mount_devfs - Complete functionality; integrate rule support
[dragonfly.git] / sbin / mount_devfs / mount_devfs.c
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1/*
2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Alex Hornung <ahornung@gmail.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
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
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34#include <sys/param.h>
35#include <sys/mount.h>
85819c59 36
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37#if 0
38#include <vfs/devfs/devfs.h>
39#endif
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40
41#include <err.h>
42#include <stdio.h>
43#include <stdlib.h>
44#include <string.h>
45#include <sysexits.h>
46#include <unistd.h>
47
48#include "mntopts.h"
49
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50#define DEVFS_MNT_RULESET 0x01
51#define DEVFS_MNT_JAIL 0x02
52#if 0
53#define MOPT_UPDATE { "update", 0, MNT_UPDATE, 0 }
54#endif
55#define MOPT_DEVFSOPTS \
56 { "ruleset=", 0, DEVFS_MNT_RULESET, 1 }, \
57 { "jail", 0, DEVFS_MNT_JAIL, 1 }
58
59
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60struct mntopt mopts[] = {
61 MOPT_STDOPTS,
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62 MOPT_DEVFSOPTS,
63#if 0
64 MOPT_UPDATE,
65#endif
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66 MOPT_NULL
67};
68
69static void usage(void);
70
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71struct devfs_mount_info {
72 int flags;
73};
74
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75int
76main(int argc, char **argv)
77{
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78 struct statfs sfb;
79 struct devfs_mount_info info;
710b4c75 80 int ch, mntflags;
85819c59 81 char *ptr;
710b4c75 82 char mntpoint[MAXPATHLEN];
85819c59 83 char rule_file[MAXPATHLEN];
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84 struct vfsconf vfc;
85 int error;
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86 info.flags = 0;
87 int i,k;
88 int mounted = 0;
710b4c75 89
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90 mntflags = 0;
91
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92 while ((ch = getopt(argc, argv, "o:")) != -1)
93 switch(ch) {
94 case 'o':
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95 getmntopts(optarg, mopts, &mntflags, &info.flags);
96 ptr = strstr(optarg, "ruleset=");
97 if (ptr) {
98 ptr += 8;
99 for (i = 0, k = 0;
100 (ptr[i] != '\0') && (ptr[i] != ',') && (i < MAXPATHLEN);
101 i++) {
102 rule_file[k++] = ptr[i];
103
104 }
105 rule_file[k] = '\0';
106 }
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107 break;
108 case '?':
109 default:
110 usage();
111 }
112 argc -= optind;
113 argv += optind;
114
115 if (argc < 1)
116 usage();
117
118 /* resolve mount point with realpath(3) */
119 checkpath(argv[0], mntpoint);
120
121
122 error = getvfsbyname("devfs", &vfc);
123 if (error && vfsisloadable("devfs")) {
124 if(vfsload("devfs"))
125 err(EX_OSERR, "vfsload(devfs)");
126 endvfsent();
127 error = getvfsbyname("devfs", &vfc);
128 }
129 if (error)
130 errx(EX_OSERR, "devfs filesystem is not available");
131
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132 error = statfs(mntpoint, &sfb);
133
134 if (error)
135 err(EX_OSERR, "could not statfs() the mount point");
136
137 if ((!strcmp(sfb.f_fstypename, "devfs")) &&
138 (!strcmp(sfb.f_mntfromname, "devfs"))) {
139 mounted = 1;
140 }
141
142 if (!mounted) {
143 if (mount(vfc.vfc_name, mntpoint, mntflags, &info))
144 err(1, NULL);
145 }
146
147 if (fork() == 0) {
148 execlp("devfsctl", "devfsctl",
149 "-m", mntpoint,
150 "-c",
151 "-r",
152 NULL);
153 }
154
155 if (info.flags & DEVFS_MNT_RULESET) {
156 if (fork() == 0) {
157 execlp("devfsctl", "devfsctl",
158 "-m", mntpoint,
159 "-a",
160 "-f", rule_file,
161 NULL);
162 }
163 }
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164 exit(0);
165}
166
167static void
168usage(void)
169{
170 fprintf(stderr,
171 "usage: mount_devfs [-o options] mount_point\n");
172 exit(1);
173}