implemented openbsd support for the backlight function.
this only works when running slstatus as superuser.
---
Hi Guys,
i have implemented basic support for the backlight function on OpenBSD.
The problem here is that /dev/ttyC0 permission is 600 (root:wheel) so a
user cannot read from the device without changing the permission or
running slstatus as root.
Anyway, this is just an proposal. Hopefully there is
another solution to solve this. I know that we could also do this by
linking against xcb-xrandr (like xbacklight does) but i think we should
not do this for now.
Greetings,
Tobias
components/backlight.c | 26 ++++++++++++++++++++++++++
config.def.h | 1 +
2 files changed, 27 insertions(+)
diff --git a/components/backlight.c b/components/backlight.c
index f9c4096..21e06a1 100644
--- a/components/backlight.c
+++ b/components/backlight.c
@@ -29,4 +29,30 @@
return bprintf("%d", cur * 100 / max);
}
+
+#elif defined(__OpenBSD__)
+ #include <fcntl.h>
+ #include <sys/ioctl.h>
+ #include <sys/time.h>
+ #include <dev/wscons/wsconsio.h>
+
+ const char *
+ backlight_perc(const char *unused)
+ {
+ int fd, err;
+ struct wsdisplay_param wsd_param = {
+ .param = WSDISPLAYIO_PARAM_BRIGHTNESS
+ };
+
+ if ((fd = open("/dev/ttyC0", O_RDONLY)) < 0) {
+ warn("could not open /dev/ttyC0");
+ return NULL;
+ }
+ if ((err = ioctl(fd, WSDISPLAYIO_GETPARAM, &wsd_param)) < 0) {
+ warn("ioctl 'WSDISPLAYIO_GETPARAM' failed");
+ return NULL;
+ }
+ return bprintf("%d", wsd_param.curval * 100 / wsd_param.max);
+ }
+
#endif
diff --git a/config.def.h b/config.def.h
index 75debe5..3a0f838 100644
--- a/config.def.h
+++ b/config.def.h
@@ -14,6 +14,7 @@ static const char unknown_str[] = "n/a";
*
* backlight_perc backlight percentage device name
* (intel_backlight)
+ * NULL on OpenBSD
* battery_perc battery percentage battery name (BAT0)
* NULL on OpenBSD
* battery_state battery charging state battery name (BAT0)
--
2.16.2
