Add system exit dialog.

.config/i3/config

@@ -179,6 +179,21 @@ mode "resize" {
 
 bindsym $mod+r mode "resize"
 
+set $mode_system System (l) lock, (e) logout, (s) suspend, (h) hibernate, (r) reboot, (Shift+s) shutdown
+mode "$mode_system" {
+    bindsym l exec --no-startup-id ~/.config/i3/i3exit lock, mode "default"
+    bindsym e exec --no-startup-id ~/.config/i3/i3exit logout, mode "default"
+    bindsym s exec --no-startup-id ~/.config/i3/i3exit suspend, mode "default"
+    bindsym h exec --no-startup-id ~/.config/i3/i3exit hibernate, mode "default"
+    bindsym r exec --no-startup-id ~/.config/i3/i3exit reboot, mode "default"
+    bindsym Shift+s exec --no-startup-id ~/.config/i3/i3exit shutdown, mode "default"
+
+    # back to normal: Enter or Escape
+    bindsym Return mode "default"
+    bindsym Escape mode "default"
+}
+bindsym $mod+Escape mode "$mode_system"
+
 exec xinput set-prop "DELL07E6:00 06CB:76AF Touchpad" "libinput Tapping Enabled" 1
 exec xmodmap ~/.Xmodmap
 

.config/i3/i3exit

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+case "$1" in
+lock)
+    i3lock
+    ;;
+logout)
+    i3-msg exit
+    ;;
+suspend)
+    i3lock && systemctl suspend
+    ;;
+hibernate)
+    i3lock && systemctl hibernate
+    ;;
+reboot)
+    systemctl reboot
+    ;;
+shutdown)
+    systemctl poweroff
+    ;;
+*)
+    echo "Usage: $0 [lock|logout|suspend|hibernate|reboot|shutdown]"
+    exit 2
+    ;;
+esac
+
+exit 0