151 lines
4.0 KiB
Diff
151 lines
4.0 KiB
Diff
From aadea01ca9cd99932500f4988d7c57f6bc5fa6c5 Mon Sep 17 00:00:00 2001
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From: Son Phan Trung <phantrungson17@gmail.com>
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Date: Sat, 27 Jan 2024 21:10:41 +0700
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Subject: [PATCH] Add backlight module for slstatus.
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FreeBSD support is added, with these things to keep in mind:
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- Device names are numbered compared to Linux (e.g. "intel_backlight0" instead "intel_backlight).
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- Max number is hardcoded to 100.
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---
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Makefile | 1 +
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components/backlight.c | 86 ++++++++++++++++++++++++++++++++++++++++++
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config.def.h | 3 ++
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slstatus.h | 3 ++
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4 files changed, 93 insertions(+)
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create mode 100644 components/backlight.c
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diff --git a/Makefile b/Makefile
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index 7a18274..a7eacfa 100644
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--- a/Makefile
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+++ b/Makefile
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@@ -6,6 +6,7 @@ include config.mk
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REQ = util
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COM =\
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+ components/backlight\
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components/battery\
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components/cat\
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components/cpu\
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diff --git a/components/backlight.c b/components/backlight.c
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new file mode 100644
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index 0000000..46240f6
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--- /dev/null
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+++ b/components/backlight.c
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@@ -0,0 +1,86 @@
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+/* See LICENSE file for copyright and license details. */
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+
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+#include <stddef.h>
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+
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+#include "../util.h"
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+
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+#if defined(__linux__)
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+ #include <limits.h>
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+
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+ #define BRIGHTNESS_MAX "/sys/class/backlight/%s/max_brightness"
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+ #define BRIGHTNESS_CUR "/sys/class/backlight/%s/brightness"
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+
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+ const char *
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+ backlight_perc(const char *card)
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+ {
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+ char path[PATH_MAX];
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+ int max, cur;
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+
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+ if (esnprintf(path, sizeof (path), BRIGHTNESS_MAX, card) < 0 ||
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+ pscanf(path, "%d", &max) != 1) {
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+ return NULL;
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+ }
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+
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+ if (esnprintf(path, sizeof (path), BRIGHTNESS_CUR, card) < 0 ||
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+ pscanf(path, "%d", &cur) != 1) {
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+ return NULL;
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+ }
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+
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+ if (max == 0) {
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+ return NULL;
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+ }
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+
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+ return bprintf("%d%%", cur * 100 / max);
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+ }
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+#elif defined(__OpenBSD__)
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+ #include <fcntl.h>
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+ #include <sys/ioctl.h>
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+ #include <sys/time.h>
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+ #include <dev/wscons/wsconsio.h>
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+
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+ const char *
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+ backlight_perc(const char *unused)
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+ {
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+ int fd, err;
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+ struct wsdisplay_param wsd_param = {
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+ .param = WSDISPLAYIO_PARAM_BRIGHTNESS
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+ };
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+
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+ if ((fd = open("/dev/ttyC0", O_RDONLY)) < 0) {
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+ warn("could not open /dev/ttyC0");
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+ return NULL;
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+ }
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+ if ((err = ioctl(fd, WSDISPLAYIO_GETPARAM, &wsd_param)) < 0) {
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+ warn("ioctl 'WSDISPLAYIO_GETPARAM' failed");
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+ return NULL;
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+ }
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+ return bprintf("%d", wsd_param.curval * 100 / wsd_param.max);
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+ }
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+#elif defined(__FreeBSD__)
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+ #include <fcntl.h>
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+ #include <stdio.h>
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+ #include <sys/ioctl.h>
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+ #include <sys/backlight.h>
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+
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+ #define FBSD_BACKLIGHT_DEV "/dev/backlight/%s"
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+
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+ const char *
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+ backlight_perc(const char *card)
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+ {
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+ char buf[256];
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+ struct backlight_props props;
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+ int fd;
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+
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+ snprintf(buf, sizeof(buf), FBSD_BACKLIGHT_DEV, card);
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+ if ((fd = open(buf, O_RDWR)) == -1) {
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+ warn("could not open %s", card);
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+ return NULL;
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+ }
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+ if (ioctl(fd, BACKLIGHTGETSTATUS, &props) == -1){
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+ warn("Cannot query the backlight device");
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+ return NULL;
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+ }
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+
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+ return bprintf("%d", props.brightness);
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+ }
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+#endif
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diff --git a/config.def.h b/config.def.h
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index d805331..d56051d 100644
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--- a/config.def.h
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+++ b/config.def.h
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@@ -12,6 +12,9 @@ static const char unknown_str[] = "n/a";
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/*
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* function description argument (example)
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*
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+ * backlight_perc backlight percentage device name
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+ * (intel_backlight, numbered on FreeBSD)
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+ * NULL on OpenBSD
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* battery_perc battery percentage battery name (BAT0)
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* NULL on OpenBSD/FreeBSD
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* battery_remaining battery remaining HH:MM battery name (BAT0)
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diff --git a/slstatus.h b/slstatus.h
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index 8ef5874..dc7e2d0 100644
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--- a/slstatus.h
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+++ b/slstatus.h
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@@ -1,5 +1,8 @@
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/* See LICENSE file for copyright and license details. */
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+/* backlight */
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+const char *backlight_perc(const char *);
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+
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/* battery */
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const char *battery_perc(const char *);
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const char *battery_remaining(const char *);
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--
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2.42.0
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