dirname - strip non-directory suffix from file name

SYNOPSIS

       dirname filename
       dirname {--help,--version}

DESCRIPTION

       This  manual  page  documents  the GNU version of dirname.
       dirname prints all but the final slash-delimited component
       of  filename.   If filename is a single component, dirname
       prints `.' (meaning the current directory).

   OPTIONS
       --help Print a usage message on standard output  and  exit
              successfully.

       --version
              Print  version  information on standard output then
              exit successfully.