GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/showmount/showmount.c Lines: 0 178 0.0 %
Date: 2017-11-07 Branches: 0 102 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: showmount.c,v 1.21 2017/01/21 11:32:04 guenther Exp $	*/
2
/*	$NetBSD: showmount.c,v 1.7 1996/05/01 18:14:10 cgd Exp $	*/
3
4
/*
5
 * Copyright (c) 1989, 1993, 1995
6
 *	The Regents of the University of California.  All rights reserved.
7
 *
8
 * This code is derived from software contributed to Berkeley by
9
 * Rick Macklem at The University of Guelph.
10
 *
11
 * Redistribution and use in source and binary forms, with or without
12
 * modification, are permitted provided that the following conditions
13
 * are met:
14
 * 1. Redistributions of source code must retain the above copyright
15
 *    notice, this list of conditions and the following disclaimer.
16
 * 2. Redistributions in binary form must reproduce the above copyright
17
 *    notice, this list of conditions and the following disclaimer in the
18
 *    documentation and/or other materials provided with the distribution.
19
 * 3. Neither the name of the University nor the names of its contributors
20
 *    may be used to endorse or promote products derived from this software
21
 *    without specific prior written permission.
22
 *
23
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33
 * SUCH DAMAGE.
34
 */
35
36
#include <sys/types.h>
37
#include <sys/file.h>
38
#include <sys/socket.h>
39
#include <sys/socketvar.h>
40
41
#include <netdb.h>
42
#include <rpc/rpc.h>
43
#include <rpc/pmap_clnt.h>
44
#include <rpc/pmap_prot.h>
45
#include <nfs/rpcv2.h>
46
47
#include <stdio.h>
48
#include <stdlib.h>
49
#include <string.h>
50
#include <unistd.h>
51
#include <vis.h>
52
#include <err.h>
53
54
/* Constant defs */
55
#define	ALL	1
56
#define	DIRS	2
57
58
#define	DODUMP		0x1
59
#define	DOEXPORTS	0x2
60
61
struct mountlist {
62
	struct mountlist *ml_left;
63
	struct mountlist *ml_right;
64
	char	ml_host[RPCMNT_NAMELEN+1];
65
	char	ml_dirp[RPCMNT_PATHLEN+1];
66
};
67
68
struct grouplist {
69
	struct grouplist *gr_next;
70
	char	gr_name[RPCMNT_NAMELEN+1];
71
};
72
73
struct exportslist {
74
	struct exportslist *ex_next;
75
	struct grouplist *ex_groups;
76
	char	ex_dirp[RPCMNT_PATHLEN+1];
77
};
78
79
static struct mountlist *mntdump;
80
static struct exportslist *exports;
81
static int type = 0;
82
83
void	print_dump(struct mountlist *);
84
void	usage(void);
85
int	xdr_mntdump(XDR *, struct mountlist **);
86
int	xdr_exports(XDR *, struct exportslist **);
87
88
/*
89
 * This command queries the NFS mount daemon for it's mount list and/or
90
 * it's exports list and prints them out.
91
 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A"
92
 * and the "Network File System Protocol XXX.."
93
 * for detailed information on the protocol.
94
 */
95
int
96
main(int argc, char *argv[])
97
{
98
	struct exportslist *exp;
99
	struct grouplist *grp;
100
	struct sockaddr_in clnt_sin;
101
	struct hostent *hp;
102
	struct timeval timeout;
103
	int rpcs = 0, mntvers = 1;
104
	enum clnt_stat estat;
105
	CLIENT *client;
106
	char *host;
107
	int ch, clnt_sock;
108
109
	if (pledge("stdio rpath inet dns flock cpath wpath", NULL) == -1)
110
		err(1, "pledge");
111
112
	while ((ch = getopt(argc, argv, "ade3")) != -1)
113
		switch (ch) {
114
		case 'a':
115
			if (type == 0) {
116
				type = ALL;
117
				rpcs |= DODUMP;
118
			} else
119
				usage();
120
			break;
121
		case 'd':
122
			if (type == 0) {
123
				type = DIRS;
124
				rpcs |= DODUMP;
125
			} else
126
				usage();
127
			break;
128
		case 'e':
129
			rpcs |= DOEXPORTS;
130
			break;
131
		case '3':
132
			mntvers = 3;
133
			break;
134
		default:
135
			usage();
136
		}
137
	argc -= optind;
138
	argv += optind;
139
140
	if (argc > 0)
141
		host = *argv;
142
	else
143
		host = "localhost";
144
145
	if (rpcs == 0)
146
		rpcs = DODUMP;
147
148
	if ((hp = gethostbyname(host)) == NULL) {
149
		fprintf(stderr, "showmount: unknown host %s\n", host);
150
		exit(1);
151
	}
152
	bzero(&clnt_sin, sizeof clnt_sin);
153
	clnt_sin.sin_family = AF_INET;
154
	bcopy(hp->h_addr, (char *)&clnt_sin.sin_addr, hp->h_length);
155
	clnt_sock = RPC_ANYSOCK;
156
	client = clnttcp_create(&clnt_sin, RPCPROG_MNT, mntvers,
157
	    &clnt_sock, 0, 0);
158
	if (client == NULL) {
159
		clnt_pcreateerror("showmount: clnttcp_create");
160
		exit(1);
161
	}
162
	timeout.tv_sec = 30;
163
	timeout.tv_usec = 0;
164
165
	if (pledge("stdio rpath flock cpath wpath", NULL) == -1)
166
		err(1, "pledge");
167
168
	if (rpcs & DODUMP) {
169
		estat = clnt_call(client, RPCMNT_DUMP, xdr_void, NULL,
170
		    xdr_mntdump, (char *)&mntdump, timeout);
171
		if (estat != RPC_SUCCESS) {
172
			fprintf(stderr, "showmount: Can't do Mountdump rpc: ");
173
			clnt_perrno(estat);
174
			exit(1);
175
		}
176
	}
177
	if (rpcs & DOEXPORTS) {
178
		estat = clnt_call(client, RPCMNT_EXPORT, xdr_void, NULL,
179
		    xdr_exports, (char *)&exports, timeout);
180
		if (estat != RPC_SUCCESS) {
181
			fprintf(stderr, "showmount: Can't do Exports rpc: ");
182
			clnt_perrno(estat);
183
			exit(1);
184
		}
185
	}
186
187
	/* Now just print out the results */
188
	if (rpcs & DODUMP) {
189
		switch (type) {
190
		case ALL:
191
			printf("All mount points on %s:\n", host);
192
			break;
193
		case DIRS:
194
			printf("Directories on %s:\n", host);
195
			break;
196
		default:
197
			printf("Hosts on %s:\n", host);
198
			break;
199
		}
200
		print_dump(mntdump);
201
	}
202
	if (rpcs & DOEXPORTS) {
203
		char	vp[(RPCMNT_PATHLEN+1)*4];
204
		char	vn[(RPCMNT_NAMELEN+1)*4];
205
206
		printf("Exports list on %s:\n", host);
207
		exp = exports;
208
		while (exp) {
209
			strnvis(vp, exp->ex_dirp, sizeof vp, VIS_CSTYLE);
210
			printf("%-34s ", vp);
211
			grp = exp->ex_groups;
212
			if (grp == NULL) {
213
				printf("Everyone\n");
214
			} else {
215
				while (grp) {
216
					strnvis(vn, grp->gr_name, sizeof vn,
217
					    VIS_CSTYLE);
218
					printf("%s ", vn);
219
					grp = grp->gr_next;
220
				}
221
				printf("\n");
222
			}
223
			exp = exp->ex_next;
224
		}
225
	}
226
227
	exit(0);
228
}
229
230
/*
231
 * Xdr routine for retrieving the mount dump list
232
 */
233
int
234
xdr_mntdump(XDR *xdrsp, struct mountlist **mlp)
235
{
236
	struct mountlist *mp, **otp = NULL, *tp;
237
	int bool, val, val2;
238
	char *strp;
239
240
	*mlp = NULL;
241
	if (!xdr_bool(xdrsp, &bool))
242
		return (0);
243
	while (bool) {
244
		mp = malloc(sizeof(struct mountlist));
245
		if (mp == NULL)
246
			return (0);
247
		mp->ml_left = mp->ml_right = NULL;
248
		strp = mp->ml_host;
249
		if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
250
			return (0);
251
		strp = mp->ml_dirp;
252
		if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
253
			return (0);
254
255
		/*
256
		 * Build a binary tree on sorted order of either host or dirp.
257
		 * Drop any duplications.
258
		 */
259
		if (*mlp == NULL) {
260
			*mlp = mp;
261
		} else {
262
			tp = *mlp;
263
			while (tp) {
264
				val = strcmp(mp->ml_host, tp->ml_host);
265
				val2 = strcmp(mp->ml_dirp, tp->ml_dirp);
266
				switch (type) {
267
				case ALL:
268
					if (val == 0) {
269
						if (val2 == 0) {
270
							free((caddr_t)mp);
271
							goto next;
272
						}
273
						val = val2;
274
					}
275
					break;
276
				case DIRS:
277
					if (val2 == 0) {
278
						free((caddr_t)mp);
279
						goto next;
280
					}
281
					val = val2;
282
					break;
283
				default:
284
					if (val == 0) {
285
						free((caddr_t)mp);
286
						goto next;
287
					}
288
					break;
289
				}
290
				if (val < 0) {
291
					otp = &tp->ml_left;
292
					tp = tp->ml_left;
293
				} else {
294
					otp = &tp->ml_right;
295
					tp = tp->ml_right;
296
				}
297
			}
298
			*otp = mp;
299
		}
300
next:
301
		if (!xdr_bool(xdrsp, &bool))
302
			return (0);
303
	}
304
	return (1);
305
}
306
307
/*
308
 * Xdr routine to retrieve exports list
309
 */
310
int
311
xdr_exports(XDR *xdrsp, struct exportslist **exp)
312
{
313
	struct exportslist *ep;
314
	struct grouplist *gp;
315
	int bool, grpbool;
316
	char *strp;
317
318
	*exp = NULL;
319
	if (!xdr_bool(xdrsp, &bool))
320
		return (0);
321
	while (bool) {
322
		ep = malloc(sizeof(struct exportslist));
323
		if (ep == NULL)
324
			return (0);
325
		ep->ex_groups = NULL;
326
		strp = ep->ex_dirp;
327
		if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
328
			return (0);
329
		if (!xdr_bool(xdrsp, &grpbool))
330
			return (0);
331
		while (grpbool) {
332
			gp = malloc(sizeof(struct grouplist));
333
			if (gp == NULL)
334
				return (0);
335
			strp = gp->gr_name;
336
			if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
337
				return (0);
338
			gp->gr_next = ep->ex_groups;
339
			ep->ex_groups = gp;
340
			if (!xdr_bool(xdrsp, &grpbool))
341
				return (0);
342
		}
343
		ep->ex_next = *exp;
344
		*exp = ep;
345
		if (!xdr_bool(xdrsp, &bool))
346
			return (0);
347
	}
348
	return (1);
349
}
350
351
void
352
usage(void)
353
{
354
355
	fprintf(stderr, "usage: showmount [-3ade] [host]\n");
356
	exit(1);
357
}
358
359
/*
360
 * Print the binary tree in inorder so that output is sorted.
361
 */
362
void
363
print_dump(struct mountlist *mp)
364
{
365
	char	vn[(RPCMNT_NAMELEN+1)*4];
366
	char	vp[(RPCMNT_PATHLEN+1)*4];
367
368
	if (mp == NULL)
369
		return;
370
	if (mp->ml_left)
371
		print_dump(mp->ml_left);
372
	switch (type) {
373
	case ALL:
374
		strvis(vn, mp->ml_host, VIS_CSTYLE);
375
		strvis(vp, mp->ml_dirp, VIS_CSTYLE);
376
		printf("%s:%s\n", vn, vp);
377
		break;
378
	case DIRS:
379
		strvis(vp, mp->ml_dirp, VIS_CSTYLE);
380
		printf("%s\n", vp);
381
		break;
382
	default:
383
		strvis(vn, mp->ml_host, VIS_CSTYLE);
384
		printf("%s\n", vn);
385
		break;
386
	}
387
	if (mp->ml_right)
388
		print_dump(mp->ml_right);
389
}