lptcontrol.c revision 330449 
1/*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 1994 Geoffrey M. Rehmet
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *      This product includes software developed by Geoffrey M. Rehmet
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: stable/11/usr.sbin/lptcontrol/lptcontrol.c 330449 2018-03-05 07:26:05Z eadler $");
35
36#include <dev/ppbus/lptio.h>
37
38#include <err.h>
39#include <fcntl.h>
40#include <unistd.h>
41
42#include <stdio.h>
43#include <stdlib.h>
44
45#define DEFAULT_DEVICE	"/dev/lpt0.ctl"
46#define IRQ_UNSPECIFIED	-1
47#define DO_POLL		0
48#define USE_IRQ		1
49#define USE_EXT_MODE	2
50#define USE_STD_MODE	3
51
52static void usage(void)
53{
54	fprintf(stderr,
55		"usage: lptcontrol -e | -i | -p | -s [[-d] controldevice]\n");
56	exit(1);
57}
58
59int main (int argc, char **argv)
60{
61	const char *device;
62	int fd;
63	int irq_status;
64	int opt;
65
66	device = DEFAULT_DEVICE;
67	irq_status = IRQ_UNSPECIFIED;
68	while ((opt = getopt(argc, argv, "d:eips")) != -1)
69		switch (opt) {
70		case 'd':
71			device = optarg;
72			break;
73		case 'e':
74			irq_status = USE_EXT_MODE;
75			break;
76		case 'i':
77			irq_status = USE_IRQ;
78			break;
79		case 'p':
80			irq_status = DO_POLL;
81			break;
82		case 's':
83			irq_status = USE_STD_MODE;
84			break;
85		case '?':
86		default:
87			usage();
88			/* NOTREACHED */
89		}
90	argc -= optind;
91	argv += optind;
92	/* POLA: DTRT if -d was forgotten, but device name was specified. */
93	if (argc == 1) {
94		device = argv[0];
95		--argc;
96	}
97
98	if (irq_status == IRQ_UNSPECIFIED || argc != 0)
99		usage();
100
101	if ((fd = open(device, O_WRONLY)) < 0)
102		err(1, "open");
103	if (ioctl(fd, LPT_IRQ, &irq_status) < 0)
104		err(1, "ioctl");
105	close(fd);
106
107	return(0);
108}
109