GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/gen/basename.c Lines: 12 21 57.1 %
Date: 2017-11-07 Branches: 9 18 50.0 %

Line Branch Exec Source
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/*	$OpenBSD: basename.c,v 1.15 2013/09/30 12:02:32 millert Exp $	*/
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/*
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 * Copyright (c) 1997, 2004 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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#include <errno.h>
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#include <libgen.h>
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#include <limits.h>
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#include <string.h>
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char *
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basename(const char *path)
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{
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	static char bname[PATH_MAX];
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	size_t len;
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	const char *endp, *startp;
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	/* Empty or NULL string gets treated as "." */
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	if (path == NULL || *path == '\0') {
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		bname[0] = '.';
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		bname[1] = '\0';
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		return (bname);
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	}
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	/* Strip any trailing slashes */
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	endp = path + strlen(path) - 1;
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	while (endp > path && *endp == '/')
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		endp--;
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	/* All slashes becomes "/" */
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	if (endp == path && *endp == '/') {
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		bname[0] = '/';
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		bname[1] = '\0';
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		return (bname);
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	}
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	/* Find the start of the base */
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	startp = endp;
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	while (startp > path && *(startp - 1) != '/')
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		startp--;
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	len = endp - startp + 1;
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	if (len >= sizeof(bname)) {
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		errno = ENAMETOOLONG;
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		return (NULL);
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	}
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	memcpy(bname, startp, len);
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	bname[len] = '\0';
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	return (bname);
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}