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 1.12 2000/04/18 03:01:25 aaron Exp $ 28.\" $FreeBSD$ 29.\" 30.Dd August 17, 1997 31.Dt BASENAME 3 32.Os 33.Sh NAME 34.Nm basename 35.Nd extract the base portion of a pathname 36.Sh SYNOPSIS 37.Fd #include <libgen.h> 38.Ft char * 39.Fn basename "const char *path" 40.Sh DESCRIPTION 41The 42.Fn basename 43function 44returns the last component from the pathname pointed to by 45.Ar path , 46deleting any trailing 47.Sq \&/ 48characters. 49If 50.Ar path 51consists entirely of 52.Sq \&/ 53characters, a pointer to the string 54.Qq \&/ 55is returned. 56If 57.Ar path 58is a null pointer or the empty string, a pointer to the string 59.Qq \&. 60is returned. 61.Sh RETURN VALUES 62On successful completion, 63.Fn basename 64returns a pointer to the last component of 65.Ar path . 66.Pp 67If 68.Fn basename 69fails, a null pointer is returned and the global variable 70.Va errno 71is set to indicate the error. 72.Sh ERRORS 73The following error codes may be set in 74.Va errno : 75.Bl -tag -width Er 76.It Bq Er ENAMETOOLONG 77The path component to be returned was larger than 78.Dv MAXPATHLEN . 79.El 80.Sh WARNINGS 81.Fn basename 82returns a pointer to internal static storage space that will be overwritten 83by subsequent calls. 84.Sh SEE ALSO 85.Xr basename 1 , 86.Xr dirname 1 , 87.Xr dirname 3 88.Sh STANDARDS 89The 90.Fn basename 91function conforms to 92.St -xpg4.2 . 93.Sh HISTORY 94The 95.Fn basename 96function first appeared in 97.Ox 2.2 98and 99.Fx 4.2 . 100.Sh AUTHORS 101Todd C. Miller <Todd.Miller@courtesan.com> 102