Editing List of DOS commands (section)

=== TRUENAME ===
Internal command that expands the name of a file, directory, or drive, and display its absolute pathname as the result. It will expand relative pathnames, <kbd>SUBST</kbd> drives, and <samp>JOIN</samp> directories, to find the actual directory.
 
For example, in DOS 7.1, if the current directory is <samp>C:\WINDOWS\SYSTEM</samp>, then
{{sxhl|2=doscon|
C:\WINDOWS\SYSTEM>TRUENAME ..\WIN.INI
C:\WINDOWS\WIN.INI
}}
The argument does not need to refer to an existing file or directory: TRUENAME will output the absolute pathname as if it did. Also TRUENAME does not search in the <samp>PATH</samp>.<br />
For example, in DOS 5, if the current directory is <samp>C:\TEMP</samp>, then <code>TRUENAME command.com</code> will display <samp>C:\TEMP\COMMAND.COM</samp> (which does not exist), not <samp>C:\DOS\COMMAND.COM</samp> (which does and is in the <kbd>PATH</kbd>).

This command displays the [[UNC path]]names of mapped network or local CD drives. This command is an undocumented DOS command. The help switch "<kbd>/?</kbd>" defines it as a "Reserved command name". It is available in MS-DOS version 5.00 and later, including the DOS 7 and 8 in Windows 95/98/ME. The C library function <code>realpath</code> performs this function. The Microsoft Windows NT command processors do not support this command, including the versions of command.com for NT.