1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
24 */
25
26 #include <sys/types.h>
27 #include <sys/stat.h>
28 #include <sys/ioccom.h>
29 #include <sys/corectl.h>
30 #include <stdio.h>
31 #include <string.h>
32 #include <strings.h>
33 #include <stdlib.h>
34 #include <unistd.h>
35 #include <stdarg.h>
36 #include <fcntl.h>
37 #include <wait.h>
38 #include <signal.h>
39 #include <atomic.h>
40 #include <libscf.h>
41 #include <limits.h>
42 #include <priv_utils.h>
43 #include <door.h>
44 #include <errno.h>
45 #include <pthread.h>
46 #include <time.h>
47 #include <libscf.h>
48 #include <zone.h>
49 #include <libgen.h>
50 #include <pwd.h>
51 #include <grp.h>
52
53 #include <smbsrv/smb_door.h>
54 #include <smbsrv/smb_ioctl.h>
55 #include <smbsrv/string.h>
56 #include <smbsrv/libsmb.h>
57 #include <smbsrv/libsmbns.h>
58 #include <smbsrv/libmlsvc.h>
59 #include "smbd.h"
60
61 #define SECSPERMIN 60
62 #define SMBD_ONLINE_WAIT_INTERVAL 10
63 #define SMBD_REFRESH_INTERVAL 10
64 #define SMB_DBDIR "/var/smb"
65
66 static int smbd_daemonize_init(void);
67 static void smbd_daemonize_fini(int, int);
68 static int smb_init_daemon_priv(int, uid_t, gid_t);
69
70 static int smbd_kernel_bind(void);
71 static void smbd_kernel_unbind(void);
72 static int smbd_already_running(void);
73
74 static int smbd_service_init(void);
75 static void smbd_service_fini(void);
76
77 static int smbd_setup_options(int argc, char *argv[]);
78 static void smbd_usage(FILE *fp);
79
80 static int32_t smbd_gmtoff(void);
81 static void smbd_localtime_init(void);
82 static void *smbd_localtime_monitor(void *arg);
83
84 static void smbd_dyndns_init(void);
85 static void smbd_load_shares(void);
86 static void *smbd_share_loader(void *);
87
88 static void smbd_refresh_handler(void);
89
90 static int smbd_kernel_start(void);
91
92 smbd_t smbd;
93
94 /*
95 * Use SMF error codes only on return or exit.
96 */
97 int
main(int argc,char * argv[])98 main(int argc, char *argv[])
99 {
100 sigset_t set;
101 uid_t uid;
102 int pfd = -1;
103 int sigval;
104 struct rlimit rl;
105 int orig_limit;
106
107 #ifdef FKSMBD
108 fksmbd_init();
109 #endif
110 smbd.s_pname = basename(argv[0]);
111 openlog(smbd.s_pname, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
112
113 if (smbd_setup_options(argc, argv) != 0)
114 return (SMF_EXIT_ERR_FATAL);
115
116 if ((uid = getuid()) != smbd.s_uid) {
117 #ifdef FKSMBD
118 /* Can't manipulate privileges in daemonize. */
119 if (smbd.s_fg == 0) {
120 smbd.s_fg = 1;
121 smbd_report("user %d (forced -f)", uid);
122 }
123 #else /* FKSMBD */
124 smbd_report("user %d: %s", uid, strerror(EPERM));
125 return (SMF_EXIT_ERR_FATAL);
126 #endif /* FKSMBD */
127 }
128
129 if (is_system_labeled()) {
130 smbd_report("Trusted Extensions not supported");
131 return (SMF_EXIT_ERR_FATAL);
132 }
133
134 if (smbd_already_running())
135 return (SMF_EXIT_OK);
136
137 /*
138 * Raise the file descriptor limit to accommodate simultaneous user
139 * authentications/file access.
140 */
141 if ((getrlimit(RLIMIT_NOFILE, &rl) == 0) &&
142 (rl.rlim_cur < rl.rlim_max)) {
143 orig_limit = rl.rlim_cur;
144 rl.rlim_cur = rl.rlim_max;
145 if (setrlimit(RLIMIT_NOFILE, &rl) != 0)
146 smbd_report("Failed to raise file descriptor limit"
147 " from %d to %d", orig_limit, rl.rlim_cur);
148 }
149
150 /*
151 * Block async signals in all threads.
152 */
153 (void) sigemptyset(&set);
154
155 (void) sigaddset(&set, SIGHUP);
156 (void) sigaddset(&set, SIGINT);
157 (void) sigaddset(&set, SIGQUIT);
158 (void) sigaddset(&set, SIGPIPE);
159 (void) sigaddset(&set, SIGTERM);
160 (void) sigaddset(&set, SIGUSR1);
161 (void) sigaddset(&set, SIGUSR2);
162
163 (void) sigprocmask(SIG_SETMASK, &set, NULL);
164
165 if (smbd.s_fg) {
166 if (smbd_service_init() != 0) {
167 smbd_report("service initialization failed");
168 exit(SMF_EXIT_ERR_FATAL);
169 }
170 } else {
171 /*
172 * "pfd" is a pipe descriptor -- any fatal errors
173 * during subsequent initialization of the child
174 * process should be written to this pipe and the
175 * parent will report this error as the exit status.
176 */
177 pfd = smbd_daemonize_init();
178
179 if (smbd_service_init() != 0) {
180 smbd_report("daemon initialization failed");
181 exit(SMF_EXIT_ERR_FATAL);
182 }
183
184 smbd_daemonize_fini(pfd, SMF_EXIT_OK);
185 }
186
187 while (!smbd.s_shutting_down) {
188 sigval = sigwait(&set);
189
190 switch (sigval) {
191 case -1:
192 syslog(LOG_DEBUG, "sigwait failed: %s",
193 strerror(errno));
194 break;
195 case SIGPIPE:
196 break;
197
198 case SIGHUP:
199 syslog(LOG_DEBUG, "refresh requested");
200 smbd_refresh_handler();
201 break;
202
203 case SIGUSR1:
204 syslog(LOG_DEBUG, "SIGUSR1 ignored");
205 break;
206
207 default:
208 /*
209 * Typically SIGINT or SIGTERM.
210 */
211 smbd.s_shutting_down = B_TRUE;
212 break;
213 }
214 }
215
216 /*
217 * Allow termination signals while shutting down.
218 */
219 (void) sigemptyset(&set);
220
221 if (smbd.s_fg) {
222 (void) sigaddset(&set, SIGHUP);
223 (void) sigaddset(&set, SIGINT);
224 }
225 (void) sigaddset(&set, SIGTERM);
226
227 (void) sigprocmask(SIG_UNBLOCK, &set, NULL);
228
229 smbd_service_fini();
230 return ((smbd.s_fatal_error) ? SMF_EXIT_ERR_FATAL : SMF_EXIT_OK);
231 }
232
233 /*
234 * This function will fork off a child process,
235 * from which only the child will return.
236 *
237 * Use SMF error codes only on exit.
238 */
239 static int
smbd_daemonize_init(void)240 smbd_daemonize_init(void)
241 {
242 int status, pfds[2];
243 sigset_t set, oset;
244 pid_t pid;
245 int rc;
246
247 /*
248 * Reset privileges to the minimum set required. We continue
249 * to run as root to create and access files in /var.
250 */
251 rc = smb_init_daemon_priv(PU_RESETGROUPS, smbd.s_uid, smbd.s_gid);
252
253 if (rc != 0) {
254 smbd_report("insufficient privileges");
255 exit(SMF_EXIT_ERR_FATAL);
256 }
257
258 /*
259 * Block all signals prior to the fork and leave them blocked in the
260 * parent so we don't get in a situation where the parent gets SIGINT
261 * and returns non-zero exit status and the child is actually running.
262 * In the child, restore the signal mask once we've done our setsid().
263 */
264 (void) sigfillset(&set);
265 (void) sigdelset(&set, SIGABRT);
266 (void) sigprocmask(SIG_BLOCK, &set, &oset);
267
268 if (pipe(pfds) == -1) {
269 smbd_report("unable to create pipe");
270 exit(SMF_EXIT_ERR_FATAL);
271 }
272
273 closelog();
274
275 if ((pid = fork()) == -1) {
276 openlog(smbd.s_pname, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
277 smbd_report("unable to fork");
278 closelog();
279 exit(SMF_EXIT_ERR_FATAL);
280 }
281
282 /*
283 * If we're the parent process, wait for either the child to send us
284 * the appropriate exit status over the pipe or for the read to fail
285 * (presumably with 0 for EOF if our child terminated abnormally).
286 * If the read fails, exit with either the child's exit status if it
287 * exited or with SMF_EXIT_ERR_FATAL if it died from a fatal signal.
288 */
289 if (pid != 0) {
290 (void) close(pfds[1]);
291
292 if (read(pfds[0], &status, sizeof (status)) == sizeof (status))
293 _exit(status);
294
295 if (waitpid(pid, &status, 0) == pid && WIFEXITED(status))
296 _exit(WEXITSTATUS(status));
297
298 _exit(SMF_EXIT_ERR_FATAL);
299 }
300
301 openlog(smbd.s_pname, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
302 (void) setsid();
303 (void) sigprocmask(SIG_SETMASK, &oset, NULL);
304 (void) chdir("/");
305 (void) umask(022);
306 (void) close(pfds[0]);
307
308 return (pfds[1]);
309 }
310
311 /*
312 * This function is based on __init_daemon_priv() and replaces
313 * __init_daemon_priv() since we want smbd to have all privileges so that it
314 * can execute map/unmap commands with all privileges during share
315 * connection/disconnection. Unused privileges are disabled until command
316 * execution. The permitted and the limit set contains all privileges. The
317 * inheritable set contains no privileges.
318 */
319
320 static const char root_cp[] = "/core.%f.%t";
321 static const char daemon_cp[] = "/var/tmp/core.%f.%t";
322
323 static int
smb_init_daemon_priv(int flags,uid_t uid,gid_t gid)324 smb_init_daemon_priv(int flags, uid_t uid, gid_t gid)
325 {
326 priv_set_t *perm = NULL;
327 int ret = -1;
328 char buf[1024];
329
330 /*
331 * This is not a significant failure: it allows us to start programs
332 * with sufficient privileges and with the proper uid. We don't
333 * care enough about the extra groups in that case.
334 */
335 if (flags & PU_RESETGROUPS)
336 (void) setgroups(0, NULL);
337
338 if (gid != (gid_t)-1 && setgid(gid) != 0)
339 goto end;
340
341 perm = priv_allocset();
342 if (perm == NULL)
343 goto end;
344
345 /* E = P */
346 (void) getppriv(PRIV_PERMITTED, perm);
347 (void) setppriv(PRIV_SET, PRIV_EFFECTIVE, perm);
348
349 /* Now reset suid and euid */
350 if (uid != (uid_t)-1 && setreuid(uid, uid) != 0)
351 goto end;
352
353 /* I = 0 */
354 priv_emptyset(perm);
355 ret = setppriv(PRIV_SET, PRIV_INHERITABLE, perm);
356 end:
357 priv_freeset(perm);
358
359 if (core_get_process_path(buf, sizeof (buf), getpid()) == 0 &&
360 strcmp(buf, "core") == 0) {
361
362 if ((uid == (uid_t)-1 ? geteuid() : uid) == 0) {
363 (void) core_set_process_path(root_cp, sizeof (root_cp),
364 getpid());
365 } else {
366 (void) core_set_process_path(daemon_cp,
367 sizeof (daemon_cp), getpid());
368 }
369 }
370 (void) setpflags(__PROC_PROTECT, 0);
371
372 return (ret);
373 }
374
375 /*
376 * Most privileges, except the ones that are required for smbd, are turn off
377 * in the effective set. They will be turn on when needed for command
378 * execution during share connection/disconnection.
379 */
380 static void
smbd_daemonize_fini(int fd,int exit_status)381 smbd_daemonize_fini(int fd, int exit_status)
382 {
383 priv_set_t *pset;
384
385 /*
386 * Now that we're running, if a pipe fd was specified, write an exit
387 * status to it to indicate that our parent process can safely detach.
388 * Then proceed to loading the remaining non-built-in modules.
389 */
390 if (fd >= 0)
391 (void) write(fd, &exit_status, sizeof (exit_status));
392
393 (void) close(fd);
394
395 pset = priv_allocset();
396 if (pset == NULL)
397 return;
398
399 priv_basicset(pset);
400
401 /* list of privileges for smbd */
402 (void) priv_addset(pset, PRIV_NET_MAC_AWARE);
403 (void) priv_addset(pset, PRIV_NET_PRIVADDR);
404 (void) priv_addset(pset, PRIV_PROC_AUDIT);
405 (void) priv_addset(pset, PRIV_SYS_DEVICES);
406 (void) priv_addset(pset, PRIV_SYS_SMB);
407 (void) priv_addset(pset, PRIV_SYS_MOUNT);
408
409 priv_inverse(pset);
410
411 /* turn off unneeded privileges */
412 (void) setppriv(PRIV_OFF, PRIV_EFFECTIVE, pset);
413
414 priv_freeset(pset);
415
416 /* reenable core dumps */
417 __fini_daemon_priv(NULL);
418 }
419
420 /*
421 * smbd_service_init
422 */
423 static int
smbd_service_init(void)424 smbd_service_init(void)
425 {
426 static struct dir {
427 char *name;
428 int perm;
429 } dir[] = {
430 { SMB_DBDIR, 0700 },
431 { SMB_CVOL, 0755 },
432 { SMB_SYSROOT, 0755 },
433 { SMB_SYSTEM32, 0755 },
434 { SMB_VSS, 0755 },
435 { SMB_PIPE_DIR, 0755 },
436 };
437 int rc, i;
438
439 smbd.s_pid = getpid();
440
441 /*
442 * Stop for a debugger attach here, which is after the
443 * fork() etc. in smb_daemonize_init()
444 */
445 if (smbd.s_dbg_stop) {
446 smbd_report("pid %d stop for debugger attach", smbd.s_pid);
447 (void) kill(smbd.s_pid, SIGSTOP);
448 }
449 smbd_report("smbd starting, pid %d", smbd.s_pid);
450
451 for (i = 0; i < sizeof (dir)/sizeof (dir[0]); ++i) {
452 if ((mkdir(dir[i].name, dir[i].perm) < 0) &&
453 (errno != EEXIST)) {
454 smbd_report("mkdir %s: %s", dir[i].name,
455 strerror(errno));
456 return (-1);
457 }
458 }
459
460 if ((rc = smb_ccache_init(SMB_VARRUN_DIR, SMB_CCACHE_FILE)) != 0) {
461 if (rc == -1)
462 smbd_report("mkdir %s: %s", SMB_VARRUN_DIR,
463 strerror(errno));
464 else
465 smbd_report("unable to set KRB5CCNAME");
466 return (-1);
467 }
468
469 smb_codepage_init();
470
471 rc = smbd_cups_init();
472 if (smb_config_getbool(SMB_CI_PRINT_ENABLE))
473 smbd_report("print service %savailable", (rc == 0) ? "" : "un");
474
475 if (smbd_nicmon_start(SMBD_DEFAULT_INSTANCE_FMRI) != 0)
476 smbd_report("NIC monitor failed to start");
477
478 smbd_dyndns_init();
479 smb_ipc_init();
480
481 if (smb_config_getbool(SMB_CI_NETBIOS_ENABLE) == 0)
482 smbd_report("NetBIOS services disabled");
483 else if (smb_netbios_start() != 0)
484 smbd_report("NetBIOS services failed to start");
485 else
486 smbd_report("NetBIOS services started");
487
488 smbd.s_secmode = smb_config_get_secmode();
489 if ((rc = smb_domain_init(smbd.s_secmode)) != 0) {
490 if (rc == SMB_DOMAIN_NOMACHINE_SID) {
491 smbd_report(
492 "no machine SID: check idmap configuration");
493 return (-1);
494 }
495 }
496
497 if (smbd_dc_monitor_init() != 0)
498 smbd_report("DC monitor initialization failed %s",
499 strerror(errno));
500
501 if (smbd_pipesvc_start() != 0) {
502 smbd_report("pipesvc initialization failed");
503 return (-1);
504 }
505
506 smbd.s_door_srv = smbd_door_start();
507 if (smbd.s_door_srv < 0) {
508 smbd_report("door initialization failed %s", strerror(errno));
509 return (-1);
510 }
511
512 dyndns_update_zones();
513 smbd_localtime_init();
514 (void) smb_lgrp_start();
515 smb_pwd_init(B_TRUE);
516
517 if (smb_shr_start() != 0) {
518 smbd_report("share initialization failed: %s", strerror(errno));
519 return (-1);
520 }
521
522 smbd.s_door_lmshr = smbd_share_start();
523 if (smbd.s_door_lmshr < 0)
524 smbd_report("share initialization failed");
525
526 /* Open the driver, load the kernel config. */
527 if (smbd_kernel_bind() != 0) {
528 return (-1);
529 }
530
531 smbd_load_shares();
532 smbd_load_printers();
533 smbd_spool_start();
534
535 smbd.s_initialized = B_TRUE;
536 smbd_report("service initialized");
537
538 return (0);
539 }
540
541 /*
542 * Shutdown smbd and smbsrv kernel services.
543 *
544 * Called only by the main thread.
545 */
546 static void
smbd_service_fini(void)547 smbd_service_fini(void)
548 {
549
550 smbd.s_shutting_down = B_TRUE;
551 smbd_report("service shutting down");
552
553 smb_kmod_stop();
554 smb_logon_abort();
555 smb_lgrp_stop();
556 smbd_pipesvc_stop();
557 smbd_door_stop();
558 smbd_spool_stop();
559 smbd_kernel_unbind();
560 smbd_share_stop();
561 smb_shr_stop();
562 dyndns_stop();
563 smbd_nicmon_stop();
564 smb_ccache_remove(SMB_CCACHE_PATH);
565 smb_pwd_fini();
566 smb_domain_fini();
567 mlsvc_fini();
568 smb_netbios_stop();
569 smbd_cups_fini();
570
571 smbd.s_initialized = B_FALSE;
572 smbd_report("service terminated");
573 closelog();
574 }
575
576 /*
577 * Called when SMF sends us a SIGHUP. Update the smbd configuration
578 * from SMF and check for changes that require service reconfiguration.
579 */
580 static void
smbd_refresh_handler()581 smbd_refresh_handler()
582 {
583 int new_debug;
584
585 if (smbd.s_shutting_down)
586 return;
587
588 smbd.s_refreshes++;
589
590 new_debug = smb_config_get_debug();
591 if (smbd.s_debug || new_debug)
592 smbd_report("debug=%d", new_debug);
593 smbd.s_debug = new_debug;
594
595 smbd_spool_stop();
596 smbd_dc_monitor_refresh();
597 smb_ccache_remove(SMB_CCACHE_PATH);
598
599 /*
600 * Clear the DNS zones for the existing interfaces
601 * before updating the NIC interface list.
602 */
603 dyndns_clear_zones();
604
605 if (smbd_nicmon_refresh() != 0)
606 smbd_report("NIC monitor refresh failed");
607
608 smb_netbios_name_reconfig();
609 smb_browser_reconfig();
610 dyndns_update_zones();
611
612 /* This reloads the in-kernel config. */
613 (void) smbd_kernel_bind();
614
615 smbd_load_shares();
616 smbd_load_printers();
617 smbd_spool_start();
618 }
619
620 void
smbd_set_secmode(int secmode)621 smbd_set_secmode(int secmode)
622 {
623 switch (secmode) {
624 case SMB_SECMODE_WORKGRP:
625 case SMB_SECMODE_DOMAIN:
626 (void) smb_config_set_secmode(secmode);
627 smbd.s_secmode = secmode;
628 break;
629
630 default:
631 syslog(LOG_ERR, "invalid security mode: %d", secmode);
632 syslog(LOG_ERR, "entering maintenance mode");
633 (void) smb_smf_maintenance_mode();
634 }
635 }
636
637 /*
638 * The service is online if initialization is complete and shutdown
639 * has not begun.
640 */
641 boolean_t
smbd_online(void)642 smbd_online(void)
643 {
644 return (smbd.s_initialized && !smbd.s_shutting_down);
645 }
646
647 /*
648 * Wait until the service is online. Provided for threads that
649 * should wait until the service has been fully initialized before
650 * they start performing operations.
651 */
652 void
smbd_online_wait(const char * text)653 smbd_online_wait(const char *text)
654 {
655 while (!smbd_online())
656 (void) sleep(SMBD_ONLINE_WAIT_INTERVAL);
657
658 if (text != NULL) {
659 syslog(LOG_DEBUG, "%s: online", text);
660 (void) fprintf(stderr, "%s: online\n", text);
661 }
662 }
663
664 /*
665 * If the door has already been opened by another process (non-zero pid
666 * in target), we assume that another smbd is already running. If there
667 * is a race here, it will be caught later when smbsrv is opened because
668 * only one process is allowed to open the device at a time.
669 */
670 static int
smbd_already_running(void)671 smbd_already_running(void)
672 {
673 door_info_t info;
674 char *door_name;
675 int door;
676
677 door_name = getenv("SMBD_DOOR_NAME");
678 if (door_name == NULL)
679 door_name = SMBD_DOOR_NAME;
680
681 if ((door = open(door_name, O_RDONLY)) < 0)
682 return (0);
683
684 if (door_info(door, &info) < 0)
685 return (0);
686
687 if (info.di_target > 0) {
688 smbd_report("already running: pid %ld\n", info.di_target);
689 (void) close(door);
690 return (1);
691 }
692
693 (void) close(door);
694 return (0);
695 }
696
697 /*
698 * smbd_kernel_bind
699 *
700 * If smbsrv is already bound, reload the configuration and update smbsrv.
701 * Otherwise, open the smbsrv device and start the kernel service.
702 */
703 static int
smbd_kernel_bind(void)704 smbd_kernel_bind(void)
705 {
706 smb_kmod_cfg_t cfg;
707 int rc;
708
709 if (smbd.s_kbound) {
710 smb_load_kconfig(&cfg);
711 rc = smb_kmod_setcfg(&cfg);
712 if (rc < 0)
713 smbd_report("kernel configuration update failed: %s",
714 strerror(rc));
715 return (rc);
716 }
717
718 if (smb_kmod_isbound())
719 smbd_kernel_unbind();
720
721 if ((rc = smb_kmod_bind()) == 0) {
722 rc = smbd_kernel_start();
723 if (rc != 0)
724 smb_kmod_unbind();
725 else
726 smbd.s_kbound = B_TRUE;
727 } else {
728 smbd_report("kernel bind error: %s", strerror(rc));
729 }
730
731 return (rc);
732 }
733
734 static int
smbd_kernel_start(void)735 smbd_kernel_start(void)
736 {
737 smb_kmod_cfg_t cfg;
738 int rc;
739
740 smb_load_kconfig(&cfg);
741 rc = smb_kmod_setcfg(&cfg);
742 if (rc != 0) {
743 smbd_report("kernel config ioctl error: %s", strerror(rc));
744 return (rc);
745 }
746
747 rc = smb_kmod_setgmtoff(smbd_gmtoff());
748 if (rc != 0) {
749 smbd_report("kernel gmtoff ioctl error: %s", strerror(rc));
750 return (rc);
751 }
752
753 rc = smb_kmod_start(smbd.s_door_opipe, smbd.s_door_lmshr,
754 smbd.s_door_srv);
755
756 if (rc != 0) {
757 smbd_report("kernel start ioctl error: %s", strerror(rc));
758 return (rc);
759 }
760
761 return (0);
762 }
763
764 /*
765 * smbd_kernel_unbind
766 */
767 static void
smbd_kernel_unbind(void)768 smbd_kernel_unbind(void)
769 {
770 smb_kmod_unbind();
771 smbd.s_kbound = B_FALSE;
772 }
773
774 /*
775 * Create the Dynamic DNS publisher thread.
776 */
777 static void
smbd_dyndns_init(void)778 smbd_dyndns_init(void)
779 {
780 pthread_t tid;
781 pthread_attr_t attr;
782 int rc;
783
784 dyndns_start();
785
786 (void) pthread_attr_init(&attr);
787 (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
788 rc = pthread_create(&tid, &attr, dyndns_publisher, NULL);
789 (void) pthread_attr_destroy(&attr);
790
791 if (rc != 0)
792 smbd_report("unable to start dyndns publisher: %s",
793 strerror(errno));
794 }
795
796 /*
797 * Launches a thread to populate the share cache by share information
798 * stored in sharemgr
799 */
800 static void
smbd_load_shares(void)801 smbd_load_shares(void)
802 {
803 pthread_t tid;
804 pthread_attr_t attr;
805 int rc;
806
807 (void) pthread_attr_init(&attr);
808 (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
809 rc = pthread_create(&tid, &attr, smbd_share_loader, NULL);
810 (void) pthread_attr_destroy(&attr);
811
812 if (rc != 0)
813 smbd_report("unable to load disk shares: %s", strerror(errno));
814 }
815
816 static void *
smbd_share_loader(void * args)817 smbd_share_loader(void *args)
818 {
819 (void) smb_shr_load(args);
820 return (NULL);
821 }
822
823 /*
824 * Initialization of the localtime thread.
825 * Returns 0 on success, an error number if thread creation fails.
826 */
827
828 static void
smbd_localtime_init(void)829 smbd_localtime_init(void)
830 {
831 pthread_attr_t attr;
832 int rc;
833
834 (void) pthread_attr_init(&attr);
835 (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
836 rc = pthread_create(&smbd.s_localtime_tid, &attr,
837 smbd_localtime_monitor, NULL);
838 (void) pthread_attr_destroy(&attr);
839
840 if (rc != 0)
841 smbd_report("unable to monitor localtime: %s", strerror(errno));
842 }
843
844 /*
845 * Send local gmtoff to the kernel module one time at startup and each
846 * time it changes (up to twice a year).
847 * Local gmtoff is checked once every 15 minutes since some timezones
848 * are aligned on half and quarter hour boundaries.
849 */
850 /*ARGSUSED*/
851 static void *
smbd_localtime_monitor(void * arg)852 smbd_localtime_monitor(void *arg)
853 {
854 struct tm local_tm;
855 time_t secs;
856 int32_t gmtoff, last_gmtoff = -1;
857 int timeout;
858 int error;
859
860 smbd_online_wait("smbd_localtime_monitor");
861
862 for (;;) {
863 gmtoff = smbd_gmtoff();
864
865 if ((last_gmtoff != gmtoff) && smbd.s_kbound) {
866 error = smb_kmod_setgmtoff(gmtoff);
867 if (error != 0)
868 smbd_report("localtime set failed: %s",
869 strerror(error));
870 }
871
872 /*
873 * Align the next iteration on a fifteen minute boundary.
874 */
875 secs = time(0);
876 (void) localtime_r(&secs, &local_tm);
877 timeout = ((15 - (local_tm.tm_min % 15)) * SECSPERMIN);
878 (void) sleep(timeout);
879
880 last_gmtoff = gmtoff;
881 }
882
883 /*NOTREACHED*/
884 return (NULL);
885 }
886
887 /*
888 * smbd_gmtoff
889 *
890 * Determine offset from GMT. If daylight saving time use altzone,
891 * otherwise use timezone.
892 */
893 static int32_t
smbd_gmtoff(void)894 smbd_gmtoff(void)
895 {
896 time_t clock_val;
897 struct tm *atm;
898 int32_t gmtoff;
899
900 (void) time(&clock_val);
901 atm = localtime(&clock_val);
902
903 gmtoff = (atm->tm_isdst) ? altzone : timezone;
904
905 return (gmtoff);
906 }
907
908 /*
909 * Set up configuration options and parse the command line.
910 * This function will determine if we will run as a daemon
911 * or in the foreground.
912 *
913 * Failure to find a uid or gid results in using the default (0).
914 */
915 static int
smbd_setup_options(int argc,char * argv[])916 smbd_setup_options(int argc, char *argv[])
917 {
918 struct passwd *pwd;
919 struct group *grp;
920 int c;
921
922 if ((pwd = getpwnam("root")) != NULL)
923 smbd.s_uid = pwd->pw_uid;
924
925 if ((grp = getgrnam("sys")) != NULL)
926 smbd.s_gid = grp->gr_gid;
927
928 smbd.s_debug = smb_config_get_debug();
929 smbd.s_fg = smb_config_get_fg_flag();
930
931 while ((c = getopt(argc, argv, ":dfs")) != -1) {
932 switch (c) {
933 case 'd':
934 smbd.s_debug++;
935 break;
936 case 'f':
937 smbd.s_fg = 1;
938 break;
939 case 's':
940 smbd.s_dbg_stop = 1;
941 break;
942 case ':':
943 case '?':
944 default:
945 smbd_usage(stderr);
946 return (-1);
947 }
948 }
949
950 return (0);
951 }
952
953 static void
smbd_usage(FILE * fp)954 smbd_usage(FILE *fp)
955 {
956 static char *help[] = {
957 "-d enable debug messages"
958 "-f run program in foreground"
959 };
960
961 int i;
962
963 (void) fprintf(fp, "Usage: %s [-f]\n", smbd.s_pname);
964
965 for (i = 0; i < sizeof (help)/sizeof (help[0]); ++i)
966 (void) fprintf(fp, " %s\n", help[i]);
967 }
968
969 void
smbd_report(const char * fmt,...)970 smbd_report(const char *fmt, ...)
971 {
972 char buf[128];
973 va_list ap;
974
975 if (fmt == NULL)
976 return;
977
978 va_start(ap, fmt);
979 (void) vsnprintf(buf, 128, fmt, ap);
980 va_end(ap);
981
982 (void) fprintf(stderr, "smbd: %s\n", buf);
983 }
984
985 /*
986 * Enable libumem debugging by default on DEBUG builds.
987 */
988 #ifdef DEBUG
989 const char *
_umem_debug_init(void)990 _umem_debug_init(void)
991 {
992 return ("default,verbose"); /* $UMEM_DEBUG setting */
993 }
994
995 const char *
_umem_logging_init(void)996 _umem_logging_init(void)
997 {
998 return ("fail,contents"); /* $UMEM_LOGGING setting */
999 }
1000 #endif
1001