87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
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/*
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* Copyright (C) 2003-2008 The Music Player Daemon Project
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* 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 "daemon.h"
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#include "conf.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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void
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daemonize(Options *options)
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{
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#ifndef WIN32
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FILE *fp = NULL;
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ConfigParam *pidFileParam = parseConfigFilePath(CONF_PID_FILE, 0);
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if (pidFileParam) {
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/* do this before daemon'izing so we can fail gracefully if we can't
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* write to the pid file */
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g_debug("opening pid file");
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fp = fopen(pidFileParam->value, "w+");
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if (!fp) {
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g_error("could not open %s \"%s\" (at line %i) for writing: %s",
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CONF_PID_FILE, pidFileParam->value,
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pidFileParam->line, strerror(errno));
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}
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}
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if (options->daemon) {
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int pid;
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fflush(NULL);
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pid = fork();
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if (pid > 0)
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_exit(EXIT_SUCCESS);
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else if (pid < 0) {
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g_error("problems fork'ing for daemon!");
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}
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if (chdir("/") < 0) {
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g_error("problems changing to root directory");
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}
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if (setsid() < 0) {
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g_error("problems setsid'ing");
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}
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fflush(NULL);
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pid = fork();
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if (pid > 0)
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_exit(EXIT_SUCCESS);
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else if (pid < 0) {
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g_error("problems fork'ing for daemon!");
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}
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g_debug("daemonized!");
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}
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if (pidFileParam) {
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g_debug("writing pid file");
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fprintf(fp, "%lu\n", (unsigned long)getpid());
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fclose(fp);
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}
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#else
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/* no daemonization on WIN32 */
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(void)options;
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#endif
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}
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