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 1.2 2003/06/17 04:26:42 dillon 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 SYNOPSIS 38.In libgen.h 39.Ft char * 40.Fn basename "const char *path" 41.Sh DESCRIPTION 42The 43.Fn basename 44function 45returns the last component from the pathname pointed to by 46.Fa path , 47deleting any trailing 48.Sq \&/ 49characters. 50If 51.Fa path 52consists entirely of 53.Sq \&/ 54characters, a pointer to the string 55.Qq \&/ 56is returned. 57If 58.Fa path 59is a null pointer or the empty string, a pointer to the string 60.Qq \&. 61is returned. 62.Sh RETURN VALUES 63On successful completion, 64.Fn basename 65returns a pointer to the last component of 66.Fa path . 67.Pp 68If 69.Fn basename 70fails, a null pointer is returned and the global variable 71.Va errno 72is set to indicate the error. 73.Sh ERRORS 74The following error codes may be set in 75.Va errno : 76.Bl -tag -width Er 77.It Bq Er ENAMETOOLONG 78The path component to be returned was larger than 79.Dv MAXPATHLEN . 80.El 81.Sh WARNINGS 82The 83.Fn basename 84function 85returns a pointer to internal static storage space that will be overwritten 86by subsequent calls. 87.Sh SEE ALSO 88.Xr basename 1 , 89.Xr dirname 1 , 90.Xr dirname 3 91.Sh STANDARDS 92The 93.Fn basename 94function conforms to 95.St -xpg4.2 . 96.Sh HISTORY 97The 98.Fn basename 99function first appeared in 100.Ox 2.2 101and 102.Fx 4.2 . 103.Sh AUTHORS 104Todd C. Miller <Todd.Miller@courtesan.com> 105