* 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>
* - busyboxed
*/
-#include "busybox.h"
+#include "libbb.h"
-int setsid_main(int argc, char *argv[])
+int setsid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int setsid_main(int argc UNUSED_PARAM, char **argv)
{
- if (argc < 2)
+ if (!argv[1])
bb_show_usage();
- if (getpgrp() == getpid()) {
- switch (fork()) {
- case -1:
- bb_perror_msg_and_die("fork");
- case 0:
- break;
- default: /* parent */
- exit(0);
- }
- }
- /* child */
+ /* 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())
+ if (fork_or_rexec(argv))
+ exit(EXIT_SUCCESS); /* parent */
setsid(); /* no error possible */
- execvp(argv[1], argv + 1);
-
- bb_perror_msg_and_die("%s", argv[1]);
+ BB_EXECVP(argv[1], argv + 1);
+ bb_simple_perror_msg_and_die(argv[1]);
}