Provide do_on_exit() function

This function allows to register an exit action which executes when the
calling script terminates.

diff --git a/testing/scripts/function.sh b/testing/scripts/function.sh
index 3e0560a46c1da689f226085ea6da9abfa5a149cf..d9f2054efccca08a72a19b516ea7abe5555cc369 100755 (executable)
--- a/testing/scripts/function.sh
+++ b/testing/scripts/function.sh
@@ -86,6 +86,34 @@ log_status()
        echo
 }
 
+# the following two functions are stolen from [1]
+# [1] - http://www.linuxjournal.com/content/use-bash-trap-statement-cleanup-temporary-files
+
+declare -a on_exit_items
+
+# perform registered actions on exit
+on_exit()
+{
+       for i in "${on_exit_items[@]}"
+       do
+               eval $i >>$LOGFILE 2>&1
+       done
+       on_exit_items=""
+       trap - EXIT
+}
+
+# register a command to execute when the calling script terminates. The
+# registered commands are called in FIFO order.
+# $* - command to register
+do_on_exit()
+{
+       local n=${#on_exit_items[*]}
+       on_exit_items[$n]="$*"
+       if [ $n -eq 0 ]; then
+               trap on_exit EXIT
+       fi
+}
+
 #############################################
 # search and replace strings throughout a
 # whole directory