1 /* $NetBSD: showmount.c,v 1.11 2001/01/16 02:50:30 cgd 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifndef lint 41 __COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1995\n\ 42 The Regents of the University of California. All rights reserved.\n"); 43 #endif /* not lint */ 44 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)showmount.c 8.3 (Berkeley) 3/29/95"; 48 #endif 49 __RCSID("$NetBSD: showmount.c,v 1.11 2001/01/16 02:50:30 cgd Exp $"); 50 #endif /* not lint */ 51 52 #include <sys/types.h> 53 #include <sys/file.h> 54 #include <sys/socket.h> 55 56 #include <netdb.h> 57 #include <rpc/rpc.h> 58 #include <rpc/pmap_clnt.h> 59 #include <rpc/pmap_prot.h> 60 #include <nfs/rpcv2.h> 61 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <unistd.h> 66 67 /* Constant defs */ 68 #define ALL 1 69 #define DIRS 2 70 71 #define DODUMP 0x1 72 #define DOEXPORTS 0x2 73 74 struct mountlist { 75 struct mountlist *ml_left; 76 struct mountlist *ml_right; 77 char ml_host[RPCMNT_NAMELEN+1]; 78 char ml_dirp[RPCMNT_PATHLEN+1]; 79 }; 80 81 struct grouplist { 82 struct grouplist *gr_next; 83 char gr_name[RPCMNT_NAMELEN+1]; 84 }; 85 86 struct exportslist { 87 struct exportslist *ex_next; 88 struct grouplist *ex_groups; 89 char ex_dirp[RPCMNT_PATHLEN+1]; 90 }; 91 92 static struct mountlist *mntdump; 93 static struct exportslist *exports; 94 static int type = 0; 95 96 int main __P((int, char **)); 97 void print_dump __P((struct mountlist *)); 98 void usage __P((void)); 99 int xdr_mntdump __P((XDR *, struct mountlist **)); 100 int xdr_exports __P((XDR *, struct exportslist **)); 101 102 /* 103 * This command queries the NFS mount daemon for it's mount list and/or 104 * it's exports list and prints them out. 105 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A" 106 * and the "Network File System Protocol XXX.." 107 * for detailed information on the protocol. 108 */ 109 int 110 main(argc, argv) 111 int argc; 112 char **argv; 113 { 114 struct exportslist *exp; 115 struct grouplist *grp; 116 int estat, rpcs = 0, mntvers = 1; 117 char *host; 118 int ch; 119 int len; 120 121 while ((ch = getopt(argc, argv, "ade3")) != -1) 122 switch((char)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 case '?': 144 default: 145 usage(); 146 } 147 argc -= optind; 148 argv += optind; 149 150 if (argc > 0) 151 host = *argv; 152 else 153 host = "localhost"; 154 155 if (rpcs == 0) 156 rpcs = DODUMP; 157 158 if (rpcs & DODUMP) 159 if ((estat = callrpc(host, RPCPROG_MNT, mntvers, 160 RPCMNT_DUMP, xdr_void, (char *)0, 161 xdr_mntdump, (char *)&mntdump)) != 0) { 162 fprintf(stderr, "showmount: Can't do Mountdump rpc: "); 163 clnt_perrno(estat); 164 exit(1); 165 } 166 if (rpcs & DOEXPORTS) 167 if ((estat = callrpc(host, RPCPROG_MNT, mntvers, 168 RPCMNT_EXPORT, xdr_void, (char *)0, 169 xdr_exports, (char *)&exports)) != 0) { 170 fprintf(stderr, "showmount: Can't do Exports rpc: "); 171 clnt_perrno(estat); 172 exit(1); 173 } 174 175 /* Now just print out the results */ 176 if (rpcs & DODUMP) { 177 switch (type) { 178 case ALL: 179 printf("All mount points on %s:\n", host); 180 break; 181 case DIRS: 182 printf("Directories on %s:\n", host); 183 break; 184 default: 185 printf("Hosts on %s:\n", host); 186 break; 187 }; 188 print_dump(mntdump); 189 } 190 if (rpcs & DOEXPORTS) { 191 printf("Exports list on %s:\n", host); 192 exp = exports; 193 while (exp) { 194 len = printf("%-35s", exp->ex_dirp); 195 if (len > 35) 196 printf("\t"); 197 grp = exp->ex_groups; 198 if (grp == NULL) { 199 printf("Everyone\n"); 200 } else { 201 while (grp) { 202 printf("%s ", grp->gr_name); 203 grp = grp->gr_next; 204 } 205 printf("\n"); 206 } 207 exp = exp->ex_next; 208 } 209 } 210 211 exit(0); 212 } 213 214 /* 215 * Xdr routine for retrieving the mount dump list 216 */ 217 int 218 xdr_mntdump(xdrsp, mlp) 219 XDR *xdrsp; 220 struct mountlist **mlp; 221 { 222 struct mountlist *mp, **otp, *tp; 223 int bool, val, val2; 224 char *strp; 225 226 otp = NULL; 227 *mlp = (struct mountlist *)0; 228 if (!xdr_bool(xdrsp, &bool)) 229 return (0); 230 while (bool) { 231 mp = (struct mountlist *)malloc(sizeof(struct mountlist)); 232 if (mp == NULL) 233 return (0); 234 mp->ml_left = mp->ml_right = (struct mountlist *)0; 235 strp = mp->ml_host; 236 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 237 return (0); 238 strp = mp->ml_dirp; 239 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 240 return (0); 241 242 /* 243 * Build a binary tree on sorted order of either host or dirp. 244 * Drop any duplications. 245 */ 246 if (*mlp == NULL) { 247 *mlp = mp; 248 } else { 249 tp = *mlp; 250 while (tp) { 251 val = strcmp(mp->ml_host, tp->ml_host); 252 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 253 switch (type) { 254 case ALL: 255 if (val == 0) { 256 if (val2 == 0) { 257 free((caddr_t)mp); 258 goto next; 259 } 260 val = val2; 261 } 262 break; 263 case DIRS: 264 if (val2 == 0) { 265 free((caddr_t)mp); 266 goto next; 267 } 268 val = val2; 269 break; 270 default: 271 if (val == 0) { 272 free((caddr_t)mp); 273 goto next; 274 } 275 break; 276 }; 277 if (val < 0) { 278 otp = &tp->ml_left; 279 tp = tp->ml_left; 280 } else { 281 otp = &tp->ml_right; 282 tp = tp->ml_right; 283 } 284 } 285 *otp = mp; 286 } 287 next: 288 if (!xdr_bool(xdrsp, &bool)) 289 return (0); 290 } 291 return (1); 292 } 293 294 /* 295 * Xdr routine to retrieve exports list 296 */ 297 int 298 xdr_exports(xdrsp, exp) 299 XDR *xdrsp; 300 struct exportslist **exp; 301 { 302 struct exportslist *ep; 303 struct grouplist *gp; 304 int bool, grpbool; 305 char *strp; 306 307 *exp = (struct exportslist *)0; 308 if (!xdr_bool(xdrsp, &bool)) 309 return (0); 310 while (bool) { 311 ep = (struct exportslist *)malloc(sizeof(struct exportslist)); 312 if (ep == NULL) 313 return (0); 314 ep->ex_groups = (struct grouplist *)0; 315 strp = ep->ex_dirp; 316 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 317 return (0); 318 if (!xdr_bool(xdrsp, &grpbool)) 319 return (0); 320 while (grpbool) { 321 gp = (struct grouplist *)malloc(sizeof(struct grouplist)); 322 if (gp == NULL) 323 return (0); 324 strp = gp->gr_name; 325 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 326 return (0); 327 gp->gr_next = ep->ex_groups; 328 ep->ex_groups = gp; 329 if (!xdr_bool(xdrsp, &grpbool)) 330 return (0); 331 } 332 ep->ex_next = *exp; 333 *exp = ep; 334 if (!xdr_bool(xdrsp, &bool)) 335 return (0); 336 } 337 return (1); 338 } 339 340 void 341 usage() 342 { 343 344 fprintf(stderr, "usage: showmount [-ade3] host\n"); 345 exit(1); 346 } 347 348 /* 349 * Print the binary tree in inorder so that output is sorted. 350 */ 351 void 352 print_dump(mp) 353 struct mountlist *mp; 354 { 355 356 if (mp == NULL) 357 return; 358 if (mp->ml_left) 359 print_dump(mp->ml_left); 360 switch (type) { 361 case ALL: 362 printf("%s:%s\n", mp->ml_host, mp->ml_dirp); 363 break; 364 case DIRS: 365 printf("%s\n", mp->ml_dirp); 366 break; 367 default: 368 printf("%s\n", mp->ml_host); 369 break; 370 }; 371 if (mp->ml_right) 372 print_dump(mp->ml_right); 373 } 374