1 /* $OpenBSD: showmount.c,v 1.8 2001/08/12 12:03:03 heko 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. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 #ifndef lint 41 static char copyright[] = 42 "@(#) Copyright (c) 1989, 1993, 1995\n\ 43 The Regents of the University of California. All rights reserved.\n"; 44 #endif /* not lint */ 45 46 #ifndef lint 47 #if 0 48 static char sccsid[] = "@(#)showmount.c 8.3 (Berkeley) 3/29/95"; 49 #endif 50 static char rcsid[] = "$OpenBSD: showmount.c,v 1.8 2001/08/12 12:03:03 heko Exp $"; 51 #endif /* not lint */ 52 53 #include <sys/types.h> 54 #include <sys/file.h> 55 #include <sys/socket.h> 56 #include <sys/socketvar.h> 57 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 #include <vis.h> 69 70 /* Constant defs */ 71 #define ALL 1 72 #define DIRS 2 73 74 #define DODUMP 0x1 75 #define DOEXPORTS 0x2 76 77 struct mountlist { 78 struct mountlist *ml_left; 79 struct mountlist *ml_right; 80 char ml_host[RPCMNT_NAMELEN+1]; 81 char ml_dirp[RPCMNT_PATHLEN+1]; 82 }; 83 84 struct grouplist { 85 struct grouplist *gr_next; 86 char gr_name[RPCMNT_NAMELEN+1]; 87 }; 88 89 struct exportslist { 90 struct exportslist *ex_next; 91 struct grouplist *ex_groups; 92 char ex_dirp[RPCMNT_PATHLEN+1]; 93 }; 94 95 static struct mountlist *mntdump; 96 static struct exportslist *exports; 97 static int type = 0; 98 99 void print_dump __P((struct mountlist *)); 100 void usage __P((void)); 101 int xdr_mntdump __P((XDR *, struct mountlist **)); 102 int xdr_exports __P((XDR *, struct exportslist **)); 103 104 /* 105 * This command queries the NFS mount daemon for it's mount list and/or 106 * it's exports list and prints them out. 107 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A" 108 * and the "Network File System Protocol XXX.." 109 * for detailed information on the protocol. 110 */ 111 int 112 main(argc, argv) 113 int argc; 114 char **argv; 115 { 116 struct exportslist *exp; 117 struct grouplist *grp; 118 struct sockaddr_in clnt_sin; 119 struct hostent *hp; 120 struct timeval timeout; 121 int rpcs = 0, mntvers = 1; 122 enum clnt_stat estat; 123 CLIENT *client; 124 char *host; 125 int ch, clnt_sock; 126 127 while ((ch = getopt(argc, argv, "ade3")) != -1) 128 switch((char)ch) { 129 case 'a': 130 if (type == 0) { 131 type = ALL; 132 rpcs |= DODUMP; 133 } else 134 usage(); 135 break; 136 case 'd': 137 if (type == 0) { 138 type = DIRS; 139 rpcs |= DODUMP; 140 } else 141 usage(); 142 break; 143 case 'e': 144 rpcs |= DOEXPORTS; 145 break; 146 case '3': 147 mntvers = 3; 148 break; 149 case '?': 150 default: 151 usage(); 152 } 153 argc -= optind; 154 argv += optind; 155 156 if (argc > 0) 157 host = *argv; 158 else 159 host = "localhost"; 160 161 if (rpcs == 0) 162 rpcs = DODUMP; 163 164 if ((hp = gethostbyname(host)) == NULL) { 165 fprintf(stderr, "showmount: unknown host %s\n", host); 166 exit(1); 167 } 168 bzero(&clnt_sin, sizeof clnt_sin); 169 clnt_sin.sin_len = sizeof clnt_sin; 170 clnt_sin.sin_family = AF_INET; 171 bcopy(hp->h_addr, (char *)&clnt_sin.sin_addr, hp->h_length); 172 clnt_sock = RPC_ANYSOCK; 173 client = clnttcp_create(&clnt_sin, RPCPROG_MNT, mntvers, 174 &clnt_sock, 0, 0); 175 if (client == NULL) { 176 clnt_pcreateerror("showmount: clnttcp_create"); 177 exit(1); 178 } 179 timeout.tv_sec = 30; 180 timeout.tv_usec = 0; 181 182 if (rpcs & DODUMP) { 183 estat = clnt_call(client, RPCMNT_DUMP, xdr_void, (char *)0, 184 xdr_mntdump, (char *)&mntdump, timeout); 185 if (estat != RPC_SUCCESS) { 186 fprintf(stderr, "showmount: Can't do Mountdump rpc: "); 187 clnt_perrno(estat); 188 exit(1); 189 } 190 } 191 if (rpcs & DOEXPORTS) { 192 estat = clnt_call(client, RPCMNT_EXPORT, xdr_void, (char *)0, 193 xdr_exports, (char *)&exports, timeout); 194 if (estat != RPC_SUCCESS) { 195 fprintf(stderr, "showmount: Can't do Exports rpc: "); 196 clnt_perrno(estat); 197 exit(1); 198 } 199 } 200 201 /* Now just print out the results */ 202 if (rpcs & DODUMP) { 203 switch (type) { 204 case ALL: 205 printf("All mount points on %s:\n", host); 206 break; 207 case DIRS: 208 printf("Directories on %s:\n", host); 209 break; 210 default: 211 printf("Hosts on %s:\n", host); 212 break; 213 }; 214 print_dump(mntdump); 215 } 216 if (rpcs & DOEXPORTS) { 217 char vp[(RPCMNT_PATHLEN+1)*4]; 218 char vn[(RPCMNT_NAMELEN+1)*4]; 219 220 printf("Exports list on %s:\n", host); 221 exp = exports; 222 while (exp) { 223 strvis(vp, exp->ex_dirp, VIS_CSTYLE); 224 printf("%-35s", vp); 225 grp = exp->ex_groups; 226 if (grp == NULL) { 227 printf("Everyone\n"); 228 } else { 229 while (grp) { 230 strvis(vn, grp->gr_name, VIS_CSTYLE); 231 printf("%s ", vn); 232 grp = grp->gr_next; 233 } 234 printf("\n"); 235 } 236 exp = exp->ex_next; 237 } 238 } 239 240 exit(0); 241 } 242 243 /* 244 * Xdr routine for retrieving the mount dump list 245 */ 246 int 247 xdr_mntdump(xdrsp, mlp) 248 XDR *xdrsp; 249 struct mountlist **mlp; 250 { 251 struct mountlist *mp, **otp = NULL, *tp; 252 int bool, val, val2; 253 char *strp; 254 255 *mlp = (struct mountlist *)0; 256 if (!xdr_bool(xdrsp, &bool)) 257 return (0); 258 while (bool) { 259 mp = (struct mountlist *)malloc(sizeof(struct mountlist)); 260 if (mp == NULL) 261 return (0); 262 mp->ml_left = mp->ml_right = (struct mountlist *)0; 263 strp = mp->ml_host; 264 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 265 return (0); 266 strp = mp->ml_dirp; 267 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 268 return (0); 269 270 /* 271 * Build a binary tree on sorted order of either host or dirp. 272 * Drop any duplications. 273 */ 274 if (*mlp == NULL) { 275 *mlp = mp; 276 } else { 277 tp = *mlp; 278 while (tp) { 279 val = strcmp(mp->ml_host, tp->ml_host); 280 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 281 switch (type) { 282 case ALL: 283 if (val == 0) { 284 if (val2 == 0) { 285 free((caddr_t)mp); 286 goto next; 287 } 288 val = val2; 289 } 290 break; 291 case DIRS: 292 if (val2 == 0) { 293 free((caddr_t)mp); 294 goto next; 295 } 296 val = val2; 297 break; 298 default: 299 if (val == 0) { 300 free((caddr_t)mp); 301 goto next; 302 } 303 break; 304 } 305 if (val < 0) { 306 otp = &tp->ml_left; 307 tp = tp->ml_left; 308 } else { 309 otp = &tp->ml_right; 310 tp = tp->ml_right; 311 } 312 } 313 *otp = mp; 314 } 315 next: 316 if (!xdr_bool(xdrsp, &bool)) 317 return (0); 318 } 319 return (1); 320 } 321 322 /* 323 * Xdr routine to retrieve exports list 324 */ 325 int 326 xdr_exports(xdrsp, exp) 327 XDR *xdrsp; 328 struct exportslist **exp; 329 { 330 struct exportslist *ep; 331 struct grouplist *gp; 332 int bool, grpbool; 333 char *strp; 334 335 *exp = (struct exportslist *)0; 336 if (!xdr_bool(xdrsp, &bool)) 337 return (0); 338 while (bool) { 339 ep = (struct exportslist *)malloc(sizeof(struct exportslist)); 340 if (ep == NULL) 341 return (0); 342 ep->ex_groups = (struct grouplist *)0; 343 strp = ep->ex_dirp; 344 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 345 return (0); 346 if (!xdr_bool(xdrsp, &grpbool)) 347 return (0); 348 while (grpbool) { 349 gp = (struct grouplist *)malloc( 350 sizeof(struct grouplist)); 351 if (gp == NULL) 352 return (0); 353 strp = gp->gr_name; 354 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 355 return (0); 356 gp->gr_next = ep->ex_groups; 357 ep->ex_groups = gp; 358 if (!xdr_bool(xdrsp, &grpbool)) 359 return (0); 360 } 361 ep->ex_next = *exp; 362 *exp = ep; 363 if (!xdr_bool(xdrsp, &bool)) 364 return (0); 365 } 366 return (1); 367 } 368 369 void 370 usage() 371 { 372 373 fprintf(stderr, "usage: showmount [-ade3] host\n"); 374 exit(1); 375 } 376 377 /* 378 * Print the binary tree in inorder so that output is sorted. 379 */ 380 void 381 print_dump(mp) 382 struct mountlist *mp; 383 { 384 char vn[(RPCMNT_NAMELEN+1)*4]; 385 char vp[(RPCMNT_PATHLEN+1)*4]; 386 387 if (mp == NULL) 388 return; 389 if (mp->ml_left) 390 print_dump(mp->ml_left); 391 switch (type) { 392 case ALL: 393 strvis(vn, mp->ml_host, VIS_CSTYLE); 394 strvis(vp, mp->ml_dirp, VIS_CSTYLE); 395 printf("%s:%s\n", vn, vp); 396 break; 397 case DIRS: 398 strvis(vp, mp->ml_dirp, VIS_CSTYLE); 399 printf("%s\n", vp); 400 break; 401 default: 402 strvis(vn, mp->ml_host, VIS_CSTYLE); 403 printf("%s\n", vn); 404 break; 405 }; 406 if (mp->ml_right) 407 print_dump(mp->ml_right); 408 } 409