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87 lines
2.2 KiB
Groff
87 lines
2.2 KiB
Groff
.\" $OpenBSD: basename.3,v 1.20 2007/05/31 19:19:28 jmc Exp $
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.\"
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.\" Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
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.\"
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.\" Permission to use, copy, modify, and distribute this software for any
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.\" purpose with or without fee is hereby granted, provided that the above
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.\" copyright notice and this permission notice appear in all copies.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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.\"
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.Dd May 22, 2017
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.Dt BASENAME 3
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.Os
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.Sh NAME
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.Nm basename
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.Nd extract the base portion of a pathname
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.Sh SYNOPSIS
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.In libgen.h
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.Ft char *
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.Fn basename "char *path"
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.Sh DESCRIPTION
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The
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.Fn basename
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function returns the last component from the pathname pointed to by
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.Fa path ,
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deleting any trailing
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.Sq \&/
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characters.
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.Sh IMPLEMENTATION NOTES
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This implementation of
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.Fn basename
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uses the buffer provided by the caller to store the resulting pathname
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component.
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Other vendor implementations may return a pointer to internal storage
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space instead.
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The advantage of the former approach is that it ensures thread-safety,
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while also placing no upper limit on the supported length of the
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pathname.
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.Sh RETURN VALUES
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If
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.Fa path
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consists entirely of
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.Sq \&/
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characters, a pointer to the string
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.Qq \&/
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is returned.
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If
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.Fa path
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is a null pointer or the empty string, a pointer to the string
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.Qq \&.
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is returned.
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Otherwise,
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it returns a pointer to the last component of
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.Fa path .
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.Sh SEE ALSO
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.Xr basename 1 ,
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.Xr dirname 1 ,
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.Xr dirname 3
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.Sh STANDARDS
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The
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.Fn basename
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function conforms to
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.St -xpg4.2 .
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.Sh HISTORY
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The
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.Fn basename
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function first appeared in
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.Ox 2.2
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and
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.Fx 4.2 .
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.Pp
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In
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.Fx 12.0 ,
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this function was reimplemented to store its result in the provided
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input buffer.
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There is no longer any need to use the
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.Fn basename_r
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function.
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.Sh AUTHORS
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.An Nuxi, the Netherlands
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