1 files changed, 44 insertions, 0 deletions
diff --git a/src/detection/brightness/brightness_obsd.c b/src/detection/brightness/brightness_obsd.c
new file mode 100644
index 0000000..102a8c2
--- /dev/null
+++ b/src/detection/brightness/brightness_obsd.c
@@ -0,0 +1,44 @@
+#include "brightness.h"
+#include "common/io.h"
+
+#include <dev/wscons/wsconsio.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+const char* ffDetectBrightness(FF_A_UNUSED FFBrightnessOptions* options, FFlist* result) {
+    char path[] = "/dev/ttyCX";
+    for (char i = '0'; i <= '9'; ++i) {
+        path[strlen("/dev/ttyC")] = i;
+
+        FF_AUTO_CLOSE_FD int devfd = open(path, O_RDONLY | O_CLOEXEC);
+
+        if (devfd < 0) {
+            if (errno == EACCES && i == '0') {
+                return "Permission denied when opening tty device";
+            }
+            if (errno == ENOENT) {
+                break;
+            }
+            continue;
+        }
+
+        struct wsdisplay_param param = {
+            .param = WSDISPLAYIO_PARAM_BRIGHTNESS,
+        };
+
+        if (ioctl(devfd, WSDISPLAYIO_GETPARAM, &param) < 0) {
+            continue;
+        }
+
+        FFBrightnessResult* brightness = FF_LIST_ADD(FFBrightnessResult, *result);
+        ffStrbufInitF(&brightness->name, "ttyC%c", i);
+
+        brightness->max = param.max;
+        brightness->min = param.min;
+        brightness->current = param.curval;
+        brightness->builtin = true;
+    }
+
+    return NULL;
+}