1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1983, 1992, 1993
5 *	The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#if 0
33#ifndef lint
34static char const copyright[] =
35"@(#) Copyright (c) 1983, 1992, 1993\n\
36	The Regents of the University of California.  All rights reserved.\n";
37#endif /* not lint */
38
39#ifndef lint
40static char sccsid[] = "@(#)mkdir.c	8.2 (Berkeley) 1/25/94";
41#endif /* not lint */
42#endif
43#include <sys/cdefs.h>
44__FBSDID("$FreeBSD$");
45
46#include <sys/types.h>
47#include <sys/stat.h>
48
49#include <err.h>
50#include <errno.h>
51#include <libgen.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55#include <sysexits.h>
56#include <unistd.h>
57
58static int	build(char *, mode_t);
59static void	usage(void);
60
61static int	vflag;
62
63int
64main(int argc, char *argv[])
65{
66	int ch, exitval, success, pflag;
67	mode_t omode;
68	void *set = NULL;
69	char *mode;
70
71	omode = pflag = 0;
72	mode = NULL;
73	while ((ch = getopt(argc, argv, "m:pv")) != -1)
74		switch(ch) {
75		case 'm':
76			mode = optarg;
77			break;
78		case 'p':
79			pflag = 1;
80			break;
81		case 'v':
82			vflag = 1;
83			break;
84		case '?':
85		default:
86			usage();
87		}
88
89	argc -= optind;
90	argv += optind;
91	if (argv[0] == NULL)
92		usage();
93
94	if (mode == NULL) {
95		omode = S_IRWXU | S_IRWXG | S_IRWXO;
96	} else {
97		if ((set = setmode(mode)) == NULL)
98			errx(1, "invalid file mode: %s", mode);
99		omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
100		free(set);
101	}
102
103	for (exitval = 0; *argv != NULL; ++argv) {
104		if (pflag) {
105			success = build(*argv, omode);
106		} else if (mkdir(*argv, omode) < 0) {
107			if (errno == ENOTDIR || errno == ENOENT)
108				warn("%s", dirname(*argv));
109			else
110				warn("%s", *argv);
111			success = 0;
112		} else {
113			success = 1;
114			if (vflag)
115				(void)printf("%s\n", *argv);
116		}
117		if (!success)
118			exitval = 1;
119		/*
120		 * The mkdir() and umask() calls both honor only the low
121		 * nine bits, so if you try to set a mode including the
122		 * sticky, setuid, setgid bits you lose them.  Don't do
123		 * this unless the user has specifically requested a mode,
124		 * as chmod will (obviously) ignore the umask.  Do this
125		 * on newly created directories only.
126		 */
127		if (success == 1 && mode != NULL && chmod(*argv, omode) == -1) {
128			warn("%s", *argv);
129			exitval = 1;
130		}
131	}
132	exit(exitval);
133}
134
135
136/*
137 * Returns 1 if a directory has been created,
138 * 2 if it already existed, and 0 on failure.
139 */
140static int
141build(char *path, mode_t omode)
142{
143	struct stat sb;
144	mode_t numask, oumask;
145	int first, last, retval;
146	char *p;
147
148	p = path;
149	oumask = 0;
150	retval = 1;
151	if (p[0] == '/')		/* Skip leading '/'. */
152		++p;
153	for (first = 1, last = 0; !last ; ++p) {
154		if (p[0] == '\0')
155			last = 1;
156		else if (p[0] != '/')
157			continue;
158		*p = '\0';
159		if (!last && p[1] == '\0')
160			last = 1;
161		if (first) {
162			/*
163			 * POSIX 1003.2:
164			 * For each dir operand that does not name an existing
165			 * directory, effects equivalent to those caused by the
166			 * following command shall occcur:
167			 *
168			 * mkdir -p -m $(umask -S),u+wx $(dirname dir) &&
169			 *    mkdir [-m mode] dir
170			 *
171			 * We change the user's umask and then restore it,
172			 * instead of doing chmod's.
173			 */
174			oumask = umask(0);
175			numask = oumask & ~(S_IWUSR | S_IXUSR);
176			(void)umask(numask);
177			first = 0;
178		}
179		if (last)
180			(void)umask(oumask);
181		if (mkdir(path, last ? omode : S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
182			if (errno == EEXIST || errno == EISDIR) {
183				if (stat(path, &sb) < 0) {
184					warn("%s", path);
185					retval = 0;
186					break;
187				} else if (!S_ISDIR(sb.st_mode)) {
188					if (last)
189						errno = EEXIST;
190					else
191						errno = ENOTDIR;
192					warn("%s", path);
193					retval = 0;
194					break;
195				}
196				if (last)
197					retval = 2;
198			} else {
199				warn("%s", path);
200				retval = 0;
201				break;
202			}
203		} else if (vflag)
204			printf("%s\n", path);
205		if (!last)
206		    *p = '/';
207	}
208	if (!first && !last)
209		(void)umask(oumask);
210	return (retval);
211}
212
213static void
214usage(void)
215{
216
217	(void)fprintf(stderr,
218	    "usage: mkdir [-pv] [-m mode] directory_name ...\n");
219	exit (EX_USAGE);
220}
221