Add existing scripts

interrupt_example.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+# An example of how to ensure a user really wants to interrupt an operation
+# Useful for scripts where interruption could be harmful
+
+interrupt_count=0
+on_interrupt() {
+    if [ $interrupt_count -lt 1 ]; then
+        echo "Canceling this operation can cause errors."
+        echo "Press Ctrl-C again if you are sure you want to cancel."
+        interrupt_count=$((interrupt_count + 1))
+    else
+        # Convention is to use the status code 130 for interrupted scripts.
+        echo "Canceling long operation"
+        printf "$(tput cr)$(tput el)"
+        exit 130
+    fi
+}
+
+trap on_interrupt INT
+
+total_time=0
+while [ $total_time -le 600 ]; do
+    printf "$(tput cr)$(tput el)Long operation: ${total_time} seconds elapsed\r"
+    sleep 3
+    total_time=$((total_time + 3))
+done
+