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