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
61static char mount_point[MAXPATHLEN + 1];
62static void usage(void);
63
64static struct mntopt mopts[] = {
65	MOPT_STDOPTS,
66	MOPT_END
67};
68
69static char smbfs_vfsname[] = "smbfs";
70
71int
72main(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
291static void
292usage(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