Index: src/gpm-backlight-helper.c
--- src/gpm-backlight-helper.c.orig
+++ src/gpm-backlight-helper.c
@@ -30,6 +30,11 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 
+#if defined(__OpenBSD__)
+#include <sys/ioctl.h>
+#include <dev/wscons/wsconsio.h>
+#endif
+
 #define GCM_BACKLIGHT_HELPER_EXIT_CODE_SUCCESS			0
 #define GCM_BACKLIGHT_HELPER_EXIT_CODE_FAILED			1
 #define GCM_BACKLIGHT_HELPER_EXIT_CODE_ARGUMENTS_INVALID	3
@@ -37,6 +42,7 @@
 
 #define GCM_BACKLIGHT_HELPER_SYSFS_LOCATION			"/sys/class/backlight"
 
+#if !defined(__OpenBSD__)
 /**
  * gcm_backlight_helper_get_best_backlight:
  **/
@@ -140,6 +146,7 @@ out:
 	g_free (text);
 	return ret;
 }
+#endif
 
 /**
  * main:
@@ -152,13 +159,20 @@ main (gint argc, gchar *argv[])
 	gint euid;
 	guint retval = 0;
 	const gchar *pkexec_uid_str;
+#if defined(__linux__)
 	GError *error = NULL;
 	gboolean ret = FALSE;
+#endif
 	gint set_brightness = -1;
 	gboolean get_brightness = FALSE;
 	gboolean get_max_brightness = FALSE;
+#if defined(__linux__)
 	gchar *filename = NULL;
 	gchar *filename_file = NULL;
+#elif defined(__OpenBSD__)
+	gint fd = -1;
+	struct wsdisplay_param wdp;
+#endif
 	gchar *contents = NULL;
 
 	const GOptionEntry options[] = {
@@ -196,16 +210,31 @@ main (gint argc, gchar *argv[])
 	}
 
 	/* find device */
+#if defined(__linux__)
 	filename = gcm_backlight_helper_get_best_backlight ();
 	if (filename == NULL) {
+#elif defined(__OpenBSD__)
+	if ((fd = open("/dev/ttyC4", O_RDWR)) < 0) {
+#endif
 		/* TRANSLATORS: no backlights found */
 		g_print ("%s\n", _("No backlights were found on your system"));
 		retval = GCM_BACKLIGHT_HELPER_EXIT_CODE_INVALID_USER;
 		goto out;
 	}
 
+#if defined(__OpenBSD__)
+	wdp.param = WSDISPLAYIO_PARAM_BRIGHTNESS;
+	if (ioctl(fd, WSDISPLAYIO_GETPARAM, &wdp) < 0) {
+		/* TRANSLATORS: failed to access backlight file */
+		g_print ("%s: %s\n", _("Could not get the value of the backlight"), g_strerror(errno));
+		retval = GCM_BACKLIGHT_HELPER_EXIT_CODE_ARGUMENTS_INVALID;
+		goto out;
+	}
+#endif
+
 	/* GetBrightness */
 	if (get_brightness) {
+#if defined(__linux__)
 		filename_file = g_build_filename (filename, "brightness", NULL);
 		ret = g_file_get_contents (filename_file, &contents, NULL, &error);
 		if (!ret) {
@@ -215,6 +244,9 @@ main (gint argc, gchar *argv[])
 			retval = GCM_BACKLIGHT_HELPER_EXIT_CODE_ARGUMENTS_INVALID;
 			goto out;
 		}
+#elif defined(__OpenBSD__)
+		contents = g_strdup_printf ("%d", wdp.curval);
+#endif
 
 		/* just print the contents to stdout */
 		g_print ("%s", contents);
@@ -224,6 +256,7 @@ main (gint argc, gchar *argv[])
 
 	/* GetSteps */
 	if (get_max_brightness) {
+#if defined(__linux__)
 		filename_file = g_build_filename (filename, "max_brightness", NULL);
 		ret = g_file_get_contents (filename_file, &contents, NULL, &error);
 		if (!ret) {
@@ -233,6 +266,9 @@ main (gint argc, gchar *argv[])
 			retval = GCM_BACKLIGHT_HELPER_EXIT_CODE_ARGUMENTS_INVALID;
 			goto out;
 		}
+#elif defined(__OpenBSD__)
+		contents = g_strdup_printf ("%d", wdp.max);
+#endif
 
 		/* just print the contents to stdout */
 		g_print ("%s", contents);
@@ -261,6 +297,7 @@ main (gint argc, gchar *argv[])
 
 	/* SetBrightness */
 	if (set_brightness != -1) {
+#if defined(__linux__) 
 		filename_file = g_build_filename (filename, "brightness", NULL);
 		ret = gcm_backlight_helper_write (filename_file, set_brightness, &error);
 		if (!ret) {
@@ -270,13 +307,27 @@ main (gint argc, gchar *argv[])
 			retval = GCM_BACKLIGHT_HELPER_EXIT_CODE_ARGUMENTS_INVALID;
 			goto out;
 		}
+#elif defined(__OpenBSD__)
+		wdp.curval = set_brightness;
+		if (ioctl(fd, WSDISPLAYIO_SETPARAM, &wdp) < 0) {
+			/* TRANSLATORS: failed to access backlight file */
+			g_print ("%s: %s\n", _("Could not set the value of the backlight"), g_strerror(errno));
+			retval = GCM_BACKLIGHT_HELPER_EXIT_CODE_ARGUMENTS_INVALID;
+			goto out;
+		}
+#endif
 	}
 
 	/* success */
 	retval = GCM_BACKLIGHT_HELPER_EXIT_CODE_SUCCESS;
 out:
+#if defined(__linux__)
 	g_free (filename);
 	g_free (filename_file);
+#elif defined(__OpenBSD__)
+	if (fd >= 0)
+		close (fd);
+#endif
 	g_free (contents);
 	return retval;
 }