1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 #ifndef lint 36 static const char copyright[] = 37 "@(#) 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 static const char rcsid[] = 46 "$FreeBSD$"; 47 #endif /* not lint */ 48 49 #include <sys/types.h> 50 #include <sys/queue.h> 51 #include <sys/file.h> 52 #include <sys/socket.h> 53 #include <sys/socketvar.h> 54 55 #include <err.h> 56 #include <getopt.h> 57 #include <netdb.h> 58 #include <rpc/rpc.h> 59 #include <rpc/pmap_clnt.h> 60 #include <rpc/pmap_prot.h> 61 #include <rpcsvc/mount.h> 62 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <unistd.h> 67 #include <vis.h> 68 69 /* Constant defs */ 70 #define ALL 1 71 #define DIRS 2 72 73 #define DODUMP 0x1 74 #define DOEXPORTS 0x2 75 #define DOPARSABLEEXPORTS 0x4 76 77 struct mountlist { 78 struct mountlist *ml_left; 79 struct mountlist *ml_right; 80 char ml_host[MNTNAMLEN+1]; 81 char ml_dirp[MNTPATHLEN+1]; 82 }; 83 84 struct grouplist { 85 struct grouplist *gr_next; 86 char gr_name[MNTNAMLEN+1]; 87 }; 88 89 struct exportslist { 90 struct exportslist *ex_next; 91 struct grouplist *ex_groups; 92 char ex_dirp[MNTPATHLEN+1]; 93 }; 94 95 static struct mountlist *mntdump; 96 static struct exportslist *exportslist; 97 static int type = 0; 98 99 void print_dump(struct mountlist *); 100 static void usage(void); 101 int xdr_mntdump(XDR *, struct mountlist **); 102 int xdr_exportslist(XDR *, struct exportslist **); 103 int tcp_callrpc(const char *host, int prognum, int versnum, int procnum, 104 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out); 105 106 static const struct option long_opts[] = { 107 { "all", no_argument, NULL, 'a' }, 108 { "directories", no_argument, NULL, 'd' }, 109 { "exports-script", no_argument, NULL, 'E' }, 110 { "exports", no_argument, NULL, 'e' }, 111 { NULL, 0, NULL, 0 }, 112 }; 113 114 /* 115 * This command queries the NFS mount daemon for it's mount list and/or 116 * it's exports list and prints them out. 117 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A" 118 * and the "Network File System Protocol XXX.." 119 * for detailed information on the protocol. 120 */ 121 int 122 main(int argc, char **argv) 123 { 124 char strvised[MNTPATHLEN * 4 + 1]; 125 register struct exportslist *exp; 126 register struct grouplist *grp; 127 register int rpcs = 0, mntvers = 3; 128 const char *host; 129 int ch, estat, nbytes; 130 131 while ((ch = getopt_long(argc, argv, "+adEe13", long_opts, NULL)) != -1) 132 switch (ch) { 133 case 'a': 134 if (type == 0) { 135 type = ALL; 136 rpcs |= DODUMP; 137 } else 138 usage(); 139 break; 140 case 'd': 141 if (type == 0) { 142 type = DIRS; 143 rpcs |= DODUMP; 144 } else 145 usage(); 146 break; 147 case 'E': 148 rpcs |= DOPARSABLEEXPORTS; 149 break; 150 case 'e': 151 rpcs |= DOEXPORTS; 152 break; 153 case '1': 154 mntvers = 1; 155 break; 156 case '3': 157 mntvers = 3; 158 break; 159 case '?': 160 default: 161 usage(); 162 } 163 argc -= optind; 164 argv += optind; 165 166 if ((rpcs & DOPARSABLEEXPORTS) != 0) { 167 if ((rpcs & DOEXPORTS) != 0) 168 errx(1, "-E cannot be used with -e"); 169 if ((rpcs & DODUMP) != 0) 170 errx(1, "-E cannot be used with -a or -d"); 171 } 172 173 if (argc > 0) 174 host = *argv; 175 else 176 host = "localhost"; 177 178 if (rpcs == 0) 179 rpcs = DODUMP; 180 181 if (rpcs & DODUMP) 182 if ((estat = tcp_callrpc(host, MOUNTPROG, mntvers, 183 MOUNTPROC_DUMP, (xdrproc_t)xdr_void, (char *)0, 184 (xdrproc_t)xdr_mntdump, (char *)&mntdump)) != 0) { 185 clnt_perrno(estat); 186 errx(1, "can't do mountdump rpc"); 187 } 188 if (rpcs & (DOEXPORTS | DOPARSABLEEXPORTS)) 189 if ((estat = tcp_callrpc(host, MOUNTPROG, mntvers, 190 MOUNTPROC_EXPORT, (xdrproc_t)xdr_void, (char *)0, 191 (xdrproc_t)xdr_exportslist, (char *)&exportslist)) != 0) { 192 clnt_perrno(estat); 193 errx(1, "can't do exports rpc"); 194 } 195 196 /* Now just print out the results */ 197 if (rpcs & DODUMP) { 198 switch (type) { 199 case ALL: 200 printf("All mount points on %s:\n", host); 201 break; 202 case DIRS: 203 printf("Directories on %s:\n", host); 204 break; 205 default: 206 printf("Hosts on %s:\n", host); 207 break; 208 } 209 print_dump(mntdump); 210 } 211 if (rpcs & DOEXPORTS) { 212 printf("Exports list on %s:\n", host); 213 exp = exportslist; 214 while (exp) { 215 printf("%-34s ", exp->ex_dirp); 216 grp = exp->ex_groups; 217 if (grp == NULL) { 218 printf("Everyone\n"); 219 } else { 220 while (grp) { 221 printf("%s ", grp->gr_name); 222 grp = grp->gr_next; 223 } 224 printf("\n"); 225 } 226 exp = exp->ex_next; 227 } 228 } 229 if (rpcs & DOPARSABLEEXPORTS) { 230 exp = exportslist; 231 while (exp) { 232 nbytes = strsnvis(strvised, sizeof(strvised), 233 exp->ex_dirp, VIS_GLOB | VIS_NL, "\"'$"); 234 if (nbytes == -1) 235 err(1, "strsnvis"); 236 printf("%s\n", strvised); 237 exp = exp->ex_next; 238 } 239 } 240 exit(0); 241 } 242 243 /* 244 * tcp_callrpc has the same interface as callrpc, but tries to 245 * use tcp as transport method in order to handle large replies. 246 */ 247 int 248 tcp_callrpc(const char *host, int prognum, int versnum, int procnum, 249 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out) 250 { 251 CLIENT *client; 252 struct timeval timeout; 253 int rval; 254 255 if ((client = clnt_create(host, prognum, versnum, "tcp")) == NULL && 256 (client = clnt_create(host, prognum, versnum, "udp")) == NULL) 257 return ((int) rpc_createerr.cf_stat); 258 259 timeout.tv_sec = 25; 260 timeout.tv_usec = 0; 261 rval = (int) clnt_call(client, procnum, 262 inproc, in, 263 outproc, out, 264 timeout); 265 clnt_destroy(client); 266 return rval; 267 } 268 269 /* 270 * Xdr routine for retrieving the mount dump list 271 */ 272 int 273 xdr_mntdump(XDR *xdrsp, struct mountlist **mlp) 274 { 275 register struct mountlist *mp; 276 register struct mountlist *tp; 277 register struct mountlist **otp; 278 int val, val2; 279 int bool; 280 char *strp; 281 282 *mlp = (struct mountlist *)0; 283 if (!xdr_bool(xdrsp, &bool)) 284 return (0); 285 while (bool) { 286 mp = (struct mountlist *)malloc(sizeof(struct mountlist)); 287 if (mp == NULL) 288 return (0); 289 mp->ml_left = mp->ml_right = (struct mountlist *)0; 290 strp = mp->ml_host; 291 if (!xdr_string(xdrsp, &strp, MNTNAMLEN)) { 292 free(mp); 293 return (0); 294 } 295 strp = mp->ml_dirp; 296 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) { 297 free(mp); 298 return (0); 299 } 300 301 /* 302 * Build a binary tree on sorted order of either host or dirp. 303 * Drop any duplications. 304 */ 305 if (*mlp == NULL) { 306 *mlp = mp; 307 } else { 308 tp = *mlp; 309 while (tp) { 310 val = strcmp(mp->ml_host, tp->ml_host); 311 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 312 switch (type) { 313 case ALL: 314 if (val == 0) { 315 if (val2 == 0) { 316 free((caddr_t)mp); 317 goto next; 318 } 319 val = val2; 320 } 321 break; 322 case DIRS: 323 if (val2 == 0) { 324 free((caddr_t)mp); 325 goto next; 326 } 327 val = val2; 328 break; 329 default: 330 if (val == 0) { 331 free((caddr_t)mp); 332 goto next; 333 } 334 break; 335 } 336 if (val < 0) { 337 otp = &tp->ml_left; 338 tp = tp->ml_left; 339 } else { 340 otp = &tp->ml_right; 341 tp = tp->ml_right; 342 } 343 } 344 *otp = mp; 345 } 346 next: 347 if (!xdr_bool(xdrsp, &bool)) 348 return (0); 349 } 350 return (1); 351 } 352 353 /* 354 * Xdr routine to retrieve exports list 355 */ 356 int 357 xdr_exportslist(XDR *xdrsp, struct exportslist **exp) 358 { 359 register struct exportslist *ep; 360 register struct grouplist *gp; 361 int bool, grpbool; 362 char *strp; 363 364 *exp = (struct exportslist *)0; 365 if (!xdr_bool(xdrsp, &bool)) 366 return (0); 367 while (bool) { 368 ep = (struct exportslist *)malloc(sizeof(struct exportslist)); 369 if (ep == NULL) 370 return (0); 371 ep->ex_groups = (struct grouplist *)0; 372 strp = ep->ex_dirp; 373 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 374 return (0); 375 if (!xdr_bool(xdrsp, &grpbool)) 376 return (0); 377 while (grpbool) { 378 gp = (struct grouplist *)malloc(sizeof(struct grouplist)); 379 if (gp == NULL) 380 return (0); 381 strp = gp->gr_name; 382 if (!xdr_string(xdrsp, &strp, MNTNAMLEN)) 383 return (0); 384 gp->gr_next = ep->ex_groups; 385 ep->ex_groups = gp; 386 if (!xdr_bool(xdrsp, &grpbool)) 387 return (0); 388 } 389 ep->ex_next = *exp; 390 *exp = ep; 391 if (!xdr_bool(xdrsp, &bool)) 392 return (0); 393 } 394 return (1); 395 } 396 397 static void 398 usage(void) 399 { 400 fprintf(stderr, "usage: showmount [-a | -d] [-e3] [host]\n"); 401 exit(1); 402 } 403 404 /* 405 * Print the binary tree in inorder so that output is sorted. 406 */ 407 void 408 print_dump(struct mountlist *mp) 409 { 410 411 if (mp == NULL) 412 return; 413 if (mp->ml_left) 414 print_dump(mp->ml_left); 415 switch (type) { 416 case ALL: 417 printf("%s:%s\n", mp->ml_host, mp->ml_dirp); 418 break; 419 case DIRS: 420 printf("%s\n", mp->ml_dirp); 421 break; 422 default: 423 printf("%s\n", mp->ml_host); 424 break; 425 } 426 if (mp->ml_right) 427 print_dump(mp->ml_right); 428 } 429