=over =item rename OLDNAME,NEWNAME X X X X Changes the name of a file; an existing file NEWNAME will be clobbered. Returns true for success, false otherwise. Behavior of this function varies wildly depending on your system implementation. For example, it will usually not work across file system boundaries, even though the system I command sometimes compensates for this. Other restrictions include whether it works on directories, open files, or pre-existing files. Check L and either the rename(2) manpage or equivalent system documentation for details. For a platform independent C function look at the L module. Portability issues: L. =back