p4raw-id: //depot/perl@1597
-f File is a plain file.
-d File is a directory.
-l File is a symbolic link.
- -p File is a named pipe (FIFO).
+ -p File is a named pipe (FIFO), or Filehandle is a pipe.
-S File is a socket.
-b File is a block special file.
-c File is a character special file.