1/*	$OpenBSD: mkpath.c,v 1.5 2021/05/17 11:52:10 claudio Exp $ */
2/*
3 * Copyright (c) 1983, 1992, 1993
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the University nor the names of its contributors
15 *    may be used to endorse or promote products derived from this software
16 *    without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31#include <sys/types.h>
32#include <sys/stat.h>
33#include <errno.h>
34#include <stdint.h>
35#include <string.h>
36
37#include "extern.h"
38
39/* Code taken directly from mkdir(1).
40
41 * mkpath -- create directories.
42 *	path     - path
43 */
44int
45mkpath(char *path)
46{
47	struct stat sb;
48	char *slash;
49	int done;
50
51	slash = path;
52
53	for (;;) {
54		slash += strspn(slash, "/");
55		slash += strcspn(slash, "/");
56
57		done = (*slash == '\0');
58		*slash = '\0';
59
60		if (mkdir(path, 0777) != 0) {
61			int mkdir_errno = errno;
62
63			if (stat(path, &sb) == -1) {
64				/* Not there; use mkdir()s errno */
65				errno = mkdir_errno;
66				return (-1);
67			}
68			if (!S_ISDIR(sb.st_mode)) {
69				/* Is there, but isn't a directory */
70				errno = ENOTDIR;
71				return (-1);
72			}
73		}
74
75		if (done)
76			break;
77
78		*slash = '/';
79	}
80
81	return (0);
82}
83