showmount.c revision 78130
1259412Sluigi/* 2260368Sluigi * Copyright (c) 1989, 1993, 1995 3259412Sluigi * The Regents of the University of California. All rights reserved. 4259412Sluigi * 5259412Sluigi * This code is derived from software contributed to Berkeley by 6259412Sluigi * Rick Macklem at The University of Guelph. 7259412Sluigi * 8259412Sluigi * Redistribution and use in source and binary forms, with or without 9259412Sluigi * modification, are permitted provided that the following conditions 10259412Sluigi * are met: 11259412Sluigi * 1. Redistributions of source code must retain the above copyright 12259412Sluigi * notice, this list of conditions and the following disclaimer. 13259412Sluigi * 2. Redistributions in binary form must reproduce the above copyright 14259412Sluigi * notice, this list of conditions and the following disclaimer in the 15259412Sluigi * documentation and/or other materials provided with the distribution. 16259412Sluigi * 3. All advertising materials mentioning features or use of this software 17259412Sluigi * must display the following acknowledgement: 18259412Sluigi * This product includes software developed by the University of 19259412Sluigi * California, Berkeley and its contributors. 20259412Sluigi * 4. Neither the name of the University nor the names of its contributors 21259412Sluigi * may be used to endorse or promote products derived from this software 22259412Sluigi * without specific prior written permission. 23259412Sluigi * 24259412Sluigi * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25259412Sluigi * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26259412Sluigi * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27259412Sluigi * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28259412Sluigi * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29259412Sluigi * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30259412Sluigi * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31259412Sluigi * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32259412Sluigi * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33259412Sluigi * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34259412Sluigi * SUCH DAMAGE. 35259412Sluigi */ 36259412Sluigi 37259412Sluigi#ifndef lint 38259412Sluigistatic const char copyright[] = 39259412Sluigi"@(#) Copyright (c) 1989, 1993, 1995\n\ 40259412Sluigi The Regents of the University of California. All rights reserved.\n"; 41259412Sluigi#endif /* not lint */ 42259412Sluigi 43259412Sluigi#ifndef lint 44259412Sluigi#if 0 45259412Sluigistatic char sccsid[] = "@(#)showmount.c 8.3 (Berkeley) 3/29/95"; 46259412Sluigi#endif 47259412Sluigistatic const char rcsid[] = 48259412Sluigi "$FreeBSD: head/usr.bin/showmount/showmount.c 78130 2001-06-12 03:44:35Z dd $"; 49259412Sluigi#endif /* not lint */ 50260368Sluigi 51259412Sluigi#include <sys/types.h> 52259412Sluigi#include <sys/queue.h> 53259412Sluigi#include <sys/file.h> 54259412Sluigi#include <sys/socket.h> 55259412Sluigi#include <sys/socketvar.h> 56259412Sluigi 57260368Sluigi#include <err.h> 58259412Sluigi#include <netdb.h> 59259412Sluigi#include <rpc/rpc.h> 60259412Sluigi#include <rpc/pmap_clnt.h> 61259412Sluigi#include <rpc/pmap_prot.h> 62259412Sluigi#include <nfs/rpcv2.h> 63260368Sluigi 64259412Sluigi#include <stdio.h> 65259412Sluigi#include <stdlib.h> 66259412Sluigi#include <string.h> 67259412Sluigi#include <unistd.h> 68259412Sluigi 69259412Sluigi/* Constant defs */ 70259412Sluigi#define ALL 1 71259412Sluigi#define DIRS 2 72259412Sluigi 73259412Sluigi#define DODUMP 0x1 74259412Sluigi#define DOEXPORTS 0x2 75259412Sluigi 76260368Sluigistruct mountlist { 77259412Sluigi struct mountlist *ml_left; 78259412Sluigi struct mountlist *ml_right; 79267177Sluigi char ml_host[RPCMNT_NAMELEN+1]; 80259412Sluigi char ml_dirp[RPCMNT_PATHLEN+1]; 81267177Sluigi}; 82259412Sluigi 83259412Sluigistruct grouplist { 84260368Sluigi struct grouplist *gr_next; 85259412Sluigi char gr_name[RPCMNT_NAMELEN+1]; 86259412Sluigi}; 87259412Sluigi 88259412Sluigistruct exportslist { 89259412Sluigi struct exportslist *ex_next; 90260368Sluigi struct grouplist *ex_groups; 91259412Sluigi char ex_dirp[RPCMNT_PATHLEN+1]; 92259412Sluigi}; 93259412Sluigi 94259412Sluigistatic struct mountlist *mntdump; 95259412Sluigistatic struct exportslist *exports; 96259412Sluigistatic int type = 0; 97259412Sluigi 98259412Sluigivoid print_dump __P((struct mountlist *)); 99259412Sluigistatic void usage __P((void)); 100259412Sluigiint xdr_mntdump __P((XDR *, struct mountlist **)); 101259412Sluigiint xdr_exports __P((XDR *, struct exportslist **)); 102259412Sluigiint tcp_callrpc __P((char *host, 103259412Sluigi int prognum, int versnum, int procnum, 104259412Sluigi xdrproc_t inproc, char *in, 105259412Sluigi xdrproc_t outproc, char *out)); 106259412Sluigi 107259412Sluigi/* 108260368Sluigi * This command queries the NFS mount daemon for it's mount list and/or 109259412Sluigi * it's exports list and prints them out. 110259412Sluigi * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A" 111259412Sluigi * and the "Network File System Protocol XXX.." 112259412Sluigi * for detailed information on the protocol. 113267177Sluigi */ 114259412Sluigiint 115267177Sluigimain(argc, argv) 116259412Sluigi int argc; 117259412Sluigi char **argv; 118259412Sluigi{ 119259412Sluigi register struct exportslist *exp; 120260368Sluigi register struct grouplist *grp; 121259412Sluigi register int rpcs = 0, mntvers = 1; 122259412Sluigi char ch; 123259412Sluigi char *host; 124259412Sluigi int estat; 125259412Sluigi 126260368Sluigi while ((ch = getopt(argc, argv, "ade3")) != -1) 127259412Sluigi switch((char)ch) { 128259412Sluigi case 'a': 129259412Sluigi if (type == 0) { 130259412Sluigi type = ALL; 131259412Sluigi rpcs |= DODUMP; 132259412Sluigi } else 133259412Sluigi usage(); 134259412Sluigi break; 135259412Sluigi case 'd': 136259412Sluigi if (type == 0) { 137259412Sluigi type = DIRS; 138259412Sluigi rpcs |= DODUMP; 139259412Sluigi } else 140259412Sluigi usage(); 141259412Sluigi break; 142260368Sluigi case 'e': 143259412Sluigi rpcs |= DOEXPORTS; 144259412Sluigi break; 145259412Sluigi case '3': 146259412Sluigi mntvers = 3; 147259412Sluigi break; 148260368Sluigi case '?': 149259412Sluigi default: 150259412Sluigi usage(); 151259412Sluigi } 152259412Sluigi argc -= optind; 153259412Sluigi argv += optind; 154260368Sluigi 155259412Sluigi if (argc > 0) 156259412Sluigi host = *argv; 157259412Sluigi else 158259412Sluigi host = "localhost"; 159259412Sluigi 160259412Sluigi if (rpcs == 0) 161259412Sluigi rpcs = DODUMP; 162259412Sluigi 163259412Sluigi if (rpcs & DODUMP) 164 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers, 165 RPCMNT_DUMP, xdr_void, (char *)0, 166 xdr_mntdump, (char *)&mntdump)) != 0) { 167 clnt_perrno(estat); 168 errx(1, "can't do mountdump rpc"); 169 } 170 if (rpcs & DOEXPORTS) 171 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers, 172 RPCMNT_EXPORT, xdr_void, (char *)0, 173 xdr_exports, (char *)&exports)) != 0) { 174 clnt_perrno(estat); 175 errx(1, "can't do exports rpc"); 176 } 177 178 /* Now just print out the results */ 179 if (rpcs & DODUMP) { 180 switch (type) { 181 case ALL: 182 printf("All mount points on %s:\n", host); 183 break; 184 case DIRS: 185 printf("Directories on %s:\n", host); 186 break; 187 default: 188 printf("Hosts on %s:\n", host); 189 break; 190 }; 191 print_dump(mntdump); 192 } 193 if (rpcs & DOEXPORTS) { 194 printf("Exports list on %s:\n", host); 195 exp = exports; 196 while (exp) { 197 printf("%-35s", exp->ex_dirp); 198 grp = exp->ex_groups; 199 if (grp == NULL) { 200 printf("Everyone\n"); 201 } else { 202 while (grp) { 203 printf("%s ", grp->gr_name); 204 grp = grp->gr_next; 205 } 206 printf("\n"); 207 } 208 exp = exp->ex_next; 209 } 210 } 211 exit(0); 212} 213 214/* 215 * tcp_callrpc has the same interface as callrpc, but tries to 216 * use tcp as transport method in order to handle large replies. 217 */ 218int 219tcp_callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out) 220 char *host; 221 int prognum; 222 int versnum; 223 int procnum; 224 xdrproc_t inproc; 225 char *in; 226 xdrproc_t outproc; 227 char *out; 228{ 229 CLIENT *client; 230 struct timeval timeout; 231 int rval; 232 233 if ((client = clnt_create(host, prognum, versnum, "tcp")) == NULL && 234 (client = clnt_create(host, prognum, versnum, "udp")) == NULL) 235 return ((int) rpc_createerr.cf_stat); 236 237 timeout.tv_sec = 25; 238 timeout.tv_usec = 0; 239 rval = (int) clnt_call(client, procnum, 240 inproc, in, 241 outproc, out, 242 timeout); 243 clnt_destroy(client); 244 return rval; 245} 246 247/* 248 * Xdr routine for retrieving the mount dump list 249 */ 250int 251xdr_mntdump(xdrsp, mlp) 252 XDR *xdrsp; 253 struct mountlist **mlp; 254{ 255 register struct mountlist *mp; 256 register struct mountlist *tp; 257 register struct mountlist **otp; 258 int val, val2; 259 int bool; 260 char *strp; 261 262 *mlp = (struct mountlist *)0; 263 if (!xdr_bool(xdrsp, &bool)) 264 return (0); 265 while (bool) { 266 mp = (struct mountlist *)malloc(sizeof(struct mountlist)); 267 if (mp == NULL) 268 return (0); 269 mp->ml_left = mp->ml_right = (struct mountlist *)0; 270 strp = mp->ml_host; 271 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 272 return (0); 273 strp = mp->ml_dirp; 274 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 275 return (0); 276 277 /* 278 * Build a binary tree on sorted order of either host or dirp. 279 * Drop any duplications. 280 */ 281 if (*mlp == NULL) { 282 *mlp = mp; 283 } else { 284 tp = *mlp; 285 while (tp) { 286 val = strcmp(mp->ml_host, tp->ml_host); 287 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 288 switch (type) { 289 case ALL: 290 if (val == 0) { 291 if (val2 == 0) { 292 free((caddr_t)mp); 293 goto next; 294 } 295 val = val2; 296 } 297 break; 298 case DIRS: 299 if (val2 == 0) { 300 free((caddr_t)mp); 301 goto next; 302 } 303 val = val2; 304 break; 305 default: 306 if (val == 0) { 307 free((caddr_t)mp); 308 goto next; 309 } 310 break; 311 }; 312 if (val < 0) { 313 otp = &tp->ml_left; 314 tp = tp->ml_left; 315 } else { 316 otp = &tp->ml_right; 317 tp = tp->ml_right; 318 } 319 } 320 *otp = mp; 321 } 322next: 323 if (!xdr_bool(xdrsp, &bool)) 324 return (0); 325 } 326 return (1); 327} 328 329/* 330 * Xdr routine to retrieve exports list 331 */ 332int 333xdr_exports(xdrsp, exp) 334 XDR *xdrsp; 335 struct exportslist **exp; 336{ 337 register struct exportslist *ep; 338 register struct grouplist *gp; 339 int bool, grpbool; 340 char *strp; 341 342 *exp = (struct exportslist *)0; 343 if (!xdr_bool(xdrsp, &bool)) 344 return (0); 345 while (bool) { 346 ep = (struct exportslist *)malloc(sizeof(struct exportslist)); 347 if (ep == NULL) 348 return (0); 349 ep->ex_groups = (struct grouplist *)0; 350 strp = ep->ex_dirp; 351 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 352 return (0); 353 if (!xdr_bool(xdrsp, &grpbool)) 354 return (0); 355 while (grpbool) { 356 gp = (struct grouplist *)malloc(sizeof(struct grouplist)); 357 if (gp == NULL) 358 return (0); 359 strp = gp->gr_name; 360 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 361 return (0); 362 gp->gr_next = ep->ex_groups; 363 ep->ex_groups = gp; 364 if (!xdr_bool(xdrsp, &grpbool)) 365 return (0); 366 } 367 ep->ex_next = *exp; 368 *exp = ep; 369 if (!xdr_bool(xdrsp, &bool)) 370 return (0); 371 } 372 return (1); 373} 374 375static void 376usage() 377{ 378 fprintf(stderr, "usage: showmount [-ade3] host\n"); 379 exit(1); 380} 381 382/* 383 * Print the binary tree in inorder so that output is sorted. 384 */ 385void 386print_dump(mp) 387 struct mountlist *mp; 388{ 389 390 if (mp == NULL) 391 return; 392 if (mp->ml_left) 393 print_dump(mp->ml_left); 394 switch (type) { 395 case ALL: 396 printf("%s:%s\n", mp->ml_host, mp->ml_dirp); 397 break; 398 case DIRS: 399 printf("%s\n", mp->ml_dirp); 400 break; 401 default: 402 printf("%s\n", mp->ml_host); 403 break; 404 }; 405 if (mp->ml_right) 406 print_dump(mp->ml_right); 407} 408