[gssapi-openssh.git] / openssh / openbsd-compat / basename.c

/*	$OpenBSD: basename.c,v 1.8 2002/06/09 05:03:59 deraadt Exp $	*/

/*
 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
 * All rights reserved.
 *
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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.
 */
#include "includes.h"

#if !defined(HAVE_BASENAME)

#ifndef lint
static char rcsid[] = "$OpenBSD: basename.c,v 1.8 2002/06/09 05:03:59 deraadt Exp $";
#endif /* not lint */

char *
basename(const char *path)
{
	static char bname[MAXPATHLEN];
	register const char *endp, *startp;

	/* Empty or NULL string gets treated as "." */
	if (path == NULL || *path == '\0') {
		(void)strlcpy(bname, ".", sizeof bname);
		return(bname);
	}

	/* Strip trailing slashes */
	endp = path + strlen(path) - 1;
	while (endp > path && *endp == '/')
		endp--;

	/* All slashes become "/" */
	if (endp == path && *endp == '/') {
		(void)strlcpy(bname, "/", sizeof bname);
		return(bname);
	}

	/* Find the start of the base */
	startp = endp;
	while (startp > path && *(startp - 1) != '/')
		startp--;

	if (endp - startp + 2 > sizeof(bname)) {
		errno = ENAMETOOLONG;
		return(NULL);
	}
	strlcpy(bname, startp, endp - startp + 2);
	return(bname);
}

#endif /* !defined(HAVE_BASENAME) */
Commit	Line	Data
1c14df9e	1	/* $OpenBSD: basename.c,v 1.8 2002/06/09 05:03:59 deraadt Exp $ */
	2
	3	/*
	4	* Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
	5	* All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* 3. The name of the author may not be used to endorse or promote products
	16	* derived from this software without specific prior written permission.
	17	*
	18	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
	19	* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
	20	* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
	21	* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	22	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	23	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
	24	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
	25	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
	26	* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
	27	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	28	*/
	29	#include "includes.h"
	30
	31	#if !defined(HAVE_BASENAME)
	32
	33	#ifndef lint
	34	static char rcsid[] = "$OpenBSD: basename.c,v 1.8 2002/06/09 05:03:59 deraadt Exp $";
	35	#endif /* not lint */
	36
	37	char *
	38	basename(const char *path)
	39	{
	40	static char bname[MAXPATHLEN];
	41	register const char endp, startp;
	42
	43	/* Empty or NULL string gets treated as "." */
	44	if (path == NULL \|\| *path == '\0') {
	45	(void)strlcpy(bname, ".", sizeof bname);
	46	return(bname);
	47	}
	48
	49	/* Strip trailing slashes */
	50	endp = path + strlen(path) - 1;
	51	while (endp > path && *endp == '/')
	52	endp--;
	53
	54	/* All slashes become "/" */
	55	if (endp == path && *endp == '/') {
	56	(void)strlcpy(bname, "/", sizeof bname);
	57	return(bname);
	58	}
	59
	60	/* Find the start of the base */
	61	startp = endp;
	62	while (startp > path && *(startp - 1) != '/')
	63	startp--;
	64
65	if (endp - startp + 2 > sizeof(bname)) {
66	errno = ENAMETOOLONG;
67	return(NULL);
68	}
69	strlcpy(bname, startp, endp - startp + 2);
70	return(bname);
71	}
72
73	#endif /* !defined(HAVE_BASENAME) */