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-rw-r--r--trunk/src/main.c482
1 files changed, 482 insertions, 0 deletions
diff --git a/trunk/src/main.c b/trunk/src/main.c
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+/* 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 "interface.h"
+#include "command.h"
+#include "playlist.h"
+#include "directory.h"
+#include "player.h"
+#include "listen.h"
+#include "conf.h"
+#include "path.h"
+#include "playerData.h"
+#include "stats.h"
+#include "sig_handlers.h"
+#include "audio.h"
+#include "volume.h"
+#include "log.h"
+#include "permission.h"
+#include "replayGain.h"
+#include "inputPlugin.h"
+#include "audioOutput.h"
+#include "inputStream.h"
+#include "state_file.h"
+#include "tag.h"
+#include "tagTracker.h"
+#include "dbUtils.h"
+#include "../config.h"
+#include "utils.h"
+#include "normalize.h"
+#include "zeroconf.h"
+
+#include <stdio.h>
+#include <sys/select.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <pwd.h>
+#include <grp.h>
+#include <time.h>
+#include <unistd.h>
+
+#define SYSTEM_CONFIG_FILE_LOCATION "/etc/mpd.conf"
+#define USER_CONFIG_FILE_LOCATION "/.mpdconf"
+
+typedef struct _Options {
+ int kill;
+ int daemon;
+ int stdOutput;
+ int createDB;
+ int verbose;
+} Options;
+
+/*
+ * 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 usage(char *argv[])
+{
+ ERROR("usage:\n");
+ ERROR(" %s [options] <conf file>\n", argv[0]);
+ ERROR(" %s [options] (searches for ~%s then %s)\n",
+ argv[0], USER_CONFIG_FILE_LOCATION, SYSTEM_CONFIG_FILE_LOCATION);
+ ERROR("\n");
+ ERROR("options:\n");
+ ERROR(" --help this usage statement\n");
+ ERROR(" --kill kill the currently running mpd session\n");
+ ERROR
+ (" --create-db force (re)creation of database and exit\n");
+ ERROR
+ (" --no-create-db don't create database, even if it doesn't exist\n");
+ ERROR(" --no-daemon don't detach from console\n");
+ ERROR(" --stdout print messages to stdout and stderr\n");
+ ERROR(" --verbose verbose logging\n");
+ ERROR(" --version prints version information\n");
+}
+
+static void version(void)
+{
+ LOG("mpd (MPD: Music Player Daemon) %s\n", VERSION);
+ LOG("\n");
+ LOG("Copyright (C) 2003-2007 Warren Dukes <warren.dukes@gmail.com>\n");
+ LOG("This is free software; see the source for copying conditions. There is NO\n");
+ LOG("warranty; not even MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
+ LOG("\n");
+ LOG("Supported formats:\n");
+
+ initInputPlugins();
+ printAllInputPluginSuffixes(stdout);
+
+ LOG("\n");
+ LOG("Supported outputs:\n");
+ loadAudioDrivers();
+ printAllOutputPluginTypes(stdout);
+}
+
+static void parseOptions(int argc, char **argv, Options * options)
+{
+ int argcLeft = argc;
+
+ options->verbose = 0;
+ options->daemon = 1;
+ options->stdOutput = 0;
+ options->createDB = 0;
+ options->kill = 0;
+
+ if (argc > 1) {
+ int i = 1;
+ while (i < argc) {
+ if (strncmp(argv[i], "--", 2) == 0) {
+ if (strcmp(argv[i], "--help") == 0) {
+ usage(argv);
+ exit(EXIT_SUCCESS);
+ } else if (strcmp(argv[i], "--kill") == 0) {
+ options->kill++;
+ argcLeft--;
+ } else if (strcmp(argv[i], "--no-daemon") == 0) {
+ options->daemon = 0;
+ argcLeft--;
+ } else if (strcmp(argv[i], "--stdout") == 0) {
+ options->stdOutput = 1;
+ argcLeft--;
+ } else if (strcmp(argv[i], "--create-db") == 0) {
+ options->stdOutput = 1;
+ options->createDB = 1;
+ argcLeft--;
+ } else if (strcmp(argv[i], "--no-create-db") ==
+ 0) {
+ options->createDB = -1;
+ argcLeft--;
+ } else if (strcmp(argv[i], "--verbose") == 0) {
+ options->verbose = 1;
+ argcLeft--;
+ } else if (strcmp(argv[i], "--version") == 0) {
+ version();
+ exit(EXIT_SUCCESS);
+ } else {
+ fprintf(stderr,
+ "unknown command line option: %s\n",
+ argv[i]);
+ exit(EXIT_FAILURE);
+ }
+ } else
+ break;
+ i++;
+ }
+ }
+
+ if (argcLeft <= 2) {
+ if (argcLeft == 2) {
+ readConf(argv[argc - 1]);
+ return;
+ } else if (argcLeft == 1) {
+ struct stat st;
+ char *homedir = getenv("HOME");
+ char userfile[MAXPATHLEN + 1] = "";
+ if (homedir && (strlen(homedir) +
+ strlen(USER_CONFIG_FILE_LOCATION)) <
+ MAXPATHLEN) {
+ strcpy(userfile, homedir);
+ strcat(userfile, USER_CONFIG_FILE_LOCATION);
+ }
+ if (strlen(userfile) && (0 == stat(userfile, &st))) {
+ readConf(userfile);
+ return;
+ } else if (0 == stat(SYSTEM_CONFIG_FILE_LOCATION, &st)) {
+ readConf(SYSTEM_CONFIG_FILE_LOCATION);
+ return;
+ }
+ }
+ }
+
+ usage(argv);
+ exit(EXIT_FAILURE);
+}
+
+static void closeAllFDs(void)
+{
+ int i;
+ int fds = getdtablesize();
+
+ for (i = 3; i < fds; i++)
+ close(i);
+}
+
+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 || readDirectoryDB() < 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);
+ }
+ flushWarningLog();
+ if (checkDirectoryDB() < 0)
+ exit(EXIT_FAILURE);
+ initMp3Directory();
+ if (writeDirectoryDB() < 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(char *cmd, int killOption)
+{
+ 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;
+
+ closeAllFDs();
+
+ initConf();
+
+ parseOptions(argc, argv, &options);
+
+ if (options.kill)
+ killFromPidFile(argv[0], options.kill);
+
+ initStats();
+ initTagConfig();
+ initLog(options.verbose);
+
+ if (options.createDB <= 0)
+ listenOnPort();
+
+ changeToUser();
+
+ open_log_files(options.stdOutput);
+
+ initPaths();
+ initPermissions();
+ initPlaylist();
+ initInputPlugins();
+
+ openDB(&options, argv[0]);
+
+ initCommands();
+ initPlayerData();
+ initAudioConfig();
+ initAudioDriver();
+ initVolume();
+ initInterfaces();
+ initZeroconf();
+ initReplayGainState();
+ initNormalization();
+ initInputStream();
+
+ daemonize(&options);
+
+ setup_log_output(options.stdOutput);
+
+
+
+ initSigHandlers();
+
+ openVolumeDevice();
+ read_state_file();
+
+ while (COMMAND_RETURN_KILL != doIOForInterfaces()) {
+ if (COMMAND_RETURN_KILL == handlePendingSignals())
+ break;
+ syncPlayerAndPlaylist();
+ closeOldInterfaces();
+ readDirectoryDBIfUpdateIsFinished();
+ }
+
+ write_state_file();
+ playerKill();
+ finishZeroconf();
+ freeAllInterfaces();
+ closeAllListenSockets();
+ finishPlaylist();
+
+ start = clock();
+ closeMp3Directory();
+ DEBUG("closeMp3Directory took %f seconds\n",
+ ((float)(clock()-start))/CLOCKS_PER_SEC);
+
+ finishNormalization();
+ finishAudioDriver();
+ finishAudioConfig();
+ finishVolume();
+ finishPaths();
+ finishPermissions();
+ finishCommands();
+ finishInputPlugins();
+ cleanUpPidFile();
+ finishConf();
+ freePlayerData();
+
+ close_log_files();
+ return EXIT_SUCCESS;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 19:33:37 +0000