xref: /freebsd/bin/mkdir/mkdir.c (revision 42c159fe388a3765f69860c84183700af37aca8a)
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 <libgen.h>
54 #include <stdio.h>
55 #include <stdlib.h>
56 #include <string.h>
57 #include <sysexits.h>
58 #include <unistd.h>
59 
60 static int	build(char *, mode_t);
61 static void	usage(void);
62 
63 int vflag;
64 
65 int
66 main(int argc, char *argv[])
67 {
68 	int ch, exitval, success, pflag;
69 	mode_t omode, *set = (mode_t *)NULL;
70 	char *mode;
71 
72 	omode = pflag = 0;
73 	mode = NULL;
74 	while ((ch = getopt(argc, argv, "m:pv")) != -1)
75 		switch(ch) {
76 		case 'm':
77 			mode = optarg;
78 			break;
79 		case 'p':
80 			pflag = 1;
81 			break;
82 		case 'v':
83 			vflag = 1;
84 			break;
85 		case '?':
86 		default:
87 			usage();
88 		}
89 
90 	argc -= optind;
91 	argv += optind;
92 	if (argv[0] == NULL)
93 		usage();
94 
95 	if (mode == NULL) {
96 		omode = S_IRWXU | S_IRWXG | S_IRWXO;
97 	} else {
98 		if ((set = setmode(mode)) == NULL)
99 			errx(1, "invalid file mode: %s", mode);
100 		omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
101 		free(set);
102 	}
103 
104 	for (exitval = 0; *argv != NULL; ++argv) {
105 		success = 1;
106 		if (pflag) {
107 			if (build(*argv, omode))
108 				success = 0;
109 		} else if (mkdir(*argv, omode) < 0) {
110 			if (errno == ENOTDIR || errno == ENOENT)
111 				warn("%s", dirname(*argv));
112 			else
113 				warn("%s", *argv);
114 			success = 0;
115 		} else if (vflag)
116 			(void)printf("%s\n", *argv);
117 
118 		if (!success)
119 			exitval = 1;
120 		/*
121 		 * The mkdir() and umask() calls both honor only the low
122 		 * nine bits, so if you try to set a mode including the
123 		 * sticky, setuid, setgid bits you lose them.  Don't do
124 		 * this unless the user has specifically requested a mode,
125 		 * as chmod will (obviously) ignore the umask.
126 		 */
127 		if (success && mode != NULL && chmod(*argv, omode) == -1) {
128 			warn("%s", *argv);
129 			exitval = 1;
130 		}
131 	}
132 	exit(exitval);
133 }
134 
135 int
136 build(char *path, mode_t omode)
137 {
138 	struct stat sb;
139 	mode_t numask, oumask;
140 	int first, last, retval;
141 	char *p;
142 
143 	p = path;
144 	oumask = 0;
145 	retval = 0;
146 	if (p[0] == '/')		/* Skip leading '/'. */
147 		++p;
148 	for (first = 1, last = 0; !last ; ++p) {
149 		if (p[0] == '\0')
150 			last = 1;
151 		else if (p[0] != '/')
152 			continue;
153 		*p = '\0';
154 		if (p[1] == '\0')
155 			last = 1;
156 		if (first) {
157 			/*
158 			 * POSIX 1003.2:
159 			 * For each dir operand that does not name an existing
160 			 * directory, effects equivalent to those cased by the
161 			 * following command shall occcur:
162 			 *
163 			 * mkdir -p -m $(umask -S),u+wx $(dirname dir) &&
164 			 *    mkdir [-m mode] dir
165 			 *
166 			 * We change the user's umask and then restore it,
167 			 * instead of doing chmod's.
168 			 */
169 			oumask = umask(0);
170 			numask = oumask & ~(S_IWUSR | S_IXUSR);
171 			(void)umask(numask);
172 			first = 0;
173 		}
174 		if (last)
175 			(void)umask(oumask);
176 		if (mkdir(path, last ? omode : S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
177 			if (errno == EEXIST || errno == EISDIR) {
178 				if (stat(path, &sb) < 0) {
179 					warn("%s", path);
180 					retval = 1;
181 					break;
182 				} else if (!S_ISDIR(sb.st_mode)) {
183 					if (last)
184 						errno = EEXIST;
185 					else
186 						errno = ENOTDIR;
187 					warn("%s", path);
188 					retval = 1;
189 					break;
190 				}
191 			} else {
192 				warn("%s", path);
193 				retval = 1;
194 				break;
195 			}
196 		} else if (vflag)
197 			printf("%s\n", path);
198 		if (!last)
199 		    *p = '/';
200 	}
201 	if (!first && !last)
202 		(void)umask(oumask);
203 	return (retval);
204 }
205 
206 void
207 usage(void)
208 {
209 
210 	(void)fprintf(stderr, "usage: mkdir [-pv] [-m mode] directory ...\n");
211 	exit (EX_USAGE);
212 }
213