1 /* $NetBSD: showmount.c,v 1.13 2004/08/06 16:10:54 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993, 1995 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 __COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1995\n\ 38 The Regents of the University of California. All rights reserved.\n"); 39 #endif /* not lint */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)showmount.c 8.3 (Berkeley) 3/29/95"; 44 #endif 45 __RCSID("$NetBSD: showmount.c,v 1.13 2004/08/06 16:10:54 mycroft Exp $"); 46 #endif /* not lint */ 47 48 #include <sys/types.h> 49 #include <sys/file.h> 50 #include <sys/socket.h> 51 52 #include <netdb.h> 53 #include <rpc/rpc.h> 54 #include <rpc/pmap_clnt.h> 55 #include <rpc/pmap_prot.h> 56 #include <nfs/rpcv2.h> 57 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 /* Constant defs */ 64 #define ALL 1 65 #define DIRS 2 66 67 #define DODUMP 0x1 68 #define DOEXPORTS 0x2 69 70 struct mountlist { 71 struct mountlist *ml_left; 72 struct mountlist *ml_right; 73 char ml_host[RPCMNT_NAMELEN+1]; 74 char ml_dirp[RPCMNT_PATHLEN+1]; 75 }; 76 77 struct grouplist { 78 struct grouplist *gr_next; 79 char gr_name[RPCMNT_NAMELEN+1]; 80 }; 81 82 struct exportslist { 83 struct exportslist *ex_next; 84 struct grouplist *ex_groups; 85 char ex_dirp[RPCMNT_PATHLEN+1]; 86 }; 87 88 static struct mountlist *mntdump; 89 static struct exportslist *exports; 90 static int type = 0; 91 92 int main __P((int, char **)); 93 void print_dump __P((struct mountlist *)); 94 void usage __P((void)); 95 int xdr_mntdump __P((XDR *, struct mountlist **)); 96 int xdr_exports __P((XDR *, struct exportslist **)); 97 int tcp_callrpc __P((char *host, 98 int prognum, int versnum, int procnum, 99 xdrproc_t inproc, char *in, 100 xdrproc_t outproc, char *out)); 101 102 /* 103 * This command queries the NFS mount daemon for it's mount list and/or 104 * it's exports list and prints them out. 105 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A" 106 * and the "Network File System Protocol XXX.." 107 * for detailed information on the protocol. 108 */ 109 int 110 main(argc, argv) 111 int argc; 112 char **argv; 113 { 114 struct exportslist *exp; 115 struct grouplist *grp; 116 int estat, rpcs = 0, mntvers = 1; 117 char *host; 118 int ch; 119 int len; 120 121 while ((ch = getopt(argc, argv, "ade3")) != -1) 122 switch((char)ch) { 123 case 'a': 124 if (type == 0) { 125 type = ALL; 126 rpcs |= DODUMP; 127 } else 128 usage(); 129 break; 130 case 'd': 131 if (type == 0) { 132 type = DIRS; 133 rpcs |= DODUMP; 134 } else 135 usage(); 136 break; 137 case 'e': 138 rpcs |= DOEXPORTS; 139 break; 140 case '3': 141 mntvers = 3; 142 break; 143 case '?': 144 default: 145 usage(); 146 } 147 argc -= optind; 148 argv += optind; 149 150 if (argc > 0) 151 host = *argv; 152 else 153 host = "localhost"; 154 155 if (rpcs == 0) 156 rpcs = DODUMP; 157 158 if (rpcs & DODUMP) 159 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers, 160 RPCMNT_DUMP, xdr_void, (char *)0, 161 xdr_mntdump, (char *)&mntdump)) != 0) { 162 fprintf(stderr, "showmount: Can't do Mountdump rpc: "); 163 clnt_perrno(estat); 164 exit(1); 165 } 166 if (rpcs & DOEXPORTS) 167 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers, 168 RPCMNT_EXPORT, xdr_void, (char *)0, 169 xdr_exports, (char *)&exports)) != 0) { 170 fprintf(stderr, "showmount: Can't do Exports rpc: "); 171 clnt_perrno(estat); 172 exit(1); 173 } 174 175 /* Now just print out the results */ 176 if (rpcs & DODUMP) { 177 switch (type) { 178 case ALL: 179 printf("All mount points on %s:\n", host); 180 break; 181 case DIRS: 182 printf("Directories on %s:\n", host); 183 break; 184 default: 185 printf("Hosts on %s:\n", host); 186 break; 187 }; 188 print_dump(mntdump); 189 } 190 if (rpcs & DOEXPORTS) { 191 printf("Exports list on %s:\n", host); 192 exp = exports; 193 while (exp) { 194 len = printf("%-35s", exp->ex_dirp); 195 if (len > 35) 196 printf("\t"); 197 grp = exp->ex_groups; 198 if (grp == NULL) { 199 printf("Everyone\n"); 200 } else { 201 while (grp) { 202 printf("%s ", grp->gr_name); 203 grp = grp->gr_next; 204 } 205 printf("\n"); 206 } 207 exp = exp->ex_next; 208 } 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 struct mountlist *mp, **otp, *tp; 288 int bool, val, val2; 289 char *strp; 290 291 otp = NULL; 292 *mlp = (struct mountlist *)0; 293 if (!xdr_bool(xdrsp, &bool)) 294 return (0); 295 while (bool) { 296 mp = (struct mountlist *)malloc(sizeof(struct mountlist)); 297 if (mp == NULL) 298 return (0); 299 mp->ml_left = mp->ml_right = (struct mountlist *)0; 300 strp = mp->ml_host; 301 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 302 return (0); 303 strp = mp->ml_dirp; 304 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 305 return (0); 306 307 /* 308 * Build a binary tree on sorted order of either host or dirp. 309 * Drop any duplications. 310 */ 311 if (*mlp == NULL) { 312 *mlp = mp; 313 } else { 314 tp = *mlp; 315 while (tp) { 316 val = strcmp(mp->ml_host, tp->ml_host); 317 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 318 switch (type) { 319 case ALL: 320 if (val == 0) { 321 if (val2 == 0) { 322 free((caddr_t)mp); 323 goto next; 324 } 325 val = val2; 326 } 327 break; 328 case DIRS: 329 if (val2 == 0) { 330 free((caddr_t)mp); 331 goto next; 332 } 333 val = val2; 334 break; 335 default: 336 if (val == 0) { 337 free((caddr_t)mp); 338 goto next; 339 } 340 break; 341 }; 342 if (val < 0) { 343 otp = &tp->ml_left; 344 tp = tp->ml_left; 345 } else { 346 otp = &tp->ml_right; 347 tp = tp->ml_right; 348 } 349 } 350 *otp = mp; 351 } 352 next: 353 if (!xdr_bool(xdrsp, &bool)) 354 return (0); 355 } 356 return (1); 357 } 358 359 /* 360 * Xdr routine to retrieve exports list 361 */ 362 int 363 xdr_exports(xdrsp, exp) 364 XDR *xdrsp; 365 struct exportslist **exp; 366 { 367 struct exportslist *ep; 368 struct grouplist *gp; 369 int bool, grpbool; 370 char *strp; 371 372 *exp = (struct exportslist *)0; 373 if (!xdr_bool(xdrsp, &bool)) 374 return (0); 375 while (bool) { 376 ep = (struct exportslist *)malloc(sizeof(struct exportslist)); 377 if (ep == NULL) 378 return (0); 379 ep->ex_groups = (struct grouplist *)0; 380 strp = ep->ex_dirp; 381 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 382 return (0); 383 if (!xdr_bool(xdrsp, &grpbool)) 384 return (0); 385 while (grpbool) { 386 gp = (struct grouplist *)malloc(sizeof(struct grouplist)); 387 if (gp == NULL) 388 return (0); 389 strp = gp->gr_name; 390 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 391 return (0); 392 gp->gr_next = ep->ex_groups; 393 ep->ex_groups = gp; 394 if (!xdr_bool(xdrsp, &grpbool)) 395 return (0); 396 } 397 ep->ex_next = *exp; 398 *exp = ep; 399 if (!xdr_bool(xdrsp, &bool)) 400 return (0); 401 } 402 return (1); 403 } 404 405 void 406 usage() 407 { 408 409 fprintf(stderr, "usage: showmount [-ade3] host\n"); 410 exit(1); 411 } 412 413 /* 414 * Print the binary tree in inorder so that output is sorted. 415 */ 416 void 417 print_dump(mp) 418 struct mountlist *mp; 419 { 420 421 if (mp == NULL) 422 return; 423 if (mp->ml_left) 424 print_dump(mp->ml_left); 425 switch (type) { 426 case ALL: 427 printf("%s:%s\n", mp->ml_host, mp->ml_dirp); 428 break; 429 case DIRS: 430 printf("%s\n", mp->ml_dirp); 431 break; 432 default: 433 printf("%s\n", mp->ml_host); 434 break; 435 }; 436 if (mp->ml_right) 437 print_dump(mp->ml_right); 438 } 439