4.3BSD-Reno/src/usr.bin/basename/basename.1

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.\" Copyright (c) 1990 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms are permitted provided
.\" that: (1) source distributions retain this entire copyright notice and
.\" comment, and (2) distributions including binaries display the following
.\" acknowledgement:  ``This product includes software developed by the
.\" University of California, Berkeley and its contributors'' in the
.\" documentation or other materials provided with the distribution and in
.\" all advertising materials mentioning features or use of this software.
.\" 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
.\"
.\"     @(#)basename.1	6.4 (Berkeley) 7/24/90
.\"
.Dt BASENAME 1
.Dd July 24, 1990
.Os BSD 4.4
.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
.Sq Li \&/
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,
.Sq Li / ,
or is the same as the
.Ar suffix
argument,
a newline is output.
A non-existant suffix is ignored.
.Pp
.Nm Dirname
deletes the filename portion, beginning
with the last slash
.Sq Li \&/
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.