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 "$FreeBSD$"; 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(struct mountlist *); 99 static void usage(void); 100 int xdr_mntdump(XDR *, struct mountlist **); 101 int xdr_exports(XDR *, struct exportslist **); 102 int tcp_callrpc(const char *host, int prognum, int versnum, int procnum, 103 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out); 104 105 /* 106 * This command queries the NFS mount daemon for it's mount list and/or 107 * it's exports list and prints them out. 108 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A" 109 * and the "Network File System Protocol XXX.." 110 * for detailed information on the protocol. 111 */ 112 int 113 main(argc, argv) 114 int argc; 115 char **argv; 116 { 117 register struct exportslist *exp; 118 register struct grouplist *grp; 119 register int rpcs = 0, mntvers = 1; 120 const char *host; 121 int ch, estat; 122 123 while ((ch = getopt(argc, argv, "ade3")) != -1) 124 switch (ch) { 125 case 'a': 126 if (type == 0) { 127 type = ALL; 128 rpcs |= DODUMP; 129 } else 130 usage(); 131 break; 132 case 'd': 133 if (type == 0) { 134 type = DIRS; 135 rpcs |= DODUMP; 136 } else 137 usage(); 138 break; 139 case 'e': 140 rpcs |= DOEXPORTS; 141 break; 142 case '3': 143 mntvers = 3; 144 break; 145 case '?': 146 default: 147 usage(); 148 } 149 argc -= optind; 150 argv += optind; 151 152 if (argc > 0) 153 host = *argv; 154 else 155 host = "localhost"; 156 157 if (rpcs == 0) 158 rpcs = DODUMP; 159 160 if (rpcs & DODUMP) 161 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers, 162 RPCMNT_DUMP, (xdrproc_t)xdr_void, (char *)0, 163 (xdrproc_t)xdr_mntdump, (char *)&mntdump)) != 0) { 164 clnt_perrno(estat); 165 errx(1, "can't do mountdump rpc"); 166 } 167 if (rpcs & DOEXPORTS) 168 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers, 169 RPCMNT_EXPORT, (xdrproc_t)xdr_void, (char *)0, 170 (xdrproc_t)xdr_exports, (char *)&exports)) != 0) { 171 clnt_perrno(estat); 172 errx(1, "can't do exports rpc"); 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 printf("%-35s", exp->ex_dirp); 195 grp = exp->ex_groups; 196 if (grp == NULL) { 197 printf("Everyone\n"); 198 } else { 199 while (grp) { 200 printf("%s ", grp->gr_name); 201 grp = grp->gr_next; 202 } 203 printf("\n"); 204 } 205 exp = exp->ex_next; 206 } 207 } 208 exit(0); 209 } 210 211 /* 212 * tcp_callrpc has the same interface as callrpc, but tries to 213 * use tcp as transport method in order to handle large replies. 214 */ 215 int 216 tcp_callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out) 217 const char *host; 218 int prognum; 219 int versnum; 220 int procnum; 221 xdrproc_t inproc; 222 char *in; 223 xdrproc_t outproc; 224 char *out; 225 { 226 CLIENT *client; 227 struct timeval timeout; 228 int rval; 229 230 if ((client = clnt_create(host, prognum, versnum, "tcp")) == NULL && 231 (client = clnt_create(host, prognum, versnum, "udp")) == NULL) 232 return ((int) rpc_createerr.cf_stat); 233 234 timeout.tv_sec = 25; 235 timeout.tv_usec = 0; 236 rval = (int) clnt_call(client, procnum, 237 inproc, in, 238 outproc, out, 239 timeout); 240 clnt_destroy(client); 241 return rval; 242 } 243 244 /* 245 * Xdr routine for retrieving the mount dump list 246 */ 247 int 248 xdr_mntdump(xdrsp, mlp) 249 XDR *xdrsp; 250 struct mountlist **mlp; 251 { 252 register struct mountlist *mp; 253 register struct mountlist *tp; 254 register struct mountlist **otp; 255 int val, val2; 256 int bool; 257 char *strp; 258 259 *mlp = (struct mountlist *)0; 260 if (!xdr_bool(xdrsp, &bool)) 261 return (0); 262 while (bool) { 263 mp = (struct mountlist *)malloc(sizeof(struct mountlist)); 264 if (mp == NULL) 265 return (0); 266 mp->ml_left = mp->ml_right = (struct mountlist *)0; 267 strp = mp->ml_host; 268 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 269 return (0); 270 strp = mp->ml_dirp; 271 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 272 return (0); 273 274 /* 275 * Build a binary tree on sorted order of either host or dirp. 276 * Drop any duplications. 277 */ 278 if (*mlp == NULL) { 279 *mlp = mp; 280 } else { 281 tp = *mlp; 282 while (tp) { 283 val = strcmp(mp->ml_host, tp->ml_host); 284 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 285 switch (type) { 286 case ALL: 287 if (val == 0) { 288 if (val2 == 0) { 289 free((caddr_t)mp); 290 goto next; 291 } 292 val = val2; 293 } 294 break; 295 case DIRS: 296 if (val2 == 0) { 297 free((caddr_t)mp); 298 goto next; 299 } 300 val = val2; 301 break; 302 default: 303 if (val == 0) { 304 free((caddr_t)mp); 305 goto next; 306 } 307 break; 308 }; 309 if (val < 0) { 310 otp = &tp->ml_left; 311 tp = tp->ml_left; 312 } else { 313 otp = &tp->ml_right; 314 tp = tp->ml_right; 315 } 316 } 317 *otp = mp; 318 } 319 next: 320 if (!xdr_bool(xdrsp, &bool)) 321 return (0); 322 } 323 return (1); 324 } 325 326 /* 327 * Xdr routine to retrieve exports list 328 */ 329 int 330 xdr_exports(xdrsp, exp) 331 XDR *xdrsp; 332 struct exportslist **exp; 333 { 334 register struct exportslist *ep; 335 register struct grouplist *gp; 336 int bool, grpbool; 337 char *strp; 338 339 *exp = (struct exportslist *)0; 340 if (!xdr_bool(xdrsp, &bool)) 341 return (0); 342 while (bool) { 343 ep = (struct exportslist *)malloc(sizeof(struct exportslist)); 344 if (ep == NULL) 345 return (0); 346 ep->ex_groups = (struct grouplist *)0; 347 strp = ep->ex_dirp; 348 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 349 return (0); 350 if (!xdr_bool(xdrsp, &grpbool)) 351 return (0); 352 while (grpbool) { 353 gp = (struct grouplist *)malloc(sizeof(struct grouplist)); 354 if (gp == NULL) 355 return (0); 356 strp = gp->gr_name; 357 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 358 return (0); 359 gp->gr_next = ep->ex_groups; 360 ep->ex_groups = gp; 361 if (!xdr_bool(xdrsp, &grpbool)) 362 return (0); 363 } 364 ep->ex_next = *exp; 365 *exp = ep; 366 if (!xdr_bool(xdrsp, &bool)) 367 return (0); 368 } 369 return (1); 370 } 371 372 static void 373 usage() 374 { 375 fprintf(stderr, "usage: showmount [-a | -d] [-e3] [host]\n"); 376 exit(1); 377 } 378 379 /* 380 * Print the binary tree in inorder so that output is sorted. 381 */ 382 void 383 print_dump(mp) 384 struct mountlist *mp; 385 { 386 387 if (mp == NULL) 388 return; 389 if (mp->ml_left) 390 print_dump(mp->ml_left); 391 switch (type) { 392 case ALL: 393 printf("%s:%s\n", mp->ml_host, mp->ml_dirp); 394 break; 395 case DIRS: 396 printf("%s\n", mp->ml_dirp); 397 break; 398 default: 399 printf("%s\n", mp->ml_host); 400 break; 401 }; 402 if (mp->ml_right) 403 print_dump(mp->ml_right); 404 } 405