The CDSA$VALIDATE program allows the user to check the validity of a
   manifest against the file that it was created from.  It performs the
   same functionality as programmatically calling CDSA_FileValidate, but
   from a stand-alone program.

 SYNOPSIS

   $ CDSA$VALIDATE filename

 OPTIONS

   filename
     The full file specification of the file for which the manifest was
     created.  Currently, the filename must be a Windows style path in
     order to be compatible with CDSA.  The name of the manifest that
     is the digital signature of 'filename' is calculated from the
     target filename.  The manifest has a file extension of "*.<ext>_ESW"
     where <ext> is the extension of the target file.

 EXAMPLE

   $ @sys$manager:cdsa$symbols
   $ validate /user1/mydirectory/foobar.pcsi

 RETURNS

   CDSA$VALIDATE will return SS$_NORMAL for success and 0 if the validation
   fails, or an error occurs.