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