lptcontrol.c revision 60726 
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 withough 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
31#ifndef lint
32static const char rcsid[] =
33  "$FreeBSD: head/usr.sbin/lptcontrol/lptcontrol.c 60726 2000-05-19 22:09:21Z peter $";
34#endif /* not lint */
35
36#include <ctype.h>
37#include <err.h>
38#include <limits.h>
39#include <paths.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <unistd.h>
44
45#include <dev/ppbus/lptio.h>
46#include <sys/file.h>
47#include <sys/ioctl.h>
48#include <sys/types.h>
49
50
51#define PATH_LPCTL	_PATH_DEV "lpctl"
52#define DEFAULT_DEVICE	"/dev/lpt0"
53#define IRQ_INVALID	-1
54#define DO_POLL		0
55#define USE_IRQ		1
56#define USE_EXT_MODE	2
57#define USE_STD_MODE	3
58
59static void usage()
60{
61	fprintf(stderr, "usage: lptcontrol -i | -p | -s | -e [-d device]\n");
62	exit(1);
63}
64
65static void set_interrupt_status(int irq_status, const char * file)
66{
67	int	fd;
68
69	if((fd = open(file, O_WRONLY, 0660)) < 0)
70		err(1, "open");
71	if(ioctl(fd, LPT_IRQ, &irq_status) < 0)
72		err(1, "ioctl");
73	close(fd);
74}
75
76int main (int argc, char * argv[])
77{
78	int		opt;
79	int		irq_status = IRQ_INVALID;
80	char		*device = DEFAULT_DEVICE;
81
82	while((opt = getopt(argc, argv, "ipesd:")) != -1)
83		switch(opt) {
84		case 'i': irq_status = USE_IRQ; break;
85		case 'p': irq_status = DO_POLL; break;
86		case 'e': irq_status = USE_EXT_MODE; break;
87		case 's': irq_status = USE_STD_MODE; break;
88		case 'd': device = optarg; break;
89		default : usage();
90		}
91	if(irq_status == IRQ_INVALID)
92		usage();
93
94	set_interrupt_status(irq_status, device);
95
96	exit(0);
97}
98