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

/* OPENBSD ORIGINAL: lib/libc/gen/dirname.c */

/*      $OpenBSD: dirname.c,v 1.10 2003/06/17 21:56:23 millert Exp $    */

/*
 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "includes.h"
#ifndef HAVE_DIRNAME

#ifndef lint
static char rcsid[] = "$OpenBSD: dirname.c,v 1.10 2003/06/17 21:56:23 millert Exp $";
#endif /* not lint */

#include <errno.h>
#include <string.h>
#include <sys/param.h>

char *
dirname(const char *path)
{
	static char bname[MAXPATHLEN];
	register const char *endp;

	/* 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--;

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

	/* Either the dir is "/" or there are no slashes */
	if (endp == path) {
		(void)strlcpy(bname, *endp == '/' ? "/" : ".", sizeof bname);
		return(bname);
	} else {
		do {
			endp--;
		} while (endp > path && *endp == '/');
	}

	if (endp - path + 2 > sizeof(bname)) {
		errno = ENAMETOOLONG;
		return(NULL);
	}
	strlcpy(bname, path, endp - path + 2);
	return(bname);
}
#endif
Commit	Line	Data
cdd66111	1	/* OPENBSD ORIGINAL: lib/libc/gen/dirname.c */
cdd66111	2
0fff78ff	3	/* $OpenBSD: dirname.c,v 1.10 2003/06/17 21:56:23 millert Exp $ */
3c0ef626	4
	5	/*
	6	* Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
3c0ef626	7	*
0fff78ff	8	* Permission to use, copy, modify, and distribute this software for any
	9	* purpose with or without fee is hereby granted, provided that the above
	10	* copyright notice and this permission notice appear in all copies.
3c0ef626	11	*
0fff78ff	12	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	13	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	14	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	15	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	16	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	17	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	18	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
3c0ef626	19	*/
	20
	21	#include "includes.h"
	22	#ifndef HAVE_DIRNAME
	23
0fff78ff	24	#ifndef lint
	25	static char rcsid[] = "$OpenBSD: dirname.c,v 1.10 2003/06/17 21:56:23 millert Exp $";
	26	#endif /* not lint */
3c0ef626	27
	28	#include <errno.h>
	29	#include <string.h>
	30	#include <sys/param.h>
	31
	32	char *
0fff78ff	33	dirname(const char *path)
3c0ef626	34	{
	35	static char bname[MAXPATHLEN];
	36	register const char *endp;
	37
	38	/* Empty or NULL string gets treated as "." */
	39	if (path == NULL \|\| *path == '\0') {
41b2f314	40	(void)strlcpy(bname, ".", sizeof bname);
3c0ef626	41	return(bname);
	42	}
	43
	44	/* Strip trailing slashes */
	45	endp = path + strlen(path) - 1;
	46	while (endp > path && *endp == '/')
	47	endp--;
	48
	49	/* Find the start of the dir */
	50	while (endp > path && *endp != '/')
	51	endp--;
	52
	53	/* Either the dir is "/" or there are no slashes */
	54	if (endp == path) {
41b2f314	55	(void)strlcpy(bname, *endp == '/' ? "/" : ".", sizeof bname);
3c0ef626	56	return(bname);
	57	} else {
	58	do {
	59	endp--;
	60	} while (endp > path && *endp == '/');
	61	}
	62
e9a17296	63	if (endp - path + 2 > sizeof(bname)) {
3c0ef626	64	errno = ENAMETOOLONG;
	65	return(NULL);
	66	}
	67	strlcpy(bname, path, endp - path + 2);
	68	return(bname);
	69	}
	70	#endif