mkdir.c revision 71029 
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  "$FreeBSD: head/bin/mkdir/mkdir.c 71029 2001-01-14 12:08:50Z alfred $";
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 <libgen.h>
54#include <stdio.h>
55#include <stdlib.h>
56#include <string.h>
57#include <sysexits.h>
58#include <unistd.h>
59
60int	build __P((char *, mode_t));
61void	usage __P((void));
62
63int vflag;
64
65int
66main(argc, argv)
67	int argc;
68	char *argv[];
69{
70	int ch, exitval, success, omode, pflag;
71	mode_t *set = (mode_t *)NULL;
72	char *mode;
73
74	omode = pflag = 0;
75	mode = NULL;
76	while ((ch = getopt(argc, argv, "m:pv")) != -1)
77		switch(ch) {
78		case 'm':
79			mode = optarg;
80			break;
81		case 'p':
82			pflag = 1;
83			break;
84		case 'v':
85			vflag = 1;
86			break;
87		case '?':
88		default:
89			usage();
90		}
91
92	argc -= optind;
93	argv += optind;
94	if (argv[0] == NULL)
95		usage();
96
97	if (mode == NULL) {
98		omode = S_IRWXU | S_IRWXG | S_IRWXO;
99	} else {
100		if ((set = setmode(mode)) == NULL)
101			errx(1, "invalid file mode: %s", mode);
102		omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
103		free(set);
104	}
105
106	for (exitval = 0; *argv != NULL; ++argv) {
107		success = 1;
108		if (pflag) {
109			if (build(*argv, omode))
110				success = 0;
111		} else if (mkdir(*argv, omode) < 0) {
112			if (errno == ENOTDIR || errno == ENOENT)
113				warn("%s", dirname(*argv));
114			else
115				warn("%s", *argv);
116			success = 0;
117		} else if (vflag)
118			(void)printf("%s\n", *argv);
119
120		if (!success)
121			exitval = 1;
122		/*
123		 * The mkdir() and umask() calls both honor only the low
124		 * nine bits, so if you try to set a mode including the
125		 * sticky, setuid, setgid bits you lose them.  Don't do
126		 * this unless the user has specifically requested a mode,
127		 * as chmod will (obviously) ignore the umask.
128		 */
129		if (success && mode != NULL && chmod(*argv, omode) == -1) {
130			warn("%s", *argv);
131			exitval = 1;
132		}
133	}
134	exit(exitval);
135}
136
137int
138build(path, omode)
139	char *path;
140	mode_t omode;
141{
142	struct stat sb;
143	mode_t numask, oumask;
144	int first, last, retval;
145	char *p;
146
147	p = path;
148	oumask = 0;
149	retval = 0;
150	if (p[0] == '/')		/* Skip leading '/'. */
151		++p;
152	for (first = 1, last = 0; !last ; ++p) {
153		if (p[0] == '\0')
154			last = 1;
155		else if (p[0] != '/')
156			continue;
157		*p = '\0';
158		if (p[1] == '\0')
159			last = 1;
160		if (first) {
161			/*
162			 * POSIX 1003.2:
163			 * For each dir operand that does not name an existing
164			 * directory, effects equivalent to those cased by the
165			 * following command shall occcur:
166			 *
167			 * mkdir -p -m $(umask -S),u+wx $(dirname dir) &&
168			 *    mkdir [-m mode] dir
169			 *
170			 * We change the user's umask and then restore it,
171			 * instead of doing chmod's.
172			 */
173			oumask = umask(0);
174			numask = oumask & ~(S_IWUSR | S_IXUSR);
175			(void)umask(numask);
176			first = 0;
177		}
178		if (last)
179			(void)umask(oumask);
180		if (stat(path, &sb)) {
181			if (errno != ENOENT ||
182			    mkdir(path, last ? omode :
183				  S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
184				warn("%s", path);
185				retval = 1;
186				break;
187			} else if (vflag)
188				printf("%s\n", path);
189		}
190		else if ((sb.st_mode & S_IFMT) != S_IFDIR) {
191			if (last)
192				errno = EEXIST;
193			else
194				errno = ENOTDIR;
195			warn("%s", path);
196			retval = 1;
197			break;
198		}
199		if (!last)
200		    *p = '/';
201	}
202	if (!first && !last)
203		(void)umask(oumask);
204	return (retval);
205}
206
207void
208usage()
209{
210
211	(void)fprintf(stderr, "usage: mkdir [-pv] [-m mode] directory ...\n");
212	exit (EX_USAGE);
213}
214