mountd.c revision 37003
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 37#ifndef lint 38static char copyright[] = 39"@(#) Copyright (c) 1989, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41#endif /*not lint*/ 42 43#ifndef lint 44/*static char sccsid[] = "@(#)mountd.c 8.15 (Berkeley) 5/1/95"; */ 45static const char rcsid[] = 46 "$Id: mountd.c,v 1.28 1998/01/20 15:22:27 bde Exp $"; 47#endif /*not lint*/ 48 49#include <sys/param.h> 50#include <sys/file.h> 51#include <sys/ioctl.h> 52#include <sys/mount.h> 53#include <sys/socket.h> 54#include <sys/stat.h> 55#include <sys/syslog.h> 56#include <sys/ucred.h> 57#include <sys/sysctl.h> 58 59#include <rpc/rpc.h> 60#include <rpc/pmap_clnt.h> 61#include <rpc/pmap_prot.h> 62#ifdef ISO 63#include <netiso/iso.h> 64#endif 65#include <nfs/rpcv2.h> 66#include <nfs/nfsproto.h> 67#include <nfs/nfs.h> 68#include <ufs/ufs/ufsmount.h> 69#include <msdosfs/msdosfsmount.h> 70#include <isofs/cd9660/cd9660_mount.h> /* XXX need isofs in include */ 71 72#include <arpa/inet.h> 73 74#include <ctype.h> 75#include <errno.h> 76#include <grp.h> 77#include <netdb.h> 78#include <pwd.h> 79#include <signal.h> 80#include <stdio.h> 81#include <stdlib.h> 82#include <string.h> 83#include <unistd.h> 84#include "pathnames.h" 85 86#ifdef DEBUG 87#include <stdarg.h> 88#endif 89 90/* 91 * Structures for keeping the mount list and export list 92 */ 93struct mountlist { 94 struct mountlist *ml_next; 95 char ml_host[RPCMNT_NAMELEN+1]; 96 char ml_dirp[RPCMNT_PATHLEN+1]; 97}; 98 99struct dirlist { 100 struct dirlist *dp_left; 101 struct dirlist *dp_right; 102 int dp_flag; 103 struct hostlist *dp_hosts; /* List of hosts this dir exported to */ 104 char dp_dirp[1]; /* Actually malloc'd to size of dir */ 105}; 106/* dp_flag bits */ 107#define DP_DEFSET 0x1 108#define DP_HOSTSET 0x2 109#define DP_KERB 0x4 110 111struct exportlist { 112 struct exportlist *ex_next; 113 struct dirlist *ex_dirl; 114 struct dirlist *ex_defdir; 115 int ex_flag; 116 fsid_t ex_fs; 117 char *ex_fsdir; 118 char *ex_indexfile; 119}; 120/* ex_flag bits */ 121#define EX_LINKED 0x1 122 123struct netmsk { 124 u_long nt_net; 125 u_long nt_mask; 126 char *nt_name; 127}; 128 129union grouptypes { 130 struct hostent *gt_hostent; 131 struct netmsk gt_net; 132#ifdef ISO 133 struct sockaddr_iso *gt_isoaddr; 134#endif 135}; 136 137struct grouplist { 138 int gr_type; 139 union grouptypes gr_ptr; 140 struct grouplist *gr_next; 141}; 142/* Group types */ 143#define GT_NULL 0x0 144#define GT_HOST 0x1 145#define GT_NET 0x2 146#define GT_ISO 0x4 147#define GT_IGNORE 0x5 148 149struct hostlist { 150 int ht_flag; /* Uses DP_xx bits */ 151 struct grouplist *ht_grp; 152 struct hostlist *ht_next; 153}; 154 155struct fhreturn { 156 int fhr_flag; 157 int fhr_vers; 158 nfsfh_t fhr_fh; 159}; 160 161/* Global defs */ 162char *add_expdir __P((struct dirlist **, char *, int)); 163void add_dlist __P((struct dirlist **, struct dirlist *, 164 struct grouplist *, int)); 165void add_mlist __P((char *, char *)); 166int check_dirpath __P((char *)); 167int check_options __P((struct dirlist *)); 168int chk_host __P((struct dirlist *, u_long, int *, int *)); 169void del_mlist __P((char *, char *)); 170struct dirlist *dirp_search __P((struct dirlist *, char *)); 171int do_mount __P((struct exportlist *, struct grouplist *, int, 172 struct ucred *, char *, int, struct statfs *)); 173int do_opt __P((char **, char **, struct exportlist *, struct grouplist *, 174 int *, int *, struct ucred *)); 175struct exportlist *ex_search __P((fsid_t *)); 176struct exportlist *get_exp __P((void)); 177void free_dir __P((struct dirlist *)); 178void free_exp __P((struct exportlist *)); 179void free_grp __P((struct grouplist *)); 180void free_host __P((struct hostlist *)); 181void get_exportlist __P((void)); 182int get_host __P((char *, struct grouplist *, struct grouplist *)); 183int get_num __P((char *)); 184struct hostlist *get_ht __P((void)); 185int get_line __P((void)); 186void get_mountlist __P((void)); 187int get_net __P((char *, struct netmsk *, int)); 188void getexp_err __P((struct exportlist *, struct grouplist *)); 189struct grouplist *get_grp __P((void)); 190void hang_dirp __P((struct dirlist *, struct grouplist *, 191 struct exportlist *, int)); 192void mntsrv __P((struct svc_req *, SVCXPRT *)); 193void nextfield __P((char **, char **)); 194void out_of_mem __P((void)); 195void parsecred __P((char *, struct ucred *)); 196int put_exlist __P((struct dirlist *, XDR *, struct dirlist *, int *)); 197int scan_tree __P((struct dirlist *, u_long)); 198void send_umntall __P((void)); 199int umntall_each __P((caddr_t, struct sockaddr_in *)); 200int xdr_dir __P((XDR *, char *)); 201int xdr_explist __P((XDR *, caddr_t)); 202int xdr_fhs __P((XDR *, caddr_t)); 203int xdr_mlist __P((XDR *, caddr_t)); 204 205/* C library */ 206int getnetgrent(); 207void endnetgrent(); 208void setnetgrent(); 209 210#ifdef ISO 211struct iso_addr *iso_addr(); 212#endif 213 214struct exportlist *exphead; 215struct mountlist *mlhead; 216struct grouplist *grphead; 217char exname[MAXPATHLEN]; 218struct ucred def_anon = { 219 1, 220 (uid_t) -2, 221 1, 222 { (gid_t) -2 } 223}; 224int force_v2 = 0; 225int resvport_only = 1; 226int dir_only = 1; 227int log = 0; 228int opt_flags; 229/* Bits for above */ 230#define OP_MAPROOT 0x01 231#define OP_MAPALL 0x02 232#define OP_KERB 0x04 233#define OP_MASK 0x08 234#define OP_NET 0x10 235#define OP_ISO 0x20 236#define OP_ALLDIRS 0x40 237 238#ifdef DEBUG 239int debug = 1; 240void SYSLOG __P((int, const char *, ...)); 241#define syslog SYSLOG 242#else 243int debug = 0; 244#endif 245 246/* 247 * Mountd server for NFS mount protocol as described in: 248 * NFS: Network File System Protocol Specification, RFC1094, Appendix A 249 * The optional arguments are the exports file name 250 * default: _PATH_EXPORTS 251 * and "-n" to allow nonroot mount. 252 */ 253int 254main(argc, argv) 255 int argc; 256 char **argv; 257{ 258 SVCXPRT *udptransp, *tcptransp; 259 int c, error, mib[3]; 260 struct vfsconf vfc; 261 262 error = getvfsbyname("nfs", &vfc); 263 if (error && vfsisloadable("nfs")) { 264 if(vfsload("nfs")) 265 err(1, "vfsload(nfs)"); 266 endvfsent(); /* flush cache */ 267 error = getvfsbyname("nfs", &vfc); 268 } 269 if (error) 270 errx(1, "NFS support is not available in the running kernel"); 271 272 while ((c = getopt(argc, argv, "2dlnr")) != -1) 273 switch (c) { 274 case '2': 275 force_v2 = 1; 276 break; 277 case 'n': 278 resvport_only = 0; 279 break; 280 case 'r': 281 dir_only = 0; 282 break; 283 case 'd': 284 debug = debug ? 0 : 1; 285 break; 286 case 'l': 287 log = 1; 288 break; 289 default: 290 fprintf(stderr, 291"Usage: mountd [-d] [-l] [-r] [-n] [export_file]\n"); 292 exit(1); 293 }; 294 argc -= optind; 295 argv += optind; 296 grphead = (struct grouplist *)NULL; 297 exphead = (struct exportlist *)NULL; 298 mlhead = (struct mountlist *)NULL; 299 if (argc == 1) { 300 strncpy(exname, *argv, MAXPATHLEN-1); 301 exname[MAXPATHLEN-1] = '\0'; 302 } else 303 strcpy(exname, _PATH_EXPORTS); 304 openlog("mountd", LOG_PID, LOG_DAEMON); 305 if (debug) 306 fprintf(stderr,"Getting export list.\n"); 307 get_exportlist(); 308 if (debug) 309 fprintf(stderr,"Getting mount list.\n"); 310 get_mountlist(); 311 if (debug) 312 fprintf(stderr,"Here we go.\n"); 313 if (debug == 0) { 314 daemon(0, 0); 315 signal(SIGINT, SIG_IGN); 316 signal(SIGQUIT, SIG_IGN); 317 } 318 signal(SIGHUP, (void (*) __P((int))) get_exportlist); 319 signal(SIGTERM, (void (*) __P((int))) send_umntall); 320 { FILE *pidfile = fopen(_PATH_MOUNTDPID, "w"); 321 if (pidfile != NULL) { 322 fprintf(pidfile, "%d\n", getpid()); 323 fclose(pidfile); 324 } 325 } 326 if (!resvport_only) { 327 mib[0] = CTL_VFS; 328 mib[1] = vfc.vfc_typenum; 329 mib[2] = NFS_NFSPRIVPORT; 330 if (sysctl(mib, 3, NULL, NULL, &resvport_only, 331 sizeof(resvport_only)) != 0 && errno != ENOENT) { 332 syslog(LOG_ERR, "sysctl: %m"); 333 exit(1); 334 } 335 } 336 if ((udptransp = svcudp_create(RPC_ANYSOCK)) == NULL || 337 (tcptransp = svctcp_create(RPC_ANYSOCK, 0, 0)) == NULL) { 338 syslog(LOG_ERR, "Can't create socket"); 339 exit(1); 340 } 341 pmap_unset(RPCPROG_MNT, 1); 342 pmap_unset(RPCPROG_MNT, 3); 343 if (!force_v2) 344 if (!svc_register(udptransp, RPCPROG_MNT, 3, mntsrv, IPPROTO_UDP) || 345 !svc_register(tcptransp, RPCPROG_MNT, 3, mntsrv, IPPROTO_TCP)) { 346 syslog(LOG_ERR, "Can't register mount"); 347 exit(1); 348 } 349 if (!svc_register(udptransp, RPCPROG_MNT, 1, mntsrv, IPPROTO_UDP) || 350 !svc_register(tcptransp, RPCPROG_MNT, 1, mntsrv, IPPROTO_TCP)) { 351 syslog(LOG_ERR, "Can't register mount"); 352 exit(1); 353 } 354 svc_run(); 355 syslog(LOG_ERR, "Mountd died"); 356 exit(1); 357} 358 359/* 360 * The mount rpc service 361 */ 362void 363mntsrv(rqstp, transp) 364 struct svc_req *rqstp; 365 SVCXPRT *transp; 366{ 367 struct exportlist *ep; 368 struct dirlist *dp; 369 struct fhreturn fhr; 370 struct stat stb; 371 struct statfs fsb; 372 struct hostent *hp; 373 struct in_addr saddrin; 374 u_long saddr; 375 u_short sport; 376 char rpcpath[RPCMNT_PATHLEN + 1], dirpath[MAXPATHLEN]; 377 int bad = 0, defset, hostset; 378 sigset_t sighup_mask; 379 380 sigemptyset(&sighup_mask); 381 sigaddset(&sighup_mask, SIGHUP); 382 saddr = transp->xp_raddr.sin_addr.s_addr; 383 saddrin = transp->xp_raddr.sin_addr; 384 sport = ntohs(transp->xp_raddr.sin_port); 385 hp = (struct hostent *)NULL; 386 switch (rqstp->rq_proc) { 387 case NULLPROC: 388 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL)) 389 syslog(LOG_ERR, "Can't send reply"); 390 return; 391 case RPCMNT_MOUNT: 392 if (sport >= IPPORT_RESERVED && resvport_only) { 393 syslog(LOG_NOTICE, 394 "mount request from %s from unprivileged port", 395 inet_ntoa(saddrin)); 396 svcerr_weakauth(transp); 397 return; 398 } 399 if (!svc_getargs(transp, xdr_dir, rpcpath)) { 400 syslog(LOG_NOTICE, "undecodable mount request from %s", 401 inet_ntoa(saddrin)); 402 svcerr_decode(transp); 403 return; 404 } 405 406 /* 407 * Get the real pathname and make sure it is a directory 408 * or a regular file if the -r option was specified 409 * and it exists. 410 */ 411 if (realpath(rpcpath, dirpath) == 0 || 412 stat(dirpath, &stb) < 0 || 413 (!S_ISDIR(stb.st_mode) && 414 (dir_only || !S_ISREG(stb.st_mode))) || 415 statfs(dirpath, &fsb) < 0) { 416 chdir("/"); /* Just in case realpath doesn't */ 417 syslog(LOG_NOTICE, 418 "mount request from %s for non existant path %s", 419 inet_ntoa(saddrin), dirpath); 420 if (debug) 421 fprintf(stderr, "stat failed on %s\n", dirpath); 422 bad = ENOENT; /* We will send error reply later */ 423 } 424 425 /* Check in the exports list */ 426 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 427 ep = ex_search(&fsb.f_fsid); 428 hostset = defset = 0; 429 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset) || 430 ((dp = dirp_search(ep->ex_dirl, dirpath)) && 431 chk_host(dp, saddr, &defset, &hostset)) || 432 (defset && scan_tree(ep->ex_defdir, saddr) == 0 && 433 scan_tree(ep->ex_dirl, saddr) == 0))) { 434 if (bad) { 435 if (!svc_sendreply(transp, xdr_long, 436 (caddr_t)&bad)) 437 syslog(LOG_ERR, "Can't send reply"); 438 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 439 return; 440 } 441 if (hostset & DP_HOSTSET) 442 fhr.fhr_flag = hostset; 443 else 444 fhr.fhr_flag = defset; 445 fhr.fhr_vers = rqstp->rq_vers; 446 /* Get the file handle */ 447 memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t)); 448 if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) { 449 bad = errno; 450 syslog(LOG_ERR, "Can't get fh for %s", dirpath); 451 if (!svc_sendreply(transp, xdr_long, 452 (caddr_t)&bad)) 453 syslog(LOG_ERR, "Can't send reply"); 454 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 455 return; 456 } 457 if (!svc_sendreply(transp, xdr_fhs, (caddr_t)&fhr)) 458 syslog(LOG_ERR, "Can't send reply"); 459 if (hp == NULL) 460 hp = gethostbyaddr((caddr_t)&saddr, 461 sizeof(saddr), AF_INET); 462 if (hp) 463 add_mlist(hp->h_name, dirpath); 464 else 465 add_mlist(inet_ntoa(saddrin), 466 dirpath); 467 if (debug) 468 fprintf(stderr,"Mount successfull.\n"); 469 if (log) 470 syslog(LOG_NOTICE, 471 "mount request succeeded from %s for %s", 472 inet_ntoa(saddrin), dirpath); 473 } else { 474 bad = EACCES; 475 syslog(LOG_NOTICE, 476 "mount request denied from %s for %s", 477 inet_ntoa(saddrin), dirpath); 478 } 479 480 if (bad && !svc_sendreply(transp, xdr_long, (caddr_t)&bad)) 481 syslog(LOG_ERR, "Can't send reply"); 482 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 483 return; 484 case RPCMNT_DUMP: 485 if (!svc_sendreply(transp, xdr_mlist, (caddr_t)NULL)) 486 syslog(LOG_ERR, "Can't send reply"); 487 else if (log) 488 syslog(LOG_NOTICE, 489 "dump request succeeded from %s", 490 inet_ntoa(saddrin), dirpath); 491 return; 492 case RPCMNT_UMOUNT: 493 if (sport >= IPPORT_RESERVED && resvport_only) { 494 syslog(LOG_NOTICE, 495 "umount request from %s from unprivileged port", 496 inet_ntoa(saddrin)); 497 svcerr_weakauth(transp); 498 return; 499 } 500 if (!svc_getargs(transp, xdr_dir, dirpath)) { 501 syslog(LOG_NOTICE, "undecodable umount request from %s", 502 inet_ntoa(saddrin)); 503 svcerr_decode(transp); 504 return; 505 } 506 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL)) 507 syslog(LOG_ERR, "Can't send reply"); 508 hp = gethostbyaddr((caddr_t)&saddr, sizeof(saddr), AF_INET); 509 if (hp) 510 del_mlist(hp->h_name, dirpath); 511 del_mlist(inet_ntoa(saddrin), dirpath); 512 if (log) 513 syslog(LOG_NOTICE, 514 "umount request succeeded from %s for %s", 515 inet_ntoa(saddrin), dirpath); 516 return; 517 case RPCMNT_UMNTALL: 518 if (sport >= IPPORT_RESERVED && resvport_only) { 519 syslog(LOG_NOTICE, 520 "umountall request from %s from unprivileged port", 521 inet_ntoa(saddrin)); 522 svcerr_weakauth(transp); 523 return; 524 } 525 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL)) 526 syslog(LOG_ERR, "Can't send reply"); 527 hp = gethostbyaddr((caddr_t)&saddr, sizeof(saddr), AF_INET); 528 if (hp) 529 del_mlist(hp->h_name, (char *)NULL); 530 del_mlist(inet_ntoa(saddrin), (char *)NULL); 531 if (log) 532 syslog(LOG_NOTICE, 533 "umountall request succeeded from %s", 534 inet_ntoa(saddrin)); 535 return; 536 case RPCMNT_EXPORT: 537 if (!svc_sendreply(transp, xdr_explist, (caddr_t)NULL)) 538 syslog(LOG_ERR, "Can't send reply"); 539 if (log) 540 syslog(LOG_NOTICE, 541 "export request succeeded from %s", 542 inet_ntoa(saddrin)); 543 return; 544 default: 545 svcerr_noproc(transp); 546 return; 547 } 548} 549 550/* 551 * Xdr conversion for a dirpath string 552 */ 553int 554xdr_dir(xdrsp, dirp) 555 XDR *xdrsp; 556 char *dirp; 557{ 558 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 559} 560 561/* 562 * Xdr routine to generate file handle reply 563 */ 564int 565xdr_fhs(xdrsp, cp) 566 XDR *xdrsp; 567 caddr_t cp; 568{ 569 register struct fhreturn *fhrp = (struct fhreturn *)cp; 570 u_long ok = 0, len, auth; 571 572 if (!xdr_long(xdrsp, &ok)) 573 return (0); 574 switch (fhrp->fhr_vers) { 575 case 1: 576 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH)); 577 case 3: 578 len = NFSX_V3FH; 579 if (!xdr_long(xdrsp, &len)) 580 return (0); 581 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len)) 582 return (0); 583 if (fhrp->fhr_flag & DP_KERB) 584 auth = RPCAUTH_KERB4; 585 else 586 auth = RPCAUTH_UNIX; 587 len = 1; 588 if (!xdr_long(xdrsp, &len)) 589 return (0); 590 return (xdr_long(xdrsp, &auth)); 591 }; 592 return (0); 593} 594 595int 596xdr_mlist(xdrsp, cp) 597 XDR *xdrsp; 598 caddr_t cp; 599{ 600 struct mountlist *mlp; 601 int true = 1; 602 int false = 0; 603 char *strp; 604 605 mlp = mlhead; 606 while (mlp) { 607 if (!xdr_bool(xdrsp, &true)) 608 return (0); 609 strp = &mlp->ml_host[0]; 610 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 611 return (0); 612 strp = &mlp->ml_dirp[0]; 613 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 614 return (0); 615 mlp = mlp->ml_next; 616 } 617 if (!xdr_bool(xdrsp, &false)) 618 return (0); 619 return (1); 620} 621 622/* 623 * Xdr conversion for export list 624 */ 625int 626xdr_explist(xdrsp, cp) 627 XDR *xdrsp; 628 caddr_t cp; 629{ 630 struct exportlist *ep; 631 int false = 0; 632 int putdef; 633 sigset_t sighup_mask; 634 635 sigemptyset(&sighup_mask); 636 sigaddset(&sighup_mask, SIGHUP); 637 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 638 ep = exphead; 639 while (ep) { 640 putdef = 0; 641 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, &putdef)) 642 goto errout; 643 if (ep->ex_defdir && putdef == 0 && 644 put_exlist(ep->ex_defdir, xdrsp, (struct dirlist *)NULL, 645 &putdef)) 646 goto errout; 647 ep = ep->ex_next; 648 } 649 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 650 if (!xdr_bool(xdrsp, &false)) 651 return (0); 652 return (1); 653errout: 654 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 655 return (0); 656} 657 658/* 659 * Called from xdr_explist() to traverse the tree and export the 660 * directory paths. 661 */ 662int 663put_exlist(dp, xdrsp, adp, putdefp) 664 struct dirlist *dp; 665 XDR *xdrsp; 666 struct dirlist *adp; 667 int *putdefp; 668{ 669 struct grouplist *grp; 670 struct hostlist *hp; 671 int true = 1; 672 int false = 0; 673 int gotalldir = 0; 674 char *strp; 675 676 if (dp) { 677 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp)) 678 return (1); 679 if (!xdr_bool(xdrsp, &true)) 680 return (1); 681 strp = dp->dp_dirp; 682 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 683 return (1); 684 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) { 685 gotalldir = 1; 686 *putdefp = 1; 687 } 688 if ((dp->dp_flag & DP_DEFSET) == 0 && 689 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) { 690 hp = dp->dp_hosts; 691 while (hp) { 692 grp = hp->ht_grp; 693 if (grp->gr_type == GT_HOST) { 694 if (!xdr_bool(xdrsp, &true)) 695 return (1); 696 strp = grp->gr_ptr.gt_hostent->h_name; 697 if (!xdr_string(xdrsp, &strp, 698 RPCMNT_NAMELEN)) 699 return (1); 700 } else if (grp->gr_type == GT_NET) { 701 if (!xdr_bool(xdrsp, &true)) 702 return (1); 703 strp = grp->gr_ptr.gt_net.nt_name; 704 if (!xdr_string(xdrsp, &strp, 705 RPCMNT_NAMELEN)) 706 return (1); 707 } 708 hp = hp->ht_next; 709 if (gotalldir && hp == (struct hostlist *)NULL) { 710 hp = adp->dp_hosts; 711 gotalldir = 0; 712 } 713 } 714 } 715 if (!xdr_bool(xdrsp, &false)) 716 return (1); 717 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp)) 718 return (1); 719 } 720 return (0); 721} 722 723#define LINESIZ 10240 724char line[LINESIZ]; 725FILE *exp_file; 726 727/* 728 * Get the export list 729 */ 730void 731get_exportlist() 732{ 733 struct exportlist *ep, *ep2; 734 struct grouplist *grp, *tgrp; 735 struct exportlist **epp; 736 struct dirlist *dirhead; 737 struct statfs fsb, *fsp; 738 struct hostent *hpe; 739 struct ucred anon; 740 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc; 741 int len, has_host, exflags, got_nondir, dirplen, num, i, netgrp; 742 743 /* 744 * First, get rid of the old list 745 */ 746 ep = exphead; 747 while (ep) { 748 ep2 = ep; 749 ep = ep->ex_next; 750 free_exp(ep2); 751 } 752 exphead = (struct exportlist *)NULL; 753 754 grp = grphead; 755 while (grp) { 756 tgrp = grp; 757 grp = grp->gr_next; 758 free_grp(tgrp); 759 } 760 grphead = (struct grouplist *)NULL; 761 762 /* 763 * And delete exports that are in the kernel for all local 764 * file systems. 765 * XXX: Should know how to handle all local exportable file systems 766 * instead of just "ufs". 767 */ 768 num = getmntinfo(&fsp, MNT_NOWAIT); 769 for (i = 0; i < num; i++) { 770 union { 771 struct ufs_args ua; 772 struct iso_args ia; 773 struct mfs_args ma; 774 struct msdosfs_args da; 775 } targs; 776 777 if (!strcmp(fsp->f_fstypename, "mfs") || 778 !strcmp(fsp->f_fstypename, "ufs") || 779 !strcmp(fsp->f_fstypename, "msdos") || 780 !strcmp(fsp->f_fstypename, "cd9660")) { 781 targs.ua.fspec = NULL; 782 targs.ua.export.ex_flags = MNT_DELEXPORT; 783 if (mount(fsp->f_fstypename, fsp->f_mntonname, 784 fsp->f_flags | MNT_UPDATE, 785 (caddr_t)&targs) < 0) 786 syslog(LOG_ERR, "Can't delete exports for %s", 787 fsp->f_mntonname); 788 } 789 fsp++; 790 } 791 792 /* 793 * Read in the exports file and build the list, calling 794 * mount() as we go along to push the export rules into the kernel. 795 */ 796 if ((exp_file = fopen(exname, "r")) == NULL) { 797 syslog(LOG_ERR, "Can't open %s", exname); 798 exit(2); 799 } 800 dirhead = (struct dirlist *)NULL; 801 while (get_line()) { 802 if (debug) 803 fprintf(stderr,"Got line %s\n",line); 804 cp = line; 805 nextfield(&cp, &endcp); 806 if (*cp == '#') 807 goto nextline; 808 809 /* 810 * Set defaults. 811 */ 812 has_host = FALSE; 813 anon = def_anon; 814 exflags = MNT_EXPORTED; 815 got_nondir = 0; 816 opt_flags = 0; 817 ep = (struct exportlist *)NULL; 818 819 /* 820 * Create new exports list entry 821 */ 822 len = endcp-cp; 823 tgrp = grp = get_grp(); 824 while (len > 0) { 825 if (len > RPCMNT_NAMELEN) { 826 getexp_err(ep, tgrp); 827 goto nextline; 828 } 829 if (*cp == '-') { 830 if (ep == (struct exportlist *)NULL) { 831 getexp_err(ep, tgrp); 832 goto nextline; 833 } 834 if (debug) 835 fprintf(stderr, "doing opt %s\n", cp); 836 got_nondir = 1; 837 if (do_opt(&cp, &endcp, ep, grp, &has_host, 838 &exflags, &anon)) { 839 getexp_err(ep, tgrp); 840 goto nextline; 841 } 842 } else if (*cp == '/') { 843 savedc = *endcp; 844 *endcp = '\0'; 845 if (check_dirpath(cp) && 846 statfs(cp, &fsb) >= 0) { 847 if (got_nondir) { 848 syslog(LOG_ERR, "Dirs must be first"); 849 getexp_err(ep, tgrp); 850 goto nextline; 851 } 852 if (ep) { 853 if (ep->ex_fs.val[0] != fsb.f_fsid.val[0] || 854 ep->ex_fs.val[1] != fsb.f_fsid.val[1]) { 855 getexp_err(ep, tgrp); 856 goto nextline; 857 } 858 } else { 859 /* 860 * See if this directory is already 861 * in the list. 862 */ 863 ep = ex_search(&fsb.f_fsid); 864 if (ep == (struct exportlist *)NULL) { 865 ep = get_exp(); 866 ep->ex_fs = fsb.f_fsid; 867 ep->ex_fsdir = (char *) 868 malloc(strlen(fsb.f_mntonname) + 1); 869 if (ep->ex_fsdir) 870 strcpy(ep->ex_fsdir, 871 fsb.f_mntonname); 872 else 873 out_of_mem(); 874 if (debug) 875 fprintf(stderr, 876 "Making new ep fs=0x%x,0x%x\n", 877 fsb.f_fsid.val[0], 878 fsb.f_fsid.val[1]); 879 } else if (debug) 880 fprintf(stderr, 881 "Found ep fs=0x%x,0x%x\n", 882 fsb.f_fsid.val[0], 883 fsb.f_fsid.val[1]); 884 } 885 886 /* 887 * Add dirpath to export mount point. 888 */ 889 dirp = add_expdir(&dirhead, cp, len); 890 dirplen = len; 891 } else { 892 getexp_err(ep, tgrp); 893 goto nextline; 894 } 895 *endcp = savedc; 896 } else { 897 savedc = *endcp; 898 *endcp = '\0'; 899 got_nondir = 1; 900 if (ep == (struct exportlist *)NULL) { 901 getexp_err(ep, tgrp); 902 goto nextline; 903 } 904 905 /* 906 * Get the host or netgroup. 907 */ 908 setnetgrent(cp); 909 netgrp = getnetgrent(&hst, &usr, &dom); 910 do { 911 if (has_host) { 912 grp->gr_next = get_grp(); 913 grp = grp->gr_next; 914 } 915 if (netgrp) { 916 if (hst == 0) { 917 syslog(LOG_ERR, "Null hostname in netgroup %s, skipping", cp); 918 } else if (get_host(hst, grp, tgrp)) { 919 syslog(LOG_ERR, "Bad host %s in netgroup %s, skipping", hst, cp); 920 grp->gr_type = GT_IGNORE; 921 } 922 } else if (get_host(cp, grp, tgrp)) { 923 syslog(LOG_ERR, "Bad host %s, skipping", cp); 924 grp->gr_type = GT_IGNORE; 925 } 926 has_host = TRUE; 927 } while (netgrp && getnetgrent(&hst, &usr, &dom)); 928 endnetgrent(); 929 *endcp = savedc; 930 } 931 cp = endcp; 932 nextfield(&cp, &endcp); 933 len = endcp - cp; 934 } 935 if (check_options(dirhead)) { 936 getexp_err(ep, tgrp); 937 goto nextline; 938 } 939 if (!has_host) { 940 grp->gr_type = GT_HOST; 941 if (debug) 942 fprintf(stderr,"Adding a default entry\n"); 943 /* add a default group and make the grp list NULL */ 944 hpe = (struct hostent *)malloc(sizeof(struct hostent)); 945 if (hpe == (struct hostent *)NULL) 946 out_of_mem(); 947 hpe->h_name = strdup("Default"); 948 hpe->h_addrtype = AF_INET; 949 hpe->h_length = sizeof (u_long); 950 hpe->h_addr_list = (char **)NULL; 951 grp->gr_ptr.gt_hostent = hpe; 952 953 /* 954 * Don't allow a network export coincide with a list of 955 * host(s) on the same line. 956 */ 957 } else if ((opt_flags & OP_NET) && tgrp->gr_next) { 958 getexp_err(ep, tgrp); 959 goto nextline; 960 961 /* 962 * If an export list was specified on this line, make sure 963 * that we have at least one valid entry, otherwise skip it. 964 */ 965 } else { 966 grp = tgrp; 967 while (grp && grp->gr_type == GT_IGNORE) 968 grp = grp->gr_next; 969 if (! grp) { 970 getexp_err(ep, tgrp); 971 goto nextline; 972 } 973 } 974 975 /* 976 * Loop through hosts, pushing the exports into the kernel. 977 * After loop, tgrp points to the start of the list and 978 * grp points to the last entry in the list. 979 */ 980 grp = tgrp; 981 do { 982 if (do_mount(ep, grp, exflags, &anon, dirp, 983 dirplen, &fsb)) { 984 getexp_err(ep, tgrp); 985 goto nextline; 986 } 987 } while (grp->gr_next && (grp = grp->gr_next)); 988 989 /* 990 * Success. Update the data structures. 991 */ 992 if (has_host) { 993 hang_dirp(dirhead, tgrp, ep, opt_flags); 994 grp->gr_next = grphead; 995 grphead = tgrp; 996 } else { 997 hang_dirp(dirhead, (struct grouplist *)NULL, ep, 998 opt_flags); 999 free_grp(grp); 1000 } 1001 dirhead = (struct dirlist *)NULL; 1002 if ((ep->ex_flag & EX_LINKED) == 0) { 1003 ep2 = exphead; 1004 epp = &exphead; 1005 1006 /* 1007 * Insert in the list in alphabetical order. 1008 */ 1009 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) { 1010 epp = &ep2->ex_next; 1011 ep2 = ep2->ex_next; 1012 } 1013 if (ep2) 1014 ep->ex_next = ep2; 1015 *epp = ep; 1016 ep->ex_flag |= EX_LINKED; 1017 } 1018nextline: 1019 if (dirhead) { 1020 free_dir(dirhead); 1021 dirhead = (struct dirlist *)NULL; 1022 } 1023 } 1024 fclose(exp_file); 1025} 1026 1027/* 1028 * Allocate an export list element 1029 */ 1030struct exportlist * 1031get_exp() 1032{ 1033 struct exportlist *ep; 1034 1035 ep = (struct exportlist *)malloc(sizeof (struct exportlist)); 1036 if (ep == (struct exportlist *)NULL) 1037 out_of_mem(); 1038 memset(ep, 0, sizeof(struct exportlist)); 1039 return (ep); 1040} 1041 1042/* 1043 * Allocate a group list element 1044 */ 1045struct grouplist * 1046get_grp() 1047{ 1048 struct grouplist *gp; 1049 1050 gp = (struct grouplist *)malloc(sizeof (struct grouplist)); 1051 if (gp == (struct grouplist *)NULL) 1052 out_of_mem(); 1053 memset(gp, 0, sizeof(struct grouplist)); 1054 return (gp); 1055} 1056 1057/* 1058 * Clean up upon an error in get_exportlist(). 1059 */ 1060void 1061getexp_err(ep, grp) 1062 struct exportlist *ep; 1063 struct grouplist *grp; 1064{ 1065 struct grouplist *tgrp; 1066 1067 syslog(LOG_ERR, "Bad exports list line %s", line); 1068 if (ep && (ep->ex_flag & EX_LINKED) == 0) 1069 free_exp(ep); 1070 while (grp) { 1071 tgrp = grp; 1072 grp = grp->gr_next; 1073 free_grp(tgrp); 1074 } 1075} 1076 1077/* 1078 * Search the export list for a matching fs. 1079 */ 1080struct exportlist * 1081ex_search(fsid) 1082 fsid_t *fsid; 1083{ 1084 struct exportlist *ep; 1085 1086 ep = exphead; 1087 while (ep) { 1088 if (ep->ex_fs.val[0] == fsid->val[0] && 1089 ep->ex_fs.val[1] == fsid->val[1]) 1090 return (ep); 1091 ep = ep->ex_next; 1092 } 1093 return (ep); 1094} 1095 1096/* 1097 * Add a directory path to the list. 1098 */ 1099char * 1100add_expdir(dpp, cp, len) 1101 struct dirlist **dpp; 1102 char *cp; 1103 int len; 1104{ 1105 struct dirlist *dp; 1106 1107 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len); 1108 dp->dp_left = *dpp; 1109 dp->dp_right = (struct dirlist *)NULL; 1110 dp->dp_flag = 0; 1111 dp->dp_hosts = (struct hostlist *)NULL; 1112 strcpy(dp->dp_dirp, cp); 1113 *dpp = dp; 1114 return (dp->dp_dirp); 1115} 1116 1117/* 1118 * Hang the dir list element off the dirpath binary tree as required 1119 * and update the entry for host. 1120 */ 1121void 1122hang_dirp(dp, grp, ep, flags) 1123 struct dirlist *dp; 1124 struct grouplist *grp; 1125 struct exportlist *ep; 1126 int flags; 1127{ 1128 struct hostlist *hp; 1129 struct dirlist *dp2; 1130 1131 if (flags & OP_ALLDIRS) { 1132 if (ep->ex_defdir) 1133 free((caddr_t)dp); 1134 else 1135 ep->ex_defdir = dp; 1136 if (grp == (struct grouplist *)NULL) { 1137 ep->ex_defdir->dp_flag |= DP_DEFSET; 1138 if (flags & OP_KERB) 1139 ep->ex_defdir->dp_flag |= DP_KERB; 1140 } else while (grp) { 1141 hp = get_ht(); 1142 if (flags & OP_KERB) 1143 hp->ht_flag |= DP_KERB; 1144 hp->ht_grp = grp; 1145 hp->ht_next = ep->ex_defdir->dp_hosts; 1146 ep->ex_defdir->dp_hosts = hp; 1147 grp = grp->gr_next; 1148 } 1149 } else { 1150 1151 /* 1152 * Loop throught the directories adding them to the tree. 1153 */ 1154 while (dp) { 1155 dp2 = dp->dp_left; 1156 add_dlist(&ep->ex_dirl, dp, grp, flags); 1157 dp = dp2; 1158 } 1159 } 1160} 1161 1162/* 1163 * Traverse the binary tree either updating a node that is already there 1164 * for the new directory or adding the new node. 1165 */ 1166void 1167add_dlist(dpp, newdp, grp, flags) 1168 struct dirlist **dpp; 1169 struct dirlist *newdp; 1170 struct grouplist *grp; 1171 int flags; 1172{ 1173 struct dirlist *dp; 1174 struct hostlist *hp; 1175 int cmp; 1176 1177 dp = *dpp; 1178 if (dp) { 1179 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); 1180 if (cmp > 0) { 1181 add_dlist(&dp->dp_left, newdp, grp, flags); 1182 return; 1183 } else if (cmp < 0) { 1184 add_dlist(&dp->dp_right, newdp, grp, flags); 1185 return; 1186 } else 1187 free((caddr_t)newdp); 1188 } else { 1189 dp = newdp; 1190 dp->dp_left = (struct dirlist *)NULL; 1191 *dpp = dp; 1192 } 1193 if (grp) { 1194 1195 /* 1196 * Hang all of the host(s) off of the directory point. 1197 */ 1198 do { 1199 hp = get_ht(); 1200 if (flags & OP_KERB) 1201 hp->ht_flag |= DP_KERB; 1202 hp->ht_grp = grp; 1203 hp->ht_next = dp->dp_hosts; 1204 dp->dp_hosts = hp; 1205 grp = grp->gr_next; 1206 } while (grp); 1207 } else { 1208 dp->dp_flag |= DP_DEFSET; 1209 if (flags & OP_KERB) 1210 dp->dp_flag |= DP_KERB; 1211 } 1212} 1213 1214/* 1215 * Search for a dirpath on the export point. 1216 */ 1217struct dirlist * 1218dirp_search(dp, dirpath) 1219 struct dirlist *dp; 1220 char *dirpath; 1221{ 1222 int cmp; 1223 1224 if (dp) { 1225 cmp = strcmp(dp->dp_dirp, dirpath); 1226 if (cmp > 0) 1227 return (dirp_search(dp->dp_left, dirpath)); 1228 else if (cmp < 0) 1229 return (dirp_search(dp->dp_right, dirpath)); 1230 else 1231 return (dp); 1232 } 1233 return (dp); 1234} 1235 1236/* 1237 * Scan for a host match in a directory tree. 1238 */ 1239int 1240chk_host(dp, saddr, defsetp, hostsetp) 1241 struct dirlist *dp; 1242 u_long saddr; 1243 int *defsetp; 1244 int *hostsetp; 1245{ 1246 struct hostlist *hp; 1247 struct grouplist *grp; 1248 u_long **addrp; 1249 1250 if (dp) { 1251 if (dp->dp_flag & DP_DEFSET) 1252 *defsetp = dp->dp_flag; 1253 hp = dp->dp_hosts; 1254 while (hp) { 1255 grp = hp->ht_grp; 1256 switch (grp->gr_type) { 1257 case GT_HOST: 1258 addrp = (u_long **) 1259 grp->gr_ptr.gt_hostent->h_addr_list; 1260 while (*addrp) { 1261 if (**addrp == saddr) { 1262 *hostsetp = (hp->ht_flag | DP_HOSTSET); 1263 return (1); 1264 } 1265 addrp++; 1266 } 1267 break; 1268 case GT_NET: 1269 if ((saddr & grp->gr_ptr.gt_net.nt_mask) == 1270 grp->gr_ptr.gt_net.nt_net) { 1271 *hostsetp = (hp->ht_flag | DP_HOSTSET); 1272 return (1); 1273 } 1274 break; 1275 }; 1276 hp = hp->ht_next; 1277 } 1278 } 1279 return (0); 1280} 1281 1282/* 1283 * Scan tree for a host that matches the address. 1284 */ 1285int 1286scan_tree(dp, saddr) 1287 struct dirlist *dp; 1288 u_long saddr; 1289{ 1290 int defset, hostset; 1291 1292 if (dp) { 1293 if (scan_tree(dp->dp_left, saddr)) 1294 return (1); 1295 if (chk_host(dp, saddr, &defset, &hostset)) 1296 return (1); 1297 if (scan_tree(dp->dp_right, saddr)) 1298 return (1); 1299 } 1300 return (0); 1301} 1302 1303/* 1304 * Traverse the dirlist tree and free it up. 1305 */ 1306void 1307free_dir(dp) 1308 struct dirlist *dp; 1309{ 1310 1311 if (dp) { 1312 free_dir(dp->dp_left); 1313 free_dir(dp->dp_right); 1314 free_host(dp->dp_hosts); 1315 free((caddr_t)dp); 1316 } 1317} 1318 1319/* 1320 * Parse the option string and update fields. 1321 * Option arguments may either be -<option>=<value> or 1322 * -<option> <value> 1323 */ 1324int 1325do_opt(cpp, endcpp, ep, grp, has_hostp, exflagsp, cr) 1326 char **cpp, **endcpp; 1327 struct exportlist *ep; 1328 struct grouplist *grp; 1329 int *has_hostp; 1330 int *exflagsp; 1331 struct ucred *cr; 1332{ 1333 char *cpoptarg, *cpoptend; 1334 char *cp, *endcp, *cpopt, savedc, savedc2; 1335 int allflag, usedarg; 1336 1337 cpopt = *cpp; 1338 cpopt++; 1339 cp = *endcpp; 1340 savedc = *cp; 1341 *cp = '\0'; 1342 while (cpopt && *cpopt) { 1343 allflag = 1; 1344 usedarg = -2; 1345 if (cpoptend = strchr(cpopt, ',')) { 1346 *cpoptend++ = '\0'; 1347 if (cpoptarg = strchr(cpopt, '=')) 1348 *cpoptarg++ = '\0'; 1349 } else { 1350 if (cpoptarg = strchr(cpopt, '=')) 1351 *cpoptarg++ = '\0'; 1352 else { 1353 *cp = savedc; 1354 nextfield(&cp, &endcp); 1355 **endcpp = '\0'; 1356 if (endcp > cp && *cp != '-') { 1357 cpoptarg = cp; 1358 savedc2 = *endcp; 1359 *endcp = '\0'; 1360 usedarg = 0; 1361 } 1362 } 1363 } 1364 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { 1365 *exflagsp |= MNT_EXRDONLY; 1366 } else if (cpoptarg && (!strcmp(cpopt, "maproot") || 1367 !(allflag = strcmp(cpopt, "mapall")) || 1368 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { 1369 usedarg++; 1370 parsecred(cpoptarg, cr); 1371 if (allflag == 0) { 1372 *exflagsp |= MNT_EXPORTANON; 1373 opt_flags |= OP_MAPALL; 1374 } else 1375 opt_flags |= OP_MAPROOT; 1376 } else if (!strcmp(cpopt, "kerb") || !strcmp(cpopt, "k")) { 1377 *exflagsp |= MNT_EXKERB; 1378 opt_flags |= OP_KERB; 1379 } else if (cpoptarg && (!strcmp(cpopt, "mask") || 1380 !strcmp(cpopt, "m"))) { 1381 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { 1382 syslog(LOG_ERR, "Bad mask: %s", cpoptarg); 1383 return (1); 1384 } 1385 usedarg++; 1386 opt_flags |= OP_MASK; 1387 } else if (cpoptarg && (!strcmp(cpopt, "network") || 1388 !strcmp(cpopt, "n"))) { 1389 if (grp->gr_type != GT_NULL) { 1390 syslog(LOG_ERR, "Network/host conflict"); 1391 return (1); 1392 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { 1393 syslog(LOG_ERR, "Bad net: %s", cpoptarg); 1394 return (1); 1395 } 1396 grp->gr_type = GT_NET; 1397 *has_hostp = 1; 1398 usedarg++; 1399 opt_flags |= OP_NET; 1400 } else if (!strcmp(cpopt, "alldirs")) { 1401 opt_flags |= OP_ALLDIRS; 1402 } else if (!strcmp(cpopt, "public")) { 1403 *exflagsp |= MNT_EXPUBLIC; 1404 } else if (!strcmp(cpopt, "webnfs")) { 1405 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON); 1406 opt_flags |= OP_MAPALL; 1407 } else if (cpoptarg && !strcmp(cpopt, "index")) { 1408 ep->ex_indexfile = strdup(cpoptarg); 1409#ifdef ISO 1410 } else if (cpoptarg && !strcmp(cpopt, "iso")) { 1411 if (get_isoaddr(cpoptarg, grp)) { 1412 syslog(LOG_ERR, "Bad iso addr: %s", cpoptarg); 1413 return (1); 1414 } 1415 *has_hostp = 1; 1416 usedarg++; 1417 opt_flags |= OP_ISO; 1418#endif /* ISO */ 1419 } else { 1420 syslog(LOG_ERR, "Bad opt %s", cpopt); 1421 return (1); 1422 } 1423 if (usedarg >= 0) { 1424 *endcp = savedc2; 1425 **endcpp = savedc; 1426 if (usedarg > 0) { 1427 *cpp = cp; 1428 *endcpp = endcp; 1429 } 1430 return (0); 1431 } 1432 cpopt = cpoptend; 1433 } 1434 **endcpp = savedc; 1435 return (0); 1436} 1437 1438/* 1439 * Translate a character string to the corresponding list of network 1440 * addresses for a hostname. 1441 */ 1442int 1443get_host(cp, grp, tgrp) 1444 char *cp; 1445 struct grouplist *grp; 1446 struct grouplist *tgrp; 1447{ 1448 struct grouplist *checkgrp; 1449 struct hostent *hp, *nhp; 1450 char **addrp, **naddrp; 1451 struct hostent t_host; 1452 int i; 1453 u_long saddr; 1454 char *aptr[2]; 1455 1456 if (grp->gr_type != GT_NULL) 1457 return (1); 1458 if ((hp = gethostbyname(cp)) == NULL) { 1459 if (isdigit(*cp)) { 1460 saddr = inet_addr(cp); 1461 if (saddr == -1) { 1462 syslog(LOG_ERR, "Inet_addr failed for %s", cp); 1463 return (1); 1464 } 1465 if ((hp = gethostbyaddr((caddr_t)&saddr, sizeof (saddr), 1466 AF_INET)) == NULL) { 1467 hp = &t_host; 1468 hp->h_name = cp; 1469 hp->h_addrtype = AF_INET; 1470 hp->h_length = sizeof (u_long); 1471 hp->h_addr_list = aptr; 1472 aptr[0] = (char *)&saddr; 1473 aptr[1] = (char *)NULL; 1474 } 1475 } else { 1476 syslog(LOG_ERR, "Gethostbyname failed for %s", cp); 1477 return (1); 1478 } 1479 } 1480 /* 1481 * Sanity check: make sure we don't already have an entry 1482 * for this host in the grouplist. 1483 */ 1484 checkgrp = tgrp; 1485 while (checkgrp) { 1486 if (checkgrp->gr_type == GT_HOST && 1487 checkgrp->gr_ptr.gt_hostent != NULL && 1488 !strcmp(checkgrp->gr_ptr.gt_hostent->h_name, hp->h_name)) { 1489 grp->gr_type = GT_IGNORE; 1490 return(0); 1491 } 1492 checkgrp = checkgrp->gr_next; 1493 } 1494 1495 grp->gr_type = GT_HOST; 1496 nhp = grp->gr_ptr.gt_hostent = (struct hostent *) 1497 malloc(sizeof(struct hostent)); 1498 if (nhp == (struct hostent *)NULL) 1499 out_of_mem(); 1500 memmove(nhp, hp, sizeof(struct hostent)); 1501 i = strlen(hp->h_name)+1; 1502 nhp->h_name = (char *)malloc(i); 1503 if (nhp->h_name == (char *)NULL) 1504 out_of_mem(); 1505 memmove(nhp->h_name, hp->h_name, i); 1506 addrp = hp->h_addr_list; 1507 i = 1; 1508 while (*addrp++) 1509 i++; 1510 naddrp = nhp->h_addr_list = (char **) 1511 malloc(i*sizeof(char *)); 1512 if (naddrp == (char **)NULL) 1513 out_of_mem(); 1514 addrp = hp->h_addr_list; 1515 while (*addrp) { 1516 *naddrp = (char *) 1517 malloc(hp->h_length); 1518 if (*naddrp == (char *)NULL) 1519 out_of_mem(); 1520 memmove(*naddrp, *addrp, hp->h_length); 1521 addrp++; 1522 naddrp++; 1523 } 1524 *naddrp = (char *)NULL; 1525 if (debug) 1526 fprintf(stderr, "got host %s\n", hp->h_name); 1527 return (0); 1528} 1529 1530/* 1531 * Free up an exports list component 1532 */ 1533void 1534free_exp(ep) 1535 struct exportlist *ep; 1536{ 1537 1538 if (ep->ex_defdir) { 1539 free_host(ep->ex_defdir->dp_hosts); 1540 free((caddr_t)ep->ex_defdir); 1541 } 1542 if (ep->ex_fsdir) 1543 free(ep->ex_fsdir); 1544 if (ep->ex_indexfile) 1545 free(ep->ex_indexfile); 1546 free_dir(ep->ex_dirl); 1547 free((caddr_t)ep); 1548} 1549 1550/* 1551 * Free hosts. 1552 */ 1553void 1554free_host(hp) 1555 struct hostlist *hp; 1556{ 1557 struct hostlist *hp2; 1558 1559 while (hp) { 1560 hp2 = hp; 1561 hp = hp->ht_next; 1562 free((caddr_t)hp2); 1563 } 1564} 1565 1566struct hostlist * 1567get_ht() 1568{ 1569 struct hostlist *hp; 1570 1571 hp = (struct hostlist *)malloc(sizeof (struct hostlist)); 1572 if (hp == (struct hostlist *)NULL) 1573 out_of_mem(); 1574 hp->ht_next = (struct hostlist *)NULL; 1575 hp->ht_flag = 0; 1576 return (hp); 1577} 1578 1579#ifdef ISO 1580/* 1581 * Translate an iso address. 1582 */ 1583get_isoaddr(cp, grp) 1584 char *cp; 1585 struct grouplist *grp; 1586{ 1587 struct iso_addr *isop; 1588 struct sockaddr_iso *isoaddr; 1589 1590 if (grp->gr_type != GT_NULL) 1591 return (1); 1592 if ((isop = iso_addr(cp)) == NULL) { 1593 syslog(LOG_ERR, 1594 "iso_addr failed, ignored"); 1595 return (1); 1596 } 1597 isoaddr = (struct sockaddr_iso *) 1598 malloc(sizeof (struct sockaddr_iso)); 1599 if (isoaddr == (struct sockaddr_iso *)NULL) 1600 out_of_mem(); 1601 memset(isoaddr, 0, sizeof(struct sockaddr_iso)); 1602 memmove(&isoaddr->siso_addr, isop, sizeof(struct iso_addr)); 1603 isoaddr->siso_len = sizeof(struct sockaddr_iso); 1604 isoaddr->siso_family = AF_ISO; 1605 grp->gr_type = GT_ISO; 1606 grp->gr_ptr.gt_isoaddr = isoaddr; 1607 return (0); 1608} 1609#endif /* ISO */ 1610 1611/* 1612 * Out of memory, fatal 1613 */ 1614void 1615out_of_mem() 1616{ 1617 1618 syslog(LOG_ERR, "Out of memory"); 1619 exit(2); 1620} 1621 1622/* 1623 * Do the mount syscall with the update flag to push the export info into 1624 * the kernel. 1625 */ 1626int 1627do_mount(ep, grp, exflags, anoncrp, dirp, dirplen, fsb) 1628 struct exportlist *ep; 1629 struct grouplist *grp; 1630 int exflags; 1631 struct ucred *anoncrp; 1632 char *dirp; 1633 int dirplen; 1634 struct statfs *fsb; 1635{ 1636 char *cp = (char *)NULL; 1637 u_long **addrp; 1638 int done; 1639 char savedc = '\0'; 1640 struct sockaddr_in sin, imask; 1641 union { 1642 struct ufs_args ua; 1643 struct iso_args ia; 1644 struct mfs_args ma; 1645#ifdef __NetBSD__ 1646 struct msdosfs_args da; 1647#endif 1648 } args; 1649 u_long net; 1650 1651 args.ua.fspec = 0; 1652 args.ua.export.ex_flags = exflags; 1653 args.ua.export.ex_anon = *anoncrp; 1654 args.ua.export.ex_indexfile = ep->ex_indexfile; 1655 memset(&sin, 0, sizeof(sin)); 1656 memset(&imask, 0, sizeof(imask)); 1657 sin.sin_family = AF_INET; 1658 sin.sin_len = sizeof(sin); 1659 imask.sin_family = AF_INET; 1660 imask.sin_len = sizeof(sin); 1661 if (grp->gr_type == GT_HOST) 1662 addrp = (u_long **)grp->gr_ptr.gt_hostent->h_addr_list; 1663 else 1664 addrp = (u_long **)NULL; 1665 done = FALSE; 1666 while (!done) { 1667 switch (grp->gr_type) { 1668 case GT_HOST: 1669 if (addrp) { 1670 sin.sin_addr.s_addr = **addrp; 1671 args.ua.export.ex_addrlen = sizeof(sin); 1672 } else 1673 args.ua.export.ex_addrlen = 0; 1674 args.ua.export.ex_addr = (struct sockaddr *)&sin; 1675 args.ua.export.ex_masklen = 0; 1676 break; 1677 case GT_NET: 1678 if (grp->gr_ptr.gt_net.nt_mask) 1679 imask.sin_addr.s_addr = grp->gr_ptr.gt_net.nt_mask; 1680 else { 1681 net = ntohl(grp->gr_ptr.gt_net.nt_net); 1682 if (IN_CLASSA(net)) 1683 imask.sin_addr.s_addr = inet_addr("255.0.0.0"); 1684 else if (IN_CLASSB(net)) 1685 imask.sin_addr.s_addr = 1686 inet_addr("255.255.0.0"); 1687 else 1688 imask.sin_addr.s_addr = 1689 inet_addr("255.255.255.0"); 1690 grp->gr_ptr.gt_net.nt_mask = imask.sin_addr.s_addr; 1691 } 1692 sin.sin_addr.s_addr = grp->gr_ptr.gt_net.nt_net; 1693 args.ua.export.ex_addr = (struct sockaddr *)&sin; 1694 args.ua.export.ex_addrlen = sizeof (sin); 1695 args.ua.export.ex_mask = (struct sockaddr *)&imask; 1696 args.ua.export.ex_masklen = sizeof (imask); 1697 break; 1698#ifdef ISO 1699 case GT_ISO: 1700 args.ua.export.ex_addr = 1701 (struct sockaddr *)grp->gr_ptr.gt_isoaddr; 1702 args.ua.export.ex_addrlen = 1703 sizeof(struct sockaddr_iso); 1704 args.ua.export.ex_masklen = 0; 1705 break; 1706#endif /* ISO */ 1707 case GT_IGNORE: 1708 return(0); 1709 break; 1710 default: 1711 syslog(LOG_ERR, "Bad grouptype"); 1712 if (cp) 1713 *cp = savedc; 1714 return (1); 1715 }; 1716 1717 /* 1718 * XXX: 1719 * Maybe I should just use the fsb->f_mntonname path instead 1720 * of looping back up the dirp to the mount point?? 1721 * Also, needs to know how to export all types of local 1722 * exportable file systems and not just "ufs". 1723 */ 1724 while (mount(fsb->f_fstypename, dirp, 1725 fsb->f_flags | MNT_UPDATE, (caddr_t)&args) < 0) { 1726 if (cp) 1727 *cp-- = savedc; 1728 else 1729 cp = dirp + dirplen - 1; 1730 if (errno == EPERM) { 1731 syslog(LOG_ERR, 1732 "Can't change attributes for %s.\n", dirp); 1733 return (1); 1734 } 1735 if (opt_flags & OP_ALLDIRS) { 1736 syslog(LOG_ERR, "Could not remount %s: %m", 1737 dirp); 1738 return (1); 1739 } 1740 /* back up over the last component */ 1741 while (*cp == '/' && cp > dirp) 1742 cp--; 1743 while (*(cp - 1) != '/' && cp > dirp) 1744 cp--; 1745 if (cp == dirp) { 1746 if (debug) 1747 fprintf(stderr,"mnt unsucc\n"); 1748 syslog(LOG_ERR, "Can't export %s", dirp); 1749 return (1); 1750 } 1751 savedc = *cp; 1752 *cp = '\0'; 1753 } 1754 if (addrp) { 1755 ++addrp; 1756 if (*addrp == (u_long *)NULL) 1757 done = TRUE; 1758 } else 1759 done = TRUE; 1760 } 1761 if (cp) 1762 *cp = savedc; 1763 return (0); 1764} 1765 1766/* 1767 * Translate a net address. 1768 */ 1769int 1770get_net(cp, net, maskflg) 1771 char *cp; 1772 struct netmsk *net; 1773 int maskflg; 1774{ 1775 struct netent *np; 1776 long netaddr; 1777 struct in_addr inetaddr, inetaddr2; 1778 char *name; 1779 1780 if (isdigit(*cp) && ((netaddr = inet_network(cp)) != -1)) { 1781 inetaddr = inet_makeaddr(netaddr, 0); 1782 /* 1783 * Due to arbritrary subnet masks, you don't know how many 1784 * bits to shift the address to make it into a network, 1785 * however you do know how to make a network address into 1786 * a host with host == 0 and then compare them. 1787 * (What a pest) 1788 */ 1789 if (!maskflg) { 1790 setnetent(0); 1791 while (np = getnetent()) { 1792 inetaddr2 = inet_makeaddr(np->n_net, 0); 1793 if (inetaddr2.s_addr == inetaddr.s_addr) 1794 break; 1795 } 1796 endnetent(); 1797 } 1798 } else if ((np = getnetbyname(cp)) != NULL) { 1799 inetaddr = inet_makeaddr(np->n_net, 0); 1800 } else 1801 return (1); 1802 1803 if (maskflg) 1804 net->nt_mask = inetaddr.s_addr; 1805 else { 1806 if (np) 1807 name = np->n_name; 1808 else 1809 name = inet_ntoa(inetaddr); 1810 net->nt_name = (char *)malloc(strlen(name) + 1); 1811 if (net->nt_name == (char *)NULL) 1812 out_of_mem(); 1813 strcpy(net->nt_name, name); 1814 net->nt_net = inetaddr.s_addr; 1815 } 1816 return (0); 1817} 1818 1819/* 1820 * Parse out the next white space separated field 1821 */ 1822void 1823nextfield(cp, endcp) 1824 char **cp; 1825 char **endcp; 1826{ 1827 char *p; 1828 1829 p = *cp; 1830 while (*p == ' ' || *p == '\t') 1831 p++; 1832 if (*p == '\n' || *p == '\0') 1833 *cp = *endcp = p; 1834 else { 1835 *cp = p++; 1836 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') 1837 p++; 1838 *endcp = p; 1839 } 1840} 1841 1842/* 1843 * Get an exports file line. Skip over blank lines and handle line 1844 * continuations. 1845 */ 1846int 1847get_line() 1848{ 1849 char *p, *cp; 1850 int len; 1851 int totlen, cont_line; 1852 1853 /* 1854 * Loop around ignoring blank lines and getting all continuation lines. 1855 */ 1856 p = line; 1857 totlen = 0; 1858 do { 1859 if (fgets(p, LINESIZ - totlen, exp_file) == NULL) 1860 return (0); 1861 len = strlen(p); 1862 cp = p + len - 1; 1863 cont_line = 0; 1864 while (cp >= p && 1865 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) { 1866 if (*cp == '\\') 1867 cont_line = 1; 1868 cp--; 1869 len--; 1870 } 1871 *++cp = '\0'; 1872 if (len > 0) { 1873 totlen += len; 1874 if (totlen >= LINESIZ) { 1875 syslog(LOG_ERR, "Exports line too long"); 1876 exit(2); 1877 } 1878 p = cp; 1879 } 1880 } while (totlen == 0 || cont_line); 1881 return (1); 1882} 1883 1884/* 1885 * Parse a description of a credential. 1886 */ 1887void 1888parsecred(namelist, cr) 1889 char *namelist; 1890 struct ucred *cr; 1891{ 1892 char *name; 1893 int cnt; 1894 char *names; 1895 struct passwd *pw; 1896 struct group *gr; 1897 int ngroups, groups[NGROUPS + 1]; 1898 1899 /* 1900 * Set up the unpriviledged user. 1901 */ 1902 cr->cr_ref = 1; 1903 cr->cr_uid = -2; 1904 cr->cr_groups[0] = -2; 1905 cr->cr_ngroups = 1; 1906 /* 1907 * Get the user's password table entry. 1908 */ 1909 names = strsep(&namelist, " \t\n"); 1910 name = strsep(&names, ":"); 1911 if (isdigit(*name) || *name == '-') 1912 pw = getpwuid(atoi(name)); 1913 else 1914 pw = getpwnam(name); 1915 /* 1916 * Credentials specified as those of a user. 1917 */ 1918 if (names == NULL) { 1919 if (pw == NULL) { 1920 syslog(LOG_ERR, "Unknown user: %s", name); 1921 return; 1922 } 1923 cr->cr_uid = pw->pw_uid; 1924 ngroups = NGROUPS + 1; 1925 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) 1926 syslog(LOG_ERR, "Too many groups"); 1927 /* 1928 * Convert from int's to gid_t's and compress out duplicate 1929 */ 1930 cr->cr_ngroups = ngroups - 1; 1931 cr->cr_groups[0] = groups[0]; 1932 for (cnt = 2; cnt < ngroups; cnt++) 1933 cr->cr_groups[cnt - 1] = groups[cnt]; 1934 return; 1935 } 1936 /* 1937 * Explicit credential specified as a colon separated list: 1938 * uid:gid:gid:... 1939 */ 1940 if (pw != NULL) 1941 cr->cr_uid = pw->pw_uid; 1942 else if (isdigit(*name) || *name == '-') 1943 cr->cr_uid = atoi(name); 1944 else { 1945 syslog(LOG_ERR, "Unknown user: %s", name); 1946 return; 1947 } 1948 cr->cr_ngroups = 0; 1949 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) { 1950 name = strsep(&names, ":"); 1951 if (isdigit(*name) || *name == '-') { 1952 cr->cr_groups[cr->cr_ngroups++] = atoi(name); 1953 } else { 1954 if ((gr = getgrnam(name)) == NULL) { 1955 syslog(LOG_ERR, "Unknown group: %s", name); 1956 continue; 1957 } 1958 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid; 1959 } 1960 } 1961 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS) 1962 syslog(LOG_ERR, "Too many groups"); 1963} 1964 1965#define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50) 1966/* 1967 * Routines that maintain the remote mounttab 1968 */ 1969void 1970get_mountlist() 1971{ 1972 struct mountlist *mlp, **mlpp; 1973 char *host, *dirp, *cp; 1974 int len; 1975 char str[STRSIZ]; 1976 FILE *mlfile; 1977 1978 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) { 1979 syslog(LOG_ERR, "Can't open %s", _PATH_RMOUNTLIST); 1980 return; 1981 } 1982 mlpp = &mlhead; 1983 while (fgets(str, STRSIZ, mlfile) != NULL) { 1984 cp = str; 1985 host = strsep(&cp, " \t\n"); 1986 dirp = strsep(&cp, " \t\n"); 1987 if (host == NULL || dirp == NULL) 1988 continue; 1989 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 1990 strncpy(mlp->ml_host, host, RPCMNT_NAMELEN); 1991 mlp->ml_host[RPCMNT_NAMELEN] = '\0'; 1992 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN); 1993 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0'; 1994 mlp->ml_next = (struct mountlist *)NULL; 1995 *mlpp = mlp; 1996 mlpp = &mlp->ml_next; 1997 } 1998 fclose(mlfile); 1999} 2000 2001void 2002del_mlist(hostp, dirp) 2003 char *hostp, *dirp; 2004{ 2005 struct mountlist *mlp, **mlpp; 2006 struct mountlist *mlp2; 2007 FILE *mlfile; 2008 int fnd = 0; 2009 2010 mlpp = &mlhead; 2011 mlp = mlhead; 2012 while (mlp) { 2013 if (!strcmp(mlp->ml_host, hostp) && 2014 (!dirp || !strcmp(mlp->ml_dirp, dirp))) { 2015 fnd = 1; 2016 mlp2 = mlp; 2017 *mlpp = mlp = mlp->ml_next; 2018 free((caddr_t)mlp2); 2019 } else { 2020 mlpp = &mlp->ml_next; 2021 mlp = mlp->ml_next; 2022 } 2023 } 2024 if (fnd) { 2025 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) { 2026 syslog(LOG_ERR,"Can't update %s", _PATH_RMOUNTLIST); 2027 return; 2028 } 2029 mlp = mlhead; 2030 while (mlp) { 2031 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2032 mlp = mlp->ml_next; 2033 } 2034 fclose(mlfile); 2035 } 2036} 2037 2038void 2039add_mlist(hostp, dirp) 2040 char *hostp, *dirp; 2041{ 2042 struct mountlist *mlp, **mlpp; 2043 FILE *mlfile; 2044 2045 mlpp = &mlhead; 2046 mlp = mlhead; 2047 while (mlp) { 2048 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) 2049 return; 2050 mlpp = &mlp->ml_next; 2051 mlp = mlp->ml_next; 2052 } 2053 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2054 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN); 2055 mlp->ml_host[RPCMNT_NAMELEN] = '\0'; 2056 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN); 2057 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0'; 2058 mlp->ml_next = (struct mountlist *)NULL; 2059 *mlpp = mlp; 2060 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) { 2061 syslog(LOG_ERR, "Can't update %s", _PATH_RMOUNTLIST); 2062 return; 2063 } 2064 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2065 fclose(mlfile); 2066} 2067 2068/* 2069 * This function is called via. SIGTERM when the system is going down. 2070 * It sends a broadcast RPCMNT_UMNTALL. 2071 */ 2072void 2073send_umntall() 2074{ 2075 (void) clnt_broadcast(RPCPROG_MNT, RPCMNT_VER1, RPCMNT_UMNTALL, 2076 xdr_void, (caddr_t)0, xdr_void, (caddr_t)0, umntall_each); 2077 exit(0); 2078} 2079 2080int 2081umntall_each(resultsp, raddr) 2082 caddr_t resultsp; 2083 struct sockaddr_in *raddr; 2084{ 2085 return (1); 2086} 2087 2088/* 2089 * Free up a group list. 2090 */ 2091void 2092free_grp(grp) 2093 struct grouplist *grp; 2094{ 2095 char **addrp; 2096 2097 if (grp->gr_type == GT_HOST) { 2098 if (grp->gr_ptr.gt_hostent->h_name) { 2099 addrp = grp->gr_ptr.gt_hostent->h_addr_list; 2100 while (addrp && *addrp) 2101 free(*addrp++); 2102 free((caddr_t)grp->gr_ptr.gt_hostent->h_addr_list); 2103 free(grp->gr_ptr.gt_hostent->h_name); 2104 } 2105 free((caddr_t)grp->gr_ptr.gt_hostent); 2106 } else if (grp->gr_type == GT_NET) { 2107 if (grp->gr_ptr.gt_net.nt_name) 2108 free(grp->gr_ptr.gt_net.nt_name); 2109 } 2110#ifdef ISO 2111 else if (grp->gr_type == GT_ISO) 2112 free((caddr_t)grp->gr_ptr.gt_isoaddr); 2113#endif 2114 free((caddr_t)grp); 2115} 2116 2117#ifdef DEBUG 2118void 2119SYSLOG(int pri, const char *fmt, ...) 2120{ 2121 va_list ap; 2122 2123 va_start(ap, fmt); 2124 vfprintf(stderr, fmt, ap); 2125 va_end(ap); 2126} 2127#endif /* DEBUG */ 2128 2129/* 2130 * Check options for consistency. 2131 */ 2132int 2133check_options(dp) 2134 struct dirlist *dp; 2135{ 2136 2137 if (dp == (struct dirlist *)NULL) 2138 return (1); 2139 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL) || 2140 (opt_flags & (OP_MAPROOT | OP_KERB)) == (OP_MAPROOT | OP_KERB) || 2141 (opt_flags & (OP_MAPALL | OP_KERB)) == (OP_MAPALL | OP_KERB)) { 2142 syslog(LOG_ERR, "-mapall, -maproot and -kerb mutually exclusive"); 2143 return (1); 2144 } 2145 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) { 2146 syslog(LOG_ERR, "-mask requires -net"); 2147 return (1); 2148 } 2149 if ((opt_flags & (OP_NET | OP_ISO)) == (OP_NET | OP_ISO)) { 2150 syslog(LOG_ERR, "-net and -iso mutually exclusive"); 2151 return (1); 2152 } 2153 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) { 2154 syslog(LOG_ERR, "-alldir has multiple directories"); 2155 return (1); 2156 } 2157 return (0); 2158} 2159 2160/* 2161 * Check an absolute directory path for any symbolic links. Return true 2162 * if no symbolic links are found. 2163 */ 2164int 2165check_dirpath(dirp) 2166 char *dirp; 2167{ 2168 char *cp; 2169 int ret = 1; 2170 struct stat sb; 2171 2172 cp = dirp + 1; 2173 while (*cp && ret) { 2174 if (*cp == '/') { 2175 *cp = '\0'; 2176 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 2177 ret = 0; 2178 *cp = '/'; 2179 } 2180 cp++; 2181 } 2182 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 2183 ret = 0; 2184 return (ret); 2185} 2186 2187/* 2188 * Just translate an ascii string to an integer. 2189 */ 2190int 2191get_num(cp) 2192 register char *cp; 2193{ 2194 register int res = 0; 2195 2196 while (*cp) { 2197 if (*cp < '0' || *cp > '9') 2198 return (-1); 2199 res = res * 10 + (*cp++ - '0'); 2200 } 2201 return (res); 2202} 2203