1 /* $OpenBSD: mkdir.c,v 1.31 2019/06/28 13:34:59 deraadt Exp $ */
2 /* $NetBSD: mkdir.c,v 1.14 1995/06/25 21:59:21 mycroft Exp $ */
3
4 /*
5 * Copyright (c) 1983, 1992, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/types.h>
34 #include <sys/stat.h>
35
36 #include <err.h>
37 #include <errno.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <unistd.h>
42
43 extern char *__progname;
44
45 int mkpath(char *, mode_t, mode_t);
46 static void __dead usage(void);
47
48 int
main(int argc,char * argv[])49 main(int argc, char *argv[])
50 {
51 int ch, rv, exitval, pflag;
52 void *set;
53 mode_t mode, dir_mode;
54
55 /*
56 * The default file mode is a=rwx (0777) with selected permissions
57 * removed in accordance with the file mode creation mask. For
58 * intermediate path name components, the mode is the default modified
59 * by u+wx so that the subdirectories can always be created.
60 */
61 mode = 0777 & ~umask(0);
62 dir_mode = mode | S_IWUSR | S_IXUSR;
63
64 pflag = 0;
65 while ((ch = getopt(argc, argv, "m:p")) != -1)
66 switch(ch) {
67 case 'p':
68 pflag = 1;
69 break;
70 case 'm':
71 if ((set = setmode(optarg)) == NULL)
72 errx(1, "invalid file mode: %s", optarg);
73 mode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
74 free(set);
75 break;
76 default:
77 usage();
78 }
79 argc -= optind;
80 argv += optind;
81
82 if ((mode & (S_ISUID | S_ISGID | S_ISTXT)) == 0) {
83 if (pledge("stdio rpath cpath fattr", NULL) == -1)
84 err(1, "pledge");
85 }
86
87 if (*argv == NULL)
88 usage();
89
90 for (exitval = 0; *argv != NULL; ++argv) {
91 char *slash;
92
93 /* Remove trailing slashes, per POSIX. */
94 slash = strrchr(*argv, '\0');
95 while (--slash > *argv && *slash == '/')
96 *slash = '\0';
97
98 if (pflag) {
99 rv = mkpath(*argv, mode, dir_mode);
100 } else {
101 rv = mkdir(*argv, mode);
102 /*
103 * The mkdir() and umask() calls both honor only the
104 * low nine bits, so if you try to set a mode including
105 * the sticky, setuid, setgid bits you lose them. Don't
106 * do this unless the user has specifically requested
107 * a mode as chmod will (obviously) ignore the umask.
108 */
109 if (rv == 0 && mode > 0777)
110 rv = chmod(*argv, mode);
111 }
112 if (rv == -1) {
113 warn("%s", *argv);
114 exitval = 1;
115 }
116 }
117 return exitval;
118 }
119
120 /*
121 * mkpath -- create directories.
122 * path - path
123 * mode - file mode of terminal directory
124 * dir_mode - file mode of intermediate directories
125 */
126 int
mkpath(char * path,mode_t mode,mode_t dir_mode)127 mkpath(char *path, mode_t mode, mode_t dir_mode)
128 {
129 struct stat sb;
130 char *slash;
131 int done;
132
133 slash = path;
134
135 for (;;) {
136 slash += strspn(slash, "/");
137 slash += strcspn(slash, "/");
138
139 done = (*slash == '\0');
140 *slash = '\0';
141
142 if (mkdir(path, done ? mode : dir_mode) == 0) {
143 if (mode > 0777 && chmod(path, mode) == -1)
144 return (-1);
145 } else {
146 int mkdir_errno = errno;
147
148 if (stat(path, &sb) == -1) {
149 /* Not there; use mkdir()s errno */
150 errno = mkdir_errno;
151 return (-1);
152 }
153 if (!S_ISDIR(sb.st_mode)) {
154 /* Is there, but isn't a directory */
155 errno = ENOTDIR;
156 return (-1);
157 }
158 }
159
160 if (done)
161 break;
162
163 *slash = '/';
164 }
165
166 return (0);
167 }
168
169 static void __dead
usage(void)170 usage(void)
171 {
172 (void)fprintf(stderr, "usage: %s [-p] [-m mode] directory ...\n",
173 __progname);
174 exit(1);
175 }
176