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