source: trunk/src/samhain.c@ 229

Last change on this file since 229 was 215, checked in by katerina, 16 years ago

Consolidate filtering code (ticket #142) and match on regular expressions (ticket #143).
File size: 49.6 KB
Line 
1/* SAMHAIN file system integrity testing */
2/* Copyright (C) 1999, 2000 Rainer Wichmann */
3/* */
4/* This program is free software; you can redistribute it */
5/* and/or modify */
6/* it under the terms of the GNU General Public License as */
7/* published by */
8/* the Free Software Foundation; either version 2 of the License, or */
9/* (at your option) any later version. */
10/* */
11/* This program is distributed in the hope that it will be useful, */
12/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
13/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
14/* GNU General Public License for more details. */
15/* */
16/* You should have received a copy of the GNU General Public License */
17/* along with this program; if not, write to the Free Software */
18/* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20#include "config_xor.h"
21
22
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26#include <unistd.h>
27#include <fcntl.h>
28
29/* samhainctl */
30#include <sys/types.h>
31#include <sys/stat.h>
32#include <sys/wait.h>
33#include <signal.h>
34#include <errno.h>
35
36
37#if TIME_WITH_SYS_TIME
38#include <sys/time.h>
39#include <time.h>
40#else
41#if HAVE_SYS_TIME_H
42#include <sys/time.h>
43#else
44#include <time.h>
45#endif
46#endif
47
48#ifdef HAVE_MEMORY_H
49#include <memory.h>
50#endif
51
52#ifdef HAVE_SETPRIORITY
53#include <sys/resource.h>
54#endif
55
56#ifndef HAVE_LSTAT
57#define lstat stat
58#endif
59
60/* for FLT_EPSILON
61 */
62#include <float.h>
63
64#include "samhain.h"
65#include "sh_pthread.h"
66#include "sh_files.h"
67#include "sh_utils.h"
68#include "sh_error.h"
69#include "sh_unix.h"
70#include "sh_getopt.h"
71#include "sh_readconf.h"
72#include "sh_hash.h"
73
74#include "sh_nmail.h"
75
76#include "sh_tiger.h"
77#include "sh_gpg.h"
78#include "sh_mem.h"
79#include "sh_forward.h"
80#include "sh_tools.h"
81#include "sh_hash.h"
82#if defined(WITH_EXTERNAL)
83#include "sh_extern.h"
84#endif
85#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
86#include "sh_modules.h"
87#include "sh_ignore.h"
88#include "sh_prelink.h"
89#endif
90
91#undef FIL__
92#define FIL__ _("samhain.c")
93
94
95/**************************************************
96 *
97 * Needed to compile the key into the code.
98 *
99 **************************************************/
100
101extern UINT32 ErrFlag[2];
102#include "sh_MK.h"
103
104/**************************************************
105 *
106 * Variables for signal handling.
107 *
108 **************************************************/
109
110volatile int sig_raised;
111volatile int sig_urgent;
112volatile int sig_debug_switch; /* SIGUSR1 */
113volatile int sig_suspend_switch; /* SIGUSR2 */
114volatile int sh_global_suspend_flag;
115volatile int sig_fresh_trail; /* SIGIOT */
116volatile int sh_thread_pause_flag = S_FALSE;
117volatile int sig_config_read_again; /* SIGHUP */
118volatile int sig_terminate; /* SIGQUIT */
119volatile int sig_termfast; /* SIGTERM */
120volatile int sig_force_check; /* SIGTTOU */
121long int eintr__result;
122char sh_sig_msg[SH_MINIBUF];
123
124
125#ifdef SH_STEALTH
126/**************************************************
127 *
128 * The following set of functions is required for
129 * the 'stealth' mode.
130 *
131 **************************************************/
132
133#ifndef SH_MAX_GLOBS
134#define SH_MAX_GLOBS 16
135#endif
136
137#ifndef GLOB_LEN
138#define GLOB_LEN 511
139#endif
140
141#ifdef HAVE_PTHREAD
142struct gt {
143 size_t g_count;
144 char * g_glob;
145};
146
147pthread_key_t g_key;
148
149int sh_g_thread()
150{
151 struct gt * ptr = malloc(sizeof(struct gt));
152 if (!ptr)
153 return -1;
154 ptr->g_count = 0;
155 ptr->g_glob = calloc(1, SH_MAX_GLOBS * (GLOB_LEN+1));
156 if (!(ptr->g_glob))
157 return -1;
158 return pthread_setspecific(g_key, ptr);
159}
160
161void sh_g_destroy(void * data)
162{
163 struct gt * ptr = (struct gt *) data;
164 free(ptr->g_glob);
165 free(ptr);
166 return;
167}
168
169void sh_g_init(void)
170{
171#if !defined(USE_SYSTEM_MALLOC) && defined(USE_MALLOC_LOCK)
172 extern int dnmalloc_pthread_init(void);
173 dnmalloc_pthread_init();
174#endif
175
176 if (0 != pthread_key_create(&g_key, sh_g_destroy))
177 {
178 perror("1");
179 exit(EXIT_FAILURE);
180 }
181
182 if (0 != sh_g_thread())
183 {
184 perror("2");
185 exit(EXIT_FAILURE);
186 }
187 return;
188}
189#define SH_G_INIT sh_g_init()
190#else
191#define SH_G_INIT ((void)0)
192#endif
193
194char * globber(const char * str)
195{
196 size_t i;
197 size_t j;
198
199#ifndef HAVE_PTHREAD
200 static size_t count = 0;
201 static char glob[SH_MAX_GLOBS * (GLOB_LEN+1)];
202#else
203 struct gt * ptr = pthread_getspecific(g_key);
204 size_t count;
205 char * glob;
206
207 if (ptr) {
208 count = ptr->g_count;
209 glob = ptr->g_glob;
210 } else {
211 return NULL;
212 }
213#endif
214
215 if (str != NULL)
216 j = strlen(str);
217 else
218 return NULL;
219
220 ASSERT((j <= GLOB_LEN), _("j <= GLOB_LEN"))
221
222 if (j > GLOB_LEN)
223 j = GLOB_LEN;
224
225 /* Overwrap the buffer.
226 */
227 if ( (count + j) >= (SH_MAX_GLOBS * (GLOB_LEN+1)))
228 {
229 count = 0;
230 }
231
232 for (i = 0; i < j; ++i)
233 {
234 if (str[i] != '\n' && str[i] != '\t' && str[i] != '\r' && str[i] != '"')
235 glob[count + i] = str[i] ^ XOR_CODE;
236 else
237 glob[count + i] = str[i];
238 }
239 glob[count + j] = '\0';
240
241 i = count;
242#ifdef HAVE_PTHREAD
243 ptr->g_count = count + j + 1;
244#else
245 count = count + j + 1;
246#endif
247 return &glob[i];
248}
249
250void sh_do_encode (char * str, int len)
251{
252 register int i;
253
254 /* this is a symmetric operation
255 */
256 for (i = 0; i < len; ++i)
257 {
258 str[i] = str[i] ^ XOR_CODE;
259 }
260 return;
261}
262
263#else
264/* not stealth */
265#define SH_G_INIT ((void)0)
266#endif
267
268/**************************************************
269 *
270 * Global variables.
271 *
272 **************************************************/
273
274sh_struct sh;
275/*@null@*/ sh_key_t * skey = NULL;
276
277extern unsigned char TcpFlag[8][PW_LEN+1];
278
279/**************************************************
280 *
281 * Initializing.
282 *
283 **************************************************/
284
285static int is_samhainctl_init = S_FALSE;
286
287static
288void sh_init (void)
289{
290 unsigned char * dez = NULL;
291 int i;
292#if defined(SH_WITH_MAIL)
293 char * p;
294 char q[SH_PATHBUF];
295#endif
296
297 SL_ENTER(_("sh_init"));
298
299#ifdef MKA_09
300 ErrFlag[0] |= (1 << 8);
301#endif
302#ifdef MKA_10
303 ErrFlag[0] |= (1 << 9);
304#endif
305#ifdef MKA_11
306 ErrFlag[0] |= (1 << 10);
307#endif
308#ifdef MKA_12
309 ErrFlag[0] |= (1 << 11);
310#endif
311#ifdef MKA_13
312 ErrFlag[0] |= (1 << 12);
313#endif
314#ifdef MKA_14
315 ErrFlag[0] |= (1 << 13);
316#endif
317#ifdef MKA_15
318 ErrFlag[0] |= (1 << 14);
319#endif
320#ifdef MKA_16
321 ErrFlag[0] |= (1 << 15);
322#endif
323
324 /* Signal handling.
325 */
326 sig_raised = 0;
327 sig_config_read_again = 0; /* SIGHUP */
328 sig_debug_switch = 0; /* SIGUSR1 */
329 sig_suspend_switch = 0; /* SIGUSR2 */
330 sh_global_suspend_flag = 0; /* SIGUSR2 */
331 sig_fresh_trail = 0; /* SIGIOT */
332 sig_terminate = 0; /* SIGQUIT */
333 sig_termfast = 0; /* SIGTERM */
334 sig_force_check = 0; /* SIGTTOU */
335 strcpy ( sh_sig_msg, _("None"));
336
337#ifdef MKB_01
338 ErrFlag[1] |= (1 << 0);
339#endif
340#ifdef MKB_02
341 ErrFlag[1] |= (1 << 1);
342#endif
343#ifdef MKB_03
344 ErrFlag[1] |= (1 << 2);
345#endif
346#ifdef MKB_04
347 ErrFlag[1] |= (1 << 3);
348#endif
349#ifdef MKB_05
350 ErrFlag[1] |= (1 << 4);
351#endif
352#ifdef MKB_06
353 ErrFlag[1] |= (1 << 5);
354#endif
355#ifdef MKB_07
356 ErrFlag[1] |= (1 << 6);
357#endif
358#ifdef MKB_08
359 ErrFlag[1] |= (1 << 7);
360#endif
361
362#if defined(SH_WITH_SERVER) && !defined(SH_WITH_CLIENT)
363 strncpy(sh.prg_name, _("Yule"), 8);
364 sh.prg_name[4] = '\0';
365#else
366 strncpy(sh.prg_name, _("Samhain"), 8);
367 sh.prg_name[7] = '\0';
368#endif
369
370 sh.pid = (UINT64) getpid();
371
372 /* The flags.
373 */
374 if (is_samhainctl_init == S_FALSE)
375 sh.flag.checkSum = SH_CHECK_NONE;
376 sh.flag.update = S_FALSE;
377 sh.flag.opts = S_FALSE;
378 if (is_samhainctl_init == S_FALSE)
379 sh.flag.isdaemon = S_FALSE;
380 sh.flag.isserver = S_FALSE;
381 sh.flag.islocked = S_FALSE;
382 sh.flag.smsg = S_FALSE;
383 sh.flag.log_start = S_TRUE;
384 sh.flag.reportonce = S_TRUE;
385 sh.flag.fulldetail = S_FALSE;
386 sh.flag.audit = S_FALSE;
387 sh.flag.nice = 0;
388 sh.flag.aud_mask = 0xFFFFFFFFUL;
389 sh.flag.client_severity = S_FALSE;
390 sh.flag.client_class = S_FALSE;
391 sh.flag.hidefile = S_FALSE;
392 sh.flag.loop = S_FALSE;
393
394#ifdef MKB_09
395 ErrFlag[1] |= (1 << 8);
396#endif
397#ifdef MKB_10
398 ErrFlag[1] |= (1 << 9);
399#endif
400#ifdef MKB_11
401 ErrFlag[1] |= (1 << 10);
402#endif
403#ifdef MKB_12
404 ErrFlag[1] |= (1 << 11);
405#endif
406#ifdef MKB_13
407 ErrFlag[1] |= (1 << 12);
408#endif
409#ifdef MKB_14
410 ErrFlag[1] |= (1 << 13);
411#endif
412#ifdef MKB_15
413 ErrFlag[1] |= (1 << 14);
414#endif
415#ifdef MKB_16
416 ErrFlag[1] |= (1 << 15);
417#endif
418
419 /* The stats.
420 */
421 sh.statistics.bytes_speed = 0;
422 sh.statistics.bytes_hashed = 0;
423 sh.statistics.mail_success = 0;
424 sh.statistics.mail_failed = 0;
425 sh.statistics.time_start = time(NULL);
426 sh.statistics.time_check = (time_t) 0;
427
428#ifdef MKC_01
429 ErrFlag[0] |= (1 << 16);
430#endif
431#ifdef MKC_02
432 ErrFlag[0] |= (1 << 17);
433#endif
434#ifdef MKC_03
435 ErrFlag[0] |= (1 << 18);
436#endif
437#ifdef MKC_04
438 ErrFlag[0] |= (1 << 19);
439#endif
440#ifdef MKC_05
441 ErrFlag[0] |= (1 << 20);
442#endif
443#ifdef MKC_06
444 ErrFlag[0] |= (1 << 21);
445#endif
446#ifdef MKC_07
447 ErrFlag[0] |= (1 << 22);
448#endif
449#ifdef MKC_08
450 ErrFlag[0] |= (1 << 23);
451#endif
452
453
454 /* The local host.
455 */
456 (void) sl_strlcpy (sh.host.name, _("localhost"), SH_MINIBUF);
457 sh.host.system[0] = '\0'; /* flawfinder: ignore *//* ff bug */
458 sh.host.release[0] = '\0';
459 sh.host.machine[0] = '\0';
460
461#ifdef MKC_09
462 ErrFlag[0] |= (1 << 24);
463#endif
464#ifdef MKC_10
465 ErrFlag[0] |= (1 << 25);
466#endif
467#ifdef MKC_11
468 ErrFlag[0] |= (1 << 26);
469#endif
470#ifdef MKC_12
471 ErrFlag[0] |= (1 << 27);
472#endif
473#ifdef MKC_13
474 ErrFlag[0] |= (1 << 28);
475#endif
476#ifdef MKC_14
477 ErrFlag[0] |= (1 << 29);
478#endif
479#ifdef MKC_15
480 ErrFlag[0] |= (1 << 30);
481#endif
482#ifdef MKC_16
483 ErrFlag[0] |= (1UL << 31);
484#endif
485
486 /* The paths.
487 */
488 (void) sl_strlcpy (sh.conf.path, DEFAULT_CONFIGFILE, SH_PATHBUF);
489 sh.conf.hash[0] = '\0';
490 (void) sl_strlcpy (sh.data.path, DEFAULT_DATA_FILE, SH_PATHBUF);
491 sh.data.hash[0] = '\0';
492 sh.exec.path[0] = '\0';
493 sh.exec.hash[0] = '\0';
494
495#ifdef MKD_01
496 ErrFlag[1] |= (1 << 16);
497#endif
498#ifdef MKD_02
499 ErrFlag[1] |= (1 << 17);
500#endif
501#ifdef MKD_03
502 ErrFlag[1] |= (1 << 18);
503#endif
504#ifdef MKD_04
505 ErrFlag[1] |= (1 << 19);
506#endif
507#ifdef MKD_05
508 ErrFlag[1] |= (1 << 20);
509#endif
510#ifdef MKD_06
511 ErrFlag[1] |= (1 << 21);
512#endif
513#ifdef MKD_07
514 ErrFlag[1] |= (1 << 22);
515#endif
516#ifdef MKD_08
517 ErrFlag[1] |= (1 << 23);
518#endif
519
520 /* The addresses.
521 */
522#if defined(SH_WITH_MAIL)
523 if (0 != strcmp (DEFAULT_MAILADDRESS, _("NULL")))
524 {
525#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
526 char * saveptr;
527 (void) sl_strncpy(q, DEFAULT_MAILADDRESS, SH_PATHBUF);
528 p = strtok_r (q, ", \t", &saveptr);
529 if (p)
530 {
531 (void) sh_nmail_add_compiled_recipient (p);
532 while (NULL != (p = strtok_r (NULL, ", \t", &saveptr)))
533 (void) sh_nmail_add_compiled_recipient (p);
534 }
535#else
536 (void) sl_strncpy(q, DEFAULT_MAILADDRESS, SH_PATHBUF);
537 p = strtok (q, ", \t");
538 if (p)
539 {
540 (void) sh_nmail_add_compiled_recipient (p);
541 while (NULL != (p = strtok (NULL, ", \t")))
542 (void) sh_nmail_add_compiled_recipient (p);
543 }
544#endif
545 }
546#endif
547
548 if (0 == strcmp (ALT_TIMESERVER, _("NULL")))
549 sh.srvtime.alt[0] = '\0';
550 else
551 (void) sl_strlcpy (sh.srvtime.alt, ALT_TIMESERVER, SH_PATHBUF);
552 if (0 == strcmp (DEFAULT_TIMESERVER, _("NULL")))
553 sh.srvtime.name[0] = '\0';
554 else
555 (void) sl_strlcpy (sh.srvtime.name, DEFAULT_TIMESERVER, SH_PATHBUF);
556
557
558 if (0 == strcmp (ALT_LOGSERVER, _("NULL")))
559 sh.srvexport.alt[0] = '\0';
560 else
561 (void) sl_strlcpy (sh.srvexport.alt, ALT_LOGSERVER, SH_PATHBUF);
562 if (0 == strcmp (DEFAULT_LOGSERVER, _("NULL")))
563 sh.srvexport.name[0] = '\0';
564 else
565 (void) sl_strlcpy (sh.srvexport.name, DEFAULT_LOGSERVER, SH_PATHBUF);
566
567
568 if (0 == strcmp (DEFAULT_ERRLOCK, _("NULL")))
569 sh.srvlog.alt[0] = '\0';
570 else
571 (void) sl_strlcpy (sh.srvlog.alt, DEFAULT_ERRLOCK, SH_PATHBUF);
572 if (0 == strcmp (DEFAULT_ERRFILE, _("NULL")))
573 sh.srvlog.name[0] = '\0';
574 else
575 (void) sl_strlcpy (sh.srvlog.name, DEFAULT_ERRFILE, SH_PATHBUF);
576
577 if (0 == strcmp (ALT_CONSOLE, _("NULL")))
578 sh.srvcons.alt[0] = '\0';
579 else
580 (void) sl_strlcpy (sh.srvcons.alt, ALT_CONSOLE, SH_PATHBUF);
581#ifndef DEFAULT_CONSOLE
582 (void) sl_strlcpy (sh.srvcons.name, _("/dev/console"), SH_PATHBUF);
583#else
584 if (0 == strcmp (DEFAULT_CONSOLE, _("NULL")))
585 (void) sl_strlcpy (sh.srvcons.name, _("/dev/console"), SH_PATHBUF);
586 else
587 (void) sl_strlcpy (sh.srvcons.name, DEFAULT_CONSOLE, SH_PATHBUF);
588#endif
589
590#ifdef MKD_09
591 ErrFlag[1] |= (1 << 24);
592#endif
593#ifdef MKD_10
594 ErrFlag[1] |= (1 << 25);
595#endif
596#ifdef MKD_11
597 ErrFlag[1] |= (1 << 26);
598#endif
599#ifdef MKD_12
600 ErrFlag[1] |= (1 << 27);
601#endif
602#ifdef MKD_13
603 ErrFlag[1] |= (1 << 28);
604#endif
605#ifdef MKD_14
606 ErrFlag[1] |= (1 << 29);
607#endif
608#ifdef MKD_15
609 ErrFlag[1] |= (1 << 30);
610#endif
611#ifdef MKD_16
612 ErrFlag[1] |= (1UL << 31);
613#endif
614
615
616 /* The timers.
617 */
618 sh.fileCheck.alarm_last = 0;
619 sh.fileCheck.alarm_interval = 600; /* ten minutes */
620
621 sh.mailTime.alarm_last = 0;
622 sh.mailTime.alarm_interval = 86400;
623
624 sh.mailNum.alarm_last = 0;
625 sh.mailNum.alarm_interval = 10;
626
627 sh.looptime = 60;
628
629 /* The struct to hold privileged information.
630 */
631 skey = (sh_key_t *) malloc (sizeof(sh_key_t));
632 if (skey != NULL)
633 {
634
635 skey->mlock_failed = SL_FALSE;
636 skey->rngI = BAD;
637 /* properly initialized later
638 */
639 skey->rng0[0] = 0x03; skey->rng0[1] = 0x09; skey->rng0[2] = 0x17;
640 skey->rng1[0] = 0x03; skey->rng1[1] = 0x09; skey->rng1[2] = 0x17;
641 skey->rng2[0] = 0x03; skey->rng2[1] = 0x09; skey->rng2[2] = 0x17;
642
643 for (i = 0; i < KEY_BYT; ++i)
644 skey->poolv[i] = '\0';
645
646 skey->poolc = 0;
647
648 skey->ErrFlag[0] = ErrFlag[0];
649 ErrFlag[0] = 0;
650 skey->ErrFlag[1] = ErrFlag[1];
651 ErrFlag[1] = 0;
652
653 dez = &(TcpFlag[POS_TF-1][0]);
654 for (i = 0; i < PW_LEN; ++i)
655 {
656 skey->pw[i] = (char) (*dez);
657 (*dez) = '\0';
658 ++dez;
659 }
660
661 skey->sh_sockpass[0] = '\0';
662 skey->sigkey_old[0] = '\0';
663 skey->sigkey_new[0] = '\0';
664 skey->mailkey_old[0] = '\0';
665 skey->mailkey_new[0] = '\0';
666 skey->crypt[0] = '\0'; /* flawfinder: ignore *//* ff bug */
667 skey->session[0] = '\0';
668 skey->vernam[0] = '\0';
669 }
670 else
671 {
672 perror(_("sh_init"));
673 _exit (EXIT_FAILURE);
674 }
675
676 sh_unix_memlock();
677 SL_RET0(_("sh_init"));
678}
679
680
681#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
682#include <sys/mman.h>
683#endif
684
685#if defined(SH_USE_XML)
686extern int sh_log_file (char * message, char * inet_peer);
687#endif
688
689/*******************************************************
690 *
691 * Exit Handler
692 *
693 *******************************************************/
694static void exit_handler(void)
695{
696 /* --- Clean up modules, if any. ---
697 */
698#if defined(SH_WITH_CLIENT) || defined(SH_STANDALONE)
699 int modnum;
700#endif
701#if defined(SH_WITH_SERVER)
702 extern int sh_socket_remove (void);
703#endif
704
705 SL_ENTER(_("exit_handler"));
706
707#if defined(SH_WITH_SERVER)
708 sh_socket_remove ();
709#endif
710
711#if defined(SH_WITH_CLIENT) || defined(SH_STANDALONE)
712 for (modnum = 0; modList[modnum].name != NULL; ++modnum)
713 {
714 if (modList[modnum].initval == SH_MOD_ACTIVE)
715 (void) modList[modnum].mod_cleanup();
716 }
717#ifdef HAVE_PTHREAD
718 sh_pthread_cancel_all();
719#endif
720#endif
721
722 /* --- Push out all pending messages. ---
723 */
724#if defined(SH_WITH_MAIL)
725 if (sh.mailNum.alarm_last > 0)
726 {
727 (void) sh_nmail_flush ();
728 }
729#endif
730
731 /* --- Write the server stat. ---
732 */
733#if defined(SH_WITH_SERVER)
734 sh_forward_html_write();
735#endif
736
737 /* --- Clean up memory to check for problems. ---
738 */
739#ifdef MEM_DEBUG
740#if defined(SH_WITH_CLIENT) || defined(SH_STANDALONE)
741 sh_files_deldirstack ();
742 sh_files_delfilestack ();
743 sh_hash_hashdelete();
744 sh_files_hle_reg (NULL);
745#endif
746#if defined(SH_WITH_SERVER)
747 sh_forward_free_all ();
748#endif
749#if defined(SH_WITH_MAIL)
750 sh_nmail_free();
751#endif
752 delete_cache();
753 sh_mem_stat();
754#endif
755
756#ifdef MEM_DEBUG
757 sh_unix_count_mlock();
758#endif
759
760 /* --- Checksum of executable. ---
761 */
762 (void) sh_unix_self_check();
763
764
765 /* --- Exit Message. ---
766 */
767 sh_error_handle ((-1), FIL__, __LINE__, sh.flag.exit, MSG_EXIT_NORMAL,
768 sh.prg_name, sh_sig_msg);
769#ifdef SH_USE_XML
770 (void) sh_log_file (NULL, NULL);
771#endif
772
773
774 /* --- Restrict error logging to stderr. ---
775 */
776#ifdef WITH_MESSAGE_QUEUE
777 close_ipc ();
778#endif
779 sh_error_only_stderr (S_TRUE);
780
781
782 /* --- Remove lock, delete critical information. ---
783 */
784 (void) sh_unix_rm_lock_file (sh.srvlog.name);
785 if (sh.flag.isdaemon == S_TRUE)
786 (void) sh_unix_rm_pid_file ();
787 if (skey != NULL)
788 memset (skey, (int) '\0', sizeof(sh_key_t));
789
790 /* --- Exit. ---
791 */
792 SL_RET0(_("exit_handler"));
793}
794
795/***********************************************************
796 *
797 */
798#ifndef SIGHUP
799#define SIGHUP 1
800#endif
801#ifndef SIGTERM
802#define SIGTERM 15
803#endif
804#ifndef SIGKILL
805#define SIGKILL 9
806#endif
807
808#if defined(__linux__) || defined(sun) || defined(__sun) || defined(__sun__)
809#include <dirent.h>
810static pid_t * procdirSamhain (void)
811{
812 pid_t * pidlist;
813 struct dirent * d;
814 DIR * dp;
815 long ino;
816 struct stat buf;
817 int i;
818 pid_t pid, mypid = getpid();
819 char * tail;
820 char exef[128];
821
822 if (0 != stat(SH_INSTALL_PATH, &buf))
823 {
824 return NULL;
825 }
826
827 ino = (long) buf.st_ino;
828
829 if (NULL == (dp = opendir(_("/proc"))))
830 {
831 return NULL;
832 }
833
834 SH_MUTEX_LOCK(mutex_readdir);
835
836 pidlist = malloc(sizeof(pid_t) * 65535);
837 if (!pidlist)
838 goto unlock_and_out;
839
840 for (i = 0; i < 65535; ++i) pidlist[i] = 0;
841
842 i = 0;
843 while (NULL != (d = readdir(dp)) && i < 65535)
844 {
845 if (0 != strcmp(d->d_name, ".") && 0 != strcmp(d->d_name, ".."))
846 {
847 errno = 0;
848 pid = (pid_t) strtol (d->d_name, &tail, 0);
849 if (*tail != '\0' || errno != 0)
850 continue;
851 if (pid == mypid)
852 continue;
853#if defined(__linux__)
854 sprintf(exef, _("/proc/%d/exe"), (int) pid); /* known to fit */
855#else
856 sprintf(exef, _("/proc/%d/object/a.out"), /* known to fit */
857 (int) pid);
858#endif
859 if (0 == stat(exef, &buf) && ino == (long) buf.st_ino)
860 { pidlist[i] = (pid_t) pid; ++i; }
861 }
862 }
863
864 unlock_and_out:
865 ;
866 SH_MUTEX_UNLOCK(mutex_readdir);
867
868 closedir(dp);
869 return pidlist;
870}
871#else
872static pid_t * procdirSamhain (void)
873{
874 return NULL;
875}
876#endif
877
878static int killprocSamhain (pid_t pid)
879{
880 int i;
881
882 /* fprintf(stderr, "Killing %d\n", pid); */
883 if (pid > 0 && 0 == kill (pid, SIGTERM))
884 {
885 for (i = 0; i < 16; ++i)
886 {
887 (void) retry_msleep(1, 0);
888 if (0 != kill (pid, 0) && errno == ESRCH)
889 return (0);
890 }
891
892 (void) kill (pid, SIGKILL);
893 return (0);
894 }
895 if (pid > 0)
896 {
897 if (errno == ESRCH)
898 return 7;
899 if (errno == EPERM)
900 return 4;
901 return 1;
902 }
903 else
904 return (7);
905}
906
907static pid_t pidofSamhain (int flag)
908{
909 FILE * fp;
910 char line[256];
911 char * tail;
912 char * p;
913 pid_t pid;
914 long inpid;
915 struct stat buf;
916
917 fp = fopen (DEFAULT_ERRLOCK, "r");
918
919 if (!fp)
920 { if (errno != ENOENT) perror(_("fopen")); return 0; }
921 if (NULL == fgets(line, sizeof(line), fp))
922 { perror(_("fgets")); (void) fclose(fp); return 0; }
923 (void) fclose(fp);
924 p = line;
925 while (*p == ' ' || *p == '\f' || *p == '\n' ||
926 *p == '\r' || *p == '\t' || *p == '\v')
927 ++p;
928 errno = 0;
929 inpid = strtol (p, &tail, 0);
930 if (p == tail || errno != 0)
931 { perror(_("strtol")); return 0; }
932
933 pid = (pid_t) inpid;
934 if (inpid != (long) pid)
935 { perror(_("strtol")); return 0; }
936
937 /* remove stale pid file
938 */
939 if (flag == 1 && pid > 0 && 0 != kill(pid, 0) && errno == ESRCH)
940 {
941 if /*@-unrecog@*/ (0 == lstat (DEFAULT_ERRLOCK, &buf))/*@+unrecog@*/
942 {
943 if /*@-usedef@*/(S_ISREG(buf.st_mode))/*@+usedef@*/
944 {
945 (void) unlink(DEFAULT_ERRLOCK);
946 }
947 }
948 else
949 {
950 perror(_("lstat")); return 0;
951 }
952 pid = 0;
953 }
954 return pid;
955}
956
957/* 1: start 2:stop 3:reload 4:status
958 */
959/*@-exitarg@*/
960static int samhainctl(int ctl, int * argc, char * argv[])
961{
962 char * fullpath;
963 pid_t pid;
964 int status;
965 int res;
966 pid_t respid;
967 int times;
968 char * argp[32];
969 pid_t * pidlist;
970 int i;
971
972
973 fullpath = strdup (SH_INSTALL_PATH);
974 if (fullpath == NULL)
975 { perror(_("strdup")); exit (1); }
976
977 argp[0] = strdup (SH_INSTALL_PATH);
978 if (argp[0] == NULL)
979 { perror(_("strdup")); exit (1); }
980
981 for (times = 1; times < 32; ++times) argp[times] = NULL;
982
983 res = (*argc > 32) ? 32 : *argc;
984
985 for (times = 2; times < res; ++times)
986 {
987 argp[times-1] = strdup (argv[times]);
988 if (argp[times-1] == NULL)
989 { perror(_("strdup")); exit (1); }
990 }
991
992 if (ctl == 1)
993 {
994 pid = pidofSamhain(1);
995
996 if (pid != 0 && 0 == kill (pid, 0)) /* already started */
997 exit (0);
998
999 pid = fork();
1000 switch (pid) {
1001 case ((pid_t) -1):
1002 perror(_("fork"));
1003 exit (1);
1004 case 0:
1005 if (0 != close (0))
1006 {
1007 _exit(4);
1008 }
1009 (void) execv(fullpath, argp); /* flawfinder: ignore *//* wtf? */
1010 if (errno == EPERM)
1011 _exit(4);
1012 else if (errno == ENOENT)
1013 _exit(5);
1014 _exit (1);
1015 default:
1016 times = 0;
1017 while (times < 300) {
1018 respid = waitpid(pid, &status, WNOHANG|WUNTRACED);
1019 if ((pid_t)-1 == respid)
1020 {
1021 perror(_("waitpid"));
1022 exit (1);
1023 }
1024 else if (pid == respid)
1025 {
1026#ifndef USE_UNO
1027 if (0 != WIFEXITED(status))
1028 {
1029 res = WEXITSTATUS(status);
1030 exit (res == 0 ? 0 : res );
1031 }
1032 else
1033 exit (1);
1034#else
1035 exit (1);
1036#endif
1037 }
1038 ++times;
1039 (void) retry_msleep(1, 0);
1040 }
1041 exit (0); /* assume that it runs ok */
1042 }
1043 }
1044
1045 pid = pidofSamhain(0);
1046
1047 if (ctl == 2) /* stop */
1048 {
1049 pidlist = procdirSamhain ();
1050 if (pid == 0 && NULL == pidlist) /* pid file not found */
1051 {
1052 free(fullpath);
1053 return (0);
1054 }
1055
1056 status = 0;
1057 if (pid != 0)
1058 status = killprocSamhain(pid);
1059 if (pidlist != NULL)
1060 {
1061 i = 0;
1062 while (i < 65535 && pidlist[i] != 0)
1063 {
1064 if (pidlist[i] != pid)
1065 status = killprocSamhain(pidlist[i]);
1066 ++i;
1067 }
1068 }
1069 free(fullpath);
1070 if (status == 7)
1071 return 0;
1072 else
1073 return status;
1074 }
1075
1076 if (ctl == 3) /* reload */
1077 {
1078 if (pid == 0)
1079 exit (7);
1080 if (0 == kill (pid, SIGHUP))
1081 exit (0);
1082 else
1083 {
1084 if (errno == EPERM)
1085 exit (4);
1086 if (errno == ESRCH)
1087 exit (7);
1088 exit (1);
1089 }
1090 }
1091
1092 if (ctl == 4) /* status */
1093 {
1094 if (pid == 0)
1095 exit (3);
1096 if (0 == kill (pid, 0))
1097 exit (0);
1098 else
1099 {
1100 if (errno == EPERM)
1101 exit (4);
1102 if (errno == ESRCH)
1103 exit (1);
1104 }
1105 }
1106 free(fullpath); /* silence smatch false positive */
1107 exit (1); /* no exit handler installed yet */
1108 /*@notreached@*/
1109 return (0);
1110}
1111/*@+exitarg@*/
1112
1113#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
1114#include "sh_schedule.h"
1115static sh_schedule_t * FileSchedOne = NULL;
1116static sh_schedule_t * FileSchedTwo = NULL;
1117
1118/* free a linked list of schedules
1119 */
1120static sh_schedule_t * free_sched (sh_schedule_t * isched)
1121{
1122 sh_schedule_t * current = isched;
1123 sh_schedule_t * next = NULL;
1124
1125 while (current != NULL)
1126 {
1127 next = current->next;
1128 SH_FREE(current);
1129 current = next;
1130 }
1131 return NULL;
1132}
1133
1134/* Add a new schedule to the linked list of schedules
1135 */
1136static sh_schedule_t * sh_set_schedule_int (const char * str,
1137 sh_schedule_t * FileSchedIn,
1138 /*@out@*/ int * status)
1139{
1140 sh_schedule_t * FileSched;
1141
1142 SL_ENTER(_("sh_set_schedule_int"));
1143
1144 if (0 == sl_strncmp(str, _("NULL"), 4))
1145 {
1146 (void) free_sched(FileSchedIn);
1147 FileSchedIn = NULL;
1148 *status = 0;
1149 return 0;
1150 }
1151
1152 FileSched = SH_ALLOC(sizeof(sh_schedule_t));
1153 *status = create_sched(str, FileSched);
1154 if (*status != 0)
1155 {
1156 SH_FREE(FileSched);
1157 FileSched = NULL;
1158 SL_RETURN(FileSchedIn , _("sh_set_schedule_int"));
1159 }
1160 FileSched->next = FileSchedIn;
1161 SL_RETURN(FileSched , _("sh_set_schedule_int"));
1162}
1163
1164/* Add a new schedule to the linked list FileSchedOne
1165 */
1166int sh_set_schedule_one (const char * str)
1167{
1168 int status;
1169 FileSchedOne = sh_set_schedule_int (str, FileSchedOne, &status);
1170 return status;
1171}
1172
1173/* Add a new schedule to the linked list FileSchedTwo
1174 */
1175int sh_set_schedule_two (const char * str)
1176{
1177 int status;
1178 FileSchedTwo = sh_set_schedule_int (str, FileSchedTwo, &status);
1179 return status;
1180}
1181
1182#endif
1183
1184/*******************************************************
1185 *
1186 * Main program
1187 *
1188 *******************************************************/
1189#if !defined(SH_CUTEST)
1190int main(int argc, char * argv[])
1191#else
1192int undef_main(int argc, char * argv[])
1193#endif
1194{
1195#if defined(INET_SYSLOG)
1196 extern int create_syslog_socket (int flag);
1197#endif
1198#if defined(SH_WITH_SERVER)
1199 extern int sh_create_tcp_socket(void);
1200#endif
1201
1202#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
1203 int modnum;
1204 time_t runtim;
1205 float st_1, st_2;
1206 int status;
1207 volatile long cct = 0; /* main loop iterations */
1208
1209 volatile int flag_check_1 = 0;
1210 volatile int flag_check_2 = 0;
1211
1212 int check_done = 0;
1213#endif
1214
1215 volatile time_t told;
1216 volatile time_t tcurrent;
1217 size_t tzlen;
1218 char * tzptr;
1219 int res;
1220
1221#if defined (SH_STEALTH_NOCL)
1222 char command_line[256];
1223 int my_argc = 0;
1224 char * my_argv[32];
1225#endif
1226
1227#if !defined(USE_SYSTEM_MALLOC)
1228 typedef void assert_handler_tp(const char * error, const char *file, int line);
1229 extern assert_handler_tp *dnmalloc_set_handler(assert_handler_tp *new);
1230 (void) dnmalloc_set_handler(safe_fatal);
1231#endif
1232
1233 SH_G_INIT; /* Must precede any use of _() */
1234
1235 SL_ENTER(_("main"));
1236
1237 /* --- Close all but first three file descriptors. ---
1238 */
1239 sh_unix_closeall(3, -1, SL_FALSE); /* at program start */
1240
1241
1242 if (argc >= 2 && 0 != getuid() &&
1243 (0 == strcmp(argv[1], _("start")) ||
1244 0 == strcmp(argv[1], _("stop")) ||
1245 0 == strcmp(argv[1], _("reload")) ||
1246 0 == strcmp(argv[1], _("force-reload")) ||
1247 0 == strcmp(argv[1], _("status")) ||
1248 0 == strcmp(argv[1], _("restart"))))
1249 {
1250 return 4;
1251 }
1252
1253 if (argc >= 2 && 0 == getuid())
1254 {
1255 /* return codes:
1256 * 0 Success
1257 * 1 Can not send signal / start program
1258 * 2 Pid file does not exist
1259 */
1260 if (0 == strcmp(argv[1], _("start")))
1261 {
1262 (void) samhainctl (1, &argc, argv); /* does not return */
1263 }
1264 else if (0 == strcmp(argv[1], _("stop")))
1265 return (samhainctl (2, &argc, argv));
1266 else if (0 == strcmp(argv[1], _("reload")))
1267 (void) samhainctl (3, &argc, argv); /* does not return */
1268 else if (0 == strcmp(argv[1], _("force-reload")))
1269 (void) samhainctl (3, &argc, argv); /* does not return */
1270 else if (0 == strcmp(argv[1], _("status")))
1271 (void) samhainctl (4, &argc, argv); /* does not return */
1272 else if (0 == strcmp(argv[1], _("restart")))
1273 {
1274 res = samhainctl (2, &argc, argv);
1275 if (res == 0 || res == 7)
1276 {
1277 (void) samhainctl (1, &argc, argv); /* does not return */
1278 }
1279 else
1280 return (res);
1281 }
1282 }
1283
1284 /* if fd 0 is closed, presume that we want to be daemon and
1285 * run in check mode
1286 */
1287 if ((-1) == retry_fcntl(FIL__, __LINE__, 0, F_GETFL, 0) &&
1288 errno == EBADF)
1289 {
1290 sh.flag.opts = S_TRUE;
1291 (void) sh_unix_setdeamon(NULL);
1292#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
1293 sh.flag.checkSum = SH_CHECK_CHECK;
1294 /* (void) sh_util_setchecksum(_("check")); */
1295#endif
1296 is_samhainctl_init = S_TRUE;
1297 sh.flag.opts = S_FALSE;
1298 }
1299
1300
1301 /* --- Install the exit handler. ---
1302 */
1303 (void) atexit(exit_handler);
1304
1305 /* --- Zero the mailer key, and fill it. ---
1306 */
1307 memset (ErrFlag, 0, 2*sizeof(UINT32));
1308
1309#ifdef MKA_01
1310 ErrFlag[0] |= (1 << 0);
1311#endif
1312#ifdef MKA_02
1313 ErrFlag[0] |= (1 << 1);
1314#endif
1315#ifdef MKA_03
1316 ErrFlag[0] |= (1 << 2);
1317#endif
1318#ifdef MKA_04
1319 ErrFlag[0] |= (1 << 3);
1320#endif
1321#ifdef MKA_05
1322 ErrFlag[0] |= (1 << 4);
1323#endif
1324#ifdef MKA_06
1325 ErrFlag[0] |= (1 << 5);
1326#endif
1327#ifdef MKA_07
1328 ErrFlag[0] |= (1 << 6);
1329#endif
1330#ifdef MKA_08
1331 ErrFlag[0] |= (1 << 7);
1332#endif
1333
1334#if defined(SCREW_IT_UP)
1335 BREAKEXIT(sh_sigtrap_prepare);
1336 (void) sh_sigtrap_prepare();
1337#endif
1338
1339 /* Save the timezone.
1340 */
1341 if (NULL != (tzptr = getenv("TZ"))) /* flawfinder: ignore */
1342 {
1343 tzlen = strlen(tzptr);
1344 if (tzlen < 1024)
1345 {
1346 sh.timezone = malloc (tzlen + 1);
1347 if (sh.timezone != NULL)
1348 (void) sl_strlcpy (sh.timezone, tzptr, tzlen + 1);
1349 }
1350 else
1351 sh.timezone = NULL;
1352 }
1353 else
1354 sh.timezone = NULL;
1355
1356
1357 /* -------- INIT --------
1358 */
1359
1360 /* Restrict error logging to stderr.
1361 */
1362 sh_error_only_stderr (S_TRUE);
1363
1364 BREAKEXIT(sh_derr);
1365 (void) sh_derr();
1366
1367 /* Check that first three descriptors are open.
1368 */
1369 if ( retry_fcntl(FIL__, __LINE__, 0, F_GETFL, 0) == (-1))
1370 (void) aud_open(FIL__, __LINE__, SL_NOPRIV, _("/dev/null"), O_RDWR, 0);
1371 if ( retry_fcntl(FIL__, __LINE__, 1, F_GETFL, 0) == (-1))
1372 (void) aud_open(FIL__, __LINE__, SL_NOPRIV, _("/dev/null"), O_RDWR, 1);
1373 if ( retry_fcntl(FIL__, __LINE__, 2, F_GETFL, 0) == (-1))
1374 (void) aud_open(FIL__, __LINE__, SL_NOPRIV, _("/dev/null"), O_RDWR, 2);
1375
1376 /* --- Set default values. ---
1377 */
1378 BREAKEXIT(sh_init);
1379 sh_init (); /* we are still privileged here, so we can mlock skey */
1380#if (defined (SH_WITH_SERVER) && !defined (SH_WITH_CLIENT))
1381 sh.flag.isserver = S_TRUE;
1382#endif
1383
1384 /* --- Get local hostname. ---
1385 */
1386 BREAKEXIT(sh_unix_localhost);
1387 sh_unix_localhost();
1388
1389 /* --- Read the command line. ---
1390 */
1391 sh.flag.opts = S_TRUE;
1392
1393#if !defined(SH_STEALTH_NOCL)
1394 sh_argc_store = argc;
1395 sh_argv_store = argv;
1396 (void) sh_getopt_get (argc, argv);
1397#else
1398 if (argc > 1 && argv[1] != NULL &&
1399 strlen(argv[1]) > 0 && strlen(NOCL_CODE) > 0)
1400 {
1401 if ( 0 == strcmp(argv[1], NOCL_CODE) )
1402 {
1403#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1404 char * saveptr;
1405#endif
1406 my_argv[0] = argv[0]; ++my_argc;
1407 command_line[0] = '\0';
1408 if (NULL != fgets (command_line, sizeof(command_line), stdin))
1409 command_line[sizeof(command_line)-1] = '\0';
1410
1411 do {
1412#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1413 my_argv[my_argc] =
1414 strtok_r( (my_argc == 1) ? command_line : NULL, " \n", &saveptr);
1415#else
1416 my_argv[my_argc] =
1417 strtok( (my_argc == 1) ? command_line : NULL, " \n");
1418#endif
1419 if (my_argv[my_argc] != NULL) {
1420 ++my_argc;
1421 } else {
1422 break;
1423 }
1424 } while (my_argc < 32);
1425
1426 sh_argc_store = my_argc;
1427 sh_argv_store = my_argv;
1428
1429 (void) sh_getopt_get (my_argc, my_argv);
1430 }
1431 else
1432 {
1433 /* discard command line */
1434 /* _exit(EXIT_FAILURE) */ ;
1435 }
1436 }
1437#endif
1438 sh.flag.opts = S_FALSE;
1439
1440
1441 /* --- Get user info. ---
1442 */
1443 TPT((0, FIL__, __LINE__, _("msg=<Get user name.>\n")))
1444 if (0 != sh_unix_getUser ())
1445 {
1446 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_EXIT_ABORT1,
1447 sh.prg_name);
1448 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1449 }
1450
1451
1452 /* *****************************
1453 *
1454 * Read the configuration file.
1455 *
1456 * *****************************/
1457
1458 TPT((0, FIL__, __LINE__, _("msg=<Read the configuration file.>\n")))
1459 BREAKEXIT(sh_readconf_read);
1460 (void) sh_readconf_read ();
1461
1462#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
1463 if (sh.flag.checkSum == SH_CHECK_NONE)
1464 {
1465 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_SUBGEN,
1466 _("No action specified: init, update, or check"),
1467 _("main"));
1468 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_EXIT_ABORT1,
1469 sh.prg_name);
1470 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
1471 }
1472#endif
1473
1474 /* do not append to database if run SUID
1475 */
1476 if ((sh.flag.checkSum == SH_CHECK_INIT) && (0 != sl_is_suid()))
1477 {
1478 (void) dlog(1, FIL__, __LINE__,
1479 _("Cannot initialize database when running with SUID credentials.\nYou need to run this with the user ID %d.\nYour current user ID is %d."),
1480 (int) geteuid(), (int) sh.real.uid);
1481 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_ACCESS,
1482 (long) sh.real.uid, sh.data.path);
1483 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1484 }
1485
1486 /* avoid daemon mode for initialization
1487 */
1488 if (sh.flag.checkSum == SH_CHECK_INIT)
1489 {
1490 sh.flag.isdaemon = S_FALSE;
1491 sh.flag.loop = S_FALSE;
1492 }
1493
1494 /* --- load database; checksum of database
1495 */
1496#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
1497 TPT((0, FIL__, __LINE__, _("msg=<Get checksum of the database.>\n")))
1498 if (sh.flag.checkSum == SH_CHECK_CHECK)
1499 {
1500 if (0 != sl_strcmp(file_path('D', 'R'), _("REQ_FROM_SERVER")))
1501 {
1502 char hashbuf[KEYBUF_SIZE];
1503 (void) sl_strlcpy(sh.data.hash,
1504 sh_tiger_hash (file_path('D', 'R'),
1505 TIGER_FILE, TIGER_NOLIM,
1506 hashbuf, sizeof(hashbuf)),
1507 KEY_LEN+1);
1508 }
1509
1510 /* this eventually fetches the file from server to get checksum
1511 */
1512 sh_hash_init ();
1513 }
1514#endif
1515
1516 /* --- initialize signal handling etc.; fork daemon
1517 */
1518 if (sh_unix_init(sh.flag.isdaemon) == -1)
1519 {
1520 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_EXIT_ABORT1,
1521 sh.prg_name);
1522 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1523 }
1524
1525 /* --- drop privileges eventually ---
1526 */
1527#if defined(SH_WITH_SERVER)
1528 sh_create_tcp_socket ();
1529#if defined(INET_SYSLOG)
1530 create_syslog_socket (S_TRUE);
1531#endif
1532 SL_REQUIRE(sl_policy_get_real(DEFAULT_IDENT) == SL_ENONE,
1533 _("sl_policy_get_real(DEFAULT_IDENT) == SL_ENONE"));
1534#else
1535 SL_REQUIRE(sl_policy_get_user(DEFAULT_IDENT) == SL_ENONE,
1536 _("sl_policy_get_user(DEFAULT_IDENT) == SL_ENONE"));
1537#endif
1538
1539 /* --- Get user info (again). ---
1540 */
1541 TPT((0, FIL__, __LINE__, _("msg=<Get user name.>\n")))
1542 if (0 != sh_unix_getUser ())
1543 {
1544 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_EXIT_ABORT1,
1545 sh.prg_name);
1546 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1547 }
1548
1549 /* --- now check whether we really wanted it; if not, close ---
1550 */
1551#if defined(INET_SYSLOG) && defined(SH_WITH_SERVER)
1552 create_syslog_socket (S_FALSE);
1553#endif
1554
1555
1556 /* --- Enable full error logging ---
1557 */
1558 sh_error_only_stderr (S_FALSE);
1559
1560 /****************************************************
1561 *
1562 * SERVER
1563 *
1564 ****************************************************/
1565
1566#if defined(SH_WITH_SERVER) && !defined(SH_WITH_CLIENT)
1567
1568#if (defined(WITH_GPG) || defined(WITH_PGP))
1569 /* log startup */
1570 sh_gpg_log_startup ();
1571#else
1572 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_START_1H,
1573 sh.prg_name, (long) sh.real.uid,
1574 (sh.flag.hidefile == S_TRUE) ?
1575 _("(hidden)") : file_path('C','R'),
1576 sh.conf.hash);
1577#endif
1578
1579#else
1580
1581 /****************************************************
1582 *
1583 * CLIENT/STANDALONE
1584 *
1585 ****************************************************/
1586
1587 BREAKEXIT(sh_error_handle);
1588
1589 if (sh.flag.checkSum == SH_CHECK_CHECK)
1590 {
1591#if (defined(WITH_GPG) || defined(WITH_PGP))
1592 /* log startup */
1593 sh_gpg_log_startup ();
1594#else
1595 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_START_2H,
1596 sh.prg_name, (long) sh.real.uid,
1597 (sh.flag.hidefile == S_TRUE) ? _("(hidden)") : file_path('C', 'R'), sh.conf.hash,
1598 (sh.flag.hidefile == S_TRUE) ? _("(hidden)") : file_path('D', 'R'), sh.data.hash);
1599#endif
1600 }
1601 else
1602 {
1603#if (defined(WITH_GPG) || defined(WITH_PGP))
1604 /* log startup */
1605 sh_gpg_log_startup ();
1606#else
1607 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_START_1H,
1608 sh.prg_name, (long) sh.real.uid,
1609 (sh.flag.hidefile == S_TRUE) ? _("(hidden)") : file_path('C', 'R'), sh.conf.hash);
1610#endif
1611 }
1612#endif
1613
1614
1615 if ((skey == NULL) || (skey->mlock_failed == SL_TRUE))
1616 sh_error_handle ((-1), FIL__, __LINE__, EPERM, MSG_MLOCK);
1617
1618 /* timer
1619 */
1620 tcurrent = time (NULL);
1621 told = tcurrent;
1622 sh.mailTime.alarm_last = told;
1623
1624
1625 /****************************************************
1626 *
1627 * SERVER
1628 *
1629 ****************************************************/
1630
1631#if defined(SH_WITH_SERVER)
1632 TPT((0, FIL__, __LINE__, _("msg=<Start server.>\n")))
1633
1634#if defined (SH_WITH_CLIENT)
1635 if (sh.flag.isserver == S_TRUE)
1636 {
1637 sh_receive();
1638 TPT((0, FIL__, __LINE__, _("msg=<End server.>\n")))
1639 aud_exit (FIL__, __LINE__, EXIT_SUCCESS);
1640 }
1641#else
1642 sh_receive();
1643 TPT((0, FIL__, __LINE__, _("msg=<End server.>\n")))
1644 aud_exit (FIL__, __LINE__, EXIT_SUCCESS);
1645#endif
1646
1647#endif
1648
1649 /****************************************************
1650 *
1651 * CLIENT/STANDALONE
1652 *
1653 ****************************************************/
1654#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
1655
1656
1657 /* --- Initialize modules. ---
1658 */
1659 TPT((0, FIL__, __LINE__, _("msg=<Initialize modules.>\n")))
1660 for (modnum = 0; modList[modnum].name != NULL; ++modnum)
1661 {
1662 status = modList[modnum].mod_init(&(modList[modnum]));
1663 if ( status < 0 )
1664 {
1665 if (status == (-1)) {
1666 sh_error_handle (SH_ERR_NOTICE, FIL__, __LINE__, status,
1667 MSG_MOD_FAIL,
1668 _(modList[modnum].name),
1669 status+SH_MOD_OFFSET);
1670 } else {
1671 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_MOD_FAIL,
1672 _(modList[modnum].name),
1673 status+SH_MOD_OFFSET);
1674 }
1675 modList[modnum].initval = SH_MOD_FAILED;
1676 }
1677 else
1678 {
1679 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_MOD_OK,
1680 _(modList[modnum].name));
1681 modList[modnum].initval = status;
1682 }
1683 }
1684
1685 /* -------- TEST SETUP ---------
1686 */
1687 (void) sh_files_setrec();
1688 (void) sh_files_test_setup();
1689
1690
1691 /* -------- NICE LEVEL ---------
1692 */
1693 if (0 != sh.flag.nice)
1694 {
1695#ifdef HAVE_SETPRIORITY
1696 /*@-unrecog@*/
1697 (void) setpriority(PRIO_PROCESS, 0, sh.flag.nice);
1698 /*@+unrecog@*/
1699#else
1700 (void) nice(sh.flag.nice);
1701#endif
1702 }
1703
1704 /* -------- MAIN LOOP ---------
1705 */
1706 sh.statistics.bytes_speed = 0;
1707 sh.statistics.bytes_hashed = 0;
1708
1709 while (1 == 1)
1710 {
1711 ++cct;
1712
1713 BREAKEXIT(sh_error_handle);
1714
1715 TPT((0, FIL__, __LINE__, _("msg=<Start main loop.>, iter=<%ld>\n"), cct))
1716
1717 tcurrent = time (NULL);
1718
1719 if (sig_raised > 0)
1720 {
1721
1722 TPT((0, FIL__, __LINE__, _("msg=<Process a signal.>\n")))
1723
1724 if (sig_termfast == 1) /* SIGTERM */
1725 {
1726 TPT((0, FIL__, __LINE__, _("msg=<Terminate.>\n")));
1727 /* strncpy (sh_sig_msg, _("SIGTERM"), 20); */
1728 --sig_raised; --sig_urgent;
1729 aud_exit (FIL__, __LINE__, EXIT_SUCCESS);
1730 }
1731
1732 if (sig_force_check == 1) /* SIGTTOU */
1733 {
1734 TPT((0, FIL__, __LINE__, _("msg=<Check run triggered.>\n")));
1735 flag_check_1 = 1;
1736 flag_check_2 = 1;
1737 sig_force_check = 0;
1738 --sig_raised;
1739 }
1740
1741 if (sig_config_read_again == 1 && /* SIGHUP */
1742 sh_global_suspend_flag == 0)
1743 {
1744 TPT((0, FIL__, __LINE__, _("msg=<Re-read configuration.>\n")))
1745 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_RECONF);
1746
1747 sh_thread_pause_flag = S_TRUE;
1748
1749#if defined(WITH_EXTERNAL)
1750 /* delete list of external tasks
1751 */
1752 (void) sh_ext_cleanup();
1753#endif
1754#if defined(SH_WITH_MAIL)
1755 sh_nmail_free();
1756#endif
1757
1758 /* delete the file list, make all database
1759 * entries visible (allignore = FALSE)
1760 */
1761 (void) sh_files_deldirstack ();
1762 (void) sh_files_delfilestack ();
1763 (void) sh_ignore_clean ();
1764 (void) hash_full_tree ();
1765
1766#if defined(SH_WITH_CLIENT)
1767 reset_count_dev_server();
1768#endif
1769#if defined(SH_WITH_CLIENT) || defined(SH_STANDALONE)
1770
1771
1772 FileSchedOne = free_sched(FileSchedOne);
1773 FileSchedTwo = free_sched(FileSchedTwo);
1774
1775 for (modnum = 0; modList[modnum].name != NULL; ++modnum)
1776 {
1777 /* sh_thread_pause_flag is true, and we block in lock
1778 * until check has returned, so we are sure check will
1779 * not run until sh_thread_pause_flag is set to false
1780 */
1781 /* if (modList[modnum].initval >= SH_MOD_ACTIVE) */
1782 (void) modList[modnum].mod_reconf();
1783 }
1784#endif
1785
1786 reset_count_dev_console();
1787 reset_count_dev_time();
1788
1789 (void) sh_unix_maskreset();
1790
1791 /* Should this be included ???
1792 * (i.e. should we reload the database ?)
1793 */
1794#ifdef RELOAD_DATABASE
1795 sh_hash_hashdelete();
1796#endif
1797 (void) sl_trust_purge_user();
1798 (void) sh_files_hle_reg (NULL);
1799 (void) sh_prelink_run (NULL, NULL, 0);
1800
1801 /* --------------------------
1802 * --- READ CONFIGURATION ---
1803 * --------------------------
1804 */
1805 (void) sh_readconf_read ();
1806 sig_config_read_again = 0;
1807 (void) sh_files_setrec();
1808 (void) sh_files_test_setup();
1809 if (0 != sh.flag.nice)
1810 {
1811#ifdef HAVE_SETPRIORITY
1812 setpriority(PRIO_PROCESS, 0, sh.flag.nice);
1813#else
1814 nice(sh.flag.nice);
1815#endif
1816 }
1817
1818 if (sh.flag.checkSum == SH_CHECK_INIT)
1819 {
1820 sh.flag.isdaemon = S_FALSE;
1821 sh.flag.loop = S_FALSE;
1822 }
1823
1824
1825 /* --- Initialize modules. ---
1826 */
1827 TPT((0, FIL__, __LINE__, _("msg=<Initialize modules.>\n")));
1828 for (modnum = 0; modList[modnum].name != NULL; ++modnum)
1829 {
1830 status = modList[modnum].mod_init(&(modList[modnum]));
1831
1832 if (status < 0)
1833 {
1834 if (status == (-1)) {
1835 sh_error_handle (SH_ERR_NOTICE, FIL__, __LINE__,
1836 status, MSG_MOD_FAIL,
1837 _(modList[modnum].name),
1838 status+SH_MOD_OFFSET);
1839 } else {
1840 sh_error_handle ((-1), FIL__, __LINE__,
1841 status, MSG_MOD_FAIL,
1842 _(modList[modnum].name),
1843 status+SH_MOD_OFFSET);
1844 }
1845 modList[modnum].initval = SH_MOD_FAILED;
1846 }
1847 else
1848 {
1849 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_MOD_OK,
1850 _(modList[modnum].name));
1851 modList[modnum].initval = status;
1852 }
1853 }
1854
1855 /* module is properly set up now
1856 */
1857 sh_thread_pause_flag = S_FALSE;
1858
1859 --sig_raised;
1860 }
1861
1862 if (sig_fresh_trail == 1) /* SIGIOT */
1863 {
1864 if (sh_global_suspend_flag == 0)
1865 {
1866 SH_MUTEX_LOCK(mutex_thread_nolog);
1867
1868 /* Logfile access
1869 */
1870#ifdef SH_USE_XML
1871 (void) sh_log_file (NULL, NULL);
1872#endif
1873 TPT((0, FIL__, __LINE__, _("msg=<Logfile stop/restart.>\n")));
1874 sh_error_only_stderr (S_TRUE);
1875 (void) sh_unix_rm_lock_file(sh.srvlog.name);
1876 (void) retry_msleep(3, 0);
1877 sh.flag.log_start = S_TRUE;
1878 sh_error_only_stderr (S_FALSE);
1879 sh_thread_pause_flag = S_FALSE;
1880 sig_fresh_trail = 0;
1881 --sig_raised;
1882 SH_MUTEX_UNLOCK(mutex_thread_nolog);
1883 }
1884 }
1885
1886 if (sig_terminate == 1) /* SIGQUIT */
1887 {
1888 TPT((0, FIL__, __LINE__, _("msg=<Terminate.>\n")));
1889 strncpy (sh_sig_msg, _("Quit"), 20);
1890 --sig_raised; --sig_urgent;
1891 aud_exit (FIL__, __LINE__, EXIT_SUCCESS);
1892 }
1893
1894 if (sig_debug_switch == 1) /* SIGUSR1 */
1895 {
1896 TPT((0, FIL__, __LINE__, _("msg=<Debug switch.>\n")));
1897 sh_error_dbg_switch();
1898 sig_debug_switch = 0;
1899 --sig_raised;
1900 }
1901
1902 if (sig_suspend_switch > 0) /* SIGUSR2 */
1903 {
1904 TPT((0, FIL__, __LINE__, _("msg=<Suspend switch.>\n")));
1905 if (sh_global_suspend_flag != 1) {
1906 SH_MUTEX_LOCK_UNSAFE(mutex_thread_nolog);
1907 sh_global_suspend_flag = 1;
1908 sh_error_handle((-1), FIL__, __LINE__, 0, MSG_SUSPEND,
1909 sh.prg_name);
1910 } else {
1911 sh_global_suspend_flag = 0;
1912 SH_MUTEX_UNLOCK_UNSAFE(mutex_thread_nolog);
1913 }
1914 --sig_suspend_switch;
1915 --sig_raised; --sig_urgent;
1916 }
1917 sig_raised = (sig_raised < 0) ? 0 : sig_raised;
1918 sig_urgent = (sig_urgent < 0) ? 0 : sig_urgent;
1919 TPT((0, FIL__, __LINE__, _("msg=<End signal processing.>\n")));
1920 }
1921
1922 if (sh_global_suspend_flag == 1)
1923 {
1924 (void) retry_msleep (1, 0);
1925 continue;
1926 }
1927
1928 /* see whether its time to check files
1929 */
1930 if (sh.flag.checkSum == SH_CHECK_INIT ||
1931 (sh.flag.checkSum == SH_CHECK_CHECK &&
1932 (sh.flag.isdaemon == S_FALSE && sh.flag.loop == S_FALSE)))
1933 {
1934 flag_check_1 = 1;
1935 if (FileSchedTwo != NULL)
1936 flag_check_2 = 1;
1937 }
1938 else if (sh.flag.checkSum == SH_CHECK_CHECK ||
1939 (sh.flag.update == S_TRUE &&
1940 (sh.flag.isdaemon == S_TRUE || sh.flag.loop == S_TRUE)))
1941 {
1942 if (FileSchedOne == NULL)
1943 {
1944 /* use interval if we have no schedule
1945 */
1946 if (tcurrent - sh.fileCheck.alarm_last >=
1947 sh.fileCheck.alarm_interval)
1948 flag_check_1 = 1;
1949 }
1950 else
1951 {
1952 flag_check_1 = test_sched(FileSchedOne);
1953 if (FileSchedTwo != NULL)
1954 flag_check_2 = test_sched(FileSchedTwo);
1955 if (flag_check_2 == 1)
1956 flag_check_1 = 1;
1957 }
1958 }
1959
1960 check_done = 0;
1961
1962 if (sh.flag.checkSum != SH_CHECK_NONE &&
1963 (flag_check_1 == 1 || flag_check_2 == 1))
1964 {
1965 /*
1966 * check directories and files
1967 * ORDER IS IMPORTANT -- DIRZ FIRST
1968 */
1969 sh.statistics.bytes_hashed = 0;
1970 sh.statistics.time_start = time (NULL);
1971 sh.statistics.dirs_checked = 0;
1972 sh.statistics.files_checked = 0;
1973
1974 TPT((0, FIL__, __LINE__, _("msg=<Check directories.>\n")))
1975 BREAKEXIT(sh_dirs_chk);
1976 if (flag_check_1 == 1)
1977 {
1978 (void) sh_dirs_chk (1);
1979#ifndef SH_PROFILE
1980 (void) retry_aud_chdir (FIL__, __LINE__, "/");
1981#endif
1982 }
1983 if (flag_check_2 == 1)
1984 {
1985 (void) sh_dirs_chk (2);
1986#ifndef SH_PROFILE
1987 (void) retry_aud_chdir (FIL__, __LINE__, "/");
1988#endif
1989 }
1990 TPT((0, FIL__, __LINE__, _("msg=<Check files.>\n")))
1991 BREAKEXIT(sh_files_chk);
1992 if (flag_check_1 == 1)
1993 (void) sh_files_chk ();
1994
1995 if (sig_urgent > 0)
1996 continue;
1997
1998 /*
1999 * check for files not visited
2000 */
2001 if (flag_check_2 == 1 || FileSchedTwo == NULL)
2002 {
2003 TPT((0, FIL__, __LINE__, _("msg=<Check for missing files.>\n")))
2004 sh_hash_unvisited (ShDFLevel[SH_ERR_T_FILE]);
2005 }
2006
2007 if (sig_urgent > 0)
2008 continue;
2009
2010 /* reset
2011 */
2012 TPT((0, FIL__, __LINE__, _("msg=<Reset status.>\n")))
2013 sh_dirs_reset ();
2014 if (sig_urgent > 0)
2015 continue;
2016
2017 sh_files_reset ();
2018 flag_check_1 = 0;
2019 flag_check_2 = 0;
2020 check_done = 1;
2021
2022 (void) sh_prelink_run (NULL, NULL, 0);
2023
2024 if (sig_urgent > 0)
2025 continue;
2026
2027 runtim = time(NULL) - sh.statistics.time_start;
2028 sh.statistics.time_check = runtim;
2029
2030 if ((sh.statistics.dirs_checked == 0) &&
2031 (sh.statistics.files_checked == 0))
2032 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_CHECK_0);
2033
2034 else
2035 {
2036 st_1 = (float) sh.statistics.bytes_hashed;
2037 st_2 = (float) runtim;
2038
2039
2040 if (st_1 > FLT_EPSILON && st_2 > FLT_EPSILON)
2041 st_1 = st_1/st_2;
2042 else if (st_1 > FLT_EPSILON)
2043 st_1 = (float) (st_1 * 1.0);
2044 else
2045 st_1 = 0.0;
2046
2047 sh.statistics.bytes_speed = (unsigned long) st_1;
2048
2049 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_CHECK_1,
2050 (long) runtim,
2051 0.001 * st_1);
2052 }
2053 sh.fileCheck.alarm_last = time (NULL);
2054
2055 if (sig_urgent > 0)
2056 continue;
2057
2058 /*
2059 * flush mail queue
2060 */
2061#if defined(SH_WITH_MAIL)
2062 TPT((0, FIL__, __LINE__, _("msg=<Flush mail queue.>\n")))
2063 (void) sh_nmail_flush ();
2064#endif
2065 }
2066
2067 if (sig_urgent > 0)
2068 continue;
2069
2070 /* execute modules
2071 */
2072 TPT((0, FIL__, __LINE__, _("msg=<Execute modules.>\n")))
2073 for (modnum = 0; modList[modnum].name != NULL; ++modnum)
2074 {
2075 if (modList[modnum].initval == SH_MOD_ACTIVE &&
2076 0 != modList[modnum].mod_timer(tcurrent))
2077 if (0 != (status = modList[modnum].mod_check()))
2078 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_MOD_EXEC,
2079 _(modList[modnum].name), (long) (status+SH_MOD_OFFSET));
2080 }
2081
2082 /* 27.05.2002 avoid empty database
2083 * 22.10.2002 moved here b/o suid check initialization
2084 */
2085 if (sh.flag.checkSum == SH_CHECK_INIT)
2086 sh_hash_pushdata (NULL, NULL);
2087
2088 /* write out database
2089 */
2090 if (sh.flag.checkSum == SH_CHECK_CHECK &&
2091 sh.flag.update == S_TRUE &&
2092 check_done == 1)
2093 sh_hash_writeout ();
2094
2095 /* no-op unless MEM_LOG is defined in sh_mem.c
2096 */
2097#ifdef MEM_DEBUG
2098 sh_mem_dump ();
2099#endif
2100
2101 /* no loop if not daemon
2102 */
2103 if (sh.flag.isdaemon != S_TRUE && sh.flag.loop == S_FALSE)
2104 break;
2105 if (sig_urgent > 0)
2106 continue;
2107
2108 /* see whether its time to send mail
2109 */
2110#if defined(SH_WITH_MAIL)
2111 if (tcurrent - sh.mailTime.alarm_last >= sh.mailTime.alarm_interval)
2112 {
2113 TPT((0, FIL__, __LINE__, _("msg=<Flush mail queue.>\n")))
2114 (void) sh_nmail_flush ();
2115 sh.mailTime.alarm_last = time (NULL);
2116 }
2117#endif
2118 if (sig_urgent > 0)
2119 continue;
2120
2121 /* log the timestamp
2122 */
2123 if ((int)(tcurrent - told) >= sh.looptime )
2124 {
2125 TPT((0, FIL__, __LINE__, _("msg=<Log the timestamp.>\n")))
2126 told = tcurrent;
2127#ifdef MEM_DEBUG
2128 sh_mem_check();
2129 sh_unix_count_mlock();
2130#else
2131 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_STAMP);
2132#endif
2133 }
2134
2135 /* seed / re-seed the PRNG if required
2136 */
2137 (void) taus_seed();
2138
2139 if (sig_urgent > 0)
2140 continue;
2141
2142 /* go to sleep
2143 */
2144 (void) retry_msleep (1, 0);
2145
2146 BREAKEXIT(sh_derr);
2147 (void) sh_derr();
2148 }
2149
2150 /* ------ END -----------
2151 */
2152
2153
2154
2155 /*
2156 * cleanup
2157 */
2158 TPT((0, FIL__, __LINE__, _("msg=<Cleanup.>\n")));
2159 sh_hash_hashdelete();
2160
2161#if defined(SH_WITH_MAIL)
2162 if (sh.mailNum.alarm_last > 0)
2163 (void)sh_nmail_flush ();
2164#endif
2165
2166 /* #if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE) */
2167#endif
2168
2169#if 0
2170 {
2171 char command[128];
2172 sprintf(command, "/bin/cat /proc/%d/status", (int) getpid());
2173 system(command); /* flawfinder: ignore *//* debug code */
2174 malloc_stats();
2175 }
2176#endif
2177
2178 aud_exit (FIL__, __LINE__, EXIT_SUCCESS);
2179 SL_RETURN(0, _("main"));
2180}
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