1/*
2 * Copyright (c) 1992, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software donated to Berkeley by
6 * Jan-Simon Pendry.
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 * 4. 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#ifndef lint
34static const char copyright[] =
35"@(#) Copyright (c) 1992, 1993, 1994\n\
36 The Regents of the University of California. All rights reserved.\n";
37#endif /* not lint */
38
39#ifndef lint
40#if 0
41static char sccsid[] = "@(#)mount_null.c 8.6 (Berkeley) 4/26/95";
42#endif
43static const char rcsid[] =
| 1/*
2 * Copyright (c) 1992, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software donated to Berkeley by
6 * Jan-Simon Pendry.
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 * 4. 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#ifndef lint
34static const char copyright[] =
35"@(#) Copyright (c) 1992, 1993, 1994\n\
36 The Regents of the University of California. All rights reserved.\n";
37#endif /* not lint */
38
39#ifndef lint
40#if 0
41static char sccsid[] = "@(#)mount_null.c 8.6 (Berkeley) 4/26/95";
42#endif
43static const char rcsid[] =
|
44 "$FreeBSD: head/sbin/mount_nullfs/mount_nullfs.c 152670 2005-11-21 22:51:16Z rodrigc $";
| 44 "$FreeBSD: head/sbin/mount_nullfs/mount_nullfs.c 201227 2009-12-29 22:53:27Z ed $";
|
45#endif /* not lint */
46
47#include <sys/param.h>
48#include <sys/mount.h>
49#include <sys/uio.h>
50
51#include <err.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55#include <sysexits.h>
56#include <unistd.h>
57
58#include "mntopts.h"
59
60struct mntopt mopts[] = {
61 MOPT_STDOPTS,
62 MOPT_END
63};
64
65int subdir(const char *, const char *);
66static void usage(void) __dead2;
67
68int
69main(int argc, char *argv[])
70{
71 struct iovec iov[6];
72 int ch, mntflags;
73 char source[MAXPATHLEN];
74 char target[MAXPATHLEN];
75
76 mntflags = 0;
77 while ((ch = getopt(argc, argv, "o:")) != -1)
78 switch(ch) {
79 case 'o':
80 getmntopts(optarg, mopts, &mntflags, 0);
81 break;
82 case '?':
83 default:
84 usage();
85 }
86 argc -= optind;
87 argv += optind;
88
89 if (argc != 2)
90 usage();
91
92 /* resolve target and source with realpath(3) */
93 (void)checkpath(argv[0], target);
94 (void)checkpath(argv[1], source);
95
96 if (subdir(target, source) || subdir(source, target))
97 errx(EX_USAGE, "%s (%s) and %s are not distinct paths",
98 argv[0], target, argv[1]);
99
100 iov[0].iov_base = strdup("fstype");
101 iov[0].iov_len = sizeof("fstype");
102 iov[1].iov_base = strdup("nullfs");
103 iov[1].iov_len = strlen(iov[1].iov_base) + 1;
104 iov[2].iov_base = strdup("fspath");
105 iov[2].iov_len = sizeof("fspath");
106 iov[3].iov_base = source;
107 iov[3].iov_len = strlen(source) + 1;
108 iov[4].iov_base = strdup("target");
109 iov[4].iov_len = sizeof("target");
110 iov[5].iov_base = target;
111 iov[5].iov_len = strlen(target) + 1;
112
113 if (nmount(iov, 6, mntflags))
114 err(1, NULL);
115 exit(0);
116}
117
118int
| 45#endif /* not lint */
46
47#include <sys/param.h>
48#include <sys/mount.h>
49#include <sys/uio.h>
50
51#include <err.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55#include <sysexits.h>
56#include <unistd.h>
57
58#include "mntopts.h"
59
60struct mntopt mopts[] = {
61 MOPT_STDOPTS,
62 MOPT_END
63};
64
65int subdir(const char *, const char *);
66static void usage(void) __dead2;
67
68int
69main(int argc, char *argv[])
70{
71 struct iovec iov[6];
72 int ch, mntflags;
73 char source[MAXPATHLEN];
74 char target[MAXPATHLEN];
75
76 mntflags = 0;
77 while ((ch = getopt(argc, argv, "o:")) != -1)
78 switch(ch) {
79 case 'o':
80 getmntopts(optarg, mopts, &mntflags, 0);
81 break;
82 case '?':
83 default:
84 usage();
85 }
86 argc -= optind;
87 argv += optind;
88
89 if (argc != 2)
90 usage();
91
92 /* resolve target and source with realpath(3) */
93 (void)checkpath(argv[0], target);
94 (void)checkpath(argv[1], source);
95
96 if (subdir(target, source) || subdir(source, target))
97 errx(EX_USAGE, "%s (%s) and %s are not distinct paths",
98 argv[0], target, argv[1]);
99
100 iov[0].iov_base = strdup("fstype");
101 iov[0].iov_len = sizeof("fstype");
102 iov[1].iov_base = strdup("nullfs");
103 iov[1].iov_len = strlen(iov[1].iov_base) + 1;
104 iov[2].iov_base = strdup("fspath");
105 iov[2].iov_len = sizeof("fspath");
106 iov[3].iov_base = source;
107 iov[3].iov_len = strlen(source) + 1;
108 iov[4].iov_base = strdup("target");
109 iov[4].iov_len = sizeof("target");
110 iov[5].iov_base = target;
111 iov[5].iov_len = strlen(target) + 1;
112
113 if (nmount(iov, 6, mntflags))
114 err(1, NULL);
115 exit(0);
116}
117
118int
|
119subdir(p, dir)
120 const char *p;
121 const char *dir;
| 119subdir(const char *p, const char *dir)
|
122{
123 int l;
124
125 l = strlen(dir);
126 if (l <= 1)
127 return (1);
128
129 if ((strncmp(p, dir, l) == 0) && (p[l] == '/' || p[l] == '\0'))
130 return (1);
131
132 return (0);
133}
134
135static void
| 120{
121 int l;
122
123 l = strlen(dir);
124 if (l <= 1)
125 return (1);
126
127 if ((strncmp(p, dir, l) == 0) && (p[l] == '/' || p[l] == '\0'))
128 return (1);
129
130 return (0);
131}
132
133static void
|
136usage()
| 134usage(void)
|
137{
138 (void)fprintf(stderr,
139 "usage: mount_nullfs [-o options] target mount-point\n");
140 exit(1);
141}
| 135{
136 (void)fprintf(stderr,
137 "usage: mount_nullfs [-o options] target mount-point\n");
138 exit(1);
139}
|