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.\" Copyright (c) 1990, 1993, 1994
.\" The Regents of the University of California. All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" the Institute of Electrical and Electronics Engineers, Inc.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the University of
.\" California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)basename.1 8.2 (Berkeley) 4/18/94
.\" $Id$
.\"
.Dd April 18, 1994
.Dt BASENAME 1
.Os
.Sh NAME
.Nm basename , dirname
.Nd return filename or directory portion of pathname
.Sh SYNOPSIS
.Nm basename
.Ar string
.Op Ar suffix
.Nm dirname
.Ar string
.Sh DESCRIPTION
.Nm Basename
deletes any prefix ending with the last slash
.Ql \&/
character present in
.Ar string ,
and a
.Ar suffix ,
if given.
The resulting filename is written to the standard output.
If
.Ar string
ends in the slash character,
.Ql / ,
or is the same as the
.Ar suffix
argument,
a newline is output.
A non-existent suffix is ignored.
.Pp
.Nm Dirname
deletes the filename portion, beginning
with the last slash
.Ql \&/
character to the end of
.Ar string ,
and writes the result to the standard output.
.Sh EXAMPLES
The following line sets the shell variable
.Ev FOO
to
.Pa /usr/bin .
.Pp
.Dl FOO=`dirname /usr/bin/trail`
.Pp
Both the
.Nm basename
and
.Nm dirname
exit 0 on success, and >0 if an error occurs.
.Sh SEE ALSO
.Xr csh 1 ,
.Xr sh 1
.Sh STANDARDS
The
.Nm basename
and
.Nm dirname
functions are expected to be POSIX 1003.2 compatible.
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