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https://github.com/freebsd/freebsd-src
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559a218c9b
These sys/cdefs.h are not needed. Purge them. They are mostly left-over from the $FreeBSD$ removal. A few in libc are still required for macros that cdefs.h defines. Keep those. Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D42385
71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
/*-
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* Copyright (c) 2015-2016 Nuxi, https://nuxi.nl/
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <libgen.h>
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#include <string.h>
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char *
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(dirname)(char *path)
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{
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char *end;
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/*
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* If path is a null pointer or points to an empty string,
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* dirname() shall return a pointer to the string ".".
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*/
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if (path == NULL || *path == '\0')
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return (__DECONST(char *, "."));
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/* Find end of last pathname component. */
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end = path + strlen(path);
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while (end > path + 1 && *(end - 1) == '/')
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--end;
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/* Strip off the last pathname component. */
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while (end > path && *(end - 1) != '/')
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--end;
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/*
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* If path does not contain a '/', then dirname() shall return a
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* pointer to the string ".".
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*/
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if (end == path) {
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path[0] = '.';
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path[1] = '\0';
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return (path);
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}
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/*
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* Remove trailing slashes from the resulting directory name. Ensure
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* that at least one character remains.
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*/
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while (end > path + 1 && *(end - 1) == '/')
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--end;
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/* Null terminate directory name and return it. */
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*end = '\0';
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return (path);
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}
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