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: src/lib/libc/gen/basename.3,v 1.1.2.5 2003/03/15 15:11:05 trhodes Exp $ 29.\" $DragonFly: src/lib/libc/gen/basename.3,v 1.3 2007/08/18 20:48:47 swildner Exp $ 30.\" 31.Dd August 17, 1997 32.Dt BASENAME 3 33.Os 34.Sh NAME 35.Nm basename 36.Nd extract the base portion of a pathname 37.Sh LIBRARY 38.Lb libc 39.Sh SYNOPSIS 40.In libgen.h 41.Ft char * 42.Fn basename "const char *path" 43.Sh DESCRIPTION 44The 45.Fn basename 46function 47returns the last component from the pathname pointed to by 48.Fa path , 49deleting any trailing 50.Sq \&/ 51characters. 52If 53.Fa path 54consists entirely of 55.Sq \&/ 56characters, a pointer to the string 57.Qq \&/ 58is returned. 59If 60.Fa path 61is a null pointer or the empty string, a pointer to the string 62.Qq \&. 63is returned. 64.Sh RETURN VALUES 65On successful completion, 66.Fn basename 67returns a pointer to the last component of 68.Fa path . 69.Pp 70If 71.Fn basename 72fails, a null pointer is returned and the global variable 73.Va errno 74is set to indicate the error. 75.Sh ERRORS 76The following error codes may be set in 77.Va errno : 78.Bl -tag -width Er 79.It Bq Er ENAMETOOLONG 80The path component to be returned was larger than 81.Dv MAXPATHLEN . 82.El 83.Sh WARNINGS 84The 85.Fn basename 86function 87returns a pointer to internal static storage space that will be overwritten 88by subsequent calls. 89.Sh SEE ALSO 90.Xr basename 1 , 91.Xr dirname 1 , 92.Xr dirname 3 93.Sh STANDARDS 94The 95.Fn basename 96function conforms to 97.St -xpg4.2 . 98.Sh HISTORY 99The 100.Fn basename 101function first appeared in 102.Ox 2.2 103and 104.Fx 4.2 . 105.Sh AUTHORS 106.An Todd C. Miller Aq Mt Todd.Miller@courtesan.com 107