lptcontrol.c revision 114601 
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
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: head/usr.sbin/lptcontrol/lptcontrol.c 114601 2003-05-03 21:06:42Z obrien $");
33
34#include <ctype.h>
35#include <err.h>
36#include <limits.h>
37#include <paths.h>
38#include <stdio.h>
39#include <stdlib.h>
40#include <string.h>
41#include <unistd.h>
42
43#include <dev/ppbus/lptio.h>
44#include <sys/file.h>
45#include <sys/ioctl.h>
46#include <sys/types.h>
47
48
49#define PATH_LPCTL	_PATH_DEV "lpctl"
50#define DEFAULT_DEVICE	_PATH_DEV "lpt0"
51#define IRQ_INVALID	-1
52#define DO_POLL		0
53#define USE_IRQ		1
54#define USE_EXT_MODE	2
55#define USE_STD_MODE	3
56
57static void usage(void)
58{
59	fprintf(stderr, "usage: lptcontrol -i | -p | -s | -e [-d device]\n");
60	exit(1);
61}
62
63static void set_interrupt_status(int irq_status, const char * file)
64{
65	int	fd;
66
67	if((fd = open(file, O_WRONLY, 0660)) < 0)
68		err(1, "open");
69	if(ioctl(fd, LPT_IRQ, &irq_status) < 0)
70		err(1, "ioctl");
71	close(fd);
72}
73
74int main (int argc, char * argv[])
75{
76	int		opt;
77	int		irq_status = IRQ_INVALID;
78	const char	*device = DEFAULT_DEVICE;
79
80	while((opt = getopt(argc, argv, "ipesd:")) != -1)
81		switch(opt) {
82		case 'i': irq_status = USE_IRQ; break;
83		case 'p': irq_status = DO_POLL; break;
84		case 'e': irq_status = USE_EXT_MODE; break;
85		case 's': irq_status = USE_STD_MODE; break;
86		case 'd': device = optarg; break;
87		default : usage();
88		}
89	if(irq_status == IRQ_INVALID)
90		usage();
91
92	set_interrupt_status(irq_status, device);
93
94	exit(0);
95}
96