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>
 */

/* getopt not needed */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include "busybox.h"

#define VTNAME "/dev/tty%d"

int openvt_main(int argc, char **argv)
{
	int pid;
	int fd;
	int vtno;
	char vtname[sizeof VTNAME + 2];
	char * cmd = NULL;
	char * cmd_args = NULL;

	if (argc < 3)
        show_usage();

	if (!isdigit(argv[1][0]))
	        show_usage();

	vtno = (int) atol(argv[1]);

	/* if (vtno <= 0 || vtno > 63) */
	if (vtno <= 0 || vtno > 12)
		error_msg_and_die("Illegal vt number (%d)", vtno);	  

	sprintf(vtname, VTNAME, vtno);

	cmd = argv[2];
	cmd_args = xmalloc(80);
	cmd_args[0] = '\0';

	if((pid = fork()) == 0) {
		/* leave current vt */

#ifdef   ESIX_5_3_2_D
		if (setpgrp() < 0) {
#else
		if (setsid() < 0) {
#endif

			perror_msg_and_die("Unable to set new session");	  
		}
		close(0);			/* so that new vt becomes stdin */

		/* and grab new one */
		if ((fd = open(vtname, O_RDWR)) == -1)
			perror_msg_and_die("could not open %s", vtname);	  

		/* Reassign stdout and sterr */
		close(1);
		close(2);
		dup(fd);
		dup(fd);

		execvp(cmd, &argv[2]);
		/*execlp(cmd, cmd_args);*/
		_exit(1);
	}
	return EXIT_SUCCESS;
}

/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/