OpenSolaris_b135/cmd/vt/vtinfo.c

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/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stropts.h>
#include <sys/vt.h>

/*
 * return value:
 *  0: disabled
 *  1: enabled
 *  2: An error occured
 */
int
main(void)
{
	int result;
	int fd;

	if ((fd = open("/dev/vt/0", O_RDONLY)) < 0)
		return (2);

	if (ioctl(fd, VT_ENABLED, &result) != 0) {
		(void) close(fd);
		return (2);
	}

	(void) close(fd);

	if (result == 0)
		return (0);	/* disabled */

	return (1);		/* enabled */
}