1 /* $OpenBSD: showmount.c,v 1.17 2009/10/27 23:59:43 deraadt 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 53 /* Constant defs */ 54 #define ALL 1 55 #define DIRS 2 56 57 #define DODUMP 0x1 58 #define DOEXPORTS 0x2 59 60 struct mountlist { 61 struct mountlist *ml_left; 62 struct mountlist *ml_right; 63 char ml_host[RPCMNT_NAMELEN+1]; 64 char ml_dirp[RPCMNT_PATHLEN+1]; 65 }; 66 67 struct grouplist { 68 struct grouplist *gr_next; 69 char gr_name[RPCMNT_NAMELEN+1]; 70 }; 71 72 struct exportslist { 73 struct exportslist *ex_next; 74 struct grouplist *ex_groups; 75 char ex_dirp[RPCMNT_PATHLEN+1]; 76 }; 77 78 static struct mountlist *mntdump; 79 static struct exportslist *exports; 80 static int type = 0; 81 82 void print_dump(struct mountlist *); 83 void usage(void); 84 int xdr_mntdump(XDR *, struct mountlist **); 85 int xdr_exports(XDR *, struct exportslist **); 86 87 /* 88 * This command queries the NFS mount daemon for it's mount list and/or 89 * it's exports list and prints them out. 90 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A" 91 * and the "Network File System Protocol XXX.." 92 * for detailed information on the protocol. 93 */ 94 int 95 main(int argc, char *argv[]) 96 { 97 struct exportslist *exp; 98 struct grouplist *grp; 99 struct sockaddr_in clnt_sin; 100 struct hostent *hp; 101 struct timeval timeout; 102 int rpcs = 0, mntvers = 1; 103 enum clnt_stat estat; 104 CLIENT *client; 105 char *host; 106 int ch, clnt_sock; 107 108 while ((ch = getopt(argc, argv, "ade3")) != -1) 109 switch (ch) { 110 case 'a': 111 if (type == 0) { 112 type = ALL; 113 rpcs |= DODUMP; 114 } else 115 usage(); 116 break; 117 case 'd': 118 if (type == 0) { 119 type = DIRS; 120 rpcs |= DODUMP; 121 } else 122 usage(); 123 break; 124 case 'e': 125 rpcs |= DOEXPORTS; 126 break; 127 case '3': 128 mntvers = 3; 129 break; 130 default: 131 usage(); 132 } 133 argc -= optind; 134 argv += optind; 135 136 if (argc > 0) 137 host = *argv; 138 else 139 host = "localhost"; 140 141 if (rpcs == 0) 142 rpcs = DODUMP; 143 144 if ((hp = gethostbyname(host)) == NULL) { 145 fprintf(stderr, "showmount: unknown host %s\n", host); 146 exit(1); 147 } 148 bzero(&clnt_sin, sizeof clnt_sin); 149 clnt_sin.sin_len = sizeof clnt_sin; 150 clnt_sin.sin_family = AF_INET; 151 bcopy(hp->h_addr, (char *)&clnt_sin.sin_addr, hp->h_length); 152 clnt_sock = RPC_ANYSOCK; 153 client = clnttcp_create(&clnt_sin, RPCPROG_MNT, mntvers, 154 &clnt_sock, 0, 0); 155 if (client == NULL) { 156 clnt_pcreateerror("showmount: clnttcp_create"); 157 exit(1); 158 } 159 timeout.tv_sec = 30; 160 timeout.tv_usec = 0; 161 162 if (rpcs & DODUMP) { 163 estat = clnt_call(client, RPCMNT_DUMP, xdr_void, (char *)0, 164 xdr_mntdump, (char *)&mntdump, timeout); 165 if (estat != RPC_SUCCESS) { 166 fprintf(stderr, "showmount: Can't do Mountdump rpc: "); 167 clnt_perrno(estat); 168 exit(1); 169 } 170 } 171 if (rpcs & DOEXPORTS) { 172 estat = clnt_call(client, RPCMNT_EXPORT, xdr_void, (char *)0, 173 xdr_exports, (char *)&exports, timeout); 174 if (estat != RPC_SUCCESS) { 175 fprintf(stderr, "showmount: Can't do Exports rpc: "); 176 clnt_perrno(estat); 177 exit(1); 178 } 179 } 180 181 /* Now just print out the results */ 182 if (rpcs & DODUMP) { 183 switch (type) { 184 case ALL: 185 printf("All mount points on %s:\n", host); 186 break; 187 case DIRS: 188 printf("Directories on %s:\n", host); 189 break; 190 default: 191 printf("Hosts on %s:\n", host); 192 break; 193 } 194 print_dump(mntdump); 195 } 196 if (rpcs & DOEXPORTS) { 197 char vp[(RPCMNT_PATHLEN+1)*4]; 198 char vn[(RPCMNT_NAMELEN+1)*4]; 199 200 printf("Exports list on %s:\n", host); 201 exp = exports; 202 while (exp) { 203 strnvis(vp, exp->ex_dirp, sizeof vp, VIS_CSTYLE); 204 printf("%-34s ", vp); 205 grp = exp->ex_groups; 206 if (grp == NULL) { 207 printf("Everyone\n"); 208 } else { 209 while (grp) { 210 strnvis(vn, grp->gr_name, sizeof vn, 211 VIS_CSTYLE); 212 printf("%s ", vn); 213 grp = grp->gr_next; 214 } 215 printf("\n"); 216 } 217 exp = exp->ex_next; 218 } 219 } 220 221 exit(0); 222 } 223 224 /* 225 * Xdr routine for retrieving the mount dump list 226 */ 227 int 228 xdr_mntdump(XDR *xdrsp, struct mountlist **mlp) 229 { 230 struct mountlist *mp, **otp = NULL, *tp; 231 int bool, val, val2; 232 char *strp; 233 234 *mlp = (struct mountlist *)0; 235 if (!xdr_bool(xdrsp, &bool)) 236 return (0); 237 while (bool) { 238 mp = (struct mountlist *)malloc(sizeof(struct mountlist)); 239 if (mp == NULL) 240 return (0); 241 mp->ml_left = mp->ml_right = (struct mountlist *)0; 242 strp = mp->ml_host; 243 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 244 return (0); 245 strp = mp->ml_dirp; 246 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 247 return (0); 248 249 /* 250 * Build a binary tree on sorted order of either host or dirp. 251 * Drop any duplications. 252 */ 253 if (*mlp == NULL) { 254 *mlp = mp; 255 } else { 256 tp = *mlp; 257 while (tp) { 258 val = strcmp(mp->ml_host, tp->ml_host); 259 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 260 switch (type) { 261 case ALL: 262 if (val == 0) { 263 if (val2 == 0) { 264 free((caddr_t)mp); 265 goto next; 266 } 267 val = val2; 268 } 269 break; 270 case DIRS: 271 if (val2 == 0) { 272 free((caddr_t)mp); 273 goto next; 274 } 275 val = val2; 276 break; 277 default: 278 if (val == 0) { 279 free((caddr_t)mp); 280 goto next; 281 } 282 break; 283 } 284 if (val < 0) { 285 otp = &tp->ml_left; 286 tp = tp->ml_left; 287 } else { 288 otp = &tp->ml_right; 289 tp = tp->ml_right; 290 } 291 } 292 *otp = mp; 293 } 294 next: 295 if (!xdr_bool(xdrsp, &bool)) 296 return (0); 297 } 298 return (1); 299 } 300 301 /* 302 * Xdr routine to retrieve exports list 303 */ 304 int 305 xdr_exports(XDR *xdrsp, struct exportslist **exp) 306 { 307 struct exportslist *ep; 308 struct grouplist *gp; 309 int bool, grpbool; 310 char *strp; 311 312 *exp = (struct exportslist *)0; 313 if (!xdr_bool(xdrsp, &bool)) 314 return (0); 315 while (bool) { 316 ep = (struct exportslist *)malloc(sizeof(struct exportslist)); 317 if (ep == NULL) 318 return (0); 319 ep->ex_groups = (struct grouplist *)0; 320 strp = ep->ex_dirp; 321 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 322 return (0); 323 if (!xdr_bool(xdrsp, &grpbool)) 324 return (0); 325 while (grpbool) { 326 gp = (struct grouplist *)malloc( 327 sizeof(struct grouplist)); 328 if (gp == NULL) 329 return (0); 330 strp = gp->gr_name; 331 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 332 return (0); 333 gp->gr_next = ep->ex_groups; 334 ep->ex_groups = gp; 335 if (!xdr_bool(xdrsp, &grpbool)) 336 return (0); 337 } 338 ep->ex_next = *exp; 339 *exp = ep; 340 if (!xdr_bool(xdrsp, &bool)) 341 return (0); 342 } 343 return (1); 344 } 345 346 void 347 usage(void) 348 { 349 350 fprintf(stderr, "usage: showmount [-3ade] [host]\n"); 351 exit(1); 352 } 353 354 /* 355 * Print the binary tree in inorder so that output is sorted. 356 */ 357 void 358 print_dump(struct mountlist *mp) 359 { 360 char vn[(RPCMNT_NAMELEN+1)*4]; 361 char vp[(RPCMNT_PATHLEN+1)*4]; 362 363 if (mp == NULL) 364 return; 365 if (mp->ml_left) 366 print_dump(mp->ml_left); 367 switch (type) { 368 case ALL: 369 strvis(vn, mp->ml_host, VIS_CSTYLE); 370 strvis(vp, mp->ml_dirp, VIS_CSTYLE); 371 printf("%s:%s\n", vn, vp); 372 break; 373 case DIRS: 374 strvis(vp, mp->ml_dirp, VIS_CSTYLE); 375 printf("%s\n", vp); 376 break; 377 default: 378 strvis(vn, mp->ml_host, VIS_CSTYLE); 379 printf("%s\n", vn); 380 break; 381 } 382 if (mp->ml_right) 383 print_dump(mp->ml_right); 384 } 385