dff8c6450b
It should be obvious in which thread or context a function is being executed at runtime. The code which was left in decode.c is for the decoder thread itself; give the file a better name.
473 lines
11 KiB
C
473 lines
11 KiB
C
/* the Music Player Daemon (MPD)
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* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
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* This project's homepage is: http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "interface.h"
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#include "command.h"
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#include "playlist.h"
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#include "directory.h"
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#include "player_thread.h"
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#include "listen.h"
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#include "conf.h"
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#include "path.h"
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#include "playerData.h"
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#include "decoder_thread.h"
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#include "player.h"
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#include "stats.h"
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#include "sig_handlers.h"
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#include "audio.h"
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#include "volume.h"
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#include "log.h"
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#include "permission.h"
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#include "replayGain.h"
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#include "decoder_list.h"
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#include "audioOutput.h"
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#include "inputStream.h"
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#include "state_file.h"
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#include "tag.h"
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#include "tagTracker.h"
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#include "dbUtils.h"
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#include "../config.h"
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#include "utils.h"
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#include "normalize.h"
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#include "zeroconf.h"
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#include "main_notify.h"
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#include "os_compat.h"
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#define SYSTEM_CONFIG_FILE_LOCATION "/etc/mpd.conf"
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#define USER_CONFIG_FILE_LOCATION "/.mpdconf"
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typedef struct _Options {
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int kill;
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int daemon;
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int stdOutput;
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int createDB;
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int verbose;
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} Options;
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/*
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* from git-1.3.0, needed for solaris
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*/
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#ifndef HAVE_SETENV
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static int setenv(const char *name, const char *value, int replace)
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{
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int out;
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size_t namelen, valuelen;
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char *envstr;
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if (!name || !value)
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return -1;
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if (!replace) {
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char *oldval = NULL;
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oldval = getenv(name);
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if (oldval)
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return 0;
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}
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namelen = strlen(name);
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valuelen = strlen(value);
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envstr = xmalloc((namelen + valuelen + 2));
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if (!envstr)
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return -1;
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memcpy(envstr, name, namelen);
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envstr[namelen] = '=';
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memcpy(envstr + namelen + 1, value, valuelen);
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envstr[namelen + valuelen + 1] = 0;
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out = putenv(envstr);
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/* putenv(3) makes the argument string part of the environment,
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* and changing that string modifies the environment --- which
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* means we do not own that storage anymore. Do not free
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* envstr.
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*/
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return out;
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}
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#endif /* HAVE_SETENV */
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static void usage(char *argv[])
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{
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ERROR("usage:\n");
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ERROR(" %s [options] <conf file>\n", argv[0]);
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ERROR(" %s [options] (searches for ~%s then %s)\n",
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argv[0], USER_CONFIG_FILE_LOCATION, SYSTEM_CONFIG_FILE_LOCATION);
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ERROR("\n");
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ERROR("options:\n");
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ERROR(" --help this usage statement\n");
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ERROR(" --kill kill the currently running mpd session\n");
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ERROR
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(" --create-db force (re)creation of database and exit\n");
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ERROR
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(" --no-create-db don't create database, even if it doesn't exist\n");
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ERROR(" --no-daemon don't detach from console\n");
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ERROR(" --stdout print messages to stdout and stderr\n");
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ERROR(" --verbose verbose logging\n");
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ERROR(" --version prints version information\n");
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}
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static void version(void)
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{
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LOG("mpd (MPD: Music Player Daemon) %s\n", VERSION);
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LOG("\n");
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LOG("Copyright (C) 2003-2007 Warren Dukes <warren.dukes@gmail.com>\n");
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LOG("This is free software; see the source for copying conditions. There is NO\n");
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LOG("warranty; not even MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
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LOG("\n");
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LOG("Supported formats:\n");
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decoder_plugin_init_all();
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decoder_plugin_print_all_suffixes(stdout);
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LOG("\n");
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LOG("Supported outputs:\n");
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loadAudioDrivers();
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printAllOutputPluginTypes(stdout);
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}
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static void parseOptions(int argc, char **argv, Options * options)
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{
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int argcLeft = argc;
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options->verbose = 0;
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options->daemon = 1;
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options->stdOutput = 0;
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options->createDB = 0;
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options->kill = 0;
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if (argc > 1) {
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int i = 1;
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while (i < argc) {
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if (strncmp(argv[i], "--", 2) == 0) {
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if (strcmp(argv[i], "--help") == 0) {
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usage(argv);
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exit(EXIT_SUCCESS);
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} else if (strcmp(argv[i], "--kill") == 0) {
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options->kill++;
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argcLeft--;
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} else if (strcmp(argv[i], "--no-daemon") == 0) {
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options->daemon = 0;
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argcLeft--;
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} else if (strcmp(argv[i], "--stdout") == 0) {
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options->stdOutput = 1;
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argcLeft--;
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} else if (strcmp(argv[i], "--create-db") == 0) {
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options->stdOutput = 1;
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options->createDB = 1;
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argcLeft--;
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} else if (strcmp(argv[i], "--no-create-db") ==
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0) {
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options->createDB = -1;
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argcLeft--;
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} else if (strcmp(argv[i], "--verbose") == 0) {
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options->verbose = 1;
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argcLeft--;
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} else if (strcmp(argv[i], "--version") == 0) {
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version();
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exit(EXIT_SUCCESS);
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} else {
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fprintf(stderr,
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"unknown command line option: %s\n",
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argv[i]);
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exit(EXIT_FAILURE);
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}
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} else
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break;
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i++;
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}
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}
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if (argcLeft <= 2) {
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if (argcLeft == 2) {
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readConf(argv[argc - 1]);
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return;
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} else if (argcLeft == 1) {
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struct stat st;
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char *homedir = getenv("HOME");
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char userfile[MPD_PATH_MAX] = "";
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if (homedir && (strlen(homedir) +
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strlen(USER_CONFIG_FILE_LOCATION)) <
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MPD_PATH_MAX) {
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strcpy(userfile, homedir);
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strcat(userfile, USER_CONFIG_FILE_LOCATION);
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}
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if (strlen(userfile) && (0 == stat(userfile, &st))) {
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readConf(userfile);
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return;
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} else if (0 == stat(SYSTEM_CONFIG_FILE_LOCATION, &st)) {
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readConf(SYSTEM_CONFIG_FILE_LOCATION);
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return;
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}
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}
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}
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usage(argv);
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exit(EXIT_FAILURE);
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}
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static void closeAllFDs(void)
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{
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int i;
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int fds = getdtablesize();
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for (i = 3; i < fds; i++)
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close(i);
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}
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static void changeToUser(void)
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{
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ConfigParam *param = getConfigParam(CONF_USER);
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if (param && strlen(param->value)) {
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/* get uid */
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struct passwd *userpwd;
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if ((userpwd = getpwnam(param->value)) == NULL) {
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FATAL("no such user \"%s\" at line %i\n", param->value,
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param->line);
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}
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if (setgid(userpwd->pw_gid) == -1) {
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FATAL("cannot setgid for user \"%s\" at line %i: %s\n",
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param->value, param->line, strerror(errno));
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}
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#ifdef _BSD_SOURCE
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/* init suplementary groups
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* (must be done before we change our uid)
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*/
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if (initgroups(param->value, userpwd->pw_gid) == -1) {
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WARNING("cannot init supplementary groups "
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"of user \"%s\" at line %i: %s\n",
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param->value, param->line, strerror(errno));
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}
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#endif
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/* set uid */
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if (setuid(userpwd->pw_uid) == -1) {
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FATAL("cannot change to uid of user "
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"\"%s\" at line %i: %s\n",
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param->value, param->line, strerror(errno));
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}
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/* this is needed by libs such as arts */
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if (userpwd->pw_dir) {
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setenv("HOME", userpwd->pw_dir, 1);
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}
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}
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}
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static void openDB(Options * options, char *argv0)
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{
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if (options->createDB > 0 || readDirectoryDB() < 0) {
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if (options->createDB < 0) {
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FATAL("can't open db file and using "
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"\"--no-create-db\" command line option\n"
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"try running \"%s --create-db\"\n", argv0);
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}
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flushWarningLog();
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if (checkDirectoryDB() < 0)
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exit(EXIT_FAILURE);
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initMp3Directory();
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if (writeDirectoryDB() < 0)
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exit(EXIT_FAILURE);
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if (options->createDB)
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exit(EXIT_SUCCESS);
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}
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}
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static void daemonize(Options * options)
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{
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FILE *fp = NULL;
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ConfigParam *pidFileParam = parseConfigFilePath(CONF_PID_FILE, 0);
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if (pidFileParam) {
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/* do this before daemon'izing so we can fail gracefully if we can't
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* write to the pid file */
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DEBUG("opening pid file\n");
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fp = fopen(pidFileParam->value, "w+");
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if (!fp) {
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FATAL("could not open %s \"%s\" (at line %i) for writing: %s\n",
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CONF_PID_FILE, pidFileParam->value,
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pidFileParam->line, strerror(errno));
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}
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}
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if (options->daemon) {
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int pid;
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fflush(NULL);
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pid = fork();
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if (pid > 0)
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_exit(EXIT_SUCCESS);
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else if (pid < 0) {
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FATAL("problems fork'ing for daemon!\n");
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}
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if (chdir("/") < 0) {
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FATAL("problems changing to root directory\n");
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}
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if (setsid() < 0) {
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FATAL("problems setsid'ing\n");
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}
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fflush(NULL);
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pid = fork();
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if (pid > 0)
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_exit(EXIT_SUCCESS);
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else if (pid < 0) {
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FATAL("problems fork'ing for daemon!\n");
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}
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DEBUG("daemonized!\n");
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}
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if (pidFileParam) {
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DEBUG("writing pid file\n");
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fprintf(fp, "%lu\n", (unsigned long)getpid());
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fclose(fp);
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}
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}
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static void cleanUpPidFile(void)
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{
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ConfigParam *pidFileParam = parseConfigFilePath(CONF_PID_FILE, 0);
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if (!pidFileParam)
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return;
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DEBUG("cleaning up pid file\n");
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unlink(pidFileParam->value);
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}
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static void killFromPidFile(void)
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{
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FILE *fp;
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ConfigParam *pidFileParam = parseConfigFilePath(CONF_PID_FILE, 0);
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int pid;
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if (!pidFileParam) {
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FATAL("no pid_file specified in the config file\n");
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}
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fp = fopen(pidFileParam->value, "r");
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if (!fp) {
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FATAL("unable to open %s \"%s\": %s\n",
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CONF_PID_FILE, pidFileParam->value, strerror(errno));
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}
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if (fscanf(fp, "%i", &pid) != 1) {
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FATAL("unable to read the pid from file \"%s\"\n",
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pidFileParam->value);
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}
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fclose(fp);
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if (kill(pid, SIGTERM)) {
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FATAL("unable to kill proccess %i: %s\n", pid, strerror(errno));
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}
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exit(EXIT_SUCCESS);
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}
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int main(int argc, char *argv[])
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{
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Options options;
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clock_t start;
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closeAllFDs();
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initConf();
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parseOptions(argc, argv, &options);
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if (options.kill)
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killFromPidFile();
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initStats();
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initTagConfig();
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initLog(options.verbose);
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if (options.createDB <= 0)
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listenOnPort();
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changeToUser();
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open_log_files(options.stdOutput);
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initPaths();
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initPermissions();
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initPlaylist();
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decoder_plugin_init_all();
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openDB(&options, argv[0]);
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initCommands();
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initPlayerData();
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initAudioConfig();
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initAudioDriver();
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initVolume();
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initInterfaces();
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initReplayGainState();
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initNormalization();
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initInputStream();
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daemonize(&options);
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init_main_notify();
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setup_log_output(options.stdOutput);
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initSigHandlers();
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initZeroconf();
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openVolumeDevice();
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decoderInit();
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player_create();
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read_state_file();
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while (COMMAND_RETURN_KILL != doIOForInterfaces() &&
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COMMAND_RETURN_KILL != handlePendingSignals()) {
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syncPlayerAndPlaylist();
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closeOldInterfaces();
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readDirectoryDBIfUpdateIsFinished();
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}
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write_state_file();
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playerKill();
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finishZeroconf();
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freeAllInterfaces();
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closeAllListenSockets();
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finishPlaylist();
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start = clock();
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closeMp3Directory();
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DEBUG("closeMp3Directory took %f seconds\n",
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((float)(clock()-start))/CLOCKS_PER_SEC);
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finishNormalization();
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finishAudioDriver();
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finishAudioConfig();
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finishVolume();
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finishPaths();
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finishPermissions();
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finishCommands();
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decoder_plugin_deinit_all();
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cleanUpPidFile();
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finishConf();
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close_log_files();
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return EXIT_SUCCESS;
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}
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