 139
 140         case PA_CMD_HELP :
 141             pa_cmdline_help(argv[0]);
 142             retval = 0;
 143             goto finish;
 144
 145         case PA_CMD_VERSION :
 146             printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
 147             retval = 0;
 148             goto finish;
 149
 150         default:
 151             assert(conf->cmd == PA_CMD_DAEMON);
 152     }
 153
 154     if (conf->daemonize) {
 155         pid_t child;
 156
 157         if (pa_stdio_acquire() < 0) {
 158             pa_log(__FILE__": failed to acquire stdio.\n");
 159             goto finish;
 160         }
 161
 162         if (pipe(daemon_pipe) < 0) {
 163             pa_log(__FILE__": failed to create pipe.\n");
 164             goto finish;
 165         }
 166
 167         if ((child = fork()) < 0) {
 168             pa_log(__FILE__": fork() failed: %s\n", strerror(errno));
 169             goto finish;
 170         }
 171
 172         if (child != 0) {
 173             /* Father */
 174
 175             close(daemon_pipe[1]);
 176             daemon_pipe[1] = -1;
 177
 178             if (pa_loop_read(daemon_pipe[0], &retval, sizeof(retval)) != sizeof(retval)) {
 179                 pa_log(__FILE__": read() failed: %s\n", strerror(errno));
 180                 retval = 1;
 181             }
 182
 183             goto finish;
 184         }
 185
 186         close(daemon_pipe[0]);
 187         daemon_pipe[0] = -1;
 188
 189
 190         if (conf->auto_log_target)
 191             pa_log_set_target(PA_LOG_SYSLOG, NULL);
 192
 193         setsid();
 194         setpgrp();
 195
 196         close(0);
 197         close(1);
 198     }
 199
 200
 201     pa_log(__FILE__": sizeof(pa_usec_t) = %u\n", sizeof(pa_usec_t));
 202
 203     mainloop = pa_mainloop_new();
 204     assert(mainloop);
 205
 206     r = pa_signal_init(pa_mainloop_get_api(mainloop));
 207     assert(r == 0);
 208     pa_signal_new(SIGINT, signal_callback, c);
 209     pa_signal_new(SIGTERM, signal_callback, c);
 210     signal(SIGPIPE, SIG_IGN);
 211
 212     c = pa_core_new(pa_mainloop_get_api(mainloop));
 213     assert(c);
 214
 215     pa_signal_new(SIGUSR1, signal_callback, c);
 216     pa_signal_new(SIGUSR2, signal_callback, c);
 217
 218     r = pa_cpu_limit_init(pa_mainloop_get_api(mainloop));
 219     assert(r == 0);
 220
 221     buf = pa_strbuf_new();
 222     assert(buf);
 223     if (conf->default_script_file)
 224         r = pa_cli_command_execute_file(c, conf->default_script_file, buf, &conf->fail, &conf->verbose);
 225
 226     if (r >= 0)
 227         r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail, &conf->verbose);
 228     pa_log(s = pa_strbuf_tostring_free(buf));
 229     pa_xfree(s);
 230
 231     if (r < 0 && conf->fail) {
 232         pa_log(__FILE__": failed to initialize daemon.\n");
 233         if (conf->daemonize)
 234             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
 235     } else if (!c->modules || pa_idxset_ncontents(c->modules) == 0) {
 236         pa_log(__FILE__": daemon startup without any loaded modules, refusing to work.\n");
 237         if (conf->daemonize)
 238             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
 239     } else {
 240         retval = 0;
 241         if (conf->daemonize)
 242             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
 243
 244         c->disallow_module_loading = conf->disallow_module_loading;
 245         c->exit_idle_time = conf->exit_idle_time;
 246         c->module_idle_time = conf->module_idle_time;
 247         c->scache_idle_time = conf->scache_idle_time;
 248         c->resample_method = conf->resample_method;
 249
 250         pa_log(__FILE__": Daemon startup complete.\n");
 251         if (pa_mainloop_run(mainloop, &retval) < 0)
 252             retval = 1;
 253         pa_log(__FILE__": Daemon shutdown initiated.\n");
 254     }
 255
 256     pa_core_free(c);
 257
 258     pa_cpu_limit_done();
 259     pa_signal_done();
 260     pa_mainloop_free(mainloop);
 261
 262     pa_log(__FILE__": Daemon terminated.\n");
 263
 264 finish:
 265
 266     if (conf)
 267         pa_daemon_conf_free(conf);
 268
 269     close_pipe(daemon_pipe);
 270
 271     lt_dlexit();
 272
 273     return retval;
 274 }