Last change
on this file since 3735 was 3320, checked in by Bruno Cornec, 10 years ago |
- Re-add (thanks git BTW) the 2.2.9 branch which had been destroyed in
the move to 3.0
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-
Property svn:eol-style
set to
native
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File size:
1.2 KB
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Rev | Line | |
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[3320] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * setsid.c -- execute a command in a new session
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| 4 | * Rick Sladkey <jrs@world.std.com>
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| 5 | * In the public domain.
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| 6 | *
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| 7 | * 1999-02-22 Arkadiusz Mickiewicz <misiek@pld.ORG.PL>
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| 8 | * - added Native Language Support
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| 9 | *
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| 10 | * 2001-01-18 John Fremlin <vii@penguinpowered.com>
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| 11 | * - fork in case we are process group leader
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| 12 | *
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| 13 | * 2004-11-12 Paul Fox
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| 14 | * - busyboxed
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| 15 | */
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| 16 |
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| 17 | #include "libbb.h"
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| 18 |
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| 19 | int setsid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 20 | int setsid_main(int argc UNUSED_PARAM, char **argv)
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| 21 | {
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| 22 | if (!argv[1])
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| 23 | bb_show_usage();
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| 24 |
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| 25 | /* setsid() is allowed only when we are not a process group leader.
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| 26 | * Otherwise our PID serves as PGID of some existing process group
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| 27 | * and cannot be used as PGID of a new process group. */
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| 28 | if (setsid() < 0) {
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| 29 | pid_t pid = fork_or_rexec(argv);
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| 30 | if (pid != 0) {
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| 31 | /* parent */
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| 32 | /* TODO:
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| 33 | * we can waitpid(pid, &status, 0) and then even
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| 34 | * emulate exitcode, making the behavior consistent
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| 35 | * in both forked and non forked cases.
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| 36 | * However, the code is larger and upstream
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| 37 | * does not do such trick.
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| 38 | */
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| 39 | exit(EXIT_SUCCESS);
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| 40 | }
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| 41 |
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| 42 | /* child */
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| 43 | /* now there should be no error: */
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| 44 | setsid();
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| 45 | }
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| 46 |
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| 47 | argv++;
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| 48 | BB_EXECVP_or_die(argv);
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| 49 | }
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