safelyRenameFile — Rename a file to a backup, and then rename the replacement.
safelyRenameFile ( String original , String backup , String replacement )
The command has the following arguments:
originalthe original file to be replaced
backupthe name of the backup file
replacementthe file to be renamed to the original
Rename a file to a backup, and then rename the replacement. Try to undo the changes if any of the moves do not work.