wallpapers and mute led script

2026-07-05 23:45:29 +05:30
parent cd3c68c2b5
commit f7c70ad1cb
4 changed files with 180 additions and 1 deletions
@@ -0,0 +1,178 @@
+#!/usr/bin/env bash
+#
+# Installer for the HP Victus mute-LED sync.
+#
+#   Run it with root:   sudo bash hp-mute-led-install.sh
+#
+# It installs:
+#   /usr/local/bin/hp-mute-led            root helper that toggles the LED
+#   /usr/local/bin/hp-mute-led-watch      per-user monitor of the mute state
+#   /etc/systemd/user/hp-mute-led.service user service that runs the monitor
+#   /etc/sudoers.d/hp-mute-led            lets the monitor call the helper
+#
+# Uninstall:  sudo bash hp-mute-led-install.sh --uninstall
+#
+set -euo pipefail
+
+BIN_DIR="${BIN_DIR:-/usr/local/bin}"
+UNIT_DIR="${UNIT_DIR:-/etc/systemd/user}"
+SUDOERS_DIR="${SUDOERS_DIR:-/etc/sudoers.d}"
+DO_SYSTEM="${DO_SYSTEM:-1}"   # set 0 for a no-root dry run into custom dirs
+
+HELPER="$BIN_DIR/hp-mute-led"
+WATCH="$BIN_DIR/hp-mute-led-watch"
+UNIT="$UNIT_DIR/hp-mute-led.service"
+SUDOERS="$SUDOERS_DIR/hp-mute-led"
+
+if [ "${1:-}" = "--uninstall" ]; then
+    if [ "$DO_SYSTEM" = 1 ]; then
+        systemctl --global disable hp-mute-led.service 2>/dev/null || true
+    fi
+    rm -f "$HELPER" "$WATCH" "$UNIT" "$SUDOERS"
+    [ "$DO_SYSTEM" = 1 ] && systemctl daemon-reload 2>/dev/null || true
+    echo "Removed. Run 'systemctl --user disable --now hp-mute-led.service' in each user session."
+    exit 0
+fi
+
+if [ "$DO_SYSTEM" = 1 ] && [ "$(id -u)" -ne 0 ]; then
+    echo "This installer must run as root:  sudo bash $0" >&2
+    exit 1
+fi
+
+if [ "$DO_SYSTEM" = 1 ] && ! command -v hda-verb >/dev/null 2>&1; then
+    echo "hda-verb not found (install the 'alsa-tools' package first)." >&2
+    exit 1
+fi
+
+mkdir -p "$BIN_DIR" "$UNIT_DIR" "$SUDOERS_DIR"
+
+# ---------------------------------------------------------------- root helper
+cat > "$HELPER" <<'HELPER_EOF'
+#!/usr/bin/env bash
+# Toggle the HP Victus (Realtek ALC245) mute-key status LED.
+#   hp-mute-led on    -> LED lit   (audio muted)
+#   hp-mute-led off   -> LED dark  (audio not muted)
+# Must run as root: the HDA hwdep interface requires it.
+set -euo pipefail
+
+case "${1:-}" in
+    on)  val=0x8 ;;
+    off) val=0x0 ;;
+    *)   echo "usage: ${0##*/} on|off" >&2; exit 2 ;;
+esac
+
+HDA_VERB=/usr/bin/hda-verb
+
+# Find the Realtek codec's hwdep node (robust if card numbers change).
+dev=""
+for codec in /proc/asound/card*/codec#*; do
+    [ -e "$codec" ] || continue
+    if grep -qi "Realtek" "$codec"; then
+        card="${codec%/codec#*}"
+        idx="${card##*card}"
+        cn="${codec##*#}"
+        cand="/dev/snd/hwC${idx}D${cn}"
+        if [ -e "$cand" ]; then dev="$cand"; break; fi
+    fi
+done
+[ -n "$dev" ] || dev="/dev/snd/hwC1D0"
+
+# Select processing-coefficient index 0x0B on the vendor widget (node 0x20),
+# then write the LED value.
+"$HDA_VERB" "$dev" 0x20 0x500 0x0B >/dev/null
+"$HDA_VERB" "$dev" 0x20 0x400 "$val" >/dev/null
+HELPER_EOF
+chmod 0755 "$HELPER"
+
+# --------------------------------------------------------------- watch script
+cat > "$WATCH" <<'WATCH_EOF'
+#!/usr/bin/env bash
+# Per-user monitor: mirror the default sink's mute state onto the mute LED.
+# Runs as the logged-in user; drives the LED through the sudo helper.
+set -u
+
+HELPER="/usr/local/bin/hp-mute-led"
+last=""
+
+desired_state() {
+    if pactl get-sink-mute @DEFAULT_SINK@ 2>/dev/null | grep -qi 'yes'; then
+        echo on
+    else
+        echo off
+    fi
+}
+
+sync_led() {
+    local d
+    d="$(desired_state)"
+    if [ "$d" != "$last" ]; then
+        if sudo -n "$HELPER" "$d" >/dev/null 2>&1; then
+            last="$d"
+        fi
+    fi
+}
+
+while true; do
+    # Wait until the audio server is reachable.
+    if ! pactl info >/dev/null 2>&1; then
+        sleep 5
+        continue
+    fi
+
+    last=""        # force an initial push after (re)connecting
+    sync_led
+
+    # React to mute changes and default-sink changes.
+    while read -r line; do
+        case "$line" in
+            *"on sink"*|*"on server"*) sync_led ;;
+        esac
+    done < <(pactl subscribe 2>/dev/null)
+
+    sleep 2        # subscribe ended (server restart?), reconnect
+done
+WATCH_EOF
+chmod 0755 "$WATCH"
+
+# ------------------------------------------------------------------ user unit
+cat > "$UNIT" <<'UNIT_EOF'
+[Unit]
+Description=HP Victus mute LED synchronisation
+After=pipewire-pulse.service pipewire.service
+Wants=pipewire-pulse.service
+
+[Service]
+Type=simple
+ExecStart=/usr/local/bin/hp-mute-led-watch
+Restart=on-failure
+RestartSec=3
+
+[Install]
+WantedBy=default.target
+UNIT_EOF
+chmod 0644 "$UNIT"
+
+# -------------------------------------------------------------------- sudoers
+umask 077
+cat > "$SUDOERS" <<'SUDOERS_EOF'
+# Let any local user drive the HP Victus mute LED. The command is fixed and
+# the only accepted arguments are "on" and "off", so this is safe.
+ALL ALL=(root) NOPASSWD: /usr/local/bin/hp-mute-led on, /usr/local/bin/hp-mute-led off
+SUDOERS_EOF
+chmod 0440 "$SUDOERS"
+
+if [ "$DO_SYSTEM" = 1 ]; then
+    visudo -cf "$SUDOERS" >/dev/null
+    systemctl daemon-reload || true
+    systemctl --global enable hp-mute-led.service
+
+    target_user="${SUDO_USER:-your-user}"
+    echo
+    echo "Installed successfully."
+    echo
+    echo "Start it now in the desktop session of '$target_user' (no root):"
+    echo "    systemctl --user daemon-reload"
+    echo "    systemctl --user enable --now hp-mute-led.service"
+    echo
+    echo "It also auto-starts for every user at their next login."
+fi