/* 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 "../config.h" #include "state_file.h" #include "conf.h" #include "gcc.h" #include "log.h" #include "audio.h" #include "playlist.h" #include "utils.h" #include "volume.h" #include <errno.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include <sys/stat.h> static struct _sf_cb { void (*reader)(FILE *); void (*writer)(FILE *); } sf_callbacks [] = { { read_sw_volume_state, save_sw_volume_state }, { readAudioDevicesState, saveAudioDevicesState }, { readPlaylistState, savePlaylistState }, }; static const char *sfpath; static void get_state_file_path(void) { ConfigParam *param; if (sfpath) return; param = parseConfigFilePath(CONF_STATE_FILE, 0); if (param) sfpath = (const char *)param->value; } void write_state_file(void) { int i; FILE *fp; if (!sfpath) return; while (!(fp = fopen(sfpath, "w")) && errno == EINTR); if (mpd_unlikely(!fp)) { ERROR("problems opening state file \"%s\" for writing: %s\n", sfpath, strerror(errno)); return; } for (i = 0; i < ARRAY_SIZE(sf_callbacks); i++) sf_callbacks[i].writer(fp); while(fclose(fp) && errno == EINTR) /* nothing */; } void read_state_file(void) { struct stat st; int i; FILE *fp; get_state_file_path(); if (!sfpath) return; if (stat(sfpath, &st) < 0) { DEBUG("failed to stat state file: %s\n", sfpath); return; } if (!S_ISREG(st.st_mode)) FATAL("state file \"%s\" is not a regular file\n", sfpath); while (!(fp = fopen(sfpath, "r")) && errno == EINTR); if (mpd_unlikely(!fp)) { FATAL("problems opening state file \"%s\" for reading: %s\n", sfpath, strerror(errno)); } for (i = 0; i < ARRAY_SIZE(sf_callbacks); i++) { sf_callbacks[i].reader(fp); rewind(fp); } while(fclose(fp) && errno == EINTR) /* nothing */; } void mpd_noreturn state_file_fatal(void) { FATAL("error parsing state file \"%s\"\n", sfpath); }