hal-system-lcd-get-brightness-sunos.c revision 6573:7a725819f4fe 
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
30int
31main(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}
64