1 /* $NetBSD: showmount.c,v 1.17 2009/04/13 07:30:49 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993, 1995 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 __COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1995\ 38 The Regents of the University of California. All rights reserved."); 39 #endif /* not lint */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)showmount.c 8.3 (Berkeley) 3/29/95"; 44 #endif 45 __RCSID("$NetBSD: showmount.c,v 1.17 2009/04/13 07:30:49 lukem Exp $"); 46 #endif /* not lint */ 47 48 #include <sys/types.h> 49 #include <sys/file.h> 50 #include <sys/socket.h> 51 52 #include <netdb.h> 53 #include <rpc/rpc.h> 54 #include <rpc/pmap_clnt.h> 55 #include <rpc/pmap_prot.h> 56 #include <nfs/rpcv2.h> 57 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 /* Constant defs */ 64 #define ALL 1 65 #define DIRS 2 66 67 #define DODUMP 0x1 68 #define DOEXPORTS 0x2 69 70 struct mountlist { 71 struct mountlist *ml_left; 72 struct mountlist *ml_right; 73 char ml_host[RPCMNT_NAMELEN+1]; 74 char ml_dirp[RPCMNT_PATHLEN+1]; 75 }; 76 77 struct grouplist { 78 struct grouplist *gr_next; 79 char gr_name[RPCMNT_NAMELEN+1]; 80 }; 81 82 struct exportslist { 83 struct exportslist *ex_next; 84 struct grouplist *ex_groups; 85 char ex_dirp[RPCMNT_PATHLEN+1]; 86 }; 87 88 static struct mountlist *mntdump; 89 static struct exportslist *exports; 90 static int type = 0; 91 92 int main(int, char **); 93 void print_dump(struct mountlist *); 94 void usage(void); 95 int xdr_mntdump(XDR *, struct mountlist **); 96 int xdr_exports(XDR *, struct exportslist **); 97 int tcp_callrpc(const char *host, int prognum, int versnum, int procnum, 98 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out); 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 int estat, rpcs = 0, mntvers = 1; 113 const char *host; 114 int ch; 115 int len; 116 117 while ((ch = getopt(argc, argv, "ade3")) != -1) 118 switch((char)ch) { 119 case 'a': 120 if (type == 0) { 121 type = ALL; 122 rpcs |= DODUMP; 123 } else 124 usage(); 125 break; 126 case 'd': 127 if (type == 0) { 128 type = DIRS; 129 rpcs |= DODUMP; 130 } else 131 usage(); 132 break; 133 case 'e': 134 rpcs |= DOEXPORTS; 135 break; 136 case '3': 137 mntvers = 3; 138 break; 139 case '?': 140 default: 141 usage(); 142 } 143 argc -= optind; 144 argv += optind; 145 146 if (argc > 0) 147 host = *argv; 148 else 149 host = "localhost"; 150 151 if (rpcs == 0) 152 rpcs = DODUMP; 153 154 if (rpcs & DODUMP) 155 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers, 156 RPCMNT_DUMP, xdr_void, (char *)0, 157 xdr_mntdump, (char *)&mntdump)) != 0) { 158 fprintf(stderr, "showmount: Can't do Mountdump rpc: "); 159 clnt_perrno(estat); 160 exit(1); 161 } 162 if (rpcs & DOEXPORTS) 163 if ((estat = tcp_callrpc(host, RPCPROG_MNT, mntvers, 164 RPCMNT_EXPORT, xdr_void, (char *)0, 165 xdr_exports, (char *)&exports)) != 0) { 166 fprintf(stderr, "showmount: Can't do Exports rpc: "); 167 clnt_perrno(estat); 168 exit(1); 169 } 170 171 /* Now just print out the results */ 172 if (rpcs & DODUMP) { 173 switch (type) { 174 case ALL: 175 printf("All mount points on %s:\n", host); 176 break; 177 case DIRS: 178 printf("Directories on %s:\n", host); 179 break; 180 default: 181 printf("Hosts on %s:\n", host); 182 break; 183 }; 184 print_dump(mntdump); 185 } 186 if (rpcs & DOEXPORTS) { 187 printf("Exports list on %s:\n", host); 188 exp = exports; 189 while (exp) { 190 len = printf("%-35s", exp->ex_dirp); 191 if (len > 35) 192 printf("\t"); 193 grp = exp->ex_groups; 194 if (grp == NULL) { 195 printf("Everyone\n"); 196 } else { 197 while (grp) { 198 printf("%s ", grp->gr_name); 199 grp = grp->gr_next; 200 } 201 printf("\n"); 202 } 203 exp = exp->ex_next; 204 } 205 } 206 207 exit(0); 208 } 209 210 /* 211 * tcp_callrpc has the same interface as callrpc, but tries to 212 * use tcp as transport method in order to handle large replies. 213 */ 214 215 int 216 tcp_callrpc(const char *host, int prognum, int versnum, int procnum, 217 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out) 218 { 219 CLIENT *client; 220 struct timeval timeout; 221 int rval; 222 223 if ((client = clnt_create(host, prognum, versnum, "tcp")) == NULL && 224 (client = clnt_create(host, prognum, versnum, "udp")) == NULL) 225 return ((int) rpc_createerr.cf_stat); 226 227 timeout.tv_sec = 25; 228 timeout.tv_usec = 0; 229 rval = (int) clnt_call(client, procnum, 230 inproc, in, 231 outproc, out, 232 timeout); 233 clnt_destroy(client); 234 return rval; 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, *tp; 244 int bool, val, val2; 245 char *strp; 246 247 otp = NULL; 248 *mlp = (struct mountlist *)0; 249 if (!xdr_bool(xdrsp, &bool)) 250 return (0); 251 while (bool) { 252 mp = (struct mountlist *)malloc(sizeof(struct mountlist)); 253 if (mp == NULL) 254 return (0); 255 mp->ml_left = mp->ml_right = (struct mountlist *)0; 256 strp = mp->ml_host; 257 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 258 return (0); 259 strp = mp->ml_dirp; 260 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 261 return (0); 262 263 /* 264 * Build a binary tree on sorted order of either host or dirp. 265 * Drop any duplications. 266 */ 267 if (*mlp == NULL) { 268 *mlp = mp; 269 } else { 270 tp = *mlp; 271 while (tp) { 272 val = strcmp(mp->ml_host, tp->ml_host); 273 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 274 switch (type) { 275 case ALL: 276 if (val == 0) { 277 if (val2 == 0) { 278 free((caddr_t)mp); 279 goto next; 280 } 281 val = val2; 282 } 283 break; 284 case DIRS: 285 if (val2 == 0) { 286 free((caddr_t)mp); 287 goto next; 288 } 289 val = val2; 290 break; 291 default: 292 if (val == 0) { 293 free((caddr_t)mp); 294 goto next; 295 } 296 break; 297 }; 298 if (val < 0) { 299 otp = &tp->ml_left; 300 tp = tp->ml_left; 301 } else { 302 otp = &tp->ml_right; 303 tp = tp->ml_right; 304 } 305 } 306 *otp = mp; 307 } 308 next: 309 if (!xdr_bool(xdrsp, &bool)) 310 return (0); 311 } 312 return (1); 313 } 314 315 /* 316 * Xdr routine to retrieve exports list 317 */ 318 int 319 xdr_exports(XDR *xdrsp, struct exportslist **exp) 320 { 321 struct exportslist *ep; 322 struct grouplist *gp; 323 int bool, grpbool; 324 char *strp; 325 326 *exp = (struct exportslist *)0; 327 if (!xdr_bool(xdrsp, &bool)) 328 return (0); 329 while (bool) { 330 ep = (struct exportslist *)malloc(sizeof(struct exportslist)); 331 if (ep == NULL) 332 return (0); 333 ep->ex_groups = (struct grouplist *)0; 334 strp = ep->ex_dirp; 335 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 336 return (0); 337 if (!xdr_bool(xdrsp, &grpbool)) 338 return (0); 339 while (grpbool) { 340 gp = (struct grouplist *)malloc(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() 361 { 362 363 fprintf(stderr, "usage: showmount [-ade3] 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 { 373 374 if (mp == NULL) 375 return; 376 if (mp->ml_left) 377 print_dump(mp->ml_left); 378 switch (type) { 379 case ALL: 380 printf("%s:%s\n", mp->ml_host, mp->ml_dirp); 381 break; 382 case DIRS: 383 printf("%s\n", mp->ml_dirp); 384 break; 385 default: 386 printf("%s\n", mp->ml_host); 387 break; 388 }; 389 if (mp->ml_right) 390 print_dump(mp->ml_right); 391 } 392