busybox/miscutils/setsid.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 Mi¶kiewicz <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 "busybox.h"

int setsid_main(int argc, char *argv[])
{
	if (argc < 2)
		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();  /* no error possible */

	execvp(argv[1], argv + 1);

	bb_perror_msg_and_die("%s", argv[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 Mi¶kiewicz <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 "busybox.h"
18
19	int setsid_main(int argc, char *argv[])
20	{
21	if (argc < 2)
22	bb_show_usage();
23
24	if (getpgrp() == getpid()) {
25	switch (fork()) {
26	case -1:
27	bb_perror_msg_and_die("fork");
28	case 0:
29	break;
30	default: /* parent */
31	exit(0);
32	}
33	}
34	/* child */
35
36	setsid(); /* no error possible */
37
38	execvp(argv[1], argv + 1);
39
40	bb_perror_msg_and_die("%s", argv[1]);
41	}