usr/src/cmd/hal/tools/sunos/hal-system-lcd-set-brightness-sunos.c

   1 /***************************************************************************
   2  *
   3  * hal-system-lcd-set-brightness-sunos.c : Set LCD brightness
   4  *
   5  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
   6  * Use is subject to license terms.
   7  *
   8  * Licensed under the Academic Free License version 2.1
   9  *
  10  **************************************************************************/
  11
  12 #pragma ident   "%Z%%M% %I%     %E% SMI"
  13
  14 #ifdef HAVE_CONFIG_H
  15 #include <config.h>
  16 #endif
  17
  18 #include <errno.h>
  19 #include <string.h>
  20 #include <strings.h>
  21 #include <ctype.h>
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <sys/ioctl.h>
  25 #include <fcntl.h>
  26 #include <unistd.h>
  27 #include <sys/acpi_drv.h>
  28 #include "../../hald/util.h"
  29
  30 int
  31 main(int argc, char *argv[])
  32 {
  33         char arg[10];
  34         int level;
  35         int fd = -1;
  36         char *udi;
  37         char device_file[HAL_PATH_MAX] = "/devices";
  38         char *devfs_path;
  39
  40         if ((udi = getenv("UDI")) == NULL) {
  41                 return (1);
  42         }
  43         if ((devfs_path = getenv("HAL_PROP_SOLARIS_DEVFS_PATH")) == NULL) {
  44                 return (1);
  45         }
  46         strlcat(device_file, devfs_path, HAL_PATH_MAX);
  47         fprintf(stderr, "Setting brightness on %s (udi=%s)",
  48             device_file, udi);
  49
  50         if ((fd = open(device_file, O_RDONLY | O_NONBLOCK)) < 0) {
  51                 fprintf(stderr, "Cannot open %s: %s", device_file,
  52                     strerror(errno));
  53                 return (1);
  54         }
  55         if (fgets(arg, sizeof (arg), stdin)) {
  56                 level = atoi(arg);
  57         }
  58         if (ioctl(fd, ACPI_DRV_IOC_SET_BRIGHTNESS, &level) < 0) {
  59                 close(fd);
  60                 return (1);
  61         } else {
  62                 close(fd);
  63                 return (0);
  64         }
  65 }