blob: 542a3efffc6f24b81668ea34b352830f2cd73abb
| 1 | /* |
| 2 | * Copyright (C) 2011 Davide Cavalca <davide@geexbox.org> |
| 3 | * |
| 4 | * Based on http://cgit.freedesktop.org/systemd/tree/src/sd-daemon.c |
| 5 | * Copyright 2010 Lennart Poettering |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, to any person |
| 8 | * obtaining a copy of this software and associated documentation files |
| 9 | * (the "Software"), to deal in the Software without restriction, |
| 10 | * including without limitation the rights to use, copy, modify, merge, |
| 11 | * publish, distribute, sublicense, and/or sell copies of the Software, |
| 12 | * and to permit persons to whom the Software is furnished to do so, |
| 13 | * subject to the following conditions: |
| 14 | * |
| 15 | * The above copyright notice and this permission notice shall be |
| 16 | * included in all copies or substantial portions of the Software. |
| 17 | * |
| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 19 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 20 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 21 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 22 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 23 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 24 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 25 | * SOFTWARE. |
| 26 | */ |
| 27 | #include "libbb.h" |
| 28 | |
| 29 | //config:config FEATURE_SYSTEMD |
| 30 | //config: bool "Enable systemd support" |
| 31 | //config: default y |
| 32 | //config: help |
| 33 | //config: If you plan to use busybox daemons on a system where daemons |
| 34 | //config: are controlled by systemd, enable this option. |
| 35 | //config: If you don't use systemd, it is still safe to enable it, |
| 36 | //config: but the downside is increased code size. |
| 37 | |
| 38 | //kbuild:lib-$(CONFIG_FEATURE_SYSTEMD) += systemd_support.o |
| 39 | |
| 40 | int sd_listen_fds(void) |
| 41 | { |
| 42 | const char *e; |
| 43 | int n; |
| 44 | int fd; |
| 45 | |
| 46 | e = getenv("LISTEN_PID"); |
| 47 | if (!e) |
| 48 | return 0; |
| 49 | n = xatoi_positive(e); |
| 50 | /* Is this for us? */ |
| 51 | if (getpid() != (pid_t) n) |
| 52 | return 0; |
| 53 | |
| 54 | e = getenv("LISTEN_FDS"); |
| 55 | if (!e) |
| 56 | return 0; |
| 57 | n = xatoi_positive(e); |
| 58 | for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) |
| 59 | close_on_exec_on(fd); |
| 60 | |
| 61 | return n; |
| 62 | } |
| 63 |