* Rick Sladkey <jrs@world.std.com>
* In the public domain.
*
- * 1999-02-22 Arkadiusz MiΒΆkiewicz <misiek@pld.ORG.PL>
+ * 1999-02-22 Arkadiusz Mickiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
*
* 2001-01-18 John Fremlin <vii@penguinpowered.com>
#include "libbb.h"
int setsid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int setsid_main(int argc, char **argv)
+int setsid_main(int argc UNUSED_PARAM, char **argv)
{
- if (argc < 2)
+ if (!argv[1])
bb_show_usage();
- /* Comment why is this necessary? */
+ /* 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 (getpgrp() == getpid())
- forkexit_or_rexec(argv);
+ if (fork_or_rexec(argv))
+ exit(EXIT_SUCCESS); /* parent */
setsid(); /* no error possible */