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-rw-r--r--src/daemon.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/src/daemon.c b/src/daemon.c
new file mode 100644
index 000000000..09cd5721a
--- /dev/null
+++ b/src/daemon.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2003-2008 The Music Player Daemon Project
+ * 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 "daemon.h"
+#include "conf.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+
+void
+daemonize(Options *options)
+{
+#ifndef WIN32
+ 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 */
+ g_debug("opening pid file");
+ fp = fopen(pidFileParam->value, "w+");
+ if (!fp) {
+ g_error("could not open %s \"%s\" (at line %i) for writing: %s",
+ 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) {
+ g_error("problems fork'ing for daemon!");
+ }
+
+ if (chdir("/") < 0) {
+ g_error("problems changing to root directory");
+ }
+
+ if (setsid() < 0) {
+ g_error("problems setsid'ing");
+ }
+
+ fflush(NULL);
+ pid = fork();
+ if (pid > 0)
+ _exit(EXIT_SUCCESS);
+ else if (pid < 0) {
+ g_error("problems fork'ing for daemon!");
+ }
+
+ g_debug("daemonized!");
+ }
+
+ if (pidFileParam) {
+ g_debug("writing pid file");
+ fprintf(fp, "%lu\n", (unsigned long)getpid());
+ fclose(fp);
+ }
+#else
+ /* no daemonization on WIN32 */
+ (void)options;
+#endif
+}