xinitrc: Lock the screen after a short time of inactivity.

diff --git a/xinitrc b/xinitrc
index d242454b22d14415e0492b9013a73021ab88a542..d3b62b4cbd48d5d70ef8a54950fb3501818b659e 100755 (executable)
--- a/xinitrc
+++ b/xinitrc
@@ -37,6 +37,9 @@ fi
 installed() {
     type "$1" >/dev/null 2>&1
 }
+error() {
+    xmessage "$@" &
+}
 # Save PID of the most recently started background process. Used to terminate
 # them when logging out to prevent unused background processes. On some
 # systems this is only necessary for some programs (like ssh-agent), haven't
@@ -52,6 +55,11 @@ background_pids=
 #
 # Default to use a background image.
 set_background=yes
+# Lock screen after x minutes of inactivity, requires `xautolock` to be
+# installed.
+screen_lock_time=3
+# Locker program to lock the screen, used below with `xautolock`.
+screen_locker=xtrlock
 
 # Load settings for the local system.
 if test -f "$HOME/.xinitrc.local"; then
@@ -102,6 +110,16 @@ if installed redshift; then
     redshift -l 49.9:10.9 -t 5500:4500 >/dev/null &
 fi
 
+# Automatically lock the screen after x minutes of inactivity if `xautolock`
+# is available. Warn if locker wasn't found.
+if installed xautolock; then
+    if installed "$screen_locker"; then
+        xautolock -secure -time "$screen_lock_time" -locker "$screen_locker" &
+    else
+        error "Locker '$screen_locker' not installed. Auto lock won't work!"
+    fi
+fi
+
 
 # XMonad doesn't start a terminal emulator on its own, start one when I login.
 (urxvt || rxvt || xterm) &