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 37 #ifndef lint 38 static const char copyright[] = 39 "@(#) Copyright (c) 1989, 1993, 1995\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif not lint 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)showmount.c 8.3 (Berkeley) 3/29/95"; 46 #endif 47 static const char rcsid[] = 48 "$FreeBSD: src/usr.bin/showmount/showmount.c,v 1.8 1999/08/28 01:05:43 peter Exp $"; 49 #endif not lint 50 51 #include <sys/types.h> 52 #include <sys/queue.h> 53 #include <sys/file.h> 54 #include <sys/socket.h> 55 #include <sys/socketvar.h> 56 57 #include <err.h> 58 #include <netdb.h> 59 #include <rpc/rpc.h> 60 #include <rpc/pmap_clnt.h> 61 #include <rpc/pmap_prot.h> 62 #include <nfs/rpcv2.h> 63 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <unistd.h> 68 69 /* Constant defs */ 70 #define ALL 1 71 #define DIRS 2 72 73 #define DODUMP 0x1 74 #define DOEXPORTS 0x2 75 76 struct mountlist { 77 struct mountlist *ml_left; 78 struct mountlist *ml_right; 79 char ml_host[RPCMNT_NAMELEN+1]; 80 char ml_dirp[RPCMNT_PATHLEN+1]; 81 }; 82 83 struct grouplist { 84 struct grouplist *gr_next; 85 char gr_name[RPCMNT_NAMELEN+1]; 86 }; 87 88 struct exportslist { 89 struct exportslist *ex_next; 90 struct grouplist *ex_groups; 91 char ex_dirp[RPCMNT_PATHLEN+1]; 92 }; 93 94 static struct mountlist *mntdump; 95 static struct exportslist *exports; 96 static int type = 0; 97 98 void print_dump __P((struct mountlist *)); 99 static void usage __P((void)); 100 int xdr_mntdump __P((XDR *, struct mountlist **)); 101 int xdr_exports __P((XDR *, struct exportslist **)); 102 int tcp_callrpc __P((char *host, 103 int prognum, int versnum, int procnum, 104 xdrproc_t inproc, char *in, 105 xdrproc_t outproc, char *out)); 106 107 /* 108 * This command queries the NFS mount daemon for it's mount list and/or 109 * it's exports list and prints them out. 110 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A" 111 * and the "Network File System Protocol XXX.." 112 * for detailed information on the protocol. 113 */ 114 int 115 main(argc, argv) 116 int argc; 117 char **argv; 118 { 119 register struct exportslist *exp; 120 register struct grouplist *grp; 121 register int rpcs = 0, mntvers = 1; 122 char ch; 123 char *host; 124 int estat; 125 126 while ((ch = getopt(argc, argv, "ade3")) != -1) 127 switch((char)ch) { 128 case 'a': 129 if (type == 0) { 130 type = ALL; 131 rpcs |= DODUMP; 132 } else 133 usage(); 134 break; 135 case 'd': 136 if (type == 0) { 137 type = DIRS; 138 rpcs |= DODUMP; 139 } else 140 usage(); 141 break; 142 case 'e': 143 rpcs |= DOEXPORTS; 144 break; 145 case '3': 146 mntvers = 3; 147 break; 148 case '?': 149 default: 150 usage(); 151 } 152 argc -= optind; 153 argv += optind; 154 155 if (argc > 0) 156 host = *argv; 157 else 158 host = "localhost"; 159 160 if (rpcs == 0) 161 rpcs = DODUMP; 162 163 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 */ 218 219 int 220 tcp_callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out) 221 char *host; 222 int prognum; 223 int versnum; 224 int procnum; 225 xdrproc_t inproc; 226 char *in; 227 xdrproc_t outproc; 228 char *out; 229 { 230 struct hostent *hp; 231 struct sockaddr_in server_addr; 232 CLIENT *client; 233 int sock; 234 struct timeval timeout; 235 int rval; 236 237 hp = gethostbyname(host); 238 239 if (!hp) 240 return ((int) RPC_UNKNOWNHOST); 241 242 memset(&server_addr,0,sizeof(server_addr)); 243 memcpy((char *) &server_addr.sin_addr, 244 hp->h_addr, 245 hp->h_length); 246 server_addr.sin_len = sizeof(struct sockaddr_in); 247 server_addr.sin_family =AF_INET; 248 server_addr.sin_port = 0; 249 250 sock = RPC_ANYSOCK; 251 252 client = clnttcp_create(&server_addr, 253 (u_long) prognum, 254 (u_long) versnum, &sock, 0, 0); 255 if (!client) { 256 timeout.tv_sec = 5; 257 timeout.tv_usec = 0; 258 server_addr.sin_port = 0; 259 sock = RPC_ANYSOCK; 260 client = clntudp_create(&server_addr, 261 (u_long) prognum, 262 (u_long) versnum, 263 timeout, 264 &sock); 265 } 266 if (!client) 267 return ((int) rpc_createerr.cf_stat); 268 269 timeout.tv_sec = 25; 270 timeout.tv_usec = 0; 271 rval = (int) clnt_call(client, procnum, 272 inproc, in, 273 outproc, out, 274 timeout); 275 clnt_destroy(client); 276 return rval; 277 } 278 279 /* 280 * Xdr routine for retrieving the mount dump list 281 */ 282 int 283 xdr_mntdump(xdrsp, mlp) 284 XDR *xdrsp; 285 struct mountlist **mlp; 286 { 287 register struct mountlist *mp; 288 register struct mountlist *tp; 289 register struct mountlist **otp; 290 int val, val2; 291 int bool; 292 char *strp; 293 294 *mlp = (struct mountlist *)0; 295 if (!xdr_bool(xdrsp, &bool)) 296 return (0); 297 while (bool) { 298 mp = (struct mountlist *)malloc(sizeof(struct mountlist)); 299 if (mp == NULL) 300 return (0); 301 mp->ml_left = mp->ml_right = (struct mountlist *)0; 302 strp = mp->ml_host; 303 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 304 return (0); 305 strp = mp->ml_dirp; 306 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 307 return (0); 308 309 /* 310 * Build a binary tree on sorted order of either host or dirp. 311 * Drop any duplications. 312 */ 313 if (*mlp == NULL) { 314 *mlp = mp; 315 } else { 316 tp = *mlp; 317 while (tp) { 318 val = strcmp(mp->ml_host, tp->ml_host); 319 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 320 switch (type) { 321 case ALL: 322 if (val == 0) { 323 if (val2 == 0) { 324 free((caddr_t)mp); 325 goto next; 326 } 327 val = val2; 328 } 329 break; 330 case DIRS: 331 if (val2 == 0) { 332 free((caddr_t)mp); 333 goto next; 334 } 335 val = val2; 336 break; 337 default: 338 if (val == 0) { 339 free((caddr_t)mp); 340 goto next; 341 } 342 break; 343 }; 344 if (val < 0) { 345 otp = &tp->ml_left; 346 tp = tp->ml_left; 347 } else { 348 otp = &tp->ml_right; 349 tp = tp->ml_right; 350 } 351 } 352 *otp = mp; 353 } 354 next: 355 if (!xdr_bool(xdrsp, &bool)) 356 return (0); 357 } 358 return (1); 359 } 360 361 /* 362 * Xdr routine to retrieve exports list 363 */ 364 int 365 xdr_exports(xdrsp, exp) 366 XDR *xdrsp; 367 struct exportslist **exp; 368 { 369 register struct exportslist *ep; 370 register struct grouplist *gp; 371 int bool, grpbool; 372 char *strp; 373 374 *exp = (struct exportslist *)0; 375 if (!xdr_bool(xdrsp, &bool)) 376 return (0); 377 while (bool) { 378 ep = (struct exportslist *)malloc(sizeof(struct exportslist)); 379 if (ep == NULL) 380 return (0); 381 ep->ex_groups = (struct grouplist *)0; 382 strp = ep->ex_dirp; 383 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 384 return (0); 385 if (!xdr_bool(xdrsp, &grpbool)) 386 return (0); 387 while (grpbool) { 388 gp = (struct grouplist *)malloc(sizeof(struct grouplist)); 389 if (gp == NULL) 390 return (0); 391 strp = gp->gr_name; 392 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 393 return (0); 394 gp->gr_next = ep->ex_groups; 395 ep->ex_groups = gp; 396 if (!xdr_bool(xdrsp, &grpbool)) 397 return (0); 398 } 399 ep->ex_next = *exp; 400 *exp = ep; 401 if (!xdr_bool(xdrsp, &bool)) 402 return (0); 403 } 404 return (1); 405 } 406 407 static void 408 usage() 409 { 410 fprintf(stderr, "usage: showmount [-ade3] host\n"); 411 exit(1); 412 } 413 414 /* 415 * Print the binary tree in inorder so that output is sorted. 416 */ 417 void 418 print_dump(mp) 419 struct mountlist *mp; 420 { 421 422 if (mp == NULL) 423 return; 424 if (mp->ml_left) 425 print_dump(mp->ml_left); 426 switch (type) { 427 case ALL: 428 printf("%s:%s\n", mp->ml_host, mp->ml_dirp); 429 break; 430 case DIRS: 431 printf("%s\n", mp->ml_dirp); 432 break; 433 default: 434 printf("%s\n", mp->ml_host); 435 break; 436 }; 437 if (mp->ml_right) 438 print_dump(mp->ml_right); 439 } 440