opendir

See the current Perl documentation for opendir.

Here is our local, out-dated (pre-5.6) version:

opendir - open a directory

opendir DIRHANDLE,EXPR

Opens a directory named EXPR for processing by readdir(), telldir(), seekdir(), rewinddir(), and closedir(). Returns TRUE if successful. DIRHANDLEs have their own namespace separate from FILEHANDLEs.