2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Herb Hasler and Rick Macklem at The University of Guelph.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
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 $
41 #include <sys/param.h>
42 #include <sys/mount.h>
43 #include <sys/mountctl.h>
44 #include <sys/fcntl.h>
46 #include <sys/syslog.h>
47 #include <sys/sysctl.h>
50 #include <rpc/pmap_clnt.h>
51 #include <rpc/pmap_prot.h>
52 #include <rpcsvc/mount.h>
53 #include <vfs/nfs/rpcv2.h>
54 #include <vfs/nfs/nfsproto.h>
55 #include <vfs/nfs/nfs.h>
56 #include <vfs/ufs/ufsmount.h>
57 #include <vfs/msdosfs/msdosfsmount.h>
58 #include <vfs/ntfs/ntfsmount.h>
59 #include <vfs/isofs/cd9660/cd9660_mount.h> /* XXX need isofs in include */
61 #include <arpa/inet.h>
74 #include "pathnames.h"
81 #define MOUNTDLOCK "/var/run/mountd.lock"
85 * Structures for keeping the mount list and export list
88 struct mountlist *ml_next;
89 char ml_host[RPCMNT_NAMELEN+1];
90 char ml_dirp[RPCMNT_PATHLEN+1];
94 struct dirlist *dp_left;
95 struct dirlist *dp_right;
97 struct hostlist *dp_hosts; /* List of hosts this dir exported to */
98 char dp_dirp[1]; /* Actually malloc'd to size of dir */
101 #define DP_DEFSET 0x1
102 #define DP_HOSTSET 0x2
106 struct exportlist *ex_next;
107 struct dirlist *ex_dirl;
108 struct dirlist *ex_defdir;
115 #define EX_LINKED 0x1
118 struct sockaddr_storage nt_net;
124 struct addrinfo *gt_addrinfo;
125 struct netmsk gt_net;
130 union grouptypes gr_ptr;
131 struct grouplist *gr_next;
137 #define GT_DEFAULT 0x3
138 #define GT_IGNORE 0x5
141 int ht_flag; /* Uses DP_xx bits */
142 struct grouplist *ht_grp;
143 struct hostlist *ht_next;
153 char *add_expdir(struct dirlist **, char *, int);
154 void add_dlist(struct dirlist **, struct dirlist *,
155 struct grouplist *, int);
156 void add_mlist(char *, char *);
157 int check_dirpath(char *);
158 int check_options(struct dirlist *);
159 int chk_host(struct dirlist *, struct sockaddr *, int *, int *);
160 void del_mlist(char *, char *);
161 struct dirlist *dirp_search(struct dirlist *, char *);
162 int do_mount(struct exportlist *, struct grouplist *, int,
163 struct ucred *, char *, int, struct statfs *);
164 int do_opt(char **, char **, struct exportlist *, struct grouplist *,
165 int *, int *, struct ucred *);
166 struct exportlist *ex_search(fsid_t *);
167 struct exportlist *get_exp(void);
168 void free_dir(struct dirlist *);
169 void free_exp(struct exportlist *);
170 void free_grp(struct grouplist *);
171 void free_host(struct hostlist *);
172 void get_exportlist(void);
173 int get_host(char *, struct grouplist *, struct grouplist *);
174 struct hostlist *get_ht(void);
176 void get_mountlist(void);
177 int get_net(char *, struct netmsk *, int);
178 void getexp_err(struct exportlist *, struct grouplist *);
179 struct grouplist *get_grp(void);
180 void hang_dirp(struct dirlist *, struct grouplist *,
181 struct exportlist *, int);
182 void huphandler(int sig);
183 void mntsrv(struct svc_req *, SVCXPRT *);
184 void nextfield(char **, char **);
185 void out_of_mem(void);
186 void parsecred(char *, struct ucred *);
187 int put_exlist(struct dirlist *, XDR *, struct dirlist *, int *);
188 int scan_tree(struct dirlist *, struct sockaddr *);
189 static void usage(void);
190 int xdr_dir(XDR *, char *);
191 int xdr_explist(XDR *, caddr_t);
192 int xdr_fhs(XDR *, caddr_t);
193 int xdr_mlist(XDR *, caddr_t);
196 static int allones(struct sockaddr_storage *, int);
197 static int bitcmp(void *, void *, int);
198 static int countones(struct sockaddr *);
199 static int netpartcmp(struct sockaddr *, struct sockaddr *, int);
200 static int sacmp(struct sockaddr *, struct sockaddr *);
202 struct exportlist *exphead;
203 struct mountlist *mlhead;
204 struct grouplist *grphead;
205 char exname[MAXPATHLEN];
206 struct ucred def_anon = {
213 int resvport_only = 1;
219 static int have_v6 = 1;
220 #ifdef NI_WITHSCOPEID
221 static const int ninumeric = NI_NUMERICHOST | NI_WITHSCOPEID;
223 static const int ninumeric = NI_NUMERICHOST;
228 #define OP_MAPROOT 0x01
229 #define OP_MAPALL 0x02
233 #define OP_ALLDIRS 0x40
234 /* 0x80 is OP_HAVEMASK in FreeBSD 5+ */
235 #define OP_QUIET 0x100
236 #define OP_MASKLEN 0x200
240 void SYSLOG(int, const char *, ...);
241 #define syslog SYSLOG
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.
254 main(int argc, char **argv)
257 SVCXPRT *udptransp, *tcptransp, *udp6transp, *tcp6transp;
258 struct netconfig *udpconf, *tcpconf, *udp6conf, *tcp6conf;
259 int udpsock, tcpsock, udp6sock, tcp6sock;
262 int c, error, mib[3];
265 udp6conf = tcp6conf = NULL;
266 udp6sock = tcp6sock = 0;
268 /* Check that another mountd isn't already running. */
269 if ((mountdlockfd = (open(MOUNTDLOCK, O_RDONLY|O_CREAT, 0444))) == -1)
270 err(1, "%s", MOUNTDLOCK);
272 if(flock(mountdlockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK)
273 errx(1, "another rpc.mountd is already running. Aborting");
274 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
279 error = getvfsbyname("nfs", &vfc);
280 if (error && vfsisloadable("nfs")) {
282 err(1, "vfsload(nfs)");
283 endvfsent(); /* flush cache */
284 error = getvfsbyname("nfs", &vfc);
287 errx(1, "NFS support is not available in the running kernel");
289 while ((c = getopt(argc, argv, "2dlnr")) != -1)
301 debug = debug ? 0 : 1;
315 strncpy(exname, *argv, MAXPATHLEN-1);
316 exname[MAXPATHLEN-1] = '\0';
318 strcpy(exname, _PATH_EXPORTS);
319 openlog("mountd", LOG_PID, LOG_DAEMON);
321 warnx("getting export list");
324 warnx("getting mount list");
330 signal(SIGINT, SIG_IGN);
331 signal(SIGQUIT, SIG_IGN);
333 signal(SIGHUP, huphandler);
334 signal(SIGTERM, terminate);
335 { FILE *pidfile = fopen(_PATH_MOUNTDPID, "w");
336 if (pidfile != NULL) {
337 fprintf(pidfile, "%d\n", getpid());
341 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL);
342 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL);
343 udpsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
344 tcpsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
345 udpconf = getnetconfigent("udp");
346 tcpconf = getnetconfigent("tcp");
349 udp6sock = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
350 tcp6sock = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
352 * We're doing host-based access checks here, so don't allow
353 * v4-in-v6 to confuse things. The kernel will disable it
354 * by default on NFS sockets too.
356 if (udp6sock != -1 && setsockopt(udp6sock, IPPROTO_IPV6,
357 IPV6_BINDV6ONLY, &one, sizeof one) < 0){
358 syslog(LOG_ERR, "can't disable v4-in-v6 on UDP socket");
361 if (tcp6sock != -1 && setsockopt(tcp6sock, IPPROTO_IPV6,
362 IPV6_BINDV6ONLY, &one, sizeof one) < 0){
363 syslog(LOG_ERR, "can't disable v4-in-v6 on UDP socket");
366 udp6conf = getnetconfigent("udp6");
367 tcp6conf = getnetconfigent("tcp6");
370 if (!resvport_only) {
372 mib[1] = vfc.vfc_typenum;
373 mib[2] = NFS_NFSPRIVPORT;
374 if (sysctl(mib, 3, NULL, NULL, &resvport_only,
375 sizeof(resvport_only)) != 0 && errno != ENOENT) {
376 syslog(LOG_ERR, "sysctl: %m");
380 if ((udptransp = svcudp_create(RPC_ANYSOCK)) == NULL ||
381 (tcptransp = svctcp_create(RPC_ANYSOCK, 0, 0)) == NULL) {
382 syslog(LOG_ERR, "can't create socket");
385 if (udpsock != -1 && udpconf != NULL) {
386 bindresvport(udpsock, NULL);
387 udptransp = svc_dg_create(udpsock, 0, 0);
388 if (udptransp != NULL) {
389 if (!svc_reg(udptransp, RPCPROG_MNT, RPCMNT_VER1,
391 syslog(LOG_WARNING, "can't register UDP RPCMNT_VER1 service");
395 if (!svc_reg(udptransp, RPCPROG_MNT, RPCMNT_VER3,
397 syslog(LOG_WARNING, "can't register UDP RPCMNT_VER3 service");
402 syslog(LOG_WARNING, "can't create UDP services");
405 if (tcpsock != -1 && tcpconf != NULL) {
406 bindresvport(tcpsock, NULL);
407 listen(tcpsock, SOMAXCONN);
408 tcptransp = svc_vc_create(tcpsock, 0, 0);
409 if (tcptransp != NULL) {
410 if (!svc_reg(tcptransp, RPCPROG_MNT, RPCMNT_VER1,
412 syslog(LOG_WARNING, "can't register TCP RPCMNT_VER1 service");
416 if (!svc_reg(tcptransp, RPCPROG_MNT, RPCMNT_VER3,
418 syslog(LOG_WARNING, "can't register TCP RPCMNT_VER3 service");
423 syslog(LOG_WARNING, "can't create TCP service");
426 if (have_v6 && udp6sock != -1 && udp6conf != NULL) {
427 bindresvport(udp6sock, NULL);
428 udp6transp = svc_dg_create(udp6sock, 0, 0);
429 if (udp6transp != NULL) {
430 if (!svc_reg(udp6transp, RPCPROG_MNT, RPCMNT_VER1,
432 syslog(LOG_WARNING, "can't register UDP6 RPCMNT_VER1 service");
436 if (!svc_reg(udp6transp, RPCPROG_MNT, RPCMNT_VER3,
438 syslog(LOG_WARNING, "can't register UDP6 RPCMNT_VER3 service");
443 syslog(LOG_WARNING, "can't create UDP6 service");
446 if (have_v6 && tcp6sock != -1 && tcp6conf != NULL) {
447 bindresvport(tcp6sock, NULL);
448 listen(tcp6sock, SOMAXCONN);
449 tcp6transp = svc_vc_create(tcp6sock, 0, 0);
450 if (tcp6transp != NULL) {
451 if (!svc_reg(tcp6transp, RPCPROG_MNT, RPCMNT_VER1,
453 syslog(LOG_WARNING, "can't register TCP6 RPCMNT_VER1 service");
457 if (!svc_reg(tcp6transp, RPCPROG_MNT, RPCMNT_VER3,
459 syslog(LOG_WARNING, "can't register TCP6 RPCMNT_VER3 service");
464 syslog(LOG_WARNING, "can't create TCP6 service");
468 syslog(LOG_ERR, "could not create any services");
472 /* Expand svc_run() here so that we can call get_exportlist(). */
479 switch (select(svc_maxfd + 1, &readfds, NULL, NULL, NULL)) {
483 syslog(LOG_ERR, "mountd died: select: %m");
488 svc_getreqset(&readfds);
497 "usage: mountd [-2] [-d] [-l] [-n] [-r] [export_file]\n");
502 * The mount rpc service
505 mntsrv(struct svc_req *rqstp, SVCXPRT *transp)
507 struct exportlist *ep;
512 char host[NI_MAXHOST], numerichost[NI_MAXHOST];
513 int lookup_failed = 1;
514 struct sockaddr *saddr;
516 char rpcpath[RPCMNT_PATHLEN + 1], dirpath[MAXPATHLEN];
517 int bad = 0, defset, hostset;
518 sigset_t sighup_mask;
520 sigemptyset(&sighup_mask);
521 sigaddset(&sighup_mask, SIGHUP);
522 saddr = svc_getrpccaller(transp)->buf;
523 switch (saddr->sa_family) {
525 sport = ntohs(((struct sockaddr_in6 *)saddr)->sin6_port);
528 sport = ntohs(((struct sockaddr_in *)saddr)->sin_port);
531 syslog(LOG_ERR, "request from unknown address family");
534 lookup_failed = getnameinfo(saddr, saddr->sa_len, host, sizeof host,
536 getnameinfo(saddr, saddr->sa_len, numerichost,
537 sizeof numerichost, NULL, 0, NI_NUMERICHOST);
538 switch (rqstp->rq_proc) {
540 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
541 syslog(LOG_ERR, "can't send reply");
544 if (sport >= IPPORT_RESERVED && resvport_only) {
546 "mount request from %s from unprivileged port",
548 svcerr_weakauth(transp);
551 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) {
552 syslog(LOG_NOTICE, "undecodable mount request from %s",
554 svcerr_decode(transp);
559 * Get the real pathname and make sure it is a directory
560 * or a regular file if the -r option was specified
563 if (realpath(rpcpath, dirpath) == NULL ||
564 stat(dirpath, &stb) < 0 ||
565 (!S_ISDIR(stb.st_mode) &&
566 (dir_only || !S_ISREG(stb.st_mode))) ||
567 statfs(dirpath, &fsb) < 0) {
568 chdir("/"); /* Just in case realpath doesn't */
570 "mount request from %s for non existent path %s",
571 numerichost, dirpath);
573 warnx("stat failed on %s", dirpath);
574 bad = ENOENT; /* We will send error reply later */
577 /* Check in the exports list */
578 sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
579 ep = ex_search(&fsb.f_fsid);
580 hostset = defset = 0;
581 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset) ||
582 ((dp = dirp_search(ep->ex_dirl, dirpath)) &&
583 chk_host(dp, saddr, &defset, &hostset)) ||
584 (defset && scan_tree(ep->ex_defdir, saddr) == 0 &&
585 scan_tree(ep->ex_dirl, saddr) == 0))) {
587 if (!svc_sendreply(transp, (xdrproc_t)xdr_long,
589 syslog(LOG_ERR, "can't send reply");
590 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
593 if (hostset & DP_HOSTSET)
594 fhr.fhr_flag = hostset;
596 fhr.fhr_flag = defset;
597 fhr.fhr_vers = rqstp->rq_vers;
598 /* Get the file handle */
599 memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t));
600 if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) {
602 syslog(LOG_ERR, "can't get fh for %s", dirpath);
603 if (!svc_sendreply(transp, (xdrproc_t)xdr_long,
605 syslog(LOG_ERR, "can't send reply");
606 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
609 if (!svc_sendreply(transp, (xdrproc_t)xdr_fhs, &fhr))
610 syslog(LOG_ERR, "can't send reply");
612 add_mlist(host, dirpath);
614 add_mlist(numerichost, dirpath);
616 warnx("mount successful");
619 "mount request succeeded from %s for %s",
620 numerichost, dirpath);
624 "mount request denied from %s for %s",
625 numerichost, dirpath);
628 if (bad && !svc_sendreply(transp, (xdrproc_t)xdr_long, &bad))
629 syslog(LOG_ERR, "can't send reply");
630 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
633 if (!svc_sendreply(transp, (xdrproc_t)xdr_mlist, NULL))
634 syslog(LOG_ERR, "can't send reply");
637 "dump request succeeded from %s",
641 if (sport >= IPPORT_RESERVED && resvport_only) {
643 "umount request from %s from unprivileged port",
645 svcerr_weakauth(transp);
648 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) {
649 syslog(LOG_NOTICE, "undecodable umount request from %s",
651 svcerr_decode(transp);
654 if (realpath(rpcpath, dirpath) == NULL) {
655 syslog(LOG_NOTICE, "umount request from %s "
656 "for non existent path %s",
657 numerichost, dirpath);
659 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
660 syslog(LOG_ERR, "can't send reply");
662 del_mlist(host, dirpath);
663 del_mlist(numerichost, dirpath);
666 "umount request succeeded from %s for %s",
667 numerichost, dirpath);
670 if (sport >= IPPORT_RESERVED && resvport_only) {
672 "umountall request from %s from unprivileged port",
674 svcerr_weakauth(transp);
677 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL))
678 syslog(LOG_ERR, "can't send reply");
680 del_mlist(host, NULL);
681 del_mlist(numerichost, NULL);
684 "umountall request succeeded from %s",
688 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist, NULL))
689 syslog(LOG_ERR, "can't send reply");
692 "export request succeeded from %s",
696 svcerr_noproc(transp);
702 * Xdr conversion for a dirpath string
705 xdr_dir(XDR *xdrsp, char *dirp)
707 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
711 * Xdr routine to generate file handle reply
714 xdr_fhs(XDR *xdrsp, caddr_t cp)
716 struct fhreturn *fhrp = (struct fhreturn *)cp;
717 u_long ok = 0, len, auth;
719 if (!xdr_long(xdrsp, &ok))
721 switch (fhrp->fhr_vers) {
723 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH));
726 if (!xdr_long(xdrsp, &len))
728 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len))
730 if (fhrp->fhr_flag & DP_KERB)
731 auth = RPCAUTH_KERB4;
735 if (!xdr_long(xdrsp, &len))
737 return (xdr_long(xdrsp, &auth));
743 xdr_mlist(XDR *xdrsp, caddr_t cp)
745 struct mountlist *mlp;
752 if (!xdr_bool(xdrsp, &true))
754 strp = &mlp->ml_host[0];
755 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
757 strp = &mlp->ml_dirp[0];
758 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
762 if (!xdr_bool(xdrsp, &false))
768 * Xdr conversion for export list
771 xdr_explist(XDR *xdrsp, caddr_t cp)
773 struct exportlist *ep;
776 sigset_t sighup_mask;
778 sigemptyset(&sighup_mask);
779 sigaddset(&sighup_mask, SIGHUP);
780 sigprocmask(SIG_BLOCK, &sighup_mask, NULL);
784 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, &putdef))
786 if (ep->ex_defdir && putdef == 0 &&
787 put_exlist(ep->ex_defdir, xdrsp, NULL,
792 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
793 if (!xdr_bool(xdrsp, &false))
797 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL);
802 * Called from xdr_explist() to traverse the tree and export the
806 put_exlist(struct dirlist *dp, XDR *xdrsp, struct dirlist *adp, int *putdefp)
808 struct grouplist *grp;
816 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp))
818 if (!xdr_bool(xdrsp, &true))
821 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
823 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) {
827 if ((dp->dp_flag & DP_DEFSET) == 0 &&
828 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) {
832 if (grp->gr_type == GT_HOST) {
833 if (!xdr_bool(xdrsp, &true))
835 strp = grp->gr_ptr.gt_addrinfo->ai_canonname;
836 if (!xdr_string(xdrsp, &strp,
839 } else if (grp->gr_type == GT_NET) {
840 if (!xdr_bool(xdrsp, &true))
842 strp = grp->gr_ptr.gt_net.nt_name;
843 if (!xdr_string(xdrsp, &strp,
848 if (gotalldir && hp == NULL) {
854 if (!xdr_bool(xdrsp, &false))
856 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp))
862 #define LINESIZ 10240
867 * Get the export list
872 struct exportlist *ep, *ep2;
873 struct grouplist *grp, *tgrp;
874 struct exportlist **epp;
875 struct dirlist *dirhead;
876 struct statfs fsb, *fsp;
878 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc;
879 int len, has_host, exflags, got_nondir, dirplen, num, i, netgrp;
885 * First, get rid of the old list
904 * And delete exports that are in the kernel for all local
906 * XXX: Should know how to handle all local exportable file systems
907 * instead of just "ufs".
909 num = getmntinfo(&fsp, MNT_NOWAIT);
910 for (i = 0; i < num; i++) {
915 struct msdosfs_args da;
918 struct export_args export;
920 export.ex_flags = MNT_DELEXPORT;
921 if (mountctl(fsp->f_mntonname, MOUNTCTL_SET_EXPORT, -1,
922 &export, sizeof(export), NULL, 0) == 0) {
923 } else if (!strcmp(fsp->f_fstypename, "mfs") ||
924 !strcmp(fsp->f_fstypename, "ufs") ||
925 !strcmp(fsp->f_fstypename, "msdos") ||
926 !strcmp(fsp->f_fstypename, "ntfs") ||
927 !strcmp(fsp->f_fstypename, "cd9660")) {
928 targs.ua.fspec = NULL;
929 targs.ua.export.ex_flags = MNT_DELEXPORT;
930 if (mount(fsp->f_fstypename, fsp->f_mntonname,
931 fsp->f_flags | MNT_UPDATE,
932 (caddr_t)&targs) < 0)
933 syslog(LOG_ERR, "can't delete exports for %s",
940 * Read in the exports file and build the list, calling
941 * mount() as we go along to push the export rules into the kernel.
943 if ((exp_file = fopen(exname, "r")) == NULL) {
944 syslog(LOG_ERR, "can't open %s", exname);
950 warnx("got line %s", line);
952 nextfield(&cp, &endcp);
961 exflags = MNT_EXPORTED;
967 * Create new exports list entry
970 tgrp = grp = get_grp();
972 if (len > RPCMNT_NAMELEN) {
973 getexp_err(ep, tgrp);
978 getexp_err(ep, tgrp);
982 warnx("doing opt %s", cp);
984 if (do_opt(&cp, &endcp, ep, grp, &has_host,
986 getexp_err(ep, tgrp);
989 } else if (*cp == '/') {
992 if (check_dirpath(cp) &&
993 statfs(cp, &fsb) >= 0) {
995 syslog(LOG_ERR, "dirs must be first");
996 getexp_err(ep, tgrp);
1000 if (ep->ex_fs.val[0] != fsb.f_fsid.val[0] ||
1001 ep->ex_fs.val[1] != fsb.f_fsid.val[1]) {
1002 getexp_err(ep, tgrp);
1007 * See if this directory is already
1010 ep = ex_search(&fsb.f_fsid);
1013 ep->ex_fs = fsb.f_fsid;
1014 ep->ex_fsdir = (char *)
1015 malloc(strlen(fsb.f_mntonname) + 1);
1017 strcpy(ep->ex_fsdir,
1022 warnx("making new ep fs=0x%x,0x%x",
1026 warnx("found ep fs=0x%x,0x%x",
1032 * Add dirpath to export mount point.
1034 dirp = add_expdir(&dirhead, cp, len);
1037 getexp_err(ep, tgrp);
1046 getexp_err(ep, tgrp);
1051 * Get the host or netgroup.
1054 netgrp = getnetgrent(&hst, &usr, &dom);
1057 grp->gr_next = get_grp();
1063 "null hostname in netgroup %s, skipping", cp);
1064 grp->gr_type = GT_IGNORE;
1065 } else if (get_host(hst, grp, tgrp)) {
1067 "bad host %s in netgroup %s, skipping", hst, cp);
1068 grp->gr_type = GT_IGNORE;
1070 } else if (get_host(cp, grp, tgrp)) {
1071 syslog(LOG_ERR, "bad host %s, skipping", cp);
1072 grp->gr_type = GT_IGNORE;
1075 } while (netgrp && getnetgrent(&hst, &usr, &dom));
1080 nextfield(&cp, &endcp);
1083 if (check_options(dirhead)) {
1084 getexp_err(ep, tgrp);
1088 grp->gr_type = GT_DEFAULT;
1090 warnx("adding a default entry");
1093 * Don't allow a network export coincide with a list of
1094 * host(s) on the same line.
1096 } else if ((opt_flags & OP_NET) && tgrp->gr_next) {
1097 getexp_err(ep, tgrp);
1101 * If an export list was specified on this line, make sure
1102 * that we have at least one valid entry, otherwise skip it.
1106 while (grp && grp->gr_type == GT_IGNORE)
1109 getexp_err(ep, tgrp);
1115 * Loop through hosts, pushing the exports into the kernel.
1116 * After loop, tgrp points to the start of the list and
1117 * grp points to the last entry in the list.
1121 if (do_mount(ep, grp, exflags, &anon, dirp, dirplen,
1123 getexp_err(ep, tgrp);
1126 } while (grp->gr_next && (grp = grp->gr_next));
1129 * Success. Update the data structures.
1132 hang_dirp(dirhead, tgrp, ep, opt_flags);
1133 grp->gr_next = grphead;
1136 hang_dirp(dirhead, NULL, ep,
1141 if ((ep->ex_flag & EX_LINKED) == 0) {
1146 * Insert in the list in alphabetical order.
1148 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) {
1149 epp = &ep2->ex_next;
1155 ep->ex_flag |= EX_LINKED;
1167 * Allocate an export list element
1172 struct exportlist *ep;
1174 ep = (struct exportlist *)malloc(sizeof (struct exportlist));
1177 memset(ep, 0, sizeof(struct exportlist));
1182 * Allocate a group list element
1187 struct grouplist *gp;
1189 gp = (struct grouplist *)malloc(sizeof (struct grouplist));
1192 memset(gp, 0, sizeof(struct grouplist));
1197 * Clean up upon an error in get_exportlist().
1200 getexp_err(struct exportlist *ep, struct grouplist *grp)
1202 struct grouplist *tgrp;
1204 if (!(opt_flags & OP_QUIET))
1205 syslog(LOG_ERR, "bad exports list line %s", line);
1206 if (ep && (ep->ex_flag & EX_LINKED) == 0)
1216 * Search the export list for a matching fs.
1219 ex_search(fsid_t *fsid)
1221 struct exportlist *ep;
1225 if (ep->ex_fs.val[0] == fsid->val[0] &&
1226 ep->ex_fs.val[1] == fsid->val[1])
1234 * Add a directory path to the list.
1237 add_expdir(struct dirlist **dpp, char *cp, int len)
1241 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len);
1245 dp->dp_right = NULL;
1247 dp->dp_hosts = NULL;
1248 strcpy(dp->dp_dirp, cp);
1250 return (dp->dp_dirp);
1254 * Hang the dir list element off the dirpath binary tree as required
1255 * and update the entry for host.
1258 hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep,
1261 struct hostlist *hp;
1262 struct dirlist *dp2;
1264 if (flags & OP_ALLDIRS) {
1270 ep->ex_defdir->dp_flag |= DP_DEFSET;
1271 if (flags & OP_KERB)
1272 ep->ex_defdir->dp_flag |= DP_KERB;
1273 } else while (grp) {
1275 if (flags & OP_KERB)
1276 hp->ht_flag |= DP_KERB;
1278 hp->ht_next = ep->ex_defdir->dp_hosts;
1279 ep->ex_defdir->dp_hosts = hp;
1285 * Loop through the directories adding them to the tree.
1289 add_dlist(&ep->ex_dirl, dp, grp, flags);
1296 * Traverse the binary tree either updating a node that is already there
1297 * for the new directory or adding the new node.
1300 add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp,
1304 struct hostlist *hp;
1309 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp);
1311 add_dlist(&dp->dp_left, newdp, grp, flags);
1313 } else if (cmp < 0) {
1314 add_dlist(&dp->dp_right, newdp, grp, flags);
1317 free((caddr_t)newdp);
1326 * Hang all of the host(s) off of the directory point.
1330 if (flags & OP_KERB)
1331 hp->ht_flag |= DP_KERB;
1333 hp->ht_next = dp->dp_hosts;
1338 dp->dp_flag |= DP_DEFSET;
1339 if (flags & OP_KERB)
1340 dp->dp_flag |= DP_KERB;
1345 * Search for a dirpath on the export point.
1348 dirp_search(struct dirlist *dp, char *dirp)
1353 cmp = strcmp(dp->dp_dirp, dirp);
1355 return (dirp_search(dp->dp_left, dirp));
1357 return (dirp_search(dp->dp_right, dirp));
1365 * Some helper functions for netmasks. They all assume masks in network
1366 * order (big endian).
1369 bitcmp(void *dst, void *src, int bitlen)
1372 u_int8_t *p1 = dst, *p2 = src;
1374 int bytelen, bitsleft;
1376 bytelen = bitlen / 8;
1377 bitsleft = bitlen % 8;
1380 printf("comparing:\n");
1381 for (i = 0; i < (bitsleft ? bytelen + 1 : bytelen); i++)
1382 printf("%02x", p1[i]);
1384 for (i = 0; i < (bitsleft ? bytelen + 1 : bytelen); i++)
1385 printf("%02x", p2[i]);
1389 for (i = 0; i < bytelen; i++) {
1396 for (i = 0; i < bitsleft; i++) {
1397 bitmask = 1 << (7 - i);
1398 if ((*p1 & bitmask) != (*p2 & bitmask))
1406 * Scan for a host match in a directory tree.
1409 chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp,
1412 struct hostlist *hp;
1413 struct grouplist *grp;
1414 struct addrinfo *ai;
1417 if (dp->dp_flag & DP_DEFSET)
1418 *defsetp = dp->dp_flag;
1422 switch (grp->gr_type) {
1424 ai = grp->gr_ptr.gt_addrinfo;
1425 for (; ai; ai = ai->ai_next) {
1426 if (!sacmp(ai->ai_addr, saddr)) {
1428 (hp->ht_flag | DP_HOSTSET);
1434 if (!netpartcmp(saddr,
1435 (struct sockaddr *) &grp->gr_ptr.gt_net.nt_net,
1436 grp->gr_ptr.gt_net.nt_mask)) {
1437 *hostsetp = (hp->ht_flag | DP_HOSTSET);
1449 * Scan tree for a host that matches the address.
1452 scan_tree(struct dirlist *dp, struct sockaddr *saddr)
1454 int defset, hostset;
1457 if (scan_tree(dp->dp_left, saddr))
1459 if (chk_host(dp, saddr, &defset, &hostset))
1461 if (scan_tree(dp->dp_right, saddr))
1468 * Traverse the dirlist tree and free it up.
1471 free_dir(struct dirlist *dp)
1475 free_dir(dp->dp_left);
1476 free_dir(dp->dp_right);
1477 free_host(dp->dp_hosts);
1483 * Parse the option string and update fields.
1484 * Option arguments may either be -<option>=<value> or
1488 do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp,
1489 int *has_hostp, int *exflagsp, struct ucred *cr)
1491 char *cpoptarg, *cpoptend;
1492 char *cp, *endcp, *cpopt, savedc, savedc2;
1493 int allflag, usedarg;
1501 while (cpopt && *cpopt) {
1504 if ((cpoptend = strchr(cpopt, ','))) {
1506 if ((cpoptarg = strchr(cpopt, '=')))
1509 if ((cpoptarg = strchr(cpopt, '=')))
1513 nextfield(&cp, &endcp);
1515 if (endcp > cp && *cp != '-') {
1523 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) {
1524 *exflagsp |= MNT_EXRDONLY;
1525 } else if (cpoptarg && (!strcmp(cpopt, "maproot") ||
1526 !(allflag = strcmp(cpopt, "mapall")) ||
1527 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) {
1529 parsecred(cpoptarg, cr);
1531 *exflagsp |= MNT_EXPORTANON;
1532 opt_flags |= OP_MAPALL;
1534 opt_flags |= OP_MAPROOT;
1535 } else if (!strcmp(cpopt, "kerb") || !strcmp(cpopt, "k")) {
1536 *exflagsp |= MNT_EXKERB;
1537 opt_flags |= OP_KERB;
1538 } else if (cpoptarg && (!strcmp(cpopt, "mask") ||
1539 !strcmp(cpopt, "m"))) {
1540 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) {
1541 syslog(LOG_ERR, "bad mask: %s", cpoptarg);
1545 opt_flags |= OP_MASK;
1546 } else if (cpoptarg && (!strcmp(cpopt, "network") ||
1547 !strcmp(cpopt, "n"))) {
1548 if (strchr(cpoptarg, '/') != NULL) {
1550 fprintf(stderr, "setting OP_MASKLEN\n");
1551 opt_flags |= OP_MASKLEN;
1553 if (grp->gr_type != GT_NULL) {
1554 syslog(LOG_ERR, "network/host conflict");
1556 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) {
1557 syslog(LOG_ERR, "bad net: %s", cpoptarg);
1560 grp->gr_type = GT_NET;
1563 opt_flags |= OP_NET;
1564 } else if (!strcmp(cpopt, "alldirs")) {
1565 opt_flags |= OP_ALLDIRS;
1566 } else if (!strcmp(cpopt, "public")) {
1567 *exflagsp |= MNT_EXPUBLIC;
1568 } else if (!strcmp(cpopt, "webnfs")) {
1569 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON);
1570 opt_flags |= OP_MAPALL;
1571 } else if (cpoptarg && !strcmp(cpopt, "index")) {
1572 ep->ex_indexfile = strdup(cpoptarg);
1573 } else if (!strcmp(cpopt, "quiet")) {
1574 opt_flags |= OP_QUIET;
1576 syslog(LOG_ERR, "bad opt %s", cpopt);
1595 * Translate a character string to the corresponding list of network
1596 * addresses for a hostname.
1599 get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp)
1601 struct grouplist *checkgrp;
1602 struct addrinfo *ai, *tai, hints;
1604 char host[NI_MAXHOST];
1606 if (grp->gr_type != GT_NULL) {
1607 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp);
1610 memset(&hints, 0, sizeof hints);
1611 hints.ai_flags = AI_CANONNAME;
1612 hints.ai_protocol = IPPROTO_UDP;
1613 ecode = getaddrinfo(cp, NULL, &hints, &ai);
1615 syslog(LOG_ERR,"can't get address info for host %s", cp);
1618 grp->gr_ptr.gt_addrinfo = ai;
1619 while (ai != NULL) {
1620 if (ai->ai_canonname == NULL) {
1621 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host,
1622 sizeof host, NULL, 0, ninumeric) != 0)
1623 strlcpy(host, "?", sizeof(host));
1624 ai->ai_canonname = strdup(host);
1625 ai->ai_flags |= AI_CANONNAME;
1628 fprintf(stderr, "got host %s\n", ai->ai_canonname);
1630 * Sanity check: make sure we don't already have an entry
1631 * for this host in the grouplist.
1633 for (checkgrp = tgrp; checkgrp != NULL;
1634 checkgrp = checkgrp->gr_next) {
1635 if (checkgrp->gr_type != GT_HOST)
1637 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL;
1638 tai = tai->ai_next) {
1639 if (sacmp(tai->ai_addr, ai->ai_addr) != 0)
1643 "ignoring duplicate host %s\n",
1645 grp->gr_type = GT_IGNORE;
1651 grp->gr_type = GT_HOST;
1656 * Free up an exports list component
1659 free_exp(struct exportlist *ep)
1662 if (ep->ex_defdir) {
1663 free_host(ep->ex_defdir->dp_hosts);
1664 free((caddr_t)ep->ex_defdir);
1668 if (ep->ex_indexfile)
1669 free(ep->ex_indexfile);
1670 free_dir(ep->ex_dirl);
1678 free_host(struct hostlist *hp)
1680 struct hostlist *hp2;
1692 struct hostlist *hp;
1694 hp = (struct hostlist *)malloc(sizeof (struct hostlist));
1703 * Out of memory, fatal
1709 syslog(LOG_ERR, "out of memory");
1714 * Do the mount syscall with the update flag to push the export info into
1718 do_mount(struct exportlist *ep, struct grouplist *grp, int exflags,
1719 struct ucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb)
1722 struct sockaddr_storage ss;
1723 struct addrinfo *ai;
1732 struct msdosfs_args da;
1733 struct adosfs_args aa;
1735 struct ntfs_args na;
1739 args.ua.export.ex_flags = exflags;
1740 args.ua.export.ex_anon = *anoncrp;
1741 args.ua.export.ex_indexfile = ep->ex_indexfile;
1742 if (grp->gr_type == GT_HOST)
1743 ai = grp->gr_ptr.gt_addrinfo;
1748 switch (grp->gr_type) {
1750 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0)
1752 args.ua.export.ex_addr = ai->ai_addr;
1753 args.ua.export.ex_addrlen = ai->ai_addrlen;
1754 args.ua.export.ex_masklen = 0;
1757 args.ua.export.ex_addr = (struct sockaddr *)
1758 &grp->gr_ptr.gt_net.nt_net;
1759 if (args.ua.export.ex_addr->sa_family == AF_INET6 &&
1762 args.ua.export.ex_addrlen =
1763 args.ua.export.ex_addr->sa_len;
1764 memset(&ss, 0, sizeof ss);
1765 ss.ss_family = args.ua.export.ex_addr->sa_family;
1766 ss.ss_len = args.ua.export.ex_addr->sa_len;
1767 if (allones(&ss, grp->gr_ptr.gt_net.nt_mask) != 0) {
1768 syslog(LOG_ERR, "Bad network flag");
1773 args.ua.export.ex_mask = (struct sockaddr *)&ss;
1774 args.ua.export.ex_masklen = ss.ss_len;
1777 args.ua.export.ex_addr = NULL;
1778 args.ua.export.ex_addrlen = 0;
1779 args.ua.export.ex_mask = NULL;
1780 args.ua.export.ex_masklen = 0;
1786 syslog(LOG_ERR, "bad grouptype");
1794 * Maybe I should just use the fsb->f_mntonname path instead
1795 * of looping back up the dirp to the mount point??
1796 * Also, needs to know how to export all types of local
1797 * exportable file systems and not just "ufs".
1802 r = mountctl(fsb->f_mntonname, MOUNTCTL_SET_EXPORT,
1804 &args.ua.export, sizeof(args.ua.export),
1806 if (r < 0 && errno == EOPNOTSUPP) {
1807 r = mount(fsb->f_fstypename, dirp,
1808 fsb->f_flags | MNT_UPDATE,
1816 cp = dirp + dirplen - 1;
1817 if (opt_flags & OP_QUIET)
1819 if (errno == EPERM) {
1821 warnx("can't change attributes for %s",
1824 "can't change attributes for %s", dirp);
1827 if (opt_flags & OP_ALLDIRS) {
1828 if (errno == EINVAL)
1830 "-alldirs requested but %s is not a filesystem mountpoint",
1834 "could not remount %s: %m",
1838 /* back up over the last component */
1839 while (*cp == '/' && cp > dirp)
1841 while (*(cp - 1) != '/' && cp > dirp)
1845 warnx("mnt unsucc");
1846 syslog(LOG_ERR, "can't export %s", dirp);
1851 /* Check that we're still on the same filesystem. */
1852 if (statfs(dirp, &fsb1) != 0 || bcmp(&fsb1.f_fsid,
1853 &fsb->f_fsid, sizeof(fsb1.f_fsid)) != 0) {
1855 syslog(LOG_ERR, "can't export %s", dirp);
1871 * Translate a net address.
1874 get_net(char *cp, struct netmsk *net, int maskflg)
1877 char *name, *p, *prefp;
1878 struct sockaddr_in sin, *sinp;
1879 struct sockaddr *sa;
1880 struct addrinfo hints, *ai = NULL;
1881 char netname[NI_MAXHOST];
1886 if ((opt_flags & OP_MASKLEN) && !maskflg) {
1887 p = strchr(cp, '/');
1892 if ((np = getnetbyname(cp)) != NULL) {
1893 sin.sin_family = AF_INET;
1894 sin.sin_len = sizeof sin;
1895 sin.sin_addr = inet_makeaddr(np->n_net, 0);
1896 sa = (struct sockaddr *)&sin;
1897 } else if (isdigit(*cp)) {
1898 memset(&hints, 0, sizeof hints);
1899 hints.ai_family = AF_UNSPEC;
1900 hints.ai_flags = AI_NUMERICHOST;
1901 if (getaddrinfo(cp, NULL, &hints, &ai) != 0) {
1903 * If getaddrinfo() failed, try the inet4 network
1904 * notation with less than 3 dots.
1906 sin.sin_family = AF_INET;
1907 sin.sin_len = sizeof sin;
1908 sin.sin_addr = inet_makeaddr(inet_network(cp),0);
1910 fprintf(stderr, "get_net: v4 addr %x\n",
1911 sin.sin_addr.s_addr);
1912 sa = (struct sockaddr *)&sin;
1915 } else if (isxdigit(*cp) || *cp == ':') {
1916 memset(&hints, 0, sizeof hints);
1917 hints.ai_family = AF_UNSPEC;
1918 hints.ai_flags = AI_NUMERICHOST;
1919 if (getaddrinfo(cp, NULL, &hints, &ai) == 0)
1926 ecode = getnameinfo(sa, sa->sa_len, netname, sizeof netname,
1927 NULL, 0, ninumeric);
1932 net->nt_mask = countones(sa);
1934 if (opt_flags & OP_MASKLEN) {
1935 preflen = strtol(prefp, NULL, 10);
1936 if (preflen == LONG_MIN && errno == ERANGE)
1938 net->nt_mask = (int)preflen;
1945 if (getnameinfo(sa, sa->sa_len, netname, sizeof netname,
1946 NULL, 0, ninumeric) != 0)
1947 strlcpy(netname, "?", sizeof(netname));
1950 net->nt_name = strdup(name);
1951 memcpy(&net->nt_net, sa, sa->sa_len);
1954 if (!maskflg && sa->sa_family == AF_INET &&
1955 !(opt_flags & (OP_MASK|OP_MASKLEN))) {
1956 sinp = (struct sockaddr_in *)sa;
1957 if (IN_CLASSA(sinp->sin_addr.s_addr))
1959 else if (IN_CLASSB(sinp->sin_addr.s_addr))
1961 else if (IN_CLASSC(sinp->sin_addr.s_addr))
1963 else if (IN_CLASSD(sinp->sin_addr.s_addr))
1966 net->nt_mask = 32; /* XXX */
1980 * Parse out the next white space separated field
1983 nextfield(char **cp, char **endcp)
1988 while (*p == ' ' || *p == '\t')
1990 if (*p == '\n' || *p == '\0')
1994 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0')
2001 * Get an exports file line. Skip over blank lines and handle line
2009 int totlen, cont_line;
2012 * Loop around ignoring blank lines and getting all continuation lines.
2017 if (fgets(p, LINESIZ - totlen, exp_file) == NULL)
2023 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) {
2036 if (totlen >= LINESIZ) {
2037 syslog(LOG_ERR, "exports line too long");
2042 } while (totlen == 0 || cont_line);
2047 * Parse a description of a credential.
2050 parsecred(char *namelist, struct ucred *cr)
2057 int ngroups, groups[NGROUPS + 1];
2060 * Set up the unprivileged user.
2064 cr->cr_groups[0] = -2;
2067 * Get the user's password table entry.
2069 names = strsep(&namelist, " \t\n");
2070 name = strsep(&names, ":");
2071 if (isdigit(*name) || *name == '-')
2072 pw = getpwuid(atoi(name));
2074 pw = getpwnam(name);
2076 * Credentials specified as those of a user.
2078 if (names == NULL) {
2080 syslog(LOG_ERR, "unknown user: %s", name);
2083 cr->cr_uid = pw->pw_uid;
2084 ngroups = NGROUPS + 1;
2085 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups))
2086 syslog(LOG_ERR, "too many groups");
2088 * Convert from int's to gid_t's and compress out duplicate
2090 cr->cr_ngroups = ngroups - 1;
2091 cr->cr_groups[0] = groups[0];
2092 for (cnt = 2; cnt < ngroups; cnt++)
2093 cr->cr_groups[cnt - 1] = groups[cnt];
2097 * Explicit credential specified as a colon separated list:
2101 cr->cr_uid = pw->pw_uid;
2102 else if (isdigit(*name) || *name == '-')
2103 cr->cr_uid = atoi(name);
2105 syslog(LOG_ERR, "unknown user: %s", name);
2109 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) {
2110 name = strsep(&names, ":");
2111 if (isdigit(*name) || *name == '-') {
2112 cr->cr_groups[cr->cr_ngroups++] = atoi(name);
2114 if ((gr = getgrnam(name)) == NULL) {
2115 syslog(LOG_ERR, "unknown group: %s", name);
2118 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid;
2121 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS)
2122 syslog(LOG_ERR, "too many groups");
2125 #define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50)
2127 * Routines that maintain the remote mounttab
2132 struct mountlist *mlp, **mlpp;
2133 char *host, *dirp, *cp;
2137 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) {
2138 if (errno == ENOENT)
2141 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST);
2146 while (fgets(str, STRSIZ, mlfile) != NULL) {
2148 host = strsep(&cp, " \t\n");
2149 dirp = strsep(&cp, " \t\n");
2150 if (host == NULL || dirp == NULL)
2152 mlp = (struct mountlist *)malloc(sizeof (*mlp));
2155 strncpy(mlp->ml_host, host, RPCMNT_NAMELEN);
2156 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
2157 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
2158 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
2159 mlp->ml_next = NULL;
2161 mlpp = &mlp->ml_next;
2167 del_mlist(char *hostp, char *dirp)
2169 struct mountlist *mlp, **mlpp;
2170 struct mountlist *mlp2;
2177 if (!strcmp(mlp->ml_host, hostp) &&
2178 (!dirp || !strcmp(mlp->ml_dirp, dirp))) {
2181 *mlpp = mlp = mlp->ml_next;
2182 free((caddr_t)mlp2);
2184 mlpp = &mlp->ml_next;
2189 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) {
2190 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST);
2195 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
2203 add_mlist(char *hostp, char *dirp)
2205 struct mountlist *mlp, **mlpp;
2211 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp))
2213 mlpp = &mlp->ml_next;
2216 mlp = (struct mountlist *)malloc(sizeof (*mlp));
2219 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN);
2220 mlp->ml_host[RPCMNT_NAMELEN] = '\0';
2221 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN);
2222 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0';
2223 mlp->ml_next = NULL;
2225 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) {
2226 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST);
2229 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp);
2234 * Free up a group list.
2237 free_grp(struct grouplist *grp)
2239 if (grp->gr_type == GT_HOST) {
2240 if (grp->gr_ptr.gt_addrinfo != NULL)
2241 freeaddrinfo(grp->gr_ptr.gt_addrinfo);
2242 } else if (grp->gr_type == GT_NET) {
2243 if (grp->gr_ptr.gt_net.nt_name)
2244 free(grp->gr_ptr.gt_net.nt_name);
2251 SYSLOG(int pri, const char *fmt, ...)
2256 vfprintf(stderr, fmt, ap);
2262 * Check options for consistency.
2265 check_options(struct dirlist *dp)
2270 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL) ||
2271 (opt_flags & (OP_MAPROOT | OP_KERB)) == (OP_MAPROOT | OP_KERB) ||
2272 (opt_flags & (OP_MAPALL | OP_KERB)) == (OP_MAPALL | OP_KERB)) {
2273 syslog(LOG_ERR, "-mapall, -maproot and -kerb mutually exclusive");
2276 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) {
2277 syslog(LOG_ERR, "-mask requires -network");
2280 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) {
2281 syslog(LOG_ERR, "-alldirs has multiple directories");
2288 * Check an absolute directory path for any symbolic links. Return true
2291 check_dirpath(char *dirp)
2298 while (*cp && ret) {
2301 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
2307 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode))
2313 netpartcmp(struct sockaddr *s1, struct sockaddr *s2, int bitlen)
2317 if (s1->sa_family != s2->sa_family)
2320 switch (s1->sa_family) {
2322 src = &((struct sockaddr_in *)s1)->sin_addr;
2323 dst = &((struct sockaddr_in *)s2)->sin_addr;
2324 if (bitlen > sizeof(((struct sockaddr_in *)s1)->sin_addr) * 8)
2328 src = &((struct sockaddr_in6 *)s1)->sin6_addr;
2329 dst = &((struct sockaddr_in6 *)s2)->sin6_addr;
2330 if (((struct sockaddr_in6 *)s1)->sin6_scope_id !=
2331 ((struct sockaddr_in6 *)s2)->sin6_scope_id)
2333 if (bitlen > sizeof(((struct sockaddr_in6 *)s1)->sin6_addr) * 8)
2340 return bitcmp(src, dst, bitlen);
2344 allones(struct sockaddr_storage *ssp, int bitlen)
2347 int bytelen, bitsleft, i;
2350 switch (ssp->ss_family) {
2352 p = (u_int8_t *)&((struct sockaddr_in *)ssp)->sin_addr;
2353 zerolen = sizeof (((struct sockaddr_in *)ssp)->sin_addr);
2356 p = (u_int8_t *)&((struct sockaddr_in6 *)ssp)->sin6_addr;
2357 zerolen = sizeof (((struct sockaddr_in6 *)ssp)->sin6_addr);
2363 memset(p, 0, zerolen);
2365 bytelen = bitlen / 8;
2366 bitsleft = bitlen % 8;
2368 if (bytelen > zerolen)
2371 for (i = 0; i < bytelen; i++)
2374 for (i = 0; i < bitsleft; i++)
2381 countones(struct sockaddr *sa)
2384 int i, bits = 0, bytelen;
2387 switch (sa->sa_family) {
2389 mask = (u_int8_t *)&((struct sockaddr_in *)sa)->sin_addr;
2393 mask = (u_int8_t *)&((struct sockaddr_in6 *)sa)->sin6_addr;
2402 for (i = 0; i < bytelen; i++, p++) {
2404 for (bits = 0; bits < 8; bits++) {
2405 if (!(*p & (1 << (7 - bits))))
2412 return (i * 8 + bits);
2416 sacmp(struct sockaddr *sa1, struct sockaddr *sa2)
2421 if (sa1->sa_family != sa2->sa_family)
2424 switch (sa1->sa_family) {
2426 p1 = &((struct sockaddr_in *)sa1)->sin_addr;
2427 p2 = &((struct sockaddr_in *)sa2)->sin_addr;
2431 p1 = &((struct sockaddr_in6 *)sa1)->sin6_addr;
2432 p2 = &((struct sockaddr_in6 *)sa2)->sin6_addr;
2434 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id !=
2435 ((struct sockaddr_in6 *)sa2)->sin6_scope_id)
2442 return memcmp(p1, p2, len);
2451 void terminate(int sig)
2453 close(mountdlockfd);
2455 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL);
2456 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL);