From aecc86c67e1c757d277b91a6be4e247e5f984d87 Mon Sep 17 00:00:00 2001
From: Runxi Yu <me@runxiyu.org>
Date: Fri, 30 Aug 2024 08:00:00 +0800
Subject: Add backlight

---
 rxmenu           |  1 +
 rxmenu-backlight |  9 +++++++++
 setbkl.c         | 38 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 48 insertions(+)
 create mode 100755 rxmenu-backlight
 create mode 100644 setbkl.c

diff --git a/rxmenu b/rxmenu
index 5a4c51a..fbf5380 100755
--- a/rxmenu
+++ b/rxmenu
@@ -3,6 +3,7 @@
 rxmenu-$(promptmenu rxmenu <<EOF
 profile
 cpufreq
+backlight
 telinit
 rfkill
 EOF
diff --git a/rxmenu-backlight b/rxmenu-backlight
new file mode 100755
index 0000000..5099b89
--- /dev/null
+++ b/rxmenu-backlight
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+t="$(promptmenu backlight << EOF
+EOF
+)"
+
+r="$(setbkl $t 2>&1)"
+
+notify-send "setbkl $t" "$r"
diff --git a/setbkl.c b/setbkl.c
new file mode 100644
index 0000000..05a7ffb
--- /dev/null
+++ b/setbkl.c
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: BSD-2-Clause
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <glob.h>
+
+int
+main(int argc, char **argv)
+{
+	if (argc != 2) {
+		dprintf(2, "%s: missing brightness argument\n", argv[0]);
+		return 1;
+	}
+
+	int fd = open("/sys/class/backlight/apple-panel-bl/brightness", O_WRONLY);
+	if (fd == -1) {
+		dprintf(2, "%s: can't open\n", argv[0]);
+		return 6;
+	}
+	ssize_t wl = (write(fd, argv[1], strlen(argv[1])));
+	if (wl == -1) {
+		dprintf(2, "%s: can't write\n", argv[0]);
+		return 7;
+	} else if ((size_t)wl == strlen(argv[1])) {
+	} else {
+		dprintf(2, "%s: incomplete write\n", argv[0]);
+		return 8;
+	}
+	if (close(fd) == -1) {
+		dprintf(2, "%s: can't close\n", argv[0]);
+		return 9;
+	}
+
+	return 0;
+}
-- 
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