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/*
* Copyright (C) 2011 Davide Cavalca <davide@geexbox.org>
*
* Based on http://cgit.freedesktop.org/systemd/tree/src/sd-daemon.c
* Copyright 2010 Lennart Poettering
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "libbb.h"
//config:config FEATURE_SYSTEMD
//config: bool "Enable systemd support"
//config: default y
//config: help
//config: If you plan to use busybox daemons on a system where daemons
//config: are controlled by systemd, enable this option.
//config: If you don't use systemd, it is still safe to enable it,
//config: but the downside is increased code size.
//kbuild:lib-$(CONFIG_FEATURE_SYSTEMD) += systemd_support.o
int sd_listen_fds(void)
{
const char *e;
int n;
int fd;
e = getenv("LISTEN_PID");
if (!e)
return 0;
n = xatoi_positive(e);
/* Is this for us? */
if (getpid() != (pid_t) n)
return 0;
e = getenv("LISTEN_FDS");
if (!e)
return 0;
n = xatoi_positive(e);
for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++)
close_on_exec_on(fd);
return n;
}
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