1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
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 #if 0
33 #ifndef lint
34 static char const copyright[] =
35 "@(#) Copyright (c) 1983, 1992, 1993\n\
36 The Regents of the University of California. All rights reserved.\n";
37 #endif /* not lint */
38
39 #ifndef lint
40 static char sccsid[] = "@(#)mkdir.c 8.2 (Berkeley) 1/25/94";
41 #endif /* not lint */
42 #endif
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD: stable/12/bin/mkdir/mkdir.c 371043 2021-11-19 05:01:47Z imp $");
45
46 #include <sys/types.h>
47 #include <sys/stat.h>
48
49 #include <err.h>
50 #include <errno.h>
51 #include <libgen.h>
52 #include <stdio.h>
53 #include <stdlib.h>
54 #include <string.h>
55 #include <sysexits.h>
56 #include <unistd.h>
57
58 static int build(char *, mode_t);
59 static void usage(void);
60
61 static int vflag;
62
63 int
main(int argc,char * argv[])64 main(int argc, char *argv[])
65 {
66 int ch, exitval, success, pflag;
67 mode_t omode;
68 void *set = NULL;
69 char *mode;
70
71 omode = pflag = 0;
72 mode = NULL;
73 while ((ch = getopt(argc, argv, "m:pv")) != -1)
74 switch(ch) {
75 case 'm':
76 mode = optarg;
77 break;
78 case 'p':
79 pflag = 1;
80 break;
81 case 'v':
82 vflag = 1;
83 break;
84 case '?':
85 default:
86 usage();
87 }
88
89 argc -= optind;
90 argv += optind;
91 if (argv[0] == NULL)
92 usage();
93
94 if (mode == NULL) {
95 omode = S_IRWXU | S_IRWXG | S_IRWXO;
96 } else {
97 if ((set = setmode(mode)) == NULL)
98 errx(1, "invalid file mode: %s", mode);
99 omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
100 free(set);
101 }
102
103 for (exitval = 0; *argv != NULL; ++argv) {
104 if (pflag) {
105 success = build(*argv, omode);
106 } else if (mkdir(*argv, omode) < 0) {
107 if (errno == ENOTDIR || errno == ENOENT)
108 warn("%s", dirname(*argv));
109 else
110 warn("%s", *argv);
111 success = 0;
112 } else {
113 success = 1;
114 if (vflag)
115 (void)printf("%s\n", *argv);
116 }
117 if (!success)
118 exitval = 1;
119 /*
120 * The mkdir() and umask() calls both honor only the low
121 * nine bits, so if you try to set a mode including the
122 * sticky, setuid, setgid bits you lose them. Don't do
123 * this unless the user has specifically requested a mode,
124 * as chmod will (obviously) ignore the umask. Do this
125 * on newly created directories only.
126 */
127 if (success == 1 && mode != NULL && chmod(*argv, omode) == -1) {
128 warn("%s", *argv);
129 exitval = 1;
130 }
131 }
132 exit(exitval);
133 }
134
135
136 /*
137 * Returns 1 if a directory has been created,
138 * 2 if it already existed, and 0 on failure.
139 */
140 static int
build(char * path,mode_t omode)141 build(char *path, mode_t omode)
142 {
143 struct stat sb;
144 mode_t numask, oumask;
145 int first, last, retval;
146 char *p;
147
148 p = path;
149 oumask = 0;
150 retval = 1;
151 if (p[0] == '/') /* Skip leading '/'. */
152 ++p;
153 for (first = 1, last = 0; !last ; ++p) {
154 if (p[0] == '\0')
155 last = 1;
156 else if (p[0] != '/')
157 continue;
158 *p = '\0';
159 if (!last && p[1] == '\0')
160 last = 1;
161 if (first) {
162 /*
163 * POSIX 1003.2:
164 * For each dir operand that does not name an existing
165 * directory, effects equivalent to those caused by the
166 * following command shall occur:
167 *
168 * mkdir -p -m $(umask -S),u+wx $(dirname dir) &&
169 * mkdir [-m mode] dir
170 *
171 * We change the user's umask and then restore it,
172 * instead of doing chmod's.
173 */
174 oumask = umask(0);
175 numask = oumask & ~(S_IWUSR | S_IXUSR);
176 (void)umask(numask);
177 first = 0;
178 }
179 if (last)
180 (void)umask(oumask);
181 if (mkdir(path, last ? omode : S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
182 if (errno == EEXIST || errno == EISDIR) {
183 if (stat(path, &sb) < 0) {
184 warn("%s", path);
185 retval = 0;
186 break;
187 } else if (!S_ISDIR(sb.st_mode)) {
188 if (last)
189 errno = EEXIST;
190 else
191 errno = ENOTDIR;
192 warn("%s", path);
193 retval = 0;
194 break;
195 }
196 if (last)
197 retval = 2;
198 } else {
199 warn("%s", path);
200 retval = 0;
201 break;
202 }
203 } else if (vflag)
204 printf("%s\n", path);
205 if (!last)
206 *p = '/';
207 }
208 if (!first && !last)
209 (void)umask(oumask);
210 return (retval);
211 }
212
213 static void
usage(void)214 usage(void)
215 {
216
217 (void)fprintf(stderr,
218 "usage: mkdir [-pv] [-m mode] directory_name ...\n");
219 exit (EX_USAGE);
220 }
221