DEVFS - Bring Alex's GSOC mount_devfs.
[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>
36//#include <vfs/devfs/devfs.h>
37
38#include <err.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <sysexits.h>
43#include <unistd.h>
44
45#include "mntopts.h"
46
47struct mntopt mopts[] = {
48 MOPT_STDOPTS,
49 MOPT_NULL
50};
51
52static void usage(void);
53
54int
55main(int argc, char **argv)
56{
57 //XXX: The type of args definitely should NOT be int, change whenever
58 // we need real arguments passed on to vfs_mount() in devfs
59 int args;
60 int ch, mntflags;
61 char mntpoint[MAXPATHLEN];
62 char target[MAXPATHLEN];
63 struct vfsconf vfc;
64 int error;
65
66 //XXX: Handle some real mountflags, e.g. UPDATE...
67 mntflags = 0;
68
69 //XXX: add support for some real options to mount_devfs
70 while ((ch = getopt(argc, argv, "o:")) != -1)
71 switch(ch) {
72 case 'o':
73 getmntopts(optarg, mopts, &mntflags, 0);
74 break;
75 case '?':
76 default:
77 usage();
78 }
79 argc -= optind;
80 argv += optind;
81
82 if (argc < 1)
83 usage();
84
85 /* resolve mount point with realpath(3) */
86 checkpath(argv[0], mntpoint);
87
88
89 error = getvfsbyname("devfs", &vfc);
90 if (error && vfsisloadable("devfs")) {
91 if(vfsload("devfs"))
92 err(EX_OSERR, "vfsload(devfs)");
93 endvfsent();
94 error = getvfsbyname("devfs", &vfc);
95 }
96 if (error)
97 errx(EX_OSERR, "devfs filesystem is not available");
98
99 //XXX: put something useful in args or get rid of it!
100 if (mount(vfc.vfc_name, mntpoint, mntflags, &args))
101 err(1, NULL);
102 exit(0);
103}
104
105static void
106usage(void)
107{
108 fprintf(stderr,
109 "usage: mount_devfs [-o options] mount_point\n");
110 exit(1);
111}