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 char ch; 121 const char *host; 122 int estat; 123 124 while ((ch = getopt(argc, argv, "ade3")) != -1) 125 switch((char)ch) { 126 case 'a': 127 if (type == 0) { 128 type = ALL; 129 rpcs |= DODUMP; 130 } else 131 usage(); 132 break; 133 case 'd': 134 if (type == 0) { 135 type = DIRS; 136 rpcs |= DODUMP; 137 } else 138 usage(); 139 break; 140 case 'e': 141 rpcs |= DOEXPORTS; 142 break; 143 case '3': 144 mntvers = 3; 145 break; 146 case '?': 147 default: 148 usage(); 149 } 150 argc -= optind; 151 argv += optind; 152 153 if (argc > 0) 154 host = *argv; 155 else 156 host = "localhost"; 157 158 if (rpcs == 0) 159 rpcs = DODUMP; 160 161 if (rpcs & DODUMP) 162 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers, 163 RPCMNT_DUMP, xdr_void, (char *)0, 164 xdr_mntdump, (char *)&mntdump)) != 0) { 165 clnt_perrno(estat); 166 errx(1, "can't do mountdump rpc"); 167 } 168 if (rpcs & DOEXPORTS) 169 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers, 170 RPCMNT_EXPORT, xdr_void, (char *)0, 171 xdr_exports, (char *)&exports)) != 0) { 172 clnt_perrno(estat); 173 errx(1, "can't do exports rpc"); 174 } 175 176 /* Now just print out the results */ 177 if (rpcs & DODUMP) { 178 switch (type) { 179 case ALL: 180 printf("All mount points on %s:\n", host); 181 break; 182 case DIRS: 183 printf("Directories on %s:\n", host); 184 break; 185 default: 186 printf("Hosts on %s:\n", host); 187 break; 188 }; 189 print_dump(mntdump); 190 } 191 if (rpcs & DOEXPORTS) { 192 printf("Exports list on %s:\n", host); 193 exp = exports; 194 while (exp) { 195 printf("%-35s", exp->ex_dirp); 196 grp = exp->ex_groups; 197 if (grp == NULL) { 198 printf("Everyone\n"); 199 } else { 200 while (grp) { 201 printf("%s ", grp->gr_name); 202 grp = grp->gr_next; 203 } 204 printf("\n"); 205 } 206 exp = exp->ex_next; 207 } 208 } 209 exit(0); 210 } 211 212 /* 213 * tcp_callrpc has the same interface as callrpc, but tries to 214 * use tcp as transport method in order to handle large replies. 215 */ 216 int 217 tcp_callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out) 218 const char *host; 219 int prognum; 220 int versnum; 221 int procnum; 222 xdrproc_t inproc; 223 char *in; 224 xdrproc_t outproc; 225 char *out; 226 { 227 CLIENT *client; 228 struct timeval timeout; 229 int rval; 230 231 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); 234 235 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; 243 } 244 245 /* 246 * Xdr routine for retrieving the mount dump list 247 */ 248 int 249 xdr_mntdump(xdrsp, mlp) 250 XDR *xdrsp; 251 struct mountlist **mlp; 252 { 253 register struct mountlist *mp; 254 register struct mountlist *tp; 255 register struct mountlist **otp; 256 int val, val2; 257 int bool; 258 char *strp; 259 260 *mlp = (struct mountlist *)0; 261 if (!xdr_bool(xdrsp, &bool)) 262 return (0); 263 while (bool) { 264 mp = (struct mountlist *)malloc(sizeof(struct mountlist)); 265 if (mp == NULL) 266 return (0); 267 mp->ml_left = mp->ml_right = (struct mountlist *)0; 268 strp = mp->ml_host; 269 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 270 return (0); 271 strp = mp->ml_dirp; 272 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 273 return (0); 274 275 /* 276 * Build a binary tree on sorted order of either host or dirp. 277 * Drop any duplications. 278 */ 279 if (*mlp == NULL) { 280 *mlp = mp; 281 } else { 282 tp = *mlp; 283 while (tp) { 284 val = strcmp(mp->ml_host, tp->ml_host); 285 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 286 switch (type) { 287 case ALL: 288 if (val == 0) { 289 if (val2 == 0) { 290 free((caddr_t)mp); 291 goto next; 292 } 293 val = val2; 294 } 295 break; 296 case DIRS: 297 if (val2 == 0) { 298 free((caddr_t)mp); 299 goto next; 300 } 301 val = val2; 302 break; 303 default: 304 if (val == 0) { 305 free((caddr_t)mp); 306 goto next; 307 } 308 break; 309 }; 310 if (val < 0) { 311 otp = &tp->ml_left; 312 tp = tp->ml_left; 313 } else { 314 otp = &tp->ml_right; 315 tp = tp->ml_right; 316 } 317 } 318 *otp = mp; 319 } 320 next: 321 if (!xdr_bool(xdrsp, &bool)) 322 return (0); 323 } 324 return (1); 325 } 326 327 /* 328 * Xdr routine to retrieve exports list 329 */ 330 int 331 xdr_exports(xdrsp, exp) 332 XDR *xdrsp; 333 struct exportslist **exp; 334 { 335 register struct exportslist *ep; 336 register struct grouplist *gp; 337 int bool, grpbool; 338 char *strp; 339 340 *exp = (struct exportslist *)0; 341 if (!xdr_bool(xdrsp, &bool)) 342 return (0); 343 while (bool) { 344 ep = (struct exportslist *)malloc(sizeof(struct exportslist)); 345 if (ep == NULL) 346 return (0); 347 ep->ex_groups = (struct grouplist *)0; 348 strp = ep->ex_dirp; 349 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 350 return (0); 351 if (!xdr_bool(xdrsp, &grpbool)) 352 return (0); 353 while (grpbool) { 354 gp = (struct grouplist *)malloc(sizeof(struct grouplist)); 355 if (gp == NULL) 356 return (0); 357 strp = gp->gr_name; 358 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 359 return (0); 360 gp->gr_next = ep->ex_groups; 361 ep->ex_groups = gp; 362 if (!xdr_bool(xdrsp, &grpbool)) 363 return (0); 364 } 365 ep->ex_next = *exp; 366 *exp = ep; 367 if (!xdr_bool(xdrsp, &bool)) 368 return (0); 369 } 370 return (1); 371 } 372 373 static void 374 usage() 375 { 376 fprintf(stderr, "usage: showmount [-ade3] host\n"); 377 exit(1); 378 } 379 380 /* 381 * Print the binary tree in inorder so that output is sorted. 382 */ 383 void 384 print_dump(mp) 385 struct mountlist *mp; 386 { 387 388 if (mp == NULL) 389 return; 390 if (mp->ml_left) 391 print_dump(mp->ml_left); 392 switch (type) { 393 case ALL: 394 printf("%s:%s\n", mp->ml_host, mp->ml_dirp); 395 break; 396 case DIRS: 397 printf("%s\n", mp->ml_dirp); 398 break; 399 default: 400 printf("%s\n", mp->ml_host); 401 break; 402 }; 403 if (mp->ml_right) 404 print_dump(mp->ml_right); 405 } 406