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 = 1; 114 const char *host; 115 int ch, estat; 116 117 while ((ch = getopt(argc, argv, "ade3")) != -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 '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, MOUNTPROG, mntvers, 156 MOUNTPROC_DUMP, (xdrproc_t)xdr_void, (char *)0, 157 (xdrproc_t)xdr_mntdump, (char *)&mntdump)) != 0) { 158 clnt_perrno(estat); 159 errx(1, "can't do mountdump rpc"); 160 } 161 if (rpcs & DOEXPORTS) 162 if ((estat = tcp_callrpc(host, MOUNTPROG, mntvers, 163 MOUNTPROC_EXPORT, (xdrproc_t)xdr_void, (char *)0, 164 (xdrproc_t)xdr_exportslist, (char *)&exportslist)) != 0) { 165 clnt_perrno(estat); 166 errx(1, "can't do exports rpc"); 167 } 168 169 /* Now just print out the results */ 170 if (rpcs & DODUMP) { 171 switch (type) { 172 case ALL: 173 printf("All mount points on %s:\n", host); 174 break; 175 case DIRS: 176 printf("Directories on %s:\n", host); 177 break; 178 default: 179 printf("Hosts on %s:\n", host); 180 break; 181 }; 182 print_dump(mntdump); 183 } 184 if (rpcs & DOEXPORTS) { 185 printf("Exports list on %s:\n", host); 186 exp = exportslist; 187 while (exp) { 188 printf("%-34s ", exp->ex_dirp); 189 grp = exp->ex_groups; 190 if (grp == NULL) { 191 printf("Everyone\n"); 192 } else { 193 while (grp) { 194 printf("%s ", grp->gr_name); 195 grp = grp->gr_next; 196 } 197 printf("\n"); 198 } 199 exp = exp->ex_next; 200 } 201 } 202 exit(0); 203 } 204 205 /* 206 * tcp_callrpc has the same interface as callrpc, but tries to 207 * use tcp as transport method in order to handle large replies. 208 */ 209 int 210 tcp_callrpc(const char *host, int prognum, int versnum, int procnum, 211 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out) 212 { 213 CLIENT *client; 214 struct timeval timeout; 215 int rval; 216 217 if ((client = clnt_create(host, prognum, versnum, "tcp")) == NULL && 218 (client = clnt_create(host, prognum, versnum, "udp")) == NULL) 219 return ((int) rpc_createerr.cf_stat); 220 221 timeout.tv_sec = 25; 222 timeout.tv_usec = 0; 223 rval = (int) clnt_call(client, procnum, 224 inproc, in, 225 outproc, out, 226 timeout); 227 clnt_destroy(client); 228 return rval; 229 } 230 231 /* 232 * Xdr routine for retrieving the mount dump list 233 */ 234 int 235 xdr_mntdump(XDR *xdrsp, struct mountlist **mlp) 236 { 237 register struct mountlist *mp; 238 register struct mountlist *tp; 239 register struct mountlist **otp; 240 int val, val2; 241 int bool; 242 char *strp; 243 244 *mlp = (struct mountlist *)0; 245 if (!xdr_bool(xdrsp, &bool)) 246 return (0); 247 while (bool) { 248 mp = (struct mountlist *)malloc(sizeof(struct mountlist)); 249 if (mp == NULL) 250 return (0); 251 mp->ml_left = mp->ml_right = (struct mountlist *)0; 252 strp = mp->ml_host; 253 if (!xdr_string(xdrsp, &strp, MNTNAMLEN)) 254 return (0); 255 strp = mp->ml_dirp; 256 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 257 return (0); 258 259 /* 260 * Build a binary tree on sorted order of either host or dirp. 261 * Drop any duplications. 262 */ 263 if (*mlp == NULL) { 264 *mlp = mp; 265 } else { 266 tp = *mlp; 267 while (tp) { 268 val = strcmp(mp->ml_host, tp->ml_host); 269 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 270 switch (type) { 271 case ALL: 272 if (val == 0) { 273 if (val2 == 0) { 274 free((caddr_t)mp); 275 goto next; 276 } 277 val = val2; 278 } 279 break; 280 case DIRS: 281 if (val2 == 0) { 282 free((caddr_t)mp); 283 goto next; 284 } 285 val = val2; 286 break; 287 default: 288 if (val == 0) { 289 free((caddr_t)mp); 290 goto next; 291 } 292 break; 293 }; 294 if (val < 0) { 295 otp = &tp->ml_left; 296 tp = tp->ml_left; 297 } else { 298 otp = &tp->ml_right; 299 tp = tp->ml_right; 300 } 301 } 302 *otp = mp; 303 } 304 next: 305 if (!xdr_bool(xdrsp, &bool)) 306 return (0); 307 } 308 return (1); 309 } 310 311 /* 312 * Xdr routine to retrieve exports list 313 */ 314 int 315 xdr_exportslist(XDR *xdrsp, struct exportslist **exp) 316 { 317 register struct exportslist *ep; 318 register struct grouplist *gp; 319 int bool, grpbool; 320 char *strp; 321 322 *exp = (struct exportslist *)0; 323 if (!xdr_bool(xdrsp, &bool)) 324 return (0); 325 while (bool) { 326 ep = (struct exportslist *)malloc(sizeof(struct exportslist)); 327 if (ep == NULL) 328 return (0); 329 ep->ex_groups = (struct grouplist *)0; 330 strp = ep->ex_dirp; 331 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 332 return (0); 333 if (!xdr_bool(xdrsp, &grpbool)) 334 return (0); 335 while (grpbool) { 336 gp = (struct grouplist *)malloc(sizeof(struct grouplist)); 337 if (gp == NULL) 338 return (0); 339 strp = gp->gr_name; 340 if (!xdr_string(xdrsp, &strp, MNTNAMLEN)) 341 return (0); 342 gp->gr_next = ep->ex_groups; 343 ep->ex_groups = gp; 344 if (!xdr_bool(xdrsp, &grpbool)) 345 return (0); 346 } 347 ep->ex_next = *exp; 348 *exp = ep; 349 if (!xdr_bool(xdrsp, &bool)) 350 return (0); 351 } 352 return (1); 353 } 354 355 static void 356 usage(void) 357 { 358 fprintf(stderr, "usage: showmount [-a | -d] [-e3] [host]\n"); 359 exit(1); 360 } 361 362 /* 363 * Print the binary tree in inorder so that output is sorted. 364 */ 365 void 366 print_dump(struct mountlist *mp) 367 { 368 369 if (mp == NULL) 370 return; 371 if (mp->ml_left) 372 print_dump(mp->ml_left); 373 switch (type) { 374 case ALL: 375 printf("%s:%s\n", mp->ml_host, mp->ml_dirp); 376 break; 377 case DIRS: 378 printf("%s\n", mp->ml_dirp); 379 break; 380 default: 381 printf("%s\n", mp->ml_host); 382 break; 383 }; 384 if (mp->ml_right) 385 print_dump(mp->ml_right); 386 } 387