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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1989, 1993, 1995\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #ifndef lint 40 #if 0 41 static char sccsid[] = "@(#)showmount.c 8.3 (Berkeley) 3/29/95"; 42 #endif 43 static const char rcsid[] = 44 "$FreeBSD$"; 45 #endif /* not lint */ 46 47 #include <sys/types.h> 48 #include <sys/queue.h> 49 #include <sys/file.h> 50 #include <sys/socket.h> 51 #include <sys/socketvar.h> 52 53 #include <err.h> 54 #include <netdb.h> 55 #include <rpc/rpc.h> 56 #include <rpc/pmap_clnt.h> 57 #include <rpc/pmap_prot.h> 58 #include <rpcsvc/mount.h> 59 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 #include <vis.h> 65 66 /* Constant defs */ 67 #define ALL 1 68 #define DIRS 2 69 70 #define DODUMP 0x1 71 #define DOEXPORTS 0x2 72 #define DOPARSABLEEXPORTS 0x4 73 74 struct mountlist { 75 struct mountlist *ml_left; 76 struct mountlist *ml_right; 77 char ml_host[MNTNAMLEN+1]; 78 char ml_dirp[MNTPATHLEN+1]; 79 }; 80 81 struct grouplist { 82 struct grouplist *gr_next; 83 char gr_name[MNTNAMLEN+1]; 84 }; 85 86 struct exportslist { 87 struct exportslist *ex_next; 88 struct grouplist *ex_groups; 89 char ex_dirp[MNTPATHLEN+1]; 90 }; 91 92 static struct mountlist *mntdump; 93 static struct exportslist *exportslist; 94 static int type = 0; 95 96 void print_dump(struct mountlist *); 97 static void usage(void); 98 int xdr_mntdump(XDR *, struct mountlist **); 99 int xdr_exportslist(XDR *, struct exportslist **); 100 int tcp_callrpc(const char *host, int prognum, int versnum, int procnum, 101 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out); 102 103 /* 104 * This command queries the NFS mount daemon for it's mount list and/or 105 * it's exports list and prints them out. 106 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A" 107 * and the "Network File System Protocol XXX.." 108 * for detailed information on the protocol. 109 */ 110 int 111 main(int argc, char **argv) 112 { 113 char strvised[MNTPATHLEN * 4 + 1]; 114 register struct exportslist *exp; 115 register struct grouplist *grp; 116 register int rpcs = 0, mntvers = 3; 117 const char *host; 118 int ch, estat, nbytes; 119 120 while ((ch = getopt(argc, argv, "adEe13")) != -1) 121 switch (ch) { 122 case 'a': 123 if (type == 0) { 124 type = ALL; 125 rpcs |= DODUMP; 126 } else 127 usage(); 128 break; 129 case 'd': 130 if (type == 0) { 131 type = DIRS; 132 rpcs |= DODUMP; 133 } else 134 usage(); 135 break; 136 case 'E': 137 rpcs |= DOPARSABLEEXPORTS; 138 break; 139 case 'e': 140 rpcs |= DOEXPORTS; 141 break; 142 case '1': 143 mntvers = 1; 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 ((rpcs & DOPARSABLEEXPORTS) != 0) { 156 if ((rpcs & DOEXPORTS) != 0) 157 errx(1, "-E cannot be used with -e"); 158 if ((rpcs & DODUMP) != 0) 159 errx(1, "-E cannot be used with -a or -d"); 160 } 161 162 if (argc > 0) 163 host = *argv; 164 else 165 host = "localhost"; 166 167 if (rpcs == 0) 168 rpcs = DODUMP; 169 170 if (rpcs & DODUMP) 171 if ((estat = tcp_callrpc(host, MOUNTPROG, mntvers, 172 MOUNTPROC_DUMP, (xdrproc_t)xdr_void, (char *)0, 173 (xdrproc_t)xdr_mntdump, (char *)&mntdump)) != 0) { 174 clnt_perrno(estat); 175 errx(1, "can't do mountdump rpc"); 176 } 177 if (rpcs & (DOEXPORTS | DOPARSABLEEXPORTS)) 178 if ((estat = tcp_callrpc(host, MOUNTPROG, mntvers, 179 MOUNTPROC_EXPORT, (xdrproc_t)xdr_void, (char *)0, 180 (xdrproc_t)xdr_exportslist, (char *)&exportslist)) != 0) { 181 clnt_perrno(estat); 182 errx(1, "can't do exports rpc"); 183 } 184 185 /* Now just print out the results */ 186 if (rpcs & DODUMP) { 187 switch (type) { 188 case ALL: 189 printf("All mount points on %s:\n", host); 190 break; 191 case DIRS: 192 printf("Directories on %s:\n", host); 193 break; 194 default: 195 printf("Hosts on %s:\n", host); 196 break; 197 } 198 print_dump(mntdump); 199 } 200 if (rpcs & DOEXPORTS) { 201 printf("Exports list on %s:\n", host); 202 exp = exportslist; 203 while (exp) { 204 printf("%-34s ", exp->ex_dirp); 205 grp = exp->ex_groups; 206 if (grp == NULL) { 207 printf("Everyone\n"); 208 } else { 209 while (grp) { 210 printf("%s ", grp->gr_name); 211 grp = grp->gr_next; 212 } 213 printf("\n"); 214 } 215 exp = exp->ex_next; 216 } 217 } 218 if (rpcs & DOPARSABLEEXPORTS) { 219 exp = exportslist; 220 while (exp) { 221 nbytes = strsnvis(strvised, sizeof(strvised), 222 exp->ex_dirp, VIS_GLOB | VIS_NL, "\"'$"); 223 if (nbytes == -1) 224 err(1, "strsnvis"); 225 printf("%s\n", strvised); 226 exp = exp->ex_next; 227 } 228 } 229 exit(0); 230 } 231 232 /* 233 * tcp_callrpc has the same interface as callrpc, but tries to 234 * use tcp as transport method in order to handle large replies. 235 */ 236 int 237 tcp_callrpc(const char *host, int prognum, int versnum, int procnum, 238 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out) 239 { 240 CLIENT *client; 241 struct timeval timeout; 242 int rval; 243 244 if ((client = clnt_create(host, prognum, versnum, "tcp")) == NULL && 245 (client = clnt_create(host, prognum, versnum, "udp")) == NULL) 246 return ((int) rpc_createerr.cf_stat); 247 248 timeout.tv_sec = 25; 249 timeout.tv_usec = 0; 250 rval = (int) clnt_call(client, procnum, 251 inproc, in, 252 outproc, out, 253 timeout); 254 clnt_destroy(client); 255 return rval; 256 } 257 258 /* 259 * Xdr routine for retrieving the mount dump list 260 */ 261 int 262 xdr_mntdump(XDR *xdrsp, struct mountlist **mlp) 263 { 264 register struct mountlist *mp; 265 register struct mountlist *tp; 266 register struct mountlist **otp; 267 int val, val2; 268 int bool; 269 char *strp; 270 271 *mlp = (struct mountlist *)0; 272 if (!xdr_bool(xdrsp, &bool)) 273 return (0); 274 while (bool) { 275 mp = (struct mountlist *)malloc(sizeof(struct mountlist)); 276 if (mp == NULL) 277 return (0); 278 mp->ml_left = mp->ml_right = (struct mountlist *)0; 279 strp = mp->ml_host; 280 if (!xdr_string(xdrsp, &strp, MNTNAMLEN)) 281 return (0); 282 strp = mp->ml_dirp; 283 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 284 return (0); 285 286 /* 287 * Build a binary tree on sorted order of either host or dirp. 288 * Drop any duplications. 289 */ 290 if (*mlp == NULL) { 291 *mlp = mp; 292 } else { 293 tp = *mlp; 294 while (tp) { 295 val = strcmp(mp->ml_host, tp->ml_host); 296 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 297 switch (type) { 298 case ALL: 299 if (val == 0) { 300 if (val2 == 0) { 301 free((caddr_t)mp); 302 goto next; 303 } 304 val = val2; 305 } 306 break; 307 case DIRS: 308 if (val2 == 0) { 309 free((caddr_t)mp); 310 goto next; 311 } 312 val = val2; 313 break; 314 default: 315 if (val == 0) { 316 free((caddr_t)mp); 317 goto next; 318 } 319 break; 320 } 321 if (val < 0) { 322 otp = &tp->ml_left; 323 tp = tp->ml_left; 324 } else { 325 otp = &tp->ml_right; 326 tp = tp->ml_right; 327 } 328 } 329 *otp = mp; 330 } 331 next: 332 if (!xdr_bool(xdrsp, &bool)) 333 return (0); 334 } 335 return (1); 336 } 337 338 /* 339 * Xdr routine to retrieve exports list 340 */ 341 int 342 xdr_exportslist(XDR *xdrsp, struct exportslist **exp) 343 { 344 register struct exportslist *ep; 345 register struct grouplist *gp; 346 int bool, grpbool; 347 char *strp; 348 349 *exp = (struct exportslist *)0; 350 if (!xdr_bool(xdrsp, &bool)) 351 return (0); 352 while (bool) { 353 ep = (struct exportslist *)malloc(sizeof(struct exportslist)); 354 if (ep == NULL) 355 return (0); 356 ep->ex_groups = (struct grouplist *)0; 357 strp = ep->ex_dirp; 358 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 359 return (0); 360 if (!xdr_bool(xdrsp, &grpbool)) 361 return (0); 362 while (grpbool) { 363 gp = (struct grouplist *)malloc(sizeof(struct grouplist)); 364 if (gp == NULL) 365 return (0); 366 strp = gp->gr_name; 367 if (!xdr_string(xdrsp, &strp, MNTNAMLEN)) 368 return (0); 369 gp->gr_next = ep->ex_groups; 370 ep->ex_groups = gp; 371 if (!xdr_bool(xdrsp, &grpbool)) 372 return (0); 373 } 374 ep->ex_next = *exp; 375 *exp = ep; 376 if (!xdr_bool(xdrsp, &bool)) 377 return (0); 378 } 379 return (1); 380 } 381 382 static void 383 usage(void) 384 { 385 fprintf(stderr, "usage: showmount [-a | -d] [-e3] [host]\n"); 386 exit(1); 387 } 388 389 /* 390 * Print the binary tree in inorder so that output is sorted. 391 */ 392 void 393 print_dump(struct mountlist *mp) 394 { 395 396 if (mp == NULL) 397 return; 398 if (mp->ml_left) 399 print_dump(mp->ml_left); 400 switch (type) { 401 case ALL: 402 printf("%s:%s\n", mp->ml_host, mp->ml_dirp); 403 break; 404 case DIRS: 405 printf("%s\n", mp->ml_dirp); 406 break; 407 default: 408 printf("%s\n", mp->ml_host); 409 break; 410 } 411 if (mp->ml_right) 412 print_dump(mp->ml_right); 413 } 414