glusterfs

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/*
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  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
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  This file is part of GlusterFS.
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  This file is licensed to you under your choice of the GNU Lesser
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  General Public License, version 3 or any later version (LGPLv3 or
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  later), or the GNU General Public License, version 2 (GPLv2), in all
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  cases as published by the Free Software Foundation.
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include "glusterfs/daemon.h"
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int
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os_daemon_return(int nochdir, int noclose)
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{
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    pid_t pid = -1;
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    int ret = -1;
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    FILE *ptr = NULL;
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    ret = fork();
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    if (ret)
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        return ret;
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    pid = setsid();
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    if (pid == -1) {
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        ret = -1;
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        goto out;
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    }
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    if (!nochdir)
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        ret = chdir("/");
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    if (!noclose) {
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        ptr = freopen(DEVNULLPATH, "r", stdin);
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        if (!ptr)
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            goto out;
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        ptr = freopen(DEVNULLPATH, "w", stdout);
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        if (!ptr)
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            goto out;
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        ptr = freopen(DEVNULLPATH, "w", stderr);
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        if (!ptr)
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            goto out;
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    }
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    ret = 0;
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out:
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    return ret;
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}
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int
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os_daemon(int nochdir, int noclose)
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{
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    int ret = -1;
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    ret = os_daemon_return(nochdir, noclose);
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    if (ret <= 0)
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        return ret;
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    _exit(0);
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}
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