mkdir.c revision 139969 
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 139969 2005-01-10 08:39:26Z imp $");
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, *set = (mode_t *)NULL;
66	char *mode;
67
68	omode = pflag = 0;
69	mode = NULL;
70	while ((ch = getopt(argc, argv, "m:pv")) != -1)
71		switch(ch) {
72		case 'm':
73			mode = optarg;
74			break;
75		case 'p':
76			pflag = 1;
77			break;
78		case 'v':
79			vflag = 1;
80			break;
81		case '?':
82		default:
83			usage();
84		}
85
86	argc -= optind;
87	argv += optind;
88	if (argv[0] == NULL)
89		usage();
90
91	if (mode == NULL) {
92		omode = S_IRWXU | S_IRWXG | S_IRWXO;
93	} else {
94		if ((set = setmode(mode)) == NULL)
95			errx(1, "invalid file mode: %s", mode);
96		omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
97		free(set);
98	}
99
100	for (exitval = 0; *argv != NULL; ++argv) {
101		success = 1;
102		if (pflag) {
103			if (build(*argv, omode))
104				success = 0;
105		} else if (mkdir(*argv, omode) < 0) {
106			if (errno == ENOTDIR || errno == ENOENT)
107				warn("%s", dirname(*argv));
108			else
109				warn("%s", *argv);
110			success = 0;
111		} else if (vflag)
112			(void)printf("%s\n", *argv);
113
114		if (!success)
115			exitval = 1;
116		/*
117		 * The mkdir() and umask() calls both honor only the low
118		 * nine bits, so if you try to set a mode including the
119		 * sticky, setuid, setgid bits you lose them.  Don't do
120		 * this unless the user has specifically requested a mode,
121		 * as chmod will (obviously) ignore the umask.
122		 */
123		if (success && mode != NULL && chmod(*argv, omode) == -1) {
124			warn("%s", *argv);
125			exitval = 1;
126		}
127	}
128	exit(exitval);
129}
130
131int
132build(char *path, mode_t omode)
133{
134	struct stat sb;
135	mode_t numask, oumask;
136	int first, last, retval;
137	char *p;
138
139	p = path;
140	oumask = 0;
141	retval = 0;
142	if (p[0] == '/')		/* Skip leading '/'. */
143		++p;
144	for (first = 1, last = 0; !last ; ++p) {
145		if (p[0] == '\0')
146			last = 1;
147		else if (p[0] != '/')
148			continue;
149		*p = '\0';
150		if (!last && p[1] == '\0')
151			last = 1;
152		if (first) {
153			/*
154			 * POSIX 1003.2:
155			 * For each dir operand that does not name an existing
156			 * directory, effects equivalent to those cased by the
157			 * following command shall occcur:
158			 *
159			 * mkdir -p -m $(umask -S),u+wx $(dirname dir) &&
160			 *    mkdir [-m mode] dir
161			 *
162			 * We change the user's umask and then restore it,
163			 * instead of doing chmod's.
164			 */
165			oumask = umask(0);
166			numask = oumask & ~(S_IWUSR | S_IXUSR);
167			(void)umask(numask);
168			first = 0;
169		}
170		if (last)
171			(void)umask(oumask);
172		if (mkdir(path, last ? omode : S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
173			if (errno == EEXIST || errno == EISDIR) {
174				if (stat(path, &sb) < 0) {
175					warn("%s", path);
176					retval = 1;
177					break;
178				} else if (!S_ISDIR(sb.st_mode)) {
179					if (last)
180						errno = EEXIST;
181					else
182						errno = ENOTDIR;
183					warn("%s", path);
184					retval = 1;
185					break;
186				}
187			} else {
188				warn("%s", path);
189				retval = 1;
190				break;
191			}
192		} else if (vflag)
193			printf("%s\n", path);
194		if (!last)
195		    *p = '/';
196	}
197	if (!first && !last)
198		(void)umask(oumask);
199	return (retval);
200}
201
202void
203usage(void)
204{
205
206	(void)fprintf(stderr, "usage: mkdir [-pv] [-m mode] directory ...\n");
207	exit (EX_USAGE);
208}
209