usr.sbin/lptcontrol/lptcontrol.c

   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 }