1 /*
2 * Copyright (c) 1989, 1993, 1995
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 * 4. Neither the name of the University nor the names of its 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 REGENTS 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 REGENTS 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
33 #ifndef lint
34 static const char copyright[] =
35 "@(#) Copyright (c) 1989, 1993, 1995\n\
36 The Regents of the University of California. All rights reserved.\n";
37 #endif /* not lint */
38
39 #ifndef lint
40 #if 0
41 static char sccsid[] = "@(#)showmount.c 8.3 (Berkeley) 3/29/95";
42 #endif
43 static const char rcsid[] =
44 "$FreeBSD$";
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
53 #include <err.h>
54 #include <netdb.h>
55 #include <rpc/rpc.h>
56 #include <rpc/pmap_clnt.h>
57 #include <rpc/pmap_prot.h>
58 #include <rpcsvc/mount.h>
59
60 #include <stdio.h>
61 #include <stdlib.h>
62 #include <string.h>
63 #include <unistd.h>
64
65 /* Constant defs */
66 #define ALL 1
67 #define DIRS 2
68
69 #define DODUMP 0x1
70 #define DOEXPORTS 0x2
71
72 struct mountlist {
73 struct mountlist *ml_left;
74 struct mountlist *ml_right;
75 char ml_host[MNTNAMLEN+1];
76 char ml_dirp[MNTPATHLEN+1];
77 };
78
79 struct grouplist {
80 struct grouplist *gr_next;
81 char gr_name[MNTNAMLEN+1];
82 };
83
84 struct exportslist {
85 struct exportslist *ex_next;
86 struct grouplist *ex_groups;
87 char ex_dirp[MNTPATHLEN+1];
88 };
89
90 static struct mountlist *mntdump;
91 static struct exportslist *exportslist;
92 static int type = 0;
93
94 void print_dump(struct mountlist *);
95 static void usage(void);
96 int xdr_mntdump(XDR *, struct mountlist **);
97 int xdr_exportslist(XDR *, struct exportslist **);
98 int tcp_callrpc(const char *host, int prognum, int versnum, int procnum,
99 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out);
100
101 /*
102 * This command queries the NFS mount daemon for it's mount list and/or
103 * it's exports list and prints them out.
104 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A"
105 * and the "Network File System Protocol XXX.."
106 * for detailed information on the protocol.
107 */
108 int
main(int argc,char ** argv)109 main(int argc, char **argv)
110 {
111 register struct exportslist *exp;
112 register struct grouplist *grp;
113 register int rpcs = 0, mntvers = 3;
114 const char *host;
115 int ch, estat;
116
117 while ((ch = getopt(argc, argv, "ade13")) != -1)
118 switch (ch) {
119 case 'a':
120 if (type == 0) {
121 type = ALL;
122 rpcs |= DODUMP;
123 } else
124 usage();
125 break;
126 case 'd':
127 if (type == 0) {
128 type = DIRS;
129 rpcs |= DODUMP;
130 } else
131 usage();
132 break;
133 case 'e':
134 rpcs |= DOEXPORTS;
135 break;
136 case '1':
137 mntvers = 1;
138 break;
139 case '3':
140 mntvers = 3;
141 break;
142 case '?':
143 default:
144 usage();
145 }
146 argc -= optind;
147 argv += optind;
148
149 if (argc > 0)
150 host = *argv;
151 else
152 host = "localhost";
153
154 if (rpcs == 0)
155 rpcs = DODUMP;
156
157 if (rpcs & DODUMP)
158 if ((estat = tcp_callrpc(host, MOUNTPROG, mntvers,
159 MOUNTPROC_DUMP, (xdrproc_t)xdr_void, (char *)0,
160 (xdrproc_t)xdr_mntdump, (char *)&mntdump)) != 0) {
161 clnt_perrno(estat);
162 errx(1, "can't do mountdump rpc");
163 }
164 if (rpcs & DOEXPORTS)
165 if ((estat = tcp_callrpc(host, MOUNTPROG, mntvers,
166 MOUNTPROC_EXPORT, (xdrproc_t)xdr_void, (char *)0,
167 (xdrproc_t)xdr_exportslist, (char *)&exportslist)) != 0) {
168 clnt_perrno(estat);
169 errx(1, "can't do exports rpc");
170 }
171
172 /* Now just print out the results */
173 if (rpcs & DODUMP) {
174 switch (type) {
175 case ALL:
176 printf("All mount points on %s:\n", host);
177 break;
178 case DIRS:
179 printf("Directories on %s:\n", host);
180 break;
181 default:
182 printf("Hosts on %s:\n", host);
183 break;
184 };
185 print_dump(mntdump);
186 }
187 if (rpcs & DOEXPORTS) {
188 printf("Exports list on %s:\n", host);
189 exp = exportslist;
190 while (exp) {
191 printf("%-34s ", exp->ex_dirp);
192 grp = exp->ex_groups;
193 if (grp == NULL) {
194 printf("Everyone\n");
195 } else {
196 while (grp) {
197 printf("%s ", grp->gr_name);
198 grp = grp->gr_next;
199 }
200 printf("\n");
201 }
202 exp = exp->ex_next;
203 }
204 }
205 exit(0);
206 }
207
208 /*
209 * tcp_callrpc has the same interface as callrpc, but tries to
210 * use tcp as transport method in order to handle large replies.
211 */
212 int
tcp_callrpc(const char * host,int prognum,int versnum,int procnum,xdrproc_t inproc,char * in,xdrproc_t outproc,char * out)213 tcp_callrpc(const char *host, int prognum, int versnum, int procnum,
214 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out)
215 {
216 CLIENT *client;
217 struct timeval timeout;
218 int rval;
219
220 if ((client = clnt_create(host, prognum, versnum, "tcp")) == NULL &&
221 (client = clnt_create(host, prognum, versnum, "udp")) == NULL)
222 return ((int) rpc_createerr.cf_stat);
223
224 timeout.tv_sec = 25;
225 timeout.tv_usec = 0;
226 rval = (int) clnt_call(client, procnum,
227 inproc, in,
228 outproc, out,
229 timeout);
230 clnt_destroy(client);
231 return rval;
232 }
233
234 /*
235 * Xdr routine for retrieving the mount dump list
236 */
237 int
xdr_mntdump(XDR * xdrsp,struct mountlist ** mlp)238 xdr_mntdump(XDR *xdrsp, struct mountlist **mlp)
239 {
240 register struct mountlist *mp;
241 register struct mountlist *tp;
242 register struct mountlist **otp;
243 int val, val2;
244 int bool;
245 char *strp;
246
247 *mlp = (struct mountlist *)0;
248 if (!xdr_bool(xdrsp, &bool))
249 return (0);
250 while (bool) {
251 mp = (struct mountlist *)malloc(sizeof(struct mountlist));
252 if (mp == NULL)
253 return (0);
254 mp->ml_left = mp->ml_right = (struct mountlist *)0;
255 strp = mp->ml_host;
256 if (!xdr_string(xdrsp, &strp, MNTNAMLEN))
257 return (0);
258 strp = mp->ml_dirp;
259 if (!xdr_string(xdrsp, &strp, MNTPATHLEN))
260 return (0);
261
262 /*
263 * Build a binary tree on sorted order of either host or dirp.
264 * Drop any duplications.
265 */
266 if (*mlp == NULL) {
267 *mlp = mp;
268 } else {
269 tp = *mlp;
270 while (tp) {
271 val = strcmp(mp->ml_host, tp->ml_host);
272 val2 = strcmp(mp->ml_dirp, tp->ml_dirp);
273 switch (type) {
274 case ALL:
275 if (val == 0) {
276 if (val2 == 0) {
277 free((caddr_t)mp);
278 goto next;
279 }
280 val = val2;
281 }
282 break;
283 case DIRS:
284 if (val2 == 0) {
285 free((caddr_t)mp);
286 goto next;
287 }
288 val = val2;
289 break;
290 default:
291 if (val == 0) {
292 free((caddr_t)mp);
293 goto next;
294 }
295 break;
296 };
297 if (val < 0) {
298 otp = &tp->ml_left;
299 tp = tp->ml_left;
300 } else {
301 otp = &tp->ml_right;
302 tp = tp->ml_right;
303 }
304 }
305 *otp = mp;
306 }
307 next:
308 if (!xdr_bool(xdrsp, &bool))
309 return (0);
310 }
311 return (1);
312 }
313
314 /*
315 * Xdr routine to retrieve exports list
316 */
317 int
xdr_exportslist(XDR * xdrsp,struct exportslist ** exp)318 xdr_exportslist(XDR *xdrsp, struct exportslist **exp)
319 {
320 register struct exportslist *ep;
321 register struct grouplist *gp;
322 int bool, grpbool;
323 char *strp;
324
325 *exp = (struct exportslist *)0;
326 if (!xdr_bool(xdrsp, &bool))
327 return (0);
328 while (bool) {
329 ep = (struct exportslist *)malloc(sizeof(struct exportslist));
330 if (ep == NULL)
331 return (0);
332 ep->ex_groups = (struct grouplist *)0;
333 strp = ep->ex_dirp;
334 if (!xdr_string(xdrsp, &strp, MNTPATHLEN))
335 return (0);
336 if (!xdr_bool(xdrsp, &grpbool))
337 return (0);
338 while (grpbool) {
339 gp = (struct grouplist *)malloc(sizeof(struct grouplist));
340 if (gp == NULL)
341 return (0);
342 strp = gp->gr_name;
343 if (!xdr_string(xdrsp, &strp, MNTNAMLEN))
344 return (0);
345 gp->gr_next = ep->ex_groups;
346 ep->ex_groups = gp;
347 if (!xdr_bool(xdrsp, &grpbool))
348 return (0);
349 }
350 ep->ex_next = *exp;
351 *exp = ep;
352 if (!xdr_bool(xdrsp, &bool))
353 return (0);
354 }
355 return (1);
356 }
357
358 static void
usage(void)359 usage(void)
360 {
361 fprintf(stderr, "usage: showmount [-a | -d] [-e3] [host]\n");
362 exit(1);
363 }
364
365 /*
366 * Print the binary tree in inorder so that output is sorted.
367 */
368 void
print_dump(struct mountlist * mp)369 print_dump(struct mountlist *mp)
370 {
371
372 if (mp == NULL)
373 return;
374 if (mp->ml_left)
375 print_dump(mp->ml_left);
376 switch (type) {
377 case ALL:
378 printf("%s:%s\n", mp->ml_host, mp->ml_dirp);
379 break;
380 case DIRS:
381 printf("%s\n", mp->ml_dirp);
382 break;
383 default:
384 printf("%s\n", mp->ml_host);
385 break;
386 };
387 if (mp->ml_right)
388 print_dump(mp->ml_right);
389 }
390