1.\" 2.\" Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 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. 15.\" 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 24.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25.\" ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26.\" 27.\" $OpenBSD: basename.3,v 1.14 2001/08/06 10:42:25 mpech Exp $ 28.\" 29.Dd August 17, 1997 30.Dt BASENAME 3 31.Os 32.Sh NAME 33.Nm basename 34.Nd extract the base portion of a pathname 35.Sh SYNOPSIS 36.Fd #include <libgen.h> 37.Ft char * 38.Fn basename "const char *path" 39.Sh DESCRIPTION 40The 41.Fn basename 42function returns the last component from the pathname pointed to by 43.Ar path , 44deleting any trailing 45.Sq \&/ 46characters. 47If 48.Ar path 49consists entirely of 50.Sq \&/ 51characters, a pointer to the string 52.Qq \&/ 53is returned. 54If 55.Ar path 56is a null pointer or the empty string, a pointer to the string 57.Qq \&. 58is returned. 59.Sh RETURN VALUES 60On successful completion, 61.Fn basename 62returns a pointer to the last component of 63.Ar path . 64.Pp 65If 66.Fn basename 67fails, a null pointer is returned and the global variable 68.Va errno 69is set to indicate the error. 70.Sh ERRORS 71The following error codes may be set in 72.Va errno : 73.Bl -tag -width Er 74.It Bq Er ENAMETOOLONG 75The path component to be returned was larger than 76.Dv MAXPATHLEN . 77.El 78.Sh WARNINGS 79.Fn basename 80returns a pointer to internal static storage space that will be overwritten 81by subsequent calls. 82.Sh SEE ALSO 83.Xr basename 1 , 84.Xr dirname 1 , 85.Xr dirname 3 86.Sh STANDARDS 87The 88.Fn basename 89function conforms to 90.St -xpg4.2 . 91.Sh HISTORY 92The 93.Fn basename 94function first appeared in 95.Ox 2.2 . 96.Sh AUTHORS 97Todd C. Miller <Todd.Miller@courtesan.com> 98