'''[file] dirname''' returns the name of the directory a file is located within.


** Synopsis **

    :   '''file dirname''' ''name''



** See Also  **

   [file rootname]:   

   [file tail]:   



** Description **

Returns a name comprised of all of the path components in ''name'' excluding the last element. If ''name'' is a relative file name and only contains one path element, it returns "'''.'''" (or "''':'''" on the pre-OSX Macintosh). If ''name'' refers to a root directory, then the root directory is returned. For example,

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file dirname c:/ ;# -> c:/
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Note that tilde substitution will only be performed if it is necessary to complete the command. For example,

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file dirname ~/src/foo.c ;# -> ~/src
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, whereas

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file dirname ~ ;# -> /home (or something similar).
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