2 .\" Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
3 .\" All rights reserved.
5 .\" Redistribution and use in source and binary forms, with or without
6 .\" modification, are permitted provided that the following conditions
8 .\" 1. Redistributions of source code must retain the above copyright
9 .\" notice, this list of conditions and the following disclaimer.
10 .\" 2. Redistributions in binary form must reproduce the above copyright
11 .\" notice, this list of conditions and the following disclaimer in the
12 .\" documentation and/or other materials provided with the distribution.
13 .\" 3. The name of the author may not be used to endorse or promote products
14 .\" derived from this software without specific prior written permission.
16 .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
17 .\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
18 .\" AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
19 .\" THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 .\" EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 .\" PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 .\" OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 .\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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27 .\" $OpenBSD: dirname.3,v 1.9 2000/04/18 03:01:25 aaron Exp $
35 .Nd extract the directory part of a pathname
39 .Fn dirname "const char *path"
46 it returns a pointer to the parent directory of the pathname pointed to by
50 characters are not counted as part of the directory
54 is a null pointer, the empty string, or contains no
58 returns a pointer to the string
60 signifying the current directory.
61 .Sh IMPLEMENTATION NOTES
65 returns a pointer to internal storage space allocated on the first call
66 that will be overwritten
69 Other vendor implementations of
71 may modify the contents of the string passed to
73 this should be taken into account when writing code which calls this function
74 if portability is desired.
76 On successful completion,
78 returns a pointer to the parent directory of
83 fails, a null pointer is returned and the global variable
85 is set to indicate the error.
87 The following error codes may be set in
90 .It Bq Er ENAMETOOLONG
91 The path component to be returned was larger than
106 function first appeared in
111 .An "Todd C. Miller" Aq Todd.Miller@courtesan.com