239 while ((c = getopt(argc, argv, "n")) != EOF)
240 switch (c) {
241 case 'n':
242 root_only = 0;
243 break;
244 default:
245 fprintf(stderr, "Usage: mountd [-n] [export_file]\n");
246 exit(1);
247 };
248 argc -= optind;
249 argv += optind;
250 grphead = (struct grouplist *)NULL;
251 exphead = (struct exportlist *)NULL;
252 mlhead = (struct mountlist *)NULL;
253 if (argc == 1) {
254 strncpy(exname, *argv, MAXPATHLEN-1);
255 exname[MAXPATHLEN-1] = '\0';
256 } else
257 strcpy(exname, _PATH_EXPORTS);
258 openlog("mountd", LOG_PID, LOG_DAEMON);
259 if (debug)
260 fprintf(stderr,"Getting export list.\n");
261 get_exportlist();
262 if (debug)
263 fprintf(stderr,"Getting mount list.\n");
264 get_mountlist();
265 if (debug)
266 fprintf(stderr,"Here we go.\n");
267 if (debug == 0) {
268 daemon(0, 0);
269 signal(SIGINT, SIG_IGN);
270 signal(SIGQUIT, SIG_IGN);
271 }
272 signal(SIGHUP, (void (*) __P((int))) get_exportlist);
273 signal(SIGTERM, (void (*) __P((int))) send_umntall);
274 { FILE *pidfile = fopen(_PATH_MOUNTDPID, "w");
275 if (pidfile != NULL) {
276 fprintf(pidfile, "%d\n", getpid());
277 fclose(pidfile);
278 }
279 }
280 if ((transp = svcudp_create(RPC_ANYSOCK)) == NULL) {
281 syslog(LOG_ERR, "Can't create socket");
282 exit(1);
283 }
284 pmap_unset(RPCPROG_MNT, RPCMNT_VER1);
285 if (!svc_register(transp, RPCPROG_MNT, RPCMNT_VER1, mntsrv,
286 IPPROTO_UDP)) {
287 syslog(LOG_ERR, "Can't register mount");
288 exit(1);
289 }
290 svc_run();
291 syslog(LOG_ERR, "Mountd died");
292 exit(1);
293}
294
295/*
296 * The mount rpc service
297 */
298void
299mntsrv(rqstp, transp)
300 struct svc_req *rqstp;
301 SVCXPRT *transp;
302{
303 struct exportlist *ep;
304 struct dirlist *dp;
305 nfsv2fh_t nfh;
306 struct authunix_parms *ucr;
307 struct stat stb;
308 struct statfs fsb;
309 struct hostent *hp;
310 u_long saddr;
311 char rpcpath[RPCMNT_PATHLEN+1], dirpath[MAXPATHLEN];
312 int bad = ENOENT, omask, defset;
313 uid_t uid = -2;
314
315 /* Get authorization */
316 switch (rqstp->rq_cred.oa_flavor) {
317 case AUTH_UNIX:
318 ucr = (struct authunix_parms *)rqstp->rq_clntcred;
319 uid = ucr->aup_uid;
320 break;
321 case AUTH_NULL:
322 default:
323 break;
324 }
325
326 saddr = transp->xp_raddr.sin_addr.s_addr;
327 hp = (struct hostent *)NULL;
328 switch (rqstp->rq_proc) {
329 case NULLPROC:
330 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL))
331 syslog(LOG_ERR, "Can't send reply");
332 return;
333 case RPCMNT_MOUNT:
334 if ((uid != 0 && root_only) || uid == -2) {
335 svcerr_weakauth(transp);
336 return;
337 }
338 if (!svc_getargs(transp, xdr_dir, rpcpath)) {
339 svcerr_decode(transp);
340 return;
341 }
342
343 /*
344 * Get the real pathname and make sure it is a directory
345 * that exists.
346 */
347 if (realpath(rpcpath, dirpath) == 0 ||
348 stat(dirpath, &stb) < 0 ||
349 (stb.st_mode & S_IFMT) != S_IFDIR ||
350 statfs(dirpath, &fsb) < 0) {
351 chdir("/"); /* Just in case realpath doesn't */
352 if (debug)
353 fprintf(stderr, "stat failed on %s\n", dirpath);
354 if (!svc_sendreply(transp, xdr_long, (caddr_t)&bad))
355 syslog(LOG_ERR, "Can't send reply");
356 return;
357 }
358
359 /* Check in the exports list */
360 omask = sigblock(sigmask(SIGHUP));
361 ep = ex_search(&fsb.f_fsid);
362 defset = 0;
363 if (ep && (chk_host(ep->ex_defdir, saddr, &defset) ||
364 ((dp = dirp_search(ep->ex_dirl, dirpath)) &&
365 chk_host(dp, saddr, &defset)) ||
366 (defset && scan_tree(ep->ex_defdir, saddr) == 0 &&
367 scan_tree(ep->ex_dirl, saddr) == 0))) {
368 /* Get the file handle */
369 bzero((caddr_t)&nfh, sizeof(nfh));
370 if (getfh(dirpath, (fhandle_t *)&nfh) < 0) {
371 bad = errno;
372 syslog(LOG_ERR, "Can't get fh for %s", dirpath);
373 if (!svc_sendreply(transp, xdr_long,
374 (caddr_t)&bad))
375 syslog(LOG_ERR, "Can't send reply");
376 sigsetmask(omask);
377 return;
378 }
379 if (!svc_sendreply(transp, xdr_fhs, (caddr_t)&nfh))
380 syslog(LOG_ERR, "Can't send reply");
381 if (hp == NULL)
382 hp = gethostbyaddr((caddr_t)&saddr,
383 sizeof(saddr), AF_INET);
384 if (hp)
385 add_mlist(hp->h_name, dirpath);
386 else
387 add_mlist(inet_ntoa(transp->xp_raddr.sin_addr),
388 dirpath);
389 if (debug)
390 fprintf(stderr,"Mount successfull.\n");
391 } else {
392 bad = EACCES;
393 if (!svc_sendreply(transp, xdr_long, (caddr_t)&bad))
394 syslog(LOG_ERR, "Can't send reply");
395 }
396 sigsetmask(omask);
397 return;
398 case RPCMNT_DUMP:
399 if (!svc_sendreply(transp, xdr_mlist, (caddr_t)NULL))
400 syslog(LOG_ERR, "Can't send reply");
401 return;
402 case RPCMNT_UMOUNT:
403 if ((uid != 0 && root_only) || uid == -2) {
404 svcerr_weakauth(transp);
405 return;
406 }
407 if (!svc_getargs(transp, xdr_dir, dirpath)) {
408 svcerr_decode(transp);
409 return;
410 }
411 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL))
412 syslog(LOG_ERR, "Can't send reply");
413 hp = gethostbyaddr((caddr_t)&saddr, sizeof(saddr), AF_INET);
414 if (hp)
415 del_mlist(hp->h_name, dirpath);
416 del_mlist(inet_ntoa(transp->xp_raddr.sin_addr), dirpath);
417 return;
418 case RPCMNT_UMNTALL:
419 if ((uid != 0 && root_only) || uid == -2) {
420 svcerr_weakauth(transp);
421 return;
422 }
423 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL))
424 syslog(LOG_ERR, "Can't send reply");
425 hp = gethostbyaddr((caddr_t)&saddr, sizeof(saddr), AF_INET);
426 if (hp)
427 del_mlist(hp->h_name, (char *)NULL);
428 del_mlist(inet_ntoa(transp->xp_raddr.sin_addr), (char *)NULL);
429 return;
430 case RPCMNT_EXPORT:
431 if (!svc_sendreply(transp, xdr_explist, (caddr_t)NULL))
432 syslog(LOG_ERR, "Can't send reply");
433 return;
434 default:
435 svcerr_noproc(transp);
436 return;
437 }
438}
439
440/*
441 * Xdr conversion for a dirpath string
442 */
443int
444xdr_dir(xdrsp, dirp)
445 XDR *xdrsp;
446 char *dirp;
447{
448 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
449}
450
451/*
452 * Xdr routine to generate fhstatus
453 */
454int
455xdr_fhs(xdrsp, nfh)
456 XDR *xdrsp;
457 nfsv2fh_t *nfh;
458{
459 int ok = 0;
460
461 if (!xdr_long(xdrsp, &ok))
462 return (0);
463 return (xdr_opaque(xdrsp, (caddr_t)nfh, NFSX_FH));
464}
465
466int
467xdr_mlist(xdrsp, cp)
468 XDR *xdrsp;
469 caddr_t cp;
470{
471 struct mountlist *mlp;
472 int true = 1;
473 int false = 0;
474 char *strp;
475
476 mlp = mlhead;
477 while (mlp) {
478 if (!xdr_bool(xdrsp, &true))
479 return (0);
480 strp = &mlp->ml_host[0];
481 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
482 return (0);
483 strp = &mlp->ml_dirp[0];
484 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
485 return (0);
486 mlp = mlp->ml_next;
487 }
488 if (!xdr_bool(xdrsp, &false))
489 return (0);
490 return (1);
491}
492
493/*
494 * Xdr conversion for export list
495 */
496int
497xdr_explist(xdrsp, cp)
498 XDR *xdrsp;
499 caddr_t cp;
500{
501 struct exportlist *ep;
502 int false = 0;
503 int omask, putdef;
504
505 omask = sigblock(sigmask(SIGHUP));
506 ep = exphead;
507 while (ep) {
508 putdef = 0;
509 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, &putdef))
510 goto errout;
511 if (ep->ex_defdir && putdef == 0 &&
512 put_exlist(ep->ex_defdir, xdrsp, (struct dirlist *)NULL,
513 &putdef))
514 goto errout;
515 ep = ep->ex_next;
516 }
517 sigsetmask(omask);
518 if (!xdr_bool(xdrsp, &false))
519 return (0);
520 return (1);
521errout:
522 sigsetmask(omask);
523 return (0);
524}
525
526/*
527 * Called from xdr_explist() to traverse the tree and export the
528 * directory paths.
529 */
530int
531put_exlist(dp, xdrsp, adp, putdefp)
532 struct dirlist *dp;
533 XDR *xdrsp;
534 struct dirlist *adp;
535 int *putdefp;
536{
537 struct grouplist *grp;
538 struct hostlist *hp;
539 int true = 1;
540 int false = 0;
541 int gotalldir = 0;
542 char *strp;
543
544 if (dp) {
545 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp))
546 return (1);
547 if (!xdr_bool(xdrsp, &true))
548 return (1);
549 strp = dp->dp_dirp;
550 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
551 return (1);
552 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) {
553 gotalldir = 1;
554 *putdefp = 1;
555 }
556 if ((dp->dp_flag & DP_DEFSET) == 0 &&
557 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) {
558 hp = dp->dp_hosts;
559 while (hp) {
560 grp = hp->ht_grp;
561 if (grp->gr_type == GT_HOST) {
562 if (!xdr_bool(xdrsp, &true))
563 return (1);
564 strp = grp->gr_ptr.gt_hostent->h_name;
565 if (!xdr_string(xdrsp, &strp,
566 RPCMNT_NAMELEN))
567 return (1);
568 } else if (grp->gr_type == GT_NET) {
569 if (!xdr_bool(xdrsp, &true))
570 return (1);
571 strp = grp->gr_ptr.gt_net.nt_name;
572 if (!xdr_string(xdrsp, &strp,
573 RPCMNT_NAMELEN))
574 return (1);
575 }
576 hp = hp->ht_next;
577 if (gotalldir && hp == (struct hostlist *)NULL) {
578 hp = adp->dp_hosts;
579 gotalldir = 0;
580 }
581 }
582 }
583 if (!xdr_bool(xdrsp, &false))
584 return (1);
585 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp))
586 return (1);
587 }
588 return (0);
589}
590
591#define LINESIZ 10240
592char line[LINESIZ];
593FILE *exp_file;
594
595/*
596 * Get the export list
597 */
598void
599get_exportlist()
600{
601 struct exportlist *ep, *ep2;
602 struct grouplist *grp, *tgrp;
603 struct exportlist **epp;
604 struct dirlist *dirhead;
605 struct statfs fsb, *fsp;
606 struct hostent *hpe;
607 struct ucred anon;
608 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc;
609 int len, has_host, exflags, got_nondir, dirplen, num, i, netgrp;
610
611 /*
612 * First, get rid of the old list
613 */
614 ep = exphead;
615 while (ep) {
616 ep2 = ep;
617 ep = ep->ex_next;
618 free_exp(ep2);
619 }
620 exphead = (struct exportlist *)NULL;
621
622 grp = grphead;
623 while (grp) {
624 tgrp = grp;
625 grp = grp->gr_next;
626 free_grp(tgrp);
627 }
628 grphead = (struct grouplist *)NULL;
629
630 /*
631 * And delete exports that are in the kernel for all local
632 * file systems.
633 * XXX: Should know how to handle all local exportable file systems
634 * instead of just MOUNT_UFS.
635 */
636 num = getmntinfo(&fsp, MNT_NOWAIT);
637 for (i = 0; i < num; i++) {
638 union {
639 struct ufs_args ua;
640 struct iso_args ia;
641 struct mfs_args ma;
642 } targs;
643
644 switch (fsp->f_type) {
645 case MOUNT_MFS:
646 case MOUNT_UFS:
647 case MOUNT_CD9660:
648 case MOUNT_MSDOS:
649 targs.ua.fspec = NULL;
650 targs.ua.export.ex_flags = MNT_DELEXPORT;
651 if (mount(fsp->f_type, fsp->f_mntonname,
652 fsp->f_flags | MNT_UPDATE,
653 (caddr_t)&targs) < 0)
654 syslog(LOG_ERR, "Can't delete exports for %s",
655 fsp->f_mntonname);
656 }
657 fsp++;
658 }
659
660 /*
661 * Read in the exports file and build the list, calling
662 * mount() as we go along to push the export rules into the kernel.
663 */
664 if ((exp_file = fopen(exname, "r")) == NULL) {
665 syslog(LOG_ERR, "Can't open %s", exname);
666 exit(2);
667 }
668 dirhead = (struct dirlist *)NULL;
669 while (get_line()) {
670 if (debug)
671 fprintf(stderr,"Got line %s\n",line);
672 cp = line;
673 nextfield(&cp, &endcp);
674 if (*cp == '#')
675 goto nextline;
676
677 /*
678 * Set defaults.
679 */
680 has_host = FALSE;
681 anon = def_anon;
682 exflags = MNT_EXPORTED;
683 got_nondir = 0;
684 opt_flags = 0;
685 ep = (struct exportlist *)NULL;
686
687 /*
688 * Create new exports list entry
689 */
690 len = endcp-cp;
691 tgrp = grp = get_grp();
692 while (len > 0) {
693 if (len > RPCMNT_NAMELEN) {
694 getexp_err(ep, tgrp);
695 goto nextline;
696 }
697 if (*cp == '-') {
698 if (ep == (struct exportlist *)NULL) {
699 getexp_err(ep, tgrp);
700 goto nextline;
701 }
702 if (debug)
703 fprintf(stderr, "doing opt %s\n", cp);
704 got_nondir = 1;
705 if (do_opt(&cp, &endcp, ep, grp, &has_host,
706 &exflags, &anon)) {
707 getexp_err(ep, tgrp);
708 goto nextline;
709 }
710 } else if (*cp == '/') {
711 savedc = *endcp;
712 *endcp = '\0';
713 if (check_dirpath(cp) &&
714 statfs(cp, &fsb) >= 0) {
715 if (got_nondir) {
716 syslog(LOG_ERR, "Dirs must be first");
717 getexp_err(ep, tgrp);
718 goto nextline;
719 }
720 if (ep) {
721 if (ep->ex_fs.val[0] != fsb.f_fsid.val[0] ||
722 ep->ex_fs.val[1] != fsb.f_fsid.val[1]) {
723 getexp_err(ep, tgrp);
724 goto nextline;
725 }
726 } else {
727 /*
728 * See if this directory is already
729 * in the list.
730 */
731 ep = ex_search(&fsb.f_fsid);
732 if (ep == (struct exportlist *)NULL) {
733 ep = get_exp();
734 ep->ex_fs = fsb.f_fsid;
735 ep->ex_fsdir = (char *)
736 malloc(strlen(fsb.f_mntonname) + 1);
737 if (ep->ex_fsdir)
738 strcpy(ep->ex_fsdir,
739 fsb.f_mntonname);
740 else
741 out_of_mem();
742 if (debug)
743 fprintf(stderr,
744 "Making new ep fs=0x%x,0x%x\n",
745 fsb.f_fsid.val[0],
746 fsb.f_fsid.val[1]);
747 } else if (debug)
748 fprintf(stderr,
749 "Found ep fs=0x%x,0x%x\n",
750 fsb.f_fsid.val[0],
751 fsb.f_fsid.val[1]);
752 }
753
754 /*
755 * Add dirpath to export mount point.
756 */
757 dirp = add_expdir(&dirhead, cp, len);
758 dirplen = len;
759 } else {
760 getexp_err(ep, tgrp);
761 goto nextline;
762 }
763 *endcp = savedc;
764 } else {
765 savedc = *endcp;
766 *endcp = '\0';
767 got_nondir = 1;
768 if (ep == (struct exportlist *)NULL) {
769 getexp_err(ep, tgrp);
770 goto nextline;
771 }
772
773 /*
774 * Get the host or netgroup.
775 */
776 setnetgrent(cp);
777 netgrp = getnetgrent(&hst, &usr, &dom);
778 do {
779 if (has_host) {
780 grp->gr_next = get_grp();
781 grp = grp->gr_next;
782 }
783 if (netgrp) {
784 if (get_host(hst, grp)) {
785 syslog(LOG_ERR, "Bad netgroup %s", cp);
786 getexp_err(ep, tgrp);
787 goto nextline;
788 }
789 } else if (get_host(cp, grp)) {
790 getexp_err(ep, tgrp);
791 goto nextline;
792 }
793 has_host = TRUE;
794 } while (netgrp && getnetgrent(&hst, &usr, &dom));
795 endnetgrent();
796 *endcp = savedc;
797 }
798 cp = endcp;
799 nextfield(&cp, &endcp);
800 len = endcp - cp;
801 }
802 if (check_options(dirhead)) {
803 getexp_err(ep, tgrp);
804 goto nextline;
805 }
806 if (!has_host) {
807 grp->gr_type = GT_HOST;
808 if (debug)
809 fprintf(stderr,"Adding a default entry\n");
810 /* add a default group and make the grp list NULL */
811 hpe = (struct hostent *)malloc(sizeof(struct hostent));
812 if (hpe == (struct hostent *)NULL)
813 out_of_mem();
814 hpe->h_name = "Default";
815 hpe->h_addrtype = AF_INET;
816 hpe->h_length = sizeof (u_long);
817 hpe->h_addr_list = (char **)NULL;
818 grp->gr_ptr.gt_hostent = hpe;
819
820 /*
821 * Don't allow a network export coincide with a list of
822 * host(s) on the same line.
823 */
824 } else if ((opt_flags & OP_NET) && tgrp->gr_next) {
825 getexp_err(ep, tgrp);
826 goto nextline;
827 }
828
829 /*
830 * Loop through hosts, pushing the exports into the kernel.
831 * After loop, tgrp points to the start of the list and
832 * grp points to the last entry in the list.
833 */
834 grp = tgrp;
835 do {
836 if (do_mount(ep, grp, exflags, &anon, dirp,
837 dirplen, &fsb)) {
838 getexp_err(ep, tgrp);
839 goto nextline;
840 }
841 } while (grp->gr_next && (grp = grp->gr_next));
842
843 /*
844 * Success. Update the data structures.
845 */
846 if (has_host) {
847 hang_dirp(dirhead, tgrp, ep, (opt_flags & OP_ALLDIRS));
848 grp->gr_next = grphead;
849 grphead = tgrp;
850 } else {
851 hang_dirp(dirhead, (struct grouplist *)NULL, ep,
852 (opt_flags & OP_ALLDIRS));
853 free_grp(grp);
854 }
855 dirhead = (struct dirlist *)NULL;
856 if ((ep->ex_flag & EX_LINKED) == 0) {
857 ep2 = exphead;
858 epp = &exphead;
859
860 /*
861 * Insert in the list in alphabetical order.
862 */
863 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) {
864 epp = &ep2->ex_next;
865 ep2 = ep2->ex_next;
866 }
867 if (ep2)
868 ep->ex_next = ep2;
869 *epp = ep;
870 ep->ex_flag |= EX_LINKED;
871 }
872nextline:
873 if (dirhead) {
874 free_dir(dirhead);
875 dirhead = (struct dirlist *)NULL;
876 }
877 }
878 fclose(exp_file);
879}
880
881/*
882 * Allocate an export list element
883 */
884struct exportlist *
885get_exp()
886{
887 struct exportlist *ep;
888
889 ep = (struct exportlist *)malloc(sizeof (struct exportlist));
890 if (ep == (struct exportlist *)NULL)
891 out_of_mem();
892 bzero((caddr_t)ep, sizeof (struct exportlist));
893 return (ep);
894}
895
896/*
897 * Allocate a group list element
898 */
899struct grouplist *
900get_grp()
901{
902 struct grouplist *gp;
903
904 gp = (struct grouplist *)malloc(sizeof (struct grouplist));
905 if (gp == (struct grouplist *)NULL)
906 out_of_mem();
907 bzero((caddr_t)gp, sizeof (struct grouplist));
908 return (gp);
909}
910
911/*
912 * Clean up upon an error in get_exportlist().
913 */
914void
915getexp_err(ep, grp)
916 struct exportlist *ep;
917 struct grouplist *grp;
918{
919 struct grouplist *tgrp;
920
921 syslog(LOG_ERR, "Bad exports list line %s", line);
922 if (ep && (ep->ex_flag & EX_LINKED) == 0)
923 free_exp(ep);
924 while (grp) {
925 tgrp = grp;
926 grp = grp->gr_next;
927 free_grp(tgrp);
928 }
929}
930
931/*
932 * Search the export list for a matching fs.
933 */
934struct exportlist *
935ex_search(fsid)
936 fsid_t *fsid;
937{
938 struct exportlist *ep;
939
940 ep = exphead;
941 while (ep) {
942 if (ep->ex_fs.val[0] == fsid->val[0] &&
943 ep->ex_fs.val[1] == fsid->val[1])
944 return (ep);
945 ep = ep->ex_next;
946 }
947 return (ep);
948}
949
950/*
951 * Add a directory path to the list.
952 */
953char *
954add_expdir(dpp, cp, len)
955 struct dirlist **dpp;
956 char *cp;
957 int len;
958{
959 struct dirlist *dp;
960
961 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len);
962 dp->dp_left = *dpp;
963 dp->dp_right = (struct dirlist *)NULL;
964 dp->dp_flag = 0;
965 dp->dp_hosts = (struct hostlist *)NULL;
966 strcpy(dp->dp_dirp, cp);
967 *dpp = dp;
968 return (dp->dp_dirp);
969}
970
971/*
972 * Hang the dir list element off the dirpath binary tree as required
973 * and update the entry for host.
974 */
975void
976hang_dirp(dp, grp, ep, alldirs)
977 struct dirlist *dp;
978 struct grouplist *grp;
979 struct exportlist *ep;
980 int alldirs;
981{
982 struct hostlist *hp;
983 struct dirlist *dp2;
984
985 if (alldirs) {
986 if (ep->ex_defdir)
987 free((caddr_t)dp);
988 else
989 ep->ex_defdir = dp;
990 if (grp == (struct grouplist *)NULL)
991 ep->ex_defdir->dp_flag |= DP_DEFSET;
992 else while (grp) {
993 hp = get_ht();
994 hp->ht_grp = grp;
995 hp->ht_next = ep->ex_defdir->dp_hosts;
996 ep->ex_defdir->dp_hosts = hp;
997 grp = grp->gr_next;
998 }
999 } else {
1000
1001 /*
1002 * Loop throught the directories adding them to the tree.
1003 */
1004 while (dp) {
1005 dp2 = dp->dp_left;
1006 add_dlist(&ep->ex_dirl, dp, grp);
1007 dp = dp2;
1008 }
1009 }
1010}
1011
1012/*
1013 * Traverse the binary tree either updating a node that is already there
1014 * for the new directory or adding the new node.
1015 */
1016void
1017add_dlist(dpp, newdp, grp)
1018 struct dirlist **dpp;
1019 struct dirlist *newdp;
1020 struct grouplist *grp;
1021{
1022 struct dirlist *dp;
1023 struct hostlist *hp;
1024 int cmp;
1025
1026 dp = *dpp;
1027 if (dp) {
1028 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp);
1029 if (cmp > 0) {
1030 add_dlist(&dp->dp_left, newdp, grp);
1031 return;
1032 } else if (cmp < 0) {
1033 add_dlist(&dp->dp_right, newdp, grp);
1034 return;
1035 } else
1036 free((caddr_t)newdp);
1037 } else {
1038 dp = newdp;
1039 dp->dp_left = (struct dirlist *)NULL;
1040 *dpp = dp;
1041 }
1042 if (grp) {
1043
1044 /*
1045 * Hang all of the host(s) off of the directory point.
1046 */
1047 do {
1048 hp = get_ht();
1049 hp->ht_grp = grp;
1050 hp->ht_next = dp->dp_hosts;
1051 dp->dp_hosts = hp;
1052 grp = grp->gr_next;
1053 } while (grp);
1054 } else
1055 dp->dp_flag |= DP_DEFSET;
1056}
1057
1058/*
1059 * Search for a dirpath on the export point.
1060 */
1061struct dirlist *
1062dirp_search(dp, dirpath)
1063 struct dirlist *dp;
1064 char *dirpath;
1065{
1066 int cmp;
1067
1068 if (dp) {
1069 cmp = strcmp(dp->dp_dirp, dirpath);
1070 if (cmp > 0)
1071 return (dirp_search(dp->dp_left, dirpath));
1072 else if (cmp < 0)
1073 return (dirp_search(dp->dp_right, dirpath));
1074 else
1075 return (dp);
1076 }
1077 return (dp);
1078}
1079
1080/*
1081 * Scan for a host match in a directory tree.
1082 */
1083int
1084chk_host(dp, saddr, defsetp)
1085 struct dirlist *dp;
1086 u_long saddr;
1087 int *defsetp;
1088{
1089 struct hostlist *hp;
1090 struct grouplist *grp;
1091 u_long **addrp;
1092
1093 if (dp) {
1094 if (dp->dp_flag & DP_DEFSET)
1095 *defsetp = 1;
1096 hp = dp->dp_hosts;
1097 while (hp) {
1098 grp = hp->ht_grp;
1099 switch (grp->gr_type) {
1100 case GT_HOST:
1101 addrp = (u_long **)
1102 grp->gr_ptr.gt_hostent->h_addr_list;
1103 while (*addrp) {
1104 if (**addrp == saddr)
1105 return (1);
1106 addrp++;
1107 }
1108 break;
1109 case GT_NET:
1110 if ((saddr & grp->gr_ptr.gt_net.nt_mask) ==
1111 grp->gr_ptr.gt_net.nt_net)
1112 return (1);
1113 break;
1114 };
1115 hp = hp->ht_next;
1116 }
1117 }
1118 return (0);
1119}
1120
1121/*
1122 * Scan tree for a host that matches the address.
1123 */
1124int
1125scan_tree(dp, saddr)
1126 struct dirlist *dp;
1127 u_long saddr;
1128{
1129 int defset;
1130
1131 if (dp) {
1132 if (scan_tree(dp->dp_left, saddr))
1133 return (1);
1134 if (chk_host(dp, saddr, &defset))
1135 return (1);
1136 if (scan_tree(dp->dp_right, saddr))
1137 return (1);
1138 }
1139 return (0);
1140}
1141
1142/*
1143 * Traverse the dirlist tree and free it up.
1144 */
1145void
1146free_dir(dp)
1147 struct dirlist *dp;
1148{
1149
1150 if (dp) {
1151 free_dir(dp->dp_left);
1152 free_dir(dp->dp_right);
1153 free_host(dp->dp_hosts);
1154 free((caddr_t)dp);
1155 }
1156}
1157
1158/*
1159 * Parse the option string and update fields.
1160 * Option arguments may either be -<option>=<value> or
1161 * -<option> <value>
1162 */
1163int
1164do_opt(cpp, endcpp, ep, grp, has_hostp, exflagsp, cr)
1165 char **cpp, **endcpp;
1166 struct exportlist *ep;
1167 struct grouplist *grp;
1168 int *has_hostp;
1169 int *exflagsp;
1170 struct ucred *cr;
1171{
1172 char *cpoptarg, *cpoptend;
1173 char *cp, *endcp, *cpopt, savedc, savedc2;
1174 int allflag, usedarg;
1175
1176 cpopt = *cpp;
1177 cpopt++;
1178 cp = *endcpp;
1179 savedc = *cp;
1180 *cp = '\0';
1181 while (cpopt && *cpopt) {
1182 allflag = 1;
1183 usedarg = -2;
1184 if (cpoptend = index(cpopt, ',')) {
1185 *cpoptend++ = '\0';
1186 if (cpoptarg = index(cpopt, '='))
1187 *cpoptarg++ = '\0';
1188 } else {
1189 if (cpoptarg = index(cpopt, '='))
1190 *cpoptarg++ = '\0';
1191 else {
1192 *cp = savedc;
1193 nextfield(&cp, &endcp);
1194 **endcpp = '\0';
1195 if (endcp > cp && *cp != '-') {
1196 cpoptarg = cp;
1197 savedc2 = *endcp;
1198 *endcp = '\0';
1199 usedarg = 0;
1200 }
1201 }
1202 }
1203 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) {
1204 *exflagsp |= MNT_EXRDONLY;
1205 } else if (cpoptarg && (!strcmp(cpopt, "maproot") ||
1206 !(allflag = strcmp(cpopt, "mapall")) ||
1207 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) {
1208 usedarg++;
1209 parsecred(cpoptarg, cr);
1210 if (allflag == 0) {
1211 *exflagsp |= MNT_EXPORTANON;
1212 opt_flags |= OP_MAPALL;
1213 } else
1214 opt_flags |= OP_MAPROOT;
1215 } else if (!strcmp(cpopt, "kerb") || !strcmp(cpopt, "k")) {
1216 *exflagsp |= MNT_EXKERB;
1217 opt_flags |= OP_KERB;
1218 } else if (cpoptarg && (!strcmp(cpopt, "mask") ||
1219 !strcmp(cpopt, "m"))) {
1220 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) {
1221 syslog(LOG_ERR, "Bad mask: %s", cpoptarg);
1222 return (1);
1223 }
1224 usedarg++;
1225 opt_flags |= OP_MASK;
1226 } else if (cpoptarg && (!strcmp(cpopt, "network") ||
1227 !strcmp(cpopt, "n"))) {
1228 if (grp->gr_type != GT_NULL) {
1229 syslog(LOG_ERR, "Network/host conflict");
1230 return (1);
1231 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) {
1232 syslog(LOG_ERR, "Bad net: %s", cpoptarg);
1233 return (1);
1234 }
1235 grp->gr_type = GT_NET;
1236 *has_hostp = 1;
1237 usedarg++;
1238 opt_flags |= OP_NET;
1239 } else if (!strcmp(cpopt, "alldirs")) {
1240 opt_flags |= OP_ALLDIRS;
1241#ifdef ISO
1242 } else if (cpoptarg && !strcmp(cpopt, "iso")) {
1243 if (get_isoaddr(cpoptarg, grp)) {
1244 syslog(LOG_ERR, "Bad iso addr: %s", cpoptarg);
1245 return (1);
1246 }
1247 *has_hostp = 1;
1248 usedarg++;
1249 opt_flags |= OP_ISO;
1250#endif /* ISO */
1251 } else {
1252 syslog(LOG_ERR, "Bad opt %s", cpopt);
1253 return (1);
1254 }
1255 if (usedarg >= 0) {
1256 *endcp = savedc2;
1257 **endcpp = savedc;
1258 if (usedarg > 0) {
1259 *cpp = cp;
1260 *endcpp = endcp;
1261 }
1262 return (0);
1263 }
1264 cpopt = cpoptend;
1265 }
1266 **endcpp = savedc;
1267 return (0);
1268}
1269
1270/*
1271 * Translate a character string to the corresponding list of network
1272 * addresses for a hostname.
1273 */
1274int
1275get_host(cp, grp)
1276 char *cp;
1277 struct grouplist *grp;
1278{
1279 struct hostent *hp, *nhp;
1280 char **addrp, **naddrp;
1281 struct hostent t_host;
1282 int i;
1283 u_long saddr;
1284 char *aptr[2];
1285
1286 if (grp->gr_type != GT_NULL)
1287 return (1);
1288 if ((hp = gethostbyname(cp)) == NULL) {
1289 if (isdigit(*cp)) {
1290 saddr = inet_addr(cp);
1291 if (saddr == -1) {
1292 syslog(LOG_ERR, "Inet_addr failed");
1293 return (1);
1294 }
1295 if ((hp = gethostbyaddr((caddr_t)&saddr, sizeof (saddr),
1296 AF_INET)) == NULL) {
1297 hp = &t_host;
1298 hp->h_name = cp;
1299 hp->h_addrtype = AF_INET;
1300 hp->h_length = sizeof (u_long);
1301 hp->h_addr_list = aptr;
1302 aptr[0] = (char *)&saddr;
1303 aptr[1] = (char *)NULL;
1304 }
1305 } else {
1306 syslog(LOG_ERR, "Gethostbyname failed");
1307 return (1);
1308 }
1309 }
1310 grp->gr_type = GT_HOST;
1311 nhp = grp->gr_ptr.gt_hostent = (struct hostent *)
1312 malloc(sizeof(struct hostent));
1313 if (nhp == (struct hostent *)NULL)
1314 out_of_mem();
1315 bcopy((caddr_t)hp, (caddr_t)nhp,
1316 sizeof(struct hostent));
1317 i = strlen(hp->h_name)+1;
1318 nhp->h_name = (char *)malloc(i);
1319 if (nhp->h_name == (char *)NULL)
1320 out_of_mem();
1321 bcopy(hp->h_name, nhp->h_name, i);
1322 addrp = hp->h_addr_list;
1323 i = 1;
1324 while (*addrp++)
1325 i++;
1326 naddrp = nhp->h_addr_list = (char **)
1327 malloc(i*sizeof(char *));
1328 if (naddrp == (char **)NULL)
1329 out_of_mem();
1330 addrp = hp->h_addr_list;
1331 while (*addrp) {
1332 *naddrp = (char *)
1333 malloc(hp->h_length);
1334 if (*naddrp == (char *)NULL)
1335 out_of_mem();
1336 bcopy(*addrp, *naddrp,
1337 hp->h_length);
1338 addrp++;
1339 naddrp++;
1340 }
1341 *naddrp = (char *)NULL;
1342 if (debug)
1343 fprintf(stderr, "got host %s\n", hp->h_name);
1344 return (0);
1345}
1346
1347/*
1348 * Free up an exports list component
1349 */
1350void
1351free_exp(ep)
1352 struct exportlist *ep;
1353{
1354
1355 if (ep->ex_defdir) {
1356 free_host(ep->ex_defdir->dp_hosts);
1357 free((caddr_t)ep->ex_defdir);
1358 }
1359 if (ep->ex_fsdir)
1360 free(ep->ex_fsdir);
1361 free_dir(ep->ex_dirl);
1362 free((caddr_t)ep);
1363}
1364
1365/*
1366 * Free hosts.
1367 */
1368void
1369free_host(hp)
1370 struct hostlist *hp;
1371{
1372 struct hostlist *hp2;
1373
1374 while (hp) {
1375 hp2 = hp;
1376 hp = hp->ht_next;
1377 free((caddr_t)hp2);
1378 }
1379}
1380
1381struct hostlist *
1382get_ht()
1383{
1384 struct hostlist *hp;
1385
1386 hp = (struct hostlist *)malloc(sizeof (struct hostlist));
1387 if (hp == (struct hostlist *)NULL)
1388 out_of_mem();
1389 hp->ht_next = (struct hostlist *)NULL;
1390 return (hp);
1391}
1392
1393#ifdef ISO
1394/*
1395 * Translate an iso address.
1396 */
1397get_isoaddr(cp, grp)
1398 char *cp;
1399 struct grouplist *grp;
1400{
1401 struct iso_addr *isop;
1402 struct sockaddr_iso *isoaddr;
1403
1404 if (grp->gr_type != GT_NULL)
1405 return (1);
1406 if ((isop = iso_addr(cp)) == NULL) {
1407 syslog(LOG_ERR,
1408 "iso_addr failed, ignored");
1409 return (1);
1410 }
1411 isoaddr = (struct sockaddr_iso *)
1412 malloc(sizeof (struct sockaddr_iso));
1413 if (isoaddr == (struct sockaddr_iso *)NULL)
1414 out_of_mem();
1415 bzero((caddr_t)isoaddr, sizeof (struct sockaddr_iso));
1416 bcopy((caddr_t)isop, (caddr_t)&isoaddr->siso_addr,
1417 sizeof (struct iso_addr));
1418 isoaddr->siso_len = sizeof (struct sockaddr_iso);
1419 isoaddr->siso_family = AF_ISO;
1420 grp->gr_type = GT_ISO;
1421 grp->gr_ptr.gt_isoaddr = isoaddr;
1422 return (0);
1423}
1424#endif /* ISO */
1425
1426/*
1427 * Out of memory, fatal
1428 */
1429void
1430out_of_mem()
1431{
1432
1433 syslog(LOG_ERR, "Out of memory");
1434 exit(2);
1435}
1436
1437/*
1438 * Do the mount syscall with the update flag to push the export info into
1439 * the kernel.
1440 */
1441int
1442do_mount(ep, grp, exflags, anoncrp, dirp, dirplen, fsb)
1443 struct exportlist *ep;
1444 struct grouplist *grp;
1445 int exflags;
1446 struct ucred *anoncrp;
1447 char *dirp;
1448 int dirplen;
1449 struct statfs *fsb;
1450{
1451 char *cp = (char *)NULL;
1452 u_long **addrp;
1453 int done;
1454 char savedc = '\0';
1455 struct sockaddr_in sin, imask;
1456 union {
1457 struct ufs_args ua;
1458 struct iso_args ia;
1459 struct mfs_args ma;
1460 } args;
1461 u_long net;
1462
1463 args.ua.fspec = 0;
1464 args.ua.export.ex_flags = exflags;
1465 args.ua.export.ex_anon = *anoncrp;
1466 bzero((char *)&sin, sizeof(sin));
1467 bzero((char *)&imask, sizeof(imask));
1468 sin.sin_family = AF_INET;
1469 sin.sin_len = sizeof(sin);
1470 imask.sin_family = AF_INET;
1471 imask.sin_len = sizeof(sin);
1472 if (grp->gr_type == GT_HOST)
1473 addrp = (u_long **)grp->gr_ptr.gt_hostent->h_addr_list;
1474 else
1475 addrp = (u_long **)NULL;
1476 done = FALSE;
1477 while (!done) {
1478 switch (grp->gr_type) {
1479 case GT_HOST:
1480 if (addrp) {
1481 sin.sin_addr.s_addr = **addrp;
1482 args.ua.export.ex_addrlen = sizeof(sin);
1483 } else
1484 args.ua.export.ex_addrlen = 0;
1485 args.ua.export.ex_addr = (struct sockaddr *)&sin;
1486 args.ua.export.ex_masklen = 0;
1487 break;
1488 case GT_NET:
1489 if (grp->gr_ptr.gt_net.nt_mask)
1490 imask.sin_addr.s_addr = grp->gr_ptr.gt_net.nt_mask;
1491 else {
1492 net = ntohl(grp->gr_ptr.gt_net.nt_net);
1493 if (IN_CLASSA(net))
1494 imask.sin_addr.s_addr = inet_addr("255.0.0.0");
1495 else if (IN_CLASSB(net))
1496 imask.sin_addr.s_addr =
1497 inet_addr("255.255.0.0");
1498 else
1499 imask.sin_addr.s_addr =
1500 inet_addr("255.255.255.0");
1501 grp->gr_ptr.gt_net.nt_mask = imask.sin_addr.s_addr;
1502 }
1503 sin.sin_addr.s_addr = grp->gr_ptr.gt_net.nt_net;
1504 args.ua.export.ex_addr = (struct sockaddr *)&sin;
1505 args.ua.export.ex_addrlen = sizeof (sin);
1506 args.ua.export.ex_mask = (struct sockaddr *)&imask;
1507 args.ua.export.ex_masklen = sizeof (imask);
1508 break;
1509#ifdef ISO
1510 case GT_ISO:
1511 args.ua.export.ex_addr =
1512 (struct sockaddr *)grp->gr_ptr.gt_isoaddr;
1513 args.ua.export.ex_addrlen =
1514 sizeof(struct sockaddr_iso);
1515 args.ua.export.ex_masklen = 0;
1516 break;
1517#endif /* ISO */
1518 default:
1519 syslog(LOG_ERR, "Bad grouptype");
1520 if (cp)
1521 *cp = savedc;
1522 return (1);
1523 };
1524
1525 /*
1526 * XXX:
1527 * Maybe I should just use the fsb->f_mntonname path instead
1528 * of looping back up the dirp to the mount point??
1529 * Also, needs to know how to export all types of local
1530 * exportable file systems and not just MOUNT_UFS.
1531 */
1532 while (mount(fsb->f_type, dirp,
1533 fsb->f_flags | MNT_UPDATE, (caddr_t)&args) < 0) {
1534 if (cp)
1535 *cp-- = savedc;
1536 else
1537 cp = dirp + dirplen - 1;
1538 if (errno == EPERM) {
1539 syslog(LOG_ERR,
1540 "Can't change attributes for %s.\n", dirp);
1541 return (1);
1542 }
1543 if (opt_flags & OP_ALLDIRS) {
1544 syslog(LOG_ERR, "Not root dir");
1545 return (1);
1546 }
1547 /* back up over the last component */
1548 while (*cp == '/' && cp > dirp)
1549 cp--;
1550 while (*(cp - 1) != '/' && cp > dirp)
1551 cp--;
1552 if (cp == dirp) {
1553 if (debug)
1554 fprintf(stderr,"mnt unsucc\n");
1555 syslog(LOG_ERR, "Can't export %s", dirp);
1556 return (1);
1557 }
1558 savedc = *cp;
1559 *cp = '\0';
1560 }
1561 if (addrp) {
1562 ++addrp;
1563 if (*addrp == (u_long *)NULL)
1564 done = TRUE;
1565 } else
1566 done = TRUE;
1567 }
1568 if (cp)
1569 *cp = savedc;
1570 return (0);
1571}
1572
1573/*
1574 * Translate a net address.
1575 */
1576int
1577get_net(cp, net, maskflg)
1578 char *cp;
1579 struct netmsk *net;
1580 int maskflg;
1581{
1582 struct netent *np;
1583 long netaddr;
1584 struct in_addr inetaddr, inetaddr2;
1585 char *name;
1586
1587 if (np = getnetbyname(cp))
1588 inetaddr = inet_makeaddr(np->n_net, 0);
1589 else if (isdigit(*cp)) {
1590 if ((netaddr = inet_network(cp)) == -1)
1591 return (1);
1592 inetaddr = inet_makeaddr(netaddr, 0);
1593 /*
1594 * Due to arbritrary subnet masks, you don't know how many
1595 * bits to shift the address to make it into a network,
1596 * however you do know how to make a network address into
1597 * a host with host == 0 and then compare them.
1598 * (What a pest)
1599 */
1600 if (!maskflg) {
1601 setnetent(0);
1602 while (np = getnetent()) {
1603 inetaddr2 = inet_makeaddr(np->n_net, 0);
1604 if (inetaddr2.s_addr == inetaddr.s_addr)
1605 break;
1606 }
1607 endnetent();
1608 }
1609 } else
1610 return (1);
1611 if (maskflg)
1612 net->nt_mask = inetaddr.s_addr;
1613 else {
1614 if (np)
1615 name = np->n_name;
1616 else
1617 name = inet_ntoa(inetaddr);
1618 net->nt_name = (char *)malloc(strlen(name) + 1);
1619 if (net->nt_name == (char *)NULL)
1620 out_of_mem();
1621 strcpy(net->nt_name, name);
1622 net->nt_net = inetaddr.s_addr;
1623 }
1624 return (0);
1625}
1626
1627/*
1628 * Parse out the next white space separated field
1629 */
1630void
1631nextfield(cp, endcp)
1632 char **cp;
1633 char **endcp;
1634{
1635 char *p;
1636
1637 p = *cp;
1638 while (*p == ' ' || *p == '\t')
1639 p++;
1640 if (*p == '\n' || *p == '\0')
1641 *cp = *endcp = p;
1642 else {
1643 *cp = p++;
1644 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0')
1645 p++;
1646 *endcp = p;
1647 }
1648}
1649
1650/*
1651 * Get an exports file line. Skip over blank lines and handle line
1652 * continuations.
1653 */
1654int
1655get_line()
1656{
1657 char *p, *cp;
1658 int len;
1659 int totlen, cont_line;
1660
1661 /*
1662 * Loop around ignoring blank lines and getting all continuation lines.
1663 */
1664 p = line;
1665 totlen = 0;
1666 do {
1667 if (fgets(p, LINESIZ - totlen, exp_file) == NULL)
1668 return (0);
1669 len = strlen(p);
1670 cp = p + len - 1;
1671 cont_line = 0;
1672 while (cp >= p &&
1673 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) {
1674 if (*cp == '\\')
1675 cont_line = 1;
1676 cp--;
1677 len--;
1678 }
1679 *++cp = '\0';
1680 if (len > 0) {
1681 totlen += len;
1682 if (totlen >= LINESIZ) {
1683 syslog(LOG_ERR, "Exports line too long");
1684 exit(2);
1685 }
1686 p = cp;
1687 }
1688 } while (totlen == 0 || cont_line);
1689 return (1);
1690}
1691
1692/*
1693 * Parse a description of a credential.
1694 */
1695void
1696parsecred(namelist, cr)
1697 char *namelist;
1698 struct ucred *cr;
1699{
1700 char *name;
1701 int cnt;
1702 char *names;
1703 struct passwd *pw;
1704 struct group *gr;
1705 int ngroups, groups[NGROUPS + 1];
1706
1707 /*
1708 * Set up the unpriviledged user.
1709 */
1710 cr->cr_ref = 1;
1711 cr->cr_uid = -2;
1712 cr->cr_groups[0] = -2;
1713 cr->cr_ngroups = 1;
1714 /*
1715 * Get the user's password table entry.
1716 */
1717 names = strsep(&namelist, " \t\n");
1718 name = strsep(&names, ":");
1719 if (isdigit(*name) || *name == '-')
1720 pw = getpwuid(atoi(name));
1721 else
1722 pw = getpwnam(name);
1723 /*
1724 * Credentials specified as those of a user.
1725 */
1726 if (names == NULL) {
1727 if (pw == NULL) {
1728 syslog(LOG_ERR, "Unknown user: %s", name);
1729 return;
1730 }
1731 cr->cr_uid = pw->pw_uid;
1732 ngroups = NGROUPS + 1;
1733 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups))
1734 syslog(LOG_ERR, "Too many groups");
1735 /*
1736 * Convert from int's to gid_t's and compress out duplicate
1737 */
1738 cr->cr_ngroups = ngroups - 1;
1739 cr->cr_groups[0] = groups[0];
1740 for (cnt = 2; cnt < ngroups; cnt++)
1741 cr->cr_groups[cnt - 1] = groups[cnt];
1742 return;
1743 }
1744 /*
1745 * Explicit credential specified as a colon separated list:
1746 * uid:gid:gid:...
1747 */
1748 if (pw != NULL)
1749 cr->cr_uid = pw->pw_uid;
1750 else if (isdigit(*name) || *name == '-')
1751 cr->cr_uid = atoi(name);
1752 else {
1753 syslog(LOG_ERR, "Unknown user: %s", name);
1754 return;
1755 }
1756 cr->cr_ngroups = 0;
1757 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) {
1758 name = strsep(&names, ":");
1759 if (isdigit(*name) || *name == '-') {
1760 cr->cr_groups[cr->cr_ngroups++] = atoi(name);
1761 } else {
1762 if ((gr = getgrnam(name)) == NULL) {
1763 syslog(LOG_ERR, "Unknown group: %s", name);
1764 continue;
1765 }
1766 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid;
1767 }
1768 }
1769 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS)
1770 syslog(LOG_ERR, "Too many groups");
1771}
1772
1773#define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50)
1774/*
1775 * Routines that maintain the remote mounttab
1776 */
1777void
1778get_mountlist()
1779{
1780 struct mountlist *mlp, **mlpp;
1781 char *eos, *dirp;
1782 int len;
1783 char str[STRSIZ];
1784 FILE *mlfile;
1785
1786 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) {
1787 syslog(LOG_ERR, "Can't open %s", _PATH_RMOUNTLIST);
1788 return;
1789 }
1790 mlpp = &mlhead;
1791 while (fgets(str, STRSIZ, mlfile) != NULL) {
1792 if ((dirp = index(str, '\t')) == NULL &&
1793 (dirp = index(str, ' ')) == NULL)
1794 continue;
1795 mlp = (struct mountlist *)malloc(sizeof (*mlp));
1796 len = dirp-str;
1797 if (len > RPCMNT_NAMELEN)
1798 len = RPCMNT_NAMELEN;
1799 bcopy(str, mlp->ml_host, len);
1800 mlp->ml_host[len] = '\0';
1801 while (*dirp == '\t' || *dirp == ' ')
1802 dirp++;
1803 if ((eos = index(dirp, '\t')) == NULL &&
1804 (eos = index(dirp, ' ')) == NULL &&
1805 (eos = index(dirp, '\n')) == NULL)
1806 len = strlen(dirp);
1807 else
1808 len = eos-dirp;
1809 if (len > RPCMNT_PATHLEN)
1810 len = RPCMNT_PATHLEN;
1811 bcopy(dirp, mlp->ml_dirp, len);
1812 mlp->ml_dirp[len] = '\0';
1813 mlp->ml_next = (struct mountlist *)NULL;
1814 *mlpp = mlp;
1815 mlpp = &mlp->ml_next;
1816 }
1817 fclose(mlfile);
1818}
1819
1820void
1821del_mlist(hostp, dirp)
1822 char *hostp, *dirp;
1823{
1824 struct mountlist *mlp, **mlpp;
1825 struct mountlist *mlp2;
1826 FILE *mlfile;
1827 int fnd = 0;
1828
1829 mlpp = &mlhead;
1830 mlp = mlhead;
1831 while (mlp) {
1832 if (!strcmp(mlp->ml_host, hostp) &&
1833 (!dirp || !strcmp(mlp->ml_dirp, dirp))) {
1834 fnd = 1;
1835 mlp2 = mlp;
1836 *mlpp = mlp = mlp->ml_next;
1837 free((caddr_t)mlp2);
1838 } else {
1839 mlpp = &mlp->ml_next;
1840 mlp = mlp->ml_next;
1841 }
1842 }
1843 if (fnd) {
1844 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) {
1845 syslog(LOG_ERR,"Can't update %s", _PATH_RMOUNTLIST);
1846 return;
1847 }
1848 mlp = mlhead;
1849 while (mlp) {
1850 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
1851 mlp = mlp->ml_next;
1852 }
1853 fclose(mlfile);
1854 }
1855}
1856
1857void
1858add_mlist(hostp, dirp)
1859 char *hostp, *dirp;
1860{
1861 struct mountlist *mlp, **mlpp;
1862 FILE *mlfile;
1863
1864 mlpp = &mlhead;
1865 mlp = mlhead;
1866 while (mlp) {
1867 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp))
1868 return;
1869 mlpp = &mlp->ml_next;
1870 mlp = mlp->ml_next;
1871 }
1872 mlp = (struct mountlist *)malloc(sizeof (*mlp));
1873 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN);
1874 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
1875 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
1876 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
1877 mlp->ml_next = (struct mountlist *)NULL;
1878 *mlpp = mlp;
1879 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) {
1880 syslog(LOG_ERR, "Can't update %s", _PATH_RMOUNTLIST);
1881 return;
1882 }
1883 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
1884 fclose(mlfile);
1885}
1886
1887/*
1888 * This function is called via. SIGTERM when the system is going down.
1889 * It sends a broadcast RPCMNT_UMNTALL.
1890 */
1891void
1892send_umntall()
1893{
1894 (void) clnt_broadcast(RPCPROG_MNT, RPCMNT_VER1, RPCMNT_UMNTALL,
1895 xdr_void, (caddr_t)0, xdr_void, (caddr_t)0, umntall_each);
1896 exit(0);
1897}
1898
1899int
1900umntall_each(resultsp, raddr)
1901 caddr_t resultsp;
1902 struct sockaddr_in *raddr;
1903{
1904 return (1);
1905}
1906
1907/*
1908 * Free up a group list.
1909 */
1910void
1911free_grp(grp)
1912 struct grouplist *grp;
1913{
1914 char **addrp;
1915
1916 if (grp->gr_type == GT_HOST) {
1917 if (grp->gr_ptr.gt_hostent->h_name) {
1918 addrp = grp->gr_ptr.gt_hostent->h_addr_list;
1919 while (addrp && *addrp)
1920 free(*addrp++);
1921 free((caddr_t)grp->gr_ptr.gt_hostent->h_addr_list);
1922 free(grp->gr_ptr.gt_hostent->h_name);
1923 }
1924 free((caddr_t)grp->gr_ptr.gt_hostent);
1925 } else if (grp->gr_type == GT_NET) {
1926 if (grp->gr_ptr.gt_net.nt_name)
1927 free(grp->gr_ptr.gt_net.nt_name);
1928 }
1929#ifdef ISO
1930 else if (grp->gr_type == GT_ISO)
1931 free((caddr_t)grp->gr_ptr.gt_isoaddr);
1932#endif
1933 free((caddr_t)grp);
1934}
1935
1936#ifdef DEBUG
1937void
1938SYSLOG(int pri, const char *fmt, ...)
1939{
1940 va_list ap;
1941
1942 va_start(ap, fmt);
1943 vfprintf(stderr, fmt, ap);
1944 va_end(ap);
1945}
1946#endif /* DEBUG */
1947
1948/*
1949 * Check options for consistency.
1950 */
1951int
1952check_options(dp)
1953 struct dirlist *dp;
1954{
1955
1956 if (dp == (struct dirlist *)NULL)
1957 return (1);
1958 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL) ||
1959 (opt_flags & (OP_MAPROOT | OP_KERB)) == (OP_MAPROOT | OP_KERB) ||
1960 (opt_flags & (OP_MAPALL | OP_KERB)) == (OP_MAPALL | OP_KERB)) {
1961 syslog(LOG_ERR, "-mapall, -maproot and -kerb mutually exclusive");
1962 return (1);
1963 }
1964 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) {
1965 syslog(LOG_ERR, "-mask requires -net");
1966 return (1);
1967 }
1968 if ((opt_flags & (OP_NET | OP_ISO)) == (OP_NET | OP_ISO)) {
1969 syslog(LOG_ERR, "-net and -iso mutually exclusive");
1970 return (1);
1971 }
1972 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) {
1973 syslog(LOG_ERR, "-alldir has multiple directories");
1974 return (1);
1975 }
1976 return (0);
1977}
1978
1979/*
1980 * Check an absolute directory path for any symbolic links. Return true
1981 * if no symbolic links are found.
1982 */
1983int
1984check_dirpath(dirp)
1985 char *dirp;
1986{
1987 char *cp;
1988 int ret = 1;
1989 struct stat sb;
1990
1991 cp = dirp + 1;
1992 while (*cp && ret) {
1993 if (*cp == '/') {
1994 *cp = '\0';
1995 if (lstat(dirp, &sb) < 0 ||
1996 (sb.st_mode & S_IFMT) != S_IFDIR)
1997 ret = 0;
1998 *cp = '/';
1999 }
2000 cp++;
2001 }
2002 if (lstat(dirp, &sb) < 0 ||
2003 (sb.st_mode & S_IFMT) != S_IFDIR)
2004 ret = 0;
2005 return (ret);
2006}
| 253 while ((c = getopt(argc, argv, "n")) != EOF)
254 switch (c) {
255 case 'n':
256 root_only = 0;
257 break;
258 default:
259 fprintf(stderr, "Usage: mountd [-n] [export_file]\n");
260 exit(1);
261 };
262 argc -= optind;
263 argv += optind;
264 grphead = (struct grouplist *)NULL;
265 exphead = (struct exportlist *)NULL;
266 mlhead = (struct mountlist *)NULL;
267 if (argc == 1) {
268 strncpy(exname, *argv, MAXPATHLEN-1);
269 exname[MAXPATHLEN-1] = '\0';
270 } else
271 strcpy(exname, _PATH_EXPORTS);
272 openlog("mountd", LOG_PID, LOG_DAEMON);
273 if (debug)
274 fprintf(stderr,"Getting export list.\n");
275 get_exportlist();
276 if (debug)
277 fprintf(stderr,"Getting mount list.\n");
278 get_mountlist();
279 if (debug)
280 fprintf(stderr,"Here we go.\n");
281 if (debug == 0) {
282 daemon(0, 0);
283 signal(SIGINT, SIG_IGN);
284 signal(SIGQUIT, SIG_IGN);
285 }
286 signal(SIGHUP, (void (*) __P((int))) get_exportlist);
287 signal(SIGTERM, (void (*) __P((int))) send_umntall);
288 { FILE *pidfile = fopen(_PATH_MOUNTDPID, "w");
289 if (pidfile != NULL) {
290 fprintf(pidfile, "%d\n", getpid());
291 fclose(pidfile);
292 }
293 }
294 if ((transp = svcudp_create(RPC_ANYSOCK)) == NULL) {
295 syslog(LOG_ERR, "Can't create socket");
296 exit(1);
297 }
298 pmap_unset(RPCPROG_MNT, RPCMNT_VER1);
299 if (!svc_register(transp, RPCPROG_MNT, RPCMNT_VER1, mntsrv,
300 IPPROTO_UDP)) {
301 syslog(LOG_ERR, "Can't register mount");
302 exit(1);
303 }
304 svc_run();
305 syslog(LOG_ERR, "Mountd died");
306 exit(1);
307}
308
309/*
310 * The mount rpc service
311 */
312void
313mntsrv(rqstp, transp)
314 struct svc_req *rqstp;
315 SVCXPRT *transp;
316{
317 struct exportlist *ep;
318 struct dirlist *dp;
319 nfsv2fh_t nfh;
320 struct authunix_parms *ucr;
321 struct stat stb;
322 struct statfs fsb;
323 struct hostent *hp;
324 u_long saddr;
325 char rpcpath[RPCMNT_PATHLEN+1], dirpath[MAXPATHLEN];
326 int bad = ENOENT, omask, defset;
327 uid_t uid = -2;
328
329 /* Get authorization */
330 switch (rqstp->rq_cred.oa_flavor) {
331 case AUTH_UNIX:
332 ucr = (struct authunix_parms *)rqstp->rq_clntcred;
333 uid = ucr->aup_uid;
334 break;
335 case AUTH_NULL:
336 default:
337 break;
338 }
339
340 saddr = transp->xp_raddr.sin_addr.s_addr;
341 hp = (struct hostent *)NULL;
342 switch (rqstp->rq_proc) {
343 case NULLPROC:
344 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL))
345 syslog(LOG_ERR, "Can't send reply");
346 return;
347 case RPCMNT_MOUNT:
348 if ((uid != 0 && root_only) || uid == -2) {
349 svcerr_weakauth(transp);
350 return;
351 }
352 if (!svc_getargs(transp, xdr_dir, rpcpath)) {
353 svcerr_decode(transp);
354 return;
355 }
356
357 /*
358 * Get the real pathname and make sure it is a directory
359 * that exists.
360 */
361 if (realpath(rpcpath, dirpath) == 0 ||
362 stat(dirpath, &stb) < 0 ||
363 (stb.st_mode & S_IFMT) != S_IFDIR ||
364 statfs(dirpath, &fsb) < 0) {
365 chdir("/"); /* Just in case realpath doesn't */
366 if (debug)
367 fprintf(stderr, "stat failed on %s\n", dirpath);
368 if (!svc_sendreply(transp, xdr_long, (caddr_t)&bad))
369 syslog(LOG_ERR, "Can't send reply");
370 return;
371 }
372
373 /* Check in the exports list */
374 omask = sigblock(sigmask(SIGHUP));
375 ep = ex_search(&fsb.f_fsid);
376 defset = 0;
377 if (ep && (chk_host(ep->ex_defdir, saddr, &defset) ||
378 ((dp = dirp_search(ep->ex_dirl, dirpath)) &&
379 chk_host(dp, saddr, &defset)) ||
380 (defset && scan_tree(ep->ex_defdir, saddr) == 0 &&
381 scan_tree(ep->ex_dirl, saddr) == 0))) {
382 /* Get the file handle */
383 bzero((caddr_t)&nfh, sizeof(nfh));
384 if (getfh(dirpath, (fhandle_t *)&nfh) < 0) {
385 bad = errno;
386 syslog(LOG_ERR, "Can't get fh for %s", dirpath);
387 if (!svc_sendreply(transp, xdr_long,
388 (caddr_t)&bad))
389 syslog(LOG_ERR, "Can't send reply");
390 sigsetmask(omask);
391 return;
392 }
393 if (!svc_sendreply(transp, xdr_fhs, (caddr_t)&nfh))
394 syslog(LOG_ERR, "Can't send reply");
395 if (hp == NULL)
396 hp = gethostbyaddr((caddr_t)&saddr,
397 sizeof(saddr), AF_INET);
398 if (hp)
399 add_mlist(hp->h_name, dirpath);
400 else
401 add_mlist(inet_ntoa(transp->xp_raddr.sin_addr),
402 dirpath);
403 if (debug)
404 fprintf(stderr,"Mount successfull.\n");
405 } else {
406 bad = EACCES;
407 if (!svc_sendreply(transp, xdr_long, (caddr_t)&bad))
408 syslog(LOG_ERR, "Can't send reply");
409 }
410 sigsetmask(omask);
411 return;
412 case RPCMNT_DUMP:
413 if (!svc_sendreply(transp, xdr_mlist, (caddr_t)NULL))
414 syslog(LOG_ERR, "Can't send reply");
415 return;
416 case RPCMNT_UMOUNT:
417 if ((uid != 0 && root_only) || uid == -2) {
418 svcerr_weakauth(transp);
419 return;
420 }
421 if (!svc_getargs(transp, xdr_dir, dirpath)) {
422 svcerr_decode(transp);
423 return;
424 }
425 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL))
426 syslog(LOG_ERR, "Can't send reply");
427 hp = gethostbyaddr((caddr_t)&saddr, sizeof(saddr), AF_INET);
428 if (hp)
429 del_mlist(hp->h_name, dirpath);
430 del_mlist(inet_ntoa(transp->xp_raddr.sin_addr), dirpath);
431 return;
432 case RPCMNT_UMNTALL:
433 if ((uid != 0 && root_only) || uid == -2) {
434 svcerr_weakauth(transp);
435 return;
436 }
437 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL))
438 syslog(LOG_ERR, "Can't send reply");
439 hp = gethostbyaddr((caddr_t)&saddr, sizeof(saddr), AF_INET);
440 if (hp)
441 del_mlist(hp->h_name, (char *)NULL);
442 del_mlist(inet_ntoa(transp->xp_raddr.sin_addr), (char *)NULL);
443 return;
444 case RPCMNT_EXPORT:
445 if (!svc_sendreply(transp, xdr_explist, (caddr_t)NULL))
446 syslog(LOG_ERR, "Can't send reply");
447 return;
448 default:
449 svcerr_noproc(transp);
450 return;
451 }
452}
453
454/*
455 * Xdr conversion for a dirpath string
456 */
457int
458xdr_dir(xdrsp, dirp)
459 XDR *xdrsp;
460 char *dirp;
461{
462 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
463}
464
465/*
466 * Xdr routine to generate fhstatus
467 */
468int
469xdr_fhs(xdrsp, nfh)
470 XDR *xdrsp;
471 nfsv2fh_t *nfh;
472{
473 int ok = 0;
474
475 if (!xdr_long(xdrsp, &ok))
476 return (0);
477 return (xdr_opaque(xdrsp, (caddr_t)nfh, NFSX_FH));
478}
479
480int
481xdr_mlist(xdrsp, cp)
482 XDR *xdrsp;
483 caddr_t cp;
484{
485 struct mountlist *mlp;
486 int true = 1;
487 int false = 0;
488 char *strp;
489
490 mlp = mlhead;
491 while (mlp) {
492 if (!xdr_bool(xdrsp, &true))
493 return (0);
494 strp = &mlp->ml_host[0];
495 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
496 return (0);
497 strp = &mlp->ml_dirp[0];
498 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
499 return (0);
500 mlp = mlp->ml_next;
501 }
502 if (!xdr_bool(xdrsp, &false))
503 return (0);
504 return (1);
505}
506
507/*
508 * Xdr conversion for export list
509 */
510int
511xdr_explist(xdrsp, cp)
512 XDR *xdrsp;
513 caddr_t cp;
514{
515 struct exportlist *ep;
516 int false = 0;
517 int omask, putdef;
518
519 omask = sigblock(sigmask(SIGHUP));
520 ep = exphead;
521 while (ep) {
522 putdef = 0;
523 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, &putdef))
524 goto errout;
525 if (ep->ex_defdir && putdef == 0 &&
526 put_exlist(ep->ex_defdir, xdrsp, (struct dirlist *)NULL,
527 &putdef))
528 goto errout;
529 ep = ep->ex_next;
530 }
531 sigsetmask(omask);
532 if (!xdr_bool(xdrsp, &false))
533 return (0);
534 return (1);
535errout:
536 sigsetmask(omask);
537 return (0);
538}
539
540/*
541 * Called from xdr_explist() to traverse the tree and export the
542 * directory paths.
543 */
544int
545put_exlist(dp, xdrsp, adp, putdefp)
546 struct dirlist *dp;
547 XDR *xdrsp;
548 struct dirlist *adp;
549 int *putdefp;
550{
551 struct grouplist *grp;
552 struct hostlist *hp;
553 int true = 1;
554 int false = 0;
555 int gotalldir = 0;
556 char *strp;
557
558 if (dp) {
559 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp))
560 return (1);
561 if (!xdr_bool(xdrsp, &true))
562 return (1);
563 strp = dp->dp_dirp;
564 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
565 return (1);
566 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) {
567 gotalldir = 1;
568 *putdefp = 1;
569 }
570 if ((dp->dp_flag & DP_DEFSET) == 0 &&
571 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) {
572 hp = dp->dp_hosts;
573 while (hp) {
574 grp = hp->ht_grp;
575 if (grp->gr_type == GT_HOST) {
576 if (!xdr_bool(xdrsp, &true))
577 return (1);
578 strp = grp->gr_ptr.gt_hostent->h_name;
579 if (!xdr_string(xdrsp, &strp,
580 RPCMNT_NAMELEN))
581 return (1);
582 } else if (grp->gr_type == GT_NET) {
583 if (!xdr_bool(xdrsp, &true))
584 return (1);
585 strp = grp->gr_ptr.gt_net.nt_name;
586 if (!xdr_string(xdrsp, &strp,
587 RPCMNT_NAMELEN))
588 return (1);
589 }
590 hp = hp->ht_next;
591 if (gotalldir && hp == (struct hostlist *)NULL) {
592 hp = adp->dp_hosts;
593 gotalldir = 0;
594 }
595 }
596 }
597 if (!xdr_bool(xdrsp, &false))
598 return (1);
599 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp))
600 return (1);
601 }
602 return (0);
603}
604
605#define LINESIZ 10240
606char line[LINESIZ];
607FILE *exp_file;
608
609/*
610 * Get the export list
611 */
612void
613get_exportlist()
614{
615 struct exportlist *ep, *ep2;
616 struct grouplist *grp, *tgrp;
617 struct exportlist **epp;
618 struct dirlist *dirhead;
619 struct statfs fsb, *fsp;
620 struct hostent *hpe;
621 struct ucred anon;
622 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc;
623 int len, has_host, exflags, got_nondir, dirplen, num, i, netgrp;
624
625 /*
626 * First, get rid of the old list
627 */
628 ep = exphead;
629 while (ep) {
630 ep2 = ep;
631 ep = ep->ex_next;
632 free_exp(ep2);
633 }
634 exphead = (struct exportlist *)NULL;
635
636 grp = grphead;
637 while (grp) {
638 tgrp = grp;
639 grp = grp->gr_next;
640 free_grp(tgrp);
641 }
642 grphead = (struct grouplist *)NULL;
643
644 /*
645 * And delete exports that are in the kernel for all local
646 * file systems.
647 * XXX: Should know how to handle all local exportable file systems
648 * instead of just MOUNT_UFS.
649 */
650 num = getmntinfo(&fsp, MNT_NOWAIT);
651 for (i = 0; i < num; i++) {
652 union {
653 struct ufs_args ua;
654 struct iso_args ia;
655 struct mfs_args ma;
656 } targs;
657
658 switch (fsp->f_type) {
659 case MOUNT_MFS:
660 case MOUNT_UFS:
661 case MOUNT_CD9660:
662 case MOUNT_MSDOS:
663 targs.ua.fspec = NULL;
664 targs.ua.export.ex_flags = MNT_DELEXPORT;
665 if (mount(fsp->f_type, fsp->f_mntonname,
666 fsp->f_flags | MNT_UPDATE,
667 (caddr_t)&targs) < 0)
668 syslog(LOG_ERR, "Can't delete exports for %s",
669 fsp->f_mntonname);
670 }
671 fsp++;
672 }
673
674 /*
675 * Read in the exports file and build the list, calling
676 * mount() as we go along to push the export rules into the kernel.
677 */
678 if ((exp_file = fopen(exname, "r")) == NULL) {
679 syslog(LOG_ERR, "Can't open %s", exname);
680 exit(2);
681 }
682 dirhead = (struct dirlist *)NULL;
683 while (get_line()) {
684 if (debug)
685 fprintf(stderr,"Got line %s\n",line);
686 cp = line;
687 nextfield(&cp, &endcp);
688 if (*cp == '#')
689 goto nextline;
690
691 /*
692 * Set defaults.
693 */
694 has_host = FALSE;
695 anon = def_anon;
696 exflags = MNT_EXPORTED;
697 got_nondir = 0;
698 opt_flags = 0;
699 ep = (struct exportlist *)NULL;
700
701 /*
702 * Create new exports list entry
703 */
704 len = endcp-cp;
705 tgrp = grp = get_grp();
706 while (len > 0) {
707 if (len > RPCMNT_NAMELEN) {
708 getexp_err(ep, tgrp);
709 goto nextline;
710 }
711 if (*cp == '-') {
712 if (ep == (struct exportlist *)NULL) {
713 getexp_err(ep, tgrp);
714 goto nextline;
715 }
716 if (debug)
717 fprintf(stderr, "doing opt %s\n", cp);
718 got_nondir = 1;
719 if (do_opt(&cp, &endcp, ep, grp, &has_host,
720 &exflags, &anon)) {
721 getexp_err(ep, tgrp);
722 goto nextline;
723 }
724 } else if (*cp == '/') {
725 savedc = *endcp;
726 *endcp = '\0';
727 if (check_dirpath(cp) &&
728 statfs(cp, &fsb) >= 0) {
729 if (got_nondir) {
730 syslog(LOG_ERR, "Dirs must be first");
731 getexp_err(ep, tgrp);
732 goto nextline;
733 }
734 if (ep) {
735 if (ep->ex_fs.val[0] != fsb.f_fsid.val[0] ||
736 ep->ex_fs.val[1] != fsb.f_fsid.val[1]) {
737 getexp_err(ep, tgrp);
738 goto nextline;
739 }
740 } else {
741 /*
742 * See if this directory is already
743 * in the list.
744 */
745 ep = ex_search(&fsb.f_fsid);
746 if (ep == (struct exportlist *)NULL) {
747 ep = get_exp();
748 ep->ex_fs = fsb.f_fsid;
749 ep->ex_fsdir = (char *)
750 malloc(strlen(fsb.f_mntonname) + 1);
751 if (ep->ex_fsdir)
752 strcpy(ep->ex_fsdir,
753 fsb.f_mntonname);
754 else
755 out_of_mem();
756 if (debug)
757 fprintf(stderr,
758 "Making new ep fs=0x%x,0x%x\n",
759 fsb.f_fsid.val[0],
760 fsb.f_fsid.val[1]);
761 } else if (debug)
762 fprintf(stderr,
763 "Found ep fs=0x%x,0x%x\n",
764 fsb.f_fsid.val[0],
765 fsb.f_fsid.val[1]);
766 }
767
768 /*
769 * Add dirpath to export mount point.
770 */
771 dirp = add_expdir(&dirhead, cp, len);
772 dirplen = len;
773 } else {
774 getexp_err(ep, tgrp);
775 goto nextline;
776 }
777 *endcp = savedc;
778 } else {
779 savedc = *endcp;
780 *endcp = '\0';
781 got_nondir = 1;
782 if (ep == (struct exportlist *)NULL) {
783 getexp_err(ep, tgrp);
784 goto nextline;
785 }
786
787 /*
788 * Get the host or netgroup.
789 */
790 setnetgrent(cp);
791 netgrp = getnetgrent(&hst, &usr, &dom);
792 do {
793 if (has_host) {
794 grp->gr_next = get_grp();
795 grp = grp->gr_next;
796 }
797 if (netgrp) {
798 if (get_host(hst, grp)) {
799 syslog(LOG_ERR, "Bad netgroup %s", cp);
800 getexp_err(ep, tgrp);
801 goto nextline;
802 }
803 } else if (get_host(cp, grp)) {
804 getexp_err(ep, tgrp);
805 goto nextline;
806 }
807 has_host = TRUE;
808 } while (netgrp && getnetgrent(&hst, &usr, &dom));
809 endnetgrent();
810 *endcp = savedc;
811 }
812 cp = endcp;
813 nextfield(&cp, &endcp);
814 len = endcp - cp;
815 }
816 if (check_options(dirhead)) {
817 getexp_err(ep, tgrp);
818 goto nextline;
819 }
820 if (!has_host) {
821 grp->gr_type = GT_HOST;
822 if (debug)
823 fprintf(stderr,"Adding a default entry\n");
824 /* add a default group and make the grp list NULL */
825 hpe = (struct hostent *)malloc(sizeof(struct hostent));
826 if (hpe == (struct hostent *)NULL)
827 out_of_mem();
828 hpe->h_name = "Default";
829 hpe->h_addrtype = AF_INET;
830 hpe->h_length = sizeof (u_long);
831 hpe->h_addr_list = (char **)NULL;
832 grp->gr_ptr.gt_hostent = hpe;
833
834 /*
835 * Don't allow a network export coincide with a list of
836 * host(s) on the same line.
837 */
838 } else if ((opt_flags & OP_NET) && tgrp->gr_next) {
839 getexp_err(ep, tgrp);
840 goto nextline;
841 }
842
843 /*
844 * Loop through hosts, pushing the exports into the kernel.
845 * After loop, tgrp points to the start of the list and
846 * grp points to the last entry in the list.
847 */
848 grp = tgrp;
849 do {
850 if (do_mount(ep, grp, exflags, &anon, dirp,
851 dirplen, &fsb)) {
852 getexp_err(ep, tgrp);
853 goto nextline;
854 }
855 } while (grp->gr_next && (grp = grp->gr_next));
856
857 /*
858 * Success. Update the data structures.
859 */
860 if (has_host) {
861 hang_dirp(dirhead, tgrp, ep, (opt_flags & OP_ALLDIRS));
862 grp->gr_next = grphead;
863 grphead = tgrp;
864 } else {
865 hang_dirp(dirhead, (struct grouplist *)NULL, ep,
866 (opt_flags & OP_ALLDIRS));
867 free_grp(grp);
868 }
869 dirhead = (struct dirlist *)NULL;
870 if ((ep->ex_flag & EX_LINKED) == 0) {
871 ep2 = exphead;
872 epp = &exphead;
873
874 /*
875 * Insert in the list in alphabetical order.
876 */
877 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) {
878 epp = &ep2->ex_next;
879 ep2 = ep2->ex_next;
880 }
881 if (ep2)
882 ep->ex_next = ep2;
883 *epp = ep;
884 ep->ex_flag |= EX_LINKED;
885 }
886nextline:
887 if (dirhead) {
888 free_dir(dirhead);
889 dirhead = (struct dirlist *)NULL;
890 }
891 }
892 fclose(exp_file);
893}
894
895/*
896 * Allocate an export list element
897 */
898struct exportlist *
899get_exp()
900{
901 struct exportlist *ep;
902
903 ep = (struct exportlist *)malloc(sizeof (struct exportlist));
904 if (ep == (struct exportlist *)NULL)
905 out_of_mem();
906 bzero((caddr_t)ep, sizeof (struct exportlist));
907 return (ep);
908}
909
910/*
911 * Allocate a group list element
912 */
913struct grouplist *
914get_grp()
915{
916 struct grouplist *gp;
917
918 gp = (struct grouplist *)malloc(sizeof (struct grouplist));
919 if (gp == (struct grouplist *)NULL)
920 out_of_mem();
921 bzero((caddr_t)gp, sizeof (struct grouplist));
922 return (gp);
923}
924
925/*
926 * Clean up upon an error in get_exportlist().
927 */
928void
929getexp_err(ep, grp)
930 struct exportlist *ep;
931 struct grouplist *grp;
932{
933 struct grouplist *tgrp;
934
935 syslog(LOG_ERR, "Bad exports list line %s", line);
936 if (ep && (ep->ex_flag & EX_LINKED) == 0)
937 free_exp(ep);
938 while (grp) {
939 tgrp = grp;
940 grp = grp->gr_next;
941 free_grp(tgrp);
942 }
943}
944
945/*
946 * Search the export list for a matching fs.
947 */
948struct exportlist *
949ex_search(fsid)
950 fsid_t *fsid;
951{
952 struct exportlist *ep;
953
954 ep = exphead;
955 while (ep) {
956 if (ep->ex_fs.val[0] == fsid->val[0] &&
957 ep->ex_fs.val[1] == fsid->val[1])
958 return (ep);
959 ep = ep->ex_next;
960 }
961 return (ep);
962}
963
964/*
965 * Add a directory path to the list.
966 */
967char *
968add_expdir(dpp, cp, len)
969 struct dirlist **dpp;
970 char *cp;
971 int len;
972{
973 struct dirlist *dp;
974
975 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len);
976 dp->dp_left = *dpp;
977 dp->dp_right = (struct dirlist *)NULL;
978 dp->dp_flag = 0;
979 dp->dp_hosts = (struct hostlist *)NULL;
980 strcpy(dp->dp_dirp, cp);
981 *dpp = dp;
982 return (dp->dp_dirp);
983}
984
985/*
986 * Hang the dir list element off the dirpath binary tree as required
987 * and update the entry for host.
988 */
989void
990hang_dirp(dp, grp, ep, alldirs)
991 struct dirlist *dp;
992 struct grouplist *grp;
993 struct exportlist *ep;
994 int alldirs;
995{
996 struct hostlist *hp;
997 struct dirlist *dp2;
998
999 if (alldirs) {
1000 if (ep->ex_defdir)
1001 free((caddr_t)dp);
1002 else
1003 ep->ex_defdir = dp;
1004 if (grp == (struct grouplist *)NULL)
1005 ep->ex_defdir->dp_flag |= DP_DEFSET;
1006 else while (grp) {
1007 hp = get_ht();
1008 hp->ht_grp = grp;
1009 hp->ht_next = ep->ex_defdir->dp_hosts;
1010 ep->ex_defdir->dp_hosts = hp;
1011 grp = grp->gr_next;
1012 }
1013 } else {
1014
1015 /*
1016 * Loop throught the directories adding them to the tree.
1017 */
1018 while (dp) {
1019 dp2 = dp->dp_left;
1020 add_dlist(&ep->ex_dirl, dp, grp);
1021 dp = dp2;
1022 }
1023 }
1024}
1025
1026/*
1027 * Traverse the binary tree either updating a node that is already there
1028 * for the new directory or adding the new node.
1029 */
1030void
1031add_dlist(dpp, newdp, grp)
1032 struct dirlist **dpp;
1033 struct dirlist *newdp;
1034 struct grouplist *grp;
1035{
1036 struct dirlist *dp;
1037 struct hostlist *hp;
1038 int cmp;
1039
1040 dp = *dpp;
1041 if (dp) {
1042 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp);
1043 if (cmp > 0) {
1044 add_dlist(&dp->dp_left, newdp, grp);
1045 return;
1046 } else if (cmp < 0) {
1047 add_dlist(&dp->dp_right, newdp, grp);
1048 return;
1049 } else
1050 free((caddr_t)newdp);
1051 } else {
1052 dp = newdp;
1053 dp->dp_left = (struct dirlist *)NULL;
1054 *dpp = dp;
1055 }
1056 if (grp) {
1057
1058 /*
1059 * Hang all of the host(s) off of the directory point.
1060 */
1061 do {
1062 hp = get_ht();
1063 hp->ht_grp = grp;
1064 hp->ht_next = dp->dp_hosts;
1065 dp->dp_hosts = hp;
1066 grp = grp->gr_next;
1067 } while (grp);
1068 } else
1069 dp->dp_flag |= DP_DEFSET;
1070}
1071
1072/*
1073 * Search for a dirpath on the export point.
1074 */
1075struct dirlist *
1076dirp_search(dp, dirpath)
1077 struct dirlist *dp;
1078 char *dirpath;
1079{
1080 int cmp;
1081
1082 if (dp) {
1083 cmp = strcmp(dp->dp_dirp, dirpath);
1084 if (cmp > 0)
1085 return (dirp_search(dp->dp_left, dirpath));
1086 else if (cmp < 0)
1087 return (dirp_search(dp->dp_right, dirpath));
1088 else
1089 return (dp);
1090 }
1091 return (dp);
1092}
1093
1094/*
1095 * Scan for a host match in a directory tree.
1096 */
1097int
1098chk_host(dp, saddr, defsetp)
1099 struct dirlist *dp;
1100 u_long saddr;
1101 int *defsetp;
1102{
1103 struct hostlist *hp;
1104 struct grouplist *grp;
1105 u_long **addrp;
1106
1107 if (dp) {
1108 if (dp->dp_flag & DP_DEFSET)
1109 *defsetp = 1;
1110 hp = dp->dp_hosts;
1111 while (hp) {
1112 grp = hp->ht_grp;
1113 switch (grp->gr_type) {
1114 case GT_HOST:
1115 addrp = (u_long **)
1116 grp->gr_ptr.gt_hostent->h_addr_list;
1117 while (*addrp) {
1118 if (**addrp == saddr)
1119 return (1);
1120 addrp++;
1121 }
1122 break;
1123 case GT_NET:
1124 if ((saddr & grp->gr_ptr.gt_net.nt_mask) ==
1125 grp->gr_ptr.gt_net.nt_net)
1126 return (1);
1127 break;
1128 };
1129 hp = hp->ht_next;
1130 }
1131 }
1132 return (0);
1133}
1134
1135/*
1136 * Scan tree for a host that matches the address.
1137 */
1138int
1139scan_tree(dp, saddr)
1140 struct dirlist *dp;
1141 u_long saddr;
1142{
1143 int defset;
1144
1145 if (dp) {
1146 if (scan_tree(dp->dp_left, saddr))
1147 return (1);
1148 if (chk_host(dp, saddr, &defset))
1149 return (1);
1150 if (scan_tree(dp->dp_right, saddr))
1151 return (1);
1152 }
1153 return (0);
1154}
1155
1156/*
1157 * Traverse the dirlist tree and free it up.
1158 */
1159void
1160free_dir(dp)
1161 struct dirlist *dp;
1162{
1163
1164 if (dp) {
1165 free_dir(dp->dp_left);
1166 free_dir(dp->dp_right);
1167 free_host(dp->dp_hosts);
1168 free((caddr_t)dp);
1169 }
1170}
1171
1172/*
1173 * Parse the option string and update fields.
1174 * Option arguments may either be -<option>=<value> or
1175 * -<option> <value>
1176 */
1177int
1178do_opt(cpp, endcpp, ep, grp, has_hostp, exflagsp, cr)
1179 char **cpp, **endcpp;
1180 struct exportlist *ep;
1181 struct grouplist *grp;
1182 int *has_hostp;
1183 int *exflagsp;
1184 struct ucred *cr;
1185{
1186 char *cpoptarg, *cpoptend;
1187 char *cp, *endcp, *cpopt, savedc, savedc2;
1188 int allflag, usedarg;
1189
1190 cpopt = *cpp;
1191 cpopt++;
1192 cp = *endcpp;
1193 savedc = *cp;
1194 *cp = '\0';
1195 while (cpopt && *cpopt) {
1196 allflag = 1;
1197 usedarg = -2;
1198 if (cpoptend = index(cpopt, ',')) {
1199 *cpoptend++ = '\0';
1200 if (cpoptarg = index(cpopt, '='))
1201 *cpoptarg++ = '\0';
1202 } else {
1203 if (cpoptarg = index(cpopt, '='))
1204 *cpoptarg++ = '\0';
1205 else {
1206 *cp = savedc;
1207 nextfield(&cp, &endcp);
1208 **endcpp = '\0';
1209 if (endcp > cp && *cp != '-') {
1210 cpoptarg = cp;
1211 savedc2 = *endcp;
1212 *endcp = '\0';
1213 usedarg = 0;
1214 }
1215 }
1216 }
1217 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) {
1218 *exflagsp |= MNT_EXRDONLY;
1219 } else if (cpoptarg && (!strcmp(cpopt, "maproot") ||
1220 !(allflag = strcmp(cpopt, "mapall")) ||
1221 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) {
1222 usedarg++;
1223 parsecred(cpoptarg, cr);
1224 if (allflag == 0) {
1225 *exflagsp |= MNT_EXPORTANON;
1226 opt_flags |= OP_MAPALL;
1227 } else
1228 opt_flags |= OP_MAPROOT;
1229 } else if (!strcmp(cpopt, "kerb") || !strcmp(cpopt, "k")) {
1230 *exflagsp |= MNT_EXKERB;
1231 opt_flags |= OP_KERB;
1232 } else if (cpoptarg && (!strcmp(cpopt, "mask") ||
1233 !strcmp(cpopt, "m"))) {
1234 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) {
1235 syslog(LOG_ERR, "Bad mask: %s", cpoptarg);
1236 return (1);
1237 }
1238 usedarg++;
1239 opt_flags |= OP_MASK;
1240 } else if (cpoptarg && (!strcmp(cpopt, "network") ||
1241 !strcmp(cpopt, "n"))) {
1242 if (grp->gr_type != GT_NULL) {
1243 syslog(LOG_ERR, "Network/host conflict");
1244 return (1);
1245 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) {
1246 syslog(LOG_ERR, "Bad net: %s", cpoptarg);
1247 return (1);
1248 }
1249 grp->gr_type = GT_NET;
1250 *has_hostp = 1;
1251 usedarg++;
1252 opt_flags |= OP_NET;
1253 } else if (!strcmp(cpopt, "alldirs")) {
1254 opt_flags |= OP_ALLDIRS;
1255#ifdef ISO
1256 } else if (cpoptarg && !strcmp(cpopt, "iso")) {
1257 if (get_isoaddr(cpoptarg, grp)) {
1258 syslog(LOG_ERR, "Bad iso addr: %s", cpoptarg);
1259 return (1);
1260 }
1261 *has_hostp = 1;
1262 usedarg++;
1263 opt_flags |= OP_ISO;
1264#endif /* ISO */
1265 } else {
1266 syslog(LOG_ERR, "Bad opt %s", cpopt);
1267 return (1);
1268 }
1269 if (usedarg >= 0) {
1270 *endcp = savedc2;
1271 **endcpp = savedc;
1272 if (usedarg > 0) {
1273 *cpp = cp;
1274 *endcpp = endcp;
1275 }
1276 return (0);
1277 }
1278 cpopt = cpoptend;
1279 }
1280 **endcpp = savedc;
1281 return (0);
1282}
1283
1284/*
1285 * Translate a character string to the corresponding list of network
1286 * addresses for a hostname.
1287 */
1288int
1289get_host(cp, grp)
1290 char *cp;
1291 struct grouplist *grp;
1292{
1293 struct hostent *hp, *nhp;
1294 char **addrp, **naddrp;
1295 struct hostent t_host;
1296 int i;
1297 u_long saddr;
1298 char *aptr[2];
1299
1300 if (grp->gr_type != GT_NULL)
1301 return (1);
1302 if ((hp = gethostbyname(cp)) == NULL) {
1303 if (isdigit(*cp)) {
1304 saddr = inet_addr(cp);
1305 if (saddr == -1) {
1306 syslog(LOG_ERR, "Inet_addr failed");
1307 return (1);
1308 }
1309 if ((hp = gethostbyaddr((caddr_t)&saddr, sizeof (saddr),
1310 AF_INET)) == NULL) {
1311 hp = &t_host;
1312 hp->h_name = cp;
1313 hp->h_addrtype = AF_INET;
1314 hp->h_length = sizeof (u_long);
1315 hp->h_addr_list = aptr;
1316 aptr[0] = (char *)&saddr;
1317 aptr[1] = (char *)NULL;
1318 }
1319 } else {
1320 syslog(LOG_ERR, "Gethostbyname failed");
1321 return (1);
1322 }
1323 }
1324 grp->gr_type = GT_HOST;
1325 nhp = grp->gr_ptr.gt_hostent = (struct hostent *)
1326 malloc(sizeof(struct hostent));
1327 if (nhp == (struct hostent *)NULL)
1328 out_of_mem();
1329 bcopy((caddr_t)hp, (caddr_t)nhp,
1330 sizeof(struct hostent));
1331 i = strlen(hp->h_name)+1;
1332 nhp->h_name = (char *)malloc(i);
1333 if (nhp->h_name == (char *)NULL)
1334 out_of_mem();
1335 bcopy(hp->h_name, nhp->h_name, i);
1336 addrp = hp->h_addr_list;
1337 i = 1;
1338 while (*addrp++)
1339 i++;
1340 naddrp = nhp->h_addr_list = (char **)
1341 malloc(i*sizeof(char *));
1342 if (naddrp == (char **)NULL)
1343 out_of_mem();
1344 addrp = hp->h_addr_list;
1345 while (*addrp) {
1346 *naddrp = (char *)
1347 malloc(hp->h_length);
1348 if (*naddrp == (char *)NULL)
1349 out_of_mem();
1350 bcopy(*addrp, *naddrp,
1351 hp->h_length);
1352 addrp++;
1353 naddrp++;
1354 }
1355 *naddrp = (char *)NULL;
1356 if (debug)
1357 fprintf(stderr, "got host %s\n", hp->h_name);
1358 return (0);
1359}
1360
1361/*
1362 * Free up an exports list component
1363 */
1364void
1365free_exp(ep)
1366 struct exportlist *ep;
1367{
1368
1369 if (ep->ex_defdir) {
1370 free_host(ep->ex_defdir->dp_hosts);
1371 free((caddr_t)ep->ex_defdir);
1372 }
1373 if (ep->ex_fsdir)
1374 free(ep->ex_fsdir);
1375 free_dir(ep->ex_dirl);
1376 free((caddr_t)ep);
1377}
1378
1379/*
1380 * Free hosts.
1381 */
1382void
1383free_host(hp)
1384 struct hostlist *hp;
1385{
1386 struct hostlist *hp2;
1387
1388 while (hp) {
1389 hp2 = hp;
1390 hp = hp->ht_next;
1391 free((caddr_t)hp2);
1392 }
1393}
1394
1395struct hostlist *
1396get_ht()
1397{
1398 struct hostlist *hp;
1399
1400 hp = (struct hostlist *)malloc(sizeof (struct hostlist));
1401 if (hp == (struct hostlist *)NULL)
1402 out_of_mem();
1403 hp->ht_next = (struct hostlist *)NULL;
1404 return (hp);
1405}
1406
1407#ifdef ISO
1408/*
1409 * Translate an iso address.
1410 */
1411get_isoaddr(cp, grp)
1412 char *cp;
1413 struct grouplist *grp;
1414{
1415 struct iso_addr *isop;
1416 struct sockaddr_iso *isoaddr;
1417
1418 if (grp->gr_type != GT_NULL)
1419 return (1);
1420 if ((isop = iso_addr(cp)) == NULL) {
1421 syslog(LOG_ERR,
1422 "iso_addr failed, ignored");
1423 return (1);
1424 }
1425 isoaddr = (struct sockaddr_iso *)
1426 malloc(sizeof (struct sockaddr_iso));
1427 if (isoaddr == (struct sockaddr_iso *)NULL)
1428 out_of_mem();
1429 bzero((caddr_t)isoaddr, sizeof (struct sockaddr_iso));
1430 bcopy((caddr_t)isop, (caddr_t)&isoaddr->siso_addr,
1431 sizeof (struct iso_addr));
1432 isoaddr->siso_len = sizeof (struct sockaddr_iso);
1433 isoaddr->siso_family = AF_ISO;
1434 grp->gr_type = GT_ISO;
1435 grp->gr_ptr.gt_isoaddr = isoaddr;
1436 return (0);
1437}
1438#endif /* ISO */
1439
1440/*
1441 * Out of memory, fatal
1442 */
1443void
1444out_of_mem()
1445{
1446
1447 syslog(LOG_ERR, "Out of memory");
1448 exit(2);
1449}
1450
1451/*
1452 * Do the mount syscall with the update flag to push the export info into
1453 * the kernel.
1454 */
1455int
1456do_mount(ep, grp, exflags, anoncrp, dirp, dirplen, fsb)
1457 struct exportlist *ep;
1458 struct grouplist *grp;
1459 int exflags;
1460 struct ucred *anoncrp;
1461 char *dirp;
1462 int dirplen;
1463 struct statfs *fsb;
1464{
1465 char *cp = (char *)NULL;
1466 u_long **addrp;
1467 int done;
1468 char savedc = '\0';
1469 struct sockaddr_in sin, imask;
1470 union {
1471 struct ufs_args ua;
1472 struct iso_args ia;
1473 struct mfs_args ma;
1474 } args;
1475 u_long net;
1476
1477 args.ua.fspec = 0;
1478 args.ua.export.ex_flags = exflags;
1479 args.ua.export.ex_anon = *anoncrp;
1480 bzero((char *)&sin, sizeof(sin));
1481 bzero((char *)&imask, sizeof(imask));
1482 sin.sin_family = AF_INET;
1483 sin.sin_len = sizeof(sin);
1484 imask.sin_family = AF_INET;
1485 imask.sin_len = sizeof(sin);
1486 if (grp->gr_type == GT_HOST)
1487 addrp = (u_long **)grp->gr_ptr.gt_hostent->h_addr_list;
1488 else
1489 addrp = (u_long **)NULL;
1490 done = FALSE;
1491 while (!done) {
1492 switch (grp->gr_type) {
1493 case GT_HOST:
1494 if (addrp) {
1495 sin.sin_addr.s_addr = **addrp;
1496 args.ua.export.ex_addrlen = sizeof(sin);
1497 } else
1498 args.ua.export.ex_addrlen = 0;
1499 args.ua.export.ex_addr = (struct sockaddr *)&sin;
1500 args.ua.export.ex_masklen = 0;
1501 break;
1502 case GT_NET:
1503 if (grp->gr_ptr.gt_net.nt_mask)
1504 imask.sin_addr.s_addr = grp->gr_ptr.gt_net.nt_mask;
1505 else {
1506 net = ntohl(grp->gr_ptr.gt_net.nt_net);
1507 if (IN_CLASSA(net))
1508 imask.sin_addr.s_addr = inet_addr("255.0.0.0");
1509 else if (IN_CLASSB(net))
1510 imask.sin_addr.s_addr =
1511 inet_addr("255.255.0.0");
1512 else
1513 imask.sin_addr.s_addr =
1514 inet_addr("255.255.255.0");
1515 grp->gr_ptr.gt_net.nt_mask = imask.sin_addr.s_addr;
1516 }
1517 sin.sin_addr.s_addr = grp->gr_ptr.gt_net.nt_net;
1518 args.ua.export.ex_addr = (struct sockaddr *)&sin;
1519 args.ua.export.ex_addrlen = sizeof (sin);
1520 args.ua.export.ex_mask = (struct sockaddr *)&imask;
1521 args.ua.export.ex_masklen = sizeof (imask);
1522 break;
1523#ifdef ISO
1524 case GT_ISO:
1525 args.ua.export.ex_addr =
1526 (struct sockaddr *)grp->gr_ptr.gt_isoaddr;
1527 args.ua.export.ex_addrlen =
1528 sizeof(struct sockaddr_iso);
1529 args.ua.export.ex_masklen = 0;
1530 break;
1531#endif /* ISO */
1532 default:
1533 syslog(LOG_ERR, "Bad grouptype");
1534 if (cp)
1535 *cp = savedc;
1536 return (1);
1537 };
1538
1539 /*
1540 * XXX:
1541 * Maybe I should just use the fsb->f_mntonname path instead
1542 * of looping back up the dirp to the mount point??
1543 * Also, needs to know how to export all types of local
1544 * exportable file systems and not just MOUNT_UFS.
1545 */
1546 while (mount(fsb->f_type, dirp,
1547 fsb->f_flags | MNT_UPDATE, (caddr_t)&args) < 0) {
1548 if (cp)
1549 *cp-- = savedc;
1550 else
1551 cp = dirp + dirplen - 1;
1552 if (errno == EPERM) {
1553 syslog(LOG_ERR,
1554 "Can't change attributes for %s.\n", dirp);
1555 return (1);
1556 }
1557 if (opt_flags & OP_ALLDIRS) {
1558 syslog(LOG_ERR, "Not root dir");
1559 return (1);
1560 }
1561 /* back up over the last component */
1562 while (*cp == '/' && cp > dirp)
1563 cp--;
1564 while (*(cp - 1) != '/' && cp > dirp)
1565 cp--;
1566 if (cp == dirp) {
1567 if (debug)
1568 fprintf(stderr,"mnt unsucc\n");
1569 syslog(LOG_ERR, "Can't export %s", dirp);
1570 return (1);
1571 }
1572 savedc = *cp;
1573 *cp = '\0';
1574 }
1575 if (addrp) {
1576 ++addrp;
1577 if (*addrp == (u_long *)NULL)
1578 done = TRUE;
1579 } else
1580 done = TRUE;
1581 }
1582 if (cp)
1583 *cp = savedc;
1584 return (0);
1585}
1586
1587/*
1588 * Translate a net address.
1589 */
1590int
1591get_net(cp, net, maskflg)
1592 char *cp;
1593 struct netmsk *net;
1594 int maskflg;
1595{
1596 struct netent *np;
1597 long netaddr;
1598 struct in_addr inetaddr, inetaddr2;
1599 char *name;
1600
1601 if (np = getnetbyname(cp))
1602 inetaddr = inet_makeaddr(np->n_net, 0);
1603 else if (isdigit(*cp)) {
1604 if ((netaddr = inet_network(cp)) == -1)
1605 return (1);
1606 inetaddr = inet_makeaddr(netaddr, 0);
1607 /*
1608 * Due to arbritrary subnet masks, you don't know how many
1609 * bits to shift the address to make it into a network,
1610 * however you do know how to make a network address into
1611 * a host with host == 0 and then compare them.
1612 * (What a pest)
1613 */
1614 if (!maskflg) {
1615 setnetent(0);
1616 while (np = getnetent()) {
1617 inetaddr2 = inet_makeaddr(np->n_net, 0);
1618 if (inetaddr2.s_addr == inetaddr.s_addr)
1619 break;
1620 }
1621 endnetent();
1622 }
1623 } else
1624 return (1);
1625 if (maskflg)
1626 net->nt_mask = inetaddr.s_addr;
1627 else {
1628 if (np)
1629 name = np->n_name;
1630 else
1631 name = inet_ntoa(inetaddr);
1632 net->nt_name = (char *)malloc(strlen(name) + 1);
1633 if (net->nt_name == (char *)NULL)
1634 out_of_mem();
1635 strcpy(net->nt_name, name);
1636 net->nt_net = inetaddr.s_addr;
1637 }
1638 return (0);
1639}
1640
1641/*
1642 * Parse out the next white space separated field
1643 */
1644void
1645nextfield(cp, endcp)
1646 char **cp;
1647 char **endcp;
1648{
1649 char *p;
1650
1651 p = *cp;
1652 while (*p == ' ' || *p == '\t')
1653 p++;
1654 if (*p == '\n' || *p == '\0')
1655 *cp = *endcp = p;
1656 else {
1657 *cp = p++;
1658 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0')
1659 p++;
1660 *endcp = p;
1661 }
1662}
1663
1664/*
1665 * Get an exports file line. Skip over blank lines and handle line
1666 * continuations.
1667 */
1668int
1669get_line()
1670{
1671 char *p, *cp;
1672 int len;
1673 int totlen, cont_line;
1674
1675 /*
1676 * Loop around ignoring blank lines and getting all continuation lines.
1677 */
1678 p = line;
1679 totlen = 0;
1680 do {
1681 if (fgets(p, LINESIZ - totlen, exp_file) == NULL)
1682 return (0);
1683 len = strlen(p);
1684 cp = p + len - 1;
1685 cont_line = 0;
1686 while (cp >= p &&
1687 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) {
1688 if (*cp == '\\')
1689 cont_line = 1;
1690 cp--;
1691 len--;
1692 }
1693 *++cp = '\0';
1694 if (len > 0) {
1695 totlen += len;
1696 if (totlen >= LINESIZ) {
1697 syslog(LOG_ERR, "Exports line too long");
1698 exit(2);
1699 }
1700 p = cp;
1701 }
1702 } while (totlen == 0 || cont_line);
1703 return (1);
1704}
1705
1706/*
1707 * Parse a description of a credential.
1708 */
1709void
1710parsecred(namelist, cr)
1711 char *namelist;
1712 struct ucred *cr;
1713{
1714 char *name;
1715 int cnt;
1716 char *names;
1717 struct passwd *pw;
1718 struct group *gr;
1719 int ngroups, groups[NGROUPS + 1];
1720
1721 /*
1722 * Set up the unpriviledged user.
1723 */
1724 cr->cr_ref = 1;
1725 cr->cr_uid = -2;
1726 cr->cr_groups[0] = -2;
1727 cr->cr_ngroups = 1;
1728 /*
1729 * Get the user's password table entry.
1730 */
1731 names = strsep(&namelist, " \t\n");
1732 name = strsep(&names, ":");
1733 if (isdigit(*name) || *name == '-')
1734 pw = getpwuid(atoi(name));
1735 else
1736 pw = getpwnam(name);
1737 /*
1738 * Credentials specified as those of a user.
1739 */
1740 if (names == NULL) {
1741 if (pw == NULL) {
1742 syslog(LOG_ERR, "Unknown user: %s", name);
1743 return;
1744 }
1745 cr->cr_uid = pw->pw_uid;
1746 ngroups = NGROUPS + 1;
1747 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups))
1748 syslog(LOG_ERR, "Too many groups");
1749 /*
1750 * Convert from int's to gid_t's and compress out duplicate
1751 */
1752 cr->cr_ngroups = ngroups - 1;
1753 cr->cr_groups[0] = groups[0];
1754 for (cnt = 2; cnt < ngroups; cnt++)
1755 cr->cr_groups[cnt - 1] = groups[cnt];
1756 return;
1757 }
1758 /*
1759 * Explicit credential specified as a colon separated list:
1760 * uid:gid:gid:...
1761 */
1762 if (pw != NULL)
1763 cr->cr_uid = pw->pw_uid;
1764 else if (isdigit(*name) || *name == '-')
1765 cr->cr_uid = atoi(name);
1766 else {
1767 syslog(LOG_ERR, "Unknown user: %s", name);
1768 return;
1769 }
1770 cr->cr_ngroups = 0;
1771 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) {
1772 name = strsep(&names, ":");
1773 if (isdigit(*name) || *name == '-') {
1774 cr->cr_groups[cr->cr_ngroups++] = atoi(name);
1775 } else {
1776 if ((gr = getgrnam(name)) == NULL) {
1777 syslog(LOG_ERR, "Unknown group: %s", name);
1778 continue;
1779 }
1780 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid;
1781 }
1782 }
1783 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS)
1784 syslog(LOG_ERR, "Too many groups");
1785}
1786
1787#define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50)
1788/*
1789 * Routines that maintain the remote mounttab
1790 */
1791void
1792get_mountlist()
1793{
1794 struct mountlist *mlp, **mlpp;
1795 char *eos, *dirp;
1796 int len;
1797 char str[STRSIZ];
1798 FILE *mlfile;
1799
1800 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) {
1801 syslog(LOG_ERR, "Can't open %s", _PATH_RMOUNTLIST);
1802 return;
1803 }
1804 mlpp = &mlhead;
1805 while (fgets(str, STRSIZ, mlfile) != NULL) {
1806 if ((dirp = index(str, '\t')) == NULL &&
1807 (dirp = index(str, ' ')) == NULL)
1808 continue;
1809 mlp = (struct mountlist *)malloc(sizeof (*mlp));
1810 len = dirp-str;
1811 if (len > RPCMNT_NAMELEN)
1812 len = RPCMNT_NAMELEN;
1813 bcopy(str, mlp->ml_host, len);
1814 mlp->ml_host[len] = '\0';
1815 while (*dirp == '\t' || *dirp == ' ')
1816 dirp++;
1817 if ((eos = index(dirp, '\t')) == NULL &&
1818 (eos = index(dirp, ' ')) == NULL &&
1819 (eos = index(dirp, '\n')) == NULL)
1820 len = strlen(dirp);
1821 else
1822 len = eos-dirp;
1823 if (len > RPCMNT_PATHLEN)
1824 len = RPCMNT_PATHLEN;
1825 bcopy(dirp, mlp->ml_dirp, len);
1826 mlp->ml_dirp[len] = '\0';
1827 mlp->ml_next = (struct mountlist *)NULL;
1828 *mlpp = mlp;
1829 mlpp = &mlp->ml_next;
1830 }
1831 fclose(mlfile);
1832}
1833
1834void
1835del_mlist(hostp, dirp)
1836 char *hostp, *dirp;
1837{
1838 struct mountlist *mlp, **mlpp;
1839 struct mountlist *mlp2;
1840 FILE *mlfile;
1841 int fnd = 0;
1842
1843 mlpp = &mlhead;
1844 mlp = mlhead;
1845 while (mlp) {
1846 if (!strcmp(mlp->ml_host, hostp) &&
1847 (!dirp || !strcmp(mlp->ml_dirp, dirp))) {
1848 fnd = 1;
1849 mlp2 = mlp;
1850 *mlpp = mlp = mlp->ml_next;
1851 free((caddr_t)mlp2);
1852 } else {
1853 mlpp = &mlp->ml_next;
1854 mlp = mlp->ml_next;
1855 }
1856 }
1857 if (fnd) {
1858 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) {
1859 syslog(LOG_ERR,"Can't update %s", _PATH_RMOUNTLIST);
1860 return;
1861 }
1862 mlp = mlhead;
1863 while (mlp) {
1864 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
1865 mlp = mlp->ml_next;
1866 }
1867 fclose(mlfile);
1868 }
1869}
1870
1871void
1872add_mlist(hostp, dirp)
1873 char *hostp, *dirp;
1874{
1875 struct mountlist *mlp, **mlpp;
1876 FILE *mlfile;
1877
1878 mlpp = &mlhead;
1879 mlp = mlhead;
1880 while (mlp) {
1881 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp))
1882 return;
1883 mlpp = &mlp->ml_next;
1884 mlp = mlp->ml_next;
1885 }
1886 mlp = (struct mountlist *)malloc(sizeof (*mlp));
1887 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN);
1888 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
1889 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
1890 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
1891 mlp->ml_next = (struct mountlist *)NULL;
1892 *mlpp = mlp;
1893 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) {
1894 syslog(LOG_ERR, "Can't update %s", _PATH_RMOUNTLIST);
1895 return;
1896 }
1897 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
1898 fclose(mlfile);
1899}
1900
1901/*
1902 * This function is called via. SIGTERM when the system is going down.
1903 * It sends a broadcast RPCMNT_UMNTALL.
1904 */
1905void
1906send_umntall()
1907{
1908 (void) clnt_broadcast(RPCPROG_MNT, RPCMNT_VER1, RPCMNT_UMNTALL,
1909 xdr_void, (caddr_t)0, xdr_void, (caddr_t)0, umntall_each);
1910 exit(0);
1911}
1912
1913int
1914umntall_each(resultsp, raddr)
1915 caddr_t resultsp;
1916 struct sockaddr_in *raddr;
1917{
1918 return (1);
1919}
1920
1921/*
1922 * Free up a group list.
1923 */
1924void
1925free_grp(grp)
1926 struct grouplist *grp;
1927{
1928 char **addrp;
1929
1930 if (grp->gr_type == GT_HOST) {
1931 if (grp->gr_ptr.gt_hostent->h_name) {
1932 addrp = grp->gr_ptr.gt_hostent->h_addr_list;
1933 while (addrp && *addrp)
1934 free(*addrp++);
1935 free((caddr_t)grp->gr_ptr.gt_hostent->h_addr_list);
1936 free(grp->gr_ptr.gt_hostent->h_name);
1937 }
1938 free((caddr_t)grp->gr_ptr.gt_hostent);
1939 } else if (grp->gr_type == GT_NET) {
1940 if (grp->gr_ptr.gt_net.nt_name)
1941 free(grp->gr_ptr.gt_net.nt_name);
1942 }
1943#ifdef ISO
1944 else if (grp->gr_type == GT_ISO)
1945 free((caddr_t)grp->gr_ptr.gt_isoaddr);
1946#endif
1947 free((caddr_t)grp);
1948}
1949
1950#ifdef DEBUG
1951void
1952SYSLOG(int pri, const char *fmt, ...)
1953{
1954 va_list ap;
1955
1956 va_start(ap, fmt);
1957 vfprintf(stderr, fmt, ap);
1958 va_end(ap);
1959}
1960#endif /* DEBUG */
1961
1962/*
1963 * Check options for consistency.
1964 */
1965int
1966check_options(dp)
1967 struct dirlist *dp;
1968{
1969
1970 if (dp == (struct dirlist *)NULL)
1971 return (1);
1972 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL) ||
1973 (opt_flags & (OP_MAPROOT | OP_KERB)) == (OP_MAPROOT | OP_KERB) ||
1974 (opt_flags & (OP_MAPALL | OP_KERB)) == (OP_MAPALL | OP_KERB)) {
1975 syslog(LOG_ERR, "-mapall, -maproot and -kerb mutually exclusive");
1976 return (1);
1977 }
1978 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) {
1979 syslog(LOG_ERR, "-mask requires -net");
1980 return (1);
1981 }
1982 if ((opt_flags & (OP_NET | OP_ISO)) == (OP_NET | OP_ISO)) {
1983 syslog(LOG_ERR, "-net and -iso mutually exclusive");
1984 return (1);
1985 }
1986 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) {
1987 syslog(LOG_ERR, "-alldir has multiple directories");
1988 return (1);
1989 }
1990 return (0);
1991}
1992
1993/*
1994 * Check an absolute directory path for any symbolic links. Return true
1995 * if no symbolic links are found.
1996 */
1997int
1998check_dirpath(dirp)
1999 char *dirp;
2000{
2001 char *cp;
2002 int ret = 1;
2003 struct stat sb;
2004
2005 cp = dirp + 1;
2006 while (*cp && ret) {
2007 if (*cp == '/') {
2008 *cp = '\0';
2009 if (lstat(dirp, &sb) < 0 ||
2010 (sb.st_mode & S_IFMT) != S_IFDIR)
2011 ret = 0;
2012 *cp = '/';
2013 }
2014 cp++;
2015 }
2016 if (lstat(dirp, &sb) < 0 ||
2017 (sb.st_mode & S_IFMT) != S_IFDIR)
2018 ret = 0;
2019 return (ret);
2020}
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