1/* $NetBSD: mount_ados.c,v 1.28 2008/08/05 20:57:45 pooka Exp $ */
2
3/*
4 * Copyright (c) 1994 Christopher G. Demetriou
5 * All rights reserved.
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 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *          This product includes software developed for the
18 *          NetBSD Project.  See http://www.NetBSD.org/ for
19 *          information about NetBSD.
20 * 4. The name of the author may not be used to endorse or promote products
21 *    derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 * <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
35 */
36
37#include <sys/cdefs.h>
38#ifndef lint
39__RCSID("$NetBSD: mount_ados.c,v 1.28 2008/08/05 20:57:45 pooka Exp $");
40#endif /* not lint */
41
42#include <sys/param.h>
43#include <sys/mount.h>
44#include <sys/stat.h>
45#include <assert.h>
46#include <err.h>
47#include <grp.h>
48#include <pwd.h>
49#include <stdio.h>
50#include <stdlib.h>
51#include <string.h>
52#include <unistd.h>
53
54#include <adosfs/adosfs.h>
55
56#include <mntopts.h>
57#include <errno.h>
58
59#include "mountprog.h"
60
61static const struct mntopt mopts[] = {
62	MOPT_STDOPTS,
63	MOPT_GETARGS,
64	MOPT_NULL,
65};
66
67int	mount_ados(int argc, char **argv);
68__dead static void	usage(void);
69
70#ifndef MOUNT_NOMAIN
71int
72main(int argc, char **argv)
73{
74	return mount_ados(argc, argv);
75}
76#endif
77
78int
79mount_ados(int argc, char **argv)
80{
81	struct adosfs_args args;
82	struct stat sb;
83	mntoptparse_t mp;
84	int c, mntflags, set_gid, set_uid, set_mask;
85	char *dev, *dir, canon_dir[MAXPATHLEN], canon_dev[MAXPATHLEN];
86
87	mntflags = set_gid = set_uid = set_mask = 0;
88	(void)memset(&args, '\0', sizeof(args));
89
90	while ((c = getopt(argc, argv, "u:g:m:o:")) != -1) {
91		switch (c) {
92		case 'u':
93			args.uid = a_uid(optarg);
94			set_uid = 1;
95			break;
96		case 'g':
97			args.gid = a_gid(optarg);
98			set_gid = 1;
99			break;
100		case 'm':
101			args.mask = a_mask(optarg);
102			set_mask = 1;
103			break;
104		case 'o':
105			mp = getmntopts(optarg, mopts, &mntflags, 0);
106			if (mp == NULL)
107				err(1, "getmntopts");
108			freemntopts(mp);
109			break;
110		case '?':
111		default:
112			usage();
113			break;
114		}
115	}
116
117	if (optind + 2 != argc)
118		usage();
119
120	dev = argv[optind];
121	dir = argv[optind + 1];
122
123	if (realpath(dev, canon_dev) == NULL)        /* Check device path */
124		err(1, "realpath %s", dev);
125	if (strncmp(dev, canon_dev, MAXPATHLEN)) {
126		warnx("\"%s\" is a relative path.", dev);
127		dev = canon_dev;
128		warnx("using \"%s\" instead.", dev);
129	}
130
131	if (realpath(dir, canon_dir) == NULL)        /* Check mounton path */
132		err(1, "realpath %s", dir);
133	if (strncmp(dir, canon_dir, MAXPATHLEN)) {
134		warnx("\"%s\" is a relative path.", dir);
135		dir = canon_dir;
136		warnx("using \"%s\" instead.", dir);
137	}
138
139	args.fspec = dev;
140	if (!set_gid || !set_uid || !set_mask) {
141		if (stat(dir, &sb) == -1)
142			err(1, "stat %s", dir);
143
144		if (!set_uid)
145			args.uid = sb.st_uid;
146		if (!set_gid)
147			args.gid = sb.st_gid;
148		if (!set_mask)
149			args.mask = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
150	}
151
152	if (mount(MOUNT_ADOSFS, dir, mntflags, &args, sizeof args) == -1)
153		if (errno != EROFS)
154			err(1, "%s on %s", dev, dir);
155
156	if (mntflags & MNT_GETARGS) {
157		assert(errno != EROFS);
158		printf("uid=%d, gid=%d, mask=0%o\n", args.uid, args.gid,
159		    args.mask);
160		exit(0);
161	}
162
163	mntflags |= MNT_RDONLY;
164	if (mount(MOUNT_ADOSFS, dir, mntflags, &args, sizeof args) == -1)
165		err(1, "%s on %s", dev, dir);
166
167	exit (0);
168}
169
170static void
171usage(void)
172{
173
174	fprintf(stderr, "usage: mount_ados [-o options] [-u user] [-g group] [-m mask] bdev dir\n");
175	exit(1);
176}
177