clip-sanitizer: resilient event loop with xset display wait, printf safety, and fleet-wide systemd integration

clip-sanitizer.sh

@@ -1,17 +1,32 @@
 #!/usr/bin/env bash
+# clip-sanitizer — Fleet-wide clipboard sanitizer (nukes NBSP \xc2\xa0 and ZWSP \xe2\x80\x8b)
+# Runs as systemd user service and autostart on t520, bazina, and boxC
 
-while clipnotify; do
-    # Grab what was just copied
-    current_content=$(xclip -selection clipboard -o 2>/dev/null)
-    
-    if [[ -n "$current_content" ]]; then
-        # Nuke NBSP (c2 a0) and ZWSP (e2 80 8b)
-        sanitized=$(echo -n "$current_content" | sed 's/\xc2\xa0/ /g; s/\xe2\x80\x8b//g')
-        
-        # Guard: Only write back if a cheesy space was actually destroyed
-        # This prevents an infinite event loop
-        if [[ "$current_content" != "$sanitized" ]]; then
-            echo -n "$sanitized" | xclip -selection clipboard -i
+export DISPLAY="${DISPLAY:-:0}"
+
+# Wait for X server display to become ready
+while ! xset q >/dev/null 2>&1; do
+    sleep 2
+done
+
+# Main event loop (resilient against clipnotify transient exits)
+while true; do
+    if ! clipnotify 2>/dev/null; then
+        sleep 1
+        continue
+    fi
+
+    # Grab clipboard content safely
+    if current_content=$(xclip -selection clipboard -o 2>/dev/null); then
+        if [[ -n "$current_content" ]]; then
+            # Nuke NBSP (c2 a0 -> standard space) and ZWSP (e2 80 8b -> empty)
+            sanitized=$(printf "%s" "$current_content" | sed 's/\xc2\xa0/ /g; s/\xe2\x80\x8b//g')
+            
+            # Guard: Only write back if a cheesy space was actually destroyed
+            # This prevents infinite loops with clipnotify
+            if [[ "$current_content" != "$sanitized" ]]; then
+                printf "%s" "$sanitized" | xclip -selection clipboard -i
+            fi
         fi
     fi
 done