mirror of
https://github.com/sheumann/hush.git
synced 2024-12-25 03:32:18 +00:00
21e8e8da64
function old new delta BB_EXECVP_or_die - 47 +47 time_main 1042 1043 +1 chrt_main 371 364 -7 ionice_main 292 282 -10 setsid_main 69 56 -13 nohup_main 236 223 -13 cttyhack_main 266 253 -13 chroot_main 94 81 -13 chpst_main 746 733 -13 timeout_main 297 279 -18 taskset_main 541 522 -19 vfork_child 67 45 -22 parse 975 953 -22 lpd_main 770 748 -22 launch_helper 192 170 -22 tcpudpsvd_main 1810 1782 -28 nice_main 190 156 -34 env_main 242 206 -36 run_command 221 174 -47 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/17 up/down: 48/-352) Total: -304 bytes Signed-off-by: Pascal Bellard <pascal.bellard@ads-lu.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* setsid.c -- execute a command in a new session
|
|
* Rick Sladkey <jrs@world.std.com>
|
|
* In the public domain.
|
|
*
|
|
* 1999-02-22 Arkadiusz Mickiewicz <misiek@pld.ORG.PL>
|
|
* - added Native Language Support
|
|
*
|
|
* 2001-01-18 John Fremlin <vii@penguinpowered.com>
|
|
* - fork in case we are process group leader
|
|
*
|
|
* 2004-11-12 Paul Fox
|
|
* - busyboxed
|
|
*/
|
|
|
|
#include "libbb.h"
|
|
|
|
int setsid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int setsid_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
if (!argv[1])
|
|
bb_show_usage();
|
|
|
|
/* setsid() is allowed only when we are not a process group leader.
|
|
* Otherwise our PID serves as PGID of some existing process group
|
|
* and cannot be used as PGID of a new process group. */
|
|
if (setsid() < 0) {
|
|
pid_t pid = fork_or_rexec(argv);
|
|
if (pid != 0) {
|
|
/* parent */
|
|
/* TODO:
|
|
* we can waitpid(pid, &status, 0) and then even
|
|
* emulate exitcode, making the behavior consistent
|
|
* in both forked and non forked cases.
|
|
* However, the code is larger and upstream
|
|
* does not do such trick.
|
|
*/
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
/* child */
|
|
/* now there should be no error: */
|
|
setsid();
|
|
}
|
|
|
|
argv++;
|
|
BB_EXECVP_or_die(argv);
|
|
}
|