config root man

/*
 * Copyright (c) 1994 Geoffrey M. Rehmet
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Geoffrey M. Rehmet
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/usr.sbin/lptcontrol/lptcontrol.c 140814 2005-01-25 14:25:18Z ssouhlal $");

#include <dev/ppbus/lptio.h>

#include <err.h>
#include <fcntl.h>
#include <unistd.h>

#include <stdio.h>
#include <stdlib.h>

#define DEFAULT_DEVICE	"/dev/lpt0.ctl"
#define IRQ_UNSPECIFIED	-1
#define DO_POLL		0
#define USE_IRQ		1
#define USE_EXT_MODE	2
#define USE_STD_MODE	3

static void usage(void)
{
	fprintf(stderr,
		"usage: lptcontrol -e | -i | -p | -s [[-d] controldevice]\n");
	exit(1);
}

int main (int argc, char **argv)
{
	const char *device;
	int fd;
	int irq_status;
	int opt;

	device = DEFAULT_DEVICE;
	irq_status = IRQ_UNSPECIFIED;
	while ((opt = getopt(argc, argv, "d:eips")) != -1)
		switch (opt) {
		case 'd':
			device = optarg;
			break;
		case 'e':
			irq_status = USE_EXT_MODE;
			break;
		case 'i':
			irq_status = USE_IRQ;
			break;
		case 'p':
			irq_status = DO_POLL;
			break;
		case 's':
			irq_status = USE_STD_MODE;
			break;
		case '?':
		default:
			usage();
			/* NOTREACHED */
		}
	argc -= optind;
	argv += optind;
	/* POLA: DTRT if -d was forgotten, but device name was specified. */
	if (argc == 1) {
		device = argv[0];
		--argc;
	}

	if (irq_status == IRQ_UNSPECIFIED || argc != 0)
		usage();

	if ((fd = open(device, O_WRONLY)) < 0)
		err(1, "open");
	if (ioctl(fd, LPT_IRQ, &irq_status) < 0)
		err(1, "ioctl");
	close(fd);

	return(0);
}