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.\" 30.Dd January 4, 2020 31.Dt BASENAME 3 32.Os 33.Sh NAME 34.Nm basename 35.Nd extract the base portion of a pathname 36.Sh LIBRARY 37.Lb libc 38.Sh SYNOPSIS 39.In libgen.h 40.Ft char * 41.Fn basename "char *path" 42.Sh DESCRIPTION 43The 44.Fn basename 45function 46returns the last component from the pathname pointed to by 47.Fa path , 48deleting any trailing 49.Sq \&/ 50characters. 51If 52.Fa path 53consists entirely of 54.Sq \&/ 55characters, a pointer to the string 56.Qq \&/ 57is returned. 58If 59.Fa path 60is a null pointer or the empty string, a pointer to the string 61.Qq \&. 62is returned. 63.Sh RETURN VALUES 64On successful completion, 65.Fn basename 66returns a pointer to the last component of 67.Fa path . 68.Pp 69If 70.Fn basename 71fails, a null pointer is returned and the global variable 72.Va errno 73is set to indicate the error. 74.Sh ERRORS 75The following error codes may be set in 76.Va errno : 77.Bl -tag -width Er 78.It Bq Er ENAMETOOLONG 79The path component to be returned was larger than 80.Dv MAXPATHLEN . 81.El 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 96and 97.Fx 4.2 . 98.Sh AUTHORS 99.An Todd C. Miller Aq Mt Todd.Miller@courtesan.com 100