source: trunk/src/sh_unix.c@ 207

Last change on this file since 207 was 205, checked in by katerina, 16 years ago

New option LooseDirCheck (ticket #132). Also, replace _exit() with raise(SIGKILL).
File size: 116.2 KB
Line 
1/* SAMHAIN file system integrity testing */
2/* Copyright (C) 1999 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 <ctype.h>
27#ifdef HAVE_LINUX_FS_H
28#include <linux/fs.h>
29#endif
30
31#ifdef HAVE_MEMORY_H
32#include <memory.h>
33#endif
34
35#ifdef HAVE_UNISTD_H
36#include <errno.h>
37#include <signal.h>
38#include <pwd.h>
39#include <grp.h>
40#include <sys/types.h>
41#include <sys/stat.h>
42#include <sys/resource.h>
43#include <fcntl.h>
44#include <unistd.h>
45/* need to undef these, since the #define's may be picked up from
46 * linux/wait.h, and will clash with a typedef in sys/wait.h
47 */
48#undef P_ALL
49#undef P_PID
50#undef P_PGID
51#include <sys/wait.h>
52
53/*********************
54#ifdef HAVE_SYS_VFS_H
55#include <sys/vfs.h>
56#endif
57**********************/
58#endif
59
60#if TIME_WITH_SYS_TIME
61#include <sys/time.h>
62#include <time.h>
63#else
64#if HAVE_SYS_TIME_H
65#include <sys/time.h>
66#else
67#include <time.h>
68#endif
69#endif
70
71#ifdef HAVE_SYS_SELECT_H
72#include <sys/select.h>
73#endif
74
75#ifndef FD_SET
76#define NFDBITS 32
77#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
78#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
79#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
80#endif /* !FD_SET */
81#ifndef FD_SETSIZE
82#define FD_SETSIZE 32
83#endif
84#ifndef FD_ZERO
85#define FD_ZERO(p) memset((char *)(p), '\0', sizeof(*(p)))
86#endif
87
88
89#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
90#include <sys/mman.h>
91#endif
92
93#include "samhain.h"
94#include "sh_error.h"
95#include "sh_unix.h"
96#include "sh_utils.h"
97#include "sh_mem.h"
98#include "sh_hash.h"
99#include "sh_tools.h"
100#include "sh_tiger.h"
101#include "sh_prelink.h"
102#include "sh_pthread.h"
103
104/* moved here from far below
105 */
106#include <netdb.h>
107
108#define SH_NEED_PWD_GRP
109#define SH_NEED_GETHOSTBYXXX
110#include "sh_static.h"
111
112#ifndef HAVE_LSTAT
113#define lstat stat
114#endif
115
116#if defined(S_IFLNK) && !defined(S_ISLNK)
117#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
118#else
119#if !defined(S_ISLNK)
120#define S_ISLNK(mode) (0)
121#endif
122#endif
123
124#if defined(S_IFSOCK) && !defined(S_ISSOCK)
125#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
126#else
127#if !defined(S_ISSOCK)
128#define S_ISSOCK(mode) (0)
129#endif
130#endif
131
132#if defined(S_IFDOOR) && !defined(S_ISDOOR)
133#define S_ISDOOR(mode) (((mode) & S_IFMT) == S_IFDOOR)
134#else
135#if !defined(S_ISDOOR)
136#define S_ISDOOR(mode) (0)
137#endif
138#endif
139
140#if defined(S_IFPORT) && !defined(S_ISPORT)
141#define S_ISPORT(mode) (((mode) & S_IFMT) == S_IFPORT)
142#else
143#if !defined(S_ISPORT)
144#define S_ISPORT(mode) (0)
145#endif
146#endif
147
148#define SH_KEY_NULL _("000000000000000000000000000000000000000000000000")
149
150#undef FIL__
151#define FIL__ _("sh_unix.c")
152
153unsigned long mask_PRELINK = MASK_PRELINK_;
154unsigned long mask_USER0 = MASK_USER_;
155unsigned long mask_USER1 = MASK_USER_;
156unsigned long mask_USER2 = MASK_USER_;
157unsigned long mask_USER3 = MASK_USER_;
158unsigned long mask_USER4 = MASK_USER_;
159unsigned long mask_ALLIGNORE = MASK_ALLIGNORE_;
160unsigned long mask_ATTRIBUTES = MASK_ATTRIBUTES_;
161unsigned long mask_LOGFILES = MASK_LOGFILES_;
162unsigned long mask_LOGGROW = MASK_LOGGROW_;
163unsigned long mask_READONLY = MASK_READONLY_;
164unsigned long mask_NOIGNORE = MASK_NOIGNORE_;
165
166
167extern char **environ;
168
169int sh_unix_maskreset()
170{
171 mask_PRELINK = MASK_PRELINK_;
172 mask_USER0 = MASK_USER_;
173 mask_USER1 = MASK_USER_;
174 mask_USER2 = MASK_USER_;
175 mask_USER3 = MASK_USER_;
176 mask_USER4 = MASK_USER_;
177 mask_ALLIGNORE = MASK_ALLIGNORE_;
178 mask_ATTRIBUTES = MASK_ATTRIBUTES_;
179 mask_LOGFILES = MASK_LOGFILES_;
180 mask_LOGGROW = MASK_LOGGROW_;
181 mask_READONLY = MASK_READONLY_;
182 mask_NOIGNORE = MASK_NOIGNORE_;
183 return 0;
184}
185
186
187#ifdef SYS_SIGLIST_DECLARED
188/* extern const char * const sys_siglist[]; */
189#else
190char * sh_unix_siglist (int signum)
191{
192 switch (signum)
193 {
194#ifdef SIGHUP
195 case SIGHUP:
196 return _("Hangup");
197#endif
198#ifdef SIGINT
199 case SIGINT:
200 return _("Interrupt");
201#endif
202#ifdef SIGQUIT
203 case SIGQUIT:
204 return _("Quit");
205#endif
206#ifdef SIGILL
207 case SIGILL:
208 return _("Illegal instruction");
209#endif
210#ifdef SIGTRAP
211 case SIGTRAP:
212 return _("Trace/breakpoint trap");
213#endif
214#ifdef SIGABRT
215 case SIGABRT:
216 return _("IOT trap/Abort");
217#endif
218#ifdef SIGBUS
219 case SIGBUS:
220 return _("Bus error");
221#endif
222#ifdef SIGFPE
223 case SIGFPE:
224 return _("Floating point exception");
225#endif
226#ifdef SIGUSR1
227 case SIGUSR1:
228 return _("User defined signal 1");
229#endif
230#ifdef SIGSEGV
231 case SIGSEGV:
232 return _("Segmentation fault");
233#endif
234#ifdef SIGUSR2
235 case SIGUSR2:
236 return _("User defined signal 2");
237#endif
238#ifdef SIGPIPE
239 case SIGPIPE:
240 return _("Broken pipe");
241#endif
242#ifdef SIGALRM
243 case SIGALRM:
244 return _("Alarm clock");
245#endif
246#ifdef SIGTERM
247 case SIGTERM:
248 return _("Terminated");
249#endif
250#ifdef SIGSTKFLT
251 case SIGSTKFLT:
252 return _("Stack fault");
253#endif
254#ifdef SIGCHLD
255 case SIGCHLD:
256 return _("Child exited");
257#endif
258#ifdef SIGCONT
259 case SIGCONT:
260 return _("Continued");
261#endif
262#ifdef SIGSTOP
263 case SIGSTOP:
264 return _("Stopped");
265#endif
266#ifdef SIGTSTP
267 case SIGTSTP:
268 return _("Stop typed at tty");
269#endif
270#ifdef SIGTTIN
271 case SIGTTIN:
272 return _("Stopped (tty input)");
273#endif
274#ifdef SIGTTOU
275 case SIGTTOU:
276 return _("Stopped (tty output)");
277#endif
278#ifdef SIGURG
279 case SIGURG:
280 return _("Urgent condition");
281#endif
282#ifdef SIGXCPU
283 case SIGXCPU:
284 return _("CPU time limit exceeded");
285#endif
286#ifdef SIGXFSZ
287 case SIGXFSZ:
288 return _("File size limit exceeded");
289#endif
290#ifdef SIGVTALRM
291 case SIGVTALRM:
292 return _("Virtual time alarm");
293#endif
294#ifdef SIGPROF
295 case SIGPROF:
296 return _("Profile signal");
297#endif
298#ifdef SIGWINCH
299 case SIGWINCH:
300 return _("Window size changed");
301#endif
302#ifdef SIGIO
303 case SIGIO:
304 return _("Possible I/O");
305#endif
306#ifdef SIGPWR
307 case SIGPWR:
308 return _("Power failure");
309#endif
310#ifdef SIGUNUSED
311 case SIGUNUSED:
312 return _("Unused signal");
313#endif
314 }
315 return _("Unknown");
316}
317#endif
318
319
320/* Log from within a signal handler without using any
321 * functions that are not async signal safe.
322 *
323 * This is the safe_itoa helper function.
324 */
325char * safe_itoa(int i, char * str, int size)
326{
327 unsigned int u;
328 int iisneg = 0;
329 char *p = &str[size-1];
330
331 *p = '\0';
332 if (i < 0) {
333 iisneg = 1;
334 u = ((unsigned int)(-(1+i))) + 1;
335 } else {
336 u = i;
337 }
338 do {
339 --p;
340 *p = '0' + (u % 10);
341 u /= 10;
342 } while (u && (p != str));
343 if ((iisneg == 1) && (p != str)) {
344 --p;
345 *p = '-';
346 }
347 return p;
348}
349
350/* Log from within a signal handler without using any
351 * functions that are not async signal safe.
352 *
353 * This is the safe_logger function.
354 * Arguments: signal (signal number), method (0=logger, 1=stderr), thepid (pid)
355 */
356extern int OnlyStderr;
357
358int safe_logger (int thesignal, int method, char * details)
359{
360 unsigned int i = 0;
361 int status = -1;
362 struct stat buf;
363 pid_t newpid;
364 char str[128];
365 char * p;
366
367 char l0[64], l1[64], l2[64], l3[64];
368 char a0[32], a1[32], a2[32];
369 char e0[128];
370 char msg[128];
371
372 char * locations[] = { NULL, NULL, NULL, NULL, NULL };
373 char * envp[] = { NULL, NULL };
374 char * argp[] = { NULL, NULL, NULL, NULL, NULL };
375
376 pid_t thepid = getpid();
377
378 if ((sh.flag.isdaemon == S_FALSE) || (OnlyStderr == S_TRUE))
379 method = 1;
380
381 /* seems that solaris cc needs this way of initializing ...
382 */
383 locations[0] = l0;
384 locations[1] = l1;
385 locations[2] = l2;
386 locations[3] = l3;
387
388 envp[0] = e0;
389
390 argp[0] = a0;
391 argp[1] = a1;
392 argp[2] = a2;
393
394 sl_strlcpy(msg, _("samhain["), 128);
395 p = safe_itoa((int) thepid, str, 128);
396 if (p && *p)
397 sl_strlcat(msg, p, 128);
398 if (thesignal == 0)
399 {
400 if (details == NULL) {
401 sl_strlcat(msg, _("]: out of memory"), 128);
402 } else {
403 sl_strlcat(msg, _("]: "), 128);
404 sl_strlcat(msg, details, 128);
405 }
406 }
407 else
408 {
409 sl_strlcat(msg, _("]: exit on signal "), 128);
410 p = safe_itoa(thesignal, str, 128);
411 if (p && *p)
412 sl_strlcat(msg, p, 128);
413 }
414
415 if (method == 1) {
416#ifndef STDERR_FILENO
417#define STDERR_FILENO 2
418#endif
419 int retval = 0;
420 do {
421 retval = write(STDERR_FILENO, msg, strlen(msg));
422 } while (retval < 0 && errno == EINTR);
423 do {
424 retval = write(STDERR_FILENO, "\n", 1);
425 } while (retval < 0 && errno == EINTR);
426 return 0;
427 }
428
429 sl_strlcpy (l0, _("/usr/bin/logger"), 64);
430 sl_strlcpy (l1, _("/usr/sbin/logger"), 64);
431 sl_strlcpy (l2, _("/usr/ucb/logger"), 64);
432 sl_strlcpy (l3, _("/bin/logger"), 64);
433
434 sl_strlcpy (a0, _("logger"), 32);
435 sl_strlcpy (a1, _("-p"), 32);
436 sl_strlcpy (a2, _("daemon.alert"), 32);
437
438 sl_strlcpy (e0,
439 _("PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/ucb:/usr/local/bin"),
440 128);
441
442 while (locations[i] != NULL) {
443 status = stat(locations[i], &buf);
444 if (status == 0)
445 break;
446 ++i;
447 }
448
449 if (locations[i] != NULL) {
450 argp[3] = msg;
451 newpid = fork();
452 if (newpid == 0) {
453 execve(locations[i], argp, envp);
454 _exit(1);
455 }
456 else if (newpid > 0) {
457 waitpid(newpid, &status, WUNTRACED);
458 }
459 }
460 return 0;
461}
462
463void safe_fatal (const char * details,
464 const char * file, int line)
465{
466 char msg[128];
467 char str[128];
468 char * p;
469 int thesignal = 0;
470 int method = 0;
471
472 p = safe_itoa((int) line, str, 128);
473 sl_strlcpy(msg, _("FATAL: "), 128);
474 sl_strlcat(msg, file, 128);
475 sl_strlcat(msg, ": ", 128);
476 if (p && (*p)) {
477 sl_strlcat(msg, p , 128);
478 sl_strlcat(msg, ": ", 128);
479 }
480 sl_strlcat(msg, details, 128);
481 (void) safe_logger (thesignal, method, msg);
482 raise(SIGKILL);
483}
484
485extern char sh_sig_msg[64];
486
487volatile int immediate_exit_normal = 0;
488
489#if defined(SA_SIGACTION_WORKS)
490static
491void sh_unix_sigexit (int mysignal, siginfo_t * signal_info, void * signal_add)
492#else
493static
494void sh_unix_sigexit (int mysignal)
495#endif
496{
497
498#if defined(SA_SIGACTION_WORKS)
499 if (signal_info != NULL && signal_info->si_code == SI_USER &&
500 mysignal != SIGTERM && mysignal != SIGINT)
501 {
502 return;
503 }
504
505 /* avoid compiler warning (unused var)
506 */
507 (void) signal_add;
508#endif
509
510 /*
511 * Block re-entry
512 */
513 if (immediate_exit_normal > 0)
514 {
515 ++immediate_exit_normal;
516 if ((skey != NULL) && (immediate_exit_normal == 2))
517 memset (skey, '\0', sizeof(sh_key_t));
518 if (immediate_exit_normal == 2)
519 {
520 int val_return;
521
522 do {
523 val_return = chdir ("/");
524 } while (val_return < 0 && errno == EINTR);
525
526 safe_logger (mysignal, 0, NULL);
527 }
528 raise(SIGKILL);
529 }
530 else
531 {
532 immediate_exit_normal = 1;
533 }
534
535#ifdef SYS_SIGLIST_DECLARED
536 strncpy (sh_sig_msg, sys_siglist[mysignal], 40);
537#else
538 strncpy (sh_sig_msg, sh_unix_siglist(mysignal), 40);
539#endif
540 sh_sig_msg[63] = '\0';
541
542 ++sig_raised;
543 ++sig_urgent;
544 sig_termfast = 1;
545 return;
546}
547
548volatile int immediate_exit_fast = 0;
549
550#if defined(SA_SIGACTION_WORKS)
551static
552void sh_unix_sigexit_fast (int mysignal, siginfo_t * signal_info,
553 void * signal_add)
554#else
555static
556void sh_unix_sigexit_fast (int mysignal)
557#endif
558{
559#if defined(SL_DEBUG) && (defined(USE_SYSTEM_MALLOC) || !defined(USE_MALLOC_LOCK))
560 int retval;
561#endif
562
563#if defined(SA_SIGACTION_WORKS)
564 if (signal_info != NULL && signal_info->si_code == SI_USER)
565 {
566 return;
567 }
568#endif
569
570 /* avoid compiler warning (unused var)
571 */
572#if defined(SA_SIGACTION_WORKS)
573 (void) signal_add;
574#endif
575
576 /* Check whether the heap is ok; otherwise _exit
577 */
578#if !defined(SL_DEBUG) || (!defined(USE_SYSTEM_MALLOC) && defined(USE_MALLOC_LOCK))
579 ++immediate_exit_fast;
580 if (skey != NULL && immediate_exit_fast < 2)
581 memset (skey, '\0', sizeof(sh_key_t));
582 if (immediate_exit_fast < 2)
583 safe_logger (mysignal, 0, NULL);
584 raise(SIGKILL);
585#else
586
587 /* debug code
588 */
589 if (immediate_exit_fast == 1)
590 {
591 ++immediate_exit_fast;
592 if (skey != NULL)
593 memset (skey, '\0', sizeof(sh_key_t));
594#ifdef WITH_MESSAGE_QUEUE
595 close_ipc ();
596#endif
597 safe_logger (mysignal, 0, NULL);
598 do {
599 retval = chdir ("/");
600 } while (retval < 0 && errno == EINTR);
601 raise(SIGFPE);
602 }
603 else if (immediate_exit_fast == 2)
604 {
605 do {
606 retval = chdir ("/");
607 } while (retval < 0 && errno == EINTR);
608 raise(SIGFPE);
609 }
610 else if (immediate_exit_fast != 0)
611 {
612 raise(SIGKILL);
613 }
614
615 ++immediate_exit_fast;
616
617 /* The FPE|BUS|SEGV|ILL signals leave the system in an undefined
618 * state, thus it is best to exit immediately.
619 */
620#ifdef SYS_SIGLIST_DECLARED
621 strncpy (sh_sig_msg, sys_siglist[mysignal], 40);
622#else
623 strncpy (sh_sig_msg, sh_unix_siglist(mysignal), 40);
624#endif
625 sh_sig_msg[63] = '\0';
626
627 sl_stack_print();
628
629 /* Try to push out an error message.
630 */
631 sh_error_handle ((-1), FIL__, __LINE__, mysignal, MSG_EXIT_NORMAL,
632 sh.prg_name, sh_sig_msg);
633
634 if (skey != NULL)
635 memset (skey, '\0', sizeof(sh_key_t));
636#ifdef WITH_MESSAGE_QUEUE
637 close_ipc ();
638#endif
639
640 do {
641 retval = chdir ("/");
642 } while (retval < 0 && errno == EINTR);
643
644 raise(SIGFPE);
645#endif
646}
647
648
649static
650void sh_unix_sigaction (int mysignal)
651{
652 ++sig_raised;
653#ifdef SIGUSR1
654 if (mysignal == SIGUSR1)
655 sig_debug_switch = 1;
656#endif
657#ifdef SIGUSR2
658 if (mysignal == SIGUSR2)
659 {
660 ++sig_suspend_switch;
661 ++sig_urgent;
662 }
663#endif
664#ifdef SIGHUP
665 if (mysignal == SIGHUP)
666 sig_config_read_again = 1;
667#endif
668#ifdef SIGTTOU
669 if (mysignal == SIGTTOU)
670 sig_force_check = 1;
671#endif
672#ifdef SIGABRT
673 if (mysignal == SIGABRT)
674 sig_fresh_trail = 1;
675#endif
676#ifdef SIGQUIT
677 if (mysignal == SIGQUIT)
678 {
679 sig_terminate = 1;
680 ++sig_urgent;
681 }
682#endif
683#ifdef SIGTERM
684 if (mysignal == SIGTERM)
685 {
686 strncpy (sh_sig_msg, _("Terminated"), 40);
687 sig_termfast = 1;
688 ++sig_urgent;
689 }
690#endif
691
692 return;
693}
694
695static
696void sh_unix_siginstall (int goDaemon)
697{
698 struct sigaction act, act_fast, act2, oldact, ignact;
699#if defined (SH_WITH_SERVER)
700 (void) goDaemon;
701#endif
702
703 SL_ENTER(_("sh_unix_siginstall"));
704
705 ignact.sa_handler = SIG_IGN; /* signal action */
706 sigemptyset( &ignact.sa_mask ); /* set an empty mask */
707 ignact.sa_flags = 0; /* init sa_flags */
708
709#if defined(SA_SIGACTION_WORKS)
710 act.sa_sigaction = &sh_unix_sigexit; /* signal action */
711#else
712 act.sa_handler = &sh_unix_sigexit; /* signal action */
713#endif
714
715 sigfillset ( &act.sa_mask ); /* set a full mask */
716
717
718 /* Block all but deadly signals.
719 */
720#ifdef SIGILL
721 sigdelset ( &act.sa_mask, SIGILL );
722#endif
723#ifndef SL_DEBUG
724#ifdef SIGFPE
725 sigdelset ( &act.sa_mask, SIGFPE );
726#endif
727#endif
728#ifdef SIGSEGV
729 sigdelset ( &act.sa_mask, SIGSEGV );
730#endif
731#ifdef SIGBUS
732 sigdelset ( &act.sa_mask, SIGBUS );
733#endif
734
735#if defined(SA_SIGACTION_WORKS)
736 act_fast.sa_sigaction = &sh_unix_sigexit_fast; /* signal action */
737#else
738 act_fast.sa_handler = &sh_unix_sigexit_fast; /* signal action */
739#endif
740
741 sigfillset ( &act_fast.sa_mask ); /* set a full mask */
742
743#ifdef SIGILL
744 sigdelset ( &act_fast.sa_mask, SIGILL );
745#endif
746#ifndef SL_DEBUG
747#ifdef SIGFPE
748 sigdelset ( &act_fast.sa_mask, SIGFPE );
749#endif
750#endif
751#ifdef SIGSEGV
752 sigdelset ( &act_fast.sa_mask, SIGSEGV );
753#endif
754#ifdef SIGBUS
755 sigdelset ( &act_fast.sa_mask, SIGBUS );
756#endif
757
758
759 /* Use siginfo to verify origin of signal, if possible.
760 */
761#if defined(SA_SIGACTION_WORKS)
762 act.sa_flags = SA_SIGINFO;
763 act_fast.sa_flags = SA_SIGINFO;
764#else
765 act.sa_flags = 0;
766 act_fast.sa_flags = 0;
767#endif
768
769 /* Do not block the signal from being received in its handler ...
770 * (is this a good or a bad idea ??).
771 */
772#if defined(SA_NOMASK)
773 act_fast.sa_flags |= SA_NOMASK;
774#elif defined(SA_NODEFER)
775 act_fast.sa_flags |= SA_NODEFER;
776#endif
777
778
779 act2.sa_handler = &sh_unix_sigaction; /* signal action */
780 sigemptyset( &act2.sa_mask ); /* set an empty mask */
781 act2.sa_flags = 0; /* init sa_flags */
782
783 /* signals to control the daemon */
784
785#ifdef SIGHUP
786 retry_sigaction(FIL__, __LINE__, SIGHUP, &act2, &oldact);
787#endif
788#ifdef SIGABRT
789 retry_sigaction(FIL__, __LINE__, SIGABRT, &act2, &oldact);
790#endif
791#ifdef SIGUSR1
792 retry_sigaction(FIL__, __LINE__, SIGUSR1, &act2, &oldact);
793#endif
794#ifdef SIGUSR2
795 retry_sigaction(FIL__, __LINE__, SIGUSR2, &act2, &oldact);
796#endif
797#ifdef SIGQUIT
798 retry_sigaction(FIL__, __LINE__, SIGQUIT, &act2, &oldact);
799#endif
800#ifdef SIGTERM
801 retry_sigaction(FIL__, __LINE__, SIGTERM, &act, &oldact);
802#endif
803
804 /* fatal signals that may cause termination */
805
806#ifdef SIGILL
807 retry_sigaction(FIL__, __LINE__, SIGILL, &act_fast, &oldact);
808#endif
809#ifndef SL_DEBUG
810#ifdef SIGFPE
811 retry_sigaction(FIL__, __LINE__, SIGFPE, &act_fast, &oldact);
812#endif
813#endif
814#ifdef SIGSEGV
815 retry_sigaction(FIL__, __LINE__, SIGSEGV, &act_fast, &oldact);
816#endif
817#ifdef SIGBUS
818 retry_sigaction(FIL__, __LINE__, SIGBUS, &act_fast, &oldact);
819#endif
820
821 /* other signals */
822
823#ifdef SIGINT
824 retry_sigaction(FIL__, __LINE__, SIGINT, &act, &oldact);
825#endif
826#ifdef SIGPIPE
827#ifdef HAVE_PTHREAD
828 retry_sigaction(FIL__, __LINE__, SIGPIPE, &ignact, &oldact);
829#else
830 retry_sigaction(FIL__, __LINE__, SIGPIPE, &act, &oldact);
831#endif
832#endif
833#ifdef SIGALRM
834 retry_sigaction(FIL__, __LINE__, SIGALRM, &ignact, &oldact);
835#endif
836#ifdef SIGTSTP
837 retry_sigaction(FIL__, __LINE__, SIGTSTP, &ignact, &oldact);
838#endif
839#ifdef SIGTTIN
840 retry_sigaction(FIL__, __LINE__, SIGTTIN, &ignact, &oldact);
841#endif
842#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
843#ifdef SIGTTOU
844 if (goDaemon == 1)
845 retry_sigaction(FIL__, __LINE__, SIGTTOU, &act2, &oldact);
846 else
847 retry_sigaction(FIL__, __LINE__, SIGTTOU, &ignact, &oldact);
848#endif
849#else
850#ifdef SIGTTOU
851 retry_sigaction(FIL__, __LINE__, SIGTTOU, &ignact, &oldact);
852#endif
853#endif
854
855#ifdef SIGTRAP
856#if !defined(SCREW_IT_UP)
857 retry_sigaction(FIL__, __LINE__, SIGTRAP, &act, &oldact);
858#endif
859#endif
860
861#ifdef SIGPOLL
862 retry_sigaction(FIL__, __LINE__, SIGPOLL, &ignact, &oldact);
863#endif
864#if defined(SIGPROF) && !defined(SH_PROFILE)
865 retry_sigaction(FIL__, __LINE__, SIGPROF, &ignact, &oldact);
866#endif
867#ifdef SIGSYS
868 retry_sigaction(FIL__, __LINE__, SIGSYS, &act, &oldact);
869#endif
870#ifdef SIGURG
871 retry_sigaction(FIL__, __LINE__, SIGURG, &ignact, &oldact);
872#endif
873#if defined(SIGVTALRM) && !defined(SH_PROFILE)
874 retry_sigaction(FIL__, __LINE__, SIGVTALRM, &ignact, &oldact);
875#endif
876#ifdef SIGXCPU
877 retry_sigaction(FIL__, __LINE__, SIGXCPU, &act, &oldact);
878#endif
879#ifdef SIGXFSZ
880 retry_sigaction(FIL__, __LINE__, SIGXFSZ, &act, &oldact);
881#endif
882
883#ifdef SIGEMT
884 retry_sigaction(FIL__, __LINE__, SIGEMT, &ignact, &oldact);
885#endif
886#ifdef SIGSTKFLT
887 retry_sigaction(FIL__, __LINE__, SIGSTKFLT, &act, &oldact);
888#endif
889#ifdef SIGIO
890 retry_sigaction(FIL__, __LINE__, SIGIO, &ignact, &oldact);
891#endif
892#ifdef SIGPWR
893 retry_sigaction(FIL__, __LINE__, SIGPWR, &act, &oldact);
894#endif
895
896#ifdef SIGLOST
897 retry_sigaction(FIL__, __LINE__, SIGLOST, &ignact, &oldact);
898#endif
899#ifdef SIGUNUSED
900 retry_sigaction(FIL__, __LINE__, SIGUNUSED, &ignact, &oldact);
901#endif
902
903 SL_RET0(_("sh_unix_siginstall"));
904}
905
906/* ---------------------------------------------------------------- */
907
908/* checksum the own binary
909 */
910int sh_unix_self_hash (const char * c)
911{
912 char message[512];
913 char hashbuf[KEYBUF_SIZE];
914
915 SL_ENTER(_("sh_unix_self_hash"));
916
917 if (c == NULL)
918 {
919 sh.exec.path[0] = '\0';
920 SL_RETURN((0), _("sh_unix_self_hash"));
921 }
922 sl_strlcpy(sh.exec.path, c, SH_PATHBUF);
923
924 sl_strlcpy(sh.exec.hash,
925 sh_tiger_hash (c, TIGER_FILE, TIGER_NOLIM, hashbuf, sizeof(hashbuf)),
926 KEY_LEN+1);
927 sl_snprintf(message, 512, _("%s has checksum: %s"),
928 sh.exec.path, sh.exec.hash);
929 message[511] = '\0';
930 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
931 message, _("sh_unix_self_hash"));
932 if (0 == sl_strcmp(sh.exec.hash, SH_KEY_NULL ))
933 {
934 dlog(1, FIL__, __LINE__,
935 _("Could not checksum my own executable because of the\nfollowing error: %s: %s\n\nPossible reasons include:\n Wrong path in configure file option SamhainPath=/path/to/executable\n No read permission for the effective UID: %d\n"),
936 sh.exec.path, sl_get_errmsg(), (int) sl_ret_euid());
937 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_NOACCESS,
938 (long) sh.real.uid, c);
939 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
940 }
941 SL_RETURN((0), _("sh_unix_self_hash"));
942}
943
944int sh_unix_self_check ()
945{
946 char newhash[KEY_LEN+1];
947 char message[512];
948 char hashbuf[KEYBUF_SIZE];
949
950 SL_ENTER(_("sh_unix_self_check"));
951 if (sh.exec.path == NULL || sh.exec.path[0] == '\0')
952 SL_RETURN((0), _("sh_unix_self_check"));
953
954 sl_strlcpy(newhash,
955 sh_tiger_hash (sh.exec.path, TIGER_FILE, TIGER_NOLIM, hashbuf, sizeof(hashbuf)),
956 KEY_LEN+1);
957 if (0 == sl_strncmp(sh.exec.hash,
958 newhash,
959 KEY_LEN))
960 SL_RETURN((0), _("sh_unix_self_check"));
961
962
963 dlog(1, FIL__, __LINE__,
964 _("The checksum of the executable: %s has changed since startup (%s -> %s).\n"),
965 sh.exec.path, sh.exec.hash, newhash);
966
967 sl_snprintf(message, 512,
968 _("The checksum of %s has changed since startup (%s -> %s)"),
969 sh.exec.path, sh.exec.hash, newhash);
970 message[511] = '\0';
971
972 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
973 message, _("sh_unix_self_check"));
974 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_E_AUTH,
975 sh.exec.path);
976 SL_RETURN((-1), _("sh_unix_self_check"));
977}
978
979
980/* ---------------------------------------------------------------- */
981
982
983/* added Tue Feb 22 10:36:44 NFT 2000 Rainer Wichmann */
984static int tf_add_trusted_user_int(const char * c)
985{
986 struct passwd * w;
987 int count;
988 uid_t pwid = (uid_t)-1;
989
990#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
991 struct passwd pwd;
992 char buffer[SH_PWBUF_SIZE];
993#endif
994
995 SL_ENTER(_("tf_add_trusted_user_int"));
996
997 /* First check for a user name.
998 */
999#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1000 sh_getpwnam_r(c, &pwd, buffer, sizeof(buffer), &w);
1001#else
1002 w = sh_getpwnam(c);
1003#endif
1004
1005 if ((w != NULL) && ((pwid = w->pw_uid) > 0))
1006 goto succe;
1007
1008 /* Failed, so check for a numerical value.
1009 */
1010 pwid = strtol(c, (char **)NULL, 10);
1011 if (pwid > 0 && pwid < 65535)
1012 goto succe;
1013
1014 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1015 _("add trusted user"), c);
1016 SL_RETURN((-1), _("tf_add_trusted_user_int"));
1017
1018 succe:
1019 count = sl_trust_add_user(pwid);
1020 SL_RETURN((count), _("tf_add_trusted_user_int"));
1021}
1022
1023int tf_add_trusted_user(const char * c)
1024{
1025 int i;
1026 char * q;
1027 char * p = sh_util_strdup (c);
1028#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1029 char * saveptr;
1030#endif
1031
1032 SL_ENTER(_("tf_add_trusted_user"));
1033
1034#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1035 q = strtok_r(p, ", \t", &saveptr);
1036#else
1037 q = strtok(p, ", \t");
1038#endif
1039 if (!q)
1040 {
1041 SH_FREE(p);
1042 SL_RETURN((-1), _("tf_add_trusted_user"));
1043 }
1044 while (q)
1045 {
1046 i = tf_add_trusted_user_int(q);
1047 if (SL_ISERROR(i))
1048 {
1049 SH_FREE(p);
1050 SL_RETURN((i), _("tf_add_trusted_user"));
1051 }
1052#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1053 q = strtok_r(NULL, ", \t", &saveptr);
1054#else
1055 q = strtok(NULL, ", \t");
1056#endif
1057 }
1058 SH_FREE(p);
1059 SL_RETURN((0), _("tf_add_trusted_user"));
1060}
1061
1062extern uid_t sl_trust_baduid(void);
1063extern gid_t sl_trust_badgid(void);
1064
1065#if defined(HOST_IS_CYGWIN) || defined(__cygwin__) || defined(__CYGWIN32__) || defined(__CYGWIN__)
1066int tf_trust_check (const char * file, int mode)
1067{
1068 (void) file;
1069 (void) mode;
1070 return 0;
1071}
1072#else
1073int tf_trust_check (const char * file, int mode)
1074{
1075 char * tmp;
1076 char * tmp2;
1077 char * p;
1078 int status;
1079 int level;
1080 uid_t ff_euid;
1081
1082 SL_ENTER(_("tf_trust_check"));
1083
1084 if (mode == SL_YESPRIV)
1085 sl_get_euid(&ff_euid);
1086 else
1087 sl_get_ruid(&ff_euid);
1088
1089#if defined(SH_WITH_SERVER)
1090 if (0 == sl_ret_euid()) /* privileges not dropped yet */
1091 {
1092#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1093 struct passwd pwd;
1094 char buffer[SH_PWBUF_SIZE];
1095 struct passwd * tempres;
1096 sh_getpwnam_r(DEFAULT_IDENT, &pwd, buffer, sizeof(buffer), &tempres);
1097#else
1098 struct passwd * tempres = sh_getpwnam(DEFAULT_IDENT);
1099#endif
1100
1101 if (!tempres)
1102 {
1103 dlog(1, FIL__, __LINE__,
1104 _("User %s does not exist. Please add the user to your system.\n"),
1105 DEFAULT_IDENT);
1106 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
1107 }
1108 ff_euid = tempres->pw_uid;
1109 }
1110#endif
1111
1112 status = sl_trustfile_euid(file, ff_euid);
1113
1114 if ( SL_ENONE != status)
1115 {
1116 if (status == SL_ESTAT)
1117 level = SH_ERR_ALL;
1118 else
1119 level = SH_ERR_ERR;
1120
1121 tmp = sh_util_safe_name (file);
1122 p = sl_trust_errfile();
1123 if (p && *p != '\0')
1124 {
1125 tmp2 = sh_util_safe_name (sl_trust_errfile());
1126 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST2,
1127 sl_error_string(status), tmp, tmp2);
1128 SH_FREE(tmp2);
1129 }
1130 else
1131 {
1132 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST1,
1133 sl_error_string(status), tmp);
1134 }
1135 SH_FREE(tmp);
1136
1137 if (status == SL_EBADUID || status == SL_EBADGID ||
1138 status == SL_EBADOTH || status == SL_ETRUNC ||
1139 status == SL_EINTERNAL )
1140 {
1141 switch (status) {
1142 case SL_EINTERNAL:
1143 dlog(1, FIL__, __LINE__,
1144 _("An internal error occured in the trustfile function.\n"));
1145 break;
1146 case SL_ETRUNC:
1147 tmp = sh_util_safe_name (file);
1148 dlog(1, FIL__, __LINE__,
1149 _("A filename truncation occured in the trustfile function.\nProbably the normalized filename for %s\nis too long. This may be due e.g. to deep or circular softlinks.\n"),
1150 tmp);
1151 SH_FREE(tmp);
1152 break;
1153 case SL_EBADOTH:
1154 tmp = sh_util_safe_name (file);
1155 p = sl_trust_errfile();
1156 dlog(1, FIL__, __LINE__,
1157 _("The path element: %s\nin the filename: %s is world writeable.\n"),
1158 p, tmp);
1159 SH_FREE(tmp);
1160 break;
1161 case SL_EBADUID:
1162 tmp = sh_util_safe_name (file);
1163 p = sl_trust_errfile();
1164 dlog(1, FIL__, __LINE__,
1165 _("The owner (UID = %ld) of the path element: %s\nin the filename: %s\nis not in the list of trusted users.\nTo fix the problem, you can:\n - run ./configure again with the option --with-trusted=0,...,UID\n where UID is the UID of the untrusted user, or\n - use the option TrustedUser=UID in the configuration file.\n"),
1166 (UID_CAST)sl_trust_baduid(), p, tmp);
1167 SH_FREE(tmp);
1168 break;
1169 case SL_EBADGID:
1170 tmp = sh_util_safe_name (file);
1171 p = sl_trust_errfile();
1172 dlog(1, FIL__, __LINE__,
1173 _("The path element: %s\nin the filename: %s\nis group writeable (GID = %ld), and at least one of the group\nmembers (UID = %ld) is not in the list of trusted users.\nTo fix the problem, you can:\n - run ./configure again with the option --with-trusted=0,...,UID\n where UID is the UID of the untrusted user, or\n - use the option TrustedUser=UID in the configuration file.\n"),
1174 p, tmp, (UID_CAST)sl_trust_badgid(),
1175 (UID_CAST)sl_trust_baduid());
1176 SH_FREE(tmp);
1177 break;
1178 default:
1179 break;
1180 }
1181
1182 SL_RETURN((-1), _("tf_trust_check"));
1183 }
1184 }
1185
1186 SL_RETURN((0), _("tf_trust_check"));
1187}
1188#endif
1189
1190#ifdef HAVE_INITGROUPS
1191#ifdef HOST_IS_OSF
1192int sh_unix_initgroups ( char * in_user, gid_t in_gid)
1193#else
1194int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1195#endif
1196{
1197 int status = -1;
1198 status = sh_initgroups (in_user, in_gid);
1199 if (status < 0)
1200 {
1201 if (errno == EPERM)
1202 return 0;
1203 if (errno == EINVAL)
1204 return 0;
1205 return -1;
1206 }
1207 return 0;
1208}
1209#else
1210int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1211{
1212 (void) in_user;
1213 (void) in_gid;
1214 return 0;
1215}
1216#endif
1217
1218#ifdef HAVE_INITGROUPS
1219char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len);
1220int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1221{
1222 int status = -1;
1223 char user[SH_MINIBUF];
1224
1225 SL_ENTER(_("sh_unix_initgroups2"));
1226
1227 if (NULL == sh_unix_getUIDname (SH_ERR_ERR, in_pid, user, sizeof(user)))
1228 SL_RETURN((-1), _("sh_unix_initgroups2"));
1229 status = sh_initgroups (user, in_gid);
1230 if (status < 0)
1231 {
1232 if (errno == EPERM)
1233 status = 0;
1234 if (errno == EINVAL)
1235 status = 0;
1236 }
1237 SL_RETURN((status), _("sh_unix_initgroups2"));
1238}
1239#else
1240int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1241{
1242 (void) in_pid;
1243 (void) in_gid;
1244 return 0;
1245}
1246#endif
1247
1248void sh_unix_closeall (int fd, int except, int inchild)
1249{
1250 int fdx = fd;
1251#ifdef _SC_OPEN_MAX
1252 int fdlimit = sysconf (_SC_OPEN_MAX);
1253#else
1254#ifdef OPEN_MAX
1255 int fdlimit = OPEN_MAX;
1256#else
1257 int fdlimit = _POSIX_OPEN_MAX;
1258#endif
1259#endif
1260
1261 SL_ENTER(_("sh_unix_closeall"));
1262
1263 /* can't happen - so fix it :-(
1264 */
1265 if (fdlimit < 0)
1266 fdlimit = 20; /* POSIX lower limit */
1267
1268 if (fdlimit > 65536)
1269 fdlimit = 65536;
1270
1271 /* Close everything from fd (inclusive) up to fdlimit (exclusive).
1272 */
1273 while (fd < fdlimit)
1274 {
1275 if (fd == except)
1276 fd++;
1277 else if (slib_do_trace != 0 && fd == slib_trace_fd)
1278 fd++;
1279 else
1280 close(fd++);
1281 }
1282
1283 if (!inchild)
1284 sl_dropall (fdx, except);
1285 else
1286 sl_dropall_dirty (fdx, except);
1287
1288 SL_RET0(_("sh_unix_closeall"));
1289}
1290
1291static void sh_unix_setlimits(void)
1292{
1293 struct rlimit limits;
1294
1295 SL_ENTER(_("sh_unix_setlimits"));
1296
1297 limits.rlim_cur = RLIM_INFINITY;
1298 limits.rlim_max = RLIM_INFINITY;
1299
1300#ifdef RLIMIT_CPU
1301 setrlimit (RLIMIT_CPU, &limits);
1302#endif
1303#ifdef RLIMIT_FSIZE
1304 setrlimit (RLIMIT_FSIZE, &limits);
1305#endif
1306#ifdef RLIMIT_DATA
1307 setrlimit (RLIMIT_DATA, &limits);
1308#endif
1309#ifdef RLIMIT_STACK
1310 setrlimit (RLIMIT_STACK, &limits);
1311#endif
1312#ifdef RLIMIT_RSS
1313 setrlimit (RLIMIT_RSS, &limits);
1314#endif
1315#ifdef RLIMIT_NPROC
1316 setrlimit (RLIMIT_NPROC, &limits);
1317#endif
1318#ifdef RLIMIT_MEMLOCK
1319 setrlimit (RLIMIT_MEMLOCK, &limits);
1320#endif
1321
1322#if !defined(SL_DEBUG)
1323 /* no core dumps
1324 */
1325 limits.rlim_cur = 0;
1326 limits.rlim_max = 0;
1327#ifdef RLIMIT_CORE
1328 setrlimit (RLIMIT_CORE, &limits);
1329#endif
1330#else
1331#ifdef RLIMIT_CORE
1332 setrlimit (RLIMIT_CORE, &limits);
1333#endif
1334#endif
1335
1336 limits.rlim_cur = 1024;
1337 limits.rlim_max = 1024;
1338
1339#if defined(RLIMIT_NOFILE)
1340 setrlimit (RLIMIT_NOFILE, &limits);
1341#elif defined(RLIMIT_OFILE)
1342 setrlimit (RLIMIT_OFILE, &limits);
1343#endif
1344
1345 SL_RET0(_("sh_unix_setlimits"));
1346}
1347
1348static void sh_unix_copyenv(void)
1349{
1350 char ** env0 = environ;
1351 char ** env1;
1352 int envlen = 0;
1353 size_t len;
1354
1355 SL_ENTER(_("sh_unix_copyenv"));
1356
1357 while (env0 != NULL && env0[envlen] != NULL) {
1358 /* printf("%2d: %s\n", envlen, env0[envlen]); */
1359 ++envlen;
1360 }
1361 ++envlen;
1362
1363 /* printf("-> %2d: slots allocated\n", envlen); */
1364 env1 = malloc (sizeof(char *) * envlen); /* only once */
1365 if (env1 == NULL)
1366 {
1367 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1368 SL_RET0(_("sh_unix_copyenv"));
1369 }
1370 env0 = environ;
1371 envlen = 0;
1372
1373 while (env0 != NULL && env0[envlen] != NULL) {
1374 len = strlen(env0[envlen]) + 1;
1375 env1[envlen] = malloc (len); /* only once */
1376 if (env1[envlen] == NULL)
1377 {
1378 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1379 SL_RET0(_("sh_unix_copyenv"));
1380 }
1381 sl_strlcpy(env1[envlen], env0[envlen], len);
1382 ++envlen;
1383 }
1384 env1[envlen] = NULL;
1385
1386 environ = env1;
1387 SL_RET0(_("sh_unix_copyenv"));
1388}
1389
1390/* delete all environment variables
1391 */
1392static void sh_unix_zeroenv(void)
1393{
1394 char * c;
1395 char ** env;
1396
1397 SL_ENTER(_("sh_unix_zeroenv"));
1398
1399 sh_unix_copyenv();
1400 env = environ;
1401
1402 while (env != NULL && *env != NULL) {
1403 c = strchr ((*env), '=');
1404#ifdef WITH_MYSQL
1405 /*
1406 * Skip the MYSQL_UNIX_PORT environment variable; MySQL may need it.
1407 */
1408 if (0 == sl_strncmp((*env), _("MYSQL_UNIX_PORT="), 16))
1409 {
1410 ++(env);
1411 continue;
1412 }
1413 if (0 == sl_strncmp((*env), _("MYSQL_TCP_PORT="), 15))
1414 {
1415 ++(env);
1416 continue;
1417 }
1418 if (0 == sl_strncmp((*env), _("MYSQL_HOME="), 11))
1419 {
1420 ++(env);
1421 continue;
1422 }
1423#endif
1424#ifdef WITH_ORACLE
1425 /*
1426 * Skip the ORACLE_HOME environment variable; Oracle may need it.
1427 */
1428 if (0 == sl_strncmp((*env), _("ORACLE_HOME="), 12))
1429 {
1430 ++(env);
1431 continue;
1432 }
1433#endif
1434 /*
1435 * Skip the TZ environment variable.
1436 */
1437 if (0 == sl_strncmp((*env), _("TZ="), 3))
1438 {
1439 ++(env);
1440 continue;
1441 }
1442 ++(env);
1443 if (c != NULL)
1444 {
1445 ++c;
1446 while ((*c) != '\0') {
1447 (*c) = '\0';
1448 ++c;
1449 }
1450 }
1451 }
1452
1453#ifdef HAVE_TZSET
1454 tzset();
1455#endif
1456
1457 SL_RET0(_("sh_unix_zeroenv"));
1458}
1459
1460
1461static void sh_unix_resettimer(void)
1462{
1463 struct itimerval this_timer;
1464
1465 SL_ENTER(_("sh_unix_resettimer"));
1466
1467 this_timer.it_value.tv_sec = 0;
1468 this_timer.it_value.tv_usec = 0;
1469
1470 this_timer.it_interval.tv_sec = 0;
1471 this_timer.it_interval.tv_usec = 0;
1472
1473 setitimer(ITIMER_REAL, &this_timer, NULL);
1474#if !defined(SH_PROFILE)
1475 setitimer(ITIMER_VIRTUAL, &this_timer, NULL);
1476 setitimer(ITIMER_PROF, &this_timer, NULL);
1477#endif
1478
1479 SL_RET0(_("sh_unix_resettimer"));
1480}
1481
1482static void sh_unix_resetsignals(void)
1483{
1484 int sig_num;
1485#ifdef NSIG
1486 int max_sig = NSIG;
1487#else
1488 int max_sig = 255;
1489#endif
1490 int test;
1491 struct sigaction act, oldact;
1492 int status;
1493
1494 sigset_t set_proc;
1495
1496 SL_ENTER(_("sh_unix_resetsignals"));
1497 /*
1498 * Reset the current signal mask (inherited from parent process).
1499 */
1500
1501 sigfillset(&set_proc);
1502
1503 do {
1504 errno = 0;
1505 test = sigprocmask(SIG_UNBLOCK, &set_proc, NULL);
1506 } while (test < 0 && errno == EINTR);
1507
1508 /*
1509 * Reset signal handling.
1510 */
1511
1512 act.sa_handler = SIG_DFL; /* signal action */
1513 sigemptyset( &act.sa_mask ); /* set an empty mask */
1514 act.sa_flags = 0; /* init sa_flags */
1515
1516 for (sig_num = 1; sig_num <= max_sig; ++sig_num)
1517 {
1518#if !defined(SH_PROFILE)
1519 test = retry_sigaction(FIL__, __LINE__, sig_num, &act, &oldact);
1520#else
1521 test = 0;
1522#endif
1523 if ((test == -1) && (errno != EINVAL))
1524 {
1525 char errbuf[SH_ERRBUF_SIZE];
1526 status = errno;
1527 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_SIG,
1528 sh_error_message (status, errbuf, sizeof(errbuf)), sig_num);
1529 }
1530 }
1531
1532 SL_RET0(_("sh_unix_resetsignals"));
1533}
1534
1535/* Get the local hostname (FQDN)
1536 */
1537#include <sys/socket.h>
1538
1539/* Required for BSD
1540 */
1541#ifdef HAVE_NETINET_IN_H
1542#include <netinet/in.h>
1543#endif
1544
1545#include <arpa/inet.h>
1546
1547char * sh_unix_h_name (struct hostent * host_entry)
1548{
1549 char ** p;
1550 if (strchr(host_entry->h_name, '.')) {
1551 return host_entry->h_name;
1552 } else {
1553 for (p = host_entry->h_aliases; *p; ++p) {
1554 if (strchr(*p, '.'))
1555 return *p;
1556 }
1557 }
1558 return host_entry->h_name;
1559}
1560
1561/* uname() on FreeBSD is broken, because the 'nodename' buf is too small
1562 * to hold a valid (leftmost) domain label.
1563 */
1564#if defined(HAVE_UNAME) && !defined(HOST_IS_FREEBSD)
1565#include <sys/utsname.h>
1566void sh_unix_localhost()
1567{
1568 struct utsname buf;
1569 struct hostent * he1;
1570 int i;
1571 int ddot;
1572 int len;
1573 char * p;
1574 char hostname[256];
1575
1576
1577 SL_ENTER(_("sh_unix_localhost"));
1578
1579 (void) uname (&buf);
1580 /* flawfinder: ignore */ /* ff bug, ff sees system() */
1581 sl_strlcpy (sh.host.system, buf.sysname, SH_MINIBUF);
1582 sl_strlcpy (sh.host.release, buf.release, SH_MINIBUF);
1583 sl_strlcpy (sh.host.machine, buf.machine, SH_MINIBUF);
1584
1585 /* Workaround for cases where nodename could be
1586 * a truncated FQDN.
1587 */
1588 if (strlen(buf.nodename) == (sizeof(buf.nodename)-1))
1589 {
1590 p = strchr(buf.nodename, '.');
1591 if (NULL != p) {
1592 *p = '\0';
1593 sl_strlcpy(hostname, buf.nodename, 256);
1594 } else {
1595#ifdef HAVE_GETHOSTNAME
1596 if (0 != gethostname(hostname, 256))
1597 {
1598 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1599 _("nodename returned by uname may be truncated"),
1600 _("sh_unix_localhost"));
1601 sl_strlcpy (hostname, buf.nodename, 256);
1602 }
1603 else
1604 {
1605 hostname[255] = '\0';
1606 }
1607#else
1608 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1609 _("nodename returned by uname may be truncated"),
1610 _("sh_unix_localhost"));
1611 sl_strlcpy(hostname, buf.nodename, 256);
1612#endif
1613 }
1614 }
1615 else
1616 {
1617 sl_strlcpy(hostname, buf.nodename, 256);
1618 }
1619
1620 SH_MUTEX_LOCK(mutex_resolv);
1621 he1 = sh_gethostbyname(hostname);
1622
1623 if (he1 != NULL)
1624 {
1625 sl_strlcpy (sh.host.name, sh_unix_h_name(he1), SH_PATHBUF);
1626 }
1627 SH_MUTEX_UNLOCK(mutex_resolv);
1628
1629 if (he1 == NULL)
1630 {
1631 dlog(1, FIL__, __LINE__,
1632 _("According to uname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN. For more information, see the entry about self-resolving under 'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1633 hostname);
1634 sl_strlcpy (sh.host.name, hostname, SH_PATHBUF);
1635 }
1636
1637
1638 /* check whether it looks like a FQDN
1639 */
1640 len = sl_strlen(sh.host.name);
1641 ddot = 0;
1642 for (i = 0; i < len; ++i)
1643 if (sh.host.name[i] == '.') ++ddot;
1644
1645 if (ddot == 0 && he1 != NULL)
1646 {
1647 dlog(1, FIL__, __LINE__,
1648 _("According to uname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN.\nRather, it resolves this to %s.\nFor more information, see the entry about self-resolving under\n'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1649 hostname, sh.host.name);
1650 sl_strlcpy (sh.host.name,
1651 inet_ntoa (*(struct in_addr *) he1->h_addr),
1652 SH_PATHBUF);
1653 SL_RET0(_("sh_unix_localhost"));
1654 }
1655
1656 if (is_numeric(sh.host.name))
1657 {
1658 dlog(1, FIL__, __LINE__,
1659 _("According to uname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN.\nRather, it resolves this to %s.\nFor more information, see the entry about self-resolving under\n'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1660 hostname, sh.host.name);
1661 }
1662
1663 SL_RET0(_("sh_unix_localhost"));
1664}
1665#else
1666void sh_unix_localhost()
1667{
1668 struct hostent * he1;
1669 int i;
1670 int ddot;
1671 int len;
1672 char hostname[1024];
1673
1674
1675 SL_ENTER(_("sh_unix_localhost"));
1676
1677 (void) gethostname (hostname, 1024);
1678 hostname[1023] = '\0';
1679
1680 SH_MUTEX_LOCK(mutex_resolv);
1681 he1 = sh_gethostbyname(hostname);
1682
1683 if (he1 != NULL)
1684 {
1685 sl_strlcpy (sh.host.name, sh_unix_h_name(he1), SH_PATHBUF);
1686 }
1687 SH_MUTEX_UNLOCK(mutex_resolv);
1688
1689 if (he1 == NULL)
1690 {
1691 dlog(1, FIL__, __LINE__,
1692 _("According to gethostname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN.\nFor more information, see the entry about self-resolving under\n'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1693 hostname);
1694 sl_strlcpy (sh.host.name, _("localhost"), SH_PATHBUF);
1695 SL_RET0(_("sh_unix_localhost"));
1696 }
1697
1698 /* check whether it looks like a FQDN
1699 */
1700 len = sl_strlen(sh.host.name);
1701 ddot = 0;
1702 for (i = 0; i < len; ++i)
1703 if (sh.host.name[i] == '.') ++ddot;
1704 if (ddot == 0)
1705 {
1706 dlog(1, FIL__, __LINE__,
1707 _("According to uname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN.\nRather, it resolves this to %s.\nFor more information, see the entry about self-resolving under\n'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1708 hostname, sh.host.name);
1709 sl_strlcpy (sh.host.name,
1710 inet_ntoa (*(struct in_addr *) he1->h_addr),
1711 SH_PATHBUF);
1712 SL_RET0(_("sh_unix_localhost"));
1713 }
1714
1715 if (is_numeric(sh.host.name))
1716 {
1717 dlog(1, FIL__, __LINE__,
1718 _("According to uname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN.\nRather, it resolves this to %s.\nFor more information, see the entry about self-resolving under\n'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1719 hostname, sh.host.name);
1720 }
1721
1722 SL_RET0(_("sh_unix_localhost"));
1723}
1724#endif
1725
1726
1727void sh_unix_memlock()
1728{
1729 SL_ENTER(_("sh_unix_memlock"));
1730
1731 /* do this before dropping privileges
1732 */
1733#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
1734 if (skey->mlock_failed == SL_FALSE)
1735 {
1736 if ( (-1) == sh_unix_mlock( FIL__, __LINE__,
1737 (char *) skey, sizeof (sh_key_t)) )
1738 {
1739 SH_MUTEX_LOCK_UNSAFE(mutex_skey);
1740 skey->mlock_failed = SL_TRUE;
1741 SH_MUTEX_UNLOCK_UNSAFE(mutex_skey);
1742 }
1743 }
1744#else
1745 if (skey->mlock_failed == SL_FALSE)
1746 {
1747 SH_MUTEX_LOCK_UNSAFE(mutex_skey);
1748 skey->mlock_failed = SL_TRUE;
1749 SH_MUTEX_UNLOCK_UNSAFE(mutex_skey);
1750 }
1751#endif
1752
1753 SL_RET0(_("sh_unix_memlock"));
1754}
1755
1756#ifdef SH_WITH_SERVER
1757char * chroot_dir = NULL;
1758
1759int sh_unix_set_chroot(const char * str)
1760{
1761 size_t len;
1762 static int block = 0;
1763
1764 if (block == 1)
1765 return 0;
1766
1767 if (str && *str == '/')
1768 {
1769 len = strlen(str) + 1;
1770 chroot_dir = malloc(strlen(str) + 1); /* only once */
1771 if (!chroot_dir)
1772 {
1773 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1774 return 1;
1775 }
1776 sl_strlcpy(chroot_dir, str, len);
1777 block = 1;
1778 return 0;
1779 }
1780 return 1;
1781}
1782
1783int sh_unix_chroot(void)
1784{
1785 int status;
1786
1787 if (chroot_dir != NULL)
1788 {
1789 status = retry_aud_chdir(FIL__, __LINE__, chroot_dir);
1790 if ( (-1) == status )
1791 {
1792 char errbuf[SH_ERRBUF_SIZE];
1793 status = errno;
1794 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
1795 sh_error_message (status, errbuf, sizeof(errbuf)), chroot_dir);
1796 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1797 }
1798 /* flawfinder: ignore */
1799 return (chroot(chroot_dir));
1800 }
1801 return 0;
1802}
1803/* #ifdef SH_WITH_SERVER */
1804#else
1805int sh_unix_chroot(void) { return 0; }
1806#endif
1807
1808/* daemon mode
1809 */
1810static int block_setdeamon = 0;
1811
1812int sh_unix_setdeamon(const char * dummy)
1813{
1814 int res = 0;
1815
1816 SL_ENTER(_("sh_unix_setdeamon"));
1817
1818 if (block_setdeamon != 0)
1819 SL_RETURN((0),_("sh_unix_setdeamon"));
1820
1821 if (dummy == NULL)
1822 sh.flag.isdaemon = ON;
1823 else
1824 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
1825
1826 if (sh.flag.opts == S_TRUE)
1827 block_setdeamon = 1;
1828
1829 SL_RETURN(res, _("sh_unix_setdeamon"));
1830}
1831#if defined(HAVE_LIBPRELUDE)
1832#include "sh_prelude.h"
1833#endif
1834
1835int sh_unix_setnodeamon(const char * dummy)
1836{
1837 int res = 0;
1838
1839 SL_ENTER(_("sh_unix_setnodeamon"));
1840
1841 if (block_setdeamon != 0)
1842 SL_RETURN((0),_("sh_unix_setmodeamon"));
1843
1844 if (dummy == NULL)
1845 sh.flag.isdaemon = OFF;
1846 else
1847 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
1848
1849 if (sh.flag.opts == S_TRUE)
1850 block_setdeamon = 1;
1851
1852 SL_RETURN(res, _("sh_unix_setnodeamon"));
1853}
1854
1855int sh_unix_init(int goDaemon)
1856{
1857 int status;
1858 uid_t uid;
1859 pid_t oldpid = getpid();
1860#if defined(SH_WITH_SERVER)
1861 extern int sh_socket_open_int (void);
1862#endif
1863 char errbuf[SH_ERRBUF_SIZE];
1864
1865 SL_ENTER(_("sh_unix_init"));
1866
1867 /* fork twice, exit the parent process
1868 */
1869 if (goDaemon == 1) {
1870
1871 switch (aud_fork(FIL__, __LINE__)) {
1872 case 0: break; /* child process continues */
1873 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
1874 default: aud__exit(FIL__, __LINE__, 0); /* parent process exits */
1875 }
1876
1877 /* Child processes do not inherit page locks across a fork.
1878 * Error in next fork would return in this (?) thread of execution.
1879 */
1880 sh_unix_memlock();
1881
1882 setsid(); /* should not fail */
1883 sh.pid = (UINT64) getpid();
1884
1885 switch (aud_fork(FIL__, __LINE__)) {
1886 case 0: break; /* child process continues */
1887 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
1888 default: aud__exit(FIL__, __LINE__, 0); /* parent process exits */
1889 }
1890
1891 /* Child processes do not inherit page locks across a fork.
1892 */
1893 sh_unix_memlock();
1894 sh.pid = (UINT64) getpid();
1895
1896 } else {
1897 setsid(); /* should not fail */
1898 }
1899
1900 /* set working directory
1901 */
1902#ifdef SH_PROFILE
1903 status = 0;
1904#else
1905 status = retry_aud_chdir(FIL__, __LINE__, "/");
1906#endif
1907 if ( (-1) == status )
1908 {
1909 status = errno;
1910 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
1911 sh_error_message (status, errbuf, sizeof(errbuf)), "/");
1912 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1913 }
1914
1915 /* reset timers
1916 */
1917 sh_unix_resettimer();
1918
1919 /* signal handlers
1920 */
1921 sh_unix_resetsignals();
1922#if defined(SCREW_IT_UP)
1923 sh_sigtrap_prepare();
1924#endif
1925 sh_unix_siginstall (goDaemon);
1926
1927 /* set file creation mask
1928 */
1929 (void) umask (0); /* should not fail */
1930
1931 /* set resource limits to maximum, and
1932 * core dump size to zero
1933 */
1934 sh_unix_setlimits();
1935
1936 /* zero out the environment (like PATH='\0')
1937 */
1938 sh_unix_zeroenv();
1939
1940 if (goDaemon == 1)
1941 {
1942 /* Close first tree file descriptors
1943 */
1944 close (0); /* if running as daemon */
1945 close (1); /* if running as daemon */
1946 close (2); /* if running as daemon */
1947
1948 /* Enable full error logging
1949 */
1950 sh_error_only_stderr (S_FALSE);
1951
1952 /* open first three streams to /dev/null
1953 */
1954 status = aud_open(FIL__, __LINE__, SL_NOPRIV, _("/dev/null"), O_RDWR, 0);
1955 if (status < 0)
1956 {
1957 status = errno;
1958 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
1959 sh_error_message(status, errbuf, sizeof(errbuf)), _("open"));
1960 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1961 }
1962
1963 status = retry_aud_dup(FIL__, __LINE__, 0);
1964 if (status >= 0)
1965 retry_aud_dup(FIL__, __LINE__, 0);
1966
1967 if (status < 0)
1968 {
1969 status = errno;
1970 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
1971 sh_error_message(status, errbuf, sizeof(errbuf)), _("dup"));
1972 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1973 }
1974
1975 sh_error_enable_unsafe (S_TRUE);
1976#if defined(HAVE_LIBPRELUDE)
1977 sh_prelude_reset ();
1978#endif
1979
1980 /* --- wait until parent has exited ---
1981 */
1982 while (1 == 1)
1983 {
1984 errno = 0;
1985 if (0 > aud_kill (FIL__, __LINE__, oldpid, 0) && errno == ESRCH)
1986 {
1987 break;
1988 }
1989 retry_msleep(0, 1);
1990 }
1991
1992 /* write PID file
1993 */
1994 status = sh_unix_write_pid_file();
1995 if (status < 0)
1996 {
1997 sl_get_euid(&uid);
1998 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_PIDFILE,
1999 (long) uid, sh.srvlog.alt);
2000 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2001 }
2002#if defined(SH_WITH_SERVER)
2003 sh_socket_open_int ();
2004#endif
2005 }
2006 else
2007 {
2008 sh_error_enable_unsafe (S_TRUE);
2009#if defined(HAVE_LIBPRELUDE)
2010 sh_prelude_reset ();
2011#endif
2012#if defined(SH_WITH_SERVER)
2013 sh_socket_open_int ();
2014#endif
2015 }
2016
2017 /* chroot (this is a no-op if no chroot dir is specified
2018 */
2019 status = sh_unix_chroot();
2020 if (status < 0)
2021 {
2022 status = errno;
2023 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2024 sh_error_message(status, errbuf, sizeof(errbuf)), _("chroot"));
2025 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2026 }
2027
2028 /* drop capabilities
2029 */
2030 sl_drop_cap();
2031
2032 SL_RETURN((0),_("sh_unix_init"));
2033}
2034
2035/* --- run a command, securely --- */
2036
2037int sh_unix_run_command (const char * str)
2038{
2039 pid_t pid;
2040 char * arg[4];
2041 char * env[5];
2042 char * path = sh_util_strdup(_("/bin/sh"));
2043
2044 int status = -1;
2045
2046 arg[0] = sh_util_strdup(_("/bin/sh"));
2047 arg[1] = sh_util_strdup(_("-c"));
2048 arg[2] = sh_util_strdup(str);
2049 arg[3] = NULL;
2050
2051 env[0] = sh_util_strdup(_("PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/ucb"));
2052 env[1] = sh_util_strdup(_("SHELL=/bin/sh"));
2053 env[2] = sh_util_strdup(_("IFS= \t\n"));
2054 if (getenv("TZ")) { /* flawfinder: ignore */
2055 char * tz = sh_util_strdup(getenv("TZ")); /* flawfinder: ignore */
2056 size_t tzlen = strlen(tz);
2057 if (SL_TRUE == sl_ok_adds (4, tzlen)) {
2058 env[3] = SH_ALLOC(4+tzlen);
2059 sl_strlcpy(env[3], "TZ=", 4);
2060 sl_strlcat(env[3], tz , 4+tzlen);
2061 } else {
2062 env[3] = NULL;
2063 }
2064 } else {
2065 env[3] = NULL;
2066 }
2067 env[4] = NULL;
2068
2069 pid = fork();
2070
2071 if (pid == (pid_t)(-1))
2072 {
2073 return -1;
2074 }
2075
2076 else if (pid == 0) /* child */
2077 {
2078 memset(skey, 0, sizeof(sh_key_t));
2079 (void) umask(S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
2080 sh_unix_closeall (3, -1, SL_TRUE); /* in child process */
2081 execve(path, arg, env);
2082 _exit(EXIT_FAILURE);
2083 }
2084
2085 else /* parent */
2086 {
2087 int r;
2088
2089 while((r = waitpid(pid, &status, WUNTRACED)) != pid && r != -1) ;
2090
2091#if !defined(USE_UNO)
2092 if (r == -1 || !WIFEXITED(status))
2093 {
2094 status = -1;
2095 }
2096 else
2097 {
2098 status = WEXITSTATUS(status);
2099 }
2100#endif
2101 }
2102
2103 return status;
2104}
2105
2106/********************************************************
2107 *
2108 * TIME
2109 *
2110 ********************************************************/
2111
2112/* Figure out the time offset of the current timezone
2113 * in a portable way.
2114 */
2115char * t_zone(const time_t * xx)
2116{
2117 struct tm aa;
2118 struct tm bb;
2119 struct tm * cc;
2120 int sign = 0;
2121 int diff = 0;
2122 int hh, mm;
2123 static char tz[64];
2124
2125 SL_ENTER(_("t_zone"));
2126
2127#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2128 cc = gmtime_r (xx, &aa);
2129#else
2130 cc = gmtime (xx);
2131 memcpy (&aa, cc, sizeof(struct tm));
2132#endif
2133
2134#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2135 cc = localtime_r (xx, &bb);
2136#else
2137 cc = localtime (xx);
2138 memcpy (&bb, cc, sizeof(struct tm));
2139#endif
2140
2141 /* Check for datum wrap-around.
2142 */
2143 if (aa.tm_year < bb.tm_year)
2144 sign = (-1);
2145 else if (aa.tm_mon < bb.tm_mon)
2146 sign = (-1);
2147 else if (aa.tm_mday < bb.tm_mday)
2148 sign = (-1);
2149 else if (bb.tm_year < aa.tm_year)
2150 sign = ( 1);
2151 else if (bb.tm_mon < aa.tm_mon)
2152 sign = ( 1);
2153 else if (bb.tm_mday < aa.tm_mday)
2154 sign = ( 1);
2155
2156 diff = aa.tm_hour * 60 + aa.tm_min;
2157 diff = (bb.tm_hour * 60 + bb.tm_min) - diff;
2158 diff = diff - (sign * 24 * 60); /* datum wrap-around correction */
2159 hh = diff / 60;
2160 mm = diff - (hh * 60);
2161 sprintf (tz, _("%+03d%02d"), hh, mm); /* known to fit */
2162
2163 SL_RETURN(tz, _("t_zone"));
2164}
2165
2166unsigned long sh_unix_longtime ()
2167{
2168 return ((unsigned long)time(NULL));
2169}
2170
2171#ifdef HAVE_GETTIMEOFDAY
2172unsigned long sh_unix_notime ()
2173{
2174 struct timeval tv;
2175
2176 gettimeofday (&tv, NULL);
2177
2178 return ((unsigned long)(tv.tv_sec + tv.tv_usec * 10835 + getpid() + getppid()));
2179
2180}
2181#endif
2182
2183static int count_dev_time = 0;
2184
2185void reset_count_dev_time(void)
2186{
2187 count_dev_time = 0;
2188 return;
2189}
2190
2191int sh_unix_settimeserver (const char * address)
2192{
2193
2194 SL_ENTER(_("sh_unix_settimeserver"));
2195
2196 if (address != NULL && count_dev_time < 2
2197 && sl_strlen(address) < SH_PATHBUF)
2198 {
2199 if (count_dev_time == 0)
2200 sl_strlcpy (sh.srvtime.name, address, SH_PATHBUF);
2201 else
2202 sl_strlcpy (sh.srvtime.alt, address, SH_PATHBUF);
2203
2204 ++count_dev_time;
2205 SL_RETURN((0), _("sh_unix_settimeserver"));
2206 }
2207 SL_RETURN((-1), _("sh_unix_settimeserver"));
2208}
2209
2210
2211#ifdef HAVE_NTIME
2212#define UNIXEPOCH 2208988800UL /* difference between Unix time and net time
2213 * The UNIX EPOCH starts in 1970.
2214 */
2215#include <sys/socket.h>
2216#include <netinet/in.h>
2217#include <arpa/inet.h>
2218#include <netdb.h>
2219#include <ctype.h>
2220#endif
2221
2222/* Timeserver service. */
2223/* define is missing on HP-UX 10.20 */
2224#ifndef IPPORT_TIMESERVER
2225#define IPPORT_TIMESERVER 37
2226#endif
2227
2228char * sh_unix_time (time_t thetime, char * buffer, size_t len)
2229{
2230
2231 int status;
2232 char AsciiTime[81]; /* local time */
2233 time_t time_now;
2234 struct tm * time_ptr;
2235#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2236 struct tm time_tm;
2237#endif
2238#ifdef SH_USE_XML
2239 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2240#else
2241 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2242#endif
2243
2244#ifdef HAVE_NTIME
2245 int fd; /* network file descriptor */
2246 u_char net_time[4]; /* remote time in network format */
2247 static int failerr = 0; /* no net time */
2248 int fail = 0; /* no net time */
2249 int errflag;
2250 char errmsg[256];
2251 char error_call[SH_MINIBUF];
2252 int error_num;
2253#endif
2254
2255 SL_ENTER(_("sh_unix_time"));
2256
2257#ifdef HAVE_NTIME
2258 if (thetime == 0)
2259 {
2260 if (sh.srvtime.name[0] == '\0')
2261 {
2262 fail = 1;
2263 (void) time (&time_now);
2264 }
2265 else /* have a timeserver address */
2266 {
2267 fd = connect_port_2 (sh.srvtime.name, sh.srvtime.alt,
2268 IPPORT_TIMESERVER,
2269 error_call, &error_num, errmsg, sizeof(errmsg));
2270 if (fd >= 0)
2271 {
2272 if (4 != read_port (fd, (char *) net_time, 4, &errflag, 2))
2273 {
2274 fail = 1;
2275 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2276 MSG_E_NLOST,
2277 _("time"), sh.srvtime.name);
2278 }
2279 close(fd);
2280 }
2281 else
2282 {
2283 sh_error_handle ((-1), FIL__, __LINE__, error_num,
2284 MSG_E_NET, errmsg, error_call,
2285 _("time"), sh.srvtime.name);
2286 fail = 1;
2287 }
2288
2289 if (fail == 0)
2290 {
2291 time_now = ntohl(* (long *) net_time) - UNIXEPOCH;
2292 /* fprintf(stderr, "TIME IS %ld\n", time_now); */
2293 if (failerr == 1) {
2294 failerr = 0;
2295 sh_error_handle ((-1), FIL__, __LINE__, 0,
2296 MSG_E_NEST,
2297 _("time"), sh.srvtime.name);
2298 }
2299 }
2300 else
2301 {
2302 (void) time (&time_now);
2303 if (failerr == 0)
2304 {
2305 failerr = 1;
2306 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2307 MSG_SRV_FAIL,
2308 _("time"), sh.srvtime.name);
2309 }
2310 }
2311 }
2312 }
2313 else
2314 {
2315 time_now = thetime;
2316 }
2317
2318 /* #ifdef HAVE_NTIME */
2319#else
2320
2321 if (thetime == 0)
2322 {
2323 (void) time (&time_now);
2324 }
2325 else
2326 {
2327 time_now = thetime;
2328 }
2329
2330 /* #ifdef HAVE_NTIME */
2331#endif
2332
2333 if (time_now == (-1) )
2334 {
2335 sl_strlcpy(buffer, _(deftime), len);
2336 SL_RETURN(buffer, _("sh_unix_time"));
2337 }
2338 else
2339 {
2340#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2341 time_ptr = localtime_r (&time_now, &time_tm);
2342#else
2343 time_ptr = localtime (&time_now);
2344#endif
2345 }
2346 if (time_ptr != NULL)
2347 {
2348 status = strftime (AsciiTime, sizeof(AsciiTime),
2349#ifdef SH_USE_XML
2350 _("%Y-%m-%dT%H:%M:%S%%s"),
2351#else
2352 _("[%Y-%m-%dT%H:%M:%S%%s]"),
2353#endif
2354 time_ptr);
2355
2356 sl_snprintf(buffer, len, AsciiTime, t_zone(&time_now));
2357
2358 if ( (status == 0) || (status == sizeof(AsciiTime)) )
2359 {
2360 sl_strlcpy(buffer, _(deftime), len);
2361 SL_RETURN( buffer, _("sh_unix_time"));
2362 }
2363 else
2364 {
2365 SL_RETURN(buffer, _("sh_unix_time"));
2366 }
2367 }
2368
2369 /* last resort
2370 */
2371 sl_strlcpy(buffer, _(deftime), len);
2372 SL_RETURN( buffer, _("sh_unix_time"));
2373}
2374
2375static int sh_unix_use_localtime = S_FALSE;
2376
2377/* whether to use localtime for file timesatams in logs
2378 */
2379int sh_unix_uselocaltime (const char * c)
2380{
2381 int i;
2382 SL_ENTER(_("sh_unix_uselocaltime"));
2383 i = sh_util_flagval(c, &(sh_unix_use_localtime));
2384
2385 SL_RETURN(i, _("sh_unix_uselocaltime"));
2386}
2387
2388char * sh_unix_gmttime (time_t thetime, char * buffer, size_t len)
2389{
2390
2391 int status;
2392
2393 struct tm * time_ptr;
2394#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS)
2395 struct tm time_tm;
2396#endif
2397 char AsciiTime[81]; /* GMT time */
2398#ifdef SH_USE_XML
2399 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2400#else
2401 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2402#endif
2403
2404 SL_ENTER(_("sh_unix_gmttime"));
2405
2406 if (sh_unix_use_localtime == S_FALSE)
2407 {
2408#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2409 time_ptr = gmtime_r (&thetime, &time_tm);
2410#else
2411 time_ptr = gmtime (&thetime);
2412#endif
2413 }
2414 else
2415 {
2416#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2417 time_ptr = localtime_r (&thetime, &time_tm);
2418#else
2419 time_ptr = localtime (&thetime);
2420#endif
2421 }
2422 if (time_ptr != NULL)
2423 {
2424 status = strftime (AsciiTime, 80,
2425#ifdef SH_USE_XML
2426 _("%Y-%m-%dT%H:%M:%S"),
2427#else
2428 _("[%Y-%m-%dT%H:%M:%S]"),
2429#endif
2430 time_ptr);
2431
2432 if ( (status == 0) || (status == 80) )
2433 sl_strlcpy(buffer, _(deftime), len);
2434 else
2435 sl_strlcpy(buffer, AsciiTime, len);
2436 SL_RETURN( buffer, _("sh_unix_gmttime"));
2437 }
2438
2439 /* last resort
2440 */
2441 sl_strlcpy(buffer, _(deftime), len);
2442 SL_RETURN( buffer, _("sh_unix_gmttime"));
2443}
2444
2445
2446char * sh_unix_getUIDdir (int level, uid_t uid, char * out, size_t len)
2447{
2448 struct passwd * tempres;
2449 int status = 0;
2450#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2451 struct passwd pwd;
2452 char buffer[SH_PWBUF_SIZE];
2453#endif
2454 char errbuf[SH_ERRBUF_SIZE];
2455
2456 SL_ENTER(_("sh_unix_getUIDdir"));
2457
2458#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2459 sh_getpwuid_r(uid, &pwd, buffer, sizeof(buffer), &tempres);
2460#else
2461 errno = 0;
2462 tempres = sh_getpwuid(uid);
2463 status = errno;
2464#endif
2465
2466 if (tempres == NULL) {
2467 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2468 sh_error_message(status, errbuf, sizeof(errbuf)),
2469 _("getpwuid"), (long) uid, _("completely missing"));
2470 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2471 }
2472
2473 if (tempres->pw_dir != NULL) {
2474 sl_strlcpy(out, tempres->pw_dir, len);
2475 SL_RETURN( out, _("sh_unix_getUIDdir"));
2476 } else {
2477 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2478 sh_error_message(status, errbuf, sizeof(errbuf)),
2479 _("getpwuid"), (long) uid, _("pw_dir"));
2480 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2481 }
2482}
2483
2484SH_MUTEX_STATIC(mutex_getUIDname, PTHREAD_MUTEX_INITIALIZER);
2485
2486char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len)
2487{
2488 struct passwd * tempres;
2489#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2490 struct passwd pwd;
2491 char buffer[SH_PWBUF_SIZE];
2492#endif
2493 int status = 0;
2494 static uid_t old_uid;
2495 static char name[32] = { '\0' };
2496 char errbuf[SH_ERRBUF_SIZE];
2497
2498 SL_ENTER(_("sh_unix_getUIDname"));
2499
2500 if ((uid == old_uid) && (name[0] != '\0')) {
2501 out[0] = '\0';
2502 SH_MUTEX_LOCK_UNSAFE(mutex_getUIDname);
2503 if ((uid == old_uid) && (name[0] != '\0')) {
2504 sl_strlcpy(out, name, len);
2505 }
2506 SH_MUTEX_UNLOCK_UNSAFE(mutex_getUIDname);
2507 if (out[0] != '\0')
2508 SL_RETURN( out, _("sh_unix_getUIDname"));
2509 }
2510
2511#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2512 sh_getpwuid_r(uid, &pwd, buffer, sizeof(buffer), &tempres);
2513#else
2514 errno = 0;
2515 tempres = sh_getpwuid(uid);
2516 status = errno;
2517#endif
2518
2519 if (tempres == NULL) {
2520 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2521 sh_error_message(status, errbuf, sizeof(errbuf)),
2522 _("getpwuid"), (long) uid, _("completely missing"));
2523 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2524 }
2525
2526
2527 if (tempres->pw_name != NULL) {
2528 SH_MUTEX_LOCK_UNSAFE(mutex_getUIDname);
2529 sl_strlcpy(name, tempres->pw_name, sizeof(name));
2530 old_uid = uid;
2531 sl_strlcpy(out, name, len);
2532 SH_MUTEX_UNLOCK_UNSAFE(mutex_getUIDname);
2533 SL_RETURN( out, _("sh_unix_getUIDname"));
2534 } else {
2535 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2536 sh_error_message(status, errbuf, sizeof(errbuf)),
2537 _("getpwuid"), (long) uid, _("pw_user"));
2538 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2539 }
2540}
2541
2542SH_MUTEX_STATIC(mutex_getGIDname, PTHREAD_MUTEX_INITIALIZER);
2543
2544char * sh_unix_getGIDname (int level, gid_t gid, char * out, size_t len)
2545{
2546 struct group * tempres;
2547 int status = 0;
2548 static gid_t old_gid;
2549 static char name[32] = { '\0' };
2550#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2551 struct group grp;
2552 char buffer[SH_GRBUF_SIZE];
2553#endif
2554 char errbuf[SH_ERRBUF_SIZE];
2555
2556
2557 SL_ENTER(_("sh_unix_getGIDname"));
2558
2559 if ((gid == old_gid) && (name[0] != '\0')) {
2560 out[0] = '\0';
2561 SH_MUTEX_LOCK_UNSAFE(mutex_getGIDname);
2562 if ((gid == old_gid) && (name[0] != '\0')) {
2563 sl_strlcpy(out, name, len);
2564 }
2565 SH_MUTEX_UNLOCK_UNSAFE(mutex_getGIDname);
2566 if (out[0] != '\0')
2567 SL_RETURN( out, _("sh_unix_getGIDname"));
2568 }
2569
2570#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2571 status = sh_getgrgid_r(gid, &grp, buffer, sizeof(buffer), &tempres);
2572#else
2573 errno = 0;
2574 tempres = sh_getgrgid(gid);
2575 status = errno;
2576#endif
2577
2578 if (tempres == NULL) {
2579 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2580 sh_error_message(status, errbuf, sizeof(errbuf)),
2581 _("getgrgid"), (long) gid, _("completely missing"));
2582
2583 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2584 }
2585
2586 if (tempres->gr_name != NULL) {
2587 SH_MUTEX_LOCK_UNSAFE(mutex_getGIDname);
2588 sl_strlcpy(name, tempres->gr_name, sizeof(name));
2589 old_gid = gid;
2590 sl_strlcpy(out, name, len);
2591 SH_MUTEX_UNLOCK_UNSAFE(mutex_getGIDname);
2592 SL_RETURN( out, _("sh_unix_getGIDname"));
2593 } else {
2594 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2595 sh_error_message(status, errbuf, sizeof(errbuf)),
2596 _("getgrgid"), (long) gid, _("gr_name"));
2597 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2598 }
2599}
2600
2601int sh_unix_getUser ()
2602{
2603 char * p;
2604 uid_t seuid, sruid;
2605 char user[USER_MAX];
2606 char dir[SH_PATHBUF];
2607
2608 SL_ENTER(_("sh_unix_getUser"));
2609
2610 seuid = geteuid();
2611
2612 sh.effective.uid = seuid;
2613
2614 p = sh_unix_getUIDdir (SH_ERR_ERR, seuid, dir, sizeof(dir));
2615
2616 if (p == NULL)
2617 SL_RETURN((-1), _("sh_unix_getUser"));
2618 else
2619 {
2620 if (sl_strlen(p) >= SH_PATHBUF) {
2621 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2622 _("getpwuid"), (long) seuid, _("pw_home"));
2623 SL_RETURN((-1), _("sh_unix_getUser"));
2624 } else {
2625 sl_strlcpy ( sh.effective.home, p, SH_PATHBUF);
2626 }
2627 }
2628
2629 sruid = getuid();
2630
2631 sh.real.uid = sruid;
2632
2633 p = sh_unix_getUIDname (SH_ERR_ERR, sruid, user, sizeof(user));
2634 if (p == NULL)
2635 SL_RETURN((-1), _("sh_unix_getUser"));
2636 else
2637 {
2638 if (sl_strlen(p) >= USER_MAX) {
2639 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2640 _("getpwuid"), (long) sruid, _("pw_user"));
2641 SL_RETURN((-1), _("sh_unix_getUser"));
2642 } else {
2643 sl_strlcpy ( sh.real.user, p, USER_MAX);
2644 }
2645 }
2646
2647 p = sh_unix_getUIDdir (SH_ERR_ERR, sruid, dir, sizeof(dir));
2648
2649 if (p == NULL)
2650 SL_RETURN((-1), _("sh_unix_getUser"));
2651 else
2652 {
2653 if (sl_strlen(p) >= SH_PATHBUF) {
2654 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2655 _("getpwuid"), (long) sruid, _("pw_home"));
2656 SL_RETURN((-1), _("sh_unix_getUser"));
2657 } else {
2658 sl_strlcpy ( sh.real.home, p, SH_PATHBUF);
2659 }
2660 }
2661
2662 SL_RETURN((0), _("sh_unix_getUser"));
2663
2664 /* notreached */
2665}
2666
2667
2668int sh_unix_getline (SL_TICKET fd, char * line, int sizeofline)
2669{
2670 register int count;
2671 register int n = 0;
2672 char c;
2673
2674 SL_ENTER(_("sh_unix_getline"));
2675
2676 if (sizeofline < 2) {
2677 line[0] = '\0';
2678 SL_RETURN((0), _("sh_unix_getline"));
2679 }
2680
2681 --sizeofline;
2682
2683 while (n < sizeofline) {
2684
2685 count = sl_read (fd, &c, 1);
2686
2687 /* end of file
2688 */
2689 if (count < 1) {
2690 line[n] = '\0';
2691 n = -1;
2692 break;
2693 }
2694
2695 if (/* c != '\0' && */ c != '\n') {
2696 line[n] = c;
2697 ++n;
2698 } else if (c == '\n') {
2699 if (n > 0) {
2700 line[n] = '\0';
2701 break;
2702 } else {
2703 line[n] = '\n'; /* get newline only if only char on line */
2704 ++n;
2705 line[n] = '\0';
2706 break;
2707 }
2708 } else {
2709 line[n] = '\0';
2710 break;
2711 }
2712
2713 }
2714
2715
2716 line[sizeofline] = '\0'; /* make sure line is terminated */
2717 SL_RETURN((n), _("sh_unix_getline"));
2718}
2719
2720
2721#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
2722
2723/**************************************************************
2724 *
2725 * --- FILE INFO ---
2726 *
2727 **************************************************************/
2728
2729#if (defined(__linux__) && (defined(HAVE_LINUX_EXT2_FS_H) || defined(HAVE_EXT2FS_EXT2_FS_H))) || defined(HAVE_STAT_FLAGS)
2730
2731#if defined(__linux__)
2732
2733/* --- Determine ext2fs file attributes. ---
2734 */
2735#include <sys/ioctl.h>
2736#if defined(HAVE_EXT2FS_EXT2_FS_H)
2737#include <ext2fs/ext2_fs.h>
2738#else
2739#include <linux/ext2_fs.h>
2740#endif
2741
2742/* __linux__ includes */
2743#endif
2744
2745static
2746int sh_unix_getinfo_attr (char * name,
2747 unsigned long * flags,
2748 char * c_attr,
2749 int fd, struct stat * buf)
2750{
2751
2752/* TAKEN FROM:
2753 *
2754 * lsattr.c - List file attributes on an ext2 file system
2755 *
2756 * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
2757 * Laboratoire MASI, Institut Blaise Pascal
2758 * Universite Pierre et Marie Curie (Paris VI)
2759 *
2760 * This file can be redistributed under the terms of the GNU General
2761 * Public License
2762 */
2763
2764#ifdef HAVE_STAT_FLAGS
2765
2766 SL_ENTER(_("sh_unix_getinfo_attr"));
2767
2768 *flags = 0;
2769
2770 /* cast to void to avoid compiler warning about unused parameters */
2771 (void) fd;
2772 (void) name;
2773
2774#ifdef UF_NODUMP
2775 if (buf->st_flags & UF_NODUMP) {
2776 *flags |= UF_NODUMP;
2777 c_attr[0] = 'd';
2778 }
2779#endif
2780#ifdef UF_IMMUTABLE
2781 if (buf->st_flags & UF_IMMUTABLE) {
2782 *flags |= UF_IMMUTABLE;
2783 c_attr[1] = 'i';
2784 }
2785#endif
2786#ifdef UF_APPEND
2787 if (buf->st_flags & UF_APPEND) {
2788 *flags |= UF_APPEND;
2789 c_attr[2] = 'a';
2790 }
2791#endif
2792#ifdef UF_NOUNLINK
2793 if (buf->st_flags & UF_NOUNLINK) {
2794 *flags |= UF_NOUNLINK;
2795 c_attr[3] = 'u';
2796 }
2797#endif
2798#ifdef UF_OPAQUE
2799 if (buf->st_flags & UF_OPAQUE) {
2800 *flags |= UF_OPAQUE;
2801 c_attr[4] = 'o';
2802 }
2803#endif
2804#ifdef SF_ARCHIVED
2805 if (buf->st_flags & SF_ARCHIVED) {
2806 *flags |= SF_ARCHIVED;
2807 c_attr[5] = 'R';
2808 }
2809
2810#endif
2811#ifdef SF_IMMUTABLE
2812 if (buf->st_flags & SF_IMMUTABLE) {
2813 *flags |= SF_IMMUTABLE;
2814 c_attr[6] = 'I';
2815 }
2816#endif
2817#ifdef SF_APPEND
2818 if (buf->st_flags & SF_APPEND) {
2819 *flags |= SF_APPEND;
2820 c_attr[7] = 'A';
2821 }
2822#endif
2823#ifdef SF_NOUNLINK
2824 if (buf->st_flags & SF_NOUNLINK) {
2825 *flags |= SF_NOUNLINK;
2826 c_attr[8] = 'U';
2827 }
2828#endif
2829
2830 /* ! HAVE_STAT_FLAGS */
2831#else
2832
2833#ifdef HAVE_EXT2_IOCTLS
2834 int /* fd, */ r, f;
2835
2836 SL_ENTER(_("sh_unix_getinfo_attr"));
2837
2838 *flags = 0;
2839 (void) buf;
2840
2841 /* open() -> aud_open() R.Wichmann
2842 fd = aud_open (FIL__, __LINE__, SL_YESPRIV, name, O_RDONLY|O_NONBLOCK, 0);
2843 */
2844
2845 if (fd == -1 || name == NULL)
2846 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
2847
2848
2849 r = ioctl (fd, EXT2_IOC_GETFLAGS, &f);
2850 /* close (fd); */
2851
2852 if (r == -1)
2853 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
2854
2855 if (f == 0)
2856 SL_RETURN(0, _("sh_unix_getinfo_attr"));
2857
2858 *flags = f;
2859
2860/* ! HAVE_EXT2_IOCTLS */
2861#else
2862
2863 SL_ENTER(_("sh_unix_getinfo_attr"));
2864
2865 *flags = 0; /* modified by R.Wichmann */
2866
2867/* ! HAVE_EXT2_IOCTLS */
2868#endif
2869/*
2870 * END
2871 *
2872 * lsattr.c - List file attributes on an ext2 file system
2873 */
2874
2875 if (*flags == 0)
2876 goto theend;
2877
2878#ifdef EXT2_SECRM_FL
2879 if ( (*flags & EXT2_SECRM_FL) != 0 ) c_attr[0] = 's';
2880#endif
2881#ifdef EXT2_UNRM_FL
2882 if ( (*flags & EXT2_UNRM_FL) != 0 ) c_attr[1] = 'u';
2883#endif
2884#ifdef EXT2_SYNC_FL
2885 if ( (*flags & EXT2_SYNC_FL) != 0 ) c_attr[2] = 'S';
2886#endif
2887#ifdef EXT2_IMMUTABLE_FL
2888 if ( (*flags & EXT2_IMMUTABLE_FL) != 0) c_attr[3] = 'i';
2889#endif
2890#ifdef EXT2_APPEND_FL
2891 if ( (*flags & EXT2_APPEND_FL) != 0 ) c_attr[4] = 'a';
2892#endif
2893#ifdef EXT2_NODUMP_FL
2894 if ( (*flags & EXT2_NODUMP_FL) != 0 ) c_attr[5] = 'd';
2895#endif
2896#ifdef EXT2_NOATIME_FL
2897 if ( (*flags & EXT2_NOATIME_FL) != 0) c_attr[6] = 'A';
2898#endif
2899#ifdef EXT2_COMPR_FL
2900 if ( (*flags & EXT2_COMPR_FL) != 0 ) c_attr[7] = 'c';
2901#endif
2902
2903#ifdef EXT2_TOPDIR_FL
2904 if ( (*flags & EXT2_TOPDIR_FL) != 0 ) c_attr[8] = 'T';
2905#endif
2906#ifdef EXT2_DIRSYNC_FL
2907 if ( (*flags & EXT2_DIRSYNC_FL) != 0 ) c_attr[9] = 'D';
2908#endif
2909#ifdef EXT2_NOTAIL_FL
2910 if ( (*flags & EXT2_NOTAIL_FL) != 0 ) c_attr[10] = 't';
2911#endif
2912#ifdef EXT2_JOURNAL_DATA_FL
2913 if ( (*flags & EXT2_JOURNAL_DATA_FL) != 0) c_attr[11] = 'j';
2914#endif
2915
2916 theend:
2917 /* ext2 */
2918#endif
2919
2920 c_attr[12] = '\0';
2921
2922 SL_RETURN(0, _("sh_unix_getinfo_attr"));
2923}
2924#else
2925static
2926int sh_unix_getinfo_attr (char * name,
2927 unsigned long * flags,
2928 char * c_attr,
2929 int fd, struct stat * buf)
2930{
2931 return 0;
2932}
2933
2934/* defined(__linux__) || defined(HAVE_STAT_FLAGS) */
2935#endif
2936
2937/* determine file type
2938 */
2939static
2940int sh_unix_getinfo_type (struct stat * buf,
2941 ShFileType * type,
2942 char * c_mode)
2943{
2944 SL_ENTER(_("sh_unix_getinfo_type"));
2945
2946 if ( S_ISREG(buf->st_mode) ) {
2947 (*type) = SH_FILE_REGULAR;
2948 c_mode[0] = '-';
2949 }
2950 else if ( S_ISLNK(buf->st_mode) ) {
2951 (*type) = SH_FILE_SYMLINK;
2952 c_mode[0] = 'l';
2953 }
2954 else if ( S_ISDIR(buf->st_mode) ) {
2955 (*type) = SH_FILE_DIRECTORY;
2956 c_mode[0] = 'd';
2957 }
2958 else if ( S_ISCHR(buf->st_mode) ) {
2959 (*type) = SH_FILE_CDEV;
2960 c_mode[0] = 'c';
2961 }
2962 else if ( S_ISBLK(buf->st_mode) ) {
2963 (*type) = SH_FILE_BDEV;
2964 c_mode[0] = 'b';
2965 }
2966 else if ( S_ISFIFO(buf->st_mode) ) {
2967 (*type) = SH_FILE_FIFO;
2968 c_mode[0] = '|';
2969 }
2970 else if ( S_ISSOCK(buf->st_mode) ) {
2971 (*type) = SH_FILE_SOCKET;
2972 c_mode[0] = 's';
2973 }
2974 else if ( S_ISDOOR(buf->st_mode) ) {
2975 (*type) = SH_FILE_DOOR;
2976 c_mode[0] = 'D';
2977 }
2978 else if ( S_ISPORT(buf->st_mode) ) {
2979 (*type) = SH_FILE_PORT;
2980 c_mode[0] = 'P';
2981 }
2982 else {
2983 (*type) = SH_FILE_UNKNOWN;
2984 c_mode[0] = '?';
2985 }
2986
2987 SL_RETURN(0, _("sh_unix_getinfo_type"));
2988}
2989
2990int sh_unix_get_ftype(char * fullpath)
2991{
2992 char c_mode[CMODE_SIZE];
2993 struct stat buf;
2994 ShFileType type;
2995 int res;
2996
2997 SL_ENTER(_("sh_unix_get_ftype"));
2998
2999 res = retry_lstat(FIL__, __LINE__, fullpath, &buf);
3000
3001 if (res < 0)
3002 SL_RETURN(SH_FILE_UNKNOWN, _("sh_unix_getinfo_type"));
3003
3004 sh_unix_getinfo_type (&buf, &type, c_mode);
3005
3006 SL_RETURN(type, _("sh_unix_get_ftype"));
3007}
3008
3009
3010static
3011int sh_unix_getinfo_mode (struct stat *buf,
3012 unsigned int * mode,
3013 char * c_mode)
3014{
3015
3016 SL_ENTER(_("sh_unix_getinfo_mode"));
3017
3018 (*mode) = buf->st_mode;
3019
3020 /* make 'ls'-like string */
3021
3022 if ( (buf->st_mode & S_IRUSR) != 0 ) c_mode[1] = 'r';
3023 if ( (buf->st_mode & S_IWUSR) != 0 ) c_mode[2] = 'w';
3024 if ( (buf->st_mode & S_IXUSR) != 0 ) {
3025 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 's';
3026 else c_mode[3] = 'x';
3027 } else {
3028 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 'S';
3029 }
3030
3031 if ( (buf->st_mode & S_IRGRP) != 0 ) c_mode[4] = 'r';
3032 if ( (buf->st_mode & S_IWGRP) != 0 ) c_mode[5] = 'w';
3033 if ( (buf->st_mode & S_IXGRP) != 0 ) {
3034 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 's';
3035 else c_mode[6] = 'x';
3036 } else {
3037 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 'S';
3038 }
3039
3040 if ( (buf->st_mode & S_IROTH) != 0 ) c_mode[7] = 'r';
3041 if ( (buf->st_mode & S_IWOTH) != 0 ) c_mode[8] = 'w';
3042#ifdef S_ISVTX /* not POSIX */
3043 if ( (buf->st_mode & S_IXOTH) != 0 ) {
3044 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 't';
3045 else c_mode[9] = 'x';
3046 } else {
3047 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 'T';
3048 }
3049#else
3050 if ( (buf->st_mode & S_IXOTH) != 0 ) c_mode[9] = 'x';
3051#endif
3052
3053 SL_RETURN(0, _("sh_unix_getinfo_mode"));
3054}
3055
3056
3057long IO_Limit = 0;
3058
3059void sh_unix_io_pause ()
3060{
3061 long runtime;
3062 float someval;
3063 unsigned long sometime;
3064
3065 if (IO_Limit == 0)
3066 {
3067 return;
3068 }
3069 else
3070 {
3071 runtime = (long) (time(NULL) - sh.statistics.time_start);
3072
3073 if (runtime > 0 && (long)(sh.statistics.bytes_hashed/runtime) > IO_Limit)
3074 {
3075 someval = sh.statistics.bytes_hashed - (IO_Limit * runtime);
3076 someval /= (float) IO_Limit;
3077 if (someval < 1.0)
3078 {
3079 someval *= 1000; /* milliseconds in a second */
3080 sometime = (unsigned long) someval;
3081 retry_msleep(0, sometime);
3082 }
3083 else
3084 {
3085 sometime = (unsigned long) someval;
3086 retry_msleep (sometime, 0);
3087 }
3088 }
3089 }
3090 return;
3091}
3092
3093int sh_unix_set_io_limit (const char * c)
3094{
3095 long val;
3096
3097 SL_ENTER(_("sh_unix_set_io_limit"));
3098
3099 val = strtol (c, (char **)NULL, 10);
3100 if (val < 0)
3101 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
3102 _("set I/O limit"), c);
3103
3104 val = (val < 0 ? 0 : val);
3105
3106 IO_Limit = val * 1024;
3107 SL_RETURN( 0, _("sh_unix_set_io_limit"));
3108}
3109
3110/* obtain file info
3111 */
3112extern int flag_err_debug;
3113
3114#include "sh_ignore.h"
3115
3116int sh_unix_checksum_size (char * filename, struct stat * fbuf,
3117 char * fileHash, int alert_timeout, SL_TICKET fd)
3118{
3119 file_type tmpFile;
3120 int status;
3121
3122 SL_ENTER(_("sh_unix_checksum_size"));
3123
3124 tmpFile.link_path = NULL;
3125
3126 if (sh.flag.checkSum != SH_CHECK_INIT)
3127 {
3128 /* lookup file in database */
3129 status = sh_hash_get_it (filename, &tmpFile);
3130 if (status != 0) {
3131 goto out;
3132 }
3133 }
3134 else
3135 {
3136 tmpFile.size = fbuf->st_size;
3137 }
3138
3139 /* if last < current get checksum */
3140 if (tmpFile.size < fbuf->st_size)
3141 {
3142 char hashbuf[KEYBUF_SIZE];
3143 UINT64 local_length = (UINT64) (tmpFile.size < 0 ? 0 : tmpFile.size);
3144 sl_strlcpy(fileHash,
3145 sh_tiger_generic_hash (filename, fd, &(local_length),
3146 alert_timeout, hashbuf, sizeof(hashbuf)),
3147 KEY_LEN+1);
3148
3149 /* return */
3150 if (tmpFile.link_path) SH_FREE(tmpFile.link_path);
3151 SL_RETURN( 0, _("sh_unix_checksum_size"));
3152 }
3153
3154 out:
3155 if (tmpFile.link_path) SH_FREE(tmpFile.link_path);
3156 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3157 SL_RETURN( -1, _("sh_unix_checksum_size"));
3158}
3159
3160int sh_unix_check_selinux = S_FALSE;
3161int sh_unix_check_acl = S_FALSE;
3162
3163#ifdef USE_ACL
3164
3165#include <sys/acl.h>
3166static char * sh_unix_getinfo_acl (char * path, int fd, struct stat * buf)
3167{
3168 /* system.posix_acl_access, system.posix_acl_default
3169 */
3170 char * out = NULL;
3171 char * collect = NULL;
3172 char * tmp;
3173 char * out_compact;
3174 ssize_t len;
3175 acl_t result;
3176
3177 SL_ENTER(_("sh_unix_getinfo_acl"));
3178
3179 result = (fd == -1) ?
3180 acl_get_file (path, ACL_TYPE_ACCESS) :
3181 acl_get_fd (fd);
3182
3183 if (result)
3184 {
3185 out = acl_to_text (result, &len);
3186 if (out && (len > 0)) {
3187 out_compact = sh_util_acl_compact (out, len);
3188 acl_free(out);
3189 if (out_compact)
3190 {
3191 collect = sh_util_strconcat (_("acl_access:"), out_compact, NULL);
3192 SH_FREE(out_compact);
3193 }
3194 }
3195 acl_free(result);
3196 }
3197
3198
3199 if ( S_ISDIR(buf->st_mode) )
3200 {
3201 result = acl_get_file (path, ACL_TYPE_DEFAULT);
3202
3203 if (result)
3204 {
3205 out = acl_to_text (result, &len);
3206 if (out && (len > 0)) {
3207 out_compact = sh_util_acl_compact (out, len);
3208 acl_free(out);
3209 if (out_compact) {
3210 if (collect) {
3211 tmp = sh_util_strconcat (_("acl_default:"),
3212 out_compact, ":", collect, NULL);
3213 SH_FREE(collect);
3214 }
3215 else {
3216 tmp = sh_util_strconcat (_("acl_default:"), out_compact, NULL);
3217 }
3218 SH_FREE(out_compact);
3219 collect = tmp;
3220 }
3221 }
3222 acl_free(result);
3223 }
3224 }
3225
3226 SL_RETURN((collect),_("sh_unix_getinfo_acl"));
3227}
3228#endif
3229
3230#ifdef USE_XATTR
3231
3232#include <attr/xattr.h>
3233static char * sh_unix_getinfo_xattr_int (char * path, int fd, char * name)
3234{
3235 char * out = NULL;
3236 char * tmp = NULL;
3237 size_t size = 256;
3238 ssize_t result;
3239
3240 SL_ENTER(_("sh_unix_getinfo_xattr_int"));
3241
3242 out = SH_ALLOC(size);
3243
3244 result = (fd == -1) ?
3245 lgetxattr (path, name, out, size-1) :
3246 fgetxattr (fd, name, out, size-1);
3247
3248 if (result == -1 && errno == ERANGE)
3249 {
3250 SH_FREE(out);
3251 result = (fd == -1) ?
3252 lgetxattr (path, name, NULL, 0) :
3253 fgetxattr (fd, name, NULL, 0);
3254 size = result + 1;
3255 out = SH_ALLOC(size);
3256 result = (fd == -1) ?
3257 lgetxattr (path, name, out, size-1) :
3258 fgetxattr (fd, name, out, size-1);
3259 }
3260
3261 if ((result > 0) && ((size_t)result < size))
3262 {
3263 out[size-1] = '\0';
3264 tmp = out;
3265 }
3266 else
3267 {
3268 SH_FREE(out);
3269 }
3270
3271 SL_RETURN((tmp),_("sh_unix_getinfo_xattr_int"));
3272}
3273
3274
3275static char * sh_unix_getinfo_xattr (char * path, int fd, struct stat * buf)
3276{
3277 /* system.posix_acl_access, system.posix_acl_default, security.selinux
3278 */
3279 char * tmp;
3280 char * out = NULL;
3281 char * collect = NULL;
3282
3283 SL_ENTER(_("sh_unix_getinfo_xattr"));
3284
3285#ifdef USE_ACL
3286 /*
3287 * we need the acl_get_fd/acl_get_file functions, getxattr will only
3288 * yield the raw bytes
3289 */
3290 if (sh_unix_check_acl == S_TRUE)
3291 {
3292 out = sh_unix_getinfo_acl(path, fd, buf);
3293
3294 if (out)
3295 {
3296 collect = out;
3297 }
3298 }
3299#endif
3300
3301 if (sh_unix_check_selinux == S_TRUE)
3302 {
3303 out = sh_unix_getinfo_xattr_int(path, fd, _("security.selinux"));
3304
3305 if (out)
3306 {
3307 if (collect) {
3308 tmp = sh_util_strconcat(_("selinux:"), out, ":", collect, NULL);
3309 SH_FREE(collect);
3310 }
3311 else {
3312 tmp = sh_util_strconcat(_("selinux:"), out, NULL);
3313 }
3314 SH_FREE(out);
3315 collect = tmp;
3316 }
3317 }
3318
3319 SL_RETURN((collect),_("sh_unix_getinfo_xattr"));
3320}
3321#endif
3322
3323#ifdef USE_XATTR
3324int sh_unix_setcheckselinux (const char * c)
3325{
3326 int i;
3327 SL_ENTER(_("sh_unix_setcheckselinux"));
3328 i = sh_util_flagval(c, &(sh_unix_check_selinux));
3329
3330 SL_RETURN(i, _("sh_unix_setcheckselinux"));
3331}
3332#endif
3333
3334#ifdef USE_ACL
3335int sh_unix_setcheckacl (const char * c)
3336{
3337 int i;
3338 SL_ENTER(_("sh_unix_setcheckacl"));
3339 i = sh_util_flagval(c, &(sh_unix_check_acl));
3340
3341 SL_RETURN(i, _("sh_unix_setcheckacl"));
3342}
3343#endif
3344
3345#ifdef HAVE_LIBZ
3346#include <zlib.h>
3347#endif
3348
3349int sh_unix_getinfo (int level, char * filename, file_type * theFile,
3350 char * fileHash, int policy)
3351{
3352 char timestr[81];
3353 long runtim;
3354 struct stat buf;
3355 struct stat lbuf;
3356 struct stat fbuf;
3357 int stat_return;
3358 int stat_errno = 0;
3359
3360 ShFileType type;
3361 unsigned int mode;
3362 char * tmp;
3363 char * tmp2;
3364
3365 char * linknamebuf;
3366 int linksize;
3367
3368 extern int get_the_fd (SL_TICKET ticket);
3369
3370 SL_TICKET rval_open;
3371 int err_open = 0;
3372
3373 int fd;
3374 int fstat_return;
3375 int fstat_errno = 0;
3376
3377 sh_string * content = NULL;
3378
3379 time_t tend;
3380 time_t tstart;
3381
3382
3383 char * path = NULL;
3384
3385 int alert_timeout = 120;
3386
3387 path = theFile->fullpath;
3388
3389 SL_ENTER(_("sh_unix_getinfo"));
3390
3391 /* --- Stat the file, and get checksum. ---
3392 */
3393 tstart = time(NULL);
3394
3395 stat_return = retry_lstat (FIL__, __LINE__,
3396 path /* theFile->fullpath */, &buf);
3397
3398 if (stat_return)
3399 stat_errno = errno;
3400
3401 fd = -1;
3402 fstat_return = -1;
3403 rval_open = -1;
3404
3405 theFile->link_path = NULL;
3406
3407 if (stat_return == 0 && S_ISREG(buf.st_mode))
3408 {
3409 rval_open = sl_open_fastread (path /* theFile->fullpath */, SL_YESPRIV);
3410 if (SL_ISERROR(rval_open))
3411 err_open = errno;
3412
3413 alert_timeout = 120; /* this is per 8K block now ! */
3414
3415 if (path[1] == 'p' && path[5] == '/' && path[2] == 'r' &&
3416 path[3] == 'o' && path[4] == 'c' && path[0] == '/')
3417 {
3418 /* seven is magic */
3419 alert_timeout = 7;
3420 }
3421
3422 fd = get_the_fd(rval_open);
3423 }
3424
3425 tend = time(NULL);
3426
3427 /* An unprivileged user may slow lstat/open to a crawl
3428 * with clever path/symlink setup
3429 */
3430 if ((tend - tstart) > (time_t) /* 60 */ 6)
3431 {
3432 tmp2 = sh_util_safe_name (theFile->fullpath);
3433 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_TOOLATE,
3434 (long)(tend - tstart), tmp2);
3435 SH_FREE(tmp2);
3436 }
3437
3438 if (fd >= 0)
3439 {
3440 fstat_return = retry_fstat (FIL__, __LINE__, fd, &fbuf);
3441 if (fstat_return)
3442 fstat_errno = errno;
3443 }
3444 else
3445 {
3446 fd = -1;
3447 }
3448
3449
3450 /* --- case 1: lstat failed ---
3451 */
3452 if (stat_return != 0)
3453 {
3454 stat_return = errno;
3455 if (!SL_ISERROR(rval_open))
3456 sl_close(rval_open);
3457 if (sh.flag.checkSum == SH_CHECK_INIT ||
3458 (sh_hash_have_it (theFile->fullpath) >= 0 &&
3459 (!SH_FFLAG_REPORTED_SET(theFile->file_reported))))
3460 {
3461 if (S_FALSE == sh_ignore_chk_del(theFile->fullpath)) {
3462 char errbuf[SH_ERRBUF_SIZE];
3463 uid_t euid;
3464 (void) sl_get_euid(&euid);
3465 tmp2 = sh_util_safe_name (theFile->fullpath);
3466 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
3467 _("lstat"),
3468 sh_error_message (stat_errno, errbuf, sizeof(errbuf)),
3469 (long) euid,
3470 tmp2);
3471 SH_FREE(tmp2);
3472 }
3473 }
3474 SL_RETURN((-1),_("sh_unix_getinfo"));
3475 }
3476
3477 /* --- case 2: not a regular file ---
3478 */
3479 else if (! S_ISREG(buf.st_mode))
3480 {
3481 if (fileHash != NULL)
3482 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3483 }
3484
3485 /* --- case 3a: a regular file, fstat ok ---
3486 */
3487 else if (fstat_return == 0 &&
3488 buf.st_mode == fbuf.st_mode &&
3489 buf.st_ino == fbuf.st_ino &&
3490 buf.st_uid == fbuf.st_uid &&
3491 buf.st_gid == fbuf.st_gid &&
3492 buf.st_dev == fbuf.st_dev )
3493 {
3494 if (fileHash != NULL)
3495 {
3496 if ((theFile->check_mask & MODI_CHK) == 0)
3497 {
3498 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3499 }
3500 else if ((theFile->check_mask & MODI_PREL) != 0 &&
3501 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
3502 alert_timeout, theFile->fullpath))
3503 {
3504 if (0 != sh_prelink_run (theFile->fullpath,
3505 fileHash, alert_timeout))
3506 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3507 }
3508 else
3509 {
3510 char hashbuf[KEYBUF_SIZE];
3511 UINT64 length_nolim = TIGER_NOLIM;
3512
3513 if (MODI_TXT_ENABLED(theFile->check_mask) && fbuf.st_size < (10 * SH_TXT_MAX))
3514 {
3515 sl_init_content (rval_open, fbuf.st_size);
3516 }
3517
3518 sl_strlcpy(fileHash,
3519 sh_tiger_generic_hash (theFile->fullpath,
3520 rval_open, &length_nolim,
3521 alert_timeout,
3522 hashbuf, sizeof(hashbuf)),
3523 KEY_LEN+1);
3524
3525 content = sl_get_content(rval_open);
3526 content = sh_string_copy(content);
3527
3528 if ((theFile->check_mask & MODI_SGROW) != 0)
3529 {
3530 fbuf.st_size = (off_t) length_nolim;
3531 buf.st_size = fbuf.st_size;
3532 sl_rewind(rval_open);
3533 sh_unix_checksum_size (theFile->fullpath, &fbuf,
3534 &fileHash[KEY_LEN + 1],
3535 alert_timeout, rval_open);
3536 }
3537 }
3538 }
3539 }
3540
3541 /* --- case 3b: a regular file, fstat ok, but different ---
3542 */
3543 else if (fstat_return == 0 && S_ISREG(fbuf.st_mode))
3544 {
3545 memcpy (&buf, &fbuf, sizeof( struct stat ));
3546
3547 if (fileHash != NULL)
3548 {
3549 if ((theFile->check_mask & MODI_CHK) == 0)
3550 {
3551 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3552 }
3553 else if (policy == SH_LEVEL_PRELINK &&
3554 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
3555 alert_timeout, theFile->fullpath))
3556 {
3557 if (0 != sh_prelink_run (theFile->fullpath,
3558 fileHash, alert_timeout))
3559 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3560 }
3561 else
3562 {
3563 char hashbuf[KEYBUF_SIZE];
3564 UINT64 length_nolim = TIGER_NOLIM;
3565
3566 if (MODI_TXT_ENABLED(theFile->check_mask) && fbuf.st_size < (10 * SH_TXT_MAX))
3567 {
3568 sl_init_content (rval_open, fbuf.st_size);
3569 }
3570
3571 sl_strlcpy(fileHash,
3572 sh_tiger_generic_hash (theFile->fullpath, rval_open,
3573 &length_nolim,
3574 alert_timeout,
3575 hashbuf, sizeof(hashbuf)),
3576 KEY_LEN + 1);
3577
3578 content = sl_get_content(rval_open);
3579 content = sh_string_copy(content);
3580
3581 if ((theFile->check_mask & MODI_SGROW) != 0)
3582 {
3583 fbuf.st_size = (off_t) length_nolim;
3584 buf.st_size = fbuf.st_size;
3585 sl_rewind(rval_open);
3586 sh_unix_checksum_size (theFile->fullpath, &fbuf,
3587 &fileHash[KEY_LEN + 1],
3588 alert_timeout, rval_open);
3589 }
3590 }
3591 }
3592 }
3593
3594 /* --- case 4: a regular file, fstat failed ---
3595 */
3596
3597 else /* fstat_return != 0 or !S_ISREG(fbuf.st_mode) or open() failed */
3598 {
3599 uid_t euid;
3600
3601 if (fileHash != NULL)
3602 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3603
3604 if ((theFile->check_mask & MODI_CHK) != 0)
3605 {
3606 tmp2 = sh_util_safe_name (theFile->fullpath);
3607
3608
3609 if (fd >= 0 && fstat_return != 0)
3610 {
3611 char errbuf[SH_ERRBUF_SIZE];
3612 (void) sl_get_euid(&euid);
3613
3614 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
3615 _("fstat"),
3616 sh_error_message (fstat_errno, errbuf, sizeof(errbuf)),
3617 (long) euid,
3618 tmp2);
3619 }
3620 else if (fd >= 0 && !S_ISREG(fbuf.st_mode))
3621 {
3622 sh_error_handle (level, FIL__, __LINE__, fstat_errno,
3623 MSG_E_NOTREG, tmp2);
3624 }
3625 else
3626 {
3627 char errbuf[SH_ERRBUF_SIZE];
3628 char errbuf2[SH_ERRBUF_SIZE];
3629 sl_strlcpy(errbuf, sl_error_string(rval_open), sizeof(errbuf));
3630 sh_error_message(err_open, errbuf2, sizeof(errbuf2));
3631 sh_error_handle (level, FIL__, __LINE__, err_open,
3632 MSG_E_READ, errbuf, errbuf2, tmp2);
3633 }
3634 SH_FREE(tmp2);
3635 }
3636 }
3637
3638
3639 /* --- Determine file type. ---
3640 */
3641 memset (theFile->c_mode, '-', CMODE_SIZE-1);
3642 theFile->c_mode[CMODE_SIZE-1] = '\0';
3643
3644 memset (theFile->link_c_mode, '-', CMODE_SIZE-1);
3645 theFile->link_c_mode[CMODE_SIZE-1] = '\0';
3646
3647 sh_unix_getinfo_type (&buf, &type, theFile->c_mode);
3648 theFile->type = type;
3649
3650#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
3651
3652 /* --- Determine file attributes. ---
3653 */
3654 memset (theFile->c_attributes, '-', ATTRBUF_SIZE);
3655 theFile->c_attributes[ATTRBUF_USED] = '\0';
3656 theFile->attributes = 0;
3657
3658 if (theFile->c_mode[0] != 'c' && theFile->c_mode[0] != 'b' &&
3659 theFile->c_mode[0] != 'l' )
3660 sh_unix_getinfo_attr(theFile->fullpath,
3661 &theFile->attributes, theFile->c_attributes,
3662 fd, &buf);
3663#endif
3664
3665#if defined(USE_XATTR) && defined(USE_ACL)
3666 if (sh_unix_check_selinux == S_TRUE || sh_unix_check_acl == S_TRUE)
3667 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
3668#elif defined(USE_XATTR)
3669 if (sh_unix_check_selinux == S_TRUE)
3670 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
3671#elif defined(USE_ACL)
3672 if (sh_unix_check_acl == S_TRUE)
3673 theFile->attr_string = sh_unix_getinfo_acl (theFile->fullpath, fd, &buf);
3674#else
3675 theFile->attr_string = NULL;
3676#endif
3677
3678 if (!SL_ISERROR(rval_open))
3679 sl_close(rval_open);
3680
3681
3682 /* --- I/O limit. ---
3683 */
3684 if (IO_Limit > 0)
3685 {
3686 runtim = (long) (time(NULL) - sh.statistics.time_start);
3687
3688 if (runtim > 0 && (long)(sh.statistics.bytes_hashed/runtim) > IO_Limit)
3689 retry_msleep(1, 0);
3690 }
3691
3692 /* --- Determine permissions. ---
3693 */
3694 sh_unix_getinfo_mode (&buf, &mode, theFile->c_mode);
3695
3696 /* --- Trivia. ---
3697 */
3698 theFile->dev = buf.st_dev;
3699 theFile->ino = buf.st_ino;
3700 theFile->mode = buf.st_mode;
3701 theFile->hardlinks = buf.st_nlink;
3702 theFile->owner = buf.st_uid;
3703 theFile->group = buf.st_gid;
3704 theFile->rdev = buf.st_rdev;
3705 theFile->size = buf.st_size;
3706 theFile->blksize = (unsigned long) buf.st_blksize;
3707 theFile->blocks = (unsigned long) buf.st_blocks;
3708 theFile->atime = buf.st_atime;
3709 theFile->mtime = buf.st_mtime;
3710 theFile->ctime = buf.st_ctime;
3711
3712
3713 /* --- Owner and group. ---
3714 */
3715
3716 if (NULL == sh_unix_getGIDname(SH_ERR_ALL, buf.st_gid, theFile->c_group, GROUP_MAX+1)) {
3717
3718 tmp2 = sh_util_safe_name (theFile->fullpath);
3719
3720 if (policy == SH_LEVEL_ALLIGNORE)
3721 {
3722 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
3723 MSG_FI_NOGRP,
3724 (long) buf.st_gid, tmp2);
3725 }
3726 else
3727 {
3728 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
3729 MSG_FI_NOGRP,
3730 (long) buf.st_gid, tmp2);
3731 }
3732 SH_FREE(tmp2);
3733 sl_snprintf(theFile->c_group, GROUP_MAX+1, "%d", (long) buf.st_gid);
3734 }
3735
3736
3737 if (NULL == sh_unix_getUIDname(SH_ERR_ALL, buf.st_uid, theFile->c_owner, USER_MAX+1)) {
3738
3739 tmp2 = sh_util_safe_name (theFile->fullpath);
3740
3741 if (policy == SH_LEVEL_ALLIGNORE)
3742 {
3743 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
3744 MSG_FI_NOUSR,
3745 (long) buf.st_uid, tmp2);
3746 }
3747 else
3748 {
3749 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
3750 MSG_FI_NOUSR,
3751 (long) buf.st_uid, tmp2);
3752 }
3753 SH_FREE(tmp2);
3754 sl_snprintf(theFile->c_owner, USER_MAX+1, "%d", (long) buf.st_uid);
3755 }
3756
3757 /* --- Output the file. ---
3758 */
3759 if (flag_err_debug == SL_TRUE)
3760 {
3761 tmp2 = sh_util_safe_name ((filename == NULL) ?
3762 theFile->fullpath : filename);
3763 (void) sh_unix_time(theFile->mtime, timestr, sizeof(timestr));
3764 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LIST,
3765 theFile->c_mode,
3766 theFile->hardlinks,
3767 theFile->c_owner,
3768 theFile->c_group,
3769 (unsigned long) theFile->size,
3770 timestr,
3771 tmp2);
3772 SH_FREE(tmp2);
3773 }
3774
3775 /* --- Check for links. ---
3776 */
3777 if (theFile->c_mode[0] == 'l')
3778 {
3779 linknamebuf = SH_ALLOC(PATH_MAX);
3780
3781 /* flawfinder: ignore */
3782 linksize = readlink (theFile->fullpath, linknamebuf, PATH_MAX-1);
3783
3784 if (linksize < (PATH_MAX-1) && linksize >= 0)
3785 linknamebuf[linksize] = '\0';
3786 else
3787 linknamebuf[PATH_MAX-1] = '\0';
3788
3789 if (linksize < 0)
3790 {
3791 char errbuf[SH_ERRBUF_SIZE];
3792 linksize = errno;
3793 tmp2 = sh_util_safe_name (theFile->fullpath);
3794 sh_error_handle (level, FIL__, __LINE__, linksize, MSG_FI_RDLNK,
3795 sh_error_message (linksize, errbuf, sizeof(errbuf)), tmp2);
3796 SH_FREE(tmp2);
3797 SH_FREE(linknamebuf);
3798 theFile->link_path = sh_util_strdup("-");
3799 SL_RETURN((-1),_("sh_unix_getinfo"));
3800 }
3801
3802 if (linknamebuf[0] == '/')
3803 {
3804 theFile->link_path = sh_util_strdup (linknamebuf);
3805 }
3806 else
3807 {
3808 tmp = sh_util_dirname(theFile->fullpath);
3809 if (tmp) {
3810 theFile->link_path = SH_ALLOC(PATH_MAX);
3811 sl_strlcpy (theFile->link_path, tmp, PATH_MAX);
3812 SH_FREE(tmp);
3813 } else {
3814 theFile->link_path = SH_ALLOC(PATH_MAX);
3815 theFile->link_path[0] = '\0';
3816 }
3817 /*
3818 * Only attach '/' if not root directory. Handle "//", which
3819 * according to POSIX is implementation-defined, and may be
3820 * different from "/" (however, three or more '/' will collapse
3821 * to one).
3822 */
3823 tmp = theFile->link_path; while (*tmp == '/') ++tmp;
3824 if (*tmp != '\0')
3825 {
3826 sl_strlcat (theFile->link_path, "/", PATH_MAX);
3827 }
3828 sl_strlcat (theFile->link_path, linknamebuf, PATH_MAX);
3829 }
3830
3831 /* stat the link
3832 */
3833 stat_return = retry_lstat (FIL__, __LINE__, theFile->link_path, &lbuf);
3834
3835 /* check for error
3836 */
3837 if (stat_return != 0)
3838 {
3839 stat_return = errno;
3840 tmp = sh_util_safe_name (theFile->fullpath);
3841 tmp2 = sh_util_safe_name (theFile->link_path);
3842 if (stat_return != ENOENT)
3843 {
3844 uid_t euid;
3845 char errbuf[SH_ERRBUF_SIZE];
3846
3847 (void) sl_get_euid(&euid);
3848 sh_error_handle (level, FIL__, __LINE__, stat_return,
3849 MSG_FI_STAT,
3850 _("lstat"),
3851 sh_error_message (stat_return,errbuf, sizeof(errbuf)),
3852 (long) euid,
3853 tmp2);
3854 }
3855 else
3856 {
3857 /* a dangling link -- everybody seems to have plenty of them
3858 */
3859 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_DLNK,
3860 tmp, tmp2);
3861 }
3862 theFile->linkisok = BAD;
3863 SH_FREE(tmp);
3864 SH_FREE(tmp2);
3865 SH_FREE(linknamebuf);
3866 /*
3867 * changed Tue Feb 10 16:16:13 CET 2004:
3868 * add dangling symlinks into database
3869 * SL_RETURN((-1),_("sh_unix_getinfo"));
3870 */
3871 theFile->linkmode = 0;
3872 SL_RETURN((0),_("sh_unix_getinfo"));
3873 }
3874
3875 theFile->linkisok = GOOD;
3876
3877
3878 /* --- Determine file type. ---
3879 */
3880 sh_unix_getinfo_type (&lbuf, &type, theFile->link_c_mode);
3881 theFile->type = type;
3882
3883 /* --- Determine permissions. ---
3884 */
3885 sh_unix_getinfo_mode (&lbuf, &mode, theFile->link_c_mode);
3886 theFile->linkmode = lbuf.st_mode;
3887
3888 /* --- Output the link. ---
3889 */
3890 if (theFile->linkisok == GOOD)
3891 {
3892 tmp2 = sh_util_safe_name (linknamebuf);
3893 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LLNK,
3894 theFile->link_c_mode, tmp2);
3895 SH_FREE(tmp2);
3896 }
3897 SH_FREE(linknamebuf);
3898 }
3899 else /* not a link */
3900 {
3901 if (content)
3902 {
3903#ifdef HAVE_LIBZ
3904 unsigned long clen;
3905 unsigned char * compressed;
3906#ifdef HAVE_COMPRESSBOUND
3907 clen = compressBound(sh_string_len(content));
3908#else
3909 if (sh_string_len(content) > 10*SH_TXT_MAX)
3910 clen = SH_TXT_MAX;
3911 else
3912 clen = 13 + (int)(1.0001*sh_string_len(content));
3913#endif
3914 compressed = SH_ALLOC(clen);
3915 if (Z_OK == compress(compressed, &clen,
3916 (unsigned char *) sh_string_str(content),
3917 sh_string_len(content)))
3918 {
3919 if (clen < SH_TXT_MAX)
3920 {
3921 sh_util_base64_enc_alloc (&(theFile->link_path),
3922 (char *) compressed, clen);
3923 }
3924 else
3925 {
3926 char tmsg[128];
3927 char * tpath = sh_util_safe_name (theFile->fullpath);
3928 sl_snprintf(tmsg, sizeof(tmsg),
3929 _("compressed file too large (%lu bytes)"),
3930 clen);
3931 sh_error_handle (SH_ERR_WARN, FIL__, __LINE__, -1,
3932 MSG_E_SUBGPATH, tmsg,
3933 _("sh_unix_getinfo"), tpath);
3934 SH_FREE(tpath);
3935 }
3936 }
3937 SH_FREE(compressed);
3938#endif
3939 sh_string_destroy(&content);
3940 }
3941 }
3942 SL_RETURN((0),_("sh_unix_getinfo"));
3943}
3944
3945/* #if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE) */
3946#endif
3947
3948int sh_unix_unlock(char * lockfile, char * flag)
3949{
3950 int error = 0;
3951
3952 SL_ENTER(_("sh_unix_unlock"));
3953
3954 if (sh.flag.isdaemon == S_FALSE && flag == NULL)
3955 SL_RETURN((0),_("sh_unix_unlock"));
3956
3957 /* --- Logfile is not locked to us. ---
3958 */
3959 if (sh.flag.islocked == BAD && flag != NULL)
3960 SL_RETURN((-1),_("sh_unix_unlock"));
3961
3962 /* --- Check whether the directory is secure. ---
3963 */
3964 if (0 != tf_trust_check (lockfile, SL_YESPRIV))
3965 SL_RETURN((-1),_("sh_unix_unlock"));
3966
3967 /* --- Delete the lock file. ---
3968 */
3969 error = retry_aud_unlink (FIL__, __LINE__, lockfile);
3970
3971 if (error == 0)
3972 {
3973 if (flag != NULL)
3974 sh.flag.islocked = BAD; /* not locked anymore */
3975 }
3976 else if (flag != NULL)
3977 {
3978 char errbuf[SH_ERRBUF_SIZE];
3979 error = errno;
3980 sh_error_handle ((-1), FIL__, __LINE__, error, MSG_E_UNLNK,
3981 sh_error_message(error, errbuf, sizeof(errbuf)),
3982 lockfile);
3983 SL_RETURN((-1),_("sh_unix_unlock"));
3984 }
3985 SL_RETURN((0),_("sh_unix_unlock"));
3986}
3987
3988int sh_unix_lock (char * lockfile, char * flag)
3989{
3990 int filed;
3991 int errnum;
3992 char myPid[64];
3993 SL_TICKET fd;
3994 extern int get_the_fd (SL_TICKET ticket);
3995
3996 SL_ENTER(_("sh_unix_lock"));
3997
3998 sprintf (myPid, "%ld\n", (long) sh.pid); /* known to fit */
3999
4000 fd = sl_open_safe_rdwr (lockfile, SL_YESPRIV); /* fails if file exists */
4001
4002 if (!SL_ISERROR(fd))
4003 {
4004 errnum = sl_write (fd, myPid, sl_strlen(myPid));
4005 filed = get_the_fd(fd);
4006 fchmod (filed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
4007 sl_close (fd);
4008
4009 if (!SL_ISERROR(errnum))
4010 {
4011 if (flag != NULL)
4012 sh.flag.islocked = GOOD;
4013 SL_RETURN((0),_("sh_unix_lock"));
4014 }
4015 }
4016
4017 TPT((0, FIL__, __LINE__, _("msg=<open pid file failed>\n")));
4018 if (flag != NULL)
4019 sh.flag.islocked = BAD;
4020 SL_RETURN((-1),_("sh_unix_lock"));
4021
4022 /* notreached */
4023}
4024
4025
4026/* check whether file is locked
4027 */
4028int sh_unix_test_and_lock (char * filename, char * lockfile)
4029{
4030 static struct stat buf;
4031 int status = 0;
4032
4033
4034 SL_TICKET fd;
4035 char line_in[128];
4036
4037 SL_ENTER(_("sh_unix_test_and_lock"));
4038
4039 status = retry_lstat (FIL__, __LINE__, lockfile, &buf);
4040
4041 /* --- No lock file found, try to lock. ---
4042 */
4043
4044 if (status < 0 && errno == ENOENT)
4045 {
4046 if (0 == sh_unix_lock (lockfile, filename))
4047 {
4048 if (filename != NULL)
4049 sh.flag.islocked = GOOD;
4050 SL_RETURN((0),_("sh_unix_test_and_lock"));
4051 }
4052 else
4053 {
4054 sh_error_handle ((-1), FIL__, __LINE__, status,
4055 MSG_E_SUBGEN,
4056 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
4057 _("sh_unix_test_and_lock"));
4058 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4059 }
4060 }
4061 else if (status == 0 && buf.st_size == 0)
4062 {
4063 if (filename != NULL)
4064 sh.flag.islocked = GOOD;
4065 sh_unix_unlock (lockfile, filename);
4066 if (filename != NULL)
4067 sh.flag.islocked = BAD;
4068 if (0 == sh_unix_lock (lockfile, filename))
4069 {
4070 if (filename != NULL)
4071 sh.flag.islocked = GOOD;
4072 SL_RETURN((0),_("sh_unix_test_and_lock"));
4073 }
4074 else
4075 {
4076 sh_error_handle ((-1), FIL__, __LINE__, status,
4077 MSG_E_SUBGEN,
4078 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
4079 _("sh_unix_test_and_lock"));
4080 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4081 }
4082 }
4083
4084 /* --- Check on lock. ---
4085 */
4086
4087 if (status >= 0)
4088 {
4089 fd = sl_open_read (lockfile, SL_YESPRIV);
4090 if (SL_ISERROR(fd))
4091 sh_error_handle ((-1), FIL__, __LINE__, fd,
4092 MSG_E_SUBGEN,
4093 (filename == NULL) ? _("Cannot open PID file for read") : _("Cannot open lock file for read"),
4094 _("sh_unix_test_and_lock"));
4095 }
4096 else
4097 fd = -1;
4098
4099 if (!SL_ISERROR(fd))
4100 {
4101 /* read the PID in the lock file
4102 */
4103 status = sl_read (fd, line_in, sizeof(line_in));
4104 line_in[sizeof(line_in)-1] = '\0';
4105
4106 /* convert to numeric
4107 */
4108 if (status > 0)
4109 {
4110 errno = 0;
4111 status = strtol(line_in, (char **)NULL, 10);
4112 if (errno == ERANGE || status <= 0)
4113 {
4114 sh_error_handle ((-1), FIL__, __LINE__, status,
4115 MSG_E_SUBGEN,
4116 (filename == NULL) ? _("Bad PID in PID file") : _("Bad PID in lock file"),
4117 _("sh_unix_test_and_lock"));
4118
4119 status = -1;
4120 }
4121 }
4122 else
4123 {
4124 sh_error_handle ((-1), FIL__, __LINE__, status,
4125 MSG_E_SUBGEN,
4126 (filename == NULL) ? _("Cannot read PID file") : _("Cannot read lock file"),
4127 _("sh_unix_test_and_lock"));
4128 }
4129 sl_close(fd);
4130
4131 if (status > 0 && (unsigned int) status == sh.pid)
4132 {
4133 if (filename != NULL)
4134 sh.flag.islocked = GOOD;
4135 SL_RETURN((0),_("sh_unix_test_and_lock"));
4136 }
4137
4138
4139 /* --- Check whether the process exists. ---
4140 */
4141 if (status > 0)
4142 {
4143 errno = 0;
4144 status = aud_kill (FIL__, __LINE__, status, 0);
4145
4146 /* Does not exist, so remove the stale lock
4147 * and create a new one.
4148 */
4149 if (status < 0 && errno == ESRCH)
4150 {
4151 if (filename != NULL)
4152 sh.flag.islocked = GOOD;
4153 if (0 != sh_unix_unlock(lockfile, filename) && (filename !=NULL))
4154 sh.flag.islocked = BAD;
4155 else
4156 {
4157 if (0 == sh_unix_lock (lockfile, filename))
4158 {
4159 if (filename != NULL)
4160 sh.flag.islocked = GOOD;
4161 SL_RETURN((0),_("sh_unix_test_and_lock"));
4162 }
4163 else
4164 {
4165 sh_error_handle ((-1), FIL__, __LINE__, status,
4166 MSG_E_SUBGEN,
4167 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
4168 _("sh_unix_test_and_lock"));
4169 }
4170 if (filename != NULL)
4171 sh.flag.islocked = BAD;
4172 }
4173 }
4174 else
4175 {
4176 sh_error_handle ((-1), FIL__, __LINE__, status,
4177 MSG_E_SUBGEN,
4178 (filename == NULL) ? _("Cannot remove stale PID file, PID may be a running process") : _("Cannot remove stale lock file, PID may be a running process"),
4179 _("sh_unix_test_and_lock"));
4180 if (filename != NULL)
4181 sh.flag.islocked = BAD;
4182 }
4183 }
4184 }
4185 SL_RETURN((-1),_("sh_unix_testlock"));
4186}
4187
4188/* write the PID file
4189 */
4190int sh_unix_write_pid_file()
4191{
4192 return sh_unix_test_and_lock(NULL, sh.srvlog.alt);
4193}
4194
4195/* write lock for filename
4196 */
4197int sh_unix_write_lock_file(char * filename)
4198{
4199 size_t len;
4200 int res;
4201 char * lockfile;
4202
4203 if (filename == NULL)
4204 return (-1);
4205
4206 len = sl_strlen(filename);
4207 if (sl_ok_adds(len, 6))
4208 len += 6;
4209 lockfile = SH_ALLOC(len);
4210 sl_strlcpy(lockfile, filename, len);
4211 sl_strlcat(lockfile, _(".lock"), len);
4212 res = sh_unix_test_and_lock(filename, lockfile);
4213 SH_FREE(lockfile);
4214 return res;
4215}
4216
4217/* rm lock for filename
4218 */
4219int sh_unix_rm_lock_file(char * filename)
4220{
4221 size_t len;
4222 int res;
4223 char * lockfile;
4224
4225 if (filename == NULL)
4226 return (-1);
4227
4228 len = sl_strlen(filename);
4229 if (sl_ok_adds(len, 6))
4230 len += 6;
4231 lockfile = SH_ALLOC(len);
4232 sl_strlcpy(lockfile, filename, len);
4233 sl_strlcat(lockfile, _(".lock"), len);
4234
4235 res = sh_unix_unlock(lockfile, filename);
4236 SH_FREE(lockfile);
4237 return res;
4238}
4239
4240/* rm lock for filename
4241 */
4242int sh_unix_rm_pid_file()
4243{
4244 return sh_unix_unlock(sh.srvlog.alt, NULL);
4245}
4246
4247/* Test whether file exists
4248 */
4249int sh_unix_file_exists(char * path)
4250{
4251 struct stat buf;
4252
4253 SL_ENTER(_("sh_unix_file_exists"));
4254
4255 if (-1 == retry_stat(FIL__, __LINE__, path, &buf))
4256 SL_RETURN( S_FALSE, _("sh_unix_file_exists"));
4257 else
4258 SL_RETURN( S_TRUE, _("sh_unix_file_exists"));
4259}
4260
4261
4262/* Test whether file exists, is a character device, and allows read
4263 * access.
4264 */
4265int sh_unix_device_readable(int fd)
4266{
4267 struct stat buf;
4268
4269 SL_ENTER(_("sh_unix_device_readable"));
4270
4271 if (retry_fstat(FIL__, __LINE__, fd, &buf) == -1)
4272 SL_RETURN( (-1), _("sh_unix_device_readable"));
4273 else if ( S_ISCHR(buf.st_mode) && 0 != (S_IROTH & buf.st_mode) )
4274 SL_RETURN( (0), _("sh_unix_device_readable"));
4275 else
4276 SL_RETURN( (-1), _("sh_unix_device_readable"));
4277}
4278
4279static char preq[16];
4280
4281/* return true if database is remote
4282 */
4283int file_is_remote ()
4284{
4285 static int init = 0;
4286 struct stat buf;
4287
4288 SL_ENTER(_("file_is_remote"));
4289
4290 if (init == 0)
4291 {
4292 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4293 ++init;
4294 }
4295 if (0 == sl_strncmp (sh.data.path, preq, 15))
4296 {
4297 if (sh.data.path[15] != '\0') /* should be start of path */
4298 {
4299 if (0 == stat(&(sh.data.path[15]), &buf))
4300 {
4301 SL_RETURN( S_FALSE, _("file_is_remote"));
4302 }
4303 }
4304 SL_RETURN( S_TRUE, _("file_is_remote"));
4305 }
4306 SL_RETURN( S_FALSE, _("file_is_remote"));
4307}
4308
4309/* Return the path to the configuration/database file.
4310 */
4311char * file_path(char what, char flag)
4312{
4313 static int init = 0;
4314
4315 SL_ENTER(_("file_path"));
4316
4317 if (init == 0)
4318 {
4319 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4320 ++init;
4321 }
4322
4323 switch (what)
4324 {
4325
4326 case 'C':
4327 if (0 == sl_strncmp (sh.conf.path, preq, 15))
4328 {
4329#if defined(SH_WITH_SERVER)
4330 if (sh.flag.isserver == S_TRUE && sl_strlen(sh.conf.path) == 15)
4331 SL_RETURN( NULL, _("file_path"));
4332 if (sh.flag.isserver == S_TRUE)
4333 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4334#endif
4335 if (flag == 'R')
4336 SL_RETURN( preq, _("file_path"));
4337 if (flag == 'I')
4338 {
4339 if (sl_strlen(sh.conf.path) == 15)
4340 SL_RETURN( NULL, _("file_path"));
4341 else
4342 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4343 }
4344 SL_RETURN ( preq, _("file_path"));
4345 }
4346 else
4347 SL_RETURN( sh.conf.path, _("file_path"));
4348 /* break; *//* unreachable */
4349
4350 case 'D':
4351 if (0 == sl_strncmp (sh.data.path, preq, 15))
4352 {
4353 if (flag == 'R')
4354 SL_RETURN( preq, _("file_path"));
4355 if (flag == 'W' && sl_strlen(sh.data.path) == 15)
4356 SL_RETURN (NULL, _("file_path"));
4357 if (flag == 'W')
4358 SL_RETURN( &(sh.data.path[15]), _("file_path"));
4359 }
4360 else
4361 SL_RETURN( sh.data.path, _("file_path"));
4362 break;
4363
4364 default:
4365 SL_RETURN( NULL, _("file_path"));
4366 }
4367
4368 return NULL; /* notreached */
4369}
4370/************************************************/
4371/**** Mlock Utilities ****/
4372/************************************************/
4373
4374#include <limits.h>
4375
4376int sh_unix_pagesize()
4377{
4378 int pagesize = 4096;
4379#if defined(_SC_PAGESIZE)
4380 pagesize = sysconf(_SC_PAGESIZE);
4381#elif defined(_SC_PAGE_SIZE)
4382 pagesize = sysconf(_SC_PAGE_SIZE);
4383#elif defined(HAVE_GETPAGESIZE)
4384 pagesize = getpagesize();
4385#elif defined(PAGESIZE)
4386 pagesize = PAGESIZE;
4387#endif
4388
4389 return ((pagesize > 0) ? pagesize : 4096);
4390}
4391
4392typedef struct sh_page_lt {
4393 unsigned long page_start;
4394 int page_refcount;
4395 char file[64];
4396 int line;
4397 struct sh_page_lt * next;
4398} sh_page_l;
4399
4400sh_page_l * sh_page_locked = NULL;
4401volatile int page_locking = 0;
4402
4403unsigned long sh_unix_lookup_page (void * in_addr, size_t len, int * num_pages)
4404{
4405 int pagesize = sh_unix_pagesize();
4406 unsigned long addr = (unsigned long) in_addr;
4407
4408 unsigned long pagebase;
4409 unsigned long pagediff;
4410 unsigned long pagenum = addr / pagesize;
4411
4412 SL_ENTER(_("sh_unix_lookup_page"));
4413#if 0
4414 fprintf(stderr, "mlock: --> base %ld, pagenum: %ld\n",
4415 addr, pagenum);
4416#endif
4417
4418 /* address of first page
4419 */
4420 pagebase = pagenum * pagesize;
4421
4422 /* number of pages
4423 */
4424 pagediff = (addr + len) - pagebase;
4425 pagenum = pagediff / pagesize;
4426 if (pagenum * pagesize < pagediff)
4427 ++pagenum;
4428
4429#if 0
4430 fprintf(stderr, "mlock: --> pagebase %ld, pagediff %ld, (addr + len) %ld\n",
4431 pagebase, pagediff, (addr + len));
4432#endif
4433
4434 *num_pages = pagenum;
4435 SL_RETURN((pagebase), _("sh_unix_lookup_page"));
4436}
4437
4438
4439#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
4440
4441SH_MUTEX_STATIC(mutex_mlock,PTHREAD_MUTEX_INITIALIZER);
4442
4443int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
4444{
4445 int num_pages;
4446 int status = 0;
4447 int pagesize;
4448 sh_page_l * page_list = sh_page_locked;
4449 unsigned long addr;
4450#ifdef TEST_MLOCK
4451 int i = 0;
4452#endif
4453
4454 SL_ENTER(_("sh_unix_mlock"));
4455
4456 /* There's no cancellation point here, except if tracing is on
4457 */
4458 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
4459
4460 if (0 != page_locking)
4461 {
4462 status = -1;
4463 goto exit_mlock;
4464 }
4465
4466 page_locking = 1;
4467
4468 pagesize = sh_unix_pagesize();
4469 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
4470
4471#ifdef TEST_MLOCK
4472 fprintf(stderr, "mlock: addr %ld, base %ld, pages: %d, length %d\n",
4473 (unsigned long) in_addr, addr, num_pages, len);
4474#endif
4475
4476 /* increase refcount of locked pages
4477 * addr is first page; num_pages is #(consecutive pages) to lock
4478 */
4479
4480 while ((page_list != NULL) && (num_pages > 0))
4481 {
4482#ifdef TEST_MLOCK
4483 fprintf(stderr, "mlock: check page %d: %ld [%d]\n",
4484 i, page_list->page_start, page_list->page_refcount);
4485#endif
4486 if (page_list->page_start == addr)
4487 {
4488 page_list->page_refcount += 1;
4489 num_pages -= 1;
4490 addr += pagesize;
4491#ifdef TEST_MLOCK
4492 fprintf(stderr, "mlock: found page %d: %ld [%d], next page %ld\n",
4493 i, page_list->page_start, page_list->page_refcount, addr);
4494#endif
4495 }
4496#ifdef TEST_MLOCK
4497 ++i;
4498#endif
4499 page_list = page_list->next;
4500 }
4501
4502 /* mlock some more pages, if needed
4503 */
4504 while (num_pages > 0)
4505 {
4506#ifdef TEST_MLOCK
4507 fprintf(stderr, "mlock: lock page %d: mlock %ld [num_pages %d]\n",
4508 i, addr, num_pages);
4509 ++i;
4510#endif
4511 page_list = SH_ALLOC(sizeof(sh_page_l));
4512 page_list->page_start = addr;
4513 page_list->page_refcount = 1;
4514 sl_strlcpy(page_list->file, file, 64);
4515 page_list->line = line;
4516 status = mlock( (void *) addr, pagesize);
4517 if (status != 0)
4518 {
4519#ifdef TEST_MLOCK
4520 char errbuf[SH_ERRBUF_SIZE];
4521 fprintf(stderr, "mlock: error: %s\n",
4522 sh_error_message(errno, errbuf, sizeof(errbuf)));
4523#endif
4524 SH_FREE(page_list);
4525 page_locking = 0;
4526 goto exit_mlock;
4527 }
4528 page_list->next = sh_page_locked;
4529 sh_page_locked = page_list;
4530 num_pages -= 1;
4531 addr += pagesize;
4532 }
4533 page_locking = 0;
4534
4535 exit_mlock:
4536 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
4537
4538 SL_RETURN((status), _("sh_unix_mlock"));
4539}
4540#else
4541int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
4542{
4543 (void) file; (void) line;
4544 (void) in_addr; (void) len;
4545 return -1;
4546}
4547#endif
4548
4549#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
4550int sh_unix_munlock (void * in_addr, size_t len)
4551{
4552 int num_pages;
4553 int unlocked = 0;
4554 int status = 0;
4555 int pagesize;
4556 sh_page_l * page_list = sh_page_locked;
4557 sh_page_l * page_last;
4558 unsigned long addr;
4559
4560 int test_count;
4561 int test_status;
4562 int test_pages;
4563
4564#ifdef TEST_MLOCK
4565 int i = 0;
4566#endif
4567
4568 SL_ENTER(_("sh_unix_munlock"));
4569
4570 /* There's no cancellation point here, except if tracing is on
4571 */
4572 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
4573
4574 if (0 != page_locking)
4575 {
4576 status = -1;
4577 goto exit_munlock;
4578 }
4579 page_locking = 1;
4580
4581 pagesize = sh_unix_pagesize();
4582 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
4583
4584#ifdef TEST_MLOCK
4585 fprintf(stderr, "munlock: in_addr %ld, addr %ld, pages: %d, length %d\n",
4586 (unsigned long) in_addr, addr, num_pages, len);
4587#endif
4588
4589 test_pages = num_pages;
4590
4591 /* reduce refcount of locked pages
4592 * addr is first page; num_pages is #(consecutive pages) to lock
4593 */
4594 while ((page_list != NULL) && (num_pages > 0))
4595 {
4596#ifdef TEST_MLOCK
4597 fprintf(stderr, "munlock: page %d: %ld [%d]\n",
4598 i, page_list->page_start, page_list->page_refcount);
4599#endif
4600
4601 test_status = 0;
4602 for (test_count = 0; test_count < test_pages; ++test_count)
4603 {
4604 if (page_list->page_start == (addr + (test_count * pagesize)))
4605 {
4606 test_status = 1;
4607 break;
4608 }
4609 }
4610
4611 if (test_status == 1)
4612 {
4613 page_list->page_refcount -= 1;
4614 if (page_list->page_refcount == 0)
4615 {
4616 status = munlock ( (void *) addr, pagesize);
4617 ++unlocked;
4618 }
4619 num_pages -= 1;
4620#ifdef TEST_MLOCK
4621 fprintf(stderr,
4622 "munlock: page %d: %ld [refcount %d], refcount reduced\n",
4623 i, page_list->page_start, page_list->page_refcount);
4624#endif
4625 }
4626#ifdef TEST_MLOCK
4627 ++i;
4628#endif
4629 page_list = page_list->next;
4630 }
4631
4632#ifdef TEST_MLOCK
4633 i = 0;
4634#endif
4635
4636 if (unlocked > 0)
4637 {
4638 page_list = sh_page_locked;
4639 page_last = sh_page_locked;
4640
4641 while ((page_list != NULL) && (unlocked > 0))
4642 {
4643 if (page_list->page_refcount == 0)
4644 {
4645#ifdef TEST_MLOCK
4646 fprintf(stderr, "munlock: remove page %d: %ld [refcount %d]\n",
4647 i, page_list->page_start, page_list->page_refcount);
4648#endif
4649 if (page_last != page_list)
4650 {
4651 page_last->next = page_list->next;
4652 SH_FREE(page_list);
4653 page_list = page_last->next;
4654 }
4655 else
4656 {
4657 page_last = page_list->next;
4658 if (page_list == sh_page_locked)
4659 sh_page_locked = page_list->next;
4660 SH_FREE(page_list);
4661 page_list = page_last;
4662 }
4663 --unlocked;
4664 }
4665 else
4666 {
4667#ifdef TEST_MLOCK
4668 fprintf(stderr, "munlock: skip page %d: %ld [refcount %d]\n",
4669 i, page_list->page_start, page_list->page_refcount);
4670#endif
4671
4672 page_last = page_list;
4673 page_list = page_list->next;
4674 }
4675#ifdef TEST_MLOCK
4676 ++i;
4677#endif
4678 }
4679 }
4680
4681 page_locking = 0;
4682
4683 exit_munlock:
4684 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
4685 SL_RETURN((status), _("sh_unix_munlock"));
4686}
4687#else
4688int sh_unix_munlock (void * in_addr, size_t len)
4689{
4690 (void) in_addr; (void) len;
4691 return -1;
4692}
4693#endif
4694
4695int sh_unix_count_mlock()
4696{
4697 int i = 0;
4698 char str[128];
4699 sh_page_l * page_list = sh_page_locked;
4700
4701 SL_ENTER(_("sh_unix_count_mlock"));
4702 while (page_list != NULL)
4703 {
4704#ifdef WITH_TPT
4705 sl_snprintf(str, sizeof(str), _("file: %s line: %d page: %d"),
4706 page_list->file, page_list->line, i+1);
4707 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, i, MSG_E_SUBGEN,
4708 str, _("sh_unix_count_mlock"));
4709#endif
4710 page_list = page_list->next;
4711 ++i;
4712 }
4713 sl_snprintf(str, sizeof(str), _("%d pages locked"), i);
4714 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, i, MSG_E_SUBGEN,
4715 str, _("sh_unix_count_mlock"));
4716 SL_RETURN((i), _("sh_unix_count_mlock"));
4717}
4718
4719/************************************************/
4720/************************************************/
4721/**** Stealth Utilities ****/
4722/************************************************/
4723/************************************************/
4724#ifdef SH_STEALTH
4725
4726void sh_unix_xor_code (char * str, int len)
4727{
4728 register int i;
4729
4730 for (i = 0; i < len; ++i) str[i] ^= (char) XOR_CODE;
4731 return;
4732}
4733
4734#if !defined(SH_STEALTH_MICRO)
4735
4736
4737int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
4738 unsigned long * bytes_read);
4739unsigned long first_hex_block(SL_TICKET fd, unsigned long * max);
4740
4741/*
4742 * --- Get hidden data from a block of hex data. ---
4743 */
4744int sh_unix_getline_stealth (SL_TICKET fd, char * str, int len)
4745{
4746 int add_off = 0, llen;
4747 static unsigned long off_data = 0;
4748 static unsigned long max_data = 0;
4749 static unsigned long bytes_read = 0;
4750 static int stealth_init = BAD;
4751
4752 SL_ENTER(_("sh_unix_getline_stealth"));
4753
4754 if (str == NULL)
4755 {
4756 off_data = 0;
4757 max_data = 0;
4758 bytes_read = 0;
4759 stealth_init = BAD;
4760 SL_RETURN(0, _("sh_unix_getline_stealth"));
4761 }
4762
4763 /* --- Initialize. ---
4764 */
4765 if (stealth_init == BAD)
4766 {
4767 off_data = first_hex_block(fd, &max_data);
4768 if (off_data == 0)
4769 {
4770 dlog(1, FIL__, __LINE__,
4771 _("The stealth config file does not contain any steganographically\nhidden data. This file must be an image file in _uncompressed_\npostscript format.\nTo hide data in it, use:\n samhain_stealth -s postscript_file orig_config_file\n mv postscript_file /path/to/config/file\n"));
4772 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
4773 _("Stealth config file."));
4774 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
4775 }
4776 stealth_init = GOOD;
4777 max_data += off_data;
4778 }
4779
4780 /* --- Seek to proper position. ---
4781 */
4782 if (bytes_read >= max_data || add_off < 0)
4783 {
4784 dlog(1, FIL__, __LINE__,
4785 _("The capacity of the container image file for the stealth config file seems to be too small. Your config file is likely truncated.\n"));
4786 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
4787 _("Stealth config file."));
4788 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
4789 }
4790 sl_seek(fd, off_data);
4791
4792 /* --- Read one line. ---
4793 */
4794 add_off = hideout_hex_block(fd, (unsigned char *) str, len, &bytes_read);
4795 off_data += add_off;
4796
4797 llen = sl_strlen(str);
4798 SL_RETURN(llen, _("sh_unix_getline_stealth"));
4799}
4800
4801int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
4802 unsigned long * bytes_read)
4803{
4804
4805 register int i, j, k;
4806 unsigned char c, e;
4807 register int num;
4808 unsigned char mask[9] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
4809 unsigned long here = 0;
4810 unsigned long retval = 0;
4811 unsigned long bread = 0;
4812
4813 SL_ENTER(_("hideout_hex_block"));
4814
4815 ASSERT_RET((len > 1), _("len > 1"), (0));
4816
4817 --len;
4818
4819 i = 0;
4820 while (i < len)
4821 {
4822 for (j = 0; j < 8; ++j)
4823 {
4824
4825 /* --- Get a low byte, modify, read back. ---
4826 */
4827 for (k = 0; k < 2; ++k)
4828 {
4829 /* -- Skip whitespace. ---
4830 */
4831 c = ' ';
4832 do {
4833 do {
4834 num = sl_read (fd, &c, 1);
4835 } while (num == 0 && errno == EINTR);
4836 if (num > 0)
4837 ++here;
4838 else if (num == 0)
4839 SL_RETURN((0), _("hideout_hex_block"));
4840 else
4841 SL_RETURN((-1), _("hideout_hex_block"));
4842 } while (c == '\n' || c == '\t' || c == '\r' ||
4843 c == ' ');
4844 }
4845
4846
4847 /* --- e is the value of the low byte. ---
4848 */
4849 e = (unsigned char) sh_util_hexchar( c );
4850 if ((e & mask[7]) != 0) /* bit is set */
4851 str[i] |= mask[j];
4852 else /* bit is not set */
4853 str[i] &= ~mask[j];
4854
4855 bread += 1;
4856 }
4857 if (str[i] == '\n') break;
4858 ++i;
4859 }
4860
4861 if (i != 0)
4862 str[i] = '\0';
4863 else
4864 str[i+1] = '\0'; /* keep newline and terminate */
4865 retval += here;
4866 *bytes_read += (bread/8);
4867
4868 SL_RETURN(retval, _("hideout_hex_block"));
4869}
4870
4871/* --- Get offset of first data block. ---
4872 */
4873unsigned long first_hex_block(SL_TICKET fd, unsigned long * max)
4874{
4875 unsigned int i;
4876 long num = 1;
4877 unsigned long lnum;
4878 char c;
4879 int nothex = 0;
4880 unsigned long retval = 0;
4881 unsigned int this_line = 0;
4882 char theline[SH_BUFSIZE];
4883
4884 SL_ENTER(_("first_hex_block"));
4885
4886 *max = 0;
4887
4888 while (1)
4889 {
4890 theline[0] = '\0';
4891 this_line = 0;
4892 c = '\0';
4893 while (c != '\n' && num > 0 && this_line < (sizeof(theline)-1))
4894 {
4895 do {
4896 num = sl_read (fd, &c, 1);
4897 } while (num == 0 && errno == EINTR);
4898 if (num > 0)
4899 theline[this_line] = c;
4900 else
4901 SL_RETURN((0), _("first_hex_block"));
4902 ++this_line;
4903 }
4904 theline[this_line] = '\0';
4905
4906 /* not only 'newline' */
4907 if (this_line > 60)
4908 {
4909 nothex = 0;
4910 i = 0;
4911 while (nothex == 0 && i < (this_line-1))
4912 {
4913 if (! isxdigit((int)theline[i])) nothex = 1;
4914 ++i;
4915 }
4916 if (nothex == 1) retval += this_line;
4917 }
4918 else
4919 {
4920 nothex = 1;
4921 retval += this_line;
4922 }
4923
4924 if (nothex == 0)
4925 {
4926 *max = 0;
4927 do {
4928 do {
4929 num = sl_read (fd, theline, SH_BUFSIZE);
4930 } while (num == 0 && errno == EINTR);
4931 if (num > 0)
4932 {
4933 lnum = (unsigned long) num;
4934 for (i = 0; i < lnum; ++i)
4935 {
4936 c = theline[i];
4937 if (c == '\n' || c == '\t' || c == '\r' || c == ' ')
4938 ;
4939 else if (!isxdigit((int)c))
4940 break;
4941 else
4942 *max += 1;
4943 }
4944 }
4945 } while (num > 0);
4946
4947 *max /= 16;
4948 SL_RETURN((retval), _("first_hex_block"));
4949 }
4950
4951 }
4952 /* SL_RETURN((0), _("first_hex_block")); *//* unreachable */
4953}
4954
4955 /* if !defined(SH_STEALTH_MICRO) */
4956#endif
4957
4958 /* ifdef SH_STEALTH */
4959#endif
4960
4961/*
4962 * anti-debugger code
4963 */
4964#if defined(SCREW_IT_UP)
4965volatile int sh_not_traced = 0;
4966
4967#ifdef HAVE_GETTIMEOFDAY
4968struct timeval save_tv;
4969#endif
4970
4971void sh_sigtrap_handler (int signum)
4972{
4973#ifdef HAVE_GETTIMEOFDAY
4974 struct timeval tv;
4975 long difftv;
4976
4977 gettimeofday(&tv, NULL);
4978 difftv = (tv.tv_sec - save_tv.tv_sec) * 1000000 +
4979 (tv.tv_usec - save_tv.tv_usec);
4980 if (difftv > 500000)
4981 raise(SIGKILL);
4982#endif
4983 sh_not_traced += signum;
4984 return;
4985}
4986#endif
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