xref: /freebsd/bin/mkdir/mkdir.c (revision 7f3dea244c40159a41ab22da77a434d7c5b5e85a)
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
35 static 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
42 static char sccsid[] = "@(#)mkdir.c	8.2 (Berkeley) 1/25/94";
43 #endif
44 static const char rcsid[] =
45   "$FreeBSD$";
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 <stdio.h>
54 #include <stdlib.h>
55 #include <string.h>
56 #include <unistd.h>
57 
58 int	build __P((char *, mode_t));
59 void	usage __P((void));
60 
61 int
62 main(argc, argv)
63 	int argc;
64 	char *argv[];
65 {
66 	int ch, exitval, success, omode, pflag;
67 	mode_t *set = (mode_t *)NULL;
68 	char *mode;
69 
70 	omode = pflag = 0;
71 	mode = NULL;
72 	while ((ch = getopt(argc, argv, "m:p")) != -1)
73 		switch(ch) {
74 		case 'p':
75 			pflag = 1;
76 			break;
77 		case 'm':
78 			mode = optarg;
79 			break;
80 		case '?':
81 		default:
82 			usage();
83 		}
84 
85 	argc -= optind;
86 	argv += optind;
87 	if (argv[0] == NULL)
88 		usage();
89 
90 	if (mode == NULL) {
91 		omode = S_IRWXU | S_IRWXG | S_IRWXO;
92 	} else {
93 		if ((set = setmode(mode)) == NULL)
94 			errx(1, "invalid file mode: %s", mode);
95 		omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
96 		free(set);
97 	}
98 
99 	for (exitval = 0; *argv != NULL; ++argv) {
100 		success = 1;
101 		if (pflag) {
102 			if (build(*argv, omode))
103 				success = 0;
104 		} else if (mkdir(*argv, omode) < 0) {
105 			warn("%s", *argv);
106 			success = 0;
107 		}
108 		if (!success)
109 			exitval = 1;
110 		/*
111 		 * The mkdir() and umask() calls both honor only the low
112 		 * nine bits, so if you try to set a mode including the
113 		 * sticky, setuid, setgid bits you lose them.  Don't do
114 		 * this unless the user has specifically requested a mode,
115 		 * as chmod will (obviously) ignore the umask.
116 		 */
117 		if (success && mode != NULL && chmod(*argv, omode) == -1) {
118 			warn("%s", *argv);
119 			exitval = 1;
120 		}
121 	}
122 	exit(exitval);
123 }
124 
125 int
126 build(path, omode)
127 	char *path;
128 	mode_t omode;
129 {
130 	struct stat sb;
131 	mode_t numask, oumask;
132 	int first, last, retval;
133 	char *p;
134 
135 	p = path;
136 	oumask = 0;
137 	retval = 0;
138 	if (p[0] == '/')		/* Skip leading '/'. */
139 		++p;
140 	for (first = 1, last = 0; !last ; ++p) {
141 		if (p[0] == '\0')
142 			last = 1;
143 		else if (p[0] != '/')
144 			continue;
145 		*p = '\0';
146 		if (p[1] == '\0')
147 			last = 1;
148 		if (first) {
149 			/*
150 			 * POSIX 1003.2:
151 			 * For each dir operand that does not name an existing
152 			 * directory, effects equivalent to those cased by the
153 			 * following command shall occcur:
154 			 *
155 			 * mkdir -p -m $(umask -S),u+wx $(dirname dir) &&
156 			 *    mkdir [-m mode] dir
157 			 *
158 			 * We change the user's umask and then restore it,
159 			 * instead of doing chmod's.
160 			 */
161 			oumask = umask(0);
162 			numask = oumask & ~(S_IWUSR | S_IXUSR);
163 			(void)umask(numask);
164 			first = 0;
165 		}
166 		if (last)
167 			(void)umask(oumask);
168 		if (stat(path, &sb)) {
169 			if (errno != ENOENT ||
170 			    mkdir(path, last ? omode :
171 				  S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
172 				warn("%s", path);
173 				retval = 1;
174 				break;
175 			}
176 		}
177 		else if ((sb.st_mode & S_IFMT) != S_IFDIR) {
178 			if (last)
179 				errno = EEXIST;
180 			else
181 				errno = ENOTDIR;
182 			warn("%s", path);
183 			retval = 1;
184 			break;
185 		}
186 		if (!last)
187 		    *p = '/';
188 	}
189 	if (!first && !last)
190 		(void)umask(oumask);
191 	return (retval);
192 }
193 
194 void
195 usage()
196 {
197 	(void)fprintf(stderr, "usage: mkdir [-p] [-m mode] directory ...\n");
198 	exit (1);
199 }
200