busybox/console-tools/openvt.c

/* vi: set sw=4 ts=4: */
/*
 *  openvt.c - open a vt to run a command.
 *
 *  busyboxed by Quy Tonthat <quy@signal3.com>
 *  hacked by Tito <farmatito@tiscali.it>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

/* getopt not needed */

#include "busybox.h"

int openvt_main(int argc, char **argv)
{
	int fd;
	char vtname[sizeof(VC_FORMAT) + 2];

	if (argc < 3) {
		bb_show_usage();
	}
	/* check for illegal vt number: < 1 or > 63 */
	sprintf(vtname, VC_FORMAT, (int)xatoul_range(argv[1], 1, 63));

	if (fork() == 0) {
		/* child */
		/* leave current vt (controlling tty) */
		setsid();
		/* and grab new one */
		fd = xopen(vtname, O_RDWR);
		/* Reassign stdin, stdout and sterr */
		dup2(fd, STDIN_FILENO);
		dup2(fd, STDOUT_FILENO);
		dup2(fd, STDERR_FILENO);
		while (fd > 2) close(fd--);

		execvp(argv[2], &argv[2]);
		_exit(1);
	}
	return EXIT_SUCCESS;
}
1	niro	532	/* vi: set sw=4 ts=4: */
2			/*
3			* openvt.c - open a vt to run a command.
4			*
5			* busyboxed by Quy Tonthat <quy@signal3.com>
6			* hacked by Tito <farmatito@tiscali.it>
7			*
8			* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
9			*/
10
11			/* getopt not needed */
12
13			#include "busybox.h"
14
15			int openvt_main(int argc, char **argv)
16			{
17			int fd;
18			char vtname[sizeof(VC_FORMAT) + 2];
19
20			if (argc < 3) {
21			bb_show_usage();
22			}
23			/* check for illegal vt number: < 1 or > 63 */
24			sprintf(vtname, VC_FORMAT, (int)xatoul_range(argv[1], 1, 63));
25
26			if (fork() == 0) {
27			/* child */
28			/* leave current vt (controlling tty) */
29			setsid();
30			/* and grab new one */
31			fd = xopen(vtname, O_RDWR);
32			/* Reassign stdin, stdout and sterr */
33			dup2(fd, STDIN_FILENO);
34			dup2(fd, STDOUT_FILENO);
35			dup2(fd, STDERR_FILENO);
36			while (fd > 2) close(fd--);
37
38			execvp(argv[2], &argv[2]);
39			_exit(1);
40			}
41			return EXIT_SUCCESS;
42			}