1 /* $NetBSD: mkdir.c,v 1.39 2021/09/13 22:46:02 kre Exp $ */
2
3 /*
4 * Copyright (c) 1983, 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 __COPYRIGHT("@(#) Copyright (c) 1983, 1992, 1993\
35 The Regents of the University of California. All rights reserved.");
36 #endif /* not lint */
37
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)mkdir.c 8.2 (Berkeley) 1/25/94";
41 #else
42 __RCSID("$NetBSD: mkdir.c,v 1.39 2021/09/13 22:46:02 kre Exp $");
43 #endif
44 #endif /* not lint */
45
46 #include <sys/param.h>
47 #include <sys/stat.h>
48 #include <sys/types.h>
49
50 #include <err.h>
51 #include <errno.h>
52 #include <locale.h>
53 #include <stdio.h>
54 #include <stdlib.h>
55 #include <string.h>
56 #include <unistd.h>
57
58 static int mkpath(char *, mode_t, mode_t);
59 __dead static void usage(void);
60
61 int
main(int argc,char * argv[])62 main(int argc, char *argv[])
63 {
64 int ch, exitval, pflag;
65 void *set;
66 mode_t mode, dir_mode;
67
68 setprogname(argv[0]);
69 (void)setlocale(LC_ALL, "");
70
71 /*
72 * The default file mode is a=rwx (0777) with selected permissions
73 * removed in accordance with the file mode creation mask. For
74 * intermediate path name components, the mode is the default modified
75 * by u+wx so that the subdirectories can always be created.
76 */
77 mode = (S_IRWXU | S_IRWXG | S_IRWXO) & ~umask(0);
78 dir_mode = mode | S_IWUSR | S_IXUSR;
79
80 pflag = 0;
81 while ((ch = getopt(argc, argv, "m:p")) != -1)
82 switch (ch) {
83 case 'p':
84 pflag = 1;
85 break;
86 case 'm':
87 if ((set = setmode(optarg)) == NULL) {
88 err(EXIT_FAILURE, "Cannot set file mode `%s'",
89 optarg);
90 /* NOTREACHED */
91 }
92 mode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
93 free(set);
94 break;
95 case '?':
96 default:
97 usage();
98 /* NOTREACHED */
99 }
100 argc -= optind;
101 argv += optind;
102
103 if (*argv == NULL) {
104 usage();
105 /* NOTREACHED */
106 }
107
108 for (exitval = EXIT_SUCCESS; *argv != NULL; ++argv) {
109 #ifdef notdef
110 char *slash;
111
112 /* Kernel takes care of this */
113 /* Remove trailing slashes, per POSIX. */
114 slash = strrchr(*argv, '\0');
115 while (--slash > *argv && *slash == '/')
116 *slash = '\0';
117 #endif
118
119 if (pflag) {
120 if (mkpath(*argv, mode, dir_mode) < 0)
121 exitval = EXIT_FAILURE;
122 } else {
123 if (mkdir(*argv, mode) < 0) {
124 warn("%s", *argv);
125 exitval = EXIT_FAILURE;
126 } else {
127 /*
128 * The mkdir() and umask() calls both honor
129 * only the file permission bits, so if you try
130 * to set a mode including the sticky, setuid,
131 * setgid bits you lose them. So chmod().
132 */
133 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) != 0 &&
134 chmod(*argv, mode) == -1) {
135 warn("%s", *argv);
136 exitval = EXIT_FAILURE;
137 }
138 }
139 }
140 }
141 exit(exitval);
142 /* NOTREACHED */
143 }
144
145 /*
146 * mkpath -- create directories.
147 * path - path
148 * mode - file mode of terminal directory
149 * dir_mode - file mode of intermediate directories
150 */
151 static int
mkpath(char * path,mode_t mode,mode_t dir_mode)152 mkpath(char *path, mode_t mode, mode_t dir_mode)
153 {
154 struct stat sb;
155 char *slash;
156 int done, rv;
157
158 done = 0;
159 slash = path;
160
161 for (;;) {
162 slash += strspn(slash, "/");
163 slash += strcspn(slash, "/");
164
165 done = (*(slash + strspn(slash, "/")) == '\0');
166 *slash = '\0';
167
168 rv = mkdir(path, done ? mode : dir_mode);
169 if (rv < 0) {
170 /*
171 * Can't create; path exists or no perms.
172 * stat() path to determine what's there now.
173 */
174 int sverrno;
175
176 sverrno = errno;
177 if (stat(path, &sb) < 0) {
178 /* Not there; use mkdir()s error */
179 errno = sverrno;
180 warn("%s", path);
181 return -1;
182 }
183 if (!S_ISDIR(sb.st_mode)) {
184 /* Is there, but isn't a directory */
185 errno = ENOTDIR;
186 warn("%s", path);
187 return -1;
188 }
189 } else if (done) {
190 /*
191 * Created ok, and this is the last element
192 */
193 /*
194 * The mkdir() and umask() calls both honor only the
195 * file permission bits, so if you try to set a mode
196 * including the sticky, setuid, setgid bits you lose
197 * them. So chmod().
198 */
199 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) != 0 &&
200 chmod(path, mode) == -1) {
201 warn("%s", path);
202 return -1;
203 }
204 }
205
206 if (done) {
207 break;
208 }
209 *slash = '/';
210 }
211
212 return 0;
213 }
214
215 static void
usage(void)216 usage(void)
217 {
218
219 (void)fprintf(stderr, "usage: %s [-p] [-m mode] dirname ...\n",
220 getprogname());
221 exit(EXIT_FAILURE);
222 /* NOTREACHED */
223 }
224