1 /*-
2  * Copyright (c) 2018 The NetBSD Foundation, Inc.
3  * All rights reserved.
4  *
5  * This code is derived from software contributed to The NetBSD Foundation
6  * by Christos Zoulas.
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  *
17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27  * POSSIBILITY OF SUCH DAMAGE.
28  */
29 
30 #include <sys/param.h>
31 #include <sys/mount.h>
32 #include <sys/cdefs.h>
33 
34 #include <err.h>
35 #include <mntopts.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39 #include <sysexits.h>
40 #include <unistd.h>
41 
42 #include <vfs/autofs/autofs_mount.h>
43 
44 #include "mount_autofs.h"
45 
46 static const struct mntopt mopts[] = {
47 	MOPT_STDOPTS,
48 	MOPT_NULL,
49 };
50 
51 static void	usage(void) __dead2;
52 
53 int
54 main(int argc, char **argv)
55 {
56 	return mount_autofs(argc, argv);
57 }
58 
59 void
60 mount_autofs_parseargs(int argc, char *argv[], void *v, int *mntflags,
61 	char *canon_dev, char *canon_dir)
62 {
63 	int ch;
64 	struct autofs_mount_info *am = v;
65 
66 	*mntflags = 0;
67 	while ((ch = getopt(argc, argv, "f:o:O:p:")) != -1)
68 		switch (ch) {
69 		case 'f':
70 			strlcpy(__DECONST(char*, am->from), optarg, MAXPATHLEN);
71 			break;
72 		case 'o':
73 			getmntopts(optarg, mopts, mntflags, 0);
74 			break;
75 		case 'O':
76 			strlcpy(__DECONST(char*, am->master_options), optarg,
77 			    MAXPATHLEN);
78 			break;
79 		case 'p':
80 			strlcpy(__DECONST(char*, am->master_prefix), optarg,
81 			    MAXPATHLEN);
82 			break;
83 		case '?':
84 		default:
85 			usage();
86 		}
87 	argc -= optind;
88 	argv += optind;
89 
90 	if (argc != 2)
91 		usage();
92 
93 	strlcpy(canon_dev, argv[0], MAXPATHLEN);
94 	if (realpath(argv[1], canon_dir) == NULL)    /* Check mounton path */
95 		err(EXIT_FAILURE, "realpath %s", canon_dir);
96 	if (strncmp(argv[1], canon_dir, MAXPATHLEN)) {
97 		warnx("\"%s\" is a relative path.", argv[1]);
98 		warnx("using \"%s\" instead.", canon_dir);
99 	}
100 }
101 
102 int
103 mount_autofs(int argc, char *argv[])
104 {
105 	char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN];
106 	char from[MAXPATHLEN], master_options[MAXPATHLEN];
107 	char master_prefix[MAXPATHLEN];
108 	int mntflags, error;
109 	struct vfsconf vfc;
110 	struct autofs_mount_info am = {
111 		.from = from,
112 		.master_options = master_options,
113 		.master_prefix = master_prefix,
114 	};
115 
116 	mount_autofs_parseargs(argc, argv, &am, &mntflags,
117 	    canon_dev, canon_dir);
118 
119 	error = getvfsbyname("autofs", &vfc);
120 	if (error && vfsisloadable("autofs")) {
121 		if(vfsload("autofs"))
122 			err(EX_OSERR, "vfsload(%s)", "autofs");
123 		endvfsent();
124 		error = getvfsbyname("autofs", &vfc);
125 	}
126 	if (error)
127 		errx(EX_OSERR, "%s filesystem not available", "autofs");
128 
129 	if (mount(vfc.vfc_name, canon_dir, mntflags, &am) == -1)
130 		err(EXIT_FAILURE, "autofs on %s", canon_dir);
131 
132 	return EXIT_SUCCESS;
133 }
134 
135 static void
136 usage(void)
137 {
138 	(void)fprintf(stderr,
139 	    "Usage: %s [-o options] [-O master_options] [-p master_prefix] "
140 		"[-f <from>] autofs mount_point\n", getprogname());
141 	exit(EXIT_FAILURE);
142 }
143