1 /* $OpenBSD: showmount.c,v 1.20 2016/03/16 15:41:11 krw Exp $ */ 2 /* $NetBSD: showmount.c,v 1.7 1996/05/01 18:14:10 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1989, 1993, 1995 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Rick Macklem at The University of Guelph. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/types.h> 37 #include <sys/file.h> 38 #include <sys/socket.h> 39 #include <sys/socketvar.h> 40 41 #include <netdb.h> 42 #include <rpc/rpc.h> 43 #include <rpc/pmap_clnt.h> 44 #include <rpc/pmap_prot.h> 45 #include <nfs/rpcv2.h> 46 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <unistd.h> 51 #include <vis.h> 52 #include <err.h> 53 54 /* Constant defs */ 55 #define ALL 1 56 #define DIRS 2 57 58 #define DODUMP 0x1 59 #define DOEXPORTS 0x2 60 61 struct mountlist { 62 struct mountlist *ml_left; 63 struct mountlist *ml_right; 64 char ml_host[RPCMNT_NAMELEN+1]; 65 char ml_dirp[RPCMNT_PATHLEN+1]; 66 }; 67 68 struct grouplist { 69 struct grouplist *gr_next; 70 char gr_name[RPCMNT_NAMELEN+1]; 71 }; 72 73 struct exportslist { 74 struct exportslist *ex_next; 75 struct grouplist *ex_groups; 76 char ex_dirp[RPCMNT_PATHLEN+1]; 77 }; 78 79 static struct mountlist *mntdump; 80 static struct exportslist *exports; 81 static int type = 0; 82 83 void print_dump(struct mountlist *); 84 void usage(void); 85 int xdr_mntdump(XDR *, struct mountlist **); 86 int xdr_exports(XDR *, struct exportslist **); 87 88 /* 89 * This command queries the NFS mount daemon for it's mount list and/or 90 * it's exports list and prints them out. 91 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A" 92 * and the "Network File System Protocol XXX.." 93 * for detailed information on the protocol. 94 */ 95 int 96 main(int argc, char *argv[]) 97 { 98 struct exportslist *exp; 99 struct grouplist *grp; 100 struct sockaddr_in clnt_sin; 101 struct hostent *hp; 102 struct timeval timeout; 103 int rpcs = 0, mntvers = 1; 104 enum clnt_stat estat; 105 CLIENT *client; 106 char *host; 107 int ch, clnt_sock; 108 109 if (pledge("stdio rpath inet dns", NULL) == -1) 110 err(1, "pledge"); 111 112 while ((ch = getopt(argc, argv, "ade3")) != -1) 113 switch (ch) { 114 case 'a': 115 if (type == 0) { 116 type = ALL; 117 rpcs |= DODUMP; 118 } else 119 usage(); 120 break; 121 case 'd': 122 if (type == 0) { 123 type = DIRS; 124 rpcs |= DODUMP; 125 } else 126 usage(); 127 break; 128 case 'e': 129 rpcs |= DOEXPORTS; 130 break; 131 case '3': 132 mntvers = 3; 133 break; 134 default: 135 usage(); 136 } 137 argc -= optind; 138 argv += optind; 139 140 if (argc > 0) 141 host = *argv; 142 else 143 host = "localhost"; 144 145 if (rpcs == 0) 146 rpcs = DODUMP; 147 148 if ((hp = gethostbyname(host)) == NULL) { 149 fprintf(stderr, "showmount: unknown host %s\n", host); 150 exit(1); 151 } 152 bzero(&clnt_sin, sizeof clnt_sin); 153 clnt_sin.sin_len = sizeof clnt_sin; 154 clnt_sin.sin_family = AF_INET; 155 bcopy(hp->h_addr, (char *)&clnt_sin.sin_addr, hp->h_length); 156 clnt_sock = RPC_ANYSOCK; 157 client = clnttcp_create(&clnt_sin, RPCPROG_MNT, mntvers, 158 &clnt_sock, 0, 0); 159 if (client == NULL) { 160 clnt_pcreateerror("showmount: clnttcp_create"); 161 exit(1); 162 } 163 timeout.tv_sec = 30; 164 timeout.tv_usec = 0; 165 166 if (pledge("stdio rpath", NULL) == -1) 167 err(1, "pledge"); 168 169 if (rpcs & DODUMP) { 170 estat = clnt_call(client, RPCMNT_DUMP, xdr_void, NULL, 171 xdr_mntdump, (char *)&mntdump, timeout); 172 if (estat != RPC_SUCCESS) { 173 fprintf(stderr, "showmount: Can't do Mountdump rpc: "); 174 clnt_perrno(estat); 175 exit(1); 176 } 177 } 178 if (rpcs & DOEXPORTS) { 179 estat = clnt_call(client, RPCMNT_EXPORT, xdr_void, NULL, 180 xdr_exports, (char *)&exports, timeout); 181 if (estat != RPC_SUCCESS) { 182 fprintf(stderr, "showmount: Can't do Exports rpc: "); 183 clnt_perrno(estat); 184 exit(1); 185 } 186 } 187 188 /* Now just print out the results */ 189 if (rpcs & DODUMP) { 190 switch (type) { 191 case ALL: 192 printf("All mount points on %s:\n", host); 193 break; 194 case DIRS: 195 printf("Directories on %s:\n", host); 196 break; 197 default: 198 printf("Hosts on %s:\n", host); 199 break; 200 } 201 print_dump(mntdump); 202 } 203 if (rpcs & DOEXPORTS) { 204 char vp[(RPCMNT_PATHLEN+1)*4]; 205 char vn[(RPCMNT_NAMELEN+1)*4]; 206 207 printf("Exports list on %s:\n", host); 208 exp = exports; 209 while (exp) { 210 strnvis(vp, exp->ex_dirp, sizeof vp, VIS_CSTYLE); 211 printf("%-34s ", vp); 212 grp = exp->ex_groups; 213 if (grp == NULL) { 214 printf("Everyone\n"); 215 } else { 216 while (grp) { 217 strnvis(vn, grp->gr_name, sizeof vn, 218 VIS_CSTYLE); 219 printf("%s ", vn); 220 grp = grp->gr_next; 221 } 222 printf("\n"); 223 } 224 exp = exp->ex_next; 225 } 226 } 227 228 exit(0); 229 } 230 231 /* 232 * Xdr routine for retrieving the mount dump list 233 */ 234 int 235 xdr_mntdump(XDR *xdrsp, struct mountlist **mlp) 236 { 237 struct mountlist *mp, **otp = NULL, *tp; 238 int bool, val, val2; 239 char *strp; 240 241 *mlp = NULL; 242 if (!xdr_bool(xdrsp, &bool)) 243 return (0); 244 while (bool) { 245 mp = malloc(sizeof(struct mountlist)); 246 if (mp == NULL) 247 return (0); 248 mp->ml_left = mp->ml_right = NULL; 249 strp = mp->ml_host; 250 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 251 return (0); 252 strp = mp->ml_dirp; 253 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 254 return (0); 255 256 /* 257 * Build a binary tree on sorted order of either host or dirp. 258 * Drop any duplications. 259 */ 260 if (*mlp == NULL) { 261 *mlp = mp; 262 } else { 263 tp = *mlp; 264 while (tp) { 265 val = strcmp(mp->ml_host, tp->ml_host); 266 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 267 switch (type) { 268 case ALL: 269 if (val == 0) { 270 if (val2 == 0) { 271 free((caddr_t)mp); 272 goto next; 273 } 274 val = val2; 275 } 276 break; 277 case DIRS: 278 if (val2 == 0) { 279 free((caddr_t)mp); 280 goto next; 281 } 282 val = val2; 283 break; 284 default: 285 if (val == 0) { 286 free((caddr_t)mp); 287 goto next; 288 } 289 break; 290 } 291 if (val < 0) { 292 otp = &tp->ml_left; 293 tp = tp->ml_left; 294 } else { 295 otp = &tp->ml_right; 296 tp = tp->ml_right; 297 } 298 } 299 *otp = mp; 300 } 301 next: 302 if (!xdr_bool(xdrsp, &bool)) 303 return (0); 304 } 305 return (1); 306 } 307 308 /* 309 * Xdr routine to retrieve exports list 310 */ 311 int 312 xdr_exports(XDR *xdrsp, struct exportslist **exp) 313 { 314 struct exportslist *ep; 315 struct grouplist *gp; 316 int bool, grpbool; 317 char *strp; 318 319 *exp = NULL; 320 if (!xdr_bool(xdrsp, &bool)) 321 return (0); 322 while (bool) { 323 ep = malloc(sizeof(struct exportslist)); 324 if (ep == NULL) 325 return (0); 326 ep->ex_groups = NULL; 327 strp = ep->ex_dirp; 328 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 329 return (0); 330 if (!xdr_bool(xdrsp, &grpbool)) 331 return (0); 332 while (grpbool) { 333 gp = malloc(sizeof(struct grouplist)); 334 if (gp == NULL) 335 return (0); 336 strp = gp->gr_name; 337 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 338 return (0); 339 gp->gr_next = ep->ex_groups; 340 ep->ex_groups = gp; 341 if (!xdr_bool(xdrsp, &grpbool)) 342 return (0); 343 } 344 ep->ex_next = *exp; 345 *exp = ep; 346 if (!xdr_bool(xdrsp, &bool)) 347 return (0); 348 } 349 return (1); 350 } 351 352 void 353 usage(void) 354 { 355 356 fprintf(stderr, "usage: showmount [-3ade] [host]\n"); 357 exit(1); 358 } 359 360 /* 361 * Print the binary tree in inorder so that output is sorted. 362 */ 363 void 364 print_dump(struct mountlist *mp) 365 { 366 char vn[(RPCMNT_NAMELEN+1)*4]; 367 char vp[(RPCMNT_PATHLEN+1)*4]; 368 369 if (mp == NULL) 370 return; 371 if (mp->ml_left) 372 print_dump(mp->ml_left); 373 switch (type) { 374 case ALL: 375 strvis(vn, mp->ml_host, VIS_CSTYLE); 376 strvis(vp, mp->ml_dirp, VIS_CSTYLE); 377 printf("%s:%s\n", vn, vp); 378 break; 379 case DIRS: 380 strvis(vp, mp->ml_dirp, VIS_CSTYLE); 381 printf("%s\n", vp); 382 break; 383 default: 384 strvis(vn, mp->ml_host, VIS_CSTYLE); 385 printf("%s\n", vn); 386 break; 387 } 388 if (mp->ml_right) 389 print_dump(mp->ml_right); 390 } 391