IEEE 802.15.4 subsystem
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Source at commit 624caeb00652f6118dc64698b7dad6fa3e5bdcc2 created 7 years 6 days ago. By Werner Almesberger, atusb/: use VR, POWERED, and LED from kicad-libs | |
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1 | /* |
2 | * lib/daemon.c - Helper functions for proper daemonification |
3 | * |
4 | * Written 2011 by Werner Almesberger |
5 | * Copyright 2011 Werner Almesberger |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify |
8 | * it under the terms of the GNU General Public License as published by |
9 | * the Free Software Foundation; either version 2 of the License, or |
10 | * (at your option) any later version. |
11 | */ |
12 | |
13 | |
14 | #include <stdlib.h> |
15 | #include <stdio.h> |
16 | #include <unistd.h> |
17 | |
18 | #include "daemon.h" |
19 | |
20 | |
21 | pid_t daemonize(void) |
22 | { |
23 | pid_t pid; |
24 | int i; |
25 | |
26 | pid = fork(); |
27 | if (pid < 0) { |
28 | perror("fork"); |
29 | exit(1); |
30 | } |
31 | if (pid) |
32 | return pid; |
33 | if (setsid() < 0) { |
34 | perror("setsid"); |
35 | exit(1); |
36 | } |
37 | for (i = 0; i <= 2; i++) |
38 | (void) close(i); |
39 | (void) chdir("/"); |
40 | return 0; |
41 | } |
42 |