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
  46 static struct pa_mainloop *mainloop;
  47
  48 static void exit_signal_callback(void *id, int sig, void *userdata) {
  49     struct pa_mainloop_api* m = pa_mainloop_get_api(mainloop);
  50     m->quit(m, 1);
  51     fprintf(stderr, __FILE__": got signal.\n");
  52 }
  53
  54 static void aux_signal_callback(void *id, int sig, void *userdata) {
  55     struct pa_core *c = userdata;
  56     assert(c);
  57     pa_module_load(c, sig == SIGUSR1 ? "module-cli" : "module-cli-protocol-unix", NULL);
  58 }
  59
  60 static void close_pipe(int p[2]) {
  61     if (p[0] != -1)
  62         close(p[0]);
  63     if (p[1] != -1)
  64         close(p[1]);
  65     p[0] = p[1] = -1;
  66 }
  67
  68 int main(int argc, char *argv[]) {
  69     struct pa_core *c;
  70     struct pa_cmdline *cmdline = NULL;
  71     struct pa_strbuf *buf = NULL;
  72     char *s;
  73     int r, retval = 1;
  74     int daemon_pipe[2] = { -1, -1 };
  75
  76     if (!(cmdline = pa_cmdline_parse(argc, argv))) {
  77         fprintf(stderr, __FILE__": failed to parse command line.\n");
  78         goto finish;
  79     }
  80
  81     if (cmdline->help) {
  82         pa_cmdline_help(argv[0]);
  83         retval = 0;
  84         goto finish;
  85     }
  86
  87     if (cmdline->daemonize) {
  88         pid_t child;
  89
  90         if (pa_stdio_acquire() < 0) {
  91             fprintf(stderr, __FILE__": failed to acquire stdio.\n");
  92             goto finish;
  93         }
  94
  95         if (pipe(daemon_pipe) < 0) {
  96             fprintf(stderr, __FILE__": failed to create pipe.\n");
  97             goto finish;
  98         }
  99
 100         if ((child = fork()) < 0) {
 101             fprintf(stderr, __FILE__": fork() failed: %s\n", strerror(errno));
 102             goto finish;
 103         }
 104
 105         if (child != 0) {
 106             /* Father */
 107
 108             close(daemon_pipe[1]);
 109             daemon_pipe[1] = -1;
 110
 111             if (pa_loop_read(daemon_pipe[0], &retval, sizeof(retval)) != sizeof(retval)) {
 112                 fprintf(stderr, __FILE__": read() failed: %s\n", strerror(errno));
 113                 retval = 1;
 114             }
 115
 116             goto finish;
 117         }
 118
 119         close(daemon_pipe[0]);
 120         daemon_pipe[0] = -1;
 121
 122         setsid();
 123         setpgrp();
 124     }
 125
 126     r = lt_dlinit();
 127     assert(r == 0);
 128 #ifdef DLSEARCHDIR
 129     lt_dladdsearchdir(DLSEARCHDIR);
 130 #endif
 131
 132     mainloop = pa_mainloop_new();
 133     assert(mainloop);
 134
 135     r = pa_signal_init(pa_mainloop_get_api(mainloop));
 136     assert(r == 0);
 137     pa_signal_register(SIGINT, exit_signal_callback, NULL);
 138     signal(SIGPIPE, SIG_IGN);
 139
 140     c = pa_core_new(pa_mainloop_get_api(mainloop));
 141     assert(c);
 142
 143     pa_signal_register(SIGUSR1, aux_signal_callback, c);
 144     pa_signal_register(SIGUSR2, aux_signal_callback, c);
 145
 146     buf = pa_strbuf_new();
 147     assert(buf);
 148     r = pa_cli_command_execute(c, cmdline->cli_commands, buf, &cmdline->fail, &cmdline->verbose);
 149     fprintf(stderr, s = pa_strbuf_tostring_free(buf));
 150     free(s);
 151
 152     if (r < 0 && cmdline->fail) {
 153         fprintf(stderr, __FILE__": failed to initialize daemon.\n");
 154         if (cmdline->daemonize)
 155             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
 156     } else if (!c->modules || pa_idxset_ncontents(c->modules) == 0) {
 157         fprintf(stderr, __FILE__": daemon startup without any loaded modules, refusing to work.\n");
 158         if (cmdline->daemonize)
 159             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
 160     } else {
 161         retval = 0;
 162         if (cmdline->daemonize)
 163             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval));
 164         fprintf(stderr, __FILE__": mainloop entry.\n");
 165         if (pa_mainloop_run(mainloop, &retval) < 0)
 166             retval = 1;
 167         fprintf(stderr, __FILE__": mainloop exit.\n");
 168     }
 169
 170     pa_core_free(c);
 171
 172     pa_signal_done();
 173     pa_mainloop_free(mainloop);
 174
 175     lt_dlexit();
 176
 177 finish:
 178
 179     if (cmdline)
 180         pa_cmdline_free(cmdline);
 181
 182     close_pipe(daemon_pipe);
 183
 184     return retval;
 185 }