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/***
This file is part of PulseAudio.
Copyright 2004-2006 Lennart Poettering
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <getopt.h>
#include <locale.h>
#ifdef __linux__
#include <sys/prctl.h>
#endif
#include <pulse/i18n.h>
#include <pulse/pulseaudio.h>
#include <pulsecore/macro.h>
#define BUFSIZE 1024
static pa_context *context = NULL;
static pa_mainloop_api *mainloop_api = NULL;
static char **child_argv = NULL;
static int child_argc = 0;
static pid_t child_pid = (pid_t) -1;
static int child_ret = 0;
static int dead = 1;
static void quit(int ret) {
pa_assert(mainloop_api);
mainloop_api->quit(mainloop_api, ret);
}
static void context_drain_complete(pa_context *c, void *userdata) {
pa_context_disconnect(c);
}
static void drain(void) {
pa_operation *o;
if (!(o = pa_context_drain(context, context_drain_complete, NULL)))
pa_context_disconnect(context);
else
pa_operation_unref(o);
}
static void start_child(void) {
if ((child_pid = fork()) < 0) {
fprintf(stderr, _("fork(): %s\n"), strerror(errno));
quit(1);
} else if (child_pid == 0) {
/* Child */
#ifdef __linux__
prctl(PR_SET_PDEATHSIG, SIGTERM, 0, 0, 0);
#endif
if (execvp(child_argv[0], child_argv) < 0)
fprintf(stderr, _("execvp(): %s\n"), strerror(errno));
_exit(1);
} else {
/* parent */
dead = 0;
}
}
static void suspend_complete(pa_context *c, int success, void *userdata) {
static int n = 0;
n++;
if (!success) {
fprintf(stderr, _("Failure to suspend: %s\n"), pa_strerror(pa_context_errno(c)));
quit(1);
return;
}
if (n >= 2)
start_child();
}
static void resume_complete(pa_context *c, int success, void *userdata) {
static int n = 0;
n++;
if (!success) {
fprintf(stderr, _("Failure to resume: %s\n"), pa_strerror(pa_context_errno(c)));
quit(1);
return;
}
if (n >= 2)
drain(); /* drain and quit */
}
static void context_state_callback(pa_context *c, void *userdata) {
pa_assert(c);
switch (pa_context_get_state(c)) {
case PA_CONTEXT_CONNECTING:
case PA_CONTEXT_AUTHORIZING:
case PA_CONTEXT_SETTING_NAME:
break;
case PA_CONTEXT_READY:
if (pa_context_is_local(c)) {
pa_operation_unref(pa_context_suspend_sink_by_index(c, PA_INVALID_INDEX, 1, suspend_complete, NULL));
pa_operation_unref(pa_context_suspend_source_by_index(c, PA_INVALID_INDEX, 1, suspend_complete, NULL));
} else {
fprintf(stderr, _("WARNING: Sound server is not local, not suspending.\n"));
start_child();
}
break;
case PA_CONTEXT_TERMINATED:
quit(0);
break;
case PA_CONTEXT_FAILED:
default:
fprintf(stderr, _("Connection failure: %s\n"), pa_strerror(pa_context_errno(c)));
pa_context_unref(context);
context = NULL;
if (child_pid == (pid_t) -1)
/* not started yet, then we do it now */
start_child();
else if (dead)
/* already started, and dead, so let's quit */
quit(1);
break;
}
}
static void sigint_callback(pa_mainloop_api *m, pa_signal_event *e, int sig, void *userdata) {
fprintf(stderr, _("Got SIGINT, exiting.\n"));
quit(0);
}
static void sigchld_callback(pa_mainloop_api *m, pa_signal_event *e, int sig, void *userdata) {
int status = 0;
pid_t p;
p = waitpid(-1, &status, WNOHANG);
if (p != child_pid)
return;
dead = 1;
if (WIFEXITED(status))
child_ret = WEXITSTATUS(status);
else if (WIFSIGNALED(status)) {
fprintf(stderr, _("WARNING: Child process terminated by signal %u\n"), WTERMSIG(status));
child_ret = 1;
}
if (context) {
if (pa_context_is_local(context)) {
/* A context is around, so let's resume */
pa_operation_unref(pa_context_suspend_sink_by_index(context, PA_INVALID_INDEX, 0, resume_complete, NULL));
pa_operation_unref(pa_context_suspend_source_by_index(context, PA_INVALID_INDEX, 0, resume_complete, NULL));
} else
drain();
} else
/* Hmm, no context here, so let's terminate right away */
quit(0);
}
static void help(const char *argv0) {
printf(_("%s [options] ... \n\n"
" -h, --help Show this help\n"
" --version Show version\n"
" -s, --server=SERVER The name of the server to connect to\n\n"),
argv0);
}
enum {
ARG_VERSION = 256
};
int main(int argc, char *argv[]) {
pa_mainloop* m = NULL;
int c, ret = 1;
char *server = NULL, *bn;
static const struct option long_options[] = {
{"server", 1, NULL, 's'},
{"version", 0, NULL, ARG_VERSION},
{"help", 0, NULL, 'h'},
{NULL, 0, NULL, 0}
};
setlocale(LC_ALL, "");
bindtextdomain(GETTEXT_PACKAGE, PULSE_LOCALEDIR);
if (!(bn = strrchr(argv[0], '/')))
bn = argv[0];
else
bn++;
while ((c = getopt_long(argc, argv, "s:h", long_options, NULL)) != -1) {
switch (c) {
case 'h' :
help(bn);
ret = 0;
goto quit;
case ARG_VERSION:
printf(_("pasuspender %s\n"
"Compiled with libpulse %s\n"
"Linked with libpulse %s\n"),
PACKAGE_VERSION,
pa_get_headers_version(),
pa_get_library_version());
ret = 0;
goto quit;
case 's':
pa_xfree(server);
server = pa_xstrdup(optarg);
break;
default:
goto quit;
}
}
child_argv = argv + optind;
child_argc = argc - optind;
if (child_argc <= 0) {
help(bn);
ret = 0;
goto quit;
}
if (!(m = pa_mainloop_new())) {
fprintf(stderr, _("pa_mainloop_new() failed.\n"));
goto quit;
}
pa_assert_se(mainloop_api = pa_mainloop_get_api(m));
pa_assert_se(pa_signal_init(mainloop_api) == 0);
pa_signal_new(SIGINT, sigint_callback, NULL);
pa_signal_new(SIGCHLD, sigchld_callback, NULL);
#ifdef SIGPIPE
signal(SIGPIPE, SIG_IGN);
#endif
if (!(context = pa_context_new(mainloop_api, bn))) {
fprintf(stderr, _("pa_context_new() failed.\n"));
goto quit;
}
pa_context_set_state_callback(context, context_state_callback, NULL);
pa_context_connect(context, server, PA_CONTEXT_NOAUTOSPAWN, NULL);
if (pa_mainloop_run(m, &ret) < 0) {
fprintf(stderr, _("pa_mainloop_run() failed.\n"));
goto quit;
}
quit:
if (context)
pa_context_unref(context);
if (m) {
pa_signal_done();
pa_mainloop_free(m);
}
pa_xfree(server);
if (!dead)
kill(child_pid, SIGTERM);
return ret == 0 ? child_ret : ret;
}
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