mountd.c revision 32656
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 1.27 1997/12/13 19:50:14 guido 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 (get_host(hst, grp, tgrp)) { 917 syslog(LOG_ERR, "Bad host %s in netgroup %s, skipping", hst, cp); 918 grp->gr_type = GT_IGNORE; 919 } 920 } else if (get_host(cp, grp, tgrp)) { 921 syslog(LOG_ERR, "Bad host %s, skipping", cp); 922 grp->gr_type = GT_IGNORE; 923 } 924 has_host = TRUE; 925 } while (netgrp && getnetgrent(&hst, &usr, &dom)); 926 endnetgrent(); 927 *endcp = savedc; 928 } 929 cp = endcp; 930 nextfield(&cp, &endcp); 931 len = endcp - cp; 932 } 933 if (check_options(dirhead)) { 934 getexp_err(ep, tgrp); 935 goto nextline; 936 } 937 if (!has_host) { 938 grp->gr_type = GT_HOST; 939 if (debug) 940 fprintf(stderr,"Adding a default entry\n"); 941 /* add a default group and make the grp list NULL */ 942 hpe = (struct hostent *)malloc(sizeof(struct hostent)); 943 if (hpe == (struct hostent *)NULL) 944 out_of_mem(); 945 hpe->h_name = strdup("Default"); 946 hpe->h_addrtype = AF_INET; 947 hpe->h_length = sizeof (u_long); 948 hpe->h_addr_list = (char **)NULL; 949 grp->gr_ptr.gt_hostent = hpe; 950 951 /* 952 * Don't allow a network export coincide with a list of 953 * host(s) on the same line. 954 */ 955 } else if ((opt_flags & OP_NET) && tgrp->gr_next) { 956 getexp_err(ep, tgrp); 957 goto nextline; 958 959 /* 960 * If an export list was specified on this line, make sure 961 * that we have at least one valid entry, otherwise skip it. 962 */ 963 } else { 964 grp = tgrp; 965 while (grp && grp->gr_type == GT_IGNORE) 966 grp = grp->gr_next; 967 if (! grp) { 968 getexp_err(ep, tgrp); 969 goto nextline; 970 } 971 } 972 973 /* 974 * Loop through hosts, pushing the exports into the kernel. 975 * After loop, tgrp points to the start of the list and 976 * grp points to the last entry in the list. 977 */ 978 grp = tgrp; 979 do { 980 if (do_mount(ep, grp, exflags, &anon, dirp, 981 dirplen, &fsb)) { 982 getexp_err(ep, tgrp); 983 goto nextline; 984 } 985 } while (grp->gr_next && (grp = grp->gr_next)); 986 987 /* 988 * Success. Update the data structures. 989 */ 990 if (has_host) { 991 hang_dirp(dirhead, tgrp, ep, opt_flags); 992 grp->gr_next = grphead; 993 grphead = tgrp; 994 } else { 995 hang_dirp(dirhead, (struct grouplist *)NULL, ep, 996 opt_flags); 997 free_grp(grp); 998 } 999 dirhead = (struct dirlist *)NULL; 1000 if ((ep->ex_flag & EX_LINKED) == 0) { 1001 ep2 = exphead; 1002 epp = &exphead; 1003 1004 /* 1005 * Insert in the list in alphabetical order. 1006 */ 1007 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) { 1008 epp = &ep2->ex_next; 1009 ep2 = ep2->ex_next; 1010 } 1011 if (ep2) 1012 ep->ex_next = ep2; 1013 *epp = ep; 1014 ep->ex_flag |= EX_LINKED; 1015 } 1016nextline: 1017 if (dirhead) { 1018 free_dir(dirhead); 1019 dirhead = (struct dirlist *)NULL; 1020 } 1021 } 1022 fclose(exp_file); 1023} 1024 1025/* 1026 * Allocate an export list element 1027 */ 1028struct exportlist * 1029get_exp() 1030{ 1031 struct exportlist *ep; 1032 1033 ep = (struct exportlist *)malloc(sizeof (struct exportlist)); 1034 if (ep == (struct exportlist *)NULL) 1035 out_of_mem(); 1036 memset(ep, 0, sizeof(struct exportlist)); 1037 return (ep); 1038} 1039 1040/* 1041 * Allocate a group list element 1042 */ 1043struct grouplist * 1044get_grp() 1045{ 1046 struct grouplist *gp; 1047 1048 gp = (struct grouplist *)malloc(sizeof (struct grouplist)); 1049 if (gp == (struct grouplist *)NULL) 1050 out_of_mem(); 1051 memset(gp, 0, sizeof(struct grouplist)); 1052 return (gp); 1053} 1054 1055/* 1056 * Clean up upon an error in get_exportlist(). 1057 */ 1058void 1059getexp_err(ep, grp) 1060 struct exportlist *ep; 1061 struct grouplist *grp; 1062{ 1063 struct grouplist *tgrp; 1064 1065 syslog(LOG_ERR, "Bad exports list line %s", line); 1066 if (ep && (ep->ex_flag & EX_LINKED) == 0) 1067 free_exp(ep); 1068 while (grp) { 1069 tgrp = grp; 1070 grp = grp->gr_next; 1071 free_grp(tgrp); 1072 } 1073} 1074 1075/* 1076 * Search the export list for a matching fs. 1077 */ 1078struct exportlist * 1079ex_search(fsid) 1080 fsid_t *fsid; 1081{ 1082 struct exportlist *ep; 1083 1084 ep = exphead; 1085 while (ep) { 1086 if (ep->ex_fs.val[0] == fsid->val[0] && 1087 ep->ex_fs.val[1] == fsid->val[1]) 1088 return (ep); 1089 ep = ep->ex_next; 1090 } 1091 return (ep); 1092} 1093 1094/* 1095 * Add a directory path to the list. 1096 */ 1097char * 1098add_expdir(dpp, cp, len) 1099 struct dirlist **dpp; 1100 char *cp; 1101 int len; 1102{ 1103 struct dirlist *dp; 1104 1105 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len); 1106 dp->dp_left = *dpp; 1107 dp->dp_right = (struct dirlist *)NULL; 1108 dp->dp_flag = 0; 1109 dp->dp_hosts = (struct hostlist *)NULL; 1110 strcpy(dp->dp_dirp, cp); 1111 *dpp = dp; 1112 return (dp->dp_dirp); 1113} 1114 1115/* 1116 * Hang the dir list element off the dirpath binary tree as required 1117 * and update the entry for host. 1118 */ 1119void 1120hang_dirp(dp, grp, ep, flags) 1121 struct dirlist *dp; 1122 struct grouplist *grp; 1123 struct exportlist *ep; 1124 int flags; 1125{ 1126 struct hostlist *hp; 1127 struct dirlist *dp2; 1128 1129 if (flags & OP_ALLDIRS) { 1130 if (ep->ex_defdir) 1131 free((caddr_t)dp); 1132 else 1133 ep->ex_defdir = dp; 1134 if (grp == (struct grouplist *)NULL) { 1135 ep->ex_defdir->dp_flag |= DP_DEFSET; 1136 if (flags & OP_KERB) 1137 ep->ex_defdir->dp_flag |= DP_KERB; 1138 } else while (grp) { 1139 hp = get_ht(); 1140 if (flags & OP_KERB) 1141 hp->ht_flag |= DP_KERB; 1142 hp->ht_grp = grp; 1143 hp->ht_next = ep->ex_defdir->dp_hosts; 1144 ep->ex_defdir->dp_hosts = hp; 1145 grp = grp->gr_next; 1146 } 1147 } else { 1148 1149 /* 1150 * Loop throught the directories adding them to the tree. 1151 */ 1152 while (dp) { 1153 dp2 = dp->dp_left; 1154 add_dlist(&ep->ex_dirl, dp, grp, flags); 1155 dp = dp2; 1156 } 1157 } 1158} 1159 1160/* 1161 * Traverse the binary tree either updating a node that is already there 1162 * for the new directory or adding the new node. 1163 */ 1164void 1165add_dlist(dpp, newdp, grp, flags) 1166 struct dirlist **dpp; 1167 struct dirlist *newdp; 1168 struct grouplist *grp; 1169 int flags; 1170{ 1171 struct dirlist *dp; 1172 struct hostlist *hp; 1173 int cmp; 1174 1175 dp = *dpp; 1176 if (dp) { 1177 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); 1178 if (cmp > 0) { 1179 add_dlist(&dp->dp_left, newdp, grp, flags); 1180 return; 1181 } else if (cmp < 0) { 1182 add_dlist(&dp->dp_right, newdp, grp, flags); 1183 return; 1184 } else 1185 free((caddr_t)newdp); 1186 } else { 1187 dp = newdp; 1188 dp->dp_left = (struct dirlist *)NULL; 1189 *dpp = dp; 1190 } 1191 if (grp) { 1192 1193 /* 1194 * Hang all of the host(s) off of the directory point. 1195 */ 1196 do { 1197 hp = get_ht(); 1198 if (flags & OP_KERB) 1199 hp->ht_flag |= DP_KERB; 1200 hp->ht_grp = grp; 1201 hp->ht_next = dp->dp_hosts; 1202 dp->dp_hosts = hp; 1203 grp = grp->gr_next; 1204 } while (grp); 1205 } else { 1206 dp->dp_flag |= DP_DEFSET; 1207 if (flags & OP_KERB) 1208 dp->dp_flag |= DP_KERB; 1209 } 1210} 1211 1212/* 1213 * Search for a dirpath on the export point. 1214 */ 1215struct dirlist * 1216dirp_search(dp, dirpath) 1217 struct dirlist *dp; 1218 char *dirpath; 1219{ 1220 int cmp; 1221 1222 if (dp) { 1223 cmp = strcmp(dp->dp_dirp, dirpath); 1224 if (cmp > 0) 1225 return (dirp_search(dp->dp_left, dirpath)); 1226 else if (cmp < 0) 1227 return (dirp_search(dp->dp_right, dirpath)); 1228 else 1229 return (dp); 1230 } 1231 return (dp); 1232} 1233 1234/* 1235 * Scan for a host match in a directory tree. 1236 */ 1237int 1238chk_host(dp, saddr, defsetp, hostsetp) 1239 struct dirlist *dp; 1240 u_long saddr; 1241 int *defsetp; 1242 int *hostsetp; 1243{ 1244 struct hostlist *hp; 1245 struct grouplist *grp; 1246 u_long **addrp; 1247 1248 if (dp) { 1249 if (dp->dp_flag & DP_DEFSET) 1250 *defsetp = dp->dp_flag; 1251 hp = dp->dp_hosts; 1252 while (hp) { 1253 grp = hp->ht_grp; 1254 switch (grp->gr_type) { 1255 case GT_HOST: 1256 addrp = (u_long **) 1257 grp->gr_ptr.gt_hostent->h_addr_list; 1258 while (*addrp) { 1259 if (**addrp == saddr) { 1260 *hostsetp = (hp->ht_flag | DP_HOSTSET); 1261 return (1); 1262 } 1263 addrp++; 1264 } 1265 break; 1266 case GT_NET: 1267 if ((saddr & grp->gr_ptr.gt_net.nt_mask) == 1268 grp->gr_ptr.gt_net.nt_net) { 1269 *hostsetp = (hp->ht_flag | DP_HOSTSET); 1270 return (1); 1271 } 1272 break; 1273 }; 1274 hp = hp->ht_next; 1275 } 1276 } 1277 return (0); 1278} 1279 1280/* 1281 * Scan tree for a host that matches the address. 1282 */ 1283int 1284scan_tree(dp, saddr) 1285 struct dirlist *dp; 1286 u_long saddr; 1287{ 1288 int defset, hostset; 1289 1290 if (dp) { 1291 if (scan_tree(dp->dp_left, saddr)) 1292 return (1); 1293 if (chk_host(dp, saddr, &defset, &hostset)) 1294 return (1); 1295 if (scan_tree(dp->dp_right, saddr)) 1296 return (1); 1297 } 1298 return (0); 1299} 1300 1301/* 1302 * Traverse the dirlist tree and free it up. 1303 */ 1304void 1305free_dir(dp) 1306 struct dirlist *dp; 1307{ 1308 1309 if (dp) { 1310 free_dir(dp->dp_left); 1311 free_dir(dp->dp_right); 1312 free_host(dp->dp_hosts); 1313 free((caddr_t)dp); 1314 } 1315} 1316 1317/* 1318 * Parse the option string and update fields. 1319 * Option arguments may either be -<option>=<value> or 1320 * -<option> <value> 1321 */ 1322int 1323do_opt(cpp, endcpp, ep, grp, has_hostp, exflagsp, cr) 1324 char **cpp, **endcpp; 1325 struct exportlist *ep; 1326 struct grouplist *grp; 1327 int *has_hostp; 1328 int *exflagsp; 1329 struct ucred *cr; 1330{ 1331 char *cpoptarg, *cpoptend; 1332 char *cp, *endcp, *cpopt, savedc, savedc2; 1333 int allflag, usedarg; 1334 1335 cpopt = *cpp; 1336 cpopt++; 1337 cp = *endcpp; 1338 savedc = *cp; 1339 *cp = '\0'; 1340 while (cpopt && *cpopt) { 1341 allflag = 1; 1342 usedarg = -2; 1343 if (cpoptend = strchr(cpopt, ',')) { 1344 *cpoptend++ = '\0'; 1345 if (cpoptarg = strchr(cpopt, '=')) 1346 *cpoptarg++ = '\0'; 1347 } else { 1348 if (cpoptarg = strchr(cpopt, '=')) 1349 *cpoptarg++ = '\0'; 1350 else { 1351 *cp = savedc; 1352 nextfield(&cp, &endcp); 1353 **endcpp = '\0'; 1354 if (endcp > cp && *cp != '-') { 1355 cpoptarg = cp; 1356 savedc2 = *endcp; 1357 *endcp = '\0'; 1358 usedarg = 0; 1359 } 1360 } 1361 } 1362 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { 1363 *exflagsp |= MNT_EXRDONLY; 1364 } else if (cpoptarg && (!strcmp(cpopt, "maproot") || 1365 !(allflag = strcmp(cpopt, "mapall")) || 1366 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { 1367 usedarg++; 1368 parsecred(cpoptarg, cr); 1369 if (allflag == 0) { 1370 *exflagsp |= MNT_EXPORTANON; 1371 opt_flags |= OP_MAPALL; 1372 } else 1373 opt_flags |= OP_MAPROOT; 1374 } else if (!strcmp(cpopt, "kerb") || !strcmp(cpopt, "k")) { 1375 *exflagsp |= MNT_EXKERB; 1376 opt_flags |= OP_KERB; 1377 } else if (cpoptarg && (!strcmp(cpopt, "mask") || 1378 !strcmp(cpopt, "m"))) { 1379 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { 1380 syslog(LOG_ERR, "Bad mask: %s", cpoptarg); 1381 return (1); 1382 } 1383 usedarg++; 1384 opt_flags |= OP_MASK; 1385 } else if (cpoptarg && (!strcmp(cpopt, "network") || 1386 !strcmp(cpopt, "n"))) { 1387 if (grp->gr_type != GT_NULL) { 1388 syslog(LOG_ERR, "Network/host conflict"); 1389 return (1); 1390 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { 1391 syslog(LOG_ERR, "Bad net: %s", cpoptarg); 1392 return (1); 1393 } 1394 grp->gr_type = GT_NET; 1395 *has_hostp = 1; 1396 usedarg++; 1397 opt_flags |= OP_NET; 1398 } else if (!strcmp(cpopt, "alldirs")) { 1399 opt_flags |= OP_ALLDIRS; 1400 } else if (!strcmp(cpopt, "public")) { 1401 *exflagsp |= MNT_EXPUBLIC; 1402 } else if (!strcmp(cpopt, "webnfs")) { 1403 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON); 1404 opt_flags |= OP_MAPALL; 1405 } else if (cpoptarg && !strcmp(cpopt, "index")) { 1406 ep->ex_indexfile = strdup(cpoptarg); 1407#ifdef ISO 1408 } else if (cpoptarg && !strcmp(cpopt, "iso")) { 1409 if (get_isoaddr(cpoptarg, grp)) { 1410 syslog(LOG_ERR, "Bad iso addr: %s", cpoptarg); 1411 return (1); 1412 } 1413 *has_hostp = 1; 1414 usedarg++; 1415 opt_flags |= OP_ISO; 1416#endif /* ISO */ 1417 } else { 1418 syslog(LOG_ERR, "Bad opt %s", cpopt); 1419 return (1); 1420 } 1421 if (usedarg >= 0) { 1422 *endcp = savedc2; 1423 **endcpp = savedc; 1424 if (usedarg > 0) { 1425 *cpp = cp; 1426 *endcpp = endcp; 1427 } 1428 return (0); 1429 } 1430 cpopt = cpoptend; 1431 } 1432 **endcpp = savedc; 1433 return (0); 1434} 1435 1436/* 1437 * Translate a character string to the corresponding list of network 1438 * addresses for a hostname. 1439 */ 1440int 1441get_host(cp, grp, tgrp) 1442 char *cp; 1443 struct grouplist *grp; 1444 struct grouplist *tgrp; 1445{ 1446 struct grouplist *checkgrp; 1447 struct hostent *hp, *nhp; 1448 char **addrp, **naddrp; 1449 struct hostent t_host; 1450 int i; 1451 u_long saddr; 1452 char *aptr[2]; 1453 1454 if (grp->gr_type != GT_NULL) 1455 return (1); 1456 if ((hp = gethostbyname(cp)) == NULL) { 1457 if (isdigit(*cp)) { 1458 saddr = inet_addr(cp); 1459 if (saddr == -1) { 1460 syslog(LOG_ERR, "Inet_addr failed for %s", cp); 1461 return (1); 1462 } 1463 if ((hp = gethostbyaddr((caddr_t)&saddr, sizeof (saddr), 1464 AF_INET)) == NULL) { 1465 hp = &t_host; 1466 hp->h_name = cp; 1467 hp->h_addrtype = AF_INET; 1468 hp->h_length = sizeof (u_long); 1469 hp->h_addr_list = aptr; 1470 aptr[0] = (char *)&saddr; 1471 aptr[1] = (char *)NULL; 1472 } 1473 } else { 1474 syslog(LOG_ERR, "Gethostbyname failed for %s", cp); 1475 return (1); 1476 } 1477 } 1478 /* 1479 * Sanity check: make sure we don't already have an entry 1480 * for this host in the grouplist. 1481 */ 1482 checkgrp = tgrp; 1483 while (checkgrp) { 1484 if (checkgrp->gr_type == GT_HOST && 1485 checkgrp->gr_ptr.gt_hostent != NULL && 1486 !strcmp(checkgrp->gr_ptr.gt_hostent->h_name, hp->h_name)) { 1487 grp->gr_type = GT_IGNORE; 1488 return(0); 1489 } 1490 checkgrp = checkgrp->gr_next; 1491 } 1492 1493 grp->gr_type = GT_HOST; 1494 nhp = grp->gr_ptr.gt_hostent = (struct hostent *) 1495 malloc(sizeof(struct hostent)); 1496 if (nhp == (struct hostent *)NULL) 1497 out_of_mem(); 1498 memmove(nhp, hp, sizeof(struct hostent)); 1499 i = strlen(hp->h_name)+1; 1500 nhp->h_name = (char *)malloc(i); 1501 if (nhp->h_name == (char *)NULL) 1502 out_of_mem(); 1503 memmove(nhp->h_name, hp->h_name, i); 1504 addrp = hp->h_addr_list; 1505 i = 1; 1506 while (*addrp++) 1507 i++; 1508 naddrp = nhp->h_addr_list = (char **) 1509 malloc(i*sizeof(char *)); 1510 if (naddrp == (char **)NULL) 1511 out_of_mem(); 1512 addrp = hp->h_addr_list; 1513 while (*addrp) { 1514 *naddrp = (char *) 1515 malloc(hp->h_length); 1516 if (*naddrp == (char *)NULL) 1517 out_of_mem(); 1518 memmove(*naddrp, *addrp, hp->h_length); 1519 addrp++; 1520 naddrp++; 1521 } 1522 *naddrp = (char *)NULL; 1523 if (debug) 1524 fprintf(stderr, "got host %s\n", hp->h_name); 1525 return (0); 1526} 1527 1528/* 1529 * Free up an exports list component 1530 */ 1531void 1532free_exp(ep) 1533 struct exportlist *ep; 1534{ 1535 1536 if (ep->ex_defdir) { 1537 free_host(ep->ex_defdir->dp_hosts); 1538 free((caddr_t)ep->ex_defdir); 1539 } 1540 if (ep->ex_fsdir) 1541 free(ep->ex_fsdir); 1542 if (ep->ex_indexfile) 1543 free(ep->ex_indexfile); 1544 free_dir(ep->ex_dirl); 1545 free((caddr_t)ep); 1546} 1547 1548/* 1549 * Free hosts. 1550 */ 1551void 1552free_host(hp) 1553 struct hostlist *hp; 1554{ 1555 struct hostlist *hp2; 1556 1557 while (hp) { 1558 hp2 = hp; 1559 hp = hp->ht_next; 1560 free((caddr_t)hp2); 1561 } 1562} 1563 1564struct hostlist * 1565get_ht() 1566{ 1567 struct hostlist *hp; 1568 1569 hp = (struct hostlist *)malloc(sizeof (struct hostlist)); 1570 if (hp == (struct hostlist *)NULL) 1571 out_of_mem(); 1572 hp->ht_next = (struct hostlist *)NULL; 1573 hp->ht_flag = 0; 1574 return (hp); 1575} 1576 1577#ifdef ISO 1578/* 1579 * Translate an iso address. 1580 */ 1581get_isoaddr(cp, grp) 1582 char *cp; 1583 struct grouplist *grp; 1584{ 1585 struct iso_addr *isop; 1586 struct sockaddr_iso *isoaddr; 1587 1588 if (grp->gr_type != GT_NULL) 1589 return (1); 1590 if ((isop = iso_addr(cp)) == NULL) { 1591 syslog(LOG_ERR, 1592 "iso_addr failed, ignored"); 1593 return (1); 1594 } 1595 isoaddr = (struct sockaddr_iso *) 1596 malloc(sizeof (struct sockaddr_iso)); 1597 if (isoaddr == (struct sockaddr_iso *)NULL) 1598 out_of_mem(); 1599 memset(isoaddr, 0, sizeof(struct sockaddr_iso)); 1600 memmove(&isoaddr->siso_addr, isop, sizeof(struct iso_addr)); 1601 isoaddr->siso_len = sizeof(struct sockaddr_iso); 1602 isoaddr->siso_family = AF_ISO; 1603 grp->gr_type = GT_ISO; 1604 grp->gr_ptr.gt_isoaddr = isoaddr; 1605 return (0); 1606} 1607#endif /* ISO */ 1608 1609/* 1610 * Out of memory, fatal 1611 */ 1612void 1613out_of_mem() 1614{ 1615 1616 syslog(LOG_ERR, "Out of memory"); 1617 exit(2); 1618} 1619 1620/* 1621 * Do the mount syscall with the update flag to push the export info into 1622 * the kernel. 1623 */ 1624int 1625do_mount(ep, grp, exflags, anoncrp, dirp, dirplen, fsb) 1626 struct exportlist *ep; 1627 struct grouplist *grp; 1628 int exflags; 1629 struct ucred *anoncrp; 1630 char *dirp; 1631 int dirplen; 1632 struct statfs *fsb; 1633{ 1634 char *cp = (char *)NULL; 1635 u_long **addrp; 1636 int done; 1637 char savedc = '\0'; 1638 struct sockaddr_in sin, imask; 1639 union { 1640 struct ufs_args ua; 1641 struct iso_args ia; 1642 struct mfs_args ma; 1643#ifdef __NetBSD__ 1644 struct msdosfs_args da; 1645#endif 1646 } args; 1647 u_long net; 1648 1649 args.ua.fspec = 0; 1650 args.ua.export.ex_flags = exflags; 1651 args.ua.export.ex_anon = *anoncrp; 1652 args.ua.export.ex_indexfile = ep->ex_indexfile; 1653 memset(&sin, 0, sizeof(sin)); 1654 memset(&imask, 0, sizeof(imask)); 1655 sin.sin_family = AF_INET; 1656 sin.sin_len = sizeof(sin); 1657 imask.sin_family = AF_INET; 1658 imask.sin_len = sizeof(sin); 1659 if (grp->gr_type == GT_HOST) 1660 addrp = (u_long **)grp->gr_ptr.gt_hostent->h_addr_list; 1661 else 1662 addrp = (u_long **)NULL; 1663 done = FALSE; 1664 while (!done) { 1665 switch (grp->gr_type) { 1666 case GT_HOST: 1667 if (addrp) { 1668 sin.sin_addr.s_addr = **addrp; 1669 args.ua.export.ex_addrlen = sizeof(sin); 1670 } else 1671 args.ua.export.ex_addrlen = 0; 1672 args.ua.export.ex_addr = (struct sockaddr *)&sin; 1673 args.ua.export.ex_masklen = 0; 1674 break; 1675 case GT_NET: 1676 if (grp->gr_ptr.gt_net.nt_mask) 1677 imask.sin_addr.s_addr = grp->gr_ptr.gt_net.nt_mask; 1678 else { 1679 net = ntohl(grp->gr_ptr.gt_net.nt_net); 1680 if (IN_CLASSA(net)) 1681 imask.sin_addr.s_addr = inet_addr("255.0.0.0"); 1682 else if (IN_CLASSB(net)) 1683 imask.sin_addr.s_addr = 1684 inet_addr("255.255.0.0"); 1685 else 1686 imask.sin_addr.s_addr = 1687 inet_addr("255.255.255.0"); 1688 grp->gr_ptr.gt_net.nt_mask = imask.sin_addr.s_addr; 1689 } 1690 sin.sin_addr.s_addr = grp->gr_ptr.gt_net.nt_net; 1691 args.ua.export.ex_addr = (struct sockaddr *)&sin; 1692 args.ua.export.ex_addrlen = sizeof (sin); 1693 args.ua.export.ex_mask = (struct sockaddr *)&imask; 1694 args.ua.export.ex_masklen = sizeof (imask); 1695 break; 1696#ifdef ISO 1697 case GT_ISO: 1698 args.ua.export.ex_addr = 1699 (struct sockaddr *)grp->gr_ptr.gt_isoaddr; 1700 args.ua.export.ex_addrlen = 1701 sizeof(struct sockaddr_iso); 1702 args.ua.export.ex_masklen = 0; 1703 break; 1704#endif /* ISO */ 1705 case GT_IGNORE: 1706 return(0); 1707 break; 1708 default: 1709 syslog(LOG_ERR, "Bad grouptype"); 1710 if (cp) 1711 *cp = savedc; 1712 return (1); 1713 }; 1714 1715 /* 1716 * XXX: 1717 * Maybe I should just use the fsb->f_mntonname path instead 1718 * of looping back up the dirp to the mount point?? 1719 * Also, needs to know how to export all types of local 1720 * exportable file systems and not just "ufs". 1721 */ 1722 while (mount(fsb->f_fstypename, dirp, 1723 fsb->f_flags | MNT_UPDATE, (caddr_t)&args) < 0) { 1724 if (cp) 1725 *cp-- = savedc; 1726 else 1727 cp = dirp + dirplen - 1; 1728 if (errno == EPERM) { 1729 syslog(LOG_ERR, 1730 "Can't change attributes for %s.\n", dirp); 1731 return (1); 1732 } 1733 if (opt_flags & OP_ALLDIRS) { 1734 syslog(LOG_ERR, "Could not remount %s: %m", 1735 dirp); 1736 return (1); 1737 } 1738 /* back up over the last component */ 1739 while (*cp == '/' && cp > dirp) 1740 cp--; 1741 while (*(cp - 1) != '/' && cp > dirp) 1742 cp--; 1743 if (cp == dirp) { 1744 if (debug) 1745 fprintf(stderr,"mnt unsucc\n"); 1746 syslog(LOG_ERR, "Can't export %s", dirp); 1747 return (1); 1748 } 1749 savedc = *cp; 1750 *cp = '\0'; 1751 } 1752 if (addrp) { 1753 ++addrp; 1754 if (*addrp == (u_long *)NULL) 1755 done = TRUE; 1756 } else 1757 done = TRUE; 1758 } 1759 if (cp) 1760 *cp = savedc; 1761 return (0); 1762} 1763 1764/* 1765 * Translate a net address. 1766 */ 1767int 1768get_net(cp, net, maskflg) 1769 char *cp; 1770 struct netmsk *net; 1771 int maskflg; 1772{ 1773 struct netent *np; 1774 long netaddr; 1775 struct in_addr inetaddr, inetaddr2; 1776 char *name; 1777 1778 if (isdigit(*cp) && ((netaddr = inet_network(cp)) != -1)) { 1779 inetaddr = inet_makeaddr(netaddr, 0); 1780 /* 1781 * Due to arbritrary subnet masks, you don't know how many 1782 * bits to shift the address to make it into a network, 1783 * however you do know how to make a network address into 1784 * a host with host == 0 and then compare them. 1785 * (What a pest) 1786 */ 1787 if (!maskflg) { 1788 setnetent(0); 1789 while (np = getnetent()) { 1790 inetaddr2 = inet_makeaddr(np->n_net, 0); 1791 if (inetaddr2.s_addr == inetaddr.s_addr) 1792 break; 1793 } 1794 endnetent(); 1795 } 1796 } else if ((np = getnetbyname(cp)) != NULL) { 1797 inetaddr = inet_makeaddr(np->n_net, 0); 1798 } else 1799 return (1); 1800 1801 if (maskflg) 1802 net->nt_mask = inetaddr.s_addr; 1803 else { 1804 if (np) 1805 name = np->n_name; 1806 else 1807 name = inet_ntoa(inetaddr); 1808 net->nt_name = (char *)malloc(strlen(name) + 1); 1809 if (net->nt_name == (char *)NULL) 1810 out_of_mem(); 1811 strcpy(net->nt_name, name); 1812 net->nt_net = inetaddr.s_addr; 1813 } 1814 return (0); 1815} 1816 1817/* 1818 * Parse out the next white space separated field 1819 */ 1820void 1821nextfield(cp, endcp) 1822 char **cp; 1823 char **endcp; 1824{ 1825 char *p; 1826 1827 p = *cp; 1828 while (*p == ' ' || *p == '\t') 1829 p++; 1830 if (*p == '\n' || *p == '\0') 1831 *cp = *endcp = p; 1832 else { 1833 *cp = p++; 1834 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') 1835 p++; 1836 *endcp = p; 1837 } 1838} 1839 1840/* 1841 * Get an exports file line. Skip over blank lines and handle line 1842 * continuations. 1843 */ 1844int 1845get_line() 1846{ 1847 char *p, *cp; 1848 int len; 1849 int totlen, cont_line; 1850 1851 /* 1852 * Loop around ignoring blank lines and getting all continuation lines. 1853 */ 1854 p = line; 1855 totlen = 0; 1856 do { 1857 if (fgets(p, LINESIZ - totlen, exp_file) == NULL) 1858 return (0); 1859 len = strlen(p); 1860 cp = p + len - 1; 1861 cont_line = 0; 1862 while (cp >= p && 1863 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) { 1864 if (*cp == '\\') 1865 cont_line = 1; 1866 cp--; 1867 len--; 1868 } 1869 *++cp = '\0'; 1870 if (len > 0) { 1871 totlen += len; 1872 if (totlen >= LINESIZ) { 1873 syslog(LOG_ERR, "Exports line too long"); 1874 exit(2); 1875 } 1876 p = cp; 1877 } 1878 } while (totlen == 0 || cont_line); 1879 return (1); 1880} 1881 1882/* 1883 * Parse a description of a credential. 1884 */ 1885void 1886parsecred(namelist, cr) 1887 char *namelist; 1888 struct ucred *cr; 1889{ 1890 char *name; 1891 int cnt; 1892 char *names; 1893 struct passwd *pw; 1894 struct group *gr; 1895 int ngroups, groups[NGROUPS + 1]; 1896 1897 /* 1898 * Set up the unpriviledged user. 1899 */ 1900 cr->cr_ref = 1; 1901 cr->cr_uid = -2; 1902 cr->cr_groups[0] = -2; 1903 cr->cr_ngroups = 1; 1904 /* 1905 * Get the user's password table entry. 1906 */ 1907 names = strsep(&namelist, " \t\n"); 1908 name = strsep(&names, ":"); 1909 if (isdigit(*name) || *name == '-') 1910 pw = getpwuid(atoi(name)); 1911 else 1912 pw = getpwnam(name); 1913 /* 1914 * Credentials specified as those of a user. 1915 */ 1916 if (names == NULL) { 1917 if (pw == NULL) { 1918 syslog(LOG_ERR, "Unknown user: %s", name); 1919 return; 1920 } 1921 cr->cr_uid = pw->pw_uid; 1922 ngroups = NGROUPS + 1; 1923 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) 1924 syslog(LOG_ERR, "Too many groups"); 1925 /* 1926 * Convert from int's to gid_t's and compress out duplicate 1927 */ 1928 cr->cr_ngroups = ngroups - 1; 1929 cr->cr_groups[0] = groups[0]; 1930 for (cnt = 2; cnt < ngroups; cnt++) 1931 cr->cr_groups[cnt - 1] = groups[cnt]; 1932 return; 1933 } 1934 /* 1935 * Explicit credential specified as a colon separated list: 1936 * uid:gid:gid:... 1937 */ 1938 if (pw != NULL) 1939 cr->cr_uid = pw->pw_uid; 1940 else if (isdigit(*name) || *name == '-') 1941 cr->cr_uid = atoi(name); 1942 else { 1943 syslog(LOG_ERR, "Unknown user: %s", name); 1944 return; 1945 } 1946 cr->cr_ngroups = 0; 1947 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) { 1948 name = strsep(&names, ":"); 1949 if (isdigit(*name) || *name == '-') { 1950 cr->cr_groups[cr->cr_ngroups++] = atoi(name); 1951 } else { 1952 if ((gr = getgrnam(name)) == NULL) { 1953 syslog(LOG_ERR, "Unknown group: %s", name); 1954 continue; 1955 } 1956 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid; 1957 } 1958 } 1959 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS) 1960 syslog(LOG_ERR, "Too many groups"); 1961} 1962 1963#define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50) 1964/* 1965 * Routines that maintain the remote mounttab 1966 */ 1967void 1968get_mountlist() 1969{ 1970 struct mountlist *mlp, **mlpp; 1971 char *host, *dirp, *cp; 1972 int len; 1973 char str[STRSIZ]; 1974 FILE *mlfile; 1975 1976 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) { 1977 syslog(LOG_ERR, "Can't open %s", _PATH_RMOUNTLIST); 1978 return; 1979 } 1980 mlpp = &mlhead; 1981 while (fgets(str, STRSIZ, mlfile) != NULL) { 1982 cp = str; 1983 host = strsep(&cp, " \t\n"); 1984 dirp = strsep(&cp, " \t\n"); 1985 if (host == NULL || dirp == NULL) 1986 continue; 1987 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 1988 strncpy(mlp->ml_host, host, RPCMNT_NAMELEN); 1989 mlp->ml_host[RPCMNT_NAMELEN] = '\0'; 1990 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN); 1991 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0'; 1992 mlp->ml_next = (struct mountlist *)NULL; 1993 *mlpp = mlp; 1994 mlpp = &mlp->ml_next; 1995 } 1996 fclose(mlfile); 1997} 1998 1999void 2000del_mlist(hostp, dirp) 2001 char *hostp, *dirp; 2002{ 2003 struct mountlist *mlp, **mlpp; 2004 struct mountlist *mlp2; 2005 FILE *mlfile; 2006 int fnd = 0; 2007 2008 mlpp = &mlhead; 2009 mlp = mlhead; 2010 while (mlp) { 2011 if (!strcmp(mlp->ml_host, hostp) && 2012 (!dirp || !strcmp(mlp->ml_dirp, dirp))) { 2013 fnd = 1; 2014 mlp2 = mlp; 2015 *mlpp = mlp = mlp->ml_next; 2016 free((caddr_t)mlp2); 2017 } else { 2018 mlpp = &mlp->ml_next; 2019 mlp = mlp->ml_next; 2020 } 2021 } 2022 if (fnd) { 2023 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) { 2024 syslog(LOG_ERR,"Can't update %s", _PATH_RMOUNTLIST); 2025 return; 2026 } 2027 mlp = mlhead; 2028 while (mlp) { 2029 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2030 mlp = mlp->ml_next; 2031 } 2032 fclose(mlfile); 2033 } 2034} 2035 2036void 2037add_mlist(hostp, dirp) 2038 char *hostp, *dirp; 2039{ 2040 struct mountlist *mlp, **mlpp; 2041 FILE *mlfile; 2042 2043 mlpp = &mlhead; 2044 mlp = mlhead; 2045 while (mlp) { 2046 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) 2047 return; 2048 mlpp = &mlp->ml_next; 2049 mlp = mlp->ml_next; 2050 } 2051 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2052 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN); 2053 mlp->ml_host[RPCMNT_NAMELEN] = '\0'; 2054 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN); 2055 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0'; 2056 mlp->ml_next = (struct mountlist *)NULL; 2057 *mlpp = mlp; 2058 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) { 2059 syslog(LOG_ERR, "Can't update %s", _PATH_RMOUNTLIST); 2060 return; 2061 } 2062 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2063 fclose(mlfile); 2064} 2065 2066/* 2067 * This function is called via. SIGTERM when the system is going down. 2068 * It sends a broadcast RPCMNT_UMNTALL. 2069 */ 2070void 2071send_umntall() 2072{ 2073 (void) clnt_broadcast(RPCPROG_MNT, RPCMNT_VER1, RPCMNT_UMNTALL, 2074 xdr_void, (caddr_t)0, xdr_void, (caddr_t)0, umntall_each); 2075 exit(0); 2076} 2077 2078int 2079umntall_each(resultsp, raddr) 2080 caddr_t resultsp; 2081 struct sockaddr_in *raddr; 2082{ 2083 return (1); 2084} 2085 2086/* 2087 * Free up a group list. 2088 */ 2089void 2090free_grp(grp) 2091 struct grouplist *grp; 2092{ 2093 char **addrp; 2094 2095 if (grp->gr_type == GT_HOST) { 2096 if (grp->gr_ptr.gt_hostent->h_name) { 2097 addrp = grp->gr_ptr.gt_hostent->h_addr_list; 2098 while (addrp && *addrp) 2099 free(*addrp++); 2100 free((caddr_t)grp->gr_ptr.gt_hostent->h_addr_list); 2101 free(grp->gr_ptr.gt_hostent->h_name); 2102 } 2103 free((caddr_t)grp->gr_ptr.gt_hostent); 2104 } else if (grp->gr_type == GT_NET) { 2105 if (grp->gr_ptr.gt_net.nt_name) 2106 free(grp->gr_ptr.gt_net.nt_name); 2107 } 2108#ifdef ISO 2109 else if (grp->gr_type == GT_ISO) 2110 free((caddr_t)grp->gr_ptr.gt_isoaddr); 2111#endif 2112 free((caddr_t)grp); 2113} 2114 2115#ifdef DEBUG 2116void 2117SYSLOG(int pri, const char *fmt, ...) 2118{ 2119 va_list ap; 2120 2121 va_start(ap, fmt); 2122 vfprintf(stderr, fmt, ap); 2123 va_end(ap); 2124} 2125#endif /* DEBUG */ 2126 2127/* 2128 * Check options for consistency. 2129 */ 2130int 2131check_options(dp) 2132 struct dirlist *dp; 2133{ 2134 2135 if (dp == (struct dirlist *)NULL) 2136 return (1); 2137 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL) || 2138 (opt_flags & (OP_MAPROOT | OP_KERB)) == (OP_MAPROOT | OP_KERB) || 2139 (opt_flags & (OP_MAPALL | OP_KERB)) == (OP_MAPALL | OP_KERB)) { 2140 syslog(LOG_ERR, "-mapall, -maproot and -kerb mutually exclusive"); 2141 return (1); 2142 } 2143 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) { 2144 syslog(LOG_ERR, "-mask requires -net"); 2145 return (1); 2146 } 2147 if ((opt_flags & (OP_NET | OP_ISO)) == (OP_NET | OP_ISO)) { 2148 syslog(LOG_ERR, "-net and -iso mutually exclusive"); 2149 return (1); 2150 } 2151 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) { 2152 syslog(LOG_ERR, "-alldir has multiple directories"); 2153 return (1); 2154 } 2155 return (0); 2156} 2157 2158/* 2159 * Check an absolute directory path for any symbolic links. Return true 2160 * if no symbolic links are found. 2161 */ 2162int 2163check_dirpath(dirp) 2164 char *dirp; 2165{ 2166 char *cp; 2167 int ret = 1; 2168 struct stat sb; 2169 2170 cp = dirp + 1; 2171 while (*cp && ret) { 2172 if (*cp == '/') { 2173 *cp = '\0'; 2174 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 2175 ret = 0; 2176 *cp = '/'; 2177 } 2178 cp++; 2179 } 2180 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 2181 ret = 0; 2182 return (ret); 2183} 2184 2185/* 2186 * Just translate an ascii string to an integer. 2187 */ 2188int 2189get_num(cp) 2190 register char *cp; 2191{ 2192 register int res = 0; 2193 2194 while (*cp) { 2195 if (*cp < '0' || *cp > '9') 2196 return (-1); 2197 res = res * 10 + (*cp++ - '0'); 2198 } 2199 return (res); 2200} 2201