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
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <dev/ppbus/lptio.h>
  35
  36 #include <err.h>
  37 #include <fcntl.h>
  38 #include <unistd.h>
  39
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42
  43 #define DEFAULT_DEVICE  "/dev/lpt0.ctl"
  44 #define IRQ_UNSPECIFIED -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 usage(void)
  51 {
  52         fprintf(stderr,
  53                 "usage: lptcontrol -e | -i | -p | -s [[-d] controldevice]\n");
  54         exit(1);
  55 }
  56
  57 int main (int argc, char **argv)
  58 {
  59         const char *device;
  60         int fd;
  61         int irq_status;
  62         int opt;
  63
  64         device = DEFAULT_DEVICE;
  65         irq_status = IRQ_UNSPECIFIED;
  66         while ((opt = getopt(argc, argv, "d:eips")) != -1)
  67                 switch (opt) {
  68                 case 'd':
  69                         device = optarg;
  70                         break;
  71                 case 'e':
  72                         irq_status = USE_EXT_MODE;
  73                         break;
  74                 case 'i':
  75                         irq_status = USE_IRQ;
  76                         break;
  77                 case 'p':
  78                         irq_status = DO_POLL;
  79                         break;
  80                 case 's':
  81                         irq_status = USE_STD_MODE;
  82                         break;
  83                 case '?':
  84                 default:
  85                         usage();
  86                         /* NOTREACHED */
  87                 }
  88         argc -= optind;
  89         argv += optind;
  90         /* POLA: DTRT if -d was forgotten, but device name was specified. */
  91         if (argc == 1) {
  92                 device = argv[0];
  93                 --argc;
  94         }
  95
  96         if (irq_status == IRQ_UNSPECIFIED || argc != 0)
  97                 usage();
  98
  99         if ((fd = open(device, O_WRONLY)) < 0)
 100                 err(1, "open");
 101         if (ioctl(fd, LPT_IRQ, &irq_status) < 0)
 102                 err(1, "ioctl");
 103         close(fd);
 104
 105         return(0);
 106 }