mkdir.c revision 163213 
1/*-
2 * Copyright (c) 1983, 1992, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if 0
31#ifndef lint
32static char const copyright[] =
33"@(#) Copyright (c) 1983, 1992, 1993\n\
34	The Regents of the University of California.  All rights reserved.\n";
35#endif /* not lint */
36
37#ifndef lint
38static char sccsid[] = "@(#)mkdir.c	8.2 (Berkeley) 1/25/94";
39#endif /* not lint */
40#endif
41#include <sys/cdefs.h>
42__FBSDID("$FreeBSD: head/bin/mkdir/mkdir.c 163213 2006-10-10 20:18:20Z ru $");
43
44#include <sys/types.h>
45#include <sys/stat.h>
46
47#include <err.h>
48#include <errno.h>
49#include <libgen.h>
50#include <stdio.h>
51#include <stdlib.h>
52#include <string.h>
53#include <sysexits.h>
54#include <unistd.h>
55
56static int	build(char *, mode_t);
57static void	usage(void);
58
59int vflag;
60
61int
62main(int argc, char *argv[])
63{
64	int ch, exitval, success, pflag;
65	mode_t omode;
66	void *set = NULL;
67	char *mode;
68
69	omode = pflag = 0;
70	mode = NULL;
71	while ((ch = getopt(argc, argv, "m:pv")) != -1)
72		switch(ch) {
73		case 'm':
74			mode = optarg;
75			break;
76		case 'p':
77			pflag = 1;
78			break;
79		case 'v':
80			vflag = 1;
81			break;
82		case '?':
83		default:
84			usage();
85		}
86
87	argc -= optind;
88	argv += optind;
89	if (argv[0] == NULL)
90		usage();
91
92	if (mode == NULL) {
93		omode = S_IRWXU | S_IRWXG | S_IRWXO;
94	} else {
95		if ((set = setmode(mode)) == NULL)
96			errx(1, "invalid file mode: %s", mode);
97		omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
98		free(set);
99	}
100
101	for (exitval = 0; *argv != NULL; ++argv) {
102		if (pflag) {
103			success = build(*argv, omode);
104		} else if (mkdir(*argv, omode) < 0) {
105			if (errno == ENOTDIR || errno == ENOENT)
106				warn("%s", dirname(*argv));
107			else
108				warn("%s", *argv);
109			success = 0;
110		} else {
111			success = 1;
112			if (vflag)
113				(void)printf("%s\n", *argv);
114		}
115		if (!success)
116			exitval = 1;
117		/*
118		 * The mkdir() and umask() calls both honor only the low
119		 * nine bits, so if you try to set a mode including the
120		 * sticky, setuid, setgid bits you lose them.  Don't do
121		 * this unless the user has specifically requested a mode,
122		 * as chmod will (obviously) ignore the umask.  Do this
123		 * on newly created directories only.
124		 */
125		if (success == 1 && mode != NULL && chmod(*argv, omode) == -1) {
126			warn("%s", *argv);
127			exitval = 1;
128		}
129	}
130	exit(exitval);
131}
132
133
134/*
135 * Returns 1 if a directory has been created,
136 * 2 if it already existed, and 0 on failure.
137 */
138int
139build(char *path, mode_t omode)
140{
141	struct stat sb;
142	mode_t numask, oumask;
143	int first, last, retval;
144	char *p;
145
146	p = path;
147	oumask = 0;
148	retval = 1;
149	if (p[0] == '/')		/* Skip leading '/'. */
150		++p;
151	for (first = 1, last = 0; !last ; ++p) {
152		if (p[0] == '\0')
153			last = 1;
154		else if (p[0] != '/')
155			continue;
156		*p = '\0';
157		if (!last && p[1] == '\0')
158			last = 1;
159		if (first) {
160			/*
161			 * POSIX 1003.2:
162			 * For each dir operand that does not name an existing
163			 * directory, effects equivalent to those caused by the
164			 * following command shall occcur:
165			 *
166			 * mkdir -p -m $(umask -S),u+wx $(dirname dir) &&
167			 *    mkdir [-m mode] dir
168			 *
169			 * We change the user's umask and then restore it,
170			 * instead of doing chmod's.
171			 */
172			oumask = umask(0);
173			numask = oumask & ~(S_IWUSR | S_IXUSR);
174			(void)umask(numask);
175			first = 0;
176		}
177		if (last)
178			(void)umask(oumask);
179		if (mkdir(path, last ? omode : S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
180			if (errno == EEXIST || errno == EISDIR) {
181				if (stat(path, &sb) < 0) {
182					warn("%s", path);
183					retval = 0;
184					break;
185				} else if (!S_ISDIR(sb.st_mode)) {
186					if (last)
187						errno = EEXIST;
188					else
189						errno = ENOTDIR;
190					warn("%s", path);
191					retval = 0;
192					break;
193				}
194				if (last)
195					retval = 2;
196			} else {
197				warn("%s", path);
198				retval = 0;
199				break;
200			}
201		} else if (vflag)
202			printf("%s\n", path);
203		if (!last)
204		    *p = '/';
205	}
206	if (!first && !last)
207		(void)umask(oumask);
208	return (retval);
209}
210
211void
212usage(void)
213{
214
215	(void)fprintf(stderr,
216	    "usage: mkdir [-pv] [-m mode] directory_name ...\n");
217	exit (EX_USAGE);
218}
219