shred command. Autodetect file type

[John Darrington]

if --remove (-u) is specified.  The default is not to remove the files because 
it is common to operate on device files like /dev/hda,
       and those files usually should not be removed.  When operating on 
regular files, most people use the --remove option.

Why not use the stat system call to find out what type of file we're dealing 
with, and then remove or not remove accordingly ?