showmount.c revision 24360 
1/*
2 * Copyright (c) 1989, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
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 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static char copyright[] =
39"@(#) Copyright (c) 1989, 1993\n\
40	The Regents of the University of California.  All rights reserved.\n";
41#endif not lint
42
43#ifndef lint
44static char sccsid[] = "@(#)showmount.c	8.1 (Berkeley) 6/6/93";
45#endif not lint
46
47#include <sys/types.h>
48#include <sys/queue.h>
49#include <sys/file.h>
50#include <sys/socket.h>
51#include <sys/socketvar.h>
52#include <netdb.h>
53#include <rpc/rpc.h>
54#include <rpc/pmap_clnt.h>
55#include <rpc/pmap_prot.h>
56#include <nfs/rpcv2.h>
57#include <stdio.h>
58#include <string.h>
59
60/* Constant defs */
61#define	ALL	1
62#define	DIRS	2
63
64#define	DODUMP		0x1
65#define	DOEXPORTS	0x2
66
67struct mountlist {
68	struct mountlist *ml_left;
69	struct mountlist *ml_right;
70	char	ml_host[RPCMNT_NAMELEN+1];
71	char	ml_dirp[RPCMNT_PATHLEN+1];
72};
73
74struct grouplist {
75	struct grouplist *gr_next;
76	char	gr_name[RPCMNT_NAMELEN+1];
77};
78
79struct exportslist {
80	struct exportslist *ex_next;
81	struct grouplist *ex_groups;
82	char	ex_dirp[RPCMNT_PATHLEN+1];
83};
84
85static struct mountlist *mntdump;
86static struct exportslist *exports;
87static int type = 0;
88int xdr_mntdump(), xdr_exports();
89
90/*
91 * This command queries the NFS mount daemon for it's mount list and/or
92 * it's exports list and prints them out.
93 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A"
94 * and the "Network File System Protocol XXX.."
95 * for detailed information on the protocol.
96 */
97main(argc, argv)
98	int argc;
99	char **argv;
100{
101	register struct mountlist *mntp;
102	register struct exportslist *exp;
103	register struct grouplist *grp;
104	extern char *optarg;
105	extern int optind;
106	register int rpcs = 0, mntvers = 1;
107	char ch;
108	char *host;
109	int estat;
110
111	while ((ch = getopt(argc, argv, "ade3")) != -1)
112		switch((char)ch) {
113		case 'a':
114			if (type == 0) {
115				type = ALL;
116				rpcs |= DODUMP;
117			} else
118				usage();
119			break;
120		case 'd':
121			if (type == 0) {
122				type = DIRS;
123				rpcs |= DODUMP;
124			} else
125				usage();
126			break;
127		case 'e':
128			rpcs |= DOEXPORTS;
129			break;
130		case '3':
131			mntvers = 3;
132			break;
133		case '?':
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 (rpcs & DODUMP)
149		if ((estat = callrpc(host, RPCPROG_MNT, mntvers,
150			RPCMNT_DUMP, xdr_void, (char *)0,
151			xdr_mntdump, (char *)&mntdump)) != 0) {
152			clnt_perrno(estat);
153			fprintf(stderr, "Can't do Mountdump rpc\n");
154			exit(1);
155		}
156	if (rpcs & DOEXPORTS)
157		if ((estat = callrpc(host, RPCPROG_MNT, mntvers,
158			RPCMNT_EXPORT, xdr_void, (char *)0,
159			xdr_exports, (char *)&exports)) != 0) {
160			clnt_perrno(estat);
161			fprintf(stderr, "Can't do Exports rpc\n");
162			exit(1);
163		}
164
165	/* Now just print out the results */
166	if (rpcs & DODUMP) {
167		switch (type) {
168		case ALL:
169			printf("All mount points on %s:\n", host);
170			break;
171		case DIRS:
172			printf("Directories on %s:\n", host);
173			break;
174		default:
175			printf("Hosts on %s:\n", host);
176			break;
177		};
178		print_dump(mntdump);
179	}
180	if (rpcs & DOEXPORTS) {
181		printf("Exports list on %s:\n", host);
182		exp = exports;
183		while (exp) {
184			printf("%-35s", exp->ex_dirp);
185			grp = exp->ex_groups;
186			if (grp == NULL) {
187				printf("Everyone\n");
188			} else {
189				while (grp) {
190					printf("%s ", grp->gr_name);
191					grp = grp->gr_next;
192				}
193				printf("\n");
194			}
195			exp = exp->ex_next;
196		}
197	}
198}
199
200/*
201 * Xdr routine for retrieving the mount dump list
202 */
203xdr_mntdump(xdrsp, mlp)
204	XDR *xdrsp;
205	struct mountlist **mlp;
206{
207	register struct mountlist *mp;
208	register struct mountlist *tp;
209	register struct mountlist **otp;
210	int val, val2;
211	int bool;
212	char *strp;
213
214	*mlp = (struct mountlist *)0;
215	if (!xdr_bool(xdrsp, &bool))
216		return (0);
217	while (bool) {
218		mp = (struct mountlist *)malloc(sizeof(struct mountlist));
219		if (mp == NULL)
220			return (0);
221		mp->ml_left = mp->ml_right = (struct mountlist *)0;
222		strp = mp->ml_host;
223		if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
224			return (0);
225		strp = mp->ml_dirp;
226		if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
227			return (0);
228
229		/*
230		 * Build a binary tree on sorted order of either host or dirp.
231		 * Drop any duplications.
232		 */
233		if (*mlp == NULL) {
234			*mlp = mp;
235		} else {
236			tp = *mlp;
237			while (tp) {
238				val = strcmp(mp->ml_host, tp->ml_host);
239				val2 = strcmp(mp->ml_dirp, tp->ml_dirp);
240				switch (type) {
241				case ALL:
242					if (val == 0) {
243						if (val2 == 0) {
244							free((caddr_t)mp);
245							goto next;
246						}
247						val = val2;
248					}
249					break;
250				case DIRS:
251					if (val2 == 0) {
252						free((caddr_t)mp);
253						goto next;
254					}
255					val = val2;
256					break;
257				default:
258					if (val == 0) {
259						free((caddr_t)mp);
260						goto next;
261					}
262					break;
263				};
264				if (val < 0) {
265					otp = &tp->ml_left;
266					tp = tp->ml_left;
267				} else {
268					otp = &tp->ml_right;
269					tp = tp->ml_right;
270				}
271			}
272			*otp = mp;
273		}
274next:
275		if (!xdr_bool(xdrsp, &bool))
276			return (0);
277	}
278	return (1);
279}
280
281/*
282 * Xdr routine to retrieve exports list
283 */
284xdr_exports(xdrsp, exp)
285	XDR *xdrsp;
286	struct exportslist **exp;
287{
288	register struct exportslist *ep;
289	register struct grouplist *gp;
290	int bool, grpbool;
291	char *strp;
292
293	*exp = (struct exportslist *)0;
294	if (!xdr_bool(xdrsp, &bool))
295		return (0);
296	while (bool) {
297		ep = (struct exportslist *)malloc(sizeof(struct exportslist));
298		if (ep == NULL)
299			return (0);
300		ep->ex_groups = (struct grouplist *)0;
301		strp = ep->ex_dirp;
302		if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
303			return (0);
304		if (!xdr_bool(xdrsp, &grpbool))
305			return (0);
306		while (grpbool) {
307			gp = (struct grouplist *)malloc(sizeof(struct grouplist));
308			if (gp == NULL)
309				return (0);
310			strp = gp->gr_name;
311			if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
312				return (0);
313			gp->gr_next = ep->ex_groups;
314			ep->ex_groups = gp;
315			if (!xdr_bool(xdrsp, &grpbool))
316				return (0);
317		}
318		ep->ex_next = *exp;
319		*exp = ep;
320		if (!xdr_bool(xdrsp, &bool))
321			return (0);
322	}
323	return (1);
324}
325
326usage()
327{
328	fprintf(stderr, "usage: showmount [-ade] host\n");
329	exit(1);
330}
331
332/*
333 * Print the binary tree in inorder so that output is sorted.
334 */
335print_dump(mp)
336	struct mountlist *mp;
337{
338
339	if (mp == NULL)
340		return;
341	if (mp->ml_left)
342		print_dump(mp->ml_left);
343	switch (type) {
344	case ALL:
345		printf("%s:%s\n", mp->ml_host, mp->ml_dirp);
346		break;
347	case DIRS:
348		printf("%s\n", mp->ml_dirp);
349		break;
350	default:
351		printf("%s\n", mp->ml_host);
352		break;
353	};
354	if (mp->ml_right)
355		print_dump(mp->ml_right);
356}
357