1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * 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 are permitted 9 * provided that the above copyright notice and this paragraph are 10 * duplicated in all such forms and that any documentation, 11 * advertising materials, and other materials related to such 12 * distribution and use acknowledge that the software was developed 13 * by the University of California, Berkeley. The name of the 14 * University may not be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 19 */ 20 21 #ifndef lint 22 char copyright[] = 23 "@(#) Copyright (c) 1989 Regents of the University of California.\n\ 24 All rights reserved.\n"; 25 #endif not lint 26 27 #ifndef lint 28 static char sccsid[] = "@(#)showmount.c 6.3 (Berkeley) 05/15/90"; 29 #endif not lint 30 31 #include <sys/types.h> 32 #include <sys/file.h> 33 #include <sys/socket.h> 34 #include <sys/socketvar.h> 35 #include <netdb.h> 36 #include <rpc/rpc.h> 37 #include <rpc/pmap_clnt.h> 38 #include <rpc/pmap_prot.h> 39 #include <nfs/rpcv2.h> 40 #include <stdio.h> 41 #include <string.h> 42 43 /* Constant defs */ 44 #define ALL 1 45 #define DIRS 2 46 47 #define DODUMP 0x1 48 #define DOEXPORTS 0x2 49 50 struct mountlist { 51 struct mountlist *ml_left; 52 struct mountlist *ml_right; 53 char ml_host[RPCMNT_NAMELEN+1]; 54 char ml_dirp[RPCMNT_PATHLEN+1]; 55 }; 56 57 struct grouplist { 58 struct grouplist *gr_next; 59 char gr_name[RPCMNT_NAMELEN+1]; 60 }; 61 62 struct exportslist { 63 struct exportslist *ex_next; 64 struct grouplist *ex_groups; 65 char ex_dirp[RPCMNT_PATHLEN+1]; 66 }; 67 68 static struct mountlist *mntdump; 69 static struct exportslist *exports; 70 static int type = 0; 71 int xdr_mntdump(), xdr_exports(); 72 73 /* 74 * This command queries the NFS mount daemon for it's mount list and/or 75 * it's exports list and prints them out. 76 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A" 77 * for detailed information on the protocol. 78 */ 79 main(argc, argv) 80 int argc; 81 char **argv; 82 { 83 register struct mountlist *mntp; 84 register struct exportslist *exp; 85 register struct grouplist *grp; 86 extern char *optarg; 87 extern int optind; 88 register int rpcs = 0; 89 char ch; 90 char *host; 91 int estat; 92 93 while ((ch = getopt(argc, argv, "ade")) != EOF) 94 switch((char)ch) { 95 case 'a': 96 if (type == 0) { 97 type = ALL; 98 rpcs |= DODUMP; 99 } else 100 usage(); 101 break; 102 case 'd': 103 if (type == 0) { 104 type = DIRS; 105 rpcs |= DODUMP; 106 } else 107 usage(); 108 break; 109 case 'e': 110 rpcs |= DOEXPORTS; 111 break; 112 case '?': 113 default: 114 usage(); 115 } 116 argc -= optind; 117 argv += optind; 118 119 if (argc > 0) 120 host = *argv; 121 else 122 host = "localhost"; 123 124 if (rpcs == 0) 125 rpcs = DODUMP; 126 127 if (rpcs & DODUMP) 128 if ((estat = callrpc(host, RPCPROG_MNT, RPCMNT_VER1, 129 RPCMNT_DUMP, xdr_void, (char *)0, 130 xdr_mntdump, (char *)&mntdump)) != 0) { 131 clnt_perrno(estat); 132 fprintf(stderr, "Can't do Mountdump rpc\n"); 133 exit(1); 134 } 135 if (rpcs & DOEXPORTS) 136 if ((estat = callrpc(host, RPCPROG_MNT, RPCMNT_VER1, 137 RPCMNT_EXPORT, xdr_void, (char *)0, 138 xdr_exports, (char *)&exports)) != 0) { 139 clnt_perrno(estat); 140 fprintf(stderr, "Can't do Exports rpc\n"); 141 exit(1); 142 } 143 144 /* Now just print out the results */ 145 if (rpcs & DODUMP) { 146 switch (type) { 147 case ALL: 148 printf("All mount points on %s:\n", host); 149 break; 150 case DIRS: 151 printf("Directories on %s:\n", host); 152 break; 153 default: 154 printf("Hosts on %s:\n", host); 155 break; 156 }; 157 print_dump(mntdump); 158 } 159 if (rpcs & DOEXPORTS) { 160 printf("Exports list on %s:\n", host); 161 exp = exports; 162 while (exp) { 163 printf("%-35s", exp->ex_dirp); 164 grp = exp->ex_groups; 165 if (grp == NULL) { 166 printf("Everyone\n"); 167 } else { 168 while (grp) { 169 printf("%s ", grp->gr_name); 170 grp = grp->gr_next; 171 } 172 printf("\n"); 173 } 174 exp = exp->ex_next; 175 } 176 } 177 } 178 179 /* 180 * Xdr routine for retrieving the mount dump list 181 */ 182 xdr_mntdump(xdrsp, mlp) 183 XDR *xdrsp; 184 struct mountlist **mlp; 185 { 186 register struct mountlist *mp; 187 register struct mountlist *tp; 188 register struct mountlist **otp; 189 int val, val2; 190 int bool; 191 char *strp; 192 193 *mlp = (struct mountlist *)0; 194 if (!xdr_bool(xdrsp, &bool)) 195 return (0); 196 while (bool) { 197 mp = (struct mountlist *)malloc(sizeof(struct mountlist)); 198 if (mp == NULL) 199 return (0); 200 mp->ml_left = mp->ml_right = (struct mountlist *)0; 201 strp = mp->ml_host; 202 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 203 return (0); 204 strp = mp->ml_dirp; 205 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 206 return (0); 207 208 /* 209 * Build a binary tree on sorted order of either host or dirp. 210 * Drop any duplications. 211 */ 212 if (*mlp == NULL) { 213 *mlp = mp; 214 } else { 215 tp = *mlp; 216 while (tp) { 217 val = strcmp(mp->ml_host, tp->ml_host); 218 val2 = strcmp(mp->ml_dirp, tp->ml_dirp); 219 switch (type) { 220 case ALL: 221 if (val == 0) { 222 if (val2 == 0) { 223 free((caddr_t)mp); 224 goto next; 225 } 226 val = val2; 227 } 228 break; 229 case DIRS: 230 if (val2 == 0) { 231 free((caddr_t)mp); 232 goto next; 233 } 234 val = val2; 235 break; 236 default: 237 if (val == 0) { 238 free((caddr_t)mp); 239 goto next; 240 } 241 break; 242 }; 243 if (val < 0) { 244 otp = &tp->ml_left; 245 tp = tp->ml_left; 246 } else { 247 otp = &tp->ml_right; 248 tp = tp->ml_right; 249 } 250 } 251 *otp = mp; 252 } 253 next: 254 if (!xdr_bool(xdrsp, &bool)) 255 return (0); 256 } 257 return (1); 258 } 259 260 /* 261 * Xdr routine to retrieve exports list 262 */ 263 xdr_exports(xdrsp, exp) 264 XDR *xdrsp; 265 struct exportslist **exp; 266 { 267 register struct exportslist *ep; 268 register struct grouplist *gp; 269 int bool, grpbool; 270 char *strp; 271 272 *exp = (struct exportslist *)0; 273 if (!xdr_bool(xdrsp, &bool)) 274 return (0); 275 while (bool) { 276 ep = (struct exportslist *)malloc(sizeof(struct exportslist)); 277 if (ep == NULL) 278 return (0); 279 ep->ex_groups = (struct grouplist *)0; 280 strp = ep->ex_dirp; 281 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 282 return (0); 283 if (!xdr_bool(xdrsp, &grpbool)) 284 return (0); 285 while (grpbool) { 286 gp = (struct grouplist *)malloc(sizeof(struct grouplist)); 287 if (gp == NULL) 288 return (0); 289 strp = gp->gr_name; 290 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 291 return (0); 292 gp->gr_next = ep->ex_groups; 293 ep->ex_groups = gp; 294 if (!xdr_bool(xdrsp, &grpbool)) 295 return (0); 296 } 297 ep->ex_next = *exp; 298 *exp = ep; 299 if (!xdr_bool(xdrsp, &bool)) 300 return (0); 301 } 302 return (1); 303 } 304 305 static 306 usage() 307 { 308 fprintf(stderr, "Usage: showmount [-ade] host\n"); 309 exit(1); 310 } 311 312 /* 313 * Print the binary tree in inorder so that output is sorted. 314 */ 315 print_dump(mp) 316 struct mountlist *mp; 317 { 318 319 if (mp == NULL) 320 return; 321 if (mp->ml_left) 322 print_dump(mp->ml_left); 323 switch (type) { 324 case ALL: 325 printf("%s:%s\n", mp->ml_host, mp->ml_dirp); 326 break; 327 case DIRS: 328 printf("%s\n", mp->ml_dirp); 329 break; 330 default: 331 printf("%s\n", mp->ml_host); 332 break; 333 }; 334 if (mp->ml_right) 335 print_dump(mp->ml_right); 336 } 337