xref: /freebsd/contrib/smbfs/mount_smbfs/mount_smbfs.c (revision 39beb93c3f8bdbf72a61fda42300b5ebed7390c8)
1 /*
2  * Copyright (c) 2000-2002, Boris Popov
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *    This product includes software developed by Boris Popov.
16  * 4. Neither the name of the author nor the names of any co-contributors
17  *    may be used to endorse or promote products derived from this software
18  *    without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  *
32  * $Id: mount_smbfs.c,v 1.17 2002/04/10 04:17:51 bp Exp $
33  * $FreeBSD$
34  */
35 #include <sys/param.h>
36 #include <sys/stat.h>
37 #include <sys/errno.h>
38 #include <sys/linker.h>
39 #include <sys/mount.h>
40 
41 #include <stdio.h>
42 #include <string.h>
43 #include <pwd.h>
44 #include <grp.h>
45 #include <unistd.h>
46 #include <ctype.h>
47 #include <stdlib.h>
48 #include <err.h>
49 #include <sysexits.h>
50 
51 #include <cflib.h>
52 
53 #include <netsmb/smb.h>
54 #include <netsmb/smb_conn.h>
55 #include <netsmb/smb_lib.h>
56 
57 #include <fs/smbfs/smbfs.h>
58 
59 #include "mntopts.h"
60 
61 static char mount_point[MAXPATHLEN + 1];
62 static void usage(void);
63 
64 static struct mntopt mopts[] = {
65 	MOPT_STDOPTS,
66 	MOPT_END
67 };
68 
69 static char smbfs_vfsname[] = "smbfs";
70 
71 int
72 main(int argc, char *argv[])
73 {
74 	struct iovec *iov;
75 	unsigned int iovlen;
76 	struct smb_ctx sctx, *ctx = &sctx;
77 	struct stat st;
78 #ifdef APPLE
79 	extern void dropsuid();
80 	extern int loadsmbvfs();
81 #else
82 	struct xvfsconf vfc;
83 #endif
84 	char *next;
85 	int opt, error, mntflags, caseopt, dev;
86 	uid_t uid;
87 	gid_t gid;
88 	mode_t dir_mode, file_mode;
89 	char errmsg[255] = { 0 };
90 
91 	iov = NULL;
92 	iovlen = 0;
93 	dev = 0;
94 	uid = (uid_t)-1;
95 	gid = (gid_t)-1;
96 	caseopt = 0;
97 	file_mode = 0;
98 	dir_mode = 0;
99 
100 #ifdef APPLE
101 	dropsuid();
102 #endif
103 	if (argc == 2) {
104 		if (strcmp(argv[1], "-h") == 0) {
105 			usage();
106 		}
107 	}
108 	if (argc < 3)
109 		usage();
110 
111 #ifdef APPLE
112 	error = loadsmbvfs();
113 #else
114 	error = getvfsbyname(smbfs_vfsname, &vfc);
115 	if (error) {
116 		if (kldload(smbfs_vfsname) < 0)
117 			err(EX_OSERR, "kldload(%s)", smbfs_vfsname);
118 		error = getvfsbyname(smbfs_vfsname, &vfc);
119 	}
120 #endif
121 	if (error)
122 		errx(EX_OSERR, "SMB filesystem is not available");
123 
124 	if (smb_lib_init() != 0)
125 		exit(1);
126 
127 	mntflags = error = 0;
128 
129 	caseopt = SMB_CS_NONE;
130 
131 	if (smb_ctx_init(ctx, argc, argv, SMBL_SHARE, SMBL_SHARE, SMB_ST_DISK) != 0)
132 		exit(1);
133 	if (smb_ctx_readrc(ctx) != 0)
134 		exit(1);
135 	if (smb_rc)
136 		rc_close(smb_rc);
137 
138 	while ((opt = getopt(argc, argv, STDPARAM_OPT"c:d:f:g:l:n:o:u:w:")) != -1) {
139 		switch (opt) {
140 		    case STDPARAM_ARGS:
141 			error = smb_ctx_opt(ctx, opt, optarg);
142 			if (error)
143 				exit(1);
144 			break;
145 		    case 'u': {
146 			struct passwd *pwd;
147 
148 			pwd = isdigit(optarg[0]) ?
149 			    getpwuid(atoi(optarg)) : getpwnam(optarg);
150 			if (pwd == NULL)
151 				errx(EX_NOUSER, "unknown user '%s'", optarg);
152 			uid = pwd->pw_uid;
153 			break;
154 		    }
155 		    case 'g': {
156 			struct group *grp;
157 
158 			grp = isdigit(optarg[0]) ?
159 			    getgrgid(atoi(optarg)) : getgrnam(optarg);
160 			if (grp == NULL)
161 				errx(EX_NOUSER, "unknown group '%s'", optarg);
162 			gid = grp->gr_gid;
163 			break;
164 		    }
165 		    case 'd':
166 			errno = 0;
167 			dir_mode = strtol(optarg, &next, 8);
168 			if (errno || *next != 0)
169 				errx(EX_DATAERR, "invalid value for directory mode");
170 			break;
171 		    case 'f':
172 			errno = 0;
173 			file_mode = strtol(optarg, &next, 8);
174 			if (errno || *next != 0)
175 				errx(EX_DATAERR, "invalid value for file mode");
176 			break;
177 		    case '?':
178 			usage();
179 			/*NOTREACHED*/
180 		    case 'n': {
181 			char *inp, *nsp;
182 
183 			nsp = inp = optarg;
184 			while ((nsp = strsep(&inp, ",;:")) != NULL) {
185 				if (strcasecmp(nsp, "LONG") == 0) {
186 					build_iovec(&iov, &iovlen,
187 					    "nolong", NULL, 0);
188 				} else {
189 					errx(EX_DATAERR,
190 					    "unknown suboption '%s'", nsp);
191 				}
192 			}
193 			break;
194 		    };
195 		    case 'o':
196 			getmntopts(optarg, mopts, &mntflags, 0);
197 			break;
198 		    case 'c':
199 			switch (optarg[0]) {
200 			    case 'l':
201 				caseopt |= SMB_CS_LOWER;
202 				break;
203 			    case 'u':
204 				caseopt |= SMB_CS_UPPER;
205 				break;
206 			    default:
207 		    		errx(EX_DATAERR, "invalid suboption '%c' for -c",
208 				    optarg[0]);
209 			}
210 			break;
211 		    default:
212 			usage();
213 		}
214 	}
215 
216 	if (optind == argc - 2)
217 		optind++;
218 
219 	if (optind != argc - 1)
220 		usage();
221 	realpath(argv[optind], mount_point);
222 
223 	if (stat(mount_point, &st) == -1)
224 		err(EX_OSERR, "could not find mount point %s", mount_point);
225 	if (!S_ISDIR(st.st_mode)) {
226 		errno = ENOTDIR;
227 		err(EX_OSERR, "can't mount on %s", mount_point);
228 	}
229 /*
230 	if (smb_getextattr(mount_point, &einfo) == 0)
231 		errx(EX_OSERR, "can't mount on %s twice", mount_point);
232 */
233 	if (uid == (uid_t)-1)
234 		uid = st.st_uid;
235 	if (gid == (gid_t)-1)
236 		gid = st.st_gid;
237 	if (file_mode == 0 )
238 		file_mode = st.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
239 	if (dir_mode == 0) {
240 		dir_mode = file_mode;
241 		if (dir_mode & S_IRUSR)
242 			dir_mode |= S_IXUSR;
243 		if (dir_mode & S_IRGRP)
244 			dir_mode |= S_IXGRP;
245 		if (dir_mode & S_IROTH)
246 			dir_mode |= S_IXOTH;
247 	}
248 	/*
249 	 * For now, let connection be private for this mount
250 	 */
251 	ctx->ct_ssn.ioc_opt |= SMBVOPT_PRIVATE;
252 	ctx->ct_ssn.ioc_owner = ctx->ct_sh.ioc_owner = 0; /* root */
253 	ctx->ct_ssn.ioc_group = ctx->ct_sh.ioc_group = gid;
254 	opt = 0;
255 	if (dir_mode & S_IXGRP)
256 		opt |= SMBM_EXECGRP;
257 	if (dir_mode & S_IXOTH)
258 		opt |= SMBM_EXECOTH;
259 	ctx->ct_ssn.ioc_rights |= opt;
260 	ctx->ct_sh.ioc_rights |= opt;
261 	error = smb_ctx_resolve(ctx);
262 	if (error)
263 		exit(1);
264 	error = smb_ctx_lookup(ctx, SMBL_SHARE, SMBLK_CREATE);
265 	if (error) {
266 		exit(1);
267 	}
268 
269 	dev = ctx->ct_fd;
270 
271 	build_iovec(&iov, &iovlen, "fstype", strdup("smbfs"), -1);
272 	build_iovec(&iov, &iovlen, "fspath", mount_point, -1);
273 	build_iovec_argf(&iov, &iovlen, "dev", "%d", dev);
274 	build_iovec(&iov, &iovlen, "mountpoint", mount_point, -1);
275 	build_iovec_argf(&iov, &iovlen, "uid", "%d", uid);
276 	build_iovec_argf(&iov, &iovlen, "gid", "%d", gid);
277 	build_iovec_argf(&iov, &iovlen, "file_mode", "%d", file_mode);
278 	build_iovec_argf(&iov, &iovlen, "dir_mode", "%d", dir_mode);
279 	build_iovec_argf(&iov, &iovlen, "caseopt", "%d", caseopt);
280 	build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof errmsg);
281 
282 	error = nmount(iov, iovlen, mntflags);
283 	smb_ctx_done(ctx);
284 	if (error) {
285 		smb_error("mount error: %s %s", error, mount_point, errmsg);
286 		exit(1);
287 	}
288 	return 0;
289 }
290 
291 static void
292 usage(void)
293 {
294 	fprintf(stderr, "%s\n%s\n%s\n%s\n",
295 	"usage: mount_smbfs [-E cs1:cs2] [-I host] [-L locale] [-M crights:srights]",
296 	"                   [-N] [-O cowner:cgroup/sowner:sgroup] [-R retrycount]",
297 	"                   [-T timeout] [-W workgroup] [-c case] [-d mode] [-f mode]",
298 	"                   [-g gid] [-n opt] [-u uid] [-U username] //user@server/share node");
299 
300 	exit (1);
301 }
302