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/* 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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* Copyright (C) 2003-2009 The Music Player Daemon Project
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* http://www.musicpd.org
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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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* 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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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#include "../config.h"
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#include "state_file.h"
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#include "output_state.h"
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#include "playlist.h"
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#include "volume.h"
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#include <string.h>
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#define G_LOG_DOMAIN "state_file"
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static struct _sf_cb {
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void (*reader)(FILE *);
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{ readPlaylistState, savePlaylistState },
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static const char *sfpath;
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static void get_state_file_path(void)
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param = parseConfigFilePath(CONF_STATE_FILE, 0);
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sfpath = (const char *)param->value;
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void write_state_file(void)
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static char *state_file_path;
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/** the GLib source id for the save timer */
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static guint save_state_source_id;
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state_file_write(void)
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if (state_file_path == NULL)
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fp = fopen(sfpath, "w");
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fp = fopen(state_file_path, "w");
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if (G_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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g_warning("failed to create %s: %s",
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state_file_path, strerror(errno));
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for (i = 0; i < ARRAY_SIZE(sf_callbacks); i++)
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for (i = 0; i < G_N_ELEMENTS(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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void read_state_file(void)
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get_state_file_path();
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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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if (!S_ISREG(st.st_mode))
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FATAL("state file \"%s\" is not a regular file\n", sfpath);
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while (!(fp = fopen(sfpath, "r")) && errno == EINTR);
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assert(state_file_path != NULL);
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g_debug("Saving state file");
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fp = fopen(state_file_path, "r");
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if (G_UNLIKELY(!fp)) {
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FATAL("problems opening state file \"%s\" for reading: %s\n",
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sfpath, strerror(errno));
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g_warning("failed to open %s: %s",
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state_file_path, strerror(errno));
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for (i = 0; i < ARRAY_SIZE(sf_callbacks); i++) {
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for (i = 0; i < G_N_ELEMENTS(sf_callbacks); i++) {
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sf_callbacks[i].reader(fp);
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while(fclose(fp) && errno == EINTR) /* nothing */;
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void G_GNUC_NORETURN state_file_fatal(void)
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FATAL("error parsing state file \"%s\"\n", sfpath);
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* This function is called every 5 minutes by the GLib main loop, and
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* saves the state file.
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timer_save_state_file(G_GNUC_UNUSED gpointer data)
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state_file_init(const char *path)
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assert(state_file_path == NULL);
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state_file_path = g_strdup(path);
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save_state_source_id = g_timeout_add(5 * 60 * 1000,
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timer_save_state_file, NULL);
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state_file_finish(void)
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if (save_state_source_id != 0)
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g_source_remove(save_state_source_id);
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if (state_file_path != NULL)
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g_free(state_file_path);
added
removed
src/state_file.c
