added backlight and fixed outbound

2026-07-21 09:17:48 +03:00
parent ff2b8a250e
commit 5392273794
37 changed files with 1560 additions and 76 deletions
@@ -0,0 +1,83 @@
+#!/usr/bin/env bash
+#
+# bt-brightness - LCD backlight control for ButtonTask.
+#
+# Usage:
+#   bt-brightness status
+#   bt-brightness set <0-100>
+#
+# Invoked through sudo by the web configurator / Qt UI.
+# Prefers /sys/class/backlight/backlight; otherwise the first device with
+# max_brightness > 0.
+set -euo pipefail
+
+err() { echo "bt-brightness: $*" >&2; exit 1; }
+
+BACKLIGHT_ROOT="/sys/class/backlight"
+
+find_device() {
+    local d preferred="$BACKLIGHT_ROOT/backlight" max
+    if [ -d "$preferred" ] && [ -f "$preferred/max_brightness" ]; then
+        max="$(cat "$preferred/max_brightness" 2>/dev/null || echo 0)"
+        if [ "$max" -gt 0 ] 2>/dev/null; then
+            echo "$preferred"
+            return 0
+        fi
+    fi
+    for d in "$BACKLIGHT_ROOT"/*; do
+        [ -d "$d" ] || continue
+        [ -f "$d/max_brightness" ] || continue
+        max="$(cat "$d/max_brightness" 2>/dev/null || echo 0)"
+        if [ "$max" -gt 0 ] 2>/dev/null; then
+            echo "$d"
+            return 0
+        fi
+    done
+    return 1
+}
+
+emit_status() {
+    local dev="$1" max cur percent
+    max="$(cat "$dev/max_brightness")"
+    if [ -f "$dev/actual_brightness" ]; then
+        cur="$(cat "$dev/actual_brightness")"
+    else
+        cur="$(cat "$dev/brightness")"
+    fi
+    if [ "$max" -gt 0 ]; then
+        percent=$(( (cur * 100 + max / 2) / max ))
+    else
+        percent=0
+    fi
+    [ "$percent" -gt 100 ] && percent=100
+    [ "$percent" -lt 0 ] && percent=0
+    printf '{"device":"%s","brightness":%s,"max":%s,"percent":%s}\n' \
+        "$(basename "$dev")" "$cur" "$max" "$percent"
+}
+
+set_percent() {
+    local percent="$1" dev max value
+    [[ "$percent" =~ ^[0-9]+$ ]] || err "percent must be an integer 0-100"
+    [ "$percent" -ge 0 ] && [ "$percent" -le 100 ] || err "percent must be 0-100"
+    dev="$(find_device)" || err "no backlight device found"
+    max="$(cat "$dev/max_brightness")"
+    [ "$max" -gt 0 ] || err "max_brightness is 0"
+    value=$(( (percent * max + 50) / 100 ))
+    [ "$value" -lt 0 ] && value=0
+    [ "$value" -gt "$max" ] && value="$max"
+    # Avoid completely blank panel unless explicitly requested as 0.
+    printf '%s\n' "$value" > "$dev/brightness"
+    emit_status "$dev"
+}
+
+cmd_status() {
+    local dev
+    dev="$(find_device)" || err "no backlight device found"
+    emit_status "$dev"
+}
+
+case "${1:-}" in
+    status) cmd_status ;;
+    set) [ "$#" -eq 2 ] || err "usage: bt-brightness set <0-100>"; set_percent "$2" ;;
+    *) err "usage: bt-brightness {status|set <0-100>}" ;;
+esac