Pre-2.0 release, synchronize with HAMMER 61G
[dragonfly.git] / usr.bin / showmount / showmount.c
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1 /*
2 * Copyright (c) 1989, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
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.
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.
36 * @(#) Copyright (c) 1989, 1993, 1995 The Regents of the University of California. All rights reserved.
37 * @(#)showmount.c 8.3 (Berkeley) 3/29/95
38 * $FreeBSD: src/usr.bin/showmount/showmount.c,v 1.8 1999/08/28 01:05:43 peter Exp $
39 * $DragonFly: src/usr.bin/showmount/showmount.c,v 1.5 2005/09/05 04:22:07 swildner Exp $
42 #include <sys/types.h>
43 #include <sys/queue.h>
44 #include <sys/file.h>
45 #include <sys/socket.h>
46 #include <sys/socketvar.h>
48 #include <err.h>
49 #include <netdb.h>
50 #include <rpc/rpc.h>
51 #include <rpc/pmap_clnt.h>
52 #include <rpc/pmap_prot.h>
53 #include <nfs/rpcv2.h>
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <string.h>
58 #include <unistd.h>
60 /* Constant defs */
61 #define ALL 1
62 #define DIRS 2
64 #define DODUMP 0x1
65 #define DOEXPORTS 0x2
67 struct 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];
74 struct grouplist {
75 struct grouplist *gr_next;
76 char gr_name[RPCMNT_NAMELEN+1];
79 struct exportslist {
80 struct exportslist *ex_next;
81 struct grouplist *ex_groups;
82 char ex_dirp[RPCMNT_PATHLEN+1];
85 static struct mountlist *mntdump;
86 static struct exportslist *exports;
87 static int type = 0;
89 void print_dump(struct mountlist *);
90 static void usage(void);
91 int xdr_mntdump(XDR *, struct mountlist **);
92 int xdr_exports(XDR *, struct exportslist **);
93 int tcp_callrpc(const char *host,
94 int prognum, int versnum, int procnum,
95 xdrproc_t inproc, char *in,
96 xdrproc_t outproc, char *out);
99 * This command queries the NFS mount daemon for it's mount list and/or
100 * it's exports list and prints them out.
101 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A"
102 * and the "Network File System Protocol XXX.."
103 * for detailed information on the protocol.
106 main(int argc, char **argv)
108 struct exportslist *exp;
109 struct grouplist *grp;
110 int rpcs = 0, mntvers = 1;
111 char ch;
112 const char *host;
113 int estat;
115 while ((ch = getopt(argc, argv, "ade3")) != -1)
116 switch((char)ch) {
117 case 'a':
118 if (type == 0) {
119 type = ALL;
120 rpcs |= DODUMP;
121 } else
122 usage();
123 break;
124 case 'd':
125 if (type == 0) {
126 type = DIRS;
127 rpcs |= DODUMP;
128 } else
129 usage();
130 break;
131 case 'e':
132 rpcs |= DOEXPORTS;
133 break;
134 case '3':
135 mntvers = 3;
136 break;
137 case '?':
138 default:
139 usage();
141 argc -= optind;
142 argv += optind;
144 if (argc > 0)
145 host = *argv;
146 else
147 host = "localhost";
149 if (rpcs == 0)
150 rpcs = DODUMP;
152 if (rpcs & DODUMP)
153 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers,
154 RPCMNT_DUMP, xdr_void, (char *)0,
155 xdr_mntdump, (char *)&mntdump)) != 0) {
156 clnt_perrno(estat);
157 errx(1, "can't do mountdump rpc");
159 if (rpcs & DOEXPORTS)
160 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers,
161 RPCMNT_EXPORT, xdr_void, (char *)0,
162 xdr_exports, (char *)&exports)) != 0) {
163 clnt_perrno(estat);
164 errx(1, "can't do exports rpc");
167 /* Now just print out the results */
168 if (rpcs & DODUMP) {
169 switch (type) {
170 case ALL:
171 printf("All mount points on %s:\n", host);
172 break;
173 case DIRS:
174 printf("Directories on %s:\n", host);
175 break;
176 default:
177 printf("Hosts on %s:\n", host);
178 break;
180 print_dump(mntdump);
182 if (rpcs & DOEXPORTS) {
183 printf("Exports list on %s:\n", host);
184 exp = exports;
185 while (exp) {
186 printf("%-35s", exp->ex_dirp);
187 grp = exp->ex_groups;
188 if (grp == NULL) {
189 printf("Everyone\n");
190 } else {
191 while (grp) {
192 printf("%s ", grp->gr_name);
193 grp = grp->gr_next;
195 printf("\n");
197 exp = exp->ex_next;
200 exit(0);
204 * tcp_callrpc has the same interface as callrpc, but tries to
205 * use tcp as transport method in order to handle large replies.
208 int
209 tcp_callrpc(const char *host, int prognum, int versnum, int procnum,
210 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out)
212 struct hostent *hp;
213 struct sockaddr_in server_addr;
214 CLIENT *client;
215 int sock;
216 struct timeval timeout;
217 int rval;
219 hp = gethostbyname(host);
221 if (!hp)
222 return ((int) RPC_UNKNOWNHOST);
224 memset(&server_addr,0,sizeof(server_addr));
225 memcpy((char *) &server_addr.sin_addr,
226 hp->h_addr,
227 hp->h_length);
228 server_addr.sin_len = sizeof(struct sockaddr_in);
229 server_addr.sin_family =AF_INET;
230 server_addr.sin_port = 0;
232 sock = RPC_ANYSOCK;
234 client = clnttcp_create(&server_addr,
235 (u_long) prognum,
236 (u_long) versnum, &sock, 0, 0);
237 if (!client) {
238 timeout.tv_sec = 5;
239 timeout.tv_usec = 0;
240 server_addr.sin_port = 0;
241 sock = RPC_ANYSOCK;
242 client = clntudp_create(&server_addr,
243 (u_long) prognum,
244 (u_long) versnum,
245 timeout,
246 &sock);
248 if (!client)
249 return ((int) rpc_createerr.cf_stat);
251 timeout.tv_sec = 25;
252 timeout.tv_usec = 0;
253 rval = (int) clnt_call(client, procnum,
254 inproc, in,
255 outproc, out,
256 timeout);
257 clnt_destroy(client);
258 return rval;
262 * Xdr routine for retrieving the mount dump list
265 xdr_mntdump(XDR *xdrsp, struct mountlist **mlp)
267 struct mountlist *mp;
268 struct mountlist *tp;
269 struct mountlist **otp = NULL;
270 int val, val2;
271 int bool;
272 char *strp;
274 *mlp = (struct mountlist *)0;
275 if (!xdr_bool(xdrsp, &bool))
276 return (0);
277 while (bool) {
278 mp = (struct mountlist *)malloc(sizeof(struct mountlist));
279 if (mp == NULL)
280 return (0);
281 mp->ml_left = mp->ml_right = (struct mountlist *)0;
282 strp = mp->ml_host;
283 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
284 return (0);
285 strp = mp->ml_dirp;
286 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
287 return (0);
290 * Build a binary tree on sorted order of either host or dirp.
291 * Drop any duplications.
293 if (*mlp == NULL) {
294 *mlp = mp;
295 } else {
296 tp = *mlp;
297 while (tp) {
298 val = strcmp(mp->ml_host, tp->ml_host);
299 val2 = strcmp(mp->ml_dirp, tp->ml_dirp);
300 switch (type) {
301 case ALL:
302 if (val == 0) {
303 if (val2 == 0) {
304 free(mp);
305 goto next;
307 val = val2;
309 break;
310 case DIRS:
311 if (val2 == 0) {
312 free(mp);
313 goto next;
315 val = val2;
316 break;
317 default:
318 if (val == 0) {
319 free(mp);
320 goto next;
322 break;
324 if (val < 0) {
325 otp = &tp->ml_left;
326 tp = tp->ml_left;
327 } else {
328 otp = &tp->ml_right;
329 tp = tp->ml_right;
332 *otp = mp;
334 next:
335 if (!xdr_bool(xdrsp, &bool))
336 return (0);
338 return (1);
342 * Xdr routine to retrieve exports list
345 xdr_exports(XDR *xdrsp, struct exportslist **exp)
347 struct exportslist *ep;
348 struct grouplist *gp;
349 int bool, grpbool;
350 char *strp;
352 *exp = (struct exportslist *)0;
353 if (!xdr_bool(xdrsp, &bool))
354 return (0);
355 while (bool) {
356 ep = (struct exportslist *)malloc(sizeof(struct exportslist));
357 if (ep == NULL)
358 return (0);
359 ep->ex_groups = (struct grouplist *)0;
360 strp = ep->ex_dirp;
361 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
362 return (0);
363 if (!xdr_bool(xdrsp, &grpbool))
364 return (0);
365 while (grpbool) {
366 gp = (struct grouplist *)malloc(sizeof(struct grouplist));
367 if (gp == NULL)
368 return (0);
369 strp = gp->gr_name;
370 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
371 return (0);
372 gp->gr_next = ep->ex_groups;
373 ep->ex_groups = gp;
374 if (!xdr_bool(xdrsp, &grpbool))
375 return (0);
377 ep->ex_next = *exp;
378 *exp = ep;
379 if (!xdr_bool(xdrsp, &bool))
380 return (0);
382 return (1);
385 static void
386 usage(void)
388 fprintf(stderr, "usage: showmount [-ade3] host\n");
389 exit(1);
393 * Print the binary tree in inorder so that output is sorted.
395 void
396 print_dump(struct mountlist *mp)
398 if (mp == NULL)
399 return;
400 if (mp->ml_left)
401 print_dump(mp->ml_left);
402 switch (type) {
403 case ALL:
404 printf("%s:%s\n", mp->ml_host, mp->ml_dirp);
405 break;
406 case DIRS:
407 printf("%s\n", mp->ml_dirp);
408 break;
409 default:
410 printf("%s\n", mp->ml_host);
411 break;
413 if (mp->ml_right)
414 print_dump(mp->ml_right);