GENWiki

1) TRUENAME

  Internal DOS 5.0 command.  Canonicalize a filename or path (using
  DOS interrupt 21h, function 60) prints the actual directory.

  SYNTAX

  TRUENAME filename      prints the complete path to file

  TRUENAME directory     prints the complete path to directory

  Note: If the path is in a network, it starts with a \\machine-name

                            Michael Larsson

  TRUENAME is analogous to the "whence" command in the UNIX Korn
  shell.  It returns the real fully qualified pathname for a command.

  TRUENAME is useful in networks, where a physical drive may be mapped
  to a logical volume, and the user needs to know the physical location
  of the file.  It ignores the DOS SUBST, and JOIN commands, or network
  MAPped drives.

  It is an undocumented MS/DOS feature, but is documented in 4DOS as
  follows:

  SYNTAX        (Internal DOS 5.0 / 4DOS)

TRUENAME [d:][path]filename

  PURPOSE

  Returns a fully qualified filename.

  COMMENTS

  TRUENAME will see "through" JOIN and SUBST commands, and requires
  MS-DOS 3.0 or above.

  EXAMPLE

  The following command uses TRUENAME to get the true pathname for a
  file:

  c:\> subst d: c:\util\test
  c:\> truename d:\test.exe

  c:\util\test\test.exe

                            Dennis McCunney

  TRUENAME : will reveal the full name drive and path of the filename.
  If you specify a wildcard ('*') in the filename, it will expand
  the filename to use question marks instead. If the path includes
  the ..\ sequence, TRUENAME will examine the directory structure and
  calculate the path.  Stranger still, the line:

      TRUENAME \CRONK\FLIBBET\..\ART
      produces the response:
      C:\CRONK\ART

  even if the directories \CRONK\FLIBBET and the file ART don't exist!
  Don't expect this command to work across networks.

                            PC Magazine #212 Pg. 48-49
                            Forwarded by:
                            Rodney Atkins