/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "client.h"
#include "idle.h"
#include "command.h"
#include "playlist.h"
#include "database.h"
#include "update.h"
#include "player_thread.h"
#include "listen.h"
#include "cmdline.h"
#include "conf.h"
#include "path.h"
#include "mapper.h"
#include "playerData.h"
#include "pipe.h"
#include "decoder_thread.h"
#include "decoder_control.h"
#include "player_control.h"
#include "stats.h"
#include "sig_handlers.h"
#include "audio.h"
#include "volume.h"
#include "log.h"
#include "permission.h"
#include "replay_gain.h"
#include "decoder_list.h"
#include "input_stream.h"
#include "state_file.h"
#include "tag.h"
#include "dbUtils.h"
#include "../config.h"
#include "normalize.h"
#include "zeroconf.h"
#include "main_notify.h"
#include "os_compat.h"
#ifdef ENABLE_ARCHIVE
#include "archive_list.h"
#endif
#include <glib.h>
#ifdef HAVE_LOCALE
#include <locale.h>
#endif
/*
* from git-1.3.0, needed for solaris
*/
#ifndef HAVE_SETENV
static int setenv(const char *name, const char *value, int replace)
{
int out;
size_t namelen, valuelen;
char *envstr;
if (!name || !value)
return -1;
if (!replace) {
char *oldval = NULL;
oldval = getenv(name);
if (oldval)
return 0;
}
namelen = strlen(name);
valuelen = strlen(value);
envstr = xmalloc((namelen + valuelen + 2));
if (!envstr)
return -1;
memcpy(envstr, name, namelen);
envstr[namelen] = '=';
memcpy(envstr + namelen + 1, value, valuelen);
envstr[namelen + valuelen + 1] = 0;
out = putenv(envstr);
/* putenv(3) makes the argument string part of the environment,
* and changing that string modifies the environment --- which
* means we do not own that storage anymore. Do not free
* envstr.
*/
return out;
}
#endif /* HAVE_SETENV */
static void changeToUser(void)
{
ConfigParam *param = getConfigParam(CONF_USER);
if (param && strlen(param->value)) {
/* get uid */
struct passwd *userpwd;
if ((userpwd = getpwnam(param->value)) == NULL) {
FATAL("no such user \"%s\" at line %i\n", param->value,
param->line);
}
if (setgid(userpwd->pw_gid) == -1) {
FATAL("cannot setgid for user \"%s\" at line %i: %s\n",
param->value, param->line, strerror(errno));
}
#ifdef _BSD_SOURCE
/* init suplementary groups
* (must be done before we change our uid)
*/
if (initgroups(param->value, userpwd->pw_gid) == -1) {
WARNING("cannot init supplementary groups "
"of user \"%s\" at line %i: %s\n",
param->value, param->line, strerror(errno));
}
#endif
/* set uid */
if (setuid(userpwd->pw_uid) == -1) {
FATAL("cannot change to uid of user "
"\"%s\" at line %i: %s\n",
param->value, param->line, strerror(errno));
}
/* this is needed by libs such as arts */
if (userpwd->pw_dir) {
setenv("HOME", userpwd->pw_dir, 1);
}
}
}
static void openDB(Options * options, char *argv0)
{
if (options->createDB > 0 || db_load() < 0) {
if (options->createDB < 0) {
FATAL("can't open db file and using "
"\"--no-create-db\" command line option\n"
"try running \"%s --create-db\"\n", argv0);
}
if (db_check() < 0)
exit(EXIT_FAILURE);
db_init();
if (db_save() < 0)
exit(EXIT_FAILURE);
if (options->createDB)
exit(EXIT_SUCCESS);
}
}
static void daemonize(Options * options)
{
FILE *fp = NULL;
ConfigParam *pidFileParam = parseConfigFilePath(CONF_PID_FILE, 0);
if (pidFileParam) {
/* do this before daemon'izing so we can fail gracefully if we can't
* write to the pid file */
DEBUG("opening pid file\n");
fp = fopen(pidFileParam->value, "w+");
if (!fp) {
FATAL("could not open %s \"%s\" (at line %i) for writing: %s\n",
CONF_PID_FILE, pidFileParam->value,
pidFileParam->line, strerror(errno));
}
}
if (options->daemon) {
int pid;
fflush(NULL);
pid = fork();
if (pid > 0)
_exit(EXIT_SUCCESS);
else if (pid < 0) {
FATAL("problems fork'ing for daemon!\n");
}
if (chdir("/") < 0) {
FATAL("problems changing to root directory\n");
}
if (setsid() < 0) {
FATAL("problems setsid'ing\n");
}
fflush(NULL);
pid = fork();
if (pid > 0)
_exit(EXIT_SUCCESS);
else if (pid < 0) {
FATAL("problems fork'ing for daemon!\n");
}
DEBUG("daemonized!\n");
}
if (pidFileParam) {
DEBUG("writing pid file\n");
fprintf(fp, "%lu\n", (unsigned long)getpid());
fclose(fp);
}
}
static void cleanUpPidFile(void)
{
ConfigParam *pidFileParam = parseConfigFilePath(CONF_PID_FILE, 0);
if (!pidFileParam)
return;
DEBUG("cleaning up pid file\n");
unlink(pidFileParam->value);
}
static void killFromPidFile(void)
{
FILE *fp;
ConfigParam *pidFileParam = parseConfigFilePath(CONF_PID_FILE, 0);
int pid;
if (!pidFileParam) {
FATAL("no pid_file specified in the config file\n");
}
fp = fopen(pidFileParam->value, "r");
if (!fp) {
FATAL("unable to open %s \"%s\": %s\n",
CONF_PID_FILE, pidFileParam->value, strerror(errno));
}
if (fscanf(fp, "%i", &pid) != 1) {
FATAL("unable to read the pid from file \"%s\"\n",
pidFileParam->value);
}
fclose(fp);
if (kill(pid, SIGTERM)) {
FATAL("unable to kill proccess %i: %s\n", pid, strerror(errno));
}
exit(EXIT_SUCCESS);
}
int main(int argc, char *argv[])
{
Options options;
clock_t start;
GTimer *save_state_timer;
#ifdef HAVE_LOCALE
/* initialize locale */
setlocale(LC_CTYPE,"");
#endif
/* enable GLib's thread safety code */
g_thread_init(NULL);
idle_init();
initConf();
parseOptions(argc, argv, &options);
if (options.kill)
killFromPidFile();
initStats();
tag_lib_init();
log_init(options.verbose, options.stdOutput);
if (options.createDB <= 0)
listenOnPort();
changeToUser();
path_global_init();
mapper_init();
initPermissions();
initPlaylist();
#ifdef ENABLE_ARCHIVE
archive_plugin_init_all();
#endif
decoder_plugin_init_all();
update_global_init();
init_main_notify();
openDB(&options, argv[0]);
command_init();
initPlayerData();
pc_init(buffered_before_play);
music_pipe_init(buffered_chunks, &pc.notify);
dc_init();
initAudioConfig();
initAudioDriver();
initVolume();
client_manager_init();
replay_gain_global_init();
initNormalization();
input_stream_global_init();
daemonize(&options);
setup_log_output(options.stdOutput);
initSigHandlers();
initZeroconf();
openVolumeDevice();
decoder_thread_start();
player_create();
read_state_file();
save_state_timer = g_timer_new();
while (COMMAND_RETURN_KILL != client_manager_io() &&
COMMAND_RETURN_KILL != handlePendingSignals()) {
unsigned flags;
syncPlayerAndPlaylist();
client_manager_expire();
reap_update_task();
/* send "idle" notificaions to all subscribed
clients */
flags = idle_get();
if (flags != 0)
client_manager_idle_add(flags);
if (g_timer_elapsed(save_state_timer, NULL) >= 5 * 60) {
g_debug("Saving state file\n");
write_state_file();
g_timer_start(save_state_timer);
}
}
g_timer_destroy(save_state_timer);
write_state_file();
playerKill();
finishZeroconf();
client_manager_deinit();
closeAllListenSockets();
finishPlaylist();
start = clock();
db_finish();
DEBUG("db_finish took %f seconds\n",
((float)(clock()-start))/CLOCKS_PER_SEC);
deinit_main_notify();
input_stream_global_finish();
finishNormalization();
finishAudioDriver();
finishAudioConfig();
finishVolume();
mapper_finish();
path_global_finish();
finishPermissions();
dc_deinit();
pc_deinit();
command_finish();
update_global_finish();
decoder_plugin_deinit_all();
#ifdef ENABLE_ARCHIVE
archive_plugin_deinit_all();
#endif
music_pipe_free();
cleanUpPidFile();
finishConf();
idle_deinit();
close_log_files();
return EXIT_SUCCESS;
}