1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Herb Hasler and 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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved. 37 * @(#)mountd.c 8.15 (Berkeley) 5/1/95 38 * $FreeBSD: src/sbin/mountd/mountd.c,v 1.39.2.5 2002/09/13 15:57:43 joerg Exp $ 39 * $DragonFly: src/sbin/mountd/mountd.c,v 1.3 2003/08/08 04:18:40 dillon Exp $ 40 */ 41 42 #include <sys/param.h> 43 #include <sys/mount.h> 44 #include <sys/stat.h> 45 #include <sys/syslog.h> 46 #include <sys/sysctl.h> 47 48 #include <rpc/rpc.h> 49 #include <rpc/pmap_clnt.h> 50 #include <vfs/nfs/rpcv2.h> 51 #include <vfs/nfs/nfsproto.h> 52 #include <vfs/nfs/nfs.h> 53 #include <vfs/ufs/ufsmount.h> 54 #include <vfs/msdosfs/msdosfsmount.h> 55 #include <vfs/ntfs/ntfsmount.h> 56 #include <vfs/isofs/cd9660/cd9660_mount.h> /* XXX need isofs in include */ 57 58 #include <arpa/inet.h> 59 60 #include <ctype.h> 61 #include <err.h> 62 #include <errno.h> 63 #include <grp.h> 64 #include <netdb.h> 65 #include <pwd.h> 66 #include <signal.h> 67 #include <stdio.h> 68 #include <stdlib.h> 69 #include <string.h> 70 #include <unistd.h> 71 #include "pathnames.h" 72 73 #ifdef DEBUG 74 #include <stdarg.h> 75 #endif 76 77 /* 78 * Structures for keeping the mount list and export list 79 */ 80 struct mountlist { 81 struct mountlist *ml_next; 82 char ml_host[RPCMNT_NAMELEN+1]; 83 char ml_dirp[RPCMNT_PATHLEN+1]; 84 }; 85 86 struct dirlist { 87 struct dirlist *dp_left; 88 struct dirlist *dp_right; 89 int dp_flag; 90 struct hostlist *dp_hosts; /* List of hosts this dir exported to */ 91 char dp_dirp[1]; /* Actually malloc'd to size of dir */ 92 }; 93 /* dp_flag bits */ 94 #define DP_DEFSET 0x1 95 #define DP_HOSTSET 0x2 96 #define DP_KERB 0x4 97 98 struct exportlist { 99 struct exportlist *ex_next; 100 struct dirlist *ex_dirl; 101 struct dirlist *ex_defdir; 102 int ex_flag; 103 fsid_t ex_fs; 104 char *ex_fsdir; 105 char *ex_indexfile; 106 }; 107 /* ex_flag bits */ 108 #define EX_LINKED 0x1 109 110 struct netmsk { 111 u_int32_t nt_net; 112 u_int32_t nt_mask; 113 char *nt_name; 114 }; 115 116 union grouptypes { 117 struct hostent *gt_hostent; 118 struct netmsk gt_net; 119 }; 120 121 struct grouplist { 122 int gr_type; 123 union grouptypes gr_ptr; 124 struct grouplist *gr_next; 125 }; 126 /* Group types */ 127 #define GT_NULL 0x0 128 #define GT_HOST 0x1 129 #define GT_NET 0x2 130 #define GT_IGNORE 0x5 131 132 struct hostlist { 133 int ht_flag; /* Uses DP_xx bits */ 134 struct grouplist *ht_grp; 135 struct hostlist *ht_next; 136 }; 137 138 struct fhreturn { 139 int fhr_flag; 140 int fhr_vers; 141 nfsfh_t fhr_fh; 142 }; 143 144 /* Global defs */ 145 char *add_expdir __P((struct dirlist **, char *, int)); 146 void add_dlist __P((struct dirlist **, struct dirlist *, 147 struct grouplist *, int)); 148 void add_mlist __P((char *, char *)); 149 int check_dirpath __P((char *)); 150 int check_options __P((struct dirlist *)); 151 int chk_host __P((struct dirlist *, u_int32_t, int *, int *)); 152 void del_mlist __P((char *, char *)); 153 struct dirlist *dirp_search __P((struct dirlist *, char *)); 154 int do_mount __P((struct exportlist *, struct grouplist *, int, 155 struct ucred *, char *, int, struct statfs *)); 156 int do_opt __P((char **, char **, struct exportlist *, struct grouplist *, 157 int *, int *, struct ucred *)); 158 struct exportlist *ex_search __P((fsid_t *)); 159 struct exportlist *get_exp __P((void)); 160 void free_dir __P((struct dirlist *)); 161 void free_exp __P((struct exportlist *)); 162 void free_grp __P((struct grouplist *)); 163 void free_host __P((struct hostlist *)); 164 void get_exportlist __P((void)); 165 int get_host __P((char *, struct grouplist *, struct grouplist *)); 166 int get_num __P((char *)); 167 struct hostlist *get_ht __P((void)); 168 int get_line __P((void)); 169 void get_mountlist __P((void)); 170 int get_net __P((char *, struct netmsk *, int)); 171 void getexp_err __P((struct exportlist *, struct grouplist *)); 172 struct grouplist *get_grp __P((void)); 173 void hang_dirp __P((struct dirlist *, struct grouplist *, 174 struct exportlist *, int)); 175 void mntsrv __P((struct svc_req *, SVCXPRT *)); 176 void nextfield __P((char **, char **)); 177 void out_of_mem __P((void)); 178 void parsecred __P((char *, struct ucred *)); 179 int put_exlist __P((struct dirlist *, XDR *, struct dirlist *, int *)); 180 int scan_tree __P((struct dirlist *, u_int32_t)); 181 static void usage __P((void)); 182 int xdr_dir __P((XDR *, char *)); 183 int xdr_explist __P((XDR *, caddr_t)); 184 int xdr_fhs __P((XDR *, caddr_t)); 185 int xdr_mlist __P((XDR *, caddr_t)); 186 187 struct exportlist *exphead; 188 struct mountlist *mlhead; 189 struct grouplist *grphead; 190 char exname[MAXPATHLEN]; 191 struct ucred def_anon = { 192 1, 193 (uid_t) -2, 194 1, 195 { (gid_t) -2 } 196 }; 197 int force_v2 = 0; 198 int resvport_only = 1; 199 int dir_only = 1; 200 int log = 0; 201 int opt_flags; 202 /* Bits for above */ 203 #define OP_MAPROOT 0x01 204 #define OP_MAPALL 0x02 205 #define OP_KERB 0x04 206 #define OP_MASK 0x08 207 #define OP_NET 0x10 208 #define OP_ALLDIRS 0x40 209 /* 0x80 is OP_HAVEMASK in FreeBSD 5+ */ 210 #define OP_QUIET 0x100 211 212 #ifdef DEBUG 213 int debug = 1; 214 void SYSLOG __P((int, const char *, ...)); 215 #define syslog SYSLOG 216 #else 217 int debug = 0; 218 #endif 219 220 /* 221 * Mountd server for NFS mount protocol as described in: 222 * NFS: Network File System Protocol Specification, RFC1094, Appendix A 223 * The optional arguments are the exports file name 224 * default: _PATH_EXPORTS 225 * and "-n" to allow nonroot mount. 226 */ 227 int 228 main(argc, argv) 229 int argc; 230 char **argv; 231 { 232 SVCXPRT *udptransp, *tcptransp; 233 int c, error, mib[3]; 234 struct vfsconf vfc; 235 236 error = getvfsbyname("nfs", &vfc); 237 if (error && vfsisloadable("nfs")) { 238 if(vfsload("nfs")) 239 err(1, "vfsload(nfs)"); 240 endvfsent(); /* flush cache */ 241 error = getvfsbyname("nfs", &vfc); 242 } 243 if (error) 244 errx(1, "NFS support is not available in the running kernel"); 245 246 while ((c = getopt(argc, argv, "2dlnr")) != -1) 247 switch (c) { 248 case '2': 249 force_v2 = 1; 250 break; 251 case 'n': 252 resvport_only = 0; 253 break; 254 case 'r': 255 dir_only = 0; 256 break; 257 case 'd': 258 debug = debug ? 0 : 1; 259 break; 260 case 'l': 261 log = 1; 262 break; 263 default: 264 usage(); 265 }; 266 argc -= optind; 267 argv += optind; 268 grphead = (struct grouplist *)NULL; 269 exphead = (struct exportlist *)NULL; 270 mlhead = (struct mountlist *)NULL; 271 if (argc == 1) { 272 strncpy(exname, *argv, MAXPATHLEN-1); 273 exname[MAXPATHLEN-1] = '\0'; 274 } else 275 strcpy(exname, _PATH_EXPORTS); 276 openlog("mountd", LOG_PID, LOG_DAEMON); 277 if (debug) 278 warnx("getting export list"); 279 get_exportlist(); 280 if (debug) 281 warnx("getting mount list"); 282 get_mountlist(); 283 if (debug) 284 warnx("here we go"); 285 if (debug == 0) { 286 daemon(0, 0); 287 signal(SIGINT, SIG_IGN); 288 signal(SIGQUIT, SIG_IGN); 289 } 290 signal(SIGHUP, (void (*) __P((int))) get_exportlist); 291 { FILE *pidfile = fopen(_PATH_MOUNTDPID, "w"); 292 if (pidfile != NULL) { 293 fprintf(pidfile, "%d\n", getpid()); 294 fclose(pidfile); 295 } 296 } 297 if (!resvport_only) { 298 mib[0] = CTL_VFS; 299 mib[1] = vfc.vfc_typenum; 300 mib[2] = NFS_NFSPRIVPORT; 301 if (sysctl(mib, 3, NULL, NULL, &resvport_only, 302 sizeof(resvport_only)) != 0 && errno != ENOENT) { 303 syslog(LOG_ERR, "sysctl: %m"); 304 exit(1); 305 } 306 } 307 if ((udptransp = svcudp_create(RPC_ANYSOCK)) == NULL || 308 (tcptransp = svctcp_create(RPC_ANYSOCK, 0, 0)) == NULL) { 309 syslog(LOG_ERR, "can't create socket"); 310 exit(1); 311 } 312 pmap_unset(RPCPROG_MNT, 1); 313 pmap_unset(RPCPROG_MNT, 3); 314 if (!force_v2) 315 if (!svc_register(udptransp, RPCPROG_MNT, 3, mntsrv, IPPROTO_UDP) || 316 !svc_register(tcptransp, RPCPROG_MNT, 3, mntsrv, IPPROTO_TCP)) { 317 syslog(LOG_ERR, "can't register mount"); 318 exit(1); 319 } 320 if (!svc_register(udptransp, RPCPROG_MNT, 1, mntsrv, IPPROTO_UDP) || 321 !svc_register(tcptransp, RPCPROG_MNT, 1, mntsrv, IPPROTO_TCP)) { 322 syslog(LOG_ERR, "can't register mount"); 323 exit(1); 324 } 325 svc_run(); 326 syslog(LOG_ERR, "mountd died"); 327 exit(1); 328 } 329 330 static void 331 usage() 332 { 333 fprintf(stderr, 334 "usage: mountd [-2] [-d] [-l] [-n] [-r] [export_file]\n"); 335 exit(1); 336 } 337 338 /* 339 * The mount rpc service 340 */ 341 void 342 mntsrv(rqstp, transp) 343 struct svc_req *rqstp; 344 SVCXPRT *transp; 345 { 346 struct exportlist *ep; 347 struct dirlist *dp; 348 struct fhreturn fhr; 349 struct stat stb; 350 struct statfs fsb; 351 struct hostent *hp; 352 struct in_addr saddrin; 353 u_int32_t saddr; 354 u_short sport; 355 char rpcpath[RPCMNT_PATHLEN + 1], dirpath[MAXPATHLEN]; 356 int bad = 0, defset, hostset; 357 sigset_t sighup_mask; 358 359 sigemptyset(&sighup_mask); 360 sigaddset(&sighup_mask, SIGHUP); 361 saddr = transp->xp_raddr.sin_addr.s_addr; 362 saddrin = transp->xp_raddr.sin_addr; 363 sport = ntohs(transp->xp_raddr.sin_port); 364 hp = (struct hostent *)NULL; 365 switch (rqstp->rq_proc) { 366 case NULLPROC: 367 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL)) 368 syslog(LOG_ERR, "can't send reply"); 369 return; 370 case RPCMNT_MOUNT: 371 if (sport >= IPPORT_RESERVED && resvport_only) { 372 syslog(LOG_NOTICE, 373 "mount request from %s from unprivileged port", 374 inet_ntoa(saddrin)); 375 svcerr_weakauth(transp); 376 return; 377 } 378 if (!svc_getargs(transp, xdr_dir, rpcpath)) { 379 syslog(LOG_NOTICE, "undecodable mount request from %s", 380 inet_ntoa(saddrin)); 381 svcerr_decode(transp); 382 return; 383 } 384 385 /* 386 * Get the real pathname and make sure it is a directory 387 * or a regular file if the -r option was specified 388 * and it exists. 389 */ 390 if (realpath(rpcpath, dirpath) == NULL || 391 stat(dirpath, &stb) < 0 || 392 (!S_ISDIR(stb.st_mode) && 393 (dir_only || !S_ISREG(stb.st_mode))) || 394 statfs(dirpath, &fsb) < 0) { 395 chdir("/"); /* Just in case realpath doesn't */ 396 syslog(LOG_NOTICE, 397 "mount request from %s for non existent path %s", 398 inet_ntoa(saddrin), dirpath); 399 if (debug) 400 warnx("stat failed on %s", dirpath); 401 bad = ENOENT; /* We will send error reply later */ 402 } 403 404 /* Check in the exports list */ 405 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 406 ep = ex_search(&fsb.f_fsid); 407 hostset = defset = 0; 408 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset) || 409 ((dp = dirp_search(ep->ex_dirl, dirpath)) && 410 chk_host(dp, saddr, &defset, &hostset)) || 411 (defset && scan_tree(ep->ex_defdir, saddr) == 0 && 412 scan_tree(ep->ex_dirl, saddr) == 0))) { 413 if (bad) { 414 if (!svc_sendreply(transp, xdr_long, 415 (caddr_t)&bad)) 416 syslog(LOG_ERR, "can't send reply"); 417 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 418 return; 419 } 420 if (hostset & DP_HOSTSET) 421 fhr.fhr_flag = hostset; 422 else 423 fhr.fhr_flag = defset; 424 fhr.fhr_vers = rqstp->rq_vers; 425 /* Get the file handle */ 426 memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t)); 427 if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) { 428 bad = errno; 429 syslog(LOG_ERR, "can't get fh for %s", dirpath); 430 if (!svc_sendreply(transp, xdr_long, 431 (caddr_t)&bad)) 432 syslog(LOG_ERR, "can't send reply"); 433 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 434 return; 435 } 436 if (!svc_sendreply(transp, xdr_fhs, (caddr_t)&fhr)) 437 syslog(LOG_ERR, "can't send reply"); 438 if (hp == NULL) 439 hp = gethostbyaddr((caddr_t)&saddr, 440 sizeof(saddr), AF_INET); 441 if (hp) 442 add_mlist(hp->h_name, dirpath); 443 else 444 add_mlist(inet_ntoa(saddrin), 445 dirpath); 446 if (debug) 447 warnx("mount successful"); 448 if (log) 449 syslog(LOG_NOTICE, 450 "mount request succeeded from %s for %s", 451 inet_ntoa(saddrin), dirpath); 452 } else { 453 bad = EACCES; 454 syslog(LOG_NOTICE, 455 "mount request denied from %s for %s", 456 inet_ntoa(saddrin), dirpath); 457 } 458 459 if (bad && !svc_sendreply(transp, xdr_long, (caddr_t)&bad)) 460 syslog(LOG_ERR, "can't send reply"); 461 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 462 return; 463 case RPCMNT_DUMP: 464 if (!svc_sendreply(transp, xdr_mlist, (caddr_t)NULL)) 465 syslog(LOG_ERR, "can't send reply"); 466 else if (log) 467 syslog(LOG_NOTICE, 468 "dump request succeeded from %s", 469 inet_ntoa(saddrin)); 470 return; 471 case RPCMNT_UMOUNT: 472 if (sport >= IPPORT_RESERVED && resvport_only) { 473 syslog(LOG_NOTICE, 474 "umount request from %s from unprivileged port", 475 inet_ntoa(saddrin)); 476 svcerr_weakauth(transp); 477 return; 478 } 479 if (!svc_getargs(transp, xdr_dir, rpcpath)) { 480 syslog(LOG_NOTICE, "undecodable umount request from %s", 481 inet_ntoa(saddrin)); 482 svcerr_decode(transp); 483 return; 484 } 485 if (realpath(rpcpath, dirpath) == NULL) { 486 syslog(LOG_NOTICE, "umount request from %s " 487 "for non existent path %s", 488 inet_ntoa(saddrin), dirpath); 489 } 490 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL)) 491 syslog(LOG_ERR, "can't send reply"); 492 hp = gethostbyaddr((caddr_t)&saddr, sizeof(saddr), AF_INET); 493 if (hp) 494 del_mlist(hp->h_name, dirpath); 495 del_mlist(inet_ntoa(saddrin), dirpath); 496 if (log) 497 syslog(LOG_NOTICE, 498 "umount request succeeded from %s for %s", 499 inet_ntoa(saddrin), dirpath); 500 return; 501 case RPCMNT_UMNTALL: 502 if (sport >= IPPORT_RESERVED && resvport_only) { 503 syslog(LOG_NOTICE, 504 "umountall request from %s from unprivileged port", 505 inet_ntoa(saddrin)); 506 svcerr_weakauth(transp); 507 return; 508 } 509 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL)) 510 syslog(LOG_ERR, "can't send reply"); 511 hp = gethostbyaddr((caddr_t)&saddr, sizeof(saddr), AF_INET); 512 if (hp) 513 del_mlist(hp->h_name, (char *)NULL); 514 del_mlist(inet_ntoa(saddrin), (char *)NULL); 515 if (log) 516 syslog(LOG_NOTICE, 517 "umountall request succeeded from %s", 518 inet_ntoa(saddrin)); 519 return; 520 case RPCMNT_EXPORT: 521 if (!svc_sendreply(transp, xdr_explist, (caddr_t)NULL)) 522 syslog(LOG_ERR, "can't send reply"); 523 if (log) 524 syslog(LOG_NOTICE, 525 "export request succeeded from %s", 526 inet_ntoa(saddrin)); 527 return; 528 default: 529 svcerr_noproc(transp); 530 return; 531 } 532 } 533 534 /* 535 * Xdr conversion for a dirpath string 536 */ 537 int 538 xdr_dir(xdrsp, dirp) 539 XDR *xdrsp; 540 char *dirp; 541 { 542 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 543 } 544 545 /* 546 * Xdr routine to generate file handle reply 547 */ 548 int 549 xdr_fhs(xdrsp, cp) 550 XDR *xdrsp; 551 caddr_t cp; 552 { 553 register struct fhreturn *fhrp = (struct fhreturn *)cp; 554 u_long ok = 0, len, auth; 555 556 if (!xdr_long(xdrsp, &ok)) 557 return (0); 558 switch (fhrp->fhr_vers) { 559 case 1: 560 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH)); 561 case 3: 562 len = NFSX_V3FH; 563 if (!xdr_long(xdrsp, &len)) 564 return (0); 565 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len)) 566 return (0); 567 if (fhrp->fhr_flag & DP_KERB) 568 auth = RPCAUTH_KERB4; 569 else 570 auth = RPCAUTH_UNIX; 571 len = 1; 572 if (!xdr_long(xdrsp, &len)) 573 return (0); 574 return (xdr_long(xdrsp, &auth)); 575 }; 576 return (0); 577 } 578 579 int 580 xdr_mlist(xdrsp, cp) 581 XDR *xdrsp; 582 caddr_t cp; 583 { 584 struct mountlist *mlp; 585 int true = 1; 586 int false = 0; 587 char *strp; 588 589 mlp = mlhead; 590 while (mlp) { 591 if (!xdr_bool(xdrsp, &true)) 592 return (0); 593 strp = &mlp->ml_host[0]; 594 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 595 return (0); 596 strp = &mlp->ml_dirp[0]; 597 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 598 return (0); 599 mlp = mlp->ml_next; 600 } 601 if (!xdr_bool(xdrsp, &false)) 602 return (0); 603 return (1); 604 } 605 606 /* 607 * Xdr conversion for export list 608 */ 609 int 610 xdr_explist(xdrsp, cp) 611 XDR *xdrsp; 612 caddr_t cp; 613 { 614 struct exportlist *ep; 615 int false = 0; 616 int putdef; 617 sigset_t sighup_mask; 618 619 sigemptyset(&sighup_mask); 620 sigaddset(&sighup_mask, SIGHUP); 621 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 622 ep = exphead; 623 while (ep) { 624 putdef = 0; 625 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, &putdef)) 626 goto errout; 627 if (ep->ex_defdir && putdef == 0 && 628 put_exlist(ep->ex_defdir, xdrsp, (struct dirlist *)NULL, 629 &putdef)) 630 goto errout; 631 ep = ep->ex_next; 632 } 633 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 634 if (!xdr_bool(xdrsp, &false)) 635 return (0); 636 return (1); 637 errout: 638 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 639 return (0); 640 } 641 642 /* 643 * Called from xdr_explist() to traverse the tree and export the 644 * directory paths. 645 */ 646 int 647 put_exlist(dp, xdrsp, adp, putdefp) 648 struct dirlist *dp; 649 XDR *xdrsp; 650 struct dirlist *adp; 651 int *putdefp; 652 { 653 struct grouplist *grp; 654 struct hostlist *hp; 655 int true = 1; 656 int false = 0; 657 int gotalldir = 0; 658 char *strp; 659 660 if (dp) { 661 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp)) 662 return (1); 663 if (!xdr_bool(xdrsp, &true)) 664 return (1); 665 strp = dp->dp_dirp; 666 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 667 return (1); 668 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) { 669 gotalldir = 1; 670 *putdefp = 1; 671 } 672 if ((dp->dp_flag & DP_DEFSET) == 0 && 673 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) { 674 hp = dp->dp_hosts; 675 while (hp) { 676 grp = hp->ht_grp; 677 if (grp->gr_type == GT_HOST) { 678 if (!xdr_bool(xdrsp, &true)) 679 return (1); 680 strp = grp->gr_ptr.gt_hostent->h_name; 681 if (!xdr_string(xdrsp, &strp, 682 RPCMNT_NAMELEN)) 683 return (1); 684 } else if (grp->gr_type == GT_NET) { 685 if (!xdr_bool(xdrsp, &true)) 686 return (1); 687 strp = grp->gr_ptr.gt_net.nt_name; 688 if (!xdr_string(xdrsp, &strp, 689 RPCMNT_NAMELEN)) 690 return (1); 691 } 692 hp = hp->ht_next; 693 if (gotalldir && hp == (struct hostlist *)NULL) { 694 hp = adp->dp_hosts; 695 gotalldir = 0; 696 } 697 } 698 } 699 if (!xdr_bool(xdrsp, &false)) 700 return (1); 701 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp)) 702 return (1); 703 } 704 return (0); 705 } 706 707 #define LINESIZ 10240 708 char line[LINESIZ]; 709 FILE *exp_file; 710 711 /* 712 * Get the export list 713 */ 714 void 715 get_exportlist() 716 { 717 struct exportlist *ep, *ep2; 718 struct grouplist *grp, *tgrp; 719 struct exportlist **epp; 720 struct dirlist *dirhead; 721 struct statfs fsb, *fsp; 722 struct hostent *hpe; 723 struct ucred anon; 724 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc; 725 int len, has_host, exflags, got_nondir, dirplen, num, i, netgrp; 726 727 dirp = NULL; 728 dirplen = 0; 729 730 /* 731 * First, get rid of the old list 732 */ 733 ep = exphead; 734 while (ep) { 735 ep2 = ep; 736 ep = ep->ex_next; 737 free_exp(ep2); 738 } 739 exphead = (struct exportlist *)NULL; 740 741 grp = grphead; 742 while (grp) { 743 tgrp = grp; 744 grp = grp->gr_next; 745 free_grp(tgrp); 746 } 747 grphead = (struct grouplist *)NULL; 748 749 /* 750 * And delete exports that are in the kernel for all local 751 * file systems. 752 * XXX: Should know how to handle all local exportable file systems 753 * instead of just "ufs". 754 */ 755 num = getmntinfo(&fsp, MNT_NOWAIT); 756 for (i = 0; i < num; i++) { 757 union { 758 struct ufs_args ua; 759 struct iso_args ia; 760 struct mfs_args ma; 761 struct msdosfs_args da; 762 struct ntfs_args na; 763 } targs; 764 765 if (!strcmp(fsp->f_fstypename, "mfs") || 766 !strcmp(fsp->f_fstypename, "ufs") || 767 !strcmp(fsp->f_fstypename, "msdos") || 768 !strcmp(fsp->f_fstypename, "ntfs") || 769 !strcmp(fsp->f_fstypename, "cd9660")) { 770 targs.ua.fspec = NULL; 771 targs.ua.export.ex_flags = MNT_DELEXPORT; 772 if (mount(fsp->f_fstypename, fsp->f_mntonname, 773 fsp->f_flags | MNT_UPDATE, 774 (caddr_t)&targs) < 0) 775 syslog(LOG_ERR, "can't delete exports for %s", 776 fsp->f_mntonname); 777 } 778 fsp++; 779 } 780 781 /* 782 * Read in the exports file and build the list, calling 783 * mount() as we go along to push the export rules into the kernel. 784 */ 785 if ((exp_file = fopen(exname, "r")) == NULL) { 786 syslog(LOG_ERR, "can't open %s", exname); 787 exit(2); 788 } 789 dirhead = (struct dirlist *)NULL; 790 while (get_line()) { 791 if (debug) 792 warnx("got line %s", line); 793 cp = line; 794 nextfield(&cp, &endcp); 795 if (*cp == '#') 796 goto nextline; 797 798 /* 799 * Set defaults. 800 */ 801 has_host = FALSE; 802 anon = def_anon; 803 exflags = MNT_EXPORTED; 804 got_nondir = 0; 805 opt_flags = 0; 806 ep = (struct exportlist *)NULL; 807 808 /* 809 * Create new exports list entry 810 */ 811 len = endcp-cp; 812 tgrp = grp = get_grp(); 813 while (len > 0) { 814 if (len > RPCMNT_NAMELEN) { 815 getexp_err(ep, tgrp); 816 goto nextline; 817 } 818 if (*cp == '-') { 819 if (ep == (struct exportlist *)NULL) { 820 getexp_err(ep, tgrp); 821 goto nextline; 822 } 823 if (debug) 824 warnx("doing opt %s", cp); 825 got_nondir = 1; 826 if (do_opt(&cp, &endcp, ep, grp, &has_host, 827 &exflags, &anon)) { 828 getexp_err(ep, tgrp); 829 goto nextline; 830 } 831 } else if (*cp == '/') { 832 savedc = *endcp; 833 *endcp = '\0'; 834 if (check_dirpath(cp) && 835 statfs(cp, &fsb) >= 0) { 836 if (got_nondir) { 837 syslog(LOG_ERR, "dirs must be first"); 838 getexp_err(ep, tgrp); 839 goto nextline; 840 } 841 if (ep) { 842 if (ep->ex_fs.val[0] != fsb.f_fsid.val[0] || 843 ep->ex_fs.val[1] != fsb.f_fsid.val[1]) { 844 getexp_err(ep, tgrp); 845 goto nextline; 846 } 847 } else { 848 /* 849 * See if this directory is already 850 * in the list. 851 */ 852 ep = ex_search(&fsb.f_fsid); 853 if (ep == (struct exportlist *)NULL) { 854 ep = get_exp(); 855 ep->ex_fs = fsb.f_fsid; 856 ep->ex_fsdir = (char *) 857 malloc(strlen(fsb.f_mntonname) + 1); 858 if (ep->ex_fsdir) 859 strcpy(ep->ex_fsdir, 860 fsb.f_mntonname); 861 else 862 out_of_mem(); 863 if (debug) 864 warnx("making new ep fs=0x%x,0x%x", 865 fsb.f_fsid.val[0], 866 fsb.f_fsid.val[1]); 867 } else if (debug) 868 warnx("found ep fs=0x%x,0x%x", 869 fsb.f_fsid.val[0], 870 fsb.f_fsid.val[1]); 871 } 872 873 /* 874 * Add dirpath to export mount point. 875 */ 876 dirp = add_expdir(&dirhead, cp, len); 877 dirplen = len; 878 } else { 879 getexp_err(ep, tgrp); 880 goto nextline; 881 } 882 *endcp = savedc; 883 } else { 884 savedc = *endcp; 885 *endcp = '\0'; 886 got_nondir = 1; 887 if (ep == (struct exportlist *)NULL) { 888 getexp_err(ep, tgrp); 889 goto nextline; 890 } 891 892 /* 893 * Get the host or netgroup. 894 */ 895 setnetgrent(cp); 896 netgrp = getnetgrent(&hst, &usr, &dom); 897 do { 898 if (has_host) { 899 grp->gr_next = get_grp(); 900 grp = grp->gr_next; 901 } 902 if (netgrp) { 903 if (hst == 0) { 904 syslog(LOG_ERR, 905 "null hostname in netgroup %s, skipping", cp); 906 grp->gr_type = GT_IGNORE; 907 } else if (get_host(hst, grp, tgrp)) { 908 syslog(LOG_ERR, 909 "bad host %s in netgroup %s, skipping", hst, cp); 910 grp->gr_type = GT_IGNORE; 911 } 912 } else if (get_host(cp, grp, tgrp)) { 913 syslog(LOG_ERR, "bad host %s, skipping", cp); 914 grp->gr_type = GT_IGNORE; 915 } 916 has_host = TRUE; 917 } while (netgrp && getnetgrent(&hst, &usr, &dom)); 918 endnetgrent(); 919 *endcp = savedc; 920 } 921 cp = endcp; 922 nextfield(&cp, &endcp); 923 len = endcp - cp; 924 } 925 if (check_options(dirhead)) { 926 getexp_err(ep, tgrp); 927 goto nextline; 928 } 929 if (!has_host) { 930 grp->gr_type = GT_HOST; 931 if (debug) 932 warnx("adding a default entry"); 933 /* add a default group and make the grp list NULL */ 934 hpe = (struct hostent *)malloc(sizeof(struct hostent)); 935 if (hpe == (struct hostent *)NULL) 936 out_of_mem(); 937 hpe->h_name = strdup("Default"); 938 hpe->h_addrtype = AF_INET; 939 hpe->h_length = sizeof (u_int32_t); 940 hpe->h_addr_list = (char **)NULL; 941 grp->gr_ptr.gt_hostent = hpe; 942 943 /* 944 * Don't allow a network export coincide with a list of 945 * host(s) on the same line. 946 */ 947 } else if ((opt_flags & OP_NET) && tgrp->gr_next) { 948 getexp_err(ep, tgrp); 949 goto nextline; 950 951 /* 952 * If an export list was specified on this line, make sure 953 * that we have at least one valid entry, otherwise skip it. 954 */ 955 } else { 956 grp = tgrp; 957 while (grp && grp->gr_type == GT_IGNORE) 958 grp = grp->gr_next; 959 if (! grp) { 960 getexp_err(ep, tgrp); 961 goto nextline; 962 } 963 } 964 965 /* 966 * Loop through hosts, pushing the exports into the kernel. 967 * After loop, tgrp points to the start of the list and 968 * grp points to the last entry in the list. 969 */ 970 grp = tgrp; 971 do { 972 if (do_mount(ep, grp, exflags, &anon, dirp, 973 dirplen, &fsb)) { 974 getexp_err(ep, tgrp); 975 goto nextline; 976 } 977 } while (grp->gr_next && (grp = grp->gr_next)); 978 979 /* 980 * Success. Update the data structures. 981 */ 982 if (has_host) { 983 hang_dirp(dirhead, tgrp, ep, opt_flags); 984 grp->gr_next = grphead; 985 grphead = tgrp; 986 } else { 987 hang_dirp(dirhead, (struct grouplist *)NULL, ep, 988 opt_flags); 989 free_grp(grp); 990 } 991 dirhead = (struct dirlist *)NULL; 992 if ((ep->ex_flag & EX_LINKED) == 0) { 993 ep2 = exphead; 994 epp = &exphead; 995 996 /* 997 * Insert in the list in alphabetical order. 998 */ 999 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) { 1000 epp = &ep2->ex_next; 1001 ep2 = ep2->ex_next; 1002 } 1003 if (ep2) 1004 ep->ex_next = ep2; 1005 *epp = ep; 1006 ep->ex_flag |= EX_LINKED; 1007 } 1008 nextline: 1009 if (dirhead) { 1010 free_dir(dirhead); 1011 dirhead = (struct dirlist *)NULL; 1012 } 1013 } 1014 fclose(exp_file); 1015 } 1016 1017 /* 1018 * Allocate an export list element 1019 */ 1020 struct exportlist * 1021 get_exp() 1022 { 1023 struct exportlist *ep; 1024 1025 ep = (struct exportlist *)malloc(sizeof (struct exportlist)); 1026 if (ep == (struct exportlist *)NULL) 1027 out_of_mem(); 1028 memset(ep, 0, sizeof(struct exportlist)); 1029 return (ep); 1030 } 1031 1032 /* 1033 * Allocate a group list element 1034 */ 1035 struct grouplist * 1036 get_grp() 1037 { 1038 struct grouplist *gp; 1039 1040 gp = (struct grouplist *)malloc(sizeof (struct grouplist)); 1041 if (gp == (struct grouplist *)NULL) 1042 out_of_mem(); 1043 memset(gp, 0, sizeof(struct grouplist)); 1044 return (gp); 1045 } 1046 1047 /* 1048 * Clean up upon an error in get_exportlist(). 1049 */ 1050 void 1051 getexp_err(ep, grp) 1052 struct exportlist *ep; 1053 struct grouplist *grp; 1054 { 1055 struct grouplist *tgrp; 1056 1057 if (!(opt_flags & OP_QUIET)) 1058 syslog(LOG_ERR, "bad exports list line %s", line); 1059 if (ep && (ep->ex_flag & EX_LINKED) == 0) 1060 free_exp(ep); 1061 while (grp) { 1062 tgrp = grp; 1063 grp = grp->gr_next; 1064 free_grp(tgrp); 1065 } 1066 } 1067 1068 /* 1069 * Search the export list for a matching fs. 1070 */ 1071 struct exportlist * 1072 ex_search(fsid) 1073 fsid_t *fsid; 1074 { 1075 struct exportlist *ep; 1076 1077 ep = exphead; 1078 while (ep) { 1079 if (ep->ex_fs.val[0] == fsid->val[0] && 1080 ep->ex_fs.val[1] == fsid->val[1]) 1081 return (ep); 1082 ep = ep->ex_next; 1083 } 1084 return (ep); 1085 } 1086 1087 /* 1088 * Add a directory path to the list. 1089 */ 1090 char * 1091 add_expdir(dpp, cp, len) 1092 struct dirlist **dpp; 1093 char *cp; 1094 int len; 1095 { 1096 struct dirlist *dp; 1097 1098 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len); 1099 if (dp == (struct dirlist *)NULL) 1100 out_of_mem(); 1101 dp->dp_left = *dpp; 1102 dp->dp_right = (struct dirlist *)NULL; 1103 dp->dp_flag = 0; 1104 dp->dp_hosts = (struct hostlist *)NULL; 1105 strcpy(dp->dp_dirp, cp); 1106 *dpp = dp; 1107 return (dp->dp_dirp); 1108 } 1109 1110 /* 1111 * Hang the dir list element off the dirpath binary tree as required 1112 * and update the entry for host. 1113 */ 1114 void 1115 hang_dirp(dp, grp, ep, flags) 1116 struct dirlist *dp; 1117 struct grouplist *grp; 1118 struct exportlist *ep; 1119 int flags; 1120 { 1121 struct hostlist *hp; 1122 struct dirlist *dp2; 1123 1124 if (flags & OP_ALLDIRS) { 1125 if (ep->ex_defdir) 1126 free((caddr_t)dp); 1127 else 1128 ep->ex_defdir = dp; 1129 if (grp == (struct grouplist *)NULL) { 1130 ep->ex_defdir->dp_flag |= DP_DEFSET; 1131 if (flags & OP_KERB) 1132 ep->ex_defdir->dp_flag |= DP_KERB; 1133 } else while (grp) { 1134 hp = get_ht(); 1135 if (flags & OP_KERB) 1136 hp->ht_flag |= DP_KERB; 1137 hp->ht_grp = grp; 1138 hp->ht_next = ep->ex_defdir->dp_hosts; 1139 ep->ex_defdir->dp_hosts = hp; 1140 grp = grp->gr_next; 1141 } 1142 } else { 1143 1144 /* 1145 * Loop through the directories adding them to the tree. 1146 */ 1147 while (dp) { 1148 dp2 = dp->dp_left; 1149 add_dlist(&ep->ex_dirl, dp, grp, flags); 1150 dp = dp2; 1151 } 1152 } 1153 } 1154 1155 /* 1156 * Traverse the binary tree either updating a node that is already there 1157 * for the new directory or adding the new node. 1158 */ 1159 void 1160 add_dlist(dpp, newdp, grp, flags) 1161 struct dirlist **dpp; 1162 struct dirlist *newdp; 1163 struct grouplist *grp; 1164 int flags; 1165 { 1166 struct dirlist *dp; 1167 struct hostlist *hp; 1168 int cmp; 1169 1170 dp = *dpp; 1171 if (dp) { 1172 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); 1173 if (cmp > 0) { 1174 add_dlist(&dp->dp_left, newdp, grp, flags); 1175 return; 1176 } else if (cmp < 0) { 1177 add_dlist(&dp->dp_right, newdp, grp, flags); 1178 return; 1179 } else 1180 free((caddr_t)newdp); 1181 } else { 1182 dp = newdp; 1183 dp->dp_left = (struct dirlist *)NULL; 1184 *dpp = dp; 1185 } 1186 if (grp) { 1187 1188 /* 1189 * Hang all of the host(s) off of the directory point. 1190 */ 1191 do { 1192 hp = get_ht(); 1193 if (flags & OP_KERB) 1194 hp->ht_flag |= DP_KERB; 1195 hp->ht_grp = grp; 1196 hp->ht_next = dp->dp_hosts; 1197 dp->dp_hosts = hp; 1198 grp = grp->gr_next; 1199 } while (grp); 1200 } else { 1201 dp->dp_flag |= DP_DEFSET; 1202 if (flags & OP_KERB) 1203 dp->dp_flag |= DP_KERB; 1204 } 1205 } 1206 1207 /* 1208 * Search for a dirpath on the export point. 1209 */ 1210 struct dirlist * 1211 dirp_search(dp, dirpath) 1212 struct dirlist *dp; 1213 char *dirpath; 1214 { 1215 int cmp; 1216 1217 if (dp) { 1218 cmp = strcmp(dp->dp_dirp, dirpath); 1219 if (cmp > 0) 1220 return (dirp_search(dp->dp_left, dirpath)); 1221 else if (cmp < 0) 1222 return (dirp_search(dp->dp_right, dirpath)); 1223 else 1224 return (dp); 1225 } 1226 return (dp); 1227 } 1228 1229 /* 1230 * Scan for a host match in a directory tree. 1231 */ 1232 int 1233 chk_host(dp, saddr, defsetp, hostsetp) 1234 struct dirlist *dp; 1235 u_int32_t saddr; 1236 int *defsetp; 1237 int *hostsetp; 1238 { 1239 struct hostlist *hp; 1240 struct grouplist *grp; 1241 u_int32_t **addrp; 1242 1243 if (dp) { 1244 if (dp->dp_flag & DP_DEFSET) 1245 *defsetp = dp->dp_flag; 1246 hp = dp->dp_hosts; 1247 while (hp) { 1248 grp = hp->ht_grp; 1249 switch (grp->gr_type) { 1250 case GT_HOST: 1251 addrp = (u_int32_t **) 1252 grp->gr_ptr.gt_hostent->h_addr_list; 1253 while (*addrp) { 1254 if (**addrp == saddr) { 1255 *hostsetp = (hp->ht_flag | DP_HOSTSET); 1256 return (1); 1257 } 1258 addrp++; 1259 } 1260 break; 1261 case GT_NET: 1262 if ((saddr & grp->gr_ptr.gt_net.nt_mask) == 1263 grp->gr_ptr.gt_net.nt_net) { 1264 *hostsetp = (hp->ht_flag | DP_HOSTSET); 1265 return (1); 1266 } 1267 break; 1268 }; 1269 hp = hp->ht_next; 1270 } 1271 } 1272 return (0); 1273 } 1274 1275 /* 1276 * Scan tree for a host that matches the address. 1277 */ 1278 int 1279 scan_tree(dp, saddr) 1280 struct dirlist *dp; 1281 u_int32_t saddr; 1282 { 1283 int defset, hostset; 1284 1285 if (dp) { 1286 if (scan_tree(dp->dp_left, saddr)) 1287 return (1); 1288 if (chk_host(dp, saddr, &defset, &hostset)) 1289 return (1); 1290 if (scan_tree(dp->dp_right, saddr)) 1291 return (1); 1292 } 1293 return (0); 1294 } 1295 1296 /* 1297 * Traverse the dirlist tree and free it up. 1298 */ 1299 void 1300 free_dir(dp) 1301 struct dirlist *dp; 1302 { 1303 1304 if (dp) { 1305 free_dir(dp->dp_left); 1306 free_dir(dp->dp_right); 1307 free_host(dp->dp_hosts); 1308 free((caddr_t)dp); 1309 } 1310 } 1311 1312 /* 1313 * Parse the option string and update fields. 1314 * Option arguments may either be -<option>=<value> or 1315 * -<option> <value> 1316 */ 1317 int 1318 do_opt(cpp, endcpp, ep, grp, has_hostp, exflagsp, cr) 1319 char **cpp, **endcpp; 1320 struct exportlist *ep; 1321 struct grouplist *grp; 1322 int *has_hostp; 1323 int *exflagsp; 1324 struct ucred *cr; 1325 { 1326 char *cpoptarg, *cpoptend; 1327 char *cp, *endcp, *cpopt, savedc, savedc2; 1328 int allflag, usedarg; 1329 1330 savedc2 = '\0'; 1331 cpopt = *cpp; 1332 cpopt++; 1333 cp = *endcpp; 1334 savedc = *cp; 1335 *cp = '\0'; 1336 while (cpopt && *cpopt) { 1337 allflag = 1; 1338 usedarg = -2; 1339 if ((cpoptend = strchr(cpopt, ','))) { 1340 *cpoptend++ = '\0'; 1341 if ((cpoptarg = strchr(cpopt, '='))) 1342 *cpoptarg++ = '\0'; 1343 } else { 1344 if ((cpoptarg = strchr(cpopt, '='))) 1345 *cpoptarg++ = '\0'; 1346 else { 1347 *cp = savedc; 1348 nextfield(&cp, &endcp); 1349 **endcpp = '\0'; 1350 if (endcp > cp && *cp != '-') { 1351 cpoptarg = cp; 1352 savedc2 = *endcp; 1353 *endcp = '\0'; 1354 usedarg = 0; 1355 } 1356 } 1357 } 1358 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { 1359 *exflagsp |= MNT_EXRDONLY; 1360 } else if (cpoptarg && (!strcmp(cpopt, "maproot") || 1361 !(allflag = strcmp(cpopt, "mapall")) || 1362 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { 1363 usedarg++; 1364 parsecred(cpoptarg, cr); 1365 if (allflag == 0) { 1366 *exflagsp |= MNT_EXPORTANON; 1367 opt_flags |= OP_MAPALL; 1368 } else 1369 opt_flags |= OP_MAPROOT; 1370 } else if (!strcmp(cpopt, "kerb") || !strcmp(cpopt, "k")) { 1371 *exflagsp |= MNT_EXKERB; 1372 opt_flags |= OP_KERB; 1373 } else if (cpoptarg && (!strcmp(cpopt, "mask") || 1374 !strcmp(cpopt, "m"))) { 1375 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { 1376 syslog(LOG_ERR, "bad mask: %s", cpoptarg); 1377 return (1); 1378 } 1379 usedarg++; 1380 opt_flags |= OP_MASK; 1381 } else if (cpoptarg && (!strcmp(cpopt, "network") || 1382 !strcmp(cpopt, "n"))) { 1383 if (grp->gr_type != GT_NULL) { 1384 syslog(LOG_ERR, "network/host conflict"); 1385 return (1); 1386 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { 1387 syslog(LOG_ERR, "bad net: %s", cpoptarg); 1388 return (1); 1389 } 1390 grp->gr_type = GT_NET; 1391 *has_hostp = 1; 1392 usedarg++; 1393 opt_flags |= OP_NET; 1394 } else if (!strcmp(cpopt, "alldirs")) { 1395 opt_flags |= OP_ALLDIRS; 1396 } else if (!strcmp(cpopt, "public")) { 1397 *exflagsp |= MNT_EXPUBLIC; 1398 } else if (!strcmp(cpopt, "webnfs")) { 1399 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON); 1400 opt_flags |= OP_MAPALL; 1401 } else if (cpoptarg && !strcmp(cpopt, "index")) { 1402 ep->ex_indexfile = strdup(cpoptarg); 1403 } else if (!strcmp(cpopt, "quiet")) { 1404 opt_flags |= OP_QUIET; 1405 } else { 1406 syslog(LOG_ERR, "bad opt %s", cpopt); 1407 return (1); 1408 } 1409 if (usedarg >= 0) { 1410 *endcp = savedc2; 1411 **endcpp = savedc; 1412 if (usedarg > 0) { 1413 *cpp = cp; 1414 *endcpp = endcp; 1415 } 1416 return (0); 1417 } 1418 cpopt = cpoptend; 1419 } 1420 **endcpp = savedc; 1421 return (0); 1422 } 1423 1424 /* 1425 * Translate a character string to the corresponding list of network 1426 * addresses for a hostname. 1427 */ 1428 int 1429 get_host(cp, grp, tgrp) 1430 char *cp; 1431 struct grouplist *grp; 1432 struct grouplist *tgrp; 1433 { 1434 struct grouplist *checkgrp; 1435 struct hostent *hp, *nhp; 1436 char **addrp, **naddrp; 1437 struct hostent t_host; 1438 int i; 1439 u_int32_t saddr; 1440 char *aptr[2]; 1441 1442 if (grp->gr_type != GT_NULL) 1443 return (1); 1444 if ((hp = gethostbyname(cp)) == NULL) { 1445 if (isdigit(*cp)) { 1446 saddr = inet_addr(cp); 1447 if (saddr == -1) { 1448 syslog(LOG_ERR, "inet_addr failed for %s", cp); 1449 return (1); 1450 } 1451 if ((hp = gethostbyaddr((caddr_t)&saddr, sizeof (saddr), 1452 AF_INET)) == NULL) { 1453 hp = &t_host; 1454 hp->h_name = cp; 1455 hp->h_addrtype = AF_INET; 1456 hp->h_length = sizeof (u_int32_t); 1457 hp->h_addr_list = aptr; 1458 aptr[0] = (char *)&saddr; 1459 aptr[1] = (char *)NULL; 1460 } 1461 } else { 1462 syslog(LOG_ERR, "gethostbyname failed for %s", cp); 1463 return (1); 1464 } 1465 } 1466 /* 1467 * Sanity check: make sure we don't already have an entry 1468 * for this host in the grouplist. 1469 */ 1470 checkgrp = tgrp; 1471 while (checkgrp != NULL) { 1472 if (checkgrp->gr_type == GT_HOST && 1473 checkgrp->gr_ptr.gt_hostent != NULL && 1474 (!strcmp(checkgrp->gr_ptr.gt_hostent->h_name, hp->h_name) 1475 || *(u_int32_t *)checkgrp->gr_ptr.gt_hostent->h_addr == 1476 *(u_int32_t *)hp->h_addr)) { 1477 grp->gr_type = GT_IGNORE; 1478 return(0); 1479 } 1480 checkgrp = checkgrp->gr_next; 1481 } 1482 1483 grp->gr_type = GT_HOST; 1484 nhp = grp->gr_ptr.gt_hostent = (struct hostent *) 1485 malloc(sizeof(struct hostent)); 1486 if (nhp == (struct hostent *)NULL) 1487 out_of_mem(); 1488 memmove(nhp, hp, sizeof(struct hostent)); 1489 i = strlen(hp->h_name)+1; 1490 nhp->h_name = (char *)malloc(i); 1491 if (nhp->h_name == (char *)NULL) 1492 out_of_mem(); 1493 memmove(nhp->h_name, hp->h_name, i); 1494 addrp = hp->h_addr_list; 1495 i = 1; 1496 while (*addrp++) 1497 i++; 1498 naddrp = nhp->h_addr_list = (char **)malloc(i*sizeof(char *)); 1499 if (naddrp == (char **)NULL) 1500 out_of_mem(); 1501 addrp = hp->h_addr_list; 1502 while (*addrp) { 1503 *naddrp = (char *)malloc(hp->h_length); 1504 if (*naddrp == (char *)NULL) 1505 out_of_mem(); 1506 memmove(*naddrp, *addrp, hp->h_length); 1507 addrp++; 1508 naddrp++; 1509 } 1510 *naddrp = (char *)NULL; 1511 if (debug) 1512 warnx("got host %s", hp->h_name); 1513 return (0); 1514 } 1515 1516 /* 1517 * Free up an exports list component 1518 */ 1519 void 1520 free_exp(ep) 1521 struct exportlist *ep; 1522 { 1523 1524 if (ep->ex_defdir) { 1525 free_host(ep->ex_defdir->dp_hosts); 1526 free((caddr_t)ep->ex_defdir); 1527 } 1528 if (ep->ex_fsdir) 1529 free(ep->ex_fsdir); 1530 if (ep->ex_indexfile) 1531 free(ep->ex_indexfile); 1532 free_dir(ep->ex_dirl); 1533 free((caddr_t)ep); 1534 } 1535 1536 /* 1537 * Free hosts. 1538 */ 1539 void 1540 free_host(hp) 1541 struct hostlist *hp; 1542 { 1543 struct hostlist *hp2; 1544 1545 while (hp) { 1546 hp2 = hp; 1547 hp = hp->ht_next; 1548 free((caddr_t)hp2); 1549 } 1550 } 1551 1552 struct hostlist * 1553 get_ht() 1554 { 1555 struct hostlist *hp; 1556 1557 hp = (struct hostlist *)malloc(sizeof (struct hostlist)); 1558 if (hp == (struct hostlist *)NULL) 1559 out_of_mem(); 1560 hp->ht_next = (struct hostlist *)NULL; 1561 hp->ht_flag = 0; 1562 return (hp); 1563 } 1564 1565 /* 1566 * Out of memory, fatal 1567 */ 1568 void 1569 out_of_mem() 1570 { 1571 1572 syslog(LOG_ERR, "out of memory"); 1573 exit(2); 1574 } 1575 1576 /* 1577 * Do the mount syscall with the update flag to push the export info into 1578 * the kernel. 1579 */ 1580 int 1581 do_mount(ep, grp, exflags, anoncrp, dirp, dirplen, fsb) 1582 struct exportlist *ep; 1583 struct grouplist *grp; 1584 int exflags; 1585 struct ucred *anoncrp; 1586 char *dirp; 1587 int dirplen; 1588 struct statfs *fsb; 1589 { 1590 struct statfs fsb1; 1591 char *cp = NULL; 1592 u_int32_t **addrp; 1593 int done; 1594 char savedc = '\0'; 1595 struct sockaddr_in sin, imask; 1596 union { 1597 struct ufs_args ua; 1598 struct iso_args ia; 1599 struct mfs_args ma; 1600 #ifdef __NetBSD__ 1601 struct msdosfs_args da; 1602 #endif 1603 struct ntfs_args na; 1604 } args; 1605 u_int32_t net; 1606 1607 args.ua.fspec = 0; 1608 args.ua.export.ex_flags = exflags; 1609 args.ua.export.ex_anon = *anoncrp; 1610 args.ua.export.ex_indexfile = ep->ex_indexfile; 1611 memset(&sin, 0, sizeof(sin)); 1612 memset(&imask, 0, sizeof(imask)); 1613 sin.sin_family = AF_INET; 1614 sin.sin_len = sizeof(sin); 1615 imask.sin_family = AF_INET; 1616 imask.sin_len = sizeof(sin); 1617 if (grp->gr_type == GT_HOST) 1618 addrp = (u_int32_t **)grp->gr_ptr.gt_hostent->h_addr_list; 1619 else 1620 addrp = (u_int32_t **)NULL; 1621 done = FALSE; 1622 while (!done) { 1623 switch (grp->gr_type) { 1624 case GT_HOST: 1625 if (addrp) { 1626 sin.sin_addr.s_addr = **addrp; 1627 args.ua.export.ex_addrlen = sizeof(sin); 1628 } else 1629 args.ua.export.ex_addrlen = 0; 1630 args.ua.export.ex_addr = (struct sockaddr *)&sin; 1631 args.ua.export.ex_masklen = 0; 1632 break; 1633 case GT_NET: 1634 if (grp->gr_ptr.gt_net.nt_mask) 1635 imask.sin_addr.s_addr = grp->gr_ptr.gt_net.nt_mask; 1636 else { 1637 net = ntohl(grp->gr_ptr.gt_net.nt_net); 1638 if (IN_CLASSA(net)) 1639 imask.sin_addr.s_addr = inet_addr("255.0.0.0"); 1640 else if (IN_CLASSB(net)) 1641 imask.sin_addr.s_addr = 1642 inet_addr("255.255.0.0"); 1643 else 1644 imask.sin_addr.s_addr = 1645 inet_addr("255.255.255.0"); 1646 grp->gr_ptr.gt_net.nt_mask = imask.sin_addr.s_addr; 1647 } 1648 sin.sin_addr.s_addr = grp->gr_ptr.gt_net.nt_net; 1649 args.ua.export.ex_addr = (struct sockaddr *)&sin; 1650 args.ua.export.ex_addrlen = sizeof (sin); 1651 args.ua.export.ex_mask = (struct sockaddr *)&imask; 1652 args.ua.export.ex_masklen = sizeof (imask); 1653 break; 1654 case GT_IGNORE: 1655 return(0); 1656 break; 1657 default: 1658 syslog(LOG_ERR, "bad grouptype"); 1659 if (cp) 1660 *cp = savedc; 1661 return (1); 1662 }; 1663 1664 /* 1665 * XXX: 1666 * Maybe I should just use the fsb->f_mntonname path instead 1667 * of looping back up the dirp to the mount point?? 1668 * Also, needs to know how to export all types of local 1669 * exportable file systems and not just "ufs". 1670 */ 1671 while (mount(fsb->f_fstypename, dirp, 1672 fsb->f_flags | MNT_UPDATE, (caddr_t)&args) < 0) { 1673 if (cp) 1674 *cp-- = savedc; 1675 else 1676 cp = dirp + dirplen - 1; 1677 if (opt_flags & OP_QUIET) 1678 return (1); 1679 if (errno == EPERM) { 1680 syslog(LOG_ERR, 1681 "can't change attributes for %s", dirp); 1682 return (1); 1683 } 1684 if (opt_flags & OP_ALLDIRS) { 1685 if (errno == EINVAL) 1686 syslog(LOG_ERR, 1687 "-alldirs requested but %s is not a filesystem mountpoint", 1688 dirp); 1689 else 1690 syslog(LOG_ERR, 1691 "could not remount %s: %m", 1692 dirp); 1693 return (1); 1694 } 1695 /* back up over the last component */ 1696 while (*cp == '/' && cp > dirp) 1697 cp--; 1698 while (*(cp - 1) != '/' && cp > dirp) 1699 cp--; 1700 if (cp == dirp) { 1701 if (debug) 1702 warnx("mnt unsucc"); 1703 syslog(LOG_ERR, "can't export %s", dirp); 1704 return (1); 1705 } 1706 savedc = *cp; 1707 *cp = '\0'; 1708 /* Check that we're still on the same filesystem. */ 1709 if (statfs(dirp, &fsb1) != 0 || bcmp(&fsb1.f_fsid, 1710 &fsb->f_fsid, sizeof(fsb1.f_fsid)) != 0) { 1711 *cp = savedc; 1712 syslog(LOG_ERR, "can't export %s", dirp); 1713 return (1); 1714 } 1715 } 1716 if (addrp) { 1717 ++addrp; 1718 if (*addrp == (u_int32_t *)NULL) 1719 done = TRUE; 1720 } else 1721 done = TRUE; 1722 } 1723 if (cp) 1724 *cp = savedc; 1725 return (0); 1726 } 1727 1728 /* 1729 * Translate a net address. 1730 */ 1731 int 1732 get_net(cp, net, maskflg) 1733 char *cp; 1734 struct netmsk *net; 1735 int maskflg; 1736 { 1737 struct netent *np; 1738 long netaddr; 1739 struct in_addr inetaddr, inetaddr2; 1740 char *name; 1741 1742 if (isdigit(*cp) && ((netaddr = inet_network(cp)) != -1)) { 1743 inetaddr = inet_makeaddr(netaddr, 0); 1744 /* 1745 * Due to arbitrary subnet masks, you don't know how many 1746 * bits to shift the address to make it into a network, 1747 * however you do know how to make a network address into 1748 * a host with host == 0 and then compare them. 1749 * (What a pest) 1750 */ 1751 if (!maskflg) { 1752 setnetent(0); 1753 while ((np = getnetent())) { 1754 inetaddr2 = inet_makeaddr(np->n_net, 0); 1755 if (inetaddr2.s_addr == inetaddr.s_addr) 1756 break; 1757 } 1758 endnetent(); 1759 } 1760 } else if ((np = getnetbyname(cp)) != NULL) { 1761 inetaddr = inet_makeaddr(np->n_net, 0); 1762 } else 1763 return (1); 1764 1765 if (maskflg) 1766 net->nt_mask = inetaddr.s_addr; 1767 else { 1768 if (np) 1769 name = np->n_name; 1770 else 1771 name = inet_ntoa(inetaddr); 1772 net->nt_name = (char *)malloc(strlen(name) + 1); 1773 if (net->nt_name == (char *)NULL) 1774 out_of_mem(); 1775 strcpy(net->nt_name, name); 1776 net->nt_net = inetaddr.s_addr; 1777 } 1778 return (0); 1779 } 1780 1781 /* 1782 * Parse out the next white space separated field 1783 */ 1784 void 1785 nextfield(cp, endcp) 1786 char **cp; 1787 char **endcp; 1788 { 1789 char *p; 1790 1791 p = *cp; 1792 while (*p == ' ' || *p == '\t') 1793 p++; 1794 if (*p == '\n' || *p == '\0') 1795 *cp = *endcp = p; 1796 else { 1797 *cp = p++; 1798 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') 1799 p++; 1800 *endcp = p; 1801 } 1802 } 1803 1804 /* 1805 * Get an exports file line. Skip over blank lines and handle line 1806 * continuations. 1807 */ 1808 int 1809 get_line() 1810 { 1811 char *p, *cp; 1812 int len; 1813 int totlen, cont_line; 1814 1815 /* 1816 * Loop around ignoring blank lines and getting all continuation lines. 1817 */ 1818 p = line; 1819 totlen = 0; 1820 do { 1821 if (fgets(p, LINESIZ - totlen, exp_file) == NULL) 1822 return (0); 1823 len = strlen(p); 1824 cp = p + len - 1; 1825 cont_line = 0; 1826 while (cp >= p && 1827 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) { 1828 if (*cp == '\\') 1829 cont_line = 1; 1830 cp--; 1831 len--; 1832 } 1833 if (cont_line) { 1834 *++cp = ' '; 1835 len++; 1836 } 1837 *++cp = '\0'; 1838 if (len > 0) { 1839 totlen += len; 1840 if (totlen >= LINESIZ) { 1841 syslog(LOG_ERR, "exports line too long"); 1842 exit(2); 1843 } 1844 p = cp; 1845 } 1846 } while (totlen == 0 || cont_line); 1847 return (1); 1848 } 1849 1850 /* 1851 * Parse a description of a credential. 1852 */ 1853 void 1854 parsecred(namelist, cr) 1855 char *namelist; 1856 struct ucred *cr; 1857 { 1858 char *name; 1859 int cnt; 1860 char *names; 1861 struct passwd *pw; 1862 struct group *gr; 1863 int ngroups, groups[NGROUPS + 1]; 1864 1865 /* 1866 * Set up the unprivileged user. 1867 */ 1868 cr->cr_ref = 1; 1869 cr->cr_uid = -2; 1870 cr->cr_groups[0] = -2; 1871 cr->cr_ngroups = 1; 1872 /* 1873 * Get the user's password table entry. 1874 */ 1875 names = strsep(&namelist, " \t\n"); 1876 name = strsep(&names, ":"); 1877 if (isdigit(*name) || *name == '-') 1878 pw = getpwuid(atoi(name)); 1879 else 1880 pw = getpwnam(name); 1881 /* 1882 * Credentials specified as those of a user. 1883 */ 1884 if (names == NULL) { 1885 if (pw == NULL) { 1886 syslog(LOG_ERR, "unknown user: %s", name); 1887 return; 1888 } 1889 cr->cr_uid = pw->pw_uid; 1890 ngroups = NGROUPS + 1; 1891 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) 1892 syslog(LOG_ERR, "too many groups"); 1893 /* 1894 * Convert from int's to gid_t's and compress out duplicate 1895 */ 1896 cr->cr_ngroups = ngroups - 1; 1897 cr->cr_groups[0] = groups[0]; 1898 for (cnt = 2; cnt < ngroups; cnt++) 1899 cr->cr_groups[cnt - 1] = groups[cnt]; 1900 return; 1901 } 1902 /* 1903 * Explicit credential specified as a colon separated list: 1904 * uid:gid:gid:... 1905 */ 1906 if (pw != NULL) 1907 cr->cr_uid = pw->pw_uid; 1908 else if (isdigit(*name) || *name == '-') 1909 cr->cr_uid = atoi(name); 1910 else { 1911 syslog(LOG_ERR, "unknown user: %s", name); 1912 return; 1913 } 1914 cr->cr_ngroups = 0; 1915 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) { 1916 name = strsep(&names, ":"); 1917 if (isdigit(*name) || *name == '-') { 1918 cr->cr_groups[cr->cr_ngroups++] = atoi(name); 1919 } else { 1920 if ((gr = getgrnam(name)) == NULL) { 1921 syslog(LOG_ERR, "unknown group: %s", name); 1922 continue; 1923 } 1924 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid; 1925 } 1926 } 1927 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS) 1928 syslog(LOG_ERR, "too many groups"); 1929 } 1930 1931 #define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50) 1932 /* 1933 * Routines that maintain the remote mounttab 1934 */ 1935 void 1936 get_mountlist() 1937 { 1938 struct mountlist *mlp, **mlpp; 1939 char *host, *dirp, *cp; 1940 char str[STRSIZ]; 1941 FILE *mlfile; 1942 1943 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) { 1944 if (errno == ENOENT) 1945 return; 1946 else { 1947 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST); 1948 return; 1949 } 1950 } 1951 mlpp = &mlhead; 1952 while (fgets(str, STRSIZ, mlfile) != NULL) { 1953 cp = str; 1954 host = strsep(&cp, " \t\n"); 1955 dirp = strsep(&cp, " \t\n"); 1956 if (host == NULL || dirp == NULL) 1957 continue; 1958 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 1959 if (mlp == (struct mountlist *)NULL) 1960 out_of_mem(); 1961 strncpy(mlp->ml_host, host, RPCMNT_NAMELEN); 1962 mlp->ml_host[RPCMNT_NAMELEN] = '\0'; 1963 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN); 1964 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0'; 1965 mlp->ml_next = (struct mountlist *)NULL; 1966 *mlpp = mlp; 1967 mlpp = &mlp->ml_next; 1968 } 1969 fclose(mlfile); 1970 } 1971 1972 void 1973 del_mlist(hostp, dirp) 1974 char *hostp, *dirp; 1975 { 1976 struct mountlist *mlp, **mlpp; 1977 struct mountlist *mlp2; 1978 FILE *mlfile; 1979 int fnd = 0; 1980 1981 mlpp = &mlhead; 1982 mlp = mlhead; 1983 while (mlp) { 1984 if (!strcmp(mlp->ml_host, hostp) && 1985 (!dirp || !strcmp(mlp->ml_dirp, dirp))) { 1986 fnd = 1; 1987 mlp2 = mlp; 1988 *mlpp = mlp = mlp->ml_next; 1989 free((caddr_t)mlp2); 1990 } else { 1991 mlpp = &mlp->ml_next; 1992 mlp = mlp->ml_next; 1993 } 1994 } 1995 if (fnd) { 1996 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) { 1997 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST); 1998 return; 1999 } 2000 mlp = mlhead; 2001 while (mlp) { 2002 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2003 mlp = mlp->ml_next; 2004 } 2005 fclose(mlfile); 2006 } 2007 } 2008 2009 void 2010 add_mlist(hostp, dirp) 2011 char *hostp, *dirp; 2012 { 2013 struct mountlist *mlp, **mlpp; 2014 FILE *mlfile; 2015 2016 mlpp = &mlhead; 2017 mlp = mlhead; 2018 while (mlp) { 2019 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) 2020 return; 2021 mlpp = &mlp->ml_next; 2022 mlp = mlp->ml_next; 2023 } 2024 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2025 if (mlp == (struct mountlist *)NULL) 2026 out_of_mem(); 2027 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN); 2028 mlp->ml_host[RPCMNT_NAMELEN] = '\0'; 2029 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN); 2030 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0'; 2031 mlp->ml_next = (struct mountlist *)NULL; 2032 *mlpp = mlp; 2033 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) { 2034 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST); 2035 return; 2036 } 2037 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2038 fclose(mlfile); 2039 } 2040 2041 /* 2042 * Free up a group list. 2043 */ 2044 void 2045 free_grp(grp) 2046 struct grouplist *grp; 2047 { 2048 char **addrp; 2049 2050 if (grp->gr_type == GT_HOST) { 2051 if (grp->gr_ptr.gt_hostent->h_name) { 2052 addrp = grp->gr_ptr.gt_hostent->h_addr_list; 2053 while (addrp && *addrp) 2054 free(*addrp++); 2055 free((caddr_t)grp->gr_ptr.gt_hostent->h_addr_list); 2056 free(grp->gr_ptr.gt_hostent->h_name); 2057 } 2058 free((caddr_t)grp->gr_ptr.gt_hostent); 2059 } else if (grp->gr_type == GT_NET) { 2060 if (grp->gr_ptr.gt_net.nt_name) 2061 free(grp->gr_ptr.gt_net.nt_name); 2062 } 2063 free((caddr_t)grp); 2064 } 2065 2066 #ifdef DEBUG 2067 void 2068 SYSLOG(int pri, const char *fmt, ...) 2069 { 2070 va_list ap; 2071 2072 va_start(ap, fmt); 2073 vfprintf(stderr, fmt, ap); 2074 va_end(ap); 2075 } 2076 #endif /* DEBUG */ 2077 2078 /* 2079 * Check options for consistency. 2080 */ 2081 int 2082 check_options(dp) 2083 struct dirlist *dp; 2084 { 2085 2086 if (dp == (struct dirlist *)NULL) 2087 return (1); 2088 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL) || 2089 (opt_flags & (OP_MAPROOT | OP_KERB)) == (OP_MAPROOT | OP_KERB) || 2090 (opt_flags & (OP_MAPALL | OP_KERB)) == (OP_MAPALL | OP_KERB)) { 2091 syslog(LOG_ERR, "-mapall, -maproot and -kerb mutually exclusive"); 2092 return (1); 2093 } 2094 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) { 2095 syslog(LOG_ERR, "-mask requires -network"); 2096 return (1); 2097 } 2098 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) { 2099 syslog(LOG_ERR, "-alldirs has multiple directories"); 2100 return (1); 2101 } 2102 return (0); 2103 } 2104 2105 /* 2106 * Check an absolute directory path for any symbolic links. Return true 2107 * if no symbolic links are found. 2108 */ 2109 int 2110 check_dirpath(dirp) 2111 char *dirp; 2112 { 2113 char *cp; 2114 int ret = 1; 2115 struct stat sb; 2116 2117 cp = dirp + 1; 2118 while (*cp && ret) { 2119 if (*cp == '/') { 2120 *cp = '\0'; 2121 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 2122 ret = 0; 2123 *cp = '/'; 2124 } 2125 cp++; 2126 } 2127 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 2128 ret = 0; 2129 return (ret); 2130 } 2131 2132 /* 2133 * Just translate an ascii string to an integer. 2134 */ 2135 int 2136 get_num(cp) 2137 register char *cp; 2138 { 2139 register int res = 0; 2140 2141 while (*cp) { 2142 if (*cp < '0' || *cp > '9') 2143 return (-1); 2144 res = res * 10 + (*cp++ - '0'); 2145 } 2146 return (res); 2147 } 2148