mkdir.c revision 40537 
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 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char const copyright[] =
36"@(#) Copyright (c) 1983, 1992, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)mkdir.c	8.2 (Berkeley) 1/25/94";
43#endif
44static const char rcsid[] =
45	"$Id: mkdir.c,v 1.12 1998/10/20 06:37:01 msmith Exp $";
46#endif /* not lint */
47
48#include <sys/types.h>
49#include <sys/stat.h>
50
51#include <err.h>
52#include <errno.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <string.h>
56#include <unistd.h>
57
58int	build __P((char *, mode_t));
59void	usage __P((void));
60
61int
62main(argc, argv)
63	int argc;
64	char *argv[];
65{
66	int ch, exitval, omode, pflag;
67	mode_t *set = (mode_t *)NULL;
68	char *mode;
69
70	omode = pflag = 0;
71	mode = NULL;
72	while ((ch = getopt(argc, argv, "m:p")) != -1)
73		switch(ch) {
74		case 'p':
75			pflag = 1;
76			break;
77		case 'm':
78			mode = optarg;
79			break;
80		case '?':
81		default:
82			usage();
83		}
84
85	argc -= optind;
86	argv += optind;
87	if (argv[0] == NULL)
88		usage();
89
90	if (mode == NULL) {
91		omode = S_IRWXU | S_IRWXG | S_IRWXO;
92	} else {
93		if ((set = setmode(mode)) == NULL)
94			errx(1, "invalid file mode: %s", mode);
95		omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
96	}
97
98	for (exitval = 0; *argv != NULL; ++argv) {
99		if (pflag) {
100			if (build(*argv, omode))
101				exitval = 1;
102			continue;
103		}
104		if (mkdir(*argv, omode) < 0) {
105			warn("%s", *argv);
106			exitval = 1;
107		}
108		/*
109		 * The mkdir() and umask() calls both honor only the low
110		 * nine bits, so if you try to set a mode including the
111		 * sticky, setuid, setgid bits you lose them.  So chmod().
112		 */
113		if (chmod(*argv, omode) == -1) {
114			warn("%s", *argv);
115			exitval = 1;
116		}
117	}
118	exit(exitval);
119}
120
121int
122build(path, omode)
123	char *path;
124	mode_t omode;
125{
126	struct stat sb;
127	mode_t numask, oumask;
128	int first, last, retval;
129	char *p;
130
131	p = path;
132	oumask = 0;
133	retval = 0;
134	if (p[0] == '/')		/* Skip leading '/'. */
135		++p;
136	for (first = 1, last = 0; !last ; ++p) {
137		if (p[0] == '\0')
138			last = 1;
139		else if (p[0] != '/')
140			continue;
141		*p = '\0';
142		if (p[1] == '\0')
143			last = 1;
144		if (first) {
145			/*
146			 * POSIX 1003.2:
147			 * For each dir operand that does not name an existing
148			 * directory, effects equivalent to those cased by the
149			 * following command shall occcur:
150			 *
151			 * mkdir -p -m $(umask -S),u+wx $(dirname dir) &&
152			 *    mkdir [-m mode] dir
153			 *
154			 * We change the user's umask and then restore it,
155			 * instead of doing chmod's.
156			 */
157			oumask = umask(0);
158			numask = oumask & ~(S_IWUSR | S_IXUSR);
159			(void)umask(numask);
160			first = 0;
161		}
162		if (last)
163			(void)umask(oumask);
164		if (stat(path, &sb)) {
165			if (errno != ENOENT ||
166			    mkdir(path, last ? omode :
167				  S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
168				warn("%s", path);
169				retval = 1;
170				break;
171			}
172                	/*
173                         * The mkdir() and umask() calls both honor only the
174			 * low nine bits, so if you try to set a mode
175			 * including the sticky, setuid, setgid bits you lose
176			 * them. So chmod() the last path component to try
177			 * to do what the caller has asked for.
178                         */
179                    	if (last && (chmod(path, omode) == -1)) {
180				warn("%s", path);
181				retval = 1;
182                        }
183		}
184		else if ((sb.st_mode & S_IFMT) != S_IFDIR) {
185			if (last)
186				errno = EEXIST;
187			else
188				errno = ENOTDIR;
189			warn("%s", path);
190			retval = 1;
191			break;
192		}
193		*p = '/';
194	}
195	if (!first && !last)
196		(void)umask(oumask);
197	return (retval);
198}
199
200void
201usage()
202{
203	(void)fprintf(stderr, "usage: mkdir [-p] [-m mode] directory ...\n");
204	exit (1);
205}
206