1 /* 2 * Copyright (c) 1989, 1993, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1989, 1993, 1995\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #ifndef lint 40 #if 0 41 static char sccsid[] = "@(#)showmount.c 8.3 (Berkeley) 3/29/95"; 42 #endif 43 static const char rcsid[] = 44 "$FreeBSD$"; 45 #endif /* not lint */ 46 47 #include <sys/types.h> 48 #include <sys/queue.h> 49 #include <sys/file.h> 50 #include <sys/socket.h> 51 #include <sys/socketvar.h> 52 53 #include <err.h> 54 #include <netdb.h> 55 #include <rpc/rpc.h> 56 #include <rpc/pmap_clnt.h> 57 #include <rpc/pmap_prot.h> 58 #include <rpcsvc/mount.h> 59 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 /* Constant defs */ 66 #define ALL 1 67 #define DIRS 2 68 69 #define DODUMP 0x1 70 #define DOEXPORTS 0x2 71 72 struct mountlist { 73 struct mountlist *ml_left; 74 struct mountlist *ml_right; 75 char ml_host[MNTNAMLEN+1]; 76 char ml_dirp[MNTPATHLEN+1]; 77 }; 78 79 struct grouplist { 80 struct grouplist *gr_next; 81 char gr_name[MNTNAMLEN+1]; 82 }; 83 84 struct exportslist { 85 struct exportslist *ex_next; 86 struct grouplist *ex_groups; 87 char ex_dirp[MNTPATHLEN+1]; 88 }; 89 90 static struct mountlist *mntdump; 91 static struct exportslist *exportslist; 92 static int type = 0; 93 94 void print_dump(struct mountlist *); 95 static void usage(void); 96 int xdr_mntdump(XDR *, struct mountlist **); 97 int xdr_exportslist(XDR *, struct exportslist **); 98 int tcp_callrpc(const char *host, int prognum, int versnum, int procnum, 99 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out); 100 101 /* 102 * This command queries the NFS mount daemon for it's mount list and/or 103 * it's exports list and prints them out. 104 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A" 105 * and the "Network File System Protocol XXX.." 106 * for detailed information on the protocol. 107 */ 108 int 109 main(int argc, char **argv) 110 { 111 register struct exportslist *exp; 112 register struct grouplist *grp; 113 register int rpcs = 0, mntvers = 3; 114 const char *host; 115 int ch, estat; 116 117 while ((ch = getopt(argc, argv, "ade13")) != -1) 118 switch (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 '1': 137 mntvers = 1; 138 break; 139 case '3': 140 mntvers = 3; 141 break; 142 case '?': 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 (rpcs & DODUMP) 158 if ((estat = tcp_callrpc(host, MOUNTPROG, mntvers, 159 MOUNTPROC_DUMP, (xdrproc_t)xdr_void, (char *)0, 160 (xdrproc_t)xdr_mntdump, (char *)&mntdump)) != 0) { 161 clnt_perrno(estat); 162 errx(1, "can't do mountdump rpc"); 163 } 164 if (rpcs & DOEXPORTS) 165 if ((estat = tcp_callrpc(host, MOUNTPROG, mntvers, 166 MOUNTPROC_EXPORT, (xdrproc_t)xdr_void, (char *)0, 167 (xdrproc_t)xdr_exportslist, (char *)&exportslist)) != 0) { 168 clnt_perrno(estat); 169 errx(1, "can't do exports rpc"); 170 } 171 172 /* Now just print out the results */ 173 if (rpcs & DODUMP) { 174 switch (type) { 175 case ALL: 176 printf("All mount points on %s:\n", host); 177 break; 178 case DIRS: 179 printf("Directories on %s:\n", host); 180 break; 181 default: 182 printf("Hosts on %s:\n", host); 183 break; 184 }; 185 print_dump(mntdump); 186 } 187 if (rpcs & DOEXPORTS) { 188 printf("Exports list on %s:\n", host); 189 exp = exportslist; 190 while (exp) { 191 printf("%-34s ", exp->ex_dirp); 192 grp = exp->ex_groups; 193 if (grp == NULL) { 194 printf("Everyone\n"); 195 } else { 196 while (grp) { 197 printf("%s ", grp->gr_name); 198 grp = grp->gr_next; 199 } 200 printf("\n"); 201 } 202 exp = exp->ex_next; 203 } 204 } 205 exit(0); 206 } 207 208 /* 209 * tcp_callrpc has the same interface as callrpc, but tries to 210 * use tcp as transport method in order to handle large replies. 211 */ 212 int 213 tcp_callrpc(const char *host, int prognum, int versnum, int procnum, 214 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out) 215 { 216 CLIENT *client; 217 struct timeval timeout; 218 int rval; 219 220 if ((client = clnt_create(host, prognum, versnum, "tcp")) == NULL && 221 (client = clnt_create(host, prognum, versnum, "udp")) == NULL) 222 return ((int) rpc_createerr.cf_stat); 223 224 timeout.tv_sec = 25; 225 timeout.tv_usec = 0; 226 rval = (int) clnt_call(client, procnum, 227 inproc, in, 228 outproc, out, 229 timeout); 230 clnt_destroy(client); 231 return rval; 232 } 233 234 /* 235 * Xdr routine for retrieving the mount dump list 236 */ 237 int 238 xdr_mntdump(XDR *xdrsp, struct mountlist **mlp) 239 { 240 register struct mountlist *mp; 241 register struct mountlist *tp; 242 register struct mountlist **otp; 243 int val, val2; 244 int bool; 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, MNTNAMLEN)) 257 return (0); 258 strp = mp->ml_dirp; 259 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 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_exportslist(XDR *xdrsp, struct exportslist **exp) 319 { 320 register struct exportslist *ep; 321 register 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, MNTPATHLEN)) 335 return (0); 336 if (!xdr_bool(xdrsp, &grpbool)) 337 return (0); 338 while (grpbool) { 339 gp = (struct grouplist *)malloc(sizeof(struct grouplist)); 340 if (gp == NULL) 341 return (0); 342 strp = gp->gr_name; 343 if (!xdr_string(xdrsp, &strp, MNTNAMLEN)) 344 return (0); 345 gp->gr_next = ep->ex_groups; 346 ep->ex_groups = gp; 347 if (!xdr_bool(xdrsp, &grpbool)) 348 return (0); 349 } 350 ep->ex_next = *exp; 351 *exp = ep; 352 if (!xdr_bool(xdrsp, &bool)) 353 return (0); 354 } 355 return (1); 356 } 357 358 static void 359 usage(void) 360 { 361 fprintf(stderr, "usage: showmount [-a | -d] [-e3] [host]\n"); 362 exit(1); 363 } 364 365 /* 366 * Print the binary tree in inorder so that output is sorted. 367 */ 368 void 369 print_dump(struct mountlist *mp) 370 { 371 372 if (mp == NULL) 373 return; 374 if (mp->ml_left) 375 print_dump(mp->ml_left); 376 switch (type) { 377 case ALL: 378 printf("%s:%s\n", mp->ml_host, mp->ml_dirp); 379 break; 380 case DIRS: 381 printf("%s\n", mp->ml_dirp); 382 break; 383 default: 384 printf("%s\n", mp->ml_host); 385 break; 386 }; 387 if (mp->ml_right) 388 print_dump(mp->ml_right); 389 } 390