Bring in a transport-independent RPC (TI-RPC).
[dragonfly.git] / usr.bin / showmount / showmount.c
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  * 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  * @(#) 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 1.16 2005/05/21 09:55:08 ru Exp $
39  * $DragonFly: src/usr.bin/showmount/showmount.c,v 1.5 2005/09/05 04:22:07 swildner Exp $
40  */
41
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>
47
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>
54
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <string.h>
58 #include <unistd.h>
59
60 /* Constant defs */
61 #define ALL     1
62 #define DIRS    2
63
64 #define DODUMP          0x1
65 #define DOEXPORTS       0x2
66
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];
72 };
73
74 struct grouplist {
75         struct grouplist *gr_next;
76         char    gr_name[RPCMNT_NAMELEN+1];
77 };
78
79 struct exportslist {
80         struct exportslist *ex_next;
81         struct grouplist *ex_groups;
82         char    ex_dirp[RPCMNT_PATHLEN+1];
83 };
84
85 static struct mountlist *mntdump;
86 static struct exportslist *exports;
87 static int type = 0;
88
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 *, int, int, int, xdrproc_t, char *, xdrproc_t,
94                 char *);
95
96 /*
97  * This command queries the NFS mount daemon for it's mount list and/or
98  * it's exports list and prints them out.
99  * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A"
100  * and the "Network File System Protocol XXX.."
101  * for detailed information on the protocol.
102  */
103 int
104 main(int argc, char **argv)
105 {
106         struct exportslist *exp;
107         struct grouplist *grp;
108         int rpcs = 0, mntvers = 1;
109         const char *host;
110         int ch, estat;
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                 case '?':
135                 default:
136                         usage();
137                 }
138         argc -= optind;
139         argv += optind;
140
141         if (argc > 0)
142                 host = *argv;
143         else
144                 host = "localhost";
145
146         if (rpcs == 0)
147                 rpcs = DODUMP;
148
149         if (rpcs & DODUMP)
150                 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers,
151                         RPCMNT_DUMP, (xdrproc_t)xdr_void, NULL,
152                         (xdrproc_t)xdr_mntdump, (char *)&mntdump)) != 0) {
153                         clnt_perrno(estat);
154                         errx(1, "can't do mountdump rpc");
155                 }
156         if (rpcs & DOEXPORTS)
157                 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers,
158                         RPCMNT_EXPORT, (xdrproc_t)xdr_void, NULL,
159                         (xdrproc_t)xdr_exports, (char *)&exports)) != 0) {
160                         clnt_perrno(estat);
161                         errx(1, "can't do exports rpc");
162                 }
163
164         /* Now just print out the results */
165         if (rpcs & DODUMP) {
166                 switch (type) {
167                 case ALL:
168                         printf("All mount points on %s:\n", host);
169                         break;
170                 case DIRS:
171                         printf("Directories on %s:\n", host);
172                         break;
173                 default:
174                         printf("Hosts on %s:\n", host);
175                         break;
176                 };
177                 print_dump(mntdump);
178         }
179         if (rpcs & DOEXPORTS) {
180                 printf("Exports list on %s:\n", host);
181                 exp = exports;
182                 while (exp) {
183                         printf("%-35s", exp->ex_dirp);
184                         grp = exp->ex_groups;
185                         if (grp == NULL) {
186                                 printf("Everyone\n");
187                         } else {
188                                 while (grp) {
189                                         printf("%s ", grp->gr_name);
190                                         grp = grp->gr_next;
191                                 }
192                                 printf("\n");
193                         }
194                         exp = exp->ex_next;
195                 }
196         }
197         exit(0);
198 }
199
200 /*
201  * tcp_callrpc has the same interface as callrpc, but tries to
202  * use tcp as transport method in order to handle large replies.
203  */
204 int
205 tcp_callrpc(const char *host, int prognum, int versnum, int procnum,
206             xdrproc_t inproc, char *in, xdrproc_t outproc, char *out)
207 {
208         CLIENT *client;
209         struct timeval timeout;
210         int rval;
211
212         if ((client = clnt_create(host, prognum, versnum, "tcp")) == NULL &&
213             (client = clnt_create(host, prognum, versnum, "udp")) == NULL)
214                 return ((int) rpc_createerr.cf_stat);
215
216         timeout.tv_sec = 25;
217         timeout.tv_usec = 0;
218         rval = (int) clnt_call(client, procnum,
219                                inproc, in,
220                                outproc, out,
221                                timeout);
222         clnt_destroy(client);
223         return rval;
224 }
225
226 /*
227  * Xdr routine for retrieving the mount dump list
228  */
229 int
230 xdr_mntdump(XDR *xdrsp, struct mountlist **mlp)
231 {
232         struct mountlist *mp;
233         struct mountlist *tp;
234         struct mountlist **otp = NULL;
235         int val, val2;
236         int bool;
237         char *strp;
238
239         *mlp = NULL;
240         if (!xdr_bool(xdrsp, &bool))
241                 return (0);
242         while (bool) {
243                 mp = (struct mountlist *)malloc(sizeof(struct mountlist));
244                 if (mp == NULL)
245                         return (0);
246                 mp->ml_left = mp->ml_right = NULL;
247                 strp = mp->ml_host;
248                 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
249                         return (0);
250                 strp = mp->ml_dirp;
251                 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
252                         return (0);
253
254                 /*
255                  * Build a binary tree on sorted order of either host or dirp.
256                  * Drop any duplications.
257                  */
258                 if (*mlp == NULL) {
259                         *mlp = mp;
260                 } else {
261                         tp = *mlp;
262                         while (tp) {
263                                 val = strcmp(mp->ml_host, tp->ml_host);
264                                 val2 = strcmp(mp->ml_dirp, tp->ml_dirp);
265                                 switch (type) {
266                                 case ALL:
267                                         if (val == 0) {
268                                                 if (val2 == 0) {
269                                                         free(mp);
270                                                         goto next;
271                                                 }
272                                                 val = val2;
273                                         }
274                                         break;
275                                 case DIRS:
276                                         if (val2 == 0) {
277                                                 free(mp);
278                                                 goto next;
279                                         }
280                                         val = val2;
281                                         break;
282                                 default:
283                                         if (val == 0) {
284                                                 free(mp);
285                                                 goto next;
286                                         }
287                                         break;
288                                 };
289                                 if (val < 0) {
290                                         otp = &tp->ml_left;
291                                         tp = tp->ml_left;
292                                 } else {
293                                         otp = &tp->ml_right;
294                                         tp = tp->ml_right;
295                                 }
296                         }
297                         *otp = mp;
298                 }
299 next:
300                 if (!xdr_bool(xdrsp, &bool))
301                         return (0);
302         }
303         return (1);
304 }
305
306 /*
307  * Xdr routine to retrieve exports list
308  */
309 int
310 xdr_exports(XDR *xdrsp, struct exportslist **exp)
311 {
312         struct exportslist *ep;
313         struct grouplist *gp;
314         int bool, grpbool;
315         char *strp;
316
317         *exp = NULL;
318         if (!xdr_bool(xdrsp, &bool))
319                 return (0);
320         while (bool) {
321                 ep = (struct exportslist *)malloc(sizeof(struct exportslist));
322                 if (ep == NULL)
323                         return (0);
324                 ep->ex_groups = NULL;
325                 strp = ep->ex_dirp;
326                 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
327                         return (0);
328                 if (!xdr_bool(xdrsp, &grpbool))
329                         return (0);
330                 while (grpbool) {
331                         gp = (struct grouplist *)malloc(sizeof(struct grouplist));
332                         if (gp == NULL)
333                                 return (0);
334                         strp = gp->gr_name;
335                         if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
336                                 return (0);
337                         gp->gr_next = ep->ex_groups;
338                         ep->ex_groups = gp;
339                         if (!xdr_bool(xdrsp, &grpbool))
340                                 return (0);
341                 }
342                 ep->ex_next = *exp;
343                 *exp = ep;
344                 if (!xdr_bool(xdrsp, &bool))
345                         return (0);
346         }
347         return (1);
348 }
349
350 static void
351 usage(void)
352 {
353         fprintf(stderr, "usage: showmount [-a | -d] [-e3] [host]\n");
354         exit(1);
355 }
356
357 /*
358  * Print the binary tree in inorder so that output is sorted.
359  */
360 void
361 print_dump(struct mountlist *mp)
362 {
363
364         if (mp == NULL)
365                 return;
366         if (mp->ml_left)
367                 print_dump(mp->ml_left);
368         switch (type) {
369         case ALL:
370                 printf("%s:%s\n", mp->ml_host, mp->ml_dirp);
371                 break;
372         case DIRS:
373                 printf("%s\n", mp->ml_dirp);
374                 break;
375         default:
376                 printf("%s\n", mp->ml_host);
377                 break;
378         };
379         if (mp->ml_right)
380                 print_dump(mp->ml_right);
381 }