drm/linux: Improve spin_unlock_irqrestore()'s implementation
[dragonfly.git] / usr.bin / showmount / showmount.c
blob2b6597071adb0d953c12b6077e71364edb5956f3
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. 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.
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.
32 * @(#) Copyright (c) 1989, 1993, 1995 The Regents of the University of California. All rights reserved.
33 * @(#)showmount.c 8.3 (Berkeley) 3/29/95
34 * $FreeBSD: src/usr.bin/showmount/showmount.c,v 1.16 2005/05/21 09:55:08 ru Exp $
37 #include <sys/types.h>
38 #include <sys/queue.h>
39 #include <sys/file.h>
40 #include <sys/socket.h>
41 #include <sys/socketvar.h>
43 #include <err.h>
44 #include <netdb.h>
45 #include <rpc/rpc.h>
46 #include <rpc/pmap_clnt.h>
47 #include <rpc/pmap_prot.h>
48 #include <nfs/rpcv2.h>
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <string.h>
53 #include <unistd.h>
54 #include <vis.h>
56 /* Constant defs */
57 #define ALL 1
58 #define DIRS 2
60 #define DODUMP 0x1
61 #define DOEXPORTS 0x2
62 #define DOPARSABLEEXPORTS 0x4
64 struct mountlist {
65 struct mountlist *ml_left;
66 struct mountlist *ml_right;
67 char ml_host[RPCMNT_NAMELEN+1];
68 char ml_dirp[RPCMNT_PATHLEN+1];
71 struct grouplist {
72 struct grouplist *gr_next;
73 char gr_name[RPCMNT_NAMELEN+1];
76 struct exportslist {
77 struct exportslist *ex_next;
78 struct grouplist *ex_groups;
79 char ex_dirp[RPCMNT_PATHLEN+1];
82 static struct mountlist *mntdump;
83 static struct exportslist *exports;
84 static int type = 0;
86 void print_dump(struct mountlist *);
87 static void usage(void);
88 int xdr_mntdump(XDR *, struct mountlist **);
89 int xdr_exports(XDR *, struct exportslist **);
90 int tcp_callrpc(const char *, int, int, int, xdrproc_t, char *, xdrproc_t,
91 char *);
94 * This command queries the NFS mount daemon for it's mount list and/or
95 * it's exports list and prints them out.
96 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A"
97 * and the "Network File System Protocol XXX.."
98 * for detailed information on the protocol.
101 main(int argc, char **argv)
103 struct exportslist *exp;
104 struct grouplist *grp;
105 int rpcs = 0, mntvers = 1;
106 const char *host;
107 int ch, estat, nbytes;
108 char strvised[1024 * 4 + 1];
110 while ((ch = getopt(argc, argv, "adEe3")) != -1)
111 switch (ch) {
112 case 'a':
113 if (type == 0) {
114 type = ALL;
115 rpcs |= DODUMP;
116 } else
117 usage();
118 break;
119 case 'd':
120 if (type == 0) {
121 type = DIRS;
122 rpcs |= DODUMP;
123 } else
124 usage();
125 break;
126 case 'E':
127 rpcs |= DOPARSABLEEXPORTS;
128 break;
129 case 'e':
130 rpcs |= DOEXPORTS;
131 break;
132 case '3':
133 mntvers = 3;
134 break;
135 case '?':
136 default:
137 usage();
139 argc -= optind;
140 argv += optind;
142 if ((rpcs & DOPARSABLEEXPORTS) != 0) {
143 if ((rpcs & DOEXPORTS) != 0)
144 errx(1, "-E cannot be used with -e");
145 if ((rpcs & DODUMP) != 0)
146 errx(1, "-E cannot be used with -a or -d");
149 if (argc > 0)
150 host = *argv;
151 else
152 host = "localhost";
154 if (rpcs == 0)
155 rpcs = DODUMP;
157 if (rpcs & DODUMP)
158 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers,
159 RPCMNT_DUMP, (xdrproc_t)xdr_void, NULL,
160 (xdrproc_t)xdr_mntdump, (char *)&mntdump)) != 0) {
161 clnt_perrno(estat);
162 errx(1, "can't do mountdump rpc");
164 if (rpcs & (DOEXPORTS | DOPARSABLEEXPORTS))
165 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers,
166 RPCMNT_EXPORT, (xdrproc_t)xdr_void, NULL,
167 (xdrproc_t)xdr_exports, (char *)&exports)) != 0) {
168 clnt_perrno(estat);
169 errx(1, "can't do exports rpc");
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;
185 print_dump(mntdump);
187 if (rpcs & DOEXPORTS) {
188 printf("Exports list on %s:\n", host);
189 exp = exports;
190 while (exp) {
191 printf("%-35s", 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;
200 printf("\n");
202 exp = exp->ex_next;
205 if (rpcs & DOPARSABLEEXPORTS) {
206 exp = exports;
207 while (exp) {
208 nbytes = strnvis(strvised, exp->ex_dirp,
209 sizeof(strvised), VIS_GLOB | VIS_NL);
210 if (nbytes == -1)
211 err(1, "strsnvis");
212 printf("%s\n", strvised);
213 exp = exp->ex_next;
216 exit(0);
220 * tcp_callrpc has the same interface as callrpc, but tries to
221 * use tcp as transport method in order to handle large replies.
224 tcp_callrpc(const char *host, int prognum, int versnum, int procnum,
225 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out)
227 CLIENT *client;
228 struct timeval timeout;
229 int rval;
231 if ((client = clnt_create(host, prognum, versnum, "tcp")) == NULL &&
232 (client = clnt_create(host, prognum, versnum, "udp")) == NULL)
233 return ((int) rpc_createerr.cf_stat);
235 timeout.tv_sec = 25;
236 timeout.tv_usec = 0;
237 rval = (int) clnt_call(client, procnum,
238 inproc, in,
239 outproc, out,
240 timeout);
241 clnt_destroy(client);
242 return rval;
246 * Xdr routine for retrieving the mount dump list
249 xdr_mntdump(XDR *xdrsp, struct mountlist **mlp)
251 struct mountlist *mp;
252 struct mountlist *tp;
253 struct mountlist **otp = NULL;
254 int val, val2;
255 int bool;
256 char *strp;
258 *mlp = NULL;
259 if (!xdr_bool(xdrsp, &bool))
260 return (0);
261 while (bool) {
262 mp = (struct mountlist *)malloc(sizeof(struct mountlist));
263 if (mp == NULL)
264 return (0);
265 mp->ml_left = mp->ml_right = NULL;
266 strp = mp->ml_host;
267 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
268 return (0);
269 strp = mp->ml_dirp;
270 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
271 return (0);
274 * Build a binary tree on sorted order of either host or dirp.
275 * Drop any duplications.
277 if (*mlp == NULL) {
278 *mlp = mp;
279 } else {
280 tp = *mlp;
281 while (tp) {
282 val = strcmp(mp->ml_host, tp->ml_host);
283 val2 = strcmp(mp->ml_dirp, tp->ml_dirp);
284 switch (type) {
285 case ALL:
286 if (val == 0) {
287 if (val2 == 0) {
288 free(mp);
289 goto next;
291 val = val2;
293 break;
294 case DIRS:
295 if (val2 == 0) {
296 free(mp);
297 goto next;
299 val = val2;
300 break;
301 default:
302 if (val == 0) {
303 free(mp);
304 goto next;
306 break;
308 if (val < 0) {
309 otp = &tp->ml_left;
310 tp = tp->ml_left;
311 } else {
312 otp = &tp->ml_right;
313 tp = tp->ml_right;
316 *otp = mp;
318 next:
319 if (!xdr_bool(xdrsp, &bool))
320 return (0);
322 return (1);
326 * Xdr routine to retrieve exports list
329 xdr_exports(XDR *xdrsp, struct exportslist **exp)
331 struct exportslist *ep;
332 struct grouplist *gp;
333 int bool, grpbool;
334 char *strp;
336 *exp = NULL;
337 if (!xdr_bool(xdrsp, &bool))
338 return (0);
339 while (bool) {
340 ep = (struct exportslist *)malloc(sizeof(struct exportslist));
341 if (ep == NULL)
342 return (0);
343 ep->ex_groups = NULL;
344 strp = ep->ex_dirp;
345 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
346 return (0);
347 if (!xdr_bool(xdrsp, &grpbool))
348 return (0);
349 while (grpbool) {
350 gp = (struct grouplist *)malloc(sizeof(struct grouplist));
351 if (gp == NULL)
352 return (0);
353 strp = gp->gr_name;
354 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
355 return (0);
356 gp->gr_next = ep->ex_groups;
357 ep->ex_groups = gp;
358 if (!xdr_bool(xdrsp, &grpbool))
359 return (0);
361 ep->ex_next = *exp;
362 *exp = ep;
363 if (!xdr_bool(xdrsp, &bool))
364 return (0);
366 return (1);
369 static void
370 usage(void)
372 fprintf(stderr, "usage: showmount [-a | -d] [-e3] [host]\n");
373 exit(1);
377 * Print the binary tree in inorder so that output is sorted.
379 void
380 print_dump(struct mountlist *mp)
383 if (mp == NULL)
384 return;
385 if (mp->ml_left)
386 print_dump(mp->ml_left);
387 switch (type) {
388 case ALL:
389 printf("%s:%s\n", mp->ml_host, mp->ml_dirp);
390 break;
391 case DIRS:
392 printf("%s\n", mp->ml_dirp);
393 break;
394 default:
395 printf("%s\n", mp->ml_host);
396 break;
398 if (mp->ml_right)
399 print_dump(mp->ml_right);