File: | src/sbin/mountd/mountd.c |
Warning: | line 1483, column 24 The right operand of '==' is a garbage value |
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1 | /* $OpenBSD: mountd.c,v 1.89 2020/08/06 17:57:32 naddy Exp $ */ | |||
2 | /* $NetBSD: mountd.c,v 1.31 1996/02/18 11:57:53 fvdl Exp $ */ | |||
3 | ||||
4 | /* | |||
5 | * Copyright (c) 1989, 1993 | |||
6 | * The Regents of the University of California. All rights reserved. | |||
7 | * | |||
8 | * This code is derived from software contributed to Berkeley by | |||
9 | * Herb Hasler and Rick Macklem at The University of Guelph. | |||
10 | * | |||
11 | * Redistribution and use in source and binary forms, with or without | |||
12 | * modification, are permitted provided that the following conditions | |||
13 | * are met: | |||
14 | * 1. Redistributions of source code must retain the above copyright | |||
15 | * notice, this list of conditions and the following disclaimer. | |||
16 | * 2. Redistributions in binary form must reproduce the above copyright | |||
17 | * notice, this list of conditions and the following disclaimer in the | |||
18 | * documentation and/or other materials provided with the distribution. | |||
19 | * 3. Neither the name of the University nor the names of its contributors | |||
20 | * may be used to endorse or promote products derived from this software | |||
21 | * without specific prior written permission. | |||
22 | * | |||
23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |||
24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||
25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||
26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |||
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||
28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||
29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||
30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||
31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||
32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||
33 | * SUCH DAMAGE. | |||
34 | */ | |||
35 | ||||
36 | #include <sys/types.h> | |||
37 | #include <sys/ioctl.h> | |||
38 | #include <sys/mount.h> | |||
39 | #include <sys/queue.h> | |||
40 | #include <sys/socket.h> | |||
41 | #include <sys/stat.h> | |||
42 | #include <sys/uio.h> | |||
43 | #include <sys/wait.h> | |||
44 | #include <syslog.h> | |||
45 | ||||
46 | #include <rpc/rpc.h> | |||
47 | #include <rpc/pmap_clnt.h> | |||
48 | #include <rpc/pmap_prot.h> | |||
49 | #include <nfs/rpcv2.h> | |||
50 | #include <nfs/nfsproto.h> | |||
51 | ||||
52 | #include <arpa/inet.h> | |||
53 | ||||
54 | #include <ctype.h> | |||
55 | #include <errno(*__errno()).h> | |||
56 | #include <grp.h> | |||
57 | #include <imsg.h> | |||
58 | #include <netdb.h> | |||
59 | #include <netgroup.h> | |||
60 | #include <poll.h> | |||
61 | #include <pwd.h> | |||
62 | #include <signal.h> | |||
63 | #include <stdio.h> | |||
64 | #include <stdlib.h> | |||
65 | #include <string.h> | |||
66 | #include <unistd.h> | |||
67 | #include <limits.h> | |||
68 | #include "pathnames.h" | |||
69 | ||||
70 | #include <stdarg.h> | |||
71 | ||||
72 | #define isterminated(str, size)(memchr((str), '\0', (size)) != ((void *)0)) (memchr((str), '\0', (size)) != NULL((void *)0)) | |||
73 | ||||
74 | /* | |||
75 | * Structures for keeping the mount list and export list | |||
76 | */ | |||
77 | struct mountlist { | |||
78 | struct mountlist *ml_next; | |||
79 | char ml_host[RPCMNT_NAMELEN255+1]; | |||
80 | char ml_dirp[RPCMNT_PATHLEN1024+1]; | |||
81 | }; | |||
82 | ||||
83 | struct dirlist { | |||
84 | struct dirlist *dp_left; | |||
85 | struct dirlist *dp_right; | |||
86 | int dp_flag; | |||
87 | struct hostlist *dp_hosts; /* List of hosts this dir exported to */ | |||
88 | char dp_dirp[1]; /* Actually malloc'd to size of dir */ | |||
89 | }; | |||
90 | /* dp_flag bits */ | |||
91 | #define DP_DEFSET0x1 0x1 | |||
92 | #define DP_HOSTSET0x2 0x2 | |||
93 | ||||
94 | struct exportlist { | |||
95 | struct exportlist *ex_next; | |||
96 | struct dirlist *ex_dirl; | |||
97 | struct dirlist *ex_defdir; | |||
98 | int ex_flag; | |||
99 | fsid_t ex_fs; | |||
100 | char *ex_fsdir; | |||
101 | }; | |||
102 | /* ex_flag bits */ | |||
103 | #define EX_LINKED0x1 0x1 | |||
104 | ||||
105 | struct netmsk { | |||
106 | in_addr_t nt_net; | |||
107 | in_addr_t nt_mask; | |||
108 | char *nt_name; | |||
109 | }; | |||
110 | ||||
111 | union grouptypes { | |||
112 | struct hostent *gt_hostent; | |||
113 | struct netmsk gt_net; | |||
114 | }; | |||
115 | ||||
116 | struct grouplist { | |||
117 | int gr_type; | |||
118 | union grouptypes gr_ptr; | |||
119 | struct grouplist *gr_next; | |||
120 | }; | |||
121 | /* Group types */ | |||
122 | #define GT_NULL0x0 0x0 | |||
123 | #define GT_HOST0x1 0x1 | |||
124 | #define GT_NET0x2 0x2 | |||
125 | #define GT_IGNORE0x5 0x5 | |||
126 | ||||
127 | struct hostlist { | |||
128 | int ht_flag; /* Uses DP_xx bits */ | |||
129 | struct grouplist *ht_grp; | |||
130 | struct hostlist *ht_next; | |||
131 | }; | |||
132 | ||||
133 | struct fhreturn { | |||
134 | int fhr_flag; | |||
135 | int fhr_vers; | |||
136 | nfsfh_t fhr_fh; | |||
137 | }; | |||
138 | ||||
139 | #define IMSG_GETFH_REQ0x0 0x0 | |||
140 | #define IMSG_GETFH_RESP0x1 0x1 | |||
141 | #define IMSG_EXPORT_REQ0x2 0x2 | |||
142 | #define IMSG_EXPORT_RESP0x3 0x3 | |||
143 | #define IMSG_DELEXPORT0x4 0x4 | |||
144 | #define IMSG_MLIST_APPEND0x5 0x5 | |||
145 | #define IMSG_MLIST_OPEN0x6 0x6 | |||
146 | #define IMSG_MLIST_CLOSE0x7 0x7 | |||
147 | #define IMSG_MLIST_WRITE0x8 0x8 | |||
148 | ||||
149 | struct getfh_resp { | |||
150 | fhandle_t gr_fh; | |||
151 | int gr_error; | |||
152 | }; | |||
153 | ||||
154 | struct export_req { | |||
155 | char er_path[MNAMELEN90]; | |||
156 | struct export_args er_args; | |||
157 | struct sockaddr er_addr; | |||
158 | struct sockaddr er_mask; | |||
159 | }; | |||
160 | ||||
161 | /* Global defs */ | |||
162 | char *add_expdir(struct dirlist **, char *, int); | |||
163 | void add_dlist(struct dirlist **, struct dirlist *, struct grouplist *, int); | |||
164 | void add_mlist(char *, char *); | |||
165 | void check_child(int); | |||
166 | int check_dirpath(char *); | |||
167 | int check_options(struct dirlist *); | |||
168 | int chk_host(struct dirlist *, in_addr_t, int *, int *); | |||
169 | void del_mlist(char *, char *); | |||
170 | struct dirlist *dirp_search(struct dirlist *, char *); | |||
171 | int do_mount(struct exportlist *, struct grouplist *, int, struct xucred *, | |||
172 | char *, int); | |||
173 | int do_opt(char **, char **, struct exportlist *, struct grouplist *, | |||
174 | int *, int *, struct xucred *); | |||
175 | struct exportlist *ex_search(fsid_t *); | |||
176 | struct exportlist *get_exp(void); | |||
177 | void free_dir(struct dirlist *); | |||
178 | void free_exp(struct exportlist *); | |||
179 | void free_grp(struct grouplist *); | |||
180 | void free_host(struct hostlist *); | |||
181 | void new_exportlist(int signo); | |||
182 | void get_exportlist(void); | |||
183 | int get_host(char *, struct grouplist *, struct grouplist *); | |||
184 | int get_num(char *); | |||
185 | struct hostlist *get_ht(void); | |||
186 | int get_line(void); | |||
187 | void get_mountlist(void); | |||
188 | int get_net(char *, struct netmsk *, int); | |||
189 | void getexp_err(struct exportlist *, struct grouplist *); | |||
190 | struct grouplist *get_grp(void); | |||
191 | void hang_dirp(struct dirlist *, struct grouplist *, struct exportlist *, | |||
192 | int); | |||
193 | void mntsrv(struct svc_req *, SVCXPRT *); | |||
194 | void nextfield(char **, char **); | |||
195 | void out_of_mem(void); | |||
196 | void parsecred(char *, struct xucred *); | |||
197 | void privchild(int); | |||
198 | int put_exlist(struct dirlist *, XDR *, struct dirlist *, int *); | |||
199 | ssize_t recv_imsg(struct imsg *); | |||
200 | int scan_tree(struct dirlist *, in_addr_t); | |||
201 | int send_imsg(u_int32_t, void *, u_int16_t); | |||
202 | void send_umntall(int signo); | |||
203 | int umntall_each(caddr_t, struct sockaddr_in *); | |||
204 | int xdr_dir(XDR *, char *); | |||
205 | int xdr_explist(XDR *, caddr_t); | |||
206 | int xdr_fhs(XDR *, caddr_t); | |||
207 | int xdr_mlist(XDR *, caddr_t); | |||
208 | void mountd_svc_run(void); | |||
209 | ||||
210 | struct exportlist *exphead; | |||
211 | struct mountlist *mlhead; | |||
212 | struct grouplist *grphead; | |||
213 | const char *exname; | |||
214 | struct xucred def_anon = { | |||
215 | .cr_uid = (uid_t) -2, | |||
216 | .cr_gid = (gid_t) -2, | |||
217 | .cr_ngroups = 0, | |||
218 | .cr_groups = { 0, } | |||
219 | }; | |||
220 | int opt_flags; | |||
221 | /* Bits for above */ | |||
222 | #define OP_MAPROOT0x01 0x01 | |||
223 | #define OP_MAPALL0x02 0x02 | |||
224 | #define OP_MASK0x08 0x08 | |||
225 | #define OP_NET0x10 0x10 | |||
226 | #define OP_ALLDIRS0x40 0x40 | |||
227 | ||||
228 | struct imsgbuf ibuf; | |||
229 | int debug = 0; | |||
230 | ||||
231 | volatile sig_atomic_t gotchld; | |||
232 | volatile sig_atomic_t gothup; | |||
233 | volatile sig_atomic_t gotterm; | |||
234 | ||||
235 | /* | |||
236 | * Mountd server for NFS mount protocol as described in: | |||
237 | * NFS: Network File System Protocol Specification, RFC1094, Appendix A | |||
238 | * The optional arguments are the exports file name | |||
239 | * default: _PATH_EXPORTS | |||
240 | * "-d" to enable debugging | |||
241 | */ | |||
242 | int | |||
243 | main(int argc, char *argv[]) | |||
244 | { | |||
245 | SVCXPRT *udptransp, *tcptransp; | |||
246 | FILE *pidfile; | |||
247 | int c, socks[2]; | |||
248 | ||||
249 | while ((c = getopt(argc, argv, "dnr")) != -1) | |||
250 | switch (c) { | |||
251 | case 'd': | |||
252 | debug = 1; | |||
253 | break; | |||
254 | case 'n': | |||
255 | case 'r': | |||
256 | /* Compatibility */ | |||
257 | break; | |||
258 | default: | |||
259 | fprintf(stderr(&__sF[2]), "usage: mountd [-d] [exportsfile]\n"); | |||
260 | exit(1); | |||
261 | } | |||
262 | argc -= optind; | |||
263 | argv += optind; | |||
264 | grphead = NULL((void *)0); | |||
265 | exphead = NULL((void *)0); | |||
266 | mlhead = NULL((void *)0); | |||
267 | ||||
268 | if (argc == 1) | |||
269 | exname = *argv; | |||
270 | else | |||
271 | exname = _PATH_EXPORTS"/etc/exports"; | |||
272 | ||||
273 | openlog("mountd", LOG_PID0x01, LOG_DAEMON(3<<3)); | |||
274 | if (debug) | |||
275 | fprintf(stderr(&__sF[2]), "Here we go.\n"); | |||
276 | if (debug == 0) { | |||
277 | daemon(0, 0); | |||
278 | signal(SIGINT2, SIG_IGN(void (*)(int))1); | |||
279 | signal(SIGQUIT3, SIG_IGN(void (*)(int))1); | |||
280 | } | |||
281 | /* Store pid in file unless mountd is already running */ | |||
282 | pidfile = fopen(_PATH_MOUNTDPID"/var/run/mountd.pid", "r"); | |||
283 | if (pidfile != NULL((void *)0)) { | |||
284 | if (fscanf(pidfile, "%d\n", &c) > 0 && c > 0) { | |||
285 | if (kill(c, 0) == 0) { | |||
286 | syslog(LOG_ERR3, "Already running (pid %d)", c); | |||
287 | exit(1); | |||
288 | } | |||
289 | } | |||
290 | pidfile = freopen(_PATH_MOUNTDPID"/var/run/mountd.pid", "w", pidfile); | |||
291 | } else { | |||
292 | pidfile = fopen(_PATH_MOUNTDPID"/var/run/mountd.pid", "w"); | |||
293 | } | |||
294 | if (pidfile) { | |||
295 | fprintf(pidfile, "%ld\n", (long)getpid()); | |||
296 | fclose(pidfile); | |||
297 | } | |||
298 | ||||
299 | signal(SIGCHLD20, (void (*)(int)) check_child); | |||
300 | signal(SIGHUP1, (void (*)(int)) new_exportlist); | |||
301 | signal(SIGPIPE13, SIG_IGN(void (*)(int))1); | |||
302 | ||||
303 | if (socketpair(AF_UNIX1, SOCK_STREAM1, PF_UNSPEC0, socks) == -1) { | |||
304 | syslog(LOG_ERR3, "socketpair: %m"); | |||
305 | exit(1); | |||
306 | } | |||
307 | ||||
308 | switch (fork()) { | |||
309 | case -1: | |||
310 | syslog(LOG_ERR3, "fork: %m"); | |||
311 | exit(1); | |||
312 | case 0: | |||
313 | close(socks[0]); | |||
314 | privchild(socks[1]); | |||
315 | } | |||
316 | ||||
317 | close(socks[1]); | |||
318 | ||||
319 | if (pledge("stdio rpath inet dns getpw", NULL((void *)0)) == -1) { | |||
320 | syslog(LOG_ERR3, "pledge: %m"); | |||
321 | exit(1); | |||
322 | } | |||
323 | ||||
324 | signal(SIGTERM15, (void (*)(int)) send_umntall); | |||
325 | imsg_init(&ibuf, socks[0]); | |||
326 | setproctitle("parent"); | |||
327 | ||||
328 | if (debug) | |||
329 | fprintf(stderr(&__sF[2]), "Getting export list.\n"); | |||
330 | get_exportlist(); | |||
331 | if (debug) | |||
332 | fprintf(stderr(&__sF[2]), "Getting mount list.\n"); | |||
333 | get_mountlist(); | |||
334 | ||||
335 | if ((udptransp = svcudp_create(RPC_ANYSOCK-1)) == NULL((void *)0) || | |||
336 | (tcptransp = svctcp_create(RPC_ANYSOCK-1, 0, 0)) == NULL((void *)0)) { | |||
337 | syslog(LOG_ERR3, "Can't create socket"); | |||
338 | exit(1); | |||
339 | } | |||
340 | pmap_unset(RPCPROG_MNT100005, RPCMNT_VER11); | |||
341 | pmap_unset(RPCPROG_MNT100005, RPCMNT_VER33); | |||
342 | if (!svc_register(udptransp, RPCPROG_MNT100005, RPCMNT_VER11, mntsrv, IPPROTO_UDP17) || | |||
343 | !svc_register(udptransp, RPCPROG_MNT100005, RPCMNT_VER33, mntsrv, IPPROTO_UDP17) || | |||
344 | !svc_register(tcptransp, RPCPROG_MNT100005, RPCMNT_VER11, mntsrv, IPPROTO_TCP6) || | |||
345 | !svc_register(tcptransp, RPCPROG_MNT100005, RPCMNT_VER33, mntsrv, IPPROTO_TCP6)) { | |||
346 | syslog(LOG_ERR3, "Can't register mount"); | |||
347 | exit(1); | |||
348 | } | |||
349 | mountd_svc_run(); | |||
350 | syslog(LOG_ERR3, "Mountd died"); | |||
351 | exit(1); | |||
352 | } | |||
353 | ||||
354 | void | |||
355 | check_child(int signo) | |||
356 | { | |||
357 | gotchld = 1; | |||
358 | } | |||
359 | ||||
360 | void | |||
361 | privchild(int sock) | |||
362 | { | |||
363 | struct imsg imsg; | |||
364 | struct pollfd pfd[1]; | |||
365 | struct ufs_args args; | |||
366 | struct statfs sfb; | |||
367 | struct getfh_resp resp; | |||
368 | struct export_req *req; | |||
369 | struct mountlist *ml; | |||
370 | FILE *fp; | |||
371 | char *path; | |||
372 | int error, size; | |||
373 | ||||
374 | imsg_init(&ibuf, sock); | |||
375 | setproctitle("[priv]"); | |||
376 | fp = NULL((void *)0); | |||
377 | ||||
378 | for (;;) { | |||
379 | if (gothup) { | |||
380 | kill(getppid(), SIGHUP1); | |||
381 | gothup = 0; | |||
382 | } | |||
383 | ||||
384 | pfd[0].fd = ibuf.fd; | |||
385 | pfd[0].events = POLLIN0x0001; | |||
386 | switch (poll(pfd, 1, INFTIM(-1))) { | |||
387 | case -1: | |||
388 | if (errno(*__errno()) == EINTR4) | |||
389 | continue; | |||
390 | syslog(LOG_ERR3, "poll: %m"); | |||
391 | _exit(1); | |||
392 | case 0: | |||
393 | continue; | |||
394 | } | |||
395 | if (pfd[0].revents & POLLHUP0x0010) { | |||
396 | syslog(LOG_ERR3, "Socket disconnected"); | |||
397 | _exit(1); | |||
398 | } | |||
399 | if (!(pfd[0].revents & POLLIN0x0001)) | |||
400 | continue; | |||
401 | ||||
402 | switch (imsg_read(&ibuf)) { | |||
403 | case -1: | |||
404 | syslog(LOG_ERR3, "imsg_read: %m"); | |||
405 | _exit(1); | |||
406 | case 0: | |||
407 | syslog(LOG_ERR3, "Socket disconnected"); | |||
408 | _exit(1); | |||
409 | } | |||
410 | ||||
411 | while ((size = imsg_get(&ibuf, &imsg)) != 0) { | |||
412 | if (size == -1) { | |||
413 | syslog(LOG_ERR3, "imsg_get: %m"); | |||
414 | _exit(1); | |||
415 | } | |||
416 | size -= IMSG_HEADER_SIZEsizeof(struct imsg_hdr); | |||
417 | ||||
418 | switch (imsg.hdr.type) { | |||
419 | case IMSG_GETFH_REQ0x0: | |||
420 | if (size != PATH_MAX1024) { | |||
421 | syslog(LOG_ERR3, "Invalid message size"); | |||
422 | break; | |||
423 | } | |||
424 | path = imsg.data; | |||
425 | if (getfh(path, &resp.gr_fh) == -1) | |||
426 | resp.gr_error = errno(*__errno()); | |||
427 | else | |||
428 | resp.gr_error = 0; | |||
429 | send_imsg(IMSG_GETFH_RESP0x1, &resp, sizeof(resp)); | |||
430 | break; | |||
431 | case IMSG_EXPORT_REQ0x2: | |||
432 | if (size != sizeof(*req)) { | |||
433 | syslog(LOG_ERR3, "Invalid message size"); | |||
434 | break; | |||
435 | } | |||
436 | req = imsg.data; | |||
437 | if (statfs(req->er_path, &sfb) == -1) { | |||
438 | error = errno(*__errno()); | |||
439 | syslog(LOG_ERR3, "statfs: %m"); | |||
440 | send_imsg(IMSG_EXPORT_RESP0x3, &error, | |||
441 | sizeof(error)); | |||
442 | break; | |||
443 | } | |||
444 | args.fspec = 0; | |||
445 | args.export_info = req->er_args; | |||
446 | args.export_info.ex_addr = &req->er_addr; | |||
447 | args.export_info.ex_mask = &req->er_mask; | |||
448 | if (mount(sfb.f_fstypename, sfb.f_mntonname, | |||
449 | sfb.f_flags | MNT_UPDATE0x00010000, &args) == -1) { | |||
450 | error = errno(*__errno()); | |||
451 | syslog(LOG_ERR3, "mount: %m"); | |||
452 | send_imsg(IMSG_EXPORT_RESP0x3, &error, | |||
453 | sizeof(error)); | |||
454 | break; | |||
455 | } | |||
456 | error = 0; | |||
457 | send_imsg(IMSG_EXPORT_RESP0x3, &error, sizeof(error)); | |||
458 | break; | |||
459 | case IMSG_DELEXPORT0x4: | |||
460 | if (size != MNAMELEN90) { | |||
461 | syslog(LOG_ERR3, "Invalid message size"); | |||
462 | break; | |||
463 | } | |||
464 | path = imsg.data; | |||
465 | if (statfs(path, &sfb) == -1) { | |||
466 | syslog(LOG_ERR3, "statfs: %m"); | |||
467 | break; | |||
468 | } | |||
469 | memset(&args, 0, sizeof(args)); | |||
470 | args.export_info.ex_flags = MNT_DELEXPORT0x00020000; | |||
471 | if (mount(sfb.f_fstypename, sfb.f_mntonname, | |||
472 | sfb.f_flags | MNT_UPDATE0x00010000, &args) == -1) | |||
473 | syslog(LOG_ERR3, "mount: %m"); | |||
474 | break; | |||
475 | case IMSG_MLIST_APPEND0x5: | |||
476 | if (size != sizeof(*ml)) { | |||
477 | syslog(LOG_ERR3, "Invalid message size"); | |||
478 | break; | |||
479 | } | |||
480 | if (fp != NULL((void *)0)) | |||
481 | break; | |||
482 | ml = imsg.data; | |||
483 | if (!isterminated(&ml->ml_host,(memchr((&ml->ml_host), '\0', (sizeof(ml->ml_host)) ) != ((void *)0)) | |||
484 | sizeof(ml->ml_host))(memchr((&ml->ml_host), '\0', (sizeof(ml->ml_host)) ) != ((void *)0)) || | |||
485 | !isterminated(&ml->ml_dirp,(memchr((&ml->ml_dirp), '\0', (sizeof(ml->ml_dirp)) ) != ((void *)0)) | |||
486 | sizeof(ml->ml_dirp))(memchr((&ml->ml_dirp), '\0', (sizeof(ml->ml_dirp)) ) != ((void *)0))) | |||
487 | break; | |||
488 | fp = fopen(_PATH_RMOUNTLIST"/var/db/mountdtab", "a"); | |||
489 | if (fp == NULL((void *)0)) { | |||
490 | syslog(LOG_ERR3, "fopen: %s: %m", | |||
491 | _PATH_RMOUNTLIST"/var/db/mountdtab"); | |||
492 | break; | |||
493 | } | |||
494 | fprintf(fp, "%s %s\n", ml->ml_host, | |||
495 | ml->ml_dirp); | |||
496 | fclose(fp); | |||
497 | fp = NULL((void *)0); | |||
498 | break; | |||
499 | case IMSG_MLIST_OPEN0x6: | |||
500 | if (size != 0) { | |||
501 | syslog(LOG_ERR3, "Invalid message size"); | |||
502 | break; | |||
503 | } | |||
504 | if (fp != NULL((void *)0)) | |||
505 | break; | |||
506 | fp = fopen(_PATH_RMOUNTLIST"/var/db/mountdtab", "w"); | |||
507 | if (fp == NULL((void *)0)) | |||
508 | syslog(LOG_ERR3, "fopen: %s: %m", | |||
509 | _PATH_RMOUNTLIST"/var/db/mountdtab"); | |||
510 | break; | |||
511 | case IMSG_MLIST_WRITE0x8: | |||
512 | if (size != sizeof(*ml)) { | |||
513 | syslog(LOG_ERR3, "Invalid message size"); | |||
514 | break; | |||
515 | } | |||
516 | if (fp == NULL((void *)0)) | |||
517 | break; | |||
518 | ml = imsg.data; | |||
519 | if (!isterminated(&ml->ml_host,(memchr((&ml->ml_host), '\0', (sizeof(ml->ml_host)) ) != ((void *)0)) | |||
520 | sizeof(ml->ml_host))(memchr((&ml->ml_host), '\0', (sizeof(ml->ml_host)) ) != ((void *)0)) || | |||
521 | !isterminated(&ml->ml_dirp,(memchr((&ml->ml_dirp), '\0', (sizeof(ml->ml_host)) ) != ((void *)0)) | |||
522 | sizeof(ml->ml_host))(memchr((&ml->ml_dirp), '\0', (sizeof(ml->ml_host)) ) != ((void *)0))) | |||
523 | break; | |||
524 | fprintf(fp, "%s %s\n", ml->ml_host, | |||
525 | ml->ml_dirp); | |||
526 | break; | |||
527 | case IMSG_MLIST_CLOSE0x7: | |||
528 | if (size != 0) { | |||
529 | syslog(LOG_ERR3, "Invalid message size"); | |||
530 | break; | |||
531 | } | |||
532 | if (fp != NULL((void *)0)) { | |||
533 | fclose(fp); | |||
534 | fp = NULL((void *)0); | |||
535 | } | |||
536 | break; | |||
537 | default: | |||
538 | syslog(LOG_ERR3, "Unexpected message type"); | |||
539 | break; | |||
540 | } | |||
541 | ||||
542 | imsg_free(&imsg); | |||
543 | } | |||
544 | } | |||
545 | } | |||
546 | ||||
547 | int | |||
548 | imsg_getfh(char *path, fhandle_t *fh) | |||
549 | { | |||
550 | struct imsg imsg; | |||
551 | struct getfh_resp *resp; | |||
552 | ssize_t size; | |||
553 | ||||
554 | if (send_imsg(IMSG_GETFH_REQ0x0, path, PATH_MAX1024) == -1) | |||
555 | return (-1); | |||
556 | ||||
557 | size = recv_imsg(&imsg); | |||
558 | if (size == -1) | |||
559 | return (-1); | |||
560 | if (imsg.hdr.type != IMSG_GETFH_RESP0x1 || size != sizeof(*resp)) { | |||
561 | syslog(LOG_ERR3, "Invalid message"); | |||
562 | imsg_free(&imsg); | |||
563 | errno(*__errno()) = EINVAL22; | |||
564 | return (-1); | |||
565 | } | |||
566 | ||||
567 | resp = imsg.data; | |||
568 | *fh = resp->gr_fh; | |||
569 | if (resp->gr_error) { | |||
570 | errno(*__errno()) = resp->gr_error; | |||
571 | imsg_free(&imsg); | |||
572 | return (-1); | |||
573 | } | |||
574 | ||||
575 | imsg_free(&imsg); | |||
576 | return (0); | |||
577 | } | |||
578 | ||||
579 | int | |||
580 | imsg_export(const char *dir, struct export_args *args) | |||
581 | { | |||
582 | struct export_req req; | |||
583 | struct imsg imsg; | |||
584 | ssize_t size; | |||
585 | ||||
586 | if (strlcpy(req.er_path, dir, sizeof(req.er_path)) >= | |||
587 | sizeof(req.er_path)) { | |||
588 | syslog(LOG_ERR3, "%s: mount dir too long", dir); | |||
589 | errno(*__errno()) = EINVAL22; | |||
590 | return (-1); | |||
591 | } | |||
592 | ||||
593 | req.er_args = *args; | |||
594 | if (args->ex_addrlen) | |||
595 | req.er_addr = *args->ex_addr; | |||
596 | if (args->ex_masklen) | |||
597 | req.er_mask = *args->ex_mask; | |||
598 | ||||
599 | if (send_imsg(IMSG_EXPORT_REQ0x2, &req, sizeof(req)) == -1) | |||
600 | return (-1); | |||
601 | ||||
602 | size = recv_imsg(&imsg); | |||
603 | if (size == -1) | |||
604 | return (-1); | |||
605 | if (imsg.hdr.type != IMSG_EXPORT_RESP0x3 || size != sizeof(int)) { | |||
606 | syslog(LOG_ERR3, "Invalid message"); | |||
607 | imsg_free(&imsg); | |||
608 | errno(*__errno()) = EINVAL22; | |||
609 | return (-1); | |||
610 | } | |||
611 | ||||
612 | if (*(int *)imsg.data != 0) { | |||
613 | errno(*__errno()) = *(int *)imsg.data; | |||
614 | imsg_free(&imsg); | |||
615 | return (-1); | |||
616 | } | |||
617 | ||||
618 | imsg_free(&imsg); | |||
619 | return (0); | |||
620 | } | |||
621 | ||||
622 | ssize_t | |||
623 | recv_imsg(struct imsg *imsg) | |||
624 | { | |||
625 | ssize_t n; | |||
626 | ||||
627 | n = imsg_read(&ibuf); | |||
628 | if (n == -1) { | |||
629 | syslog(LOG_ERR3, "imsg_read: %m"); | |||
630 | return (-1); | |||
631 | } | |||
632 | if (n == 0) { | |||
633 | syslog(LOG_ERR3, "Socket disconnected"); | |||
634 | errno(*__errno()) = EINVAL22; | |||
635 | return (-1); | |||
636 | } | |||
637 | ||||
638 | n = imsg_get(&ibuf, imsg); | |||
639 | if (n == -1) { | |||
640 | syslog(LOG_ERR3, "imsg_get: %m"); | |||
641 | return (-1); | |||
642 | } | |||
643 | if (n == 0) { | |||
644 | syslog(LOG_ERR3, "No messages ready"); | |||
645 | errno(*__errno()) = EINVAL22; | |||
646 | return (-1); | |||
647 | } | |||
648 | ||||
649 | return (n - IMSG_HEADER_SIZEsizeof(struct imsg_hdr)); | |||
650 | } | |||
651 | ||||
652 | int | |||
653 | send_imsg(u_int32_t type, void *data, u_int16_t size) | |||
654 | { | |||
655 | if (imsg_compose(&ibuf, type, 0, 0, -1, data, size) == -1) { | |||
656 | syslog(LOG_ERR3, "imsg_compose: %m"); | |||
657 | return (-1); | |||
658 | } | |||
659 | ||||
660 | if (imsg_flush(&ibuf) == -1) { | |||
661 | syslog(LOG_ERR3, "imsg_flush: %m"); | |||
662 | return (-1); | |||
663 | } | |||
664 | ||||
665 | return (0); | |||
666 | } | |||
667 | ||||
668 | void | |||
669 | mountd_svc_run(void) | |||
670 | { | |||
671 | struct pollfd *pfd = NULL((void *)0), *newp; | |||
672 | nfds_t saved_max_pollfd = 0; | |||
673 | int nready, status; | |||
674 | ||||
675 | for (;;) { | |||
676 | if (gotchld) { | |||
677 | if (waitpid(WAIT_ANY(-1), &status, WNOHANG1) == -1) { | |||
678 | syslog(LOG_ERR3, "waitpid: %m"); | |||
679 | break; | |||
680 | } | |||
681 | if (WIFEXITED(status)(((status) & 0177) == 0)) { | |||
682 | syslog(LOG_ERR3, "Child exited"); | |||
683 | break; | |||
684 | } | |||
685 | if (WIFSIGNALED(status)(((status) & 0177) != 0177 && ((status) & 0177 ) != 0)) { | |||
686 | syslog(LOG_ERR3, "Child terminated by signal"); | |||
687 | break; | |||
688 | } | |||
689 | gotchld = 0; | |||
690 | } | |||
691 | if (gothup) { | |||
692 | get_exportlist(); | |||
693 | gothup = 0; | |||
694 | } | |||
695 | if (gotterm) | |||
696 | break; | |||
697 | if (svc_max_pollfd > saved_max_pollfd) { | |||
698 | newp = reallocarray(pfd, svc_max_pollfd, sizeof(*pfd)); | |||
699 | if (!newp) { | |||
700 | free(pfd); | |||
701 | perror("mountd_svc_run: - realloc failed"); | |||
702 | return; | |||
703 | } | |||
704 | pfd = newp; | |||
705 | saved_max_pollfd = svc_max_pollfd; | |||
706 | } | |||
707 | memcpy(pfd, svc_pollfd, svc_max_pollfd * sizeof(*pfd)); | |||
708 | ||||
709 | nready = poll(pfd, svc_max_pollfd, INFTIM(-1)); | |||
710 | switch (nready) { | |||
711 | case -1: | |||
712 | if (errno(*__errno()) == EINTR4) | |||
713 | break; | |||
714 | perror("mountd_svc_run: - poll failed"); | |||
715 | free(pfd); | |||
716 | return; | |||
717 | case 0: | |||
718 | break; | |||
719 | default: | |||
720 | svc_getreq_poll(pfd, nready); | |||
721 | break; | |||
722 | } | |||
723 | } | |||
724 | ||||
725 | (void) clnt_broadcast(RPCPROG_MNT100005, RPCMNT_VER11, RPCMNT_UMNTALL4, | |||
726 | xdr_void, (caddr_t)0, xdr_void, (caddr_t)0, umntall_each); | |||
727 | exit(0); | |||
728 | } | |||
729 | ||||
730 | /* | |||
731 | * The mount rpc service | |||
732 | */ | |||
733 | void | |||
734 | mntsrv(struct svc_req *rqstp, SVCXPRT *transp) | |||
735 | { | |||
736 | char rpcpath[RPCMNT_PATHLEN1024+1], dirpath[PATH_MAX1024]; | |||
737 | struct hostent *hp = NULL((void *)0); | |||
738 | struct exportlist *ep; | |||
739 | sigset_t sighup_mask; | |||
740 | int defset, hostset; | |||
741 | struct fhreturn fhr; | |||
742 | struct dirlist *dp; | |||
743 | struct statfs fsb; | |||
744 | struct stat stb; | |||
745 | in_addr_t saddr; | |||
746 | u_short sport; | |||
747 | long bad = 0; | |||
748 | ||||
749 | sigemptyset(&sighup_mask); | |||
750 | sigaddset(&sighup_mask, SIGHUP1); | |||
751 | saddr = transp->xp_raddr.sin_addr.s_addr; | |||
752 | sport = ntohs(transp->xp_raddr.sin_port)(__uint16_t)(__builtin_constant_p(transp->xp_raddr.sin_port ) ? (__uint16_t)(((__uint16_t)(transp->xp_raddr.sin_port) & 0xffU) << 8 | ((__uint16_t)(transp->xp_raddr.sin_port ) & 0xff00U) >> 8) : __swap16md(transp->xp_raddr .sin_port)); | |||
| ||||
753 | switch (rqstp->rq_proc) { | |||
754 | case NULLPROC((unsigned int)0): | |||
755 | if (!svc_sendreply(transp, xdr_void, NULL((void *)0))) | |||
756 | syslog(LOG_ERR3, "Can't send reply"); | |||
757 | return; | |||
758 | case RPCMNT_MOUNT1: | |||
759 | if (debug) | |||
760 | fprintf(stderr(&__sF[2]), "Got mount request from %s\n", | |||
761 | inet_ntoa(transp->xp_raddr.sin_addr)); | |||
762 | if (sport >= IPPORT_RESERVED1024) { | |||
763 | syslog(LOG_NOTICE5, | |||
764 | "Refused mount RPC from host %s port %d", | |||
765 | inet_ntoa(transp->xp_raddr.sin_addr), sport); | |||
766 | svcerr_weakauth(transp); | |||
767 | return; | |||
768 | } | |||
769 | if (!svc_getargs(transp, xdr_dir, rpcpath)(*(transp)->xp_ops->xp_getargs)((transp), (xdr_dir), (rpcpath ))) { | |||
770 | svcerr_decode(transp); | |||
771 | return; | |||
772 | } | |||
773 | if (debug) | |||
774 | fprintf(stderr(&__sF[2]), "rpcpath: %s\n", rpcpath); | |||
775 | ||||
776 | /* | |||
777 | * Get the real pathname and make sure it is a file or | |||
778 | * directory that exists. | |||
779 | */ | |||
780 | if (realpath(rpcpath, dirpath) == NULL((void *)0)) { | |||
781 | bad = errno(*__errno()); | |||
782 | if (debug) | |||
783 | fprintf(stderr(&__sF[2]), "realpath failed on %s\n", | |||
784 | rpcpath); | |||
785 | strlcpy(dirpath, rpcpath, sizeof(dirpath)); | |||
786 | } else if (stat(dirpath, &stb) == -1 || | |||
787 | (!S_ISDIR(stb.st_mode)((stb.st_mode & 0170000) == 0040000) && !S_ISREG(stb.st_mode)((stb.st_mode & 0170000) == 0100000)) || | |||
788 | statfs(dirpath, &fsb) == -1) { | |||
789 | if (debug
| |||
790 | fprintf(stderr(&__sF[2]), "stat failed on %s\n", dirpath); | |||
791 | bad = ENOENT2; /* We will send error reply later */ | |||
792 | } | |||
793 | ||||
794 | /* Check in the exports list */ | |||
795 | sigprocmask(SIG_BLOCK1, &sighup_mask, NULL((void *)0)); | |||
796 | ep = ex_search(&fsb.f_fsid); | |||
797 | hostset = defset = 0; | |||
798 | if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset) || | |||
799 | ((dp = dirp_search(ep->ex_dirl, dirpath)) && | |||
800 | chk_host(dp, saddr, &defset, &hostset)) || | |||
801 | (defset && scan_tree(ep->ex_defdir, saddr) == 0 && | |||
802 | scan_tree(ep->ex_dirl, saddr) == 0))) { | |||
803 | if (bad) { | |||
804 | if (!svc_sendreply(transp, xdr_long, | |||
805 | (caddr_t)&bad)) | |||
806 | syslog(LOG_ERR3, "Can't send reply"); | |||
807 | sigprocmask(SIG_UNBLOCK2, &sighup_mask, NULL((void *)0)); | |||
808 | return; | |||
809 | } | |||
810 | if (hostset & DP_HOSTSET0x2) | |||
811 | fhr.fhr_flag = hostset; | |||
812 | else | |||
813 | fhr.fhr_flag = defset; | |||
814 | fhr.fhr_vers = rqstp->rq_vers; | |||
815 | /* Get the file handle */ | |||
816 | memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t)); | |||
817 | if (imsg_getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) { | |||
818 | bad = errno(*__errno()); | |||
819 | syslog(LOG_ERR3, "Can't get fh for %s", dirpath); | |||
820 | if (!svc_sendreply(transp, xdr_long, | |||
821 | (caddr_t)&bad)) | |||
822 | syslog(LOG_ERR3, "Can't send reply"); | |||
823 | sigprocmask(SIG_UNBLOCK2, &sighup_mask, NULL((void *)0)); | |||
824 | return; | |||
825 | } | |||
826 | if (!svc_sendreply(transp, xdr_fhs, (caddr_t)&fhr)) | |||
827 | syslog(LOG_ERR3, "Can't send reply"); | |||
828 | if (hp == NULL((void *)0)) | |||
829 | hp = gethostbyaddr((caddr_t)&saddr, | |||
830 | sizeof(saddr), AF_INET2); | |||
831 | if (hp) | |||
832 | add_mlist(hp->h_name, dirpath); | |||
833 | else | |||
834 | add_mlist(inet_ntoa(transp->xp_raddr.sin_addr), | |||
835 | dirpath); | |||
836 | if (debug) { | |||
837 | fprintf(stderr(&__sF[2]), | |||
838 | "Mount successful for %s by %s.\n", | |||
839 | dirpath, | |||
840 | inet_ntoa(transp->xp_raddr.sin_addr)); | |||
841 | } | |||
842 | } else | |||
843 | bad = EACCES13; | |||
844 | ||||
845 | if (bad && !svc_sendreply(transp, xdr_long, (caddr_t)&bad)) | |||
846 | syslog(LOG_ERR3, "Can't send reply"); | |||
847 | sigprocmask(SIG_UNBLOCK2, &sighup_mask, NULL((void *)0)); | |||
848 | return; | |||
849 | case RPCMNT_DUMP2: | |||
850 | if (!svc_sendreply(transp, xdr_mlist, NULL((void *)0))) | |||
851 | syslog(LOG_ERR3, "Can't send reply"); | |||
852 | return; | |||
853 | case RPCMNT_UMOUNT3: | |||
854 | if (sport >= IPPORT_RESERVED1024) { | |||
855 | svcerr_weakauth(transp); | |||
856 | return; | |||
857 | } | |||
858 | if (!svc_getargs(transp, xdr_dir, dirpath)(*(transp)->xp_ops->xp_getargs)((transp), (xdr_dir), (dirpath ))) { | |||
859 | svcerr_decode(transp); | |||
860 | return; | |||
861 | } | |||
862 | if (!svc_sendreply(transp, xdr_void, NULL((void *)0))) | |||
863 | syslog(LOG_ERR3, "Can't send reply"); | |||
864 | hp = gethostbyaddr((caddr_t)&saddr, sizeof(saddr), AF_INET2); | |||
865 | if (hp) | |||
866 | del_mlist(hp->h_name, dirpath); | |||
867 | del_mlist(inet_ntoa(transp->xp_raddr.sin_addr), dirpath); | |||
868 | return; | |||
869 | case RPCMNT_UMNTALL4: | |||
870 | if (sport >= IPPORT_RESERVED1024) { | |||
871 | svcerr_weakauth(transp); | |||
872 | return; | |||
873 | } | |||
874 | if (!svc_sendreply(transp, xdr_void, NULL((void *)0))) | |||
875 | syslog(LOG_ERR3, "Can't send reply"); | |||
876 | hp = gethostbyaddr((caddr_t)&saddr, sizeof(saddr), AF_INET2); | |||
877 | if (hp) | |||
878 | del_mlist(hp->h_name, NULL((void *)0)); | |||
879 | del_mlist(inet_ntoa(transp->xp_raddr.sin_addr), NULL((void *)0)); | |||
880 | return; | |||
881 | case RPCMNT_EXPORT5: | |||
882 | if (!svc_sendreply(transp, xdr_explist, NULL((void *)0))) | |||
883 | syslog(LOG_ERR3, "Can't send reply"); | |||
884 | return; | |||
885 | default: | |||
886 | svcerr_noproc(transp); | |||
887 | return; | |||
888 | } | |||
889 | } | |||
890 | ||||
891 | /* | |||
892 | * Xdr conversion for a dirpath string | |||
893 | */ | |||
894 | int | |||
895 | xdr_dir(XDR *xdrsp, char *dirp) | |||
896 | { | |||
897 | return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN1024)); | |||
898 | } | |||
899 | ||||
900 | /* | |||
901 | * Xdr routine to generate file handle reply | |||
902 | */ | |||
903 | int | |||
904 | xdr_fhs(XDR *xdrsp, caddr_t cp) | |||
905 | { | |||
906 | struct fhreturn *fhrp = (struct fhreturn *)cp; | |||
907 | long ok = 0, len, auth; | |||
908 | ||||
909 | if (!xdr_long(xdrsp, &ok)) | |||
910 | return (0); | |||
911 | switch (fhrp->fhr_vers) { | |||
912 | case 1: | |||
913 | return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH32)); | |||
914 | case 3: | |||
915 | len = NFSX_V3FH(sizeof (fhandle_t)); | |||
916 | if (!xdr_long(xdrsp, &len)) | |||
917 | return (0); | |||
918 | if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len)) | |||
919 | return (0); | |||
920 | auth = RPCAUTH_UNIX1; | |||
921 | len = 1; | |||
922 | if (!xdr_long(xdrsp, &len)) | |||
923 | return (0); | |||
924 | return (xdr_long(xdrsp, &auth)); | |||
925 | } | |||
926 | return (0); | |||
927 | } | |||
928 | ||||
929 | int | |||
930 | xdr_mlist(XDR *xdrsp, caddr_t cp) | |||
931 | { | |||
932 | int true = 1, false = 0; | |||
933 | struct mountlist *mlp; | |||
934 | char *strp; | |||
935 | ||||
936 | mlp = mlhead; | |||
937 | while (mlp) { | |||
938 | if (!xdr_bool(xdrsp, &true)) | |||
939 | return (0); | |||
940 | strp = &mlp->ml_host[0]; | |||
941 | if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN255)) | |||
942 | return (0); | |||
943 | strp = &mlp->ml_dirp[0]; | |||
944 | if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN1024)) | |||
945 | return (0); | |||
946 | mlp = mlp->ml_next; | |||
947 | } | |||
948 | if (!xdr_bool(xdrsp, &false)) | |||
949 | return (0); | |||
950 | return (1); | |||
951 | } | |||
952 | ||||
953 | /* | |||
954 | * Xdr conversion for export list | |||
955 | */ | |||
956 | int | |||
957 | xdr_explist(XDR *xdrsp, caddr_t cp) | |||
958 | { | |||
959 | struct exportlist *ep; | |||
960 | int false = 0, putdef; | |||
961 | sigset_t sighup_mask; | |||
962 | ||||
963 | sigemptyset(&sighup_mask); | |||
964 | sigaddset(&sighup_mask, SIGHUP1); | |||
965 | sigprocmask(SIG_BLOCK1, &sighup_mask, NULL((void *)0)); | |||
966 | ep = exphead; | |||
967 | while (ep) { | |||
968 | putdef = 0; | |||
969 | if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, &putdef)) | |||
970 | goto errout; | |||
971 | if (ep->ex_defdir && putdef == 0 && put_exlist(ep->ex_defdir, | |||
972 | xdrsp, NULL((void *)0), &putdef)) | |||
973 | goto errout; | |||
974 | ep = ep->ex_next; | |||
975 | } | |||
976 | sigprocmask(SIG_UNBLOCK2, &sighup_mask, NULL((void *)0)); | |||
977 | if (!xdr_bool(xdrsp, &false)) | |||
978 | return (0); | |||
979 | return (1); | |||
980 | errout: | |||
981 | sigprocmask(SIG_UNBLOCK2, &sighup_mask, NULL((void *)0)); | |||
982 | return (0); | |||
983 | } | |||
984 | ||||
985 | /* | |||
986 | * Called from xdr_explist() to traverse the tree and export the | |||
987 | * directory paths. | |||
988 | */ | |||
989 | int | |||
990 | put_exlist(struct dirlist *dp, XDR *xdrsp, struct dirlist *adp, | |||
991 | int *putdefp) | |||
992 | { | |||
993 | int true = 1, false = 0, gotalldir = 0; | |||
994 | struct grouplist *grp; | |||
995 | struct hostlist *hp; | |||
996 | char *strp; | |||
997 | ||||
998 | if (dp) { | |||
999 | if (put_exlist(dp->dp_left, xdrsp, adp, putdefp)) | |||
1000 | return (1); | |||
1001 | if (!xdr_bool(xdrsp, &true)) | |||
1002 | return (1); | |||
1003 | strp = dp->dp_dirp; | |||
1004 | if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN1024)) | |||
1005 | return (1); | |||
1006 | if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) { | |||
1007 | gotalldir = 1; | |||
1008 | *putdefp = 1; | |||
1009 | } | |||
1010 | if ((dp->dp_flag & DP_DEFSET0x1) == 0 && | |||
1011 | (gotalldir == 0 || (adp->dp_flag & DP_DEFSET0x1) == 0)) { | |||
1012 | hp = dp->dp_hosts; | |||
1013 | while (hp) { | |||
1014 | grp = hp->ht_grp; | |||
1015 | if (grp->gr_type == GT_HOST0x1) { | |||
1016 | if (!xdr_bool(xdrsp, &true)) | |||
1017 | return (1); | |||
1018 | strp = grp->gr_ptr.gt_hostent->h_name; | |||
1019 | if (!xdr_string(xdrsp, &strp, | |||
1020 | RPCMNT_NAMELEN255)) | |||
1021 | return (1); | |||
1022 | } else if (grp->gr_type == GT_NET0x2) { | |||
1023 | if (!xdr_bool(xdrsp, &true)) | |||
1024 | return (1); | |||
1025 | strp = grp->gr_ptr.gt_net.nt_name; | |||
1026 | if (!xdr_string(xdrsp, &strp, | |||
1027 | RPCMNT_NAMELEN255)) | |||
1028 | return (1); | |||
1029 | } | |||
1030 | hp = hp->ht_next; | |||
1031 | if (gotalldir && hp == NULL((void *)0)) { | |||
1032 | hp = adp->dp_hosts; | |||
1033 | gotalldir = 0; | |||
1034 | } | |||
1035 | } | |||
1036 | } | |||
1037 | if (!xdr_bool(xdrsp, &false)) | |||
1038 | return (1); | |||
1039 | if (put_exlist(dp->dp_right, xdrsp, adp, putdefp)) | |||
1040 | return (1); | |||
1041 | } | |||
1042 | return (0); | |||
1043 | } | |||
1044 | ||||
1045 | #define LINESIZ10240 10240 | |||
1046 | char line[LINESIZ10240]; | |||
1047 | FILE *exp_file; | |||
1048 | ||||
1049 | void | |||
1050 | new_exportlist(int signo) | |||
1051 | { | |||
1052 | gothup = 1; | |||
1053 | ||||
1054 | } | |||
1055 | ||||
1056 | /* | |||
1057 | * Get the export list | |||
1058 | */ | |||
1059 | void | |||
1060 | get_exportlist(void) | |||
1061 | { | |||
1062 | int len, has_host, exflags, got_nondir, dirplen = 0, num; | |||
1063 | int lookup_failed, num_hosts, i, netgrp; | |||
1064 | char *cp, *endcp, *dirp = NULL((void *)0), *hst, *usr, *dom, savedc; | |||
1065 | struct exportlist *ep, *ep2; | |||
1066 | struct grouplist *grp, *tgrp; | |||
1067 | struct exportlist **epp; | |||
1068 | struct dirlist *dirhead; | |||
1069 | struct statfs fsb, *ofsp, *fsp; | |||
1070 | struct hostent *hpe; | |||
1071 | struct xucred anon; | |||
1072 | struct fsarray { | |||
1073 | int exflags; | |||
1074 | char *mntonname; | |||
1075 | } *fstbl; | |||
1076 | ||||
1077 | /* | |||
1078 | * First, get rid of the old list | |||
1079 | */ | |||
1080 | ep = exphead; | |||
1081 | while (ep) { | |||
1082 | ep2 = ep; | |||
1083 | ep = ep->ex_next; | |||
1084 | free_exp(ep2); | |||
1085 | } | |||
1086 | exphead = NULL((void *)0); | |||
1087 | ||||
1088 | grp = grphead; | |||
1089 | while (grp) { | |||
1090 | tgrp = grp; | |||
1091 | grp = grp->gr_next; | |||
1092 | free_grp(tgrp); | |||
1093 | } | |||
1094 | grphead = NULL((void *)0); | |||
1095 | ||||
1096 | /* | |||
1097 | * And delete exports that are in the kernel for all local | |||
1098 | * file systems. | |||
1099 | * XXX: Should know how to handle all local exportable file systems | |||
1100 | * instead of just MOUNT_FFS. | |||
1101 | */ | |||
1102 | num = getmntinfo(&ofsp, MNT_NOWAIT2); | |||
1103 | if (num == 0 && errno(*__errno())) | |||
1104 | syslog(LOG_ERR3, "getmntinfo: %s", strerror(errno(*__errno()))); | |||
1105 | ||||
1106 | fsp = ofsp; | |||
1107 | ||||
1108 | fstbl = calloc(num, sizeof (fstbl[0])); | |||
1109 | if (fstbl == NULL((void *)0)) | |||
1110 | out_of_mem(); | |||
1111 | ||||
1112 | for (i = 0; i < num; i++) { | |||
1113 | ||||
1114 | if (!strncmp(fsp->f_fstypename, MOUNT_MFS"mfs", MFSNAMELEN16) || | |||
1115 | !strncmp(fsp->f_fstypename, MOUNT_FFS"ffs", MFSNAMELEN16) || | |||
1116 | !strncmp(fsp->f_fstypename, MOUNT_EXT2FS"ext2fs", MFSNAMELEN16) || | |||
1117 | !strncmp(fsp->f_fstypename, MOUNT_MSDOS"msdos", MFSNAMELEN16) || | |||
1118 | !strncmp(fsp->f_fstypename, MOUNT_CD9660"cd9660", MFSNAMELEN16)) { | |||
1119 | fstbl[i].exflags = MNT_DELEXPORT0x00020000; | |||
1120 | fstbl[i].mntonname = fsp->f_mntonname; | |||
1121 | } | |||
1122 | fsp++; | |||
1123 | } | |||
1124 | ||||
1125 | /* | |||
1126 | * Read in the exports file and build the list, calling mount() through | |||
1127 | * the privileged child as we go along to push the export rules into | |||
1128 | * the kernel. | |||
1129 | */ | |||
1130 | if ((exp_file = fopen(exname, "r")) == NULL((void *)0)) { | |||
1131 | syslog(LOG_ERR3, "Can't open %s", exname); | |||
1132 | exit(2); | |||
1133 | } | |||
1134 | dirhead = NULL((void *)0); | |||
1135 | while (get_line()) { | |||
1136 | if (debug) | |||
1137 | fprintf(stderr(&__sF[2]), "Got line %s\n",line); | |||
1138 | cp = line; | |||
1139 | nextfield(&cp, &endcp); | |||
1140 | if (*cp == '#') | |||
1141 | goto nextline; | |||
1142 | ||||
1143 | /* | |||
1144 | * Set defaults. | |||
1145 | */ | |||
1146 | has_host = FALSE(0); | |||
1147 | num_hosts = 0; | |||
1148 | lookup_failed = FALSE(0); | |||
1149 | anon = def_anon; | |||
1150 | exflags = MNT_EXPORTED0x00000100; | |||
1151 | got_nondir = 0; | |||
1152 | opt_flags = 0; | |||
1153 | ep = NULL((void *)0); | |||
1154 | ||||
1155 | /* | |||
1156 | * Create new exports list entry | |||
1157 | */ | |||
1158 | len = endcp-cp; | |||
1159 | tgrp = grp = get_grp(); | |||
1160 | while (len > 0) { | |||
1161 | if (len > RPCMNT_NAMELEN255) { | |||
1162 | getexp_err(ep, tgrp); | |||
1163 | goto nextline; | |||
1164 | } | |||
1165 | if (*cp == '-') { | |||
1166 | if (ep == NULL((void *)0)) { | |||
1167 | getexp_err(ep, tgrp); | |||
1168 | goto nextline; | |||
1169 | } | |||
1170 | if (debug) | |||
1171 | fprintf(stderr(&__sF[2]), "doing opt %s\n", cp); | |||
1172 | got_nondir = 1; | |||
1173 | if (do_opt(&cp, &endcp, ep, grp, &has_host, | |||
1174 | &exflags, &anon)) { | |||
1175 | getexp_err(ep, tgrp); | |||
1176 | goto nextline; | |||
1177 | } | |||
1178 | } else if (*cp == '/') { | |||
1179 | savedc = *endcp; | |||
1180 | *endcp = '\0'; | |||
1181 | if (check_dirpath(cp) && | |||
1182 | statfs(cp, &fsb) >= 0) { | |||
1183 | if (got_nondir) { | |||
1184 | syslog(LOG_ERR3, "Dirs must be first"); | |||
1185 | getexp_err(ep, tgrp); | |||
1186 | goto nextline; | |||
1187 | } | |||
1188 | if (ep) { | |||
1189 | if (ep->ex_fs.val[0] != fsb.f_fsid.val[0] || | |||
1190 | ep->ex_fs.val[1] != fsb.f_fsid.val[1]) { | |||
1191 | getexp_err(ep, tgrp); | |||
1192 | goto nextline; | |||
1193 | } | |||
1194 | } else { | |||
1195 | /* | |||
1196 | * See if this directory is already | |||
1197 | * in the list. | |||
1198 | */ | |||
1199 | ep = ex_search(&fsb.f_fsid); | |||
1200 | if (ep == NULL((void *)0)) { | |||
1201 | int len; | |||
1202 | ||||
1203 | ep = get_exp(); | |||
1204 | ep->ex_fs = fsb.f_fsid; | |||
1205 | len = strlen(fsb.f_mntonname) + 1; | |||
1206 | ep->ex_fsdir = malloc(len); | |||
1207 | if (ep->ex_fsdir) | |||
1208 | strlcpy(ep->ex_fsdir, | |||
1209 | fsb.f_mntonname, len); | |||
1210 | else | |||
1211 | out_of_mem(); | |||
1212 | if (debug) | |||
1213 | fprintf(stderr(&__sF[2]), | |||
1214 | "Making new ep fs=0x%x,0x%x\n", | |||
1215 | fsb.f_fsid.val[0], | |||
1216 | fsb.f_fsid.val[1]); | |||
1217 | } else if (debug) | |||
1218 | fprintf(stderr(&__sF[2]), | |||
1219 | "Found ep fs=0x%x,0x%x\n", | |||
1220 | fsb.f_fsid.val[0], | |||
1221 | fsb.f_fsid.val[1]); | |||
1222 | } | |||
1223 | ||||
1224 | /* | |||
1225 | * Add dirpath to export mount point. | |||
1226 | */ | |||
1227 | dirp = add_expdir(&dirhead, cp, len); | |||
1228 | dirplen = len; | |||
1229 | } else { | |||
1230 | getexp_err(ep, tgrp); | |||
1231 | goto nextline; | |||
1232 | } | |||
1233 | *endcp = savedc; | |||
1234 | } else { | |||
1235 | savedc = *endcp; | |||
1236 | *endcp = '\0'; | |||
1237 | got_nondir = 1; | |||
1238 | if (ep == NULL((void *)0)) { | |||
1239 | getexp_err(ep, tgrp); | |||
1240 | goto nextline; | |||
1241 | } | |||
1242 | ||||
1243 | /* | |||
1244 | * Get the host or netgroup. | |||
1245 | */ | |||
1246 | setnetgrent(cp); | |||
1247 | netgrp = getnetgrent((const char **)&hst, | |||
1248 | (const char **)&usr, (const char **)&dom); | |||
1249 | do { | |||
1250 | if (has_host) { | |||
1251 | grp->gr_next = get_grp(); | |||
1252 | grp = grp->gr_next; | |||
1253 | } else { | |||
1254 | memset(grp, 0, sizeof(*grp)); | |||
1255 | } | |||
1256 | if (netgrp) { | |||
1257 | if (hst == NULL((void *)0)) { | |||
1258 | syslog(LOG_ERR3, | |||
1259 | "NULL hostname in netgroup %s, skipping", | |||
1260 | cp); | |||
1261 | grp->gr_type = GT_IGNORE0x5; | |||
1262 | lookup_failed = TRUE(1); | |||
1263 | continue; | |||
1264 | } else if (get_host(hst, grp, tgrp)) { | |||
1265 | syslog(LOG_ERR3, | |||
1266 | "Unknown host (%s) in netgroup %s", | |||
1267 | hst, cp); | |||
1268 | grp->gr_type = GT_IGNORE0x5; | |||
1269 | lookup_failed = TRUE(1); | |||
1270 | continue; | |||
1271 | } | |||
1272 | } else if (get_host(cp, grp, tgrp)) { | |||
1273 | syslog(LOG_ERR3, | |||
1274 | "Unknown host (%s) in line %s", | |||
1275 | cp, line); | |||
1276 | grp->gr_type = GT_IGNORE0x5; | |||
1277 | lookup_failed = TRUE(1); | |||
1278 | continue; | |||
1279 | } | |||
1280 | has_host = TRUE(1); | |||
1281 | num_hosts++; | |||
1282 | } while (netgrp && getnetgrent((const char **)&hst, | |||
1283 | (const char **)&usr, (const char **)&dom)); | |||
1284 | endnetgrent(); | |||
1285 | *endcp = savedc; | |||
1286 | } | |||
1287 | cp = endcp; | |||
1288 | nextfield(&cp, &endcp); | |||
1289 | len = endcp - cp; | |||
1290 | } | |||
1291 | /* | |||
1292 | * If the exports list is empty due to unresolvable hostnames | |||
1293 | * we throw away the line. | |||
1294 | */ | |||
1295 | if (lookup_failed == TRUE(1) && num_hosts == 0 && | |||
1296 | tgrp->gr_type == GT_IGNORE0x5) { | |||
1297 | getexp_err(ep, tgrp); | |||
1298 | goto nextline; | |||
1299 | } | |||
1300 | if (check_options(dirhead)) { | |||
1301 | getexp_err(ep, tgrp); | |||
1302 | goto nextline; | |||
1303 | } | |||
1304 | if (!has_host) { | |||
1305 | grp->gr_type = GT_HOST0x1; | |||
1306 | if (debug) | |||
1307 | fprintf(stderr(&__sF[2]), "Adding a default entry\n"); | |||
1308 | /* add a default group and make the grp list NULL */ | |||
1309 | hpe = malloc(sizeof(struct hostent)); | |||
1310 | if (hpe == NULL((void *)0)) | |||
1311 | out_of_mem(); | |||
1312 | hpe->h_name = strdup("Default"); | |||
1313 | if (hpe->h_name == NULL((void *)0)) | |||
1314 | out_of_mem(); | |||
1315 | hpe->h_addrtype = AF_INET2; | |||
1316 | hpe->h_length = sizeof (u_int32_t); | |||
1317 | hpe->h_addr_list = NULL((void *)0); | |||
1318 | grp->gr_ptr.gt_hostent = hpe; | |||
1319 | ||||
1320 | /* | |||
1321 | * Don't allow a network export coincide with a list of | |||
1322 | * host(s) on the same line. | |||
1323 | */ | |||
1324 | } else if ((opt_flags & OP_NET0x10) && tgrp->gr_next) { | |||
1325 | getexp_err(ep, tgrp); | |||
1326 | goto nextline; | |||
1327 | } | |||
1328 | ||||
1329 | /* | |||
1330 | * Loop through hosts, pushing the exports into the kernel. | |||
1331 | * After loop, tgrp points to the start of the list and | |||
1332 | * grp points to the last entry in the list. | |||
1333 | */ | |||
1334 | grp = tgrp; | |||
1335 | do { | |||
1336 | ||||
1337 | /* | |||
1338 | * remove filesystem from unexport list | |||
1339 | * add MNT_DELEXPORT to exflags to clean up | |||
1340 | * any old addrlist in the kernel | |||
1341 | */ | |||
1342 | ||||
1343 | for (i = 0; i < num; i++) { | |||
1344 | if ((fstbl[i].mntonname != NULL((void *)0)) && | |||
1345 | (strcmp(fsb.f_mntonname, | |||
1346 | fstbl[i].mntonname) == 0) && | |||
1347 | (fstbl[i].exflags & MNT_DELEXPORT0x00020000)) { | |||
1348 | exflags |= MNT_DELEXPORT0x00020000; | |||
1349 | fstbl[i].exflags = 0; | |||
1350 | if (debug) | |||
1351 | fprintf(stderr(&__sF[2]), "removing %s %s from unexport list\n", dirp, fstbl[i].mntonname); | |||
1352 | } | |||
1353 | } | |||
1354 | ||||
1355 | if (debug) | |||
1356 | fprintf(stderr(&__sF[2]), "exporting %s\n", dirp); | |||
1357 | /* | |||
1358 | * Non-zero return indicates an error. Return | |||
1359 | * val of 1 means line is invalid (not just entry). | |||
1360 | */ | |||
1361 | i = do_mount(ep, grp, exflags, &anon, dirp, dirplen); | |||
1362 | exflags &= ~MNT_DELEXPORT0x00020000; | |||
1363 | if (i == 1) { | |||
1364 | getexp_err(ep, tgrp); | |||
1365 | goto nextline; | |||
1366 | } else if (i == 2) { | |||
1367 | syslog(LOG_ERR3, | |||
1368 | "Bad exports list entry (%s) in line %s", | |||
1369 | (grp->gr_type == GT_HOST0x1) | |||
1370 | ? grp->gr_ptr.gt_hostent->h_name | |||
1371 | : (grp->gr_type == GT_NET0x2) | |||
1372 | ? grp->gr_ptr.gt_net.nt_name | |||
1373 | : "Unknown", line); | |||
1374 | } | |||
1375 | } while (grp->gr_next && (grp = grp->gr_next)); | |||
1376 | ||||
1377 | /* | |||
1378 | * Success. Update the data structures. | |||
1379 | */ | |||
1380 | if (has_host) { | |||
1381 | hang_dirp(dirhead, tgrp, ep, opt_flags); | |||
1382 | grp->gr_next = grphead; | |||
1383 | grphead = tgrp; | |||
1384 | } else { | |||
1385 | hang_dirp(dirhead, NULL((void *)0), ep, | |||
1386 | opt_flags); | |||
1387 | free_grp(grp); | |||
1388 | } | |||
1389 | dirhead = NULL((void *)0); | |||
1390 | if ((ep->ex_flag & EX_LINKED0x1) == 0) { | |||
1391 | ep2 = exphead; | |||
1392 | epp = &exphead; | |||
1393 | ||||
1394 | /* | |||
1395 | * Insert in the list in alphabetical order. | |||
1396 | */ | |||
1397 | while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) { | |||
1398 | epp = &ep2->ex_next; | |||
1399 | ep2 = ep2->ex_next; | |||
1400 | } | |||
1401 | if (ep2) | |||
1402 | ep->ex_next = ep2; | |||
1403 | *epp = ep; | |||
1404 | ep->ex_flag |= EX_LINKED0x1; | |||
1405 | } | |||
1406 | nextline: | |||
1407 | if (dirhead) { | |||
1408 | free_dir(dirhead); | |||
1409 | dirhead = NULL((void *)0); | |||
1410 | } | |||
1411 | } | |||
1412 | ||||
1413 | fsp = ofsp; | |||
1414 | for (i = 0; i < num; i++, fsp++) { | |||
1415 | if ((fstbl[i].exflags & MNT_DELEXPORT0x00020000) == 0) | |||
1416 | continue; | |||
1417 | if (debug) | |||
1418 | fprintf(stderr(&__sF[2]), "unexporting %s %s\n", | |||
1419 | fsp->f_mntonname, fstbl[i].mntonname); | |||
1420 | send_imsg(IMSG_DELEXPORT0x4, fsp->f_mntonname, | |||
1421 | sizeof(fsp->f_mntonname)); | |||
1422 | } | |||
1423 | free(fstbl); | |||
1424 | fclose(exp_file); | |||
1425 | } | |||
1426 | ||||
1427 | /* | |||
1428 | * Allocate an export list element | |||
1429 | */ | |||
1430 | struct exportlist * | |||
1431 | get_exp(void) | |||
1432 | { | |||
1433 | struct exportlist *ep; | |||
1434 | ||||
1435 | ep = calloc(1, sizeof (struct exportlist)); | |||
1436 | if (ep == NULL((void *)0)) | |||
1437 | out_of_mem(); | |||
1438 | return (ep); | |||
1439 | } | |||
1440 | ||||
1441 | /* | |||
1442 | * Allocate a group list element | |||
1443 | */ | |||
1444 | struct grouplist * | |||
1445 | get_grp(void) | |||
1446 | { | |||
1447 | struct grouplist *gp; | |||
1448 | ||||
1449 | gp = calloc(1, sizeof (struct grouplist)); | |||
1450 | if (gp == NULL((void *)0)) | |||
1451 | out_of_mem(); | |||
1452 | return (gp); | |||
1453 | } | |||
1454 | ||||
1455 | /* | |||
1456 | * Clean up upon an error in get_exportlist(). | |||
1457 | */ | |||
1458 | void | |||
1459 | getexp_err(struct exportlist *ep, struct grouplist *grp) | |||
1460 | { | |||
1461 | struct grouplist *tgrp; | |||
1462 | ||||
1463 | syslog(LOG_ERR3, "Bad exports list line %s", line); | |||
1464 | if (ep && (ep->ex_flag & EX_LINKED0x1) == 0) | |||
1465 | free_exp(ep); | |||
1466 | while (grp) { | |||
1467 | tgrp = grp; | |||
1468 | grp = grp->gr_next; | |||
1469 | free_grp(tgrp); | |||
1470 | } | |||
1471 | } | |||
1472 | ||||
1473 | /* | |||
1474 | * Search the export list for a matching fs. | |||
1475 | */ | |||
1476 | struct exportlist * | |||
1477 | ex_search(fsid_t *fsid) | |||
1478 | { | |||
1479 | struct exportlist *ep; | |||
1480 | ||||
1481 | ep = exphead; | |||
1482 | while (ep) { | |||
1483 | if (ep->ex_fs.val[0] == fsid->val[0] && | |||
| ||||
1484 | ep->ex_fs.val[1] == fsid->val[1]) | |||
1485 | return (ep); | |||
1486 | ep = ep->ex_next; | |||
1487 | } | |||
1488 | return (ep); | |||
1489 | } | |||
1490 | ||||
1491 | /* | |||
1492 | * Add a directory path to the list. | |||
1493 | */ | |||
1494 | char * | |||
1495 | add_expdir(struct dirlist **dpp, char *cp, int len) | |||
1496 | { | |||
1497 | struct dirlist *dp; | |||
1498 | ||||
1499 | /* do not need +1 because of dp_dirp[1] */ | |||
1500 | dp = malloc(sizeof (struct dirlist) + len); | |||
1501 | if (dp == NULL((void *)0)) | |||
1502 | out_of_mem(); | |||
1503 | dp->dp_left = *dpp; | |||
1504 | dp->dp_right = NULL((void *)0); | |||
1505 | dp->dp_flag = 0; | |||
1506 | dp->dp_hosts = NULL((void *)0); | |||
1507 | strlcpy(dp->dp_dirp, cp, len + 1); | |||
1508 | *dpp = dp; | |||
1509 | return (dp->dp_dirp); | |||
1510 | } | |||
1511 | ||||
1512 | /* | |||
1513 | * Hang the dir list element off the dirpath binary tree as required | |||
1514 | * and update the entry for host. | |||
1515 | */ | |||
1516 | void | |||
1517 | hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep, | |||
1518 | int flags) | |||
1519 | { | |||
1520 | struct hostlist *hp; | |||
1521 | struct dirlist *dp2; | |||
1522 | ||||
1523 | if (flags & OP_ALLDIRS0x40) { | |||
1524 | if (ep->ex_defdir) | |||
1525 | free((caddr_t)dp); | |||
1526 | else | |||
1527 | ep->ex_defdir = dp; | |||
1528 | if (grp == NULL((void *)0)) { | |||
1529 | ep->ex_defdir->dp_flag |= DP_DEFSET0x1; | |||
1530 | } else while (grp) { | |||
1531 | hp = get_ht(); | |||
1532 | hp->ht_grp = grp; | |||
1533 | hp->ht_next = ep->ex_defdir->dp_hosts; | |||
1534 | ep->ex_defdir->dp_hosts = hp; | |||
1535 | grp = grp->gr_next; | |||
1536 | } | |||
1537 | } else { | |||
1538 | ||||
1539 | /* | |||
1540 | * Loop through the directories adding them to the tree. | |||
1541 | */ | |||
1542 | while (dp) { | |||
1543 | dp2 = dp->dp_left; | |||
1544 | add_dlist(&ep->ex_dirl, dp, grp, flags); | |||
1545 | dp = dp2; | |||
1546 | } | |||
1547 | } | |||
1548 | } | |||
1549 | ||||
1550 | /* | |||
1551 | * Traverse the binary tree either updating a node that is already there | |||
1552 | * for the new directory or adding the new node. | |||
1553 | */ | |||
1554 | void | |||
1555 | add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp, | |||
1556 | int flags) | |||
1557 | { | |||
1558 | struct dirlist *dp; | |||
1559 | struct hostlist *hp; | |||
1560 | int cmp; | |||
1561 | ||||
1562 | dp = *dpp; | |||
1563 | if (dp) { | |||
1564 | cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); | |||
1565 | if (cmp > 0) { | |||
1566 | add_dlist(&dp->dp_left, newdp, grp, flags); | |||
1567 | return; | |||
1568 | } else if (cmp < 0) { | |||
1569 | add_dlist(&dp->dp_right, newdp, grp, flags); | |||
1570 | return; | |||
1571 | } else | |||
1572 | free((caddr_t)newdp); | |||
1573 | } else { | |||
1574 | dp = newdp; | |||
1575 | dp->dp_left = NULL((void *)0); | |||
1576 | *dpp = dp; | |||
1577 | } | |||
1578 | if (grp) { | |||
1579 | ||||
1580 | /* | |||
1581 | * Hang all of the host(s) off of the directory point. | |||
1582 | */ | |||
1583 | do { | |||
1584 | hp = get_ht(); | |||
1585 | hp->ht_grp = grp; | |||
1586 | hp->ht_next = dp->dp_hosts; | |||
1587 | dp->dp_hosts = hp; | |||
1588 | grp = grp->gr_next; | |||
1589 | } while (grp); | |||
1590 | } else { | |||
1591 | dp->dp_flag |= DP_DEFSET0x1; | |||
1592 | } | |||
1593 | } | |||
1594 | ||||
1595 | /* | |||
1596 | * Search for a dirpath on the export point. | |||
1597 | */ | |||
1598 | struct dirlist * | |||
1599 | dirp_search(struct dirlist *dp, char *dirpath) | |||
1600 | { | |||
1601 | int cmp; | |||
1602 | ||||
1603 | if (dp) { | |||
1604 | cmp = strcmp(dp->dp_dirp, dirpath); | |||
1605 | if (cmp > 0) | |||
1606 | return (dirp_search(dp->dp_left, dirpath)); | |||
1607 | else if (cmp < 0) | |||
1608 | return (dirp_search(dp->dp_right, dirpath)); | |||
1609 | else | |||
1610 | return (dp); | |||
1611 | } | |||
1612 | return (dp); | |||
1613 | } | |||
1614 | ||||
1615 | /* | |||
1616 | * Scan for a host match in a directory tree. | |||
1617 | */ | |||
1618 | int | |||
1619 | chk_host(struct dirlist *dp, in_addr_t saddr, int *defsetp, int *hostsetp) | |||
1620 | { | |||
1621 | struct hostlist *hp; | |||
1622 | struct grouplist *grp; | |||
1623 | u_int32_t **addrp; | |||
1624 | ||||
1625 | if (dp) { | |||
1626 | if (dp->dp_flag & DP_DEFSET0x1) | |||
1627 | *defsetp = dp->dp_flag; | |||
1628 | hp = dp->dp_hosts; | |||
1629 | while (hp) { | |||
1630 | grp = hp->ht_grp; | |||
1631 | switch (grp->gr_type) { | |||
1632 | case GT_HOST0x1: | |||
1633 | addrp = (u_int32_t **) | |||
1634 | grp->gr_ptr.gt_hostent->h_addr_list; | |||
1635 | while (*addrp) { | |||
1636 | if (**addrp == saddr) { | |||
1637 | *hostsetp = (hp->ht_flag | DP_HOSTSET0x2); | |||
1638 | return (1); | |||
1639 | } | |||
1640 | addrp++; | |||
1641 | } | |||
1642 | break; | |||
1643 | case GT_NET0x2: | |||
1644 | if ((saddr & grp->gr_ptr.gt_net.nt_mask) == | |||
1645 | grp->gr_ptr.gt_net.nt_net) { | |||
1646 | *hostsetp = (hp->ht_flag | DP_HOSTSET0x2); | |||
1647 | return (1); | |||
1648 | } | |||
1649 | break; | |||
1650 | } | |||
1651 | hp = hp->ht_next; | |||
1652 | } | |||
1653 | } | |||
1654 | return (0); | |||
1655 | } | |||
1656 | ||||
1657 | /* | |||
1658 | * Scan tree for a host that matches the address. | |||
1659 | */ | |||
1660 | int | |||
1661 | scan_tree(struct dirlist *dp, in_addr_t saddr) | |||
1662 | { | |||
1663 | int defset, hostset; | |||
1664 | ||||
1665 | if (dp) { | |||
1666 | if (scan_tree(dp->dp_left, saddr)) | |||
1667 | return (1); | |||
1668 | if (chk_host(dp, saddr, &defset, &hostset)) | |||
1669 | return (1); | |||
1670 | if (scan_tree(dp->dp_right, saddr)) | |||
1671 | return (1); | |||
1672 | } | |||
1673 | return (0); | |||
1674 | } | |||
1675 | ||||
1676 | /* | |||
1677 | * Traverse the dirlist tree and free it up. | |||
1678 | */ | |||
1679 | void | |||
1680 | free_dir(struct dirlist *dp) | |||
1681 | { | |||
1682 | ||||
1683 | if (dp) { | |||
1684 | free_dir(dp->dp_left); | |||
1685 | free_dir(dp->dp_right); | |||
1686 | free_host(dp->dp_hosts); | |||
1687 | free((caddr_t)dp); | |||
1688 | } | |||
1689 | } | |||
1690 | ||||
1691 | /* | |||
1692 | * Parse the option string and update fields. | |||
1693 | * Option arguments may either be -<option>=<value> or | |||
1694 | * -<option> <value> | |||
1695 | */ | |||
1696 | int | |||
1697 | do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp, | |||
1698 | int *has_hostp, int *exflagsp, struct xucred *cr) | |||
1699 | { | |||
1700 | char *cp, *endcp, *cpopt, savedc, savedc2 = 0; | |||
1701 | char *cpoptarg, *cpoptend; | |||
1702 | int allflag, usedarg; | |||
1703 | ||||
1704 | cpopt = *cpp; | |||
1705 | cpopt++; | |||
1706 | cp = *endcpp; | |||
1707 | savedc = *cp; | |||
1708 | *cp = '\0'; | |||
1709 | while (cpopt && *cpopt) { | |||
1710 | allflag = 1; | |||
1711 | usedarg = -2; | |||
1712 | if ((cpoptend = strchr(cpopt, ','))) { | |||
1713 | *cpoptend++ = '\0'; | |||
1714 | if ((cpoptarg = strchr(cpopt, '='))) | |||
1715 | *cpoptarg++ = '\0'; | |||
1716 | } else { | |||
1717 | if ((cpoptarg = strchr(cpopt, '='))) | |||
1718 | *cpoptarg++ = '\0'; | |||
1719 | else { | |||
1720 | *cp = savedc; | |||
1721 | nextfield(&cp, &endcp); | |||
1722 | **endcpp = '\0'; | |||
1723 | if (endcp > cp && *cp != '-') { | |||
1724 | cpoptarg = cp; | |||
1725 | savedc2 = *endcp; | |||
1726 | *endcp = '\0'; | |||
1727 | usedarg = 0; | |||
1728 | } | |||
1729 | } | |||
1730 | } | |||
1731 | if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { | |||
1732 | *exflagsp |= MNT_EXRDONLY0x00000080; | |||
1733 | } else if (cpoptarg && (!strcmp(cpopt, "maproot") || | |||
1734 | !(allflag = strcmp(cpopt, "mapall")) || | |||
1735 | !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { | |||
1736 | usedarg++; | |||
1737 | parsecred(cpoptarg, cr); | |||
1738 | if (allflag == 0) { | |||
1739 | *exflagsp |= MNT_EXPORTANON0x00000400; | |||
1740 | opt_flags |= OP_MAPALL0x02; | |||
1741 | } else | |||
1742 | opt_flags |= OP_MAPROOT0x01; | |||
1743 | } else | |||
1744 | if (cpoptarg && (!strcmp(cpopt, "mask") || | |||
1745 | !strcmp(cpopt, "m"))) { | |||
1746 | if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { | |||
1747 | syslog(LOG_ERR3, "Bad mask: %s", cpoptarg); | |||
1748 | return (1); | |||
1749 | } | |||
1750 | usedarg++; | |||
1751 | opt_flags |= OP_MASK0x08; | |||
1752 | } else if (cpoptarg && (!strcmp(cpopt, "network") || | |||
1753 | !strcmp(cpopt, "n"))) { | |||
1754 | if (grp->gr_type != GT_NULL0x0) { | |||
1755 | syslog(LOG_ERR3, "Network/host conflict"); | |||
1756 | return (1); | |||
1757 | } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { | |||
1758 | syslog(LOG_ERR3, "Bad net: %s", cpoptarg); | |||
1759 | return (1); | |||
1760 | } | |||
1761 | grp->gr_type = GT_NET0x2; | |||
1762 | *has_hostp = 1; | |||
1763 | usedarg++; | |||
1764 | opt_flags |= OP_NET0x10; | |||
1765 | } else if (!strcmp(cpopt, "alldirs")) { | |||
1766 | opt_flags |= OP_ALLDIRS0x40; | |||
1767 | } else { | |||
1768 | syslog(LOG_ERR3, "Bad opt %s", cpopt); | |||
1769 | return (1); | |||
1770 | } | |||
1771 | if (usedarg >= 0) { | |||
1772 | *endcp = savedc2; | |||
1773 | **endcpp = savedc; | |||
1774 | if (usedarg > 0) { | |||
1775 | *cpp = cp; | |||
1776 | *endcpp = endcp; | |||
1777 | } | |||
1778 | return (0); | |||
1779 | } | |||
1780 | cpopt = cpoptend; | |||
1781 | } | |||
1782 | **endcpp = savedc; | |||
1783 | return (0); | |||
1784 | } | |||
1785 | ||||
1786 | /* | |||
1787 | * Translate a character string to the corresponding list of network | |||
1788 | * addresses for a hostname. | |||
1789 | */ | |||
1790 | int | |||
1791 | get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp) | |||
1792 | { | |||
1793 | struct hostent *hp, *nhp, t_host; | |||
1794 | struct grouplist *checkgrp; | |||
1795 | char **addrp, **naddrp; | |||
1796 | struct in_addr saddr; | |||
1797 | char *aptr[2]; | |||
1798 | int i; | |||
1799 | ||||
1800 | if (grp->gr_type != GT_NULL0x0) | |||
1801 | return (1); | |||
1802 | if ((hp = gethostbyname(cp)) == NULL((void *)0)) { | |||
1803 | if (isdigit((unsigned char)*cp)) { | |||
1804 | if (inet_aton(cp, &saddr) == 0) { | |||
1805 | syslog(LOG_ERR3, "inet_aton failed for %s", cp); | |||
1806 | return (1); | |||
1807 | } | |||
1808 | if ((hp = gethostbyaddr((caddr_t)&saddr.s_addr, | |||
1809 | sizeof (saddr.s_addr), AF_INET2)) == NULL((void *)0)) { | |||
1810 | hp = &t_host; | |||
1811 | hp->h_name = cp; | |||
1812 | hp->h_addrtype = AF_INET2; | |||
1813 | hp->h_length = sizeof (u_int32_t); | |||
1814 | hp->h_addr_list = aptr; | |||
1815 | aptr[0] = (char *)&saddr; | |||
1816 | aptr[1] = NULL((void *)0); | |||
1817 | } | |||
1818 | } else { | |||
1819 | syslog(LOG_ERR3, "gethostbyname; failed for %s: %s", cp, | |||
1820 | hstrerror(h_errno)); | |||
1821 | return (1); | |||
1822 | } | |||
1823 | } | |||
1824 | ||||
1825 | /* only insert each host onto the list once */ | |||
1826 | for (checkgrp = tgrp; checkgrp; checkgrp = checkgrp->gr_next) { | |||
1827 | if (checkgrp->gr_type == GT_HOST0x1 && | |||
1828 | checkgrp->gr_ptr.gt_hostent != NULL((void *)0) && | |||
1829 | !strcmp(checkgrp->gr_ptr.gt_hostent->h_name, hp->h_name)) { | |||
1830 | grp->gr_type = GT_IGNORE0x5; | |||
1831 | return (0); | |||
1832 | } | |||
1833 | } | |||
1834 | ||||
1835 | grp->gr_type = GT_HOST0x1; | |||
1836 | nhp = grp->gr_ptr.gt_hostent = malloc(sizeof(struct hostent)); | |||
1837 | if (nhp == NULL((void *)0)) | |||
1838 | out_of_mem(); | |||
1839 | memcpy(nhp, hp, sizeof(struct hostent)); | |||
1840 | i = strlen(hp->h_name)+1; | |||
1841 | nhp->h_name = malloc(i); | |||
1842 | if (nhp->h_name == NULL((void *)0)) | |||
1843 | out_of_mem(); | |||
1844 | memcpy(nhp->h_name, hp->h_name, i); | |||
1845 | addrp = hp->h_addr_list; | |||
1846 | i = 1; | |||
1847 | while (*addrp++) | |||
1848 | i++; | |||
1849 | naddrp = nhp->h_addr_list = reallocarray(NULL((void *)0), i, sizeof(char *)); | |||
1850 | if (naddrp == NULL((void *)0)) | |||
1851 | out_of_mem(); | |||
1852 | addrp = hp->h_addr_list; | |||
1853 | while (*addrp) { | |||
1854 | *naddrp = malloc(hp->h_length); | |||
1855 | if (*naddrp == NULL((void *)0)) | |||
1856 | out_of_mem(); | |||
1857 | memcpy(*naddrp, *addrp, hp->h_length); | |||
1858 | addrp++; | |||
1859 | naddrp++; | |||
1860 | } | |||
1861 | *naddrp = NULL((void *)0); | |||
1862 | if (debug) | |||
1863 | fprintf(stderr(&__sF[2]), "got host %s\n", hp->h_name); | |||
1864 | return (0); | |||
1865 | } | |||
1866 | ||||
1867 | /* | |||
1868 | * Free up an exports list component | |||
1869 | */ | |||
1870 | void | |||
1871 | free_exp(struct exportlist *ep) | |||
1872 | { | |||
1873 | ||||
1874 | if (ep->ex_defdir) { | |||
1875 | free_host(ep->ex_defdir->dp_hosts); | |||
1876 | free((caddr_t)ep->ex_defdir); | |||
1877 | } | |||
1878 | free(ep->ex_fsdir); | |||
1879 | free_dir(ep->ex_dirl); | |||
1880 | free((caddr_t)ep); | |||
1881 | } | |||
1882 | ||||
1883 | /* | |||
1884 | * Free hosts. | |||
1885 | */ | |||
1886 | void | |||
1887 | free_host(struct hostlist *hp) | |||
1888 | { | |||
1889 | struct hostlist *hp2; | |||
1890 | ||||
1891 | while (hp) { | |||
1892 | hp2 = hp; | |||
1893 | hp = hp->ht_next; | |||
1894 | free((caddr_t)hp2); | |||
1895 | } | |||
1896 | } | |||
1897 | ||||
1898 | struct hostlist * | |||
1899 | get_ht(void) | |||
1900 | { | |||
1901 | struct hostlist *hp; | |||
1902 | ||||
1903 | hp = malloc(sizeof (struct hostlist)); | |||
1904 | if (hp == NULL((void *)0)) | |||
1905 | out_of_mem(); | |||
1906 | hp->ht_next = NULL((void *)0); | |||
1907 | hp->ht_flag = 0; | |||
1908 | return (hp); | |||
1909 | } | |||
1910 | ||||
1911 | /* | |||
1912 | * Out of memory, fatal | |||
1913 | */ | |||
1914 | void | |||
1915 | out_of_mem(void) | |||
1916 | { | |||
1917 | ||||
1918 | syslog(LOG_ERR3, "Out of memory"); | |||
1919 | exit(2); | |||
1920 | } | |||
1921 | ||||
1922 | /* | |||
1923 | * Do the mount syscall with the update flag to push the export info into | |||
1924 | * the kernel. Returns 0 on success, 1 for fatal error, and 2 for error | |||
1925 | * that only invalidates the specific entry/host. | |||
1926 | */ | |||
1927 | int | |||
1928 | do_mount(struct exportlist *ep, struct grouplist *grp, int exflags, | |||
1929 | struct xucred *anoncrp, char *dirp, int dirplen) | |||
1930 | { | |||
1931 | struct sockaddr_in sin, imask; | |||
1932 | struct export_args args; | |||
1933 | char savedc = '\0'; | |||
1934 | u_int32_t **addrp; | |||
1935 | char *cp = NULL((void *)0); | |||
1936 | in_addr_t net; | |||
1937 | int done; | |||
1938 | ||||
1939 | args.ex_flags = exflags; | |||
1940 | args.ex_anon = *anoncrp; | |||
1941 | memset(&sin, 0, sizeof(sin)); | |||
1942 | memset(&imask, 0, sizeof(imask)); | |||
1943 | sin.sin_family = AF_INET2; | |||
1944 | sin.sin_len = sizeof(sin); | |||
1945 | imask.sin_family = AF_INET2; | |||
1946 | imask.sin_len = sizeof(sin); | |||
1947 | if (grp->gr_type == GT_HOST0x1) | |||
1948 | addrp = (u_int32_t **)grp->gr_ptr.gt_hostent->h_addr_list; | |||
1949 | else | |||
1950 | addrp = NULL((void *)0); | |||
1951 | ||||
1952 | done = FALSE(0); | |||
1953 | while (!done) { | |||
1954 | switch (grp->gr_type) { | |||
1955 | case GT_HOST0x1: | |||
1956 | args.ex_addr = (struct sockaddr *)&sin; | |||
1957 | args.ex_masklen = 0; | |||
1958 | if (!addrp) { | |||
1959 | args.ex_addrlen = 0; | |||
1960 | break; | |||
1961 | } | |||
1962 | sin.sin_addr.s_addr = **addrp; | |||
1963 | args.ex_addrlen = sizeof(sin); | |||
1964 | break; | |||
1965 | case GT_NET0x2: | |||
1966 | sin.sin_addr.s_addr = grp->gr_ptr.gt_net.nt_net; | |||
1967 | args.ex_addr = (struct sockaddr *)&sin; | |||
1968 | args.ex_addrlen = sizeof (sin); | |||
1969 | args.ex_mask = (struct sockaddr *)&imask; | |||
1970 | args.ex_masklen = sizeof (imask); | |||
1971 | if (grp->gr_ptr.gt_net.nt_mask) { | |||
1972 | imask.sin_addr.s_addr = grp->gr_ptr.gt_net.nt_mask; | |||
1973 | break; | |||
1974 | } | |||
1975 | net = ntohl(grp->gr_ptr.gt_net.nt_net)(__uint32_t)(__builtin_constant_p(grp->gr_ptr.gt_net.nt_net ) ? (__uint32_t)(((__uint32_t)(grp->gr_ptr.gt_net.nt_net) & 0xff) << 24 | ((__uint32_t)(grp->gr_ptr.gt_net.nt_net ) & 0xff00) << 8 | ((__uint32_t)(grp->gr_ptr.gt_net .nt_net) & 0xff0000) >> 8 | ((__uint32_t)(grp->gr_ptr .gt_net.nt_net) & 0xff000000) >> 24) : __swap32md(grp ->gr_ptr.gt_net.nt_net)); | |||
1976 | if (IN_CLASSA(net)(((u_int32_t)(net) & ((u_int32_t)(0x80000000))) == ((u_int32_t )(0x00000000)))) | |||
1977 | imask.sin_addr.s_addr = inet_addr("255.0.0.0"); | |||
1978 | else if (IN_CLASSB(net)(((u_int32_t)(net) & ((u_int32_t)(0xc0000000))) == ((u_int32_t )(0x80000000)))) | |||
1979 | imask.sin_addr.s_addr = inet_addr("255.255.0.0"); | |||
1980 | else | |||
1981 | imask.sin_addr.s_addr = inet_addr("255.255.255.0"); | |||
1982 | grp->gr_ptr.gt_net.nt_mask = imask.sin_addr.s_addr; | |||
1983 | break; | |||
1984 | case GT_IGNORE0x5: | |||
1985 | return (0); | |||
1986 | default: | |||
1987 | syslog(LOG_ERR3, "Bad grouptype"); | |||
1988 | if (cp) | |||
1989 | *cp = savedc; | |||
1990 | return (1); | |||
1991 | } | |||
1992 | ||||
1993 | /* | |||
1994 | * XXX: | |||
1995 | * Maybe I should just use the fsb->f_mntonname path instead | |||
1996 | * of looping back up the dirp to the mount point?? | |||
1997 | * Also, needs to know how to export all types of local | |||
1998 | * exportable file systems and not just MOUNT_FFS. | |||
1999 | */ | |||
2000 | while (imsg_export(dirp, &args) == -1) { | |||
2001 | if (cp) | |||
2002 | *cp-- = savedc; | |||
2003 | else | |||
2004 | cp = dirp + dirplen - 1; | |||
2005 | if (errno(*__errno()) == EPERM1) { | |||
2006 | syslog(LOG_ERR3, | |||
2007 | "Can't change attributes for %s (%s).\n", | |||
2008 | dirp, | |||
2009 | (grp->gr_type == GT_HOST0x1) | |||
2010 | ?grp->gr_ptr.gt_hostent->h_name | |||
2011 | :(grp->gr_type == GT_NET0x2) | |||
2012 | ?grp->gr_ptr.gt_net.nt_name | |||
2013 | :"Unknown"); | |||
2014 | return (2); | |||
2015 | } | |||
2016 | if (opt_flags & OP_ALLDIRS0x40) { | |||
2017 | #if 0 | |||
2018 | syslog(LOG_ERR3, "Could not remount %s: %m", | |||
2019 | dirp); | |||
2020 | return (2); | |||
2021 | #endif | |||
2022 | } | |||
2023 | /* back up over the last component */ | |||
2024 | while (cp > dirp && *cp == '/') | |||
2025 | cp--; | |||
2026 | while (cp > dirp && *(cp - 1) != '/') | |||
2027 | cp--; | |||
2028 | if (cp == dirp) { | |||
2029 | if (debug) | |||
2030 | fprintf(stderr(&__sF[2]), "mnt unsucc\n"); | |||
2031 | syslog(LOG_ERR3, "Can't export %s: %m", dirp); | |||
2032 | return (2); | |||
2033 | } | |||
2034 | savedc = *cp; | |||
2035 | *cp = '\0'; | |||
2036 | } | |||
2037 | if (addrp) { | |||
2038 | ++addrp; | |||
2039 | if (*addrp == NULL((void *)0)) | |||
2040 | done = TRUE(1); | |||
2041 | } else | |||
2042 | done = TRUE(1); | |||
2043 | } | |||
2044 | if (cp) | |||
2045 | *cp = savedc; | |||
2046 | return (0); | |||
2047 | } | |||
2048 | ||||
2049 | /* | |||
2050 | * Translate a net address. | |||
2051 | */ | |||
2052 | int | |||
2053 | get_net(char *cp, struct netmsk *net, int maskflg) | |||
2054 | { | |||
2055 | struct in_addr inetaddr, inetaddr2; | |||
2056 | in_addr_t netaddr; | |||
2057 | struct netent *np; | |||
2058 | char *name; | |||
2059 | ||||
2060 | if ((netaddr = inet_network(cp)) != INADDR_NONE((u_int32_t)(0xffffffff))) { | |||
2061 | inetaddr = inet_makeaddr(netaddr, 0); | |||
2062 | /* | |||
2063 | * Due to arbitrary subnet masks, you don't know how many | |||
2064 | * bits to shift the address to make it into a network, | |||
2065 | * however you do know how to make a network address into | |||
2066 | * a host with host == 0 and then compare them. | |||
2067 | * (What a pest) | |||
2068 | */ | |||
2069 | if (!maskflg) { | |||
2070 | setnetent(0); | |||
2071 | while ((np = getnetent())) { | |||
2072 | inetaddr2 = inet_makeaddr(np->n_net, 0); | |||
2073 | if (inetaddr2.s_addr == inetaddr.s_addr) | |||
2074 | break; | |||
2075 | } | |||
2076 | endnetent(); | |||
2077 | } | |||
2078 | } else { | |||
2079 | if ((np = getnetbyname(cp))) | |||
2080 | inetaddr = inet_makeaddr(np->n_net, 0); | |||
2081 | else | |||
2082 | return (1); | |||
2083 | } | |||
2084 | if (maskflg) | |||
2085 | net->nt_mask = inetaddr.s_addr; | |||
2086 | else { | |||
2087 | int len; | |||
2088 | ||||
2089 | if (np) | |||
2090 | name = np->n_name; | |||
2091 | else | |||
2092 | name = inet_ntoa(inetaddr); | |||
2093 | len = strlen(name) + 1; | |||
2094 | net->nt_name = malloc(len); | |||
2095 | if (net->nt_name == NULL((void *)0)) | |||
2096 | out_of_mem(); | |||
2097 | strlcpy(net->nt_name, name, len); | |||
2098 | net->nt_net = inetaddr.s_addr; | |||
2099 | } | |||
2100 | return (0); | |||
2101 | } | |||
2102 | ||||
2103 | /* | |||
2104 | * Parse out the next white space separated field | |||
2105 | */ | |||
2106 | void | |||
2107 | nextfield(char **cp, char **endcp) | |||
2108 | { | |||
2109 | char *p; | |||
2110 | ||||
2111 | p = *cp; | |||
2112 | while (*p == ' ' || *p == '\t') | |||
2113 | p++; | |||
2114 | if (*p == '\n' || *p == '\0') | |||
2115 | *cp = *endcp = p; | |||
2116 | else { | |||
2117 | *cp = p++; | |||
2118 | while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') | |||
2119 | p++; | |||
2120 | *endcp = p; | |||
2121 | } | |||
2122 | } | |||
2123 | ||||
2124 | /* | |||
2125 | * Get an exports file line. Skip over blank lines and handle line | |||
2126 | * continuations. | |||
2127 | */ | |||
2128 | int | |||
2129 | get_line(void) | |||
2130 | { | |||
2131 | int totlen, cont_line, len; | |||
2132 | char *p, *cp; | |||
2133 | ||||
2134 | /* | |||
2135 | * Loop around ignoring blank lines and getting all continuation lines. | |||
2136 | */ | |||
2137 | p = line; | |||
2138 | totlen = 0; | |||
2139 | do { | |||
2140 | if (fgets(p, LINESIZ10240 - totlen, exp_file) == NULL((void *)0)) | |||
2141 | return (0); | |||
2142 | len = strlen(p); | |||
2143 | cp = p + len - 1; | |||
2144 | cont_line = 0; | |||
2145 | while (cp >= p && (*cp == ' ' || *cp == '\t' || *cp == '\n' || | |||
2146 | *cp == '\\')) { | |||
2147 | if (*cp == '\\') | |||
2148 | cont_line = 1; | |||
2149 | cp--; | |||
2150 | len--; | |||
2151 | } | |||
2152 | *++cp = '\0'; | |||
2153 | if (len > 0) { | |||
2154 | totlen += len; | |||
2155 | if (totlen >= LINESIZ10240) { | |||
2156 | syslog(LOG_ERR3, "Exports line too long"); | |||
2157 | exit(2); | |||
2158 | } | |||
2159 | p = cp; | |||
2160 | } | |||
2161 | } while (totlen == 0 || cont_line); | |||
2162 | return (1); | |||
2163 | } | |||
2164 | ||||
2165 | /* | |||
2166 | * Parse a description of a credential. | |||
2167 | */ | |||
2168 | void | |||
2169 | parsecred(char *namelist, struct xucred *cr) | |||
2170 | { | |||
2171 | gid_t groups[NGROUPS_MAX16 + 1]; | |||
2172 | char *name, *names; | |||
2173 | struct passwd *pw; | |||
2174 | struct group *gr; | |||
2175 | int ngroups, cnt; | |||
2176 | ||||
2177 | /* | |||
2178 | * Set up the unprivileged user. | |||
2179 | */ | |||
2180 | *cr = def_anon; | |||
2181 | ||||
2182 | /* | |||
2183 | * Get the user's password table entry. | |||
2184 | */ | |||
2185 | names = strsep(&namelist, " \t\n"); | |||
2186 | name = strsep(&names, ":"); | |||
2187 | if (isdigit((unsigned char)*name) || *name == '-') | |||
2188 | pw = getpwuid(atoi(name)); | |||
2189 | else | |||
2190 | pw = getpwnam(name); | |||
2191 | /* | |||
2192 | * Credentials specified as those of a user. | |||
2193 | */ | |||
2194 | if (names == NULL((void *)0)) { | |||
2195 | if (pw == NULL((void *)0)) { | |||
2196 | syslog(LOG_ERR3, "Unknown user: %s", name); | |||
2197 | return; | |||
2198 | } | |||
2199 | cr->cr_uid = pw->pw_uid; | |||
2200 | ngroups = NGROUPS_MAX16 + 1; | |||
2201 | if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) | |||
2202 | syslog(LOG_ERR3, "Too many groups for %s: %m", pw->pw_name); | |||
2203 | /* | |||
2204 | * compress out duplicate | |||
2205 | */ | |||
2206 | cr->cr_ngroups = ngroups - 1; | |||
2207 | cr->cr_gid = groups[0]; | |||
2208 | for (cnt = 1; cnt < ngroups; cnt++) | |||
2209 | cr->cr_groups[cnt - 1] = groups[cnt]; | |||
2210 | return; | |||
2211 | } | |||
2212 | /* | |||
2213 | * Explicit credential specified as a colon separated list: | |||
2214 | * uid:gid:gid:... | |||
2215 | */ | |||
2216 | if (pw != NULL((void *)0)) | |||
2217 | cr->cr_uid = pw->pw_uid; | |||
2218 | else if (isdigit((unsigned char)*name) || *name == '-') | |||
2219 | cr->cr_uid = atoi(name); | |||
2220 | else { | |||
2221 | syslog(LOG_ERR3, "Unknown user: %s", name); | |||
2222 | return; | |||
2223 | } | |||
2224 | cr->cr_ngroups = 0; | |||
2225 | while (names != NULL((void *)0) && *names != '\0' && cr->cr_ngroups < NGROUPS_MAX16) { | |||
2226 | name = strsep(&names, ":"); | |||
2227 | if (isdigit((unsigned char)*name) || *name == '-') { | |||
2228 | cr->cr_groups[cr->cr_ngroups++] = atoi(name); | |||
2229 | } else { | |||
2230 | if ((gr = getgrnam(name)) == NULL((void *)0)) { | |||
2231 | syslog(LOG_ERR3, "Unknown group: %s", name); | |||
2232 | continue; | |||
2233 | } | |||
2234 | cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid; | |||
2235 | } | |||
2236 | } | |||
2237 | if (names != NULL((void *)0) && *names != '\0' && cr->cr_ngroups == NGROUPS_MAX16) | |||
2238 | syslog(LOG_ERR3, "Too many groups"); | |||
2239 | } | |||
2240 | ||||
2241 | #define STRSIZ(255 +1024 +50) (RPCMNT_NAMELEN255+RPCMNT_PATHLEN1024+50) | |||
2242 | /* | |||
2243 | * Routines that maintain the remote mounttab | |||
2244 | */ | |||
2245 | void | |||
2246 | get_mountlist(void) | |||
2247 | { | |||
2248 | struct mountlist *mlp, **mlpp; | |||
2249 | char *host, *dirp, *cp; | |||
2250 | char str[STRSIZ(255 +1024 +50)]; | |||
2251 | FILE *mlfile; | |||
2252 | ||||
2253 | if ((mlfile = fopen(_PATH_RMOUNTLIST"/var/db/mountdtab", "r")) == NULL((void *)0)) { | |||
2254 | syslog(LOG_ERR3, "Can't open %s: %m", _PATH_RMOUNTLIST"/var/db/mountdtab"); | |||
2255 | return; | |||
2256 | } | |||
2257 | mlpp = &mlhead; | |||
2258 | while (fgets(str, STRSIZ(255 +1024 +50), mlfile) != NULL((void *)0)) { | |||
2259 | cp = str; | |||
2260 | host = strsep(&cp, " \t\n"); | |||
2261 | dirp = strsep(&cp, " \t\n"); | |||
2262 | if (host == NULL((void *)0) || dirp == NULL((void *)0)) | |||
2263 | continue; | |||
2264 | mlp = malloc(sizeof (*mlp)); | |||
2265 | if (mlp == NULL((void *)0)) | |||
2266 | out_of_mem(); | |||
2267 | strlcpy(mlp->ml_host, host, sizeof(mlp->ml_host)); | |||
2268 | strlcpy(mlp->ml_dirp, dirp, sizeof(mlp->ml_dirp)); | |||
2269 | mlp->ml_next = NULL((void *)0); | |||
2270 | *mlpp = mlp; | |||
2271 | mlpp = &mlp->ml_next; | |||
2272 | } | |||
2273 | fclose(mlfile); | |||
2274 | } | |||
2275 | ||||
2276 | void | |||
2277 | del_mlist(char *hostp, char *dirp) | |||
2278 | { | |||
2279 | struct mountlist *mlp, **mlpp; | |||
2280 | struct mountlist *mlp2; | |||
2281 | int fnd = 0; | |||
2282 | ||||
2283 | mlpp = &mlhead; | |||
2284 | mlp = mlhead; | |||
2285 | while (mlp) { | |||
2286 | if (!strcmp(mlp->ml_host, hostp) && | |||
2287 | (!dirp || !strcmp(mlp->ml_dirp, dirp))) { | |||
2288 | fnd = 1; | |||
2289 | mlp2 = mlp; | |||
2290 | *mlpp = mlp = mlp->ml_next; | |||
2291 | free((caddr_t)mlp2); | |||
2292 | } else { | |||
2293 | mlpp = &mlp->ml_next; | |||
2294 | mlp = mlp->ml_next; | |||
2295 | } | |||
2296 | } | |||
2297 | if (fnd) { | |||
2298 | send_imsg(IMSG_MLIST_OPEN0x6, NULL((void *)0), 0); | |||
2299 | mlp = mlhead; | |||
2300 | while (mlp) { | |||
2301 | send_imsg(IMSG_MLIST_WRITE0x8, mlp, sizeof(*mlp)); | |||
2302 | mlp = mlp->ml_next; | |||
2303 | } | |||
2304 | send_imsg(IMSG_MLIST_CLOSE0x7, NULL((void *)0), 0); | |||
2305 | } | |||
2306 | } | |||
2307 | ||||
2308 | void | |||
2309 | add_mlist(char *hostp, char *dirp) | |||
2310 | { | |||
2311 | struct mountlist *mlp, **mlpp; | |||
2312 | ||||
2313 | mlpp = &mlhead; | |||
2314 | mlp = mlhead; | |||
2315 | while (mlp) { | |||
2316 | if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) | |||
2317 | return; | |||
2318 | mlpp = &mlp->ml_next; | |||
2319 | mlp = mlp->ml_next; | |||
2320 | } | |||
2321 | mlp = malloc(sizeof (*mlp)); | |||
2322 | if (mlp == NULL((void *)0)) | |||
2323 | out_of_mem(); | |||
2324 | strlcpy(mlp->ml_host, hostp, sizeof(mlp->ml_host)); | |||
2325 | strlcpy(mlp->ml_dirp, dirp, sizeof(mlp->ml_dirp)); | |||
2326 | mlp->ml_next = NULL((void *)0); | |||
2327 | *mlpp = mlp; | |||
2328 | send_imsg(IMSG_MLIST_APPEND0x5, mlp, sizeof(*mlp)); | |||
2329 | } | |||
2330 | ||||
2331 | /* | |||
2332 | * This function is called via SIGTERM when the system is going down. | |||
2333 | * It sends a broadcast RPCMNT_UMNTALL. | |||
2334 | */ | |||
2335 | void | |||
2336 | send_umntall(int signo) | |||
2337 | { | |||
2338 | gotterm = 1; | |||
2339 | } | |||
2340 | ||||
2341 | int | |||
2342 | umntall_each(caddr_t resultsp, struct sockaddr_in *raddr) | |||
2343 | { | |||
2344 | return (1); | |||
2345 | } | |||
2346 | ||||
2347 | /* | |||
2348 | * Free up a group list. | |||
2349 | */ | |||
2350 | void | |||
2351 | free_grp(struct grouplist *grp) | |||
2352 | { | |||
2353 | char **addrp; | |||
2354 | ||||
2355 | if (grp->gr_type == GT_HOST0x1) { | |||
2356 | if (grp->gr_ptr.gt_hostent->h_name) { | |||
2357 | addrp = grp->gr_ptr.gt_hostent->h_addr_list; | |||
2358 | while (addrp && *addrp) | |||
2359 | free(*addrp++); | |||
2360 | free((caddr_t)grp->gr_ptr.gt_hostent->h_addr_list); | |||
2361 | free(grp->gr_ptr.gt_hostent->h_name); | |||
2362 | } | |||
2363 | free((caddr_t)grp->gr_ptr.gt_hostent); | |||
2364 | } else if (grp->gr_type == GT_NET0x2) { | |||
2365 | free(grp->gr_ptr.gt_net.nt_name); | |||
2366 | } | |||
2367 | free((caddr_t)grp); | |||
2368 | } | |||
2369 | ||||
2370 | /* | |||
2371 | * Check options for consistency. | |||
2372 | */ | |||
2373 | int | |||
2374 | check_options(struct dirlist *dp) | |||
2375 | { | |||
2376 | ||||
2377 | if (dp == NULL((void *)0)) | |||
2378 | return (1); | |||
2379 | if ((opt_flags & (OP_MAPROOT0x01 | OP_MAPALL0x02)) == (OP_MAPROOT0x01 | OP_MAPALL0x02)) { | |||
2380 | syslog(LOG_ERR3, "-mapall and -maproot mutually exclusive"); | |||
2381 | return (1); | |||
2382 | } | |||
2383 | if ((opt_flags & OP_MASK0x08) && (opt_flags & OP_NET0x10) == 0) { | |||
2384 | syslog(LOG_ERR3, "-mask requires -network"); | |||
2385 | return (1); | |||
2386 | } | |||
2387 | if ((opt_flags & OP_ALLDIRS0x40) && dp->dp_left) { | |||
2388 | syslog(LOG_ERR3, "-alldirs has multiple directories"); | |||
2389 | return (1); | |||
2390 | } | |||
2391 | return (0); | |||
2392 | } | |||
2393 | ||||
2394 | /* | |||
2395 | * Check an absolute directory path for any symbolic links. Return true | |||
2396 | * if no symbolic links are found. | |||
2397 | */ | |||
2398 | int | |||
2399 | check_dirpath(char *dirp) | |||
2400 | { | |||
2401 | struct stat sb; | |||
2402 | int ret = 1; | |||
2403 | char *cp; | |||
2404 | ||||
2405 | /* Remove trailing '/' */ | |||
2406 | cp = dirp + strlen(dirp) - 1; | |||
2407 | while (cp > dirp && *cp == '/') | |||
2408 | *cp-- = '\0'; | |||
2409 | ||||
2410 | cp = dirp + 1; | |||
2411 | while (*cp && ret) { | |||
2412 | if (*cp == '/') { | |||
2413 | *cp = '\0'; | |||
2414 | if (lstat(dirp, &sb) == -1 || !S_ISDIR(sb.st_mode)((sb.st_mode & 0170000) == 0040000)) | |||
2415 | ret = 0; | |||
2416 | *cp = '/'; | |||
2417 | } | |||
2418 | cp++; | |||
2419 | } | |||
2420 | if (lstat(dirp, &sb) == -1 || | |||
2421 | (!S_ISDIR(sb.st_mode)((sb.st_mode & 0170000) == 0040000) && !S_ISREG(sb.st_mode)((sb.st_mode & 0170000) == 0100000))) | |||
2422 | ret = 0; | |||
2423 | return (ret); | |||
2424 | } |