Remove some unnecessary casts.
[dragonfly.git] / sbin / mountd / mountd.c
CommitLineData
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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.
1de703da
MD
35 *
36 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)mountd.c 8.15 (Berkeley) 5/1/95
38 * $FreeBSD: src/sbin/mountd/mountd.c,v 1.39.2.5 2002/09/13 15:57:43 joerg Exp $
1aa89f17 39 * $DragonFly: src/sbin/mountd/mountd.c,v 1.9 2008/02/05 20:49:51 dillon Exp $
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40 */
41
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42#include <sys/param.h>
43#include <sys/mount.h>
1aa89f17 44#include <sys/mountctl.h>
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45#include <sys/stat.h>
46#include <sys/syslog.h>
47#include <sys/sysctl.h>
48
49#include <rpc/rpc.h>
50#include <rpc/pmap_clnt.h>
38a690d7
MD
51#include <vfs/nfs/rpcv2.h>
52#include <vfs/nfs/nfsproto.h>
53#include <vfs/nfs/nfs.h>
54#include <vfs/ufs/ufsmount.h>
55#include <vfs/msdosfs/msdosfsmount.h>
56#include <vfs/ntfs/ntfsmount.h>
57#include <vfs/isofs/cd9660/cd9660_mount.h> /* XXX need isofs in include */
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58
59#include <arpa/inet.h>
60
61#include <ctype.h>
62#include <err.h>
63#include <errno.h>
64#include <grp.h>
65#include <netdb.h>
66#include <pwd.h>
67#include <signal.h>
68#include <stdio.h>
69#include <stdlib.h>
70#include <string.h>
71#include <unistd.h>
72#include "pathnames.h"
73
74#ifdef DEBUG
75#include <stdarg.h>
76#endif
77
78/*
79 * Structures for keeping the mount list and export list
80 */
81struct mountlist {
82 struct mountlist *ml_next;
83 char ml_host[RPCMNT_NAMELEN+1];
84 char ml_dirp[RPCMNT_PATHLEN+1];
85};
86
87struct dirlist {
88 struct dirlist *dp_left;
89 struct dirlist *dp_right;
90 int dp_flag;
91 struct hostlist *dp_hosts; /* List of hosts this dir exported to */
92 char dp_dirp[1]; /* Actually malloc'd to size of dir */
93};
94/* dp_flag bits */
95#define DP_DEFSET 0x1
96#define DP_HOSTSET 0x2
97#define DP_KERB 0x4
98
99struct exportlist {
100 struct exportlist *ex_next;
101 struct dirlist *ex_dirl;
102 struct dirlist *ex_defdir;
103 int ex_flag;
104 fsid_t ex_fs;
105 char *ex_fsdir;
106 char *ex_indexfile;
107};
108/* ex_flag bits */
109#define EX_LINKED 0x1
110
111struct netmsk {
112 u_int32_t nt_net;
113 u_int32_t nt_mask;
114 char *nt_name;
115};
116
117union grouptypes {
118 struct hostent *gt_hostent;
119 struct netmsk gt_net;
120};
121
122struct grouplist {
123 int gr_type;
124 union grouptypes gr_ptr;
125 struct grouplist *gr_next;
126};
127/* Group types */
128#define GT_NULL 0x0
129#define GT_HOST 0x1
130#define GT_NET 0x2
131#define GT_IGNORE 0x5
132
133struct hostlist {
134 int ht_flag; /* Uses DP_xx bits */
135 struct grouplist *ht_grp;
136 struct hostlist *ht_next;
137};
138
139struct fhreturn {
140 int fhr_flag;
141 int fhr_vers;
142 nfsfh_t fhr_fh;
143};
144
145/* Global defs */
9a76cd75 146char *add_expdir(struct dirlist **, char *, int);
cd5332df
EN
147void add_dlist(struct dirlist **, struct dirlist *,
148 struct grouplist *, int);
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DR
149void add_mlist(char *, char *);
150int check_dirpath(char *);
151int check_options(struct dirlist *);
152int chk_host(struct dirlist *, u_int32_t, int *, int *);
153void del_mlist(char *, char *);
154struct dirlist *dirp_search(struct dirlist *, char *);
cd5332df
EN
155int do_mount(struct exportlist *, struct grouplist *, int,
156 struct ucred *, char *, int, struct statfs *);
157int do_opt(char **, char **, struct exportlist *, struct grouplist *,
158 int *, int *, struct ucred *);
9a76cd75
DR
159struct exportlist *ex_search(fsid_t *);
160struct exportlist *get_exp(void);
161void free_dir(struct dirlist *);
162void free_exp(struct exportlist *);
163void free_grp(struct grouplist *);
164void free_host(struct hostlist *);
165void get_exportlist(void);
166int get_host(char *, struct grouplist *, struct grouplist *);
167int get_num(char *);
168struct hostlist *get_ht(void);
169int get_line(void);
170void get_mountlist(void);
171int get_net(char *, struct netmsk *, int);
172void getexp_err(struct exportlist *, struct grouplist *);
173struct grouplist *get_grp(void);
cd5332df
EN
174void hang_dirp(struct dirlist *, struct grouplist *,
175 struct exportlist *, int);
9a76cd75
DR
176void mntsrv(struct svc_req *, SVCXPRT *);
177void nextfield(char **, char **);
178void out_of_mem(void);
179void parsecred(char *, struct ucred *);
180int put_exlist(struct dirlist *, XDR *, struct dirlist *, int *);
181int scan_tree(struct dirlist *, u_int32_t);
182static void usage(void);
183int xdr_dir(XDR *, char *);
184int xdr_explist(XDR *, caddr_t);
185int xdr_fhs(XDR *, caddr_t);
186int xdr_mlist(XDR *, caddr_t);
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187
188struct exportlist *exphead;
189struct mountlist *mlhead;
190struct grouplist *grphead;
191char exname[MAXPATHLEN];
192struct ucred def_anon = {
193 1,
194 (uid_t) -2,
195 1,
196 { (gid_t) -2 }
197};
198int force_v2 = 0;
199int resvport_only = 1;
200int dir_only = 1;
8af0d623 201int do_log = 0;
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202int opt_flags;
203/* Bits for above */
204#define OP_MAPROOT 0x01
205#define OP_MAPALL 0x02
206#define OP_KERB 0x04
207#define OP_MASK 0x08
208#define OP_NET 0x10
209#define OP_ALLDIRS 0x40
210/* 0x80 is OP_HAVEMASK in FreeBSD 5+ */
211#define OP_QUIET 0x100
212
213#ifdef DEBUG
214int debug = 1;
9a76cd75 215void SYSLOG(int, const char *, ...);
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216#define syslog SYSLOG
217#else
218int debug = 0;
219#endif
220
221/*
222 * Mountd server for NFS mount protocol as described in:
223 * NFS: Network File System Protocol Specification, RFC1094, Appendix A
224 * The optional arguments are the exports file name
225 * default: _PATH_EXPORTS
226 * and "-n" to allow nonroot mount.
227 */
228int
b5744197 229main(int argc, char **argv)
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230{
231 SVCXPRT *udptransp, *tcptransp;
232 int c, error, mib[3];
233 struct vfsconf vfc;
234
235 error = getvfsbyname("nfs", &vfc);
236 if (error && vfsisloadable("nfs")) {
237 if(vfsload("nfs"))
238 err(1, "vfsload(nfs)");
239 endvfsent(); /* flush cache */
240 error = getvfsbyname("nfs", &vfc);
241 }
242 if (error)
243 errx(1, "NFS support is not available in the running kernel");
244
245 while ((c = getopt(argc, argv, "2dlnr")) != -1)
246 switch (c) {
247 case '2':
248 force_v2 = 1;
249 break;
250 case 'n':
251 resvport_only = 0;
252 break;
253 case 'r':
254 dir_only = 0;
255 break;
256 case 'd':
257 debug = debug ? 0 : 1;
258 break;
259 case 'l':
8af0d623 260 do_log = 1;
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MD
261 break;
262 default:
263 usage();
264 };
265 argc -= optind;
266 argv += optind;
267 grphead = (struct grouplist *)NULL;
268 exphead = (struct exportlist *)NULL;
269 mlhead = (struct mountlist *)NULL;
270 if (argc == 1) {
271 strncpy(exname, *argv, MAXPATHLEN-1);
272 exname[MAXPATHLEN-1] = '\0';
273 } else
274 strcpy(exname, _PATH_EXPORTS);
275 openlog("mountd", LOG_PID, LOG_DAEMON);
276 if (debug)
277 warnx("getting export list");
278 get_exportlist();
279 if (debug)
280 warnx("getting mount list");
281 get_mountlist();
282 if (debug)
283 warnx("here we go");
284 if (debug == 0) {
285 daemon(0, 0);
286 signal(SIGINT, SIG_IGN);
287 signal(SIGQUIT, SIG_IGN);
288 }
9a76cd75 289 signal(SIGHUP, (void (*)(int)) get_exportlist);
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290 { FILE *pidfile = fopen(_PATH_MOUNTDPID, "w");
291 if (pidfile != NULL) {
292 fprintf(pidfile, "%d\n", getpid());
293 fclose(pidfile);
294 }
295 }
296 if (!resvport_only) {
297 mib[0] = CTL_VFS;
298 mib[1] = vfc.vfc_typenum;
299 mib[2] = NFS_NFSPRIVPORT;
300 if (sysctl(mib, 3, NULL, NULL, &resvport_only,
301 sizeof(resvport_only)) != 0 && errno != ENOENT) {
302 syslog(LOG_ERR, "sysctl: %m");
303 exit(1);
304 }
305 }
306 if ((udptransp = svcudp_create(RPC_ANYSOCK)) == NULL ||
307 (tcptransp = svctcp_create(RPC_ANYSOCK, 0, 0)) == NULL) {
308 syslog(LOG_ERR, "can't create socket");
309 exit(1);
310 }
311 pmap_unset(RPCPROG_MNT, 1);
312 pmap_unset(RPCPROG_MNT, 3);
313 if (!force_v2)
314 if (!svc_register(udptransp, RPCPROG_MNT, 3, mntsrv, IPPROTO_UDP) ||
315 !svc_register(tcptransp, RPCPROG_MNT, 3, mntsrv, IPPROTO_TCP)) {
316 syslog(LOG_ERR, "can't register mount");
317 exit(1);
318 }
319 if (!svc_register(udptransp, RPCPROG_MNT, 1, mntsrv, IPPROTO_UDP) ||
320 !svc_register(tcptransp, RPCPROG_MNT, 1, mntsrv, IPPROTO_TCP)) {
321 syslog(LOG_ERR, "can't register mount");
322 exit(1);
323 }
324 svc_run();
325 syslog(LOG_ERR, "mountd died");
326 exit(1);
327}
328
329static void
b5744197 330usage(void)
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MD
331{
332 fprintf(stderr,
333 "usage: mountd [-2] [-d] [-l] [-n] [-r] [export_file]\n");
334 exit(1);
335}
336
337/*
338 * The mount rpc service
339 */
340void
b5744197 341mntsrv(struct svc_req *rqstp, SVCXPRT *transp)
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MD
342{
343 struct exportlist *ep;
344 struct dirlist *dp;
345 struct fhreturn fhr;
346 struct stat stb;
347 struct statfs fsb;
348 struct hostent *hp;
349 struct in_addr saddrin;
350 u_int32_t saddr;
351 u_short sport;
352 char rpcpath[RPCMNT_PATHLEN + 1], dirpath[MAXPATHLEN];
353 int bad = 0, defset, hostset;
354 sigset_t sighup_mask;
355
356 sigemptyset(&sighup_mask);
357 sigaddset(&sighup_mask, SIGHUP);
358 saddr = transp->xp_raddr.sin_addr.s_addr;
359 saddrin = transp->xp_raddr.sin_addr;
360 sport = ntohs(transp->xp_raddr.sin_port);
361 hp = (struct hostent *)NULL;
362 switch (rqstp->rq_proc) {
363 case NULLPROC:
364 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL))
365 syslog(LOG_ERR, "can't send reply");
366 return;
367 case RPCMNT_MOUNT:
368 if (sport >= IPPORT_RESERVED && resvport_only) {
369 syslog(LOG_NOTICE,
370 "mount request from %s from unprivileged port",
371 inet_ntoa(saddrin));
372 svcerr_weakauth(transp);
373 return;
374 }
375 if (!svc_getargs(transp, xdr_dir, rpcpath)) {
376 syslog(LOG_NOTICE, "undecodable mount request from %s",
377 inet_ntoa(saddrin));
378 svcerr_decode(transp);
379 return;
380 }
381
382 /*
383 * Get the real pathname and make sure it is a directory
384 * or a regular file if the -r option was specified
385 * and it exists.
386 */
387 if (realpath(rpcpath, dirpath) == NULL ||
388 stat(dirpath, &stb) < 0 ||
389 (!S_ISDIR(stb.st_mode) &&
390 (dir_only || !S_ISREG(stb.st_mode))) ||
391 statfs(dirpath, &fsb) < 0) {
392 chdir("/"); /* Just in case realpath doesn't */
393 syslog(LOG_NOTICE,
394 "mount request from %s for non existent path %s",
395 inet_ntoa(saddrin), dirpath);
396 if (debug)
397 warnx("stat failed on %s", dirpath);
398 bad = ENOENT; /* We will send error reply later */
399 }
400
401 /* Check in the exports list */
402 sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
403 ep = ex_search(&fsb.f_fsid);
404 hostset = defset = 0;
405 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset) ||
406 ((dp = dirp_search(ep->ex_dirl, dirpath)) &&
407 chk_host(dp, saddr, &defset, &hostset)) ||
408 (defset && scan_tree(ep->ex_defdir, saddr) == 0 &&
409 scan_tree(ep->ex_dirl, saddr) == 0))) {
410 if (bad) {
411 if (!svc_sendreply(transp, xdr_long,
412 (caddr_t)&bad))
413 syslog(LOG_ERR, "can't send reply");
414 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
415 return;
416 }
417 if (hostset & DP_HOSTSET)
418 fhr.fhr_flag = hostset;
419 else
420 fhr.fhr_flag = defset;
421 fhr.fhr_vers = rqstp->rq_vers;
422 /* Get the file handle */
423 memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t));
424 if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) {
425 bad = errno;
426 syslog(LOG_ERR, "can't get fh for %s", dirpath);
427 if (!svc_sendreply(transp, xdr_long,
428 (caddr_t)&bad))
429 syslog(LOG_ERR, "can't send reply");
430 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
431 return;
432 }
433 if (!svc_sendreply(transp, xdr_fhs, (caddr_t)&fhr))
434 syslog(LOG_ERR, "can't send reply");
435 if (hp == NULL)
15b85273
SW
436 hp = gethostbyaddr(&saddr, sizeof(saddr),
437 AF_INET);
984263bc
MD
438 if (hp)
439 add_mlist(hp->h_name, dirpath);
440 else
441 add_mlist(inet_ntoa(saddrin),
442 dirpath);
443 if (debug)
444 warnx("mount successful");
8af0d623 445 if (do_log)
984263bc
MD
446 syslog(LOG_NOTICE,
447 "mount request succeeded from %s for %s",
448 inet_ntoa(saddrin), dirpath);
449 } else {
450 bad = EACCES;
451 syslog(LOG_NOTICE,
452 "mount request denied from %s for %s",
453 inet_ntoa(saddrin), dirpath);
454 }
455
456 if (bad && !svc_sendreply(transp, xdr_long, (caddr_t)&bad))
457 syslog(LOG_ERR, "can't send reply");
458 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
459 return;
460 case RPCMNT_DUMP:
461 if (!svc_sendreply(transp, xdr_mlist, (caddr_t)NULL))
462 syslog(LOG_ERR, "can't send reply");
8af0d623 463 else if (do_log)
984263bc
MD
464 syslog(LOG_NOTICE,
465 "dump request succeeded from %s",
466 inet_ntoa(saddrin));
467 return;
468 case RPCMNT_UMOUNT:
469 if (sport >= IPPORT_RESERVED && resvport_only) {
470 syslog(LOG_NOTICE,
471 "umount request from %s from unprivileged port",
472 inet_ntoa(saddrin));
473 svcerr_weakauth(transp);
474 return;
475 }
476 if (!svc_getargs(transp, xdr_dir, rpcpath)) {
477 syslog(LOG_NOTICE, "undecodable umount request from %s",
478 inet_ntoa(saddrin));
479 svcerr_decode(transp);
480 return;
481 }
482 if (realpath(rpcpath, dirpath) == NULL) {
483 syslog(LOG_NOTICE, "umount request from %s "
484 "for non existent path %s",
485 inet_ntoa(saddrin), dirpath);
486 }
487 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL))
488 syslog(LOG_ERR, "can't send reply");
15b85273 489 hp = gethostbyaddr(&saddr, sizeof(saddr), AF_INET);
984263bc
MD
490 if (hp)
491 del_mlist(hp->h_name, dirpath);
492 del_mlist(inet_ntoa(saddrin), dirpath);
8af0d623 493 if (do_log)
984263bc
MD
494 syslog(LOG_NOTICE,
495 "umount request succeeded from %s for %s",
496 inet_ntoa(saddrin), dirpath);
497 return;
498 case RPCMNT_UMNTALL:
499 if (sport >= IPPORT_RESERVED && resvport_only) {
500 syslog(LOG_NOTICE,
501 "umountall request from %s from unprivileged port",
502 inet_ntoa(saddrin));
503 svcerr_weakauth(transp);
504 return;
505 }
506 if (!svc_sendreply(transp, xdr_void, (caddr_t)NULL))
507 syslog(LOG_ERR, "can't send reply");
15b85273 508 hp = gethostbyaddr(&saddr, sizeof(saddr), AF_INET);
984263bc
MD
509 if (hp)
510 del_mlist(hp->h_name, (char *)NULL);
511 del_mlist(inet_ntoa(saddrin), (char *)NULL);
8af0d623 512 if (do_log)
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MD
513 syslog(LOG_NOTICE,
514 "umountall request succeeded from %s",
515 inet_ntoa(saddrin));
516 return;
517 case RPCMNT_EXPORT:
518 if (!svc_sendreply(transp, xdr_explist, (caddr_t)NULL))
519 syslog(LOG_ERR, "can't send reply");
8af0d623 520 if (do_log)
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MD
521 syslog(LOG_NOTICE,
522 "export request succeeded from %s",
523 inet_ntoa(saddrin));
524 return;
525 default:
526 svcerr_noproc(transp);
527 return;
528 }
529}
530
531/*
532 * Xdr conversion for a dirpath string
533 */
534int
b5744197 535xdr_dir(XDR *xdrsp, char *dirp)
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MD
536{
537 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
538}
539
540/*
541 * Xdr routine to generate file handle reply
542 */
543int
b5744197 544xdr_fhs(XDR *xdrsp, caddr_t cp)
984263bc 545{
af62a082 546 struct fhreturn *fhrp = (struct fhreturn *)cp;
984263bc
MD
547 u_long ok = 0, len, auth;
548
549 if (!xdr_long(xdrsp, &ok))
550 return (0);
551 switch (fhrp->fhr_vers) {
552 case 1:
553 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH));
554 case 3:
555 len = NFSX_V3FH;
556 if (!xdr_long(xdrsp, &len))
557 return (0);
558 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len))
559 return (0);
560 if (fhrp->fhr_flag & DP_KERB)
561 auth = RPCAUTH_KERB4;
562 else
563 auth = RPCAUTH_UNIX;
564 len = 1;
565 if (!xdr_long(xdrsp, &len))
566 return (0);
567 return (xdr_long(xdrsp, &auth));
568 };
569 return (0);
570}
571
572int
b5744197 573xdr_mlist(XDR *xdrsp, caddr_t cp)
984263bc
MD
574{
575 struct mountlist *mlp;
576 int true = 1;
577 int false = 0;
578 char *strp;
579
580 mlp = mlhead;
581 while (mlp) {
582 if (!xdr_bool(xdrsp, &true))
583 return (0);
584 strp = &mlp->ml_host[0];
585 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
586 return (0);
587 strp = &mlp->ml_dirp[0];
588 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
589 return (0);
590 mlp = mlp->ml_next;
591 }
592 if (!xdr_bool(xdrsp, &false))
593 return (0);
594 return (1);
595}
596
597/*
598 * Xdr conversion for export list
599 */
600int
b5744197 601xdr_explist(XDR *xdrsp, caddr_t cp)
984263bc
MD
602{
603 struct exportlist *ep;
604 int false = 0;
605 int putdef;
606 sigset_t sighup_mask;
607
608 sigemptyset(&sighup_mask);
609 sigaddset(&sighup_mask, SIGHUP);
610 sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
611 ep = exphead;
612 while (ep) {
613 putdef = 0;
614 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, &putdef))
615 goto errout;
616 if (ep->ex_defdir && putdef == 0 &&
617 put_exlist(ep->ex_defdir, xdrsp, (struct dirlist *)NULL,
618 &putdef))
619 goto errout;
620 ep = ep->ex_next;
621 }
622 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
623 if (!xdr_bool(xdrsp, &false))
624 return (0);
625 return (1);
626errout:
627 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
628 return (0);
629}
630
631/*
632 * Called from xdr_explist() to traverse the tree and export the
633 * directory paths.
634 */
635int
b5744197 636put_exlist(struct dirlist *dp, XDR *xdrsp, struct dirlist *adp, int *putdefp)
984263bc
MD
637{
638 struct grouplist *grp;
639 struct hostlist *hp;
640 int true = 1;
641 int false = 0;
642 int gotalldir = 0;
643 char *strp;
644
645 if (dp) {
646 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp))
647 return (1);
648 if (!xdr_bool(xdrsp, &true))
649 return (1);
650 strp = dp->dp_dirp;
651 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
652 return (1);
653 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) {
654 gotalldir = 1;
655 *putdefp = 1;
656 }
657 if ((dp->dp_flag & DP_DEFSET) == 0 &&
658 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) {
659 hp = dp->dp_hosts;
660 while (hp) {
661 grp = hp->ht_grp;
662 if (grp->gr_type == GT_HOST) {
663 if (!xdr_bool(xdrsp, &true))
664 return (1);
665 strp = grp->gr_ptr.gt_hostent->h_name;
666 if (!xdr_string(xdrsp, &strp,
667 RPCMNT_NAMELEN))
668 return (1);
669 } else if (grp->gr_type == GT_NET) {
670 if (!xdr_bool(xdrsp, &true))
671 return (1);
672 strp = grp->gr_ptr.gt_net.nt_name;
673 if (!xdr_string(xdrsp, &strp,
674 RPCMNT_NAMELEN))
675 return (1);
676 }
677 hp = hp->ht_next;
678 if (gotalldir && hp == (struct hostlist *)NULL) {
679 hp = adp->dp_hosts;
680 gotalldir = 0;
681 }
682 }
683 }
684 if (!xdr_bool(xdrsp, &false))
685 return (1);
686 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp))
687 return (1);
688 }
689 return (0);
690}
691
692#define LINESIZ 10240
693char line[LINESIZ];
694FILE *exp_file;
695
696/*
697 * Get the export list
698 */
699void
b5744197 700get_exportlist(void)
984263bc
MD
701{
702 struct exportlist *ep, *ep2;
703 struct grouplist *grp, *tgrp;
704 struct exportlist **epp;
705 struct dirlist *dirhead;
706 struct statfs fsb, *fsp;
707 struct hostent *hpe;
708 struct ucred anon;
709 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc;
710 int len, has_host, exflags, got_nondir, dirplen, num, i, netgrp;
711
712 dirp = NULL;
713 dirplen = 0;
714
715 /*
716 * First, get rid of the old list
717 */
718 ep = exphead;
719 while (ep) {
720 ep2 = ep;
721 ep = ep->ex_next;
722 free_exp(ep2);
723 }
724 exphead = (struct exportlist *)NULL;
725
726 grp = grphead;
727 while (grp) {
728 tgrp = grp;
729 grp = grp->gr_next;
730 free_grp(tgrp);
731 }
732 grphead = (struct grouplist *)NULL;
733
734 /*
735 * And delete exports that are in the kernel for all local
736 * file systems.
737 * XXX: Should know how to handle all local exportable file systems
738 * instead of just "ufs".
739 */
740 num = getmntinfo(&fsp, MNT_NOWAIT);
741 for (i = 0; i < num; i++) {
742 union {
743 struct ufs_args ua;
744 struct iso_args ia;
745 struct mfs_args ma;
746 struct msdosfs_args da;
747 struct ntfs_args na;
748 } targs;
1aa89f17 749 struct export_args export;
984263bc 750
1aa89f17
MD
751 export.ex_flags = MNT_DELEXPORT;
752 if (mountctl(fsp->f_mntonname, MOUNTCTL_SET_EXPORT, -1,
753 &export, sizeof(export), NULL, 0) == 0) {
754 } else if (!strcmp(fsp->f_fstypename, "mfs") ||
984263bc
MD
755 !strcmp(fsp->f_fstypename, "ufs") ||
756 !strcmp(fsp->f_fstypename, "msdos") ||
757 !strcmp(fsp->f_fstypename, "ntfs") ||
758 !strcmp(fsp->f_fstypename, "cd9660")) {
759 targs.ua.fspec = NULL;
760 targs.ua.export.ex_flags = MNT_DELEXPORT;
761 if (mount(fsp->f_fstypename, fsp->f_mntonname,
762 fsp->f_flags | MNT_UPDATE,
763 (caddr_t)&targs) < 0)
764 syslog(LOG_ERR, "can't delete exports for %s",
765 fsp->f_mntonname);
766 }
767 fsp++;
768 }
769
770 /*
771 * Read in the exports file and build the list, calling
772 * mount() as we go along to push the export rules into the kernel.
773 */
774 if ((exp_file = fopen(exname, "r")) == NULL) {
775 syslog(LOG_ERR, "can't open %s", exname);
776 exit(2);
777 }
778 dirhead = (struct dirlist *)NULL;
779 while (get_line()) {
780 if (debug)
781 warnx("got line %s", line);
782 cp = line;
783 nextfield(&cp, &endcp);
784 if (*cp == '#')
785 goto nextline;
786
787 /*
788 * Set defaults.
789 */
790 has_host = FALSE;
791 anon = def_anon;
792 exflags = MNT_EXPORTED;
793 got_nondir = 0;
794 opt_flags = 0;
795 ep = (struct exportlist *)NULL;
796
797 /*
798 * Create new exports list entry
799 */
800 len = endcp-cp;
801 tgrp = grp = get_grp();
802 while (len > 0) {
803 if (len > RPCMNT_NAMELEN) {
804 getexp_err(ep, tgrp);
805 goto nextline;
806 }
807 if (*cp == '-') {
808 if (ep == (struct exportlist *)NULL) {
809 getexp_err(ep, tgrp);
810 goto nextline;
811 }
812 if (debug)
813 warnx("doing opt %s", cp);
814 got_nondir = 1;
815 if (do_opt(&cp, &endcp, ep, grp, &has_host,
816 &exflags, &anon)) {
817 getexp_err(ep, tgrp);
818 goto nextline;
819 }
820 } else if (*cp == '/') {
821 savedc = *endcp;
822 *endcp = '\0';
823 if (check_dirpath(cp) &&
824 statfs(cp, &fsb) >= 0) {
825 if (got_nondir) {
826 syslog(LOG_ERR, "dirs must be first");
827 getexp_err(ep, tgrp);
828 goto nextline;
829 }
830 if (ep) {
831 if (ep->ex_fs.val[0] != fsb.f_fsid.val[0] ||
832 ep->ex_fs.val[1] != fsb.f_fsid.val[1]) {
833 getexp_err(ep, tgrp);
834 goto nextline;
835 }
836 } else {
837 /*
838 * See if this directory is already
839 * in the list.
840 */
841 ep = ex_search(&fsb.f_fsid);
842 if (ep == (struct exportlist *)NULL) {
843 ep = get_exp();
844 ep->ex_fs = fsb.f_fsid;
845 ep->ex_fsdir = (char *)
846 malloc(strlen(fsb.f_mntonname) + 1);
847 if (ep->ex_fsdir)
848 strcpy(ep->ex_fsdir,
849 fsb.f_mntonname);
850 else
851 out_of_mem();
852 if (debug)
853 warnx("making new ep fs=0x%x,0x%x",
854 fsb.f_fsid.val[0],
855 fsb.f_fsid.val[1]);
856 } else if (debug)
857 warnx("found ep fs=0x%x,0x%x",
858 fsb.f_fsid.val[0],
859 fsb.f_fsid.val[1]);
860 }
861
862 /*
863 * Add dirpath to export mount point.
864 */
865 dirp = add_expdir(&dirhead, cp, len);
866 dirplen = len;
867 } else {
868 getexp_err(ep, tgrp);
869 goto nextline;
870 }
871 *endcp = savedc;
872 } else {
873 savedc = *endcp;
874 *endcp = '\0';
875 got_nondir = 1;
876 if (ep == (struct exportlist *)NULL) {
877 getexp_err(ep, tgrp);
878 goto nextline;
879 }
880
881 /*
882 * Get the host or netgroup.
883 */
884 setnetgrent(cp);
885 netgrp = getnetgrent(&hst, &usr, &dom);
886 do {
887 if (has_host) {
888 grp->gr_next = get_grp();
889 grp = grp->gr_next;
890 }
891 if (netgrp) {
892 if (hst == 0) {
893 syslog(LOG_ERR,
894 "null hostname in netgroup %s, skipping", cp);
895 grp->gr_type = GT_IGNORE;
896 } else if (get_host(hst, grp, tgrp)) {
897 syslog(LOG_ERR,
898 "bad host %s in netgroup %s, skipping", hst, cp);
899 grp->gr_type = GT_IGNORE;
900 }
901 } else if (get_host(cp, grp, tgrp)) {
902 syslog(LOG_ERR, "bad host %s, skipping", cp);
903 grp->gr_type = GT_IGNORE;
904 }
905 has_host = TRUE;
906 } while (netgrp && getnetgrent(&hst, &usr, &dom));
907 endnetgrent();
908 *endcp = savedc;
909 }
910 cp = endcp;
911 nextfield(&cp, &endcp);
912 len = endcp - cp;
913 }
914 if (check_options(dirhead)) {
915 getexp_err(ep, tgrp);
916 goto nextline;
917 }
918 if (!has_host) {
919 grp->gr_type = GT_HOST;
920 if (debug)
921 warnx("adding a default entry");
922 /* add a default group and make the grp list NULL */
923 hpe = (struct hostent *)malloc(sizeof(struct hostent));
924 if (hpe == (struct hostent *)NULL)
925 out_of_mem();
926 hpe->h_name = strdup("Default");
927 hpe->h_addrtype = AF_INET;
928 hpe->h_length = sizeof (u_int32_t);
929 hpe->h_addr_list = (char **)NULL;
930 grp->gr_ptr.gt_hostent = hpe;
931
932 /*
933 * Don't allow a network export coincide with a list of
934 * host(s) on the same line.
935 */
936 } else if ((opt_flags & OP_NET) && tgrp->gr_next) {
937 getexp_err(ep, tgrp);
938 goto nextline;
939
940 /*
941 * If an export list was specified on this line, make sure
942 * that we have at least one valid entry, otherwise skip it.
943 */
944 } else {
945 grp = tgrp;
946 while (grp && grp->gr_type == GT_IGNORE)
947 grp = grp->gr_next;
948 if (! grp) {
949 getexp_err(ep, tgrp);
950 goto nextline;
951 }
952 }
953
954 /*
955 * Loop through hosts, pushing the exports into the kernel.
956 * After loop, tgrp points to the start of the list and
957 * grp points to the last entry in the list.
958 */
959 grp = tgrp;
960 do {
961 if (do_mount(ep, grp, exflags, &anon, dirp,
962 dirplen, &fsb)) {
963 getexp_err(ep, tgrp);
964 goto nextline;
965 }
966 } while (grp->gr_next && (grp = grp->gr_next));
967
968 /*
969 * Success. Update the data structures.
970 */
971 if (has_host) {
972 hang_dirp(dirhead, tgrp, ep, opt_flags);
973 grp->gr_next = grphead;
974 grphead = tgrp;
975 } else {
976 hang_dirp(dirhead, (struct grouplist *)NULL, ep,
977 opt_flags);
978 free_grp(grp);
979 }
980 dirhead = (struct dirlist *)NULL;
981 if ((ep->ex_flag & EX_LINKED) == 0) {
982 ep2 = exphead;
983 epp = &exphead;
984
985 /*
986 * Insert in the list in alphabetical order.
987 */
988 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) {
989 epp = &ep2->ex_next;
990 ep2 = ep2->ex_next;
991 }
992 if (ep2)
993 ep->ex_next = ep2;
994 *epp = ep;
995 ep->ex_flag |= EX_LINKED;
996 }
997nextline:
998 if (dirhead) {
999 free_dir(dirhead);
1000 dirhead = (struct dirlist *)NULL;
1001 }
1002 }
1003 fclose(exp_file);
1004}
1005
1006/*
1007 * Allocate an export list element
1008 */
1009struct exportlist *
b5744197 1010get_exp(void)
984263bc
MD
1011{
1012 struct exportlist *ep;
1013
1014 ep = (struct exportlist *)malloc(sizeof (struct exportlist));
1015 if (ep == (struct exportlist *)NULL)
1016 out_of_mem();
1017 memset(ep, 0, sizeof(struct exportlist));
1018 return (ep);
1019}
1020
1021/*
1022 * Allocate a group list element
1023 */
1024struct grouplist *
b5744197 1025get_grp(void)
984263bc
MD
1026{
1027 struct grouplist *gp;
1028
1029 gp = (struct grouplist *)malloc(sizeof (struct grouplist));
1030 if (gp == (struct grouplist *)NULL)
1031 out_of_mem();
1032 memset(gp, 0, sizeof(struct grouplist));
1033 return (gp);
1034}
1035
1036/*
1037 * Clean up upon an error in get_exportlist().
1038 */
1039void
b5744197 1040getexp_err(struct exportlist *ep, struct grouplist *grp)
984263bc
MD
1041{
1042 struct grouplist *tgrp;
1043
1044 if (!(opt_flags & OP_QUIET))
1045 syslog(LOG_ERR, "bad exports list line %s", line);
1046 if (ep && (ep->ex_flag & EX_LINKED) == 0)
1047 free_exp(ep);
1048 while (grp) {
1049 tgrp = grp;
1050 grp = grp->gr_next;
1051 free_grp(tgrp);
1052 }
1053}
1054
1055/*
1056 * Search the export list for a matching fs.
1057 */
1058struct exportlist *
b5744197 1059ex_search(fsid_t *fsid)
984263bc
MD
1060{
1061 struct exportlist *ep;
1062
1063 ep = exphead;
1064 while (ep) {
1065 if (ep->ex_fs.val[0] == fsid->val[0] &&
1066 ep->ex_fs.val[1] == fsid->val[1])
1067 return (ep);
1068 ep = ep->ex_next;
1069 }
1070 return (ep);
1071}
1072
1073/*
1074 * Add a directory path to the list.
1075 */
1076char *
b5744197 1077add_expdir(struct dirlist **dpp, char *cp, int len)
984263bc
MD
1078{
1079 struct dirlist *dp;
1080
1081 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len);
1082 if (dp == (struct dirlist *)NULL)
1083 out_of_mem();
1084 dp->dp_left = *dpp;
1085 dp->dp_right = (struct dirlist *)NULL;
1086 dp->dp_flag = 0;
1087 dp->dp_hosts = (struct hostlist *)NULL;
1088 strcpy(dp->dp_dirp, cp);
1089 *dpp = dp;
1090 return (dp->dp_dirp);
1091}
1092
1093/*
1094 * Hang the dir list element off the dirpath binary tree as required
1095 * and update the entry for host.
1096 */
1097void
b5744197
HP
1098hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep,
1099 int flags)
984263bc
MD
1100{
1101 struct hostlist *hp;
1102 struct dirlist *dp2;
1103
1104 if (flags & OP_ALLDIRS) {
1105 if (ep->ex_defdir)
1106 free((caddr_t)dp);
1107 else
1108 ep->ex_defdir = dp;
1109 if (grp == (struct grouplist *)NULL) {
1110 ep->ex_defdir->dp_flag |= DP_DEFSET;
1111 if (flags & OP_KERB)
1112 ep->ex_defdir->dp_flag |= DP_KERB;
1113 } else while (grp) {
1114 hp = get_ht();
1115 if (flags & OP_KERB)
1116 hp->ht_flag |= DP_KERB;
1117 hp->ht_grp = grp;
1118 hp->ht_next = ep->ex_defdir->dp_hosts;
1119 ep->ex_defdir->dp_hosts = hp;
1120 grp = grp->gr_next;
1121 }
1122 } else {
1123
1124 /*
1125 * Loop through the directories adding them to the tree.
1126 */
1127 while (dp) {
1128 dp2 = dp->dp_left;
1129 add_dlist(&ep->ex_dirl, dp, grp, flags);
1130 dp = dp2;
1131 }
1132 }
1133}
1134
1135/*
1136 * Traverse the binary tree either updating a node that is already there
1137 * for the new directory or adding the new node.
1138 */
1139void
b5744197
HP
1140add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp,
1141 int flags)
984263bc
MD
1142{
1143 struct dirlist *dp;
1144 struct hostlist *hp;
1145 int cmp;
1146
1147 dp = *dpp;
1148 if (dp) {
1149 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp);
1150 if (cmp > 0) {
1151 add_dlist(&dp->dp_left, newdp, grp, flags);
1152 return;
1153 } else if (cmp < 0) {
1154 add_dlist(&dp->dp_right, newdp, grp, flags);
1155 return;
1156 } else
1157 free((caddr_t)newdp);
1158 } else {
1159 dp = newdp;
1160 dp->dp_left = (struct dirlist *)NULL;
1161 *dpp = dp;
1162 }
1163 if (grp) {
1164
1165 /*
1166 * Hang all of the host(s) off of the directory point.
1167 */
1168 do {
1169 hp = get_ht();
1170 if (flags & OP_KERB)
1171 hp->ht_flag |= DP_KERB;
1172 hp->ht_grp = grp;
1173 hp->ht_next = dp->dp_hosts;
1174 dp->dp_hosts = hp;
1175 grp = grp->gr_next;
1176 } while (grp);
1177 } else {
1178 dp->dp_flag |= DP_DEFSET;
1179 if (flags & OP_KERB)
1180 dp->dp_flag |= DP_KERB;
1181 }
1182}
1183
1184/*
1185 * Search for a dirpath on the export point.
1186 */
1187struct dirlist *
b5744197 1188dirp_search(struct dirlist *dp, char *dirpath)
984263bc
MD
1189{
1190 int cmp;
1191
1192 if (dp) {
1193 cmp = strcmp(dp->dp_dirp, dirpath);
1194 if (cmp > 0)
1195 return (dirp_search(dp->dp_left, dirpath));
1196 else if (cmp < 0)
1197 return (dirp_search(dp->dp_right, dirpath));
1198 else
1199 return (dp);
1200 }
1201 return (dp);
1202}
1203
1204/*
1205 * Scan for a host match in a directory tree.
1206 */
1207int
b5744197 1208chk_host(struct dirlist *dp, u_int32_t saddr, int *defsetp, int *hostsetp)
984263bc
MD
1209{
1210 struct hostlist *hp;
1211 struct grouplist *grp;
1212 u_int32_t **addrp;
1213
1214 if (dp) {
1215 if (dp->dp_flag & DP_DEFSET)
1216 *defsetp = dp->dp_flag;
1217 hp = dp->dp_hosts;
1218 while (hp) {
1219 grp = hp->ht_grp;
1220 switch (grp->gr_type) {
1221 case GT_HOST:
1222 addrp = (u_int32_t **)
1223 grp->gr_ptr.gt_hostent->h_addr_list;
1224 while (*addrp) {
1225 if (**addrp == saddr) {
1226 *hostsetp = (hp->ht_flag | DP_HOSTSET);
1227 return (1);
1228 }
1229 addrp++;
1230 }
1231 break;
1232 case GT_NET:
1233 if ((saddr & grp->gr_ptr.gt_net.nt_mask) ==
1234 grp->gr_ptr.gt_net.nt_net) {
1235 *hostsetp = (hp->ht_flag | DP_HOSTSET);
1236 return (1);
1237 }
1238 break;
1239 };
1240 hp = hp->ht_next;
1241 }
1242 }
1243 return (0);
1244}
1245
1246/*
1247 * Scan tree for a host that matches the address.
1248 */
1249int
b5744197 1250scan_tree(struct dirlist *dp, u_int32_t saddr)
984263bc
MD
1251{
1252 int defset, hostset;
1253
1254 if (dp) {
1255 if (scan_tree(dp->dp_left, saddr))
1256 return (1);
1257 if (chk_host(dp, saddr, &defset, &hostset))
1258 return (1);
1259 if (scan_tree(dp->dp_right, saddr))
1260 return (1);
1261 }
1262 return (0);
1263}
1264
1265/*
1266 * Traverse the dirlist tree and free it up.
1267 */
1268void
b5744197 1269free_dir(struct dirlist *dp)
984263bc
MD
1270{
1271
1272 if (dp) {
1273 free_dir(dp->dp_left);
1274 free_dir(dp->dp_right);
1275 free_host(dp->dp_hosts);
1276 free((caddr_t)dp);
1277 }
1278}
1279
1280/*
1281 * Parse the option string and update fields.
1282 * Option arguments may either be -<option>=<value> or
1283 * -<option> <value>
1284 */
1285int
b5744197
HP
1286do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp,
1287 int *has_hostp, int *exflagsp, struct ucred *cr)
984263bc
MD
1288{
1289 char *cpoptarg, *cpoptend;
1290 char *cp, *endcp, *cpopt, savedc, savedc2;
1291 int allflag, usedarg;
1292
1293 savedc2 = '\0';
1294 cpopt = *cpp;
1295 cpopt++;
1296 cp = *endcpp;
1297 savedc = *cp;
1298 *cp = '\0';
1299 while (cpopt && *cpopt) {
1300 allflag = 1;
1301 usedarg = -2;
1302 if ((cpoptend = strchr(cpopt, ','))) {
1303 *cpoptend++ = '\0';
1304 if ((cpoptarg = strchr(cpopt, '=')))
1305 *cpoptarg++ = '\0';
1306 } else {
1307 if ((cpoptarg = strchr(cpopt, '=')))
1308 *cpoptarg++ = '\0';
1309 else {
1310 *cp = savedc;
1311 nextfield(&cp, &endcp);
1312 **endcpp = '\0';
1313 if (endcp > cp && *cp != '-') {
1314 cpoptarg = cp;
1315 savedc2 = *endcp;
1316 *endcp = '\0';
1317 usedarg = 0;
1318 }
1319 }
1320 }
1321 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) {
1322 *exflagsp |= MNT_EXRDONLY;
1323 } else if (cpoptarg && (!strcmp(cpopt, "maproot") ||
1324 !(allflag = strcmp(cpopt, "mapall")) ||
1325 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) {
1326 usedarg++;
1327 parsecred(cpoptarg, cr);
1328 if (allflag == 0) {
1329 *exflagsp |= MNT_EXPORTANON;
1330 opt_flags |= OP_MAPALL;
1331 } else
1332 opt_flags |= OP_MAPROOT;
1333 } else if (!strcmp(cpopt, "kerb") || !strcmp(cpopt, "k")) {
1334 *exflagsp |= MNT_EXKERB;
1335 opt_flags |= OP_KERB;
1336 } else if (cpoptarg && (!strcmp(cpopt, "mask") ||
1337 !strcmp(cpopt, "m"))) {
1338 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) {
1339 syslog(LOG_ERR, "bad mask: %s", cpoptarg);
1340 return (1);
1341 }
1342 usedarg++;
1343 opt_flags |= OP_MASK;
1344 } else if (cpoptarg && (!strcmp(cpopt, "network") ||
1345 !strcmp(cpopt, "n"))) {
1346 if (grp->gr_type != GT_NULL) {
1347 syslog(LOG_ERR, "network/host conflict");
1348 return (1);
1349 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) {
1350 syslog(LOG_ERR, "bad net: %s", cpoptarg);
1351 return (1);
1352 }
1353 grp->gr_type = GT_NET;
1354 *has_hostp = 1;
1355 usedarg++;
1356 opt_flags |= OP_NET;
1357 } else if (!strcmp(cpopt, "alldirs")) {
1358 opt_flags |= OP_ALLDIRS;
1359 } else if (!strcmp(cpopt, "public")) {
1360 *exflagsp |= MNT_EXPUBLIC;
1361 } else if (!strcmp(cpopt, "webnfs")) {
1362 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON);
1363 opt_flags |= OP_MAPALL;
1364 } else if (cpoptarg && !strcmp(cpopt, "index")) {
1365 ep->ex_indexfile = strdup(cpoptarg);
1366 } else if (!strcmp(cpopt, "quiet")) {
1367 opt_flags |= OP_QUIET;
1368 } else {
1369 syslog(LOG_ERR, "bad opt %s", cpopt);
1370 return (1);
1371 }
1372 if (usedarg >= 0) {
1373 *endcp = savedc2;
1374 **endcpp = savedc;
1375 if (usedarg > 0) {
1376 *cpp = cp;
1377 *endcpp = endcp;
1378 }
1379 return (0);
1380 }
1381 cpopt = cpoptend;
1382 }
1383 **endcpp = savedc;
1384 return (0);
1385}
1386
1387/*
1388 * Translate a character string to the corresponding list of network
1389 * addresses for a hostname.
1390 */
1391int
b5744197 1392get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp)
984263bc
MD
1393{
1394 struct grouplist *checkgrp;
1395 struct hostent *hp, *nhp;
1396 char **addrp, **naddrp;
1397 struct hostent t_host;
1398 int i;
1399 u_int32_t saddr;
1400 char *aptr[2];
1401
1402 if (grp->gr_type != GT_NULL)
1403 return (1);
1404 if ((hp = gethostbyname(cp)) == NULL) {
1405 if (isdigit(*cp)) {
1406 saddr = inet_addr(cp);
1407 if (saddr == -1) {
1408 syslog(LOG_ERR, "inet_addr failed for %s", cp);
1409 return (1);
1410 }
15b85273 1411 if ((hp = gethostbyaddr(&saddr, sizeof (saddr),
984263bc
MD
1412 AF_INET)) == NULL) {
1413 hp = &t_host;
1414 hp->h_name = cp;
1415 hp->h_addrtype = AF_INET;
1416 hp->h_length = sizeof (u_int32_t);
1417 hp->h_addr_list = aptr;
1418 aptr[0] = (char *)&saddr;
1419 aptr[1] = (char *)NULL;
1420 }
1421 } else {
1422 syslog(LOG_ERR, "gethostbyname failed for %s", cp);
1423 return (1);
1424 }
1425 }
1426 /*
1427 * Sanity check: make sure we don't already have an entry
1428 * for this host in the grouplist.
1429 */
1430 checkgrp = tgrp;
1431 while (checkgrp != NULL) {
1432 if (checkgrp->gr_type == GT_HOST &&
1433 checkgrp->gr_ptr.gt_hostent != NULL &&
1434 (!strcmp(checkgrp->gr_ptr.gt_hostent->h_name, hp->h_name)
1435 || *(u_int32_t *)checkgrp->gr_ptr.gt_hostent->h_addr ==
1436 *(u_int32_t *)hp->h_addr)) {
1437 grp->gr_type = GT_IGNORE;
1438 return(0);
1439 }
1440 checkgrp = checkgrp->gr_next;
1441 }
1442
1443 grp->gr_type = GT_HOST;
1444 nhp = grp->gr_ptr.gt_hostent = (struct hostent *)
1445 malloc(sizeof(struct hostent));
1446 if (nhp == (struct hostent *)NULL)
1447 out_of_mem();
1448 memmove(nhp, hp, sizeof(struct hostent));
1449 i = strlen(hp->h_name)+1;
1450 nhp->h_name = (char *)malloc(i);
1451 if (nhp->h_name == (char *)NULL)
1452 out_of_mem();
1453 memmove(nhp->h_name, hp->h_name, i);
1454 addrp = hp->h_addr_list;
1455 i = 1;
1456 while (*addrp++)
1457 i++;
1458 naddrp = nhp->h_addr_list = (char **)malloc(i*sizeof(char *));
1459 if (naddrp == (char **)NULL)
1460 out_of_mem();
1461 addrp = hp->h_addr_list;
1462 while (*addrp) {
1463 *naddrp = (char *)malloc(hp->h_length);
1464 if (*naddrp == (char *)NULL)
1465 out_of_mem();
1466 memmove(*naddrp, *addrp, hp->h_length);
1467 addrp++;
1468 naddrp++;
1469 }
1470 *naddrp = (char *)NULL;
1471 if (debug)
1472 warnx("got host %s", hp->h_name);
1473 return (0);
1474}
1475
1476/*
1477 * Free up an exports list component
1478 */
1479void
b5744197 1480free_exp(struct exportlist *ep)
984263bc
MD
1481{
1482
1483 if (ep->ex_defdir) {
1484 free_host(ep->ex_defdir->dp_hosts);
1485 free((caddr_t)ep->ex_defdir);
1486 }
1487 if (ep->ex_fsdir)
1488 free(ep->ex_fsdir);
1489 if (ep->ex_indexfile)
1490 free(ep->ex_indexfile);
1491 free_dir(ep->ex_dirl);
1492 free((caddr_t)ep);
1493}
1494
1495/*
1496 * Free hosts.
1497 */
1498void
b5744197 1499free_host(struct hostlist *hp)
984263bc
MD
1500{
1501 struct hostlist *hp2;
1502
1503 while (hp) {
1504 hp2 = hp;
1505 hp = hp->ht_next;
1506 free((caddr_t)hp2);
1507 }
1508}
1509
1510struct hostlist *
b5744197 1511get_ht(void)
984263bc
MD
1512{
1513 struct hostlist *hp;
1514
1515 hp = (struct hostlist *)malloc(sizeof (struct hostlist));
1516 if (hp == (struct hostlist *)NULL)
1517 out_of_mem();
1518 hp->ht_next = (struct hostlist *)NULL;
1519 hp->ht_flag = 0;
1520 return (hp);
1521}
1522
1523/*
1524 * Out of memory, fatal
1525 */
1526void
b5744197 1527out_of_mem(void)
984263bc
MD
1528{
1529
1530 syslog(LOG_ERR, "out of memory");
1531 exit(2);
1532}
1533
1534/*
1535 * Do the mount syscall with the update flag to push the export info into
1536 * the kernel.
1537 */
1538int
b5744197
HP
1539do_mount(struct exportlist *ep, struct grouplist *grp, int exflags,
1540 struct ucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb)
984263bc
MD
1541{
1542 struct statfs fsb1;
1543 char *cp = NULL;
1544 u_int32_t **addrp;
1545 int done;
1546 char savedc = '\0';
1547 struct sockaddr_in sin, imask;
1548 union {
1549 struct ufs_args ua;
1550 struct iso_args ia;
1551 struct mfs_args ma;
1552#ifdef __NetBSD__
1553 struct msdosfs_args da;
1554#endif
1555 struct ntfs_args na;
1556 } args;
1557 u_int32_t net;
1558
1559 args.ua.fspec = 0;
1560 args.ua.export.ex_flags = exflags;
1561 args.ua.export.ex_anon = *anoncrp;
1562 args.ua.export.ex_indexfile = ep->ex_indexfile;
1563 memset(&sin, 0, sizeof(sin));
1564 memset(&imask, 0, sizeof(imask));
1565 sin.sin_family = AF_INET;
1566 sin.sin_len = sizeof(sin);
1567 imask.sin_family = AF_INET;
1568 imask.sin_len = sizeof(sin);
1569 if (grp->gr_type == GT_HOST)
1570 addrp = (u_int32_t **)grp->gr_ptr.gt_hostent->h_addr_list;
1571 else
1572 addrp = (u_int32_t **)NULL;
1573 done = FALSE;
1574 while (!done) {
1575 switch (grp->gr_type) {
1576 case GT_HOST:
1577 if (addrp) {
1578 sin.sin_addr.s_addr = **addrp;
1579 args.ua.export.ex_addrlen = sizeof(sin);
1580 } else
1581 args.ua.export.ex_addrlen = 0;
1582 args.ua.export.ex_addr = (struct sockaddr *)&sin;
1583 args.ua.export.ex_masklen = 0;
1584 break;
1585 case GT_NET:
1586 if (grp->gr_ptr.gt_net.nt_mask)
1587 imask.sin_addr.s_addr = grp->gr_ptr.gt_net.nt_mask;
1588 else {
1589 net = ntohl(grp->gr_ptr.gt_net.nt_net);
1590 if (IN_CLASSA(net))
1591 imask.sin_addr.s_addr = inet_addr("255.0.0.0");
1592 else if (IN_CLASSB(net))
1593 imask.sin_addr.s_addr =
1594 inet_addr("255.255.0.0");
1595 else
1596 imask.sin_addr.s_addr =
1597 inet_addr("255.255.255.0");
1598 grp->gr_ptr.gt_net.nt_mask = imask.sin_addr.s_addr;
1599 }
1600 sin.sin_addr.s_addr = grp->gr_ptr.gt_net.nt_net;
1601 args.ua.export.ex_addr = (struct sockaddr *)&sin;
1602 args.ua.export.ex_addrlen = sizeof (sin);
1603 args.ua.export.ex_mask = (struct sockaddr *)&imask;
1604 args.ua.export.ex_masklen = sizeof (imask);
1605 break;
1606 case GT_IGNORE:
1607 return(0);
1608 break;
1609 default:
1610 syslog(LOG_ERR, "bad grouptype");
1611 if (cp)
1612 *cp = savedc;
1613 return (1);
1614 };
1615
1616 /*
1617 * XXX:
1618 * Maybe I should just use the fsb->f_mntonname path instead
1619 * of looping back up the dirp to the mount point??
1620 * Also, needs to know how to export all types of local
1621 * exportable file systems and not just "ufs".
1622 */
1aa89f17
MD
1623 for (;;) {
1624 int r;
1625
1626 r = mountctl(fsb->f_mntonname, MOUNTCTL_SET_EXPORT,
1627 -1,
1628 &args.ua.export, sizeof(args.ua.export),
1629 NULL, 0);
1630 if (r < 0 && errno == EOPNOTSUPP) {
1631 r = mount(fsb->f_fstypename, dirp,
1632 fsb->f_flags | MNT_UPDATE,
1633 (caddr_t)&args);
1634 }
1635 if (r >= 0)
1636 break;
984263bc
MD
1637 if (cp)
1638 *cp-- = savedc;
1639 else
1640 cp = dirp + dirplen - 1;
1641 if (opt_flags & OP_QUIET)
1642 return (1);
1643 if (errno == EPERM) {
1644 syslog(LOG_ERR,
1645 "can't change attributes for %s", dirp);
1646 return (1);
1647 }
1648 if (opt_flags & OP_ALLDIRS) {
1649 if (errno == EINVAL)
1650 syslog(LOG_ERR,
1651 "-alldirs requested but %s is not a filesystem mountpoint",
1652 dirp);
1653 else
1654 syslog(LOG_ERR,
1655 "could not remount %s: %m",
1656 dirp);
1657 return (1);
1658 }
1659 /* back up over the last component */
1660 while (*cp == '/' && cp > dirp)
1661 cp--;
1662 while (*(cp - 1) != '/' && cp > dirp)
1663 cp--;
1664 if (cp == dirp) {
1665 if (debug)
1666 warnx("mnt unsucc");
1667 syslog(LOG_ERR, "can't export %s", dirp);
1668 return (1);
1669 }
1670 savedc = *cp;
1671 *cp = '\0';
1672 /* Check that we're still on the same filesystem. */
1673 if (statfs(dirp, &fsb1) != 0 || bcmp(&fsb1.f_fsid,
1674 &fsb->f_fsid, sizeof(fsb1.f_fsid)) != 0) {
1675 *cp = savedc;
1676 syslog(LOG_ERR, "can't export %s", dirp);
1677 return (1);
1678 }
1679 }
1680 if (addrp) {
1681 ++addrp;
1682 if (*addrp == (u_int32_t *)NULL)
1683 done = TRUE;
1684 } else
1685 done = TRUE;
1686 }
1687 if (cp)
1688 *cp = savedc;
1689 return (0);
1690}
1691
1692/*
1693 * Translate a net address.
1694 */
1695int
b5744197 1696get_net(char *cp, struct netmsk *net, int maskflg)
984263bc
MD
1697{
1698 struct netent *np;
1699 long netaddr;
1700 struct in_addr inetaddr, inetaddr2;
1701 char *name;
1702
1703 if (isdigit(*cp) && ((netaddr = inet_network(cp)) != -1)) {
1704 inetaddr = inet_makeaddr(netaddr, 0);
1705 /*
1706 * Due to arbitrary subnet masks, you don't know how many
1707 * bits to shift the address to make it into a network,
1708 * however you do know how to make a network address into
1709 * a host with host == 0 and then compare them.
1710 * (What a pest)
1711 */
1712 if (!maskflg) {
1713 setnetent(0);
1714 while ((np = getnetent())) {
1715 inetaddr2 = inet_makeaddr(np->n_net, 0);
1716 if (inetaddr2.s_addr == inetaddr.s_addr)
1717 break;
1718 }
1719 endnetent();
1720 }
1721 } else if ((np = getnetbyname(cp)) != NULL) {
1722 inetaddr = inet_makeaddr(np->n_net, 0);
1723 } else
1724 return (1);
1725
1726 if (maskflg)
1727 net->nt_mask = inetaddr.s_addr;
1728 else {
1729 if (np)
1730 name = np->n_name;
1731 else
1732 name = inet_ntoa(inetaddr);
1733 net->nt_name = (char *)malloc(strlen(name) + 1);
1734 if (net->nt_name == (char *)NULL)
1735 out_of_mem();
1736 strcpy(net->nt_name, name);
1737 net->nt_net = inetaddr.s_addr;
1738 }
1739 return (0);
1740}
1741
1742/*
1743 * Parse out the next white space separated field
1744 */
1745void
b5744197 1746nextfield(char **cp, char **endcp)
984263bc
MD
1747{
1748 char *p;
1749
1750 p = *cp;
1751 while (*p == ' ' || *p == '\t')
1752 p++;
1753 if (*p == '\n' || *p == '\0')
1754 *cp = *endcp = p;
1755 else {
1756 *cp = p++;
1757 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0')
1758 p++;
1759 *endcp = p;
1760 }
1761}
1762
1763/*
1764 * Get an exports file line. Skip over blank lines and handle line
1765 * continuations.
1766 */
1767int
b5744197 1768get_line(void)
984263bc
MD
1769{
1770 char *p, *cp;
1771 int len;
1772 int totlen, cont_line;
1773
1774 /*
1775 * Loop around ignoring blank lines and getting all continuation lines.
1776 */
1777 p = line;
1778 totlen = 0;
1779 do {
1780 if (fgets(p, LINESIZ - totlen, exp_file) == NULL)
1781 return (0);
1782 len = strlen(p);
1783 cp = p + len - 1;
1784 cont_line = 0;
1785 while (cp >= p &&
1786 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) {
1787 if (*cp == '\\')
1788 cont_line = 1;
1789 cp--;
1790 len--;
1791 }
1792 if (cont_line) {
1793 *++cp = ' ';
1794 len++;
1795 }
1796 *++cp = '\0';
1797 if (len > 0) {
1798 totlen += len;
1799 if (totlen >= LINESIZ) {
1800 syslog(LOG_ERR, "exports line too long");
1801 exit(2);
1802 }
1803 p = cp;
1804 }
1805 } while (totlen == 0 || cont_line);
1806 return (1);
1807}
1808
1809/*
1810 * Parse a description of a credential.
1811 */
1812void
b5744197 1813parsecred(char *namelist, struct ucred *cr)
984263bc
MD
1814{
1815 char *name;
1816 int cnt;
1817 char *names;
1818 struct passwd *pw;
1819 struct group *gr;
1820 int ngroups, groups[NGROUPS + 1];
1821
1822 /*
1823 * Set up the unprivileged user.
1824 */
1825 cr->cr_ref = 1;
1826 cr->cr_uid = -2;
1827 cr->cr_groups[0] = -2;
1828 cr->cr_ngroups = 1;
1829 /*
1830 * Get the user's password table entry.
1831 */
1832 names = strsep(&namelist, " \t\n");
1833 name = strsep(&names, ":");
1834 if (isdigit(*name) || *name == '-')
1835 pw = getpwuid(atoi(name));
1836 else
1837 pw = getpwnam(name);
1838 /*
1839 * Credentials specified as those of a user.
1840 */
1841 if (names == NULL) {
1842 if (pw == NULL) {
1843 syslog(LOG_ERR, "unknown user: %s", name);
1844 return;
1845 }
1846 cr->cr_uid = pw->pw_uid;
1847 ngroups = NGROUPS + 1;
1848 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups))
1849 syslog(LOG_ERR, "too many groups");
1850 /*
1851 * Convert from int's to gid_t's and compress out duplicate
1852 */
1853 cr->cr_ngroups = ngroups - 1;
1854 cr->cr_groups[0] = groups[0];
1855 for (cnt = 2; cnt < ngroups; cnt++)
1856 cr->cr_groups[cnt - 1] = groups[cnt];
1857 return;
1858 }
1859 /*
1860 * Explicit credential specified as a colon separated list:
1861 * uid:gid:gid:...
1862 */
1863 if (pw != NULL)
1864 cr->cr_uid = pw->pw_uid;
1865 else if (isdigit(*name) || *name == '-')
1866 cr->cr_uid = atoi(name);
1867 else {
1868 syslog(LOG_ERR, "unknown user: %s", name);
1869 return;
1870 }
1871 cr->cr_ngroups = 0;
1872 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) {
1873 name = strsep(&names, ":");
1874 if (isdigit(*name) || *name == '-') {
1875 cr->cr_groups[cr->cr_ngroups++] = atoi(name);
1876 } else {
1877 if ((gr = getgrnam(name)) == NULL) {
1878 syslog(LOG_ERR, "unknown group: %s", name);
1879 continue;
1880 }
1881 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid;
1882 }
1883 }
1884 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS)
1885 syslog(LOG_ERR, "too many groups");
1886}
1887
1888#define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50)
1889/*
1890 * Routines that maintain the remote mounttab
1891 */
1892void
b5744197 1893get_mountlist(void)
984263bc
MD
1894{
1895 struct mountlist *mlp, **mlpp;
1896 char *host, *dirp, *cp;
1897 char str[STRSIZ];
1898 FILE *mlfile;
1899
1900 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) {
1901 if (errno == ENOENT)
1902 return;
1903 else {
1904 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST);
1905 return;
1906 }
1907 }
1908 mlpp = &mlhead;
1909 while (fgets(str, STRSIZ, mlfile) != NULL) {
1910 cp = str;
1911 host = strsep(&cp, " \t\n");
1912 dirp = strsep(&cp, " \t\n");
1913 if (host == NULL || dirp == NULL)
1914 continue;
1915 mlp = (struct mountlist *)malloc(sizeof (*mlp));
1916 if (mlp == (struct mountlist *)NULL)
1917 out_of_mem();
1918 strncpy(mlp->ml_host, host, RPCMNT_NAMELEN);
1919 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
1920 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
1921 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
1922 mlp->ml_next = (struct mountlist *)NULL;
1923 *mlpp = mlp;
1924 mlpp = &mlp->ml_next;
1925 }
1926 fclose(mlfile);
1927}
1928
1929void
b5744197 1930del_mlist(char *hostp, char *dirp)
984263bc
MD
1931{
1932 struct mountlist *mlp, **mlpp;
1933 struct mountlist *mlp2;
1934 FILE *mlfile;
1935 int fnd = 0;
1936
1937 mlpp = &mlhead;
1938 mlp = mlhead;
1939 while (mlp) {
1940 if (!strcmp(mlp->ml_host, hostp) &&
1941 (!dirp || !strcmp(mlp->ml_dirp, dirp))) {
1942 fnd = 1;
1943 mlp2 = mlp;
1944 *mlpp = mlp = mlp->ml_next;
1945 free((caddr_t)mlp2);
1946 } else {
1947 mlpp = &mlp->ml_next;
1948 mlp = mlp->ml_next;
1949 }
1950 }
1951 if (fnd) {
1952 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) {
1953 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST);
1954 return;
1955 }
1956 mlp = mlhead;
1957 while (mlp) {
1958 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
1959 mlp = mlp->ml_next;
1960 }
1961 fclose(mlfile);
1962 }
1963}
1964
1965void
b5744197 1966add_mlist(char *hostp, char *dirp)
984263bc
MD
1967{
1968 struct mountlist *mlp, **mlpp;
1969 FILE *mlfile;
1970
1971 mlpp = &mlhead;
1972 mlp = mlhead;
1973 while (mlp) {
1974 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp))
1975 return;
1976 mlpp = &mlp->ml_next;
1977 mlp = mlp->ml_next;
1978 }
1979 mlp = (struct mountlist *)malloc(sizeof (*mlp));
1980 if (mlp == (struct mountlist *)NULL)
1981 out_of_mem();
1982 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN);
1983 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
1984 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
1985 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
1986 mlp->ml_next = (struct mountlist *)NULL;
1987 *mlpp = mlp;
1988 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) {
1989 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST);
1990 return;
1991 }
1992 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
1993 fclose(mlfile);
1994}
1995
1996/*
1997 * Free up a group list.
1998 */
1999void
b5744197 2000free_grp(struct grouplist *grp)
984263bc
MD
2001{
2002 char **addrp;
2003
2004 if (grp->gr_type == GT_HOST) {
2005 if (grp->gr_ptr.gt_hostent->h_name) {
2006 addrp = grp->gr_ptr.gt_hostent->h_addr_list;
2007 while (addrp && *addrp)
2008 free(*addrp++);
2009 free((caddr_t)grp->gr_ptr.gt_hostent->h_addr_list);
2010 free(grp->gr_ptr.gt_hostent->h_name);
2011 }
2012 free((caddr_t)grp->gr_ptr.gt_hostent);
2013 } else if (grp->gr_type == GT_NET) {
2014 if (grp->gr_ptr.gt_net.nt_name)
2015 free(grp->gr_ptr.gt_net.nt_name);
2016 }
2017 free((caddr_t)grp);
2018}
2019
2020#ifdef DEBUG
2021void
2022SYSLOG(int pri, const char *fmt, ...)
2023{
2024 va_list ap;
2025
2026 va_start(ap, fmt);
2027 vfprintf(stderr, fmt, ap);
2028 va_end(ap);
2029}
2030#endif /* DEBUG */
2031
2032/*
2033 * Check options for consistency.
2034 */
2035int
b5744197 2036check_options(struct dirlist *dp)
984263bc
MD
2037{
2038
2039 if (dp == (struct dirlist *)NULL)
2040 return (1);
2041 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL) ||
2042 (opt_flags & (OP_MAPROOT | OP_KERB)) == (OP_MAPROOT | OP_KERB) ||
2043 (opt_flags & (OP_MAPALL | OP_KERB)) == (OP_MAPALL | OP_KERB)) {
2044 syslog(LOG_ERR, "-mapall, -maproot and -kerb mutually exclusive");
2045 return (1);
2046 }
2047 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) {
2048 syslog(LOG_ERR, "-mask requires -network");
2049 return (1);
2050 }
2051 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) {
2052 syslog(LOG_ERR, "-alldirs has multiple directories");
2053 return (1);
2054 }
2055 return (0);
2056}
2057
2058/*
2059 * Check an absolute directory path for any symbolic links. Return true
2060 * if no symbolic links are found.
2061 */
2062int
b5744197 2063check_dirpath(char *dirp)
984263bc
MD
2064{
2065 char *cp;
2066 int ret = 1;
2067 struct stat sb;
2068
2069 cp = dirp + 1;
2070 while (*cp && ret) {
2071 if (*cp == '/') {
2072 *cp = '\0';
2073 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
2074 ret = 0;
2075 *cp = '/';
2076 }
2077 cp++;
2078 }
2079 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
2080 ret = 0;
2081 return (ret);
2082}
2083
2084/*
2085 * Just translate an ascii string to an integer.
2086 */
2087int
af62a082 2088get_num(char *cp)
984263bc 2089{
af62a082 2090 int res = 0;
984263bc
MD
2091
2092 while (*cp) {
2093 if (*cp < '0' || *cp > '9')
2094 return (-1);
2095 res = res * 10 + (*cp++ - '0');
2096 }
2097 return (res);
2098}