1 /* $OpenBSD: showmount.c,v 1.16 2007/03/29 11:27:33 jmc 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 #ifndef lint 37 static char copyright[] = 38 "@(#) Copyright (c) 1989, 1993, 1995\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)showmount.c 8.3 (Berkeley) 3/29/95"; 45 #endif 46 static char rcsid[] = "$OpenBSD: showmount.c,v 1.16 2007/03/29 11:27:33 jmc Exp $"; 47 #endif /* not lint */ 48 49 #include <sys/types.h> 50 #include <sys/file.h> 51 #include <sys/socket.h> 52 #include <sys/socketvar.h> 53 54 #include <netdb.h> 55 #include <rpc/rpc.h> 56 #include <rpc/pmap_clnt.h> 57 #include <rpc/pmap_prot.h> 58 #include <nfs/rpcv2.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 73 struct mountlist { 74 struct mountlist *ml_left; 75 struct mountlist *ml_right; 76 char ml_host[RPCMNT_NAMELEN+1]; 77 char ml_dirp[RPCMNT_PATHLEN+1]; 78 }; 79 80 struct grouplist { 81 struct grouplist *gr_next; 82 char gr_name[RPCMNT_NAMELEN+1]; 83 }; 84 85 struct exportslist { 86 struct exportslist *ex_next; 87 struct grouplist *ex_groups; 88 char ex_dirp[RPCMNT_PATHLEN+1]; 89 }; 90 91 static struct mountlist *mntdump; 92 static struct exportslist *exports; 93 static int type = 0; 94 95 void print_dump(struct mountlist *); 96 void usage(void); 97 int xdr_mntdump(XDR *, struct mountlist **); 98 int xdr_exports(XDR *, struct exportslist **); 99 100 /* 101 * This command queries the NFS mount daemon for it's mount list and/or 102 * it's exports list and prints them out. 103 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A" 104 * and the "Network File System Protocol XXX.." 105 * for detailed information on the protocol. 106 */ 107 int 108 main(int argc, char *argv[]) 109 { 110 struct exportslist *exp; 111 struct grouplist *grp; 112 struct sockaddr_in clnt_sin; 113 struct hostent *hp; 114 struct timeval timeout; 115 int rpcs = 0, mntvers = 1; 116 enum clnt_stat estat; 117 CLIENT *client; 118 char *host; 119 int ch, clnt_sock; 120 121 while ((ch = getopt(argc, argv, "ade3")) != -1) 122 switch (ch) { 123 case 'a': 124 if (type == 0) { 125 type = ALL; 126 rpcs |= DODUMP; 127 } else 128 usage(); 129 break; 130 case 'd': 131 if (type == 0) { 132 type = DIRS; 133 rpcs |= DODUMP; 134 } else 135 usage(); 136 break; 137 case 'e': 138 rpcs |= DOEXPORTS; 139 break; 140 case '3': 141 mntvers = 3; 142 break; 143 default: 144 usage(); 145 } 146 argc -= optind; 147 argv += optind; 148 149 if (argc > 0) 150 host = *argv; 151 else 152 host = "localhost"; 153 154 if (rpcs == 0) 155 rpcs = DODUMP; 156 157 if ((hp = gethostbyname(host)) == NULL) { 158 fprintf(stderr, "showmount: unknown host %s\n", host); 159 exit(1); 160 } 161 bzero(&clnt_sin, sizeof clnt_sin); 162 clnt_sin.sin_len = sizeof clnt_sin; 163 clnt_sin.sin_family = AF_INET; 164 bcopy(hp->h_addr, (char *)&clnt_sin.sin_addr, hp->h_length); 165 clnt_sock = RPC_ANYSOCK; 166 client = clnttcp_create(&clnt_sin, RPCPROG_MNT, mntvers, 167 &clnt_sock, 0, 0); 168 if (client == NULL) { 169 clnt_pcreateerror("showmount: clnttcp_create"); 170 exit(1); 171 } 172 timeout.tv_sec = 30; 173 timeout.tv_usec = 0; 174 175 if (rpcs & DODUMP) { 176 estat = clnt_call(client, RPCMNT_DUMP, xdr_void, (char *)0, 177 xdr_mntdump, (char *)&mntdump, timeout); 178 if (estat != RPC_SUCCESS) { 179 fprintf(stderr, "showmount: Can't do Mountdump rpc: "); 180 clnt_perrno(estat); 181 exit(1); 182 } 183 } 184 if (rpcs & DOEXPORTS) { 185 estat = clnt_call(client, RPCMNT_EXPORT, xdr_void, (char *)0, 186 xdr_exports, (char *)&exports, timeout); 187 if (estat != RPC_SUCCESS) { 188 fprintf(stderr, "showmount: Can't do Exports rpc: "); 189 clnt_perrno(estat); 190 exit(1); 191 } 192 } 193 194 /* Now just print out the results */ 195 if (rpcs & DODUMP) { 196 switch (type) { 197 case ALL: 198 printf("All mount points on %s:\n", host); 199 break; 200 case DIRS: 201 printf("Directories on %s:\n", host); 202 break; 203 default: 204 printf("Hosts on %s:\n", host); 205 break; 206 } 207 print_dump(mntdump); 208 } 209 if (rpcs & DOEXPORTS) { 210 char vp[(RPCMNT_PATHLEN+1)*4]; 211 char vn[(RPCMNT_NAMELEN+1)*4]; 212 213 printf("Exports list on %s:\n", host); 214 exp = exports; 215 while (exp) { 216 strnvis(vp, exp->ex_dirp, sizeof vp, VIS_CSTYLE); 217 printf("%-34s ", vp); 218 grp = exp->ex_groups; 219 if (grp == NULL) { 220 printf("Everyone\n"); 221 } else { 222 while (grp) { 223 strnvis(vn, grp->gr_name, sizeof vn, 224 VIS_CSTYLE); 225 printf("%s ", vn); 226 grp = grp->gr_next; 227 } 228 printf("\n"); 229 } 230 exp = exp->ex_next; 231 } 232 } 233 234 exit(0); 235 } 236 237 /* 238 * Xdr routine for retrieving the mount dump list 239 */ 240 int 241 xdr_mntdump(XDR *xdrsp, struct mountlist **mlp) 242 { 243 struct mountlist *mp, **otp = NULL, *tp; 244 int bool, val, val2; 245 char *strp; 246 247 *mlp = (struct mountlist *)0; 248 if (!xdr_bool(xdrsp, &bool)) 249 return (0); 250 while (bool) { 251 mp = (struct mountlist *)malloc(sizeof(struct mountlist)); 252 if (mp == NULL) 253 return (0); 254 mp->ml_left = mp->ml_right = (struct mountlist *)0; 255 strp = mp->ml_host; 256 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 257 return (0); 258 strp = mp->ml_dirp; 259 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 260 return (0); 261 262 /* 263 * Build a binary tree on sorted order of either host or dirp. 264 * Drop any duplications. 265 */ 266 if (*mlp == NULL) { 267 *mlp = mp; 268 } else { 269 tp = *mlp; 270 while (tp) { 271 val = strcmp(mp->ml_host, tp->ml_host); 272 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 273 switch (type) { 274 case ALL: 275 if (val == 0) { 276 if (val2 == 0) { 277 free((caddr_t)mp); 278 goto next; 279 } 280 val = val2; 281 } 282 break; 283 case DIRS: 284 if (val2 == 0) { 285 free((caddr_t)mp); 286 goto next; 287 } 288 val = val2; 289 break; 290 default: 291 if (val == 0) { 292 free((caddr_t)mp); 293 goto next; 294 } 295 break; 296 } 297 if (val < 0) { 298 otp = &tp->ml_left; 299 tp = tp->ml_left; 300 } else { 301 otp = &tp->ml_right; 302 tp = tp->ml_right; 303 } 304 } 305 *otp = mp; 306 } 307 next: 308 if (!xdr_bool(xdrsp, &bool)) 309 return (0); 310 } 311 return (1); 312 } 313 314 /* 315 * Xdr routine to retrieve exports list 316 */ 317 int 318 xdr_exports(XDR *xdrsp, struct exportslist **exp) 319 { 320 struct exportslist *ep; 321 struct grouplist *gp; 322 int bool, grpbool; 323 char *strp; 324 325 *exp = (struct exportslist *)0; 326 if (!xdr_bool(xdrsp, &bool)) 327 return (0); 328 while (bool) { 329 ep = (struct exportslist *)malloc(sizeof(struct exportslist)); 330 if (ep == NULL) 331 return (0); 332 ep->ex_groups = (struct grouplist *)0; 333 strp = ep->ex_dirp; 334 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 335 return (0); 336 if (!xdr_bool(xdrsp, &grpbool)) 337 return (0); 338 while (grpbool) { 339 gp = (struct grouplist *)malloc( 340 sizeof(struct grouplist)); 341 if (gp == NULL) 342 return (0); 343 strp = gp->gr_name; 344 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 345 return (0); 346 gp->gr_next = ep->ex_groups; 347 ep->ex_groups = gp; 348 if (!xdr_bool(xdrsp, &grpbool)) 349 return (0); 350 } 351 ep->ex_next = *exp; 352 *exp = ep; 353 if (!xdr_bool(xdrsp, &bool)) 354 return (0); 355 } 356 return (1); 357 } 358 359 void 360 usage(void) 361 { 362 363 fprintf(stderr, "usage: showmount [-3ade] [host]\n"); 364 exit(1); 365 } 366 367 /* 368 * Print the binary tree in inorder so that output is sorted. 369 */ 370 void 371 print_dump(struct mountlist *mp) 372 { 373 char vn[(RPCMNT_NAMELEN+1)*4]; 374 char vp[(RPCMNT_PATHLEN+1)*4]; 375 376 if (mp == NULL) 377 return; 378 if (mp->ml_left) 379 print_dump(mp->ml_left); 380 switch (type) { 381 case ALL: 382 strvis(vn, mp->ml_host, VIS_CSTYLE); 383 strvis(vp, mp->ml_dirp, VIS_CSTYLE); 384 printf("%s:%s\n", vn, vp); 385 break; 386 case DIRS: 387 strvis(vp, mp->ml_dirp, VIS_CSTYLE); 388 printf("%s\n", vp); 389 break; 390 default: 391 strvis(vn, mp->ml_host, VIS_CSTYLE); 392 printf("%s\n", vn); 393 break; 394 } 395 if (mp->ml_right) 396 print_dump(mp->ml_right); 397 } 398