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/* the Music Player Daemon (MPD)
* (c)2003-2006 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 <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 [] = {
{ readAudioDevicesState, saveAudioDevicesState },
{ readPlaylistState, savePlaylistState },
};
static const char *sfpath = NULL;
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)) {
ERROR("state file \"%s\" is not a regular file\n", sfpath);
exit(EXIT_FAILURE);
}
while (!(fp = fopen(sfpath, "r")) && errno == EINTR);
if (mpd_unlikely(!fp)) {
ERROR("problems opening state file \"%s\" for reading: %s\n",
sfpath, strerror(errno));
exit(EXIT_FAILURE);
}
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)
{
ERROR("error parsing state file \"%s\"\n", sfpath);
exit(EXIT_FAILURE);
}
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