mkdir.c revision 90110 
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 90110 2002-02-02 06:48:10Z imp $";
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(char *, mode_t);
61void	usage(void);
62
63int vflag;
64
65int
66main(int argc, char *argv[])
67{
68	int ch, exitval, success, omode, pflag;
69	mode_t *set = (mode_t *)NULL;
70	char *mode;
71
72	omode = pflag = 0;
73	mode = NULL;
74	while ((ch = getopt(argc, argv, "m:pv")) != -1)
75		switch(ch) {
76		case 'm':
77			mode = optarg;
78			break;
79		case 'p':
80			pflag = 1;
81			break;
82		case 'v':
83			vflag = 1;
84			break;
85		case '?':
86		default:
87			usage();
88		}
89
90	argc -= optind;
91	argv += optind;
92	if (argv[0] == NULL)
93		usage();
94
95	if (mode == NULL) {
96		omode = S_IRWXU | S_IRWXG | S_IRWXO;
97	} else {
98		if ((set = setmode(mode)) == NULL)
99			errx(1, "invalid file mode: %s", mode);
100		omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
101		free(set);
102	}
103
104	for (exitval = 0; *argv != NULL; ++argv) {
105		success = 1;
106		if (pflag) {
107			if (build(*argv, omode))
108				success = 0;
109		} else if (mkdir(*argv, omode) < 0) {
110			if (errno == ENOTDIR || errno == ENOENT)
111				warn("%s", dirname(*argv));
112			else
113				warn("%s", *argv);
114			success = 0;
115		} else if (vflag)
116			(void)printf("%s\n", *argv);
117
118		if (!success)
119			exitval = 1;
120		/*
121		 * The mkdir() and umask() calls both honor only the low
122		 * nine bits, so if you try to set a mode including the
123		 * sticky, setuid, setgid bits you lose them.  Don't do
124		 * this unless the user has specifically requested a mode,
125		 * as chmod will (obviously) ignore the umask.
126		 */
127		if (success && mode != NULL && chmod(*argv, omode) == -1) {
128			warn("%s", *argv);
129			exitval = 1;
130		}
131	}
132	exit(exitval);
133}
134
135int
136build(char *path, mode_t omode)
137{
138	struct stat sb;
139	mode_t numask, oumask;
140	int first, last, retval;
141	char *p;
142
143	p = path;
144	oumask = 0;
145	retval = 0;
146	if (p[0] == '/')		/* Skip leading '/'. */
147		++p;
148	for (first = 1, last = 0; !last ; ++p) {
149		if (p[0] == '\0')
150			last = 1;
151		else if (p[0] != '/')
152			continue;
153		*p = '\0';
154		if (p[1] == '\0')
155			last = 1;
156		if (first) {
157			/*
158			 * POSIX 1003.2:
159			 * For each dir operand that does not name an existing
160			 * directory, effects equivalent to those cased by the
161			 * following command shall occcur:
162			 *
163			 * mkdir -p -m $(umask -S),u+wx $(dirname dir) &&
164			 *    mkdir [-m mode] dir
165			 *
166			 * We change the user's umask and then restore it,
167			 * instead of doing chmod's.
168			 */
169			oumask = umask(0);
170			numask = oumask & ~(S_IWUSR | S_IXUSR);
171			(void)umask(numask);
172			first = 0;
173		}
174		if (last)
175			(void)umask(oumask);
176		if (stat(path, &sb)) {
177			if (errno != ENOENT ||
178			    mkdir(path, last ? omode :
179				  S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
180				warn("%s", path);
181				retval = 1;
182				break;
183			} else if (vflag)
184				printf("%s\n", path);
185		}
186		else if ((sb.st_mode & S_IFMT) != S_IFDIR) {
187			if (last)
188				errno = EEXIST;
189			else
190				errno = ENOTDIR;
191			warn("%s", path);
192			retval = 1;
193			break;
194		}
195		if (!last)
196		    *p = '/';
197	}
198	if (!first && !last)
199		(void)umask(oumask);
200	return (retval);
201}
202
203void
204usage(void)
205{
206
207	(void)fprintf(stderr, "usage: mkdir [-pv] [-m mode] directory ...\n");
208	exit (EX_USAGE);
209}
210