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 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38char copyright[] =
39"@(#) Copyright (c) 1992, 1993, 1994\n\
40 The Regents of the University of California. All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44static char sccsid[] = "@(#)mount_union.c 8.5 (Berkeley) 3/27/94";
45#endif /* not lint */
46
47#include <sys/param.h>
48#include <sys/mount.h>
49
50#include <miscfs/union/union.h>
51
52#include <err.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <string.h>
56#include <unistd.h>
57
58#include "mntopts.h"
59
60struct mntopt mopts[] = {
61 MOPT_STDOPTS,
62 { NULL }
63};
64
65int subdir __P((const char *, const char *));
66void usage __P((void));
67
68int
69main(argc, argv)
70 int argc;
71 char *argv[];
72{
73 struct union_args args;
74 int ch, mntflags;
75 char target[MAXPATHLEN];
76 struct vfsconf *vfc;
77
78 mntflags = 0;
79 args.mntflags = UNMNT_ABOVE;
80 while ((ch = getopt(argc, argv, "bo:r")) != EOF)
81 switch (ch) {
82 case 'b':
83 args.mntflags &= ~UNMNT_OPMASK;
84 args.mntflags |= UNMNT_BELOW;
85 break;
86 case 'o':
| 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 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38char copyright[] =
39"@(#) Copyright (c) 1992, 1993, 1994\n\
40 The Regents of the University of California. All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44static char sccsid[] = "@(#)mount_union.c 8.5 (Berkeley) 3/27/94";
45#endif /* not lint */
46
47#include <sys/param.h>
48#include <sys/mount.h>
49
50#include <miscfs/union/union.h>
51
52#include <err.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <string.h>
56#include <unistd.h>
57
58#include "mntopts.h"
59
60struct mntopt mopts[] = {
61 MOPT_STDOPTS,
62 { NULL }
63};
64
65int subdir __P((const char *, const char *));
66void usage __P((void));
67
68int
69main(argc, argv)
70 int argc;
71 char *argv[];
72{
73 struct union_args args;
74 int ch, mntflags;
75 char target[MAXPATHLEN];
76 struct vfsconf *vfc;
77
78 mntflags = 0;
79 args.mntflags = UNMNT_ABOVE;
80 while ((ch = getopt(argc, argv, "bo:r")) != EOF)
81 switch (ch) {
82 case 'b':
83 args.mntflags &= ~UNMNT_OPMASK;
84 args.mntflags |= UNMNT_BELOW;
85 break;
86 case 'o':
|
88 break;
89 case 'r':
90 args.mntflags &= ~UNMNT_OPMASK;
91 args.mntflags |= UNMNT_REPLACE;
92 break;
93 case '?':
94 default:
95 usage();
96 /* NOTREACHED */
97 }
98 argc -= optind;
99 argv += optind;
100
101 if (argc != 2)
102 usage();
103
104 if (realpath(argv[0], target) == 0)
105 err(1, "%s", target);
106
107 if (subdir(target, argv[1]) || subdir(argv[1], target))
108 errx(1, "%s (%s) and %s are not distinct paths",
109 argv[0], target, argv[1]);
110
111 args.target = target;
112
113 vfc = getvfsbyname("union");
114 if(!vfc && vfsisloadable("union")) {
115 if(vfsload("union"))
116 err(1, "vfsload(union)");
117 endvfsent(); /* flush cache */
118 vfc = getvfsbyname("union");
119 }
120
121 if (mount(vfc ? vfc->vfc_index : MOUNT_UNION, argv[1], mntflags, &args))
122 err(1, NULL);
123 exit(0);
124}
125
126int
127subdir(p, dir)
128 const char *p;
129 const char *dir;
130{
131 int l;
132
133 l = strlen(dir);
134 if (l <= 1)
135 return (1);
136
137 if ((strncmp(p, dir, l) == 0) && (p[l] == '/' || p[l] == '\0'))
138 return (1);
139
140 return (0);
141}
142
143void
144usage()
145{
146 (void)fprintf(stderr,
147 "usage: mount_union [-br] [-o options] target_fs mount_point\n");
148 exit(1);
149}
| 88 break;
89 case 'r':
90 args.mntflags &= ~UNMNT_OPMASK;
91 args.mntflags |= UNMNT_REPLACE;
92 break;
93 case '?':
94 default:
95 usage();
96 /* NOTREACHED */
97 }
98 argc -= optind;
99 argv += optind;
100
101 if (argc != 2)
102 usage();
103
104 if (realpath(argv[0], target) == 0)
105 err(1, "%s", target);
106
107 if (subdir(target, argv[1]) || subdir(argv[1], target))
108 errx(1, "%s (%s) and %s are not distinct paths",
109 argv[0], target, argv[1]);
110
111 args.target = target;
112
113 vfc = getvfsbyname("union");
114 if(!vfc && vfsisloadable("union")) {
115 if(vfsload("union"))
116 err(1, "vfsload(union)");
117 endvfsent(); /* flush cache */
118 vfc = getvfsbyname("union");
119 }
120
121 if (mount(vfc ? vfc->vfc_index : MOUNT_UNION, argv[1], mntflags, &args))
122 err(1, NULL);
123 exit(0);
124}
125
126int
127subdir(p, dir)
128 const char *p;
129 const char *dir;
130{
131 int l;
132
133 l = strlen(dir);
134 if (l <= 1)
135 return (1);
136
137 if ((strncmp(p, dir, l) == 0) && (p[l] == '/' || p[l] == '\0'))
138 return (1);
139
140 return (0);
141}
142
143void
144usage()
145{
146 (void)fprintf(stderr,
147 "usage: mount_union [-br] [-o options] target_fs mount_point\n");
148 exit(1);
149}
|