Contents of /tags/mkinitrd-6_1_1/busybox/miscutils/setsid.c
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Mon May 4 16:31:54 2009 UTC (15 years, 4 months ago) by niro
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Mon May 4 16:31:54 2009 UTC (15 years, 4 months ago) by niro
File MIME type: text/plain
File size: 913 byte(s)
tagged 'mkinitrd-6_1_1'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * setsid.c -- execute a command in a new session |
4 | * Rick Sladkey <jrs@world.std.com> |
5 | * In the public domain. |
6 | * |
7 | * 1999-02-22 Arkadiusz Mickiewicz <misiek@pld.ORG.PL> |
8 | * - added Native Language Support |
9 | * |
10 | * 2001-01-18 John Fremlin <vii@penguinpowered.com> |
11 | * - fork in case we are process group leader |
12 | * |
13 | * 2004-11-12 Paul Fox |
14 | * - busyboxed |
15 | */ |
16 | |
17 | #include "libbb.h" |
18 | |
19 | int setsid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
20 | int setsid_main(int argc UNUSED_PARAM, char **argv) |
21 | { |
22 | if (!argv[1]) |
23 | bb_show_usage(); |
24 | |
25 | /* setsid() is allowed only when we are not a process group leader. |
26 | * Otherwise our PID serves as PGID of some existing process group |
27 | * and cannot be used as PGID of a new process group. */ |
28 | if (getpgrp() == getpid()) |
29 | forkexit_or_rexec(argv); |
30 | |
31 | setsid(); /* no error possible */ |
32 | |
33 | BB_EXECVP(argv[1], argv + 1); |
34 | bb_simple_perror_msg_and_die(argv[1]); |
35 | } |