1 /*
2  * Copyright (c) 1994 Geoffrey M. Rehmet
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *      This product includes software developed by Geoffrey M. Rehmet
16  * 4. The name of the author may not be used to endorse or promote products
17  *    derived from this software without specific prior written permission
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  *
30  * $FreeBSD: src/usr.sbin/lptcontrol/lptcontrol.c,v 1.9.2.2 2001/07/30 10:22:57 dd Exp $
31  * $DragonFly: src/usr.sbin/lptcontrol/lptcontrol.c,v 1.4 2005/01/23 19:52:30 liamfoy Exp $
32  */
33 #include <sys/ioctl.h>
34 
35 #include <err.h>
36 #include <fcntl.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <unistd.h>
40 
41 #include <dev/misc/lpt/lptio.h>
42 
43 #define DEFAULT_DEVICE	"/dev/lpt0"
44 #define IRQ_INVALID	-1
45 #define DO_POLL		0
46 #define USE_IRQ		1
47 #define USE_EXT_MODE	2
48 #define USE_STD_MODE	3
49 
50 static void
51 usage(void)
52 {
53 	fprintf(stderr, "usage: lptcontrol -i | -p | -s | -e [-d device]\n");
54 	exit(1);
55 }
56 
57 int
58 main(int argc, char *argv[])
59 {
60 	int opt;
61 	int fd;
62 	int irq_status = IRQ_INVALID;
63 	const char *device = DEFAULT_DEVICE;
64 
65 	while ((opt = getopt(argc, argv, "ipesd:")) != -1) {
66 		switch (opt) {
67 		case 'i':
68 			irq_status = USE_IRQ;
69 			break;
70 		case 'p':
71 			irq_status = DO_POLL;
72 			break;
73 		case 'e':
74 			irq_status = USE_EXT_MODE;
75 			break;
76 		case 's':
77 			irq_status = USE_STD_MODE;
78 			break;
79 		case 'd':
80 			device = optarg;
81 			break;
82 		default:
83 			usage();
84 		}
85 	}
86 	argc -= optind;
87 	argv += optind;
88 
89 	if (argc == 1 || irq_status == IRQ_INVALID)
90 		usage();
91 
92 	if ((fd = open(device, O_WRONLY)) < 0)
93 		err(1, "open failed: %s", device);
94 
95 	if (ioctl(fd, LPT_IRQ, &irq_status) < 0)
96 		err(1, "ioctl failed");
97 
98 	close(fd);
99 	exit(0);
100 }
101