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

   1 /***************************************************************************
   2  *
   3  * hal-system-lcd-get-brightness-sunos.c : Get 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 "../../hald/util.h"
  28 #include <sys/acpi_drv.h>
  29
  30 int
  31 main(int argc, char *argv[])
  32 {
  33         struct acpi_drv_output_status status;
  34         int fd = -1;
  35         char *udi;
  36         char device_file[HAL_PATH_MAX] = "/devices";
  37         char *devfs_path;
  38
  39         if ((udi = getenv("UDI")) == NULL) {
  40                 return (-1);
  41         }
  42         if ((devfs_path = getenv("HAL_PROP_SOLARIS_DEVFS_PATH")) == NULL) {
  43                 return (-1);
  44         }
  45
  46         strlcat(device_file, devfs_path, HAL_PATH_MAX);
  47         fprintf(stderr, "Getting brightness on %s (udi=%s)",
  48             device_file, udi);
  49         if ((fd = open(device_file, O_RDONLY | O_NONBLOCK)) < 0) {
  50                 fprintf(stderr, "Cannot open %s: %s", device_file,
  51                     strerror(errno));
  52                 return (-1);
  53         }
  54
  55         bzero(&status, sizeof (status));
  56         if (ioctl(fd, ACPI_DRV_IOC_STATUS, &status) < 0) {
  57                 close(fd);
  58                 return (-1);
  59         } else {
  60                 close(fd);
  61                 return (status.cur_level_index);
  62         }
  63 }