source: trunk/src/sh_unix.c@ 198

Last change on this file since 198 was 197, checked in by katerina, 17 years ago

Rewrite of code for conditionals in configuration file, supports more tests now (ticket #129).
File size: 116.1 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 _exit(EXIT_FAILURE);
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 _exit(mysignal);
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 _exit(mysignal);
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 _exit(mysignal);
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 SL_RET0(_("sh_unix_zeroenv"));
1454}
1455
1456
1457static void sh_unix_resettimer(void)
1458{
1459 struct itimerval this_timer;
1460
1461 SL_ENTER(_("sh_unix_resettimer"));
1462
1463 this_timer.it_value.tv_sec = 0;
1464 this_timer.it_value.tv_usec = 0;
1465
1466 this_timer.it_interval.tv_sec = 0;
1467 this_timer.it_interval.tv_usec = 0;
1468
1469 setitimer(ITIMER_REAL, &this_timer, NULL);
1470#if !defined(SH_PROFILE)
1471 setitimer(ITIMER_VIRTUAL, &this_timer, NULL);
1472 setitimer(ITIMER_PROF, &this_timer, NULL);
1473#endif
1474
1475 SL_RET0(_("sh_unix_resettimer"));
1476}
1477
1478static void sh_unix_resetsignals(void)
1479{
1480 int sig_num;
1481#ifdef NSIG
1482 int max_sig = NSIG;
1483#else
1484 int max_sig = 255;
1485#endif
1486 int test;
1487 struct sigaction act, oldact;
1488 int status;
1489
1490 sigset_t set_proc;
1491
1492 SL_ENTER(_("sh_unix_resetsignals"));
1493 /*
1494 * Reset the current signal mask (inherited from parent process).
1495 */
1496
1497 sigfillset(&set_proc);
1498
1499 do {
1500 errno = 0;
1501 test = sigprocmask(SIG_UNBLOCK, &set_proc, NULL);
1502 } while (test < 0 && errno == EINTR);
1503
1504 /*
1505 * Reset signal handling.
1506 */
1507
1508 act.sa_handler = SIG_DFL; /* signal action */
1509 sigemptyset( &act.sa_mask ); /* set an empty mask */
1510 act.sa_flags = 0; /* init sa_flags */
1511
1512 for (sig_num = 1; sig_num <= max_sig; ++sig_num)
1513 {
1514#if !defined(SH_PROFILE)
1515 test = retry_sigaction(FIL__, __LINE__, sig_num, &act, &oldact);
1516#else
1517 test = 0;
1518#endif
1519 if ((test == -1) && (errno != EINVAL))
1520 {
1521 char errbuf[SH_ERRBUF_SIZE];
1522 status = errno;
1523 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_SIG,
1524 sh_error_message (status, errbuf, sizeof(errbuf)), sig_num);
1525 }
1526 }
1527
1528 SL_RET0(_("sh_unix_resetsignals"));
1529}
1530
1531/* Get the local hostname (FQDN)
1532 */
1533#include <sys/socket.h>
1534
1535/* Required for BSD
1536 */
1537#ifdef HAVE_NETINET_IN_H
1538#include <netinet/in.h>
1539#endif
1540
1541#include <arpa/inet.h>
1542
1543char * sh_unix_h_name (struct hostent * host_entry)
1544{
1545 char ** p;
1546 if (strchr(host_entry->h_name, '.')) {
1547 return host_entry->h_name;
1548 } else {
1549 for (p = host_entry->h_aliases; *p; ++p) {
1550 if (strchr(*p, '.'))
1551 return *p;
1552 }
1553 }
1554 return host_entry->h_name;
1555}
1556
1557/* uname() on FreeBSD is broken, because the 'nodename' buf is too small
1558 * to hold a valid (leftmost) domain label.
1559 */
1560#if defined(HAVE_UNAME) && !defined(HOST_IS_FREEBSD)
1561#include <sys/utsname.h>
1562void sh_unix_localhost()
1563{
1564 struct utsname buf;
1565 struct hostent * he1;
1566 int i;
1567 int ddot;
1568 int len;
1569 char * p;
1570 char hostname[256];
1571
1572
1573 SL_ENTER(_("sh_unix_localhost"));
1574
1575 (void) uname (&buf);
1576 /* flawfinder: ignore */ /* ff bug, ff sees system() */
1577 sl_strlcpy (sh.host.system, buf.sysname, SH_MINIBUF);
1578 sl_strlcpy (sh.host.release, buf.release, SH_MINIBUF);
1579 sl_strlcpy (sh.host.machine, buf.machine, SH_MINIBUF);
1580
1581 /* Workaround for cases where nodename could be
1582 * a truncated FQDN.
1583 */
1584 if (strlen(buf.nodename) == (sizeof(buf.nodename)-1))
1585 {
1586 p = strchr(buf.nodename, '.');
1587 if (NULL != p) {
1588 *p = '\0';
1589 sl_strlcpy(hostname, buf.nodename, 256);
1590 } else {
1591#ifdef HAVE_GETHOSTNAME
1592 if (0 != gethostname(hostname, 256))
1593 {
1594 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1595 _("nodename returned by uname may be truncated"),
1596 _("sh_unix_localhost"));
1597 sl_strlcpy (hostname, buf.nodename, 256);
1598 }
1599 else
1600 {
1601 hostname[255] = '\0';
1602 }
1603#else
1604 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1605 _("nodename returned by uname may be truncated"),
1606 _("sh_unix_localhost"));
1607 sl_strlcpy(hostname, buf.nodename, 256);
1608#endif
1609 }
1610 }
1611 else
1612 {
1613 sl_strlcpy(hostname, buf.nodename, 256);
1614 }
1615
1616 SH_MUTEX_LOCK(mutex_resolv);
1617 he1 = sh_gethostbyname(hostname);
1618
1619 if (he1 != NULL)
1620 {
1621 sl_strlcpy (sh.host.name, sh_unix_h_name(he1), SH_PATHBUF);
1622 }
1623 SH_MUTEX_UNLOCK(mutex_resolv);
1624
1625 if (he1 == NULL)
1626 {
1627 dlog(1, FIL__, __LINE__,
1628 _("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"),
1629 hostname);
1630 sl_strlcpy (sh.host.name, hostname, SH_PATHBUF);
1631 }
1632
1633
1634 /* check whether it looks like a FQDN
1635 */
1636 len = sl_strlen(sh.host.name);
1637 ddot = 0;
1638 for (i = 0; i < len; ++i)
1639 if (sh.host.name[i] == '.') ++ddot;
1640
1641 if (ddot == 0 && he1 != NULL)
1642 {
1643 dlog(1, FIL__, __LINE__,
1644 _("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"),
1645 hostname, sh.host.name);
1646 sl_strlcpy (sh.host.name,
1647 inet_ntoa (*(struct in_addr *) he1->h_addr),
1648 SH_PATHBUF);
1649 SL_RET0(_("sh_unix_localhost"));
1650 }
1651
1652 if (is_numeric(sh.host.name))
1653 {
1654 dlog(1, FIL__, __LINE__,
1655 _("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"),
1656 hostname, sh.host.name);
1657 }
1658
1659 SL_RET0(_("sh_unix_localhost"));
1660}
1661#else
1662void sh_unix_localhost()
1663{
1664 struct hostent * he1;
1665 int i;
1666 int ddot;
1667 int len;
1668 char hostname[1024];
1669
1670
1671 SL_ENTER(_("sh_unix_localhost"));
1672
1673 (void) gethostname (hostname, 1024);
1674 hostname[1023] = '\0';
1675
1676 SH_MUTEX_LOCK(mutex_resolv);
1677 he1 = sh_gethostbyname(hostname);
1678
1679 if (he1 != NULL)
1680 {
1681 sl_strlcpy (sh.host.name, sh_unix_h_name(he1), SH_PATHBUF);
1682 }
1683 SH_MUTEX_UNLOCK(mutex_resolv);
1684
1685 if (he1 == NULL)
1686 {
1687 dlog(1, FIL__, __LINE__,
1688 _("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"),
1689 hostname);
1690 sl_strlcpy (sh.host.name, _("localhost"), SH_PATHBUF);
1691 SL_RET0(_("sh_unix_localhost"));
1692 }
1693
1694 /* check whether it looks like a FQDN
1695 */
1696 len = sl_strlen(sh.host.name);
1697 ddot = 0;
1698 for (i = 0; i < len; ++i)
1699 if (sh.host.name[i] == '.') ++ddot;
1700 if (ddot == 0)
1701 {
1702 dlog(1, FIL__, __LINE__,
1703 _("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"),
1704 hostname, sh.host.name);
1705 sl_strlcpy (sh.host.name,
1706 inet_ntoa (*(struct in_addr *) he1->h_addr),
1707 SH_PATHBUF);
1708 SL_RET0(_("sh_unix_localhost"));
1709 }
1710
1711 if (is_numeric(sh.host.name))
1712 {
1713 dlog(1, FIL__, __LINE__,
1714 _("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"),
1715 hostname, sh.host.name);
1716 }
1717
1718 SL_RET0(_("sh_unix_localhost"));
1719}
1720#endif
1721
1722
1723void sh_unix_memlock()
1724{
1725 SL_ENTER(_("sh_unix_memlock"));
1726
1727 /* do this before dropping privileges
1728 */
1729#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
1730 if (skey->mlock_failed == SL_FALSE)
1731 {
1732 if ( (-1) == sh_unix_mlock( FIL__, __LINE__,
1733 (char *) skey, sizeof (sh_key_t)) )
1734 {
1735 SH_MUTEX_LOCK_UNSAFE(mutex_skey);
1736 skey->mlock_failed = SL_TRUE;
1737 SH_MUTEX_UNLOCK_UNSAFE(mutex_skey);
1738 }
1739 }
1740#else
1741 if (skey->mlock_failed == SL_FALSE)
1742 {
1743 SH_MUTEX_LOCK_UNSAFE(mutex_skey);
1744 skey->mlock_failed = SL_TRUE;
1745 SH_MUTEX_UNLOCK_UNSAFE(mutex_skey);
1746 }
1747#endif
1748
1749 SL_RET0(_("sh_unix_memlock"));
1750}
1751
1752#ifdef SH_WITH_SERVER
1753char * chroot_dir = NULL;
1754
1755int sh_unix_set_chroot(const char * str)
1756{
1757 size_t len;
1758 static int block = 0;
1759
1760 if (block == 1)
1761 return 0;
1762
1763 if (str && *str == '/')
1764 {
1765 len = strlen(str) + 1;
1766 chroot_dir = malloc(strlen(str) + 1); /* only once */
1767 if (!chroot_dir)
1768 {
1769 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1770 return 1;
1771 }
1772 sl_strlcpy(chroot_dir, str, len);
1773 block = 1;
1774 return 0;
1775 }
1776 return 1;
1777}
1778
1779int sh_unix_chroot(void)
1780{
1781 int status;
1782
1783 if (chroot_dir != NULL)
1784 {
1785 status = retry_aud_chdir(FIL__, __LINE__, chroot_dir);
1786 if ( (-1) == status )
1787 {
1788 char errbuf[SH_ERRBUF_SIZE];
1789 status = errno;
1790 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
1791 sh_error_message (status, errbuf, sizeof(errbuf)), chroot_dir);
1792 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1793 }
1794 /* flawfinder: ignore */
1795 return (chroot(chroot_dir));
1796 }
1797 return 0;
1798}
1799/* #ifdef SH_WITH_SERVER */
1800#else
1801int sh_unix_chroot(void) { return 0; }
1802#endif
1803
1804/* daemon mode
1805 */
1806static int block_setdeamon = 0;
1807
1808int sh_unix_setdeamon(const char * dummy)
1809{
1810 int res = 0;
1811
1812 SL_ENTER(_("sh_unix_setdeamon"));
1813
1814 if (block_setdeamon != 0)
1815 SL_RETURN((0),_("sh_unix_setdeamon"));
1816
1817 if (dummy == NULL)
1818 sh.flag.isdaemon = ON;
1819 else
1820 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
1821
1822 if (sh.flag.opts == S_TRUE)
1823 block_setdeamon = 1;
1824
1825 SL_RETURN(res, _("sh_unix_setdeamon"));
1826}
1827#if defined(HAVE_LIBPRELUDE)
1828#include "sh_prelude.h"
1829#endif
1830
1831int sh_unix_setnodeamon(const char * dummy)
1832{
1833 int res = 0;
1834
1835 SL_ENTER(_("sh_unix_setnodeamon"));
1836
1837 if (block_setdeamon != 0)
1838 SL_RETURN((0),_("sh_unix_setmodeamon"));
1839
1840 if (dummy == NULL)
1841 sh.flag.isdaemon = OFF;
1842 else
1843 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
1844
1845 if (sh.flag.opts == S_TRUE)
1846 block_setdeamon = 1;
1847
1848 SL_RETURN(res, _("sh_unix_setnodeamon"));
1849}
1850
1851int sh_unix_init(int goDaemon)
1852{
1853 int status;
1854 uid_t uid;
1855 pid_t oldpid = getpid();
1856#if defined(SH_WITH_SERVER)
1857 extern int sh_socket_open_int (void);
1858#endif
1859 char errbuf[SH_ERRBUF_SIZE];
1860
1861 SL_ENTER(_("sh_unix_init"));
1862
1863 /* fork twice, exit the parent process
1864 */
1865 if (goDaemon == 1) {
1866
1867 switch (aud_fork(FIL__, __LINE__)) {
1868 case 0: break; /* child process continues */
1869 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
1870 default: aud__exit(FIL__, __LINE__, 0); /* parent process exits */
1871 }
1872
1873 /* Child processes do not inherit page locks across a fork.
1874 * Error in next fork would return in this (?) thread of execution.
1875 */
1876 sh_unix_memlock();
1877
1878 setsid(); /* should not fail */
1879 sh.pid = (UINT64) getpid();
1880
1881 switch (aud_fork(FIL__, __LINE__)) {
1882 case 0: break; /* child process continues */
1883 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
1884 default: aud__exit(FIL__, __LINE__, 0); /* parent process exits */
1885 }
1886
1887 /* Child processes do not inherit page locks across a fork.
1888 */
1889 sh_unix_memlock();
1890 sh.pid = (UINT64) getpid();
1891
1892 } else {
1893 setsid(); /* should not fail */
1894 }
1895
1896 /* set working directory
1897 */
1898#ifdef SH_PROFILE
1899 status = 0;
1900#else
1901 status = retry_aud_chdir(FIL__, __LINE__, "/");
1902#endif
1903 if ( (-1) == status )
1904 {
1905 status = errno;
1906 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
1907 sh_error_message (status, errbuf, sizeof(errbuf)), "/");
1908 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1909 }
1910
1911 /* reset timers
1912 */
1913 sh_unix_resettimer();
1914
1915 /* signal handlers
1916 */
1917 sh_unix_resetsignals();
1918#if defined(SCREW_IT_UP)
1919 sh_sigtrap_prepare();
1920#endif
1921 sh_unix_siginstall (goDaemon);
1922
1923 /* set file creation mask
1924 */
1925 (void) umask (0); /* should not fail */
1926
1927 /* set resource limits to maximum, and
1928 * core dump size to zero
1929 */
1930 sh_unix_setlimits();
1931
1932 /* zero out the environment (like PATH='\0')
1933 */
1934 sh_unix_zeroenv();
1935
1936 if (goDaemon == 1)
1937 {
1938 /* Close first tree file descriptors
1939 */
1940 close (0); /* if running as daemon */
1941 close (1); /* if running as daemon */
1942 close (2); /* if running as daemon */
1943
1944 /* Enable full error logging
1945 */
1946 sh_error_only_stderr (S_FALSE);
1947
1948 /* open first three streams to /dev/null
1949 */
1950 status = aud_open(FIL__, __LINE__, SL_NOPRIV, _("/dev/null"), O_RDWR, 0);
1951 if (status < 0)
1952 {
1953 status = errno;
1954 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
1955 sh_error_message(status, errbuf, sizeof(errbuf)), _("open"));
1956 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1957 }
1958
1959 status = retry_aud_dup(FIL__, __LINE__, 0);
1960 if (status >= 0)
1961 retry_aud_dup(FIL__, __LINE__, 0);
1962
1963 if (status < 0)
1964 {
1965 status = errno;
1966 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
1967 sh_error_message(status, errbuf, sizeof(errbuf)), _("dup"));
1968 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1969 }
1970
1971 sh_error_enable_unsafe (S_TRUE);
1972#if defined(HAVE_LIBPRELUDE)
1973 sh_prelude_reset ();
1974#endif
1975
1976 /* --- wait until parent has exited ---
1977 */
1978 while (1 == 1)
1979 {
1980 errno = 0;
1981 if (0 > aud_kill (FIL__, __LINE__, oldpid, 0) && errno == ESRCH)
1982 {
1983 break;
1984 }
1985 retry_msleep(0, 1);
1986 }
1987
1988 /* write PID file
1989 */
1990 status = sh_unix_write_pid_file();
1991 if (status < 0)
1992 {
1993 sl_get_euid(&uid);
1994 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_PIDFILE,
1995 (long) uid, sh.srvlog.alt);
1996 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1997 }
1998#if defined(SH_WITH_SERVER)
1999 sh_socket_open_int ();
2000#endif
2001 }
2002 else
2003 {
2004 sh_error_enable_unsafe (S_TRUE);
2005#if defined(HAVE_LIBPRELUDE)
2006 sh_prelude_reset ();
2007#endif
2008#if defined(SH_WITH_SERVER)
2009 sh_socket_open_int ();
2010#endif
2011 }
2012
2013 /* chroot (this is a no-op if no chroot dir is specified
2014 */
2015 status = sh_unix_chroot();
2016 if (status < 0)
2017 {
2018 status = errno;
2019 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2020 sh_error_message(status, errbuf, sizeof(errbuf)), _("chroot"));
2021 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2022 }
2023
2024 /* drop capabilities
2025 */
2026 sl_drop_cap();
2027
2028 SL_RETURN((0),_("sh_unix_init"));
2029}
2030
2031/* --- run a command, securely --- */
2032
2033int sh_unix_run_command (const char * str)
2034{
2035 pid_t pid;
2036 char * arg[4];
2037 char * env[5];
2038 char * path = sh_util_strdup(_("/bin/sh"));
2039
2040 int status = -1;
2041
2042 arg[0] = sh_util_strdup(_("/bin/sh"));
2043 arg[1] = sh_util_strdup(_("-c"));
2044 arg[2] = sh_util_strdup(str);
2045 arg[3] = NULL;
2046
2047 env[0] = sh_util_strdup(_("PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/ucb"));
2048 env[1] = sh_util_strdup(_("SHELL=/bin/sh"));
2049 env[2] = sh_util_strdup(_("IFS= \t\n"));
2050 if (getenv("TZ")) {
2051 char * tz = sh_util_strdup(getenv("TZ"));
2052 if (SL_TRUE == sl_ok_adds (4, strlen(tz))) {
2053 env[3] = SH_ALLOC(4+strlen(tz));
2054 sl_strlcpy(env[3], "TZ=", 4);
2055 sl_strlcat(env[3], tz , 4+strlen(tz));
2056 } else {
2057 env[3] = NULL;
2058 }
2059 } else {
2060 env[3] = NULL;
2061 }
2062 env[4] = NULL;
2063
2064 pid = fork();
2065
2066 if (pid == (pid_t)(-1))
2067 {
2068 return -1;
2069 }
2070
2071 else if (pid == 0) /* child */
2072 {
2073 memset(skey, 0, sizeof(sh_key_t));
2074 (void) umask(S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
2075 sh_unix_closeall (3, -1, SL_TRUE); /* in child process */
2076 execve(path, arg, env);
2077 _exit(EXIT_FAILURE);
2078 }
2079
2080 else /* parent */
2081 {
2082 int r;
2083
2084 while((r = waitpid(pid, &status, WCONTINUED|WUNTRACED)) != pid && r != -1) ;
2085
2086 if (r == -1 || !WIFEXITED(status))
2087 {
2088 status = -1;
2089 }
2090 else
2091 {
2092 status = WEXITSTATUS(status);
2093 }
2094 }
2095
2096 return status;
2097}
2098
2099/********************************************************
2100 *
2101 * TIME
2102 *
2103 ********************************************************/
2104
2105/* Figure out the time offset of the current timezone
2106 * in a portable way.
2107 */
2108char * t_zone(const time_t * xx)
2109{
2110 struct tm aa;
2111 struct tm bb;
2112 struct tm * cc;
2113 int sign = 0;
2114 int diff = 0;
2115 int hh, mm;
2116 static char tz[64];
2117
2118 SL_ENTER(_("t_zone"));
2119
2120#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2121 cc = gmtime_r (xx, &aa);
2122#else
2123 cc = gmtime (xx);
2124 memcpy (&aa, cc, sizeof(struct tm));
2125#endif
2126
2127#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2128 cc = localtime_r (xx, &bb);
2129#else
2130 cc = localtime (xx);
2131 memcpy (&bb, cc, sizeof(struct tm));
2132#endif
2133
2134 /* Check for datum wrap-around.
2135 */
2136 if (aa.tm_year < bb.tm_year)
2137 sign = (-1);
2138 else if (aa.tm_mon < bb.tm_mon)
2139 sign = (-1);
2140 else if (aa.tm_mday < bb.tm_mday)
2141 sign = (-1);
2142 else if (bb.tm_year < aa.tm_year)
2143 sign = ( 1);
2144 else if (bb.tm_mon < aa.tm_mon)
2145 sign = ( 1);
2146 else if (bb.tm_mday < aa.tm_mday)
2147 sign = ( 1);
2148
2149 diff = aa.tm_hour * 60 + aa.tm_min;
2150 diff = (bb.tm_hour * 60 + bb.tm_min) - diff;
2151 diff = diff - (sign * 24 * 60); /* datum wrap-around correction */
2152 hh = diff / 60;
2153 mm = diff - (hh * 60);
2154 sprintf (tz, _("%+03d%02d"), hh, mm); /* known to fit */
2155
2156 SL_RETURN(tz, _("t_zone"));
2157}
2158
2159unsigned long sh_unix_longtime ()
2160{
2161 return ((unsigned long)time(NULL));
2162}
2163
2164#ifdef HAVE_GETTIMEOFDAY
2165unsigned long sh_unix_notime ()
2166{
2167 struct timeval tv;
2168
2169 gettimeofday (&tv, NULL);
2170
2171 return ((unsigned long)(tv.tv_sec + tv.tv_usec * 10835 + getpid() + getppid()));
2172
2173}
2174#endif
2175
2176static int count_dev_time = 0;
2177
2178void reset_count_dev_time(void)
2179{
2180 count_dev_time = 0;
2181 return;
2182}
2183
2184int sh_unix_settimeserver (const char * address)
2185{
2186
2187 SL_ENTER(_("sh_unix_settimeserver"));
2188
2189 if (address != NULL && count_dev_time < 2
2190 && sl_strlen(address) < SH_PATHBUF)
2191 {
2192 if (count_dev_time == 0)
2193 sl_strlcpy (sh.srvtime.name, address, SH_PATHBUF);
2194 else
2195 sl_strlcpy (sh.srvtime.alt, address, SH_PATHBUF);
2196
2197 ++count_dev_time;
2198 SL_RETURN((0), _("sh_unix_settimeserver"));
2199 }
2200 SL_RETURN((-1), _("sh_unix_settimeserver"));
2201}
2202
2203
2204#ifdef HAVE_NTIME
2205#define UNIXEPOCH 2208988800UL /* difference between Unix time and net time
2206 * The UNIX EPOCH starts in 1970.
2207 */
2208#include <sys/socket.h>
2209#include <netinet/in.h>
2210#include <arpa/inet.h>
2211#include <netdb.h>
2212#include <ctype.h>
2213#endif
2214
2215/* Timeserver service. */
2216/* define is missing on HP-UX 10.20 */
2217#ifndef IPPORT_TIMESERVER
2218#define IPPORT_TIMESERVER 37
2219#endif
2220
2221char * sh_unix_time (time_t thetime, char * buffer, size_t len)
2222{
2223
2224 int status;
2225 char AsciiTime[81]; /* local time */
2226 time_t time_now;
2227 struct tm * time_ptr;
2228#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2229 struct tm time_tm;
2230#endif
2231#ifdef SH_USE_XML
2232 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2233#else
2234 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2235#endif
2236
2237#ifdef HAVE_NTIME
2238 int fd; /* network file descriptor */
2239 u_char net_time[4]; /* remote time in network format */
2240 static int failerr = 0; /* no net time */
2241 int fail = 0; /* no net time */
2242 int errflag;
2243 char errmsg[256];
2244 char error_call[SH_MINIBUF];
2245 int error_num;
2246#endif
2247
2248 SL_ENTER(_("sh_unix_time"));
2249
2250#ifdef HAVE_NTIME
2251 if (thetime == 0)
2252 {
2253 if (sh.srvtime.name[0] == '\0')
2254 {
2255 fail = 1;
2256 (void) time (&time_now);
2257 }
2258 else /* have a timeserver address */
2259 {
2260 fd = connect_port_2 (sh.srvtime.name, sh.srvtime.alt,
2261 IPPORT_TIMESERVER,
2262 error_call, &error_num, errmsg, sizeof(errmsg));
2263 if (fd >= 0)
2264 {
2265 if (4 != read_port (fd, (char *) net_time, 4, &errflag, 2))
2266 {
2267 fail = 1;
2268 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2269 MSG_E_NLOST,
2270 _("time"), sh.srvtime.name);
2271 }
2272 close(fd);
2273 }
2274 else
2275 {
2276 sh_error_handle ((-1), FIL__, __LINE__, error_num,
2277 MSG_E_NET, errmsg, error_call,
2278 _("time"), sh.srvtime.name);
2279 fail = 1;
2280 }
2281
2282 if (fail == 0)
2283 {
2284 time_now = ntohl(* (long *) net_time) - UNIXEPOCH;
2285 /* fprintf(stderr, "TIME IS %ld\n", time_now); */
2286 if (failerr == 1) {
2287 failerr = 0;
2288 sh_error_handle ((-1), FIL__, __LINE__, 0,
2289 MSG_E_NEST,
2290 _("time"), sh.srvtime.name);
2291 }
2292 }
2293 else
2294 {
2295 (void) time (&time_now);
2296 if (failerr == 0)
2297 {
2298 failerr = 1;
2299 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2300 MSG_SRV_FAIL,
2301 _("time"), sh.srvtime.name);
2302 }
2303 }
2304 }
2305 }
2306 else
2307 {
2308 time_now = thetime;
2309 }
2310
2311 /* #ifdef HAVE_NTIME */
2312#else
2313
2314 if (thetime == 0)
2315 {
2316 (void) time (&time_now);
2317 }
2318 else
2319 {
2320 time_now = thetime;
2321 }
2322
2323 /* #ifdef HAVE_NTIME */
2324#endif
2325
2326 if (time_now == (-1) )
2327 {
2328 sl_strlcpy(buffer, _(deftime), len);
2329 SL_RETURN(buffer, _("sh_unix_time"));
2330 }
2331 else
2332 {
2333#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2334 time_ptr = localtime_r (&time_now, &time_tm);
2335#else
2336 time_ptr = localtime (&time_now);
2337#endif
2338 }
2339 if (time_ptr != NULL)
2340 {
2341 status = strftime (AsciiTime, sizeof(AsciiTime),
2342#ifdef SH_USE_XML
2343 _("%Y-%m-%dT%H:%M:%S%%s"),
2344#else
2345 _("[%Y-%m-%dT%H:%M:%S%%s]"),
2346#endif
2347 time_ptr);
2348
2349 sl_snprintf(buffer, len, AsciiTime, t_zone(&time_now));
2350
2351 if ( (status == 0) || (status == sizeof(AsciiTime)) )
2352 {
2353 sl_strlcpy(buffer, _(deftime), len);
2354 SL_RETURN( buffer, _("sh_unix_time"));
2355 }
2356 else
2357 {
2358 SL_RETURN(buffer, _("sh_unix_time"));
2359 }
2360 }
2361
2362 /* last resort
2363 */
2364 sl_strlcpy(buffer, _(deftime), len);
2365 SL_RETURN( buffer, _("sh_unix_time"));
2366}
2367
2368static int sh_unix_use_localtime = S_FALSE;
2369
2370/* whether to use localtime for file timesatams in logs
2371 */
2372int sh_unix_uselocaltime (const char * c)
2373{
2374 int i;
2375 SL_ENTER(_("sh_unix_uselocaltime"));
2376 i = sh_util_flagval(c, &(sh_unix_use_localtime));
2377
2378 SL_RETURN(i, _("sh_unix_uselocaltime"));
2379}
2380
2381char * sh_unix_gmttime (time_t thetime, char * buffer, size_t len)
2382{
2383
2384 int status;
2385
2386 struct tm * time_ptr;
2387#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS)
2388 struct tm time_tm;
2389#endif
2390 char AsciiTime[81]; /* GMT time */
2391#ifdef SH_USE_XML
2392 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2393#else
2394 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2395#endif
2396
2397 SL_ENTER(_("sh_unix_gmttime"));
2398
2399 if (sh_unix_use_localtime == S_FALSE)
2400 {
2401#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2402 time_ptr = gmtime_r (&thetime, &time_tm);
2403#else
2404 time_ptr = gmtime (&thetime);
2405#endif
2406 }
2407 else
2408 {
2409#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2410 time_ptr = localtime_r (&thetime, &time_tm);
2411#else
2412 time_ptr = localtime (&thetime);
2413#endif
2414 }
2415 if (time_ptr != NULL)
2416 {
2417 status = strftime (AsciiTime, 80,
2418#ifdef SH_USE_XML
2419 _("%Y-%m-%dT%H:%M:%S"),
2420#else
2421 _("[%Y-%m-%dT%H:%M:%S]"),
2422#endif
2423 time_ptr);
2424
2425 if ( (status == 0) || (status == 80) )
2426 sl_strlcpy(buffer, _(deftime), len);
2427 else
2428 sl_strlcpy(buffer, AsciiTime, len);
2429 SL_RETURN( buffer, _("sh_unix_gmttime"));
2430 }
2431
2432 /* last resort
2433 */
2434 sl_strlcpy(buffer, _(deftime), len);
2435 SL_RETURN( buffer, _("sh_unix_gmttime"));
2436}
2437
2438
2439char * sh_unix_getUIDdir (int level, uid_t uid, char * out, size_t len)
2440{
2441 struct passwd * tempres;
2442 int status = 0;
2443#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2444 struct passwd pwd;
2445 char buffer[SH_PWBUF_SIZE];
2446#endif
2447 char errbuf[SH_ERRBUF_SIZE];
2448
2449 SL_ENTER(_("sh_unix_getUIDdir"));
2450
2451#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2452 sh_getpwuid_r(uid, &pwd, buffer, sizeof(buffer), &tempres);
2453#else
2454 errno = 0;
2455 tempres = sh_getpwuid(uid);
2456 status = errno;
2457#endif
2458
2459 if (tempres == NULL) {
2460 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2461 sh_error_message(status, errbuf, sizeof(errbuf)),
2462 _("getpwuid"), (long) uid, _("completely missing"));
2463 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2464 }
2465
2466 if (tempres->pw_dir != NULL) {
2467 sl_strlcpy(out, tempres->pw_dir, len);
2468 SL_RETURN( out, _("sh_unix_getUIDdir"));
2469 } else {
2470 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2471 sh_error_message(status, errbuf, sizeof(errbuf)),
2472 _("getpwuid"), (long) uid, _("pw_dir"));
2473 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2474 }
2475}
2476
2477SH_MUTEX_STATIC(mutex_getUIDname, PTHREAD_MUTEX_INITIALIZER);
2478
2479char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len)
2480{
2481 struct passwd * tempres;
2482#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2483 struct passwd pwd;
2484 char buffer[SH_PWBUF_SIZE];
2485#endif
2486 int status = 0;
2487 static uid_t old_uid;
2488 static char name[32] = { '\0' };
2489 char errbuf[SH_ERRBUF_SIZE];
2490
2491 SL_ENTER(_("sh_unix_getUIDname"));
2492
2493 if ((uid == old_uid) && (name[0] != '\0')) {
2494 out[0] = '\0';
2495 SH_MUTEX_LOCK_UNSAFE(mutex_getUIDname);
2496 if ((uid == old_uid) && (name[0] != '\0')) {
2497 sl_strlcpy(out, name, len);
2498 }
2499 SH_MUTEX_UNLOCK_UNSAFE(mutex_getUIDname);
2500 if (out[0] != '\0')
2501 SL_RETURN( out, _("sh_unix_getUIDname"));
2502 }
2503
2504#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2505 sh_getpwuid_r(uid, &pwd, buffer, sizeof(buffer), &tempres);
2506#else
2507 errno = 0;
2508 tempres = sh_getpwuid(uid);
2509 status = errno;
2510#endif
2511
2512 if (tempres == NULL) {
2513 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2514 sh_error_message(status, errbuf, sizeof(errbuf)),
2515 _("getpwuid"), (long) uid, _("completely missing"));
2516 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2517 }
2518
2519
2520 if (tempres->pw_name != NULL) {
2521 SH_MUTEX_LOCK_UNSAFE(mutex_getUIDname);
2522 sl_strlcpy(name, tempres->pw_name, sizeof(name));
2523 old_uid = uid;
2524 sl_strlcpy(out, name, len);
2525 SH_MUTEX_UNLOCK_UNSAFE(mutex_getUIDname);
2526 SL_RETURN( out, _("sh_unix_getUIDname"));
2527 } else {
2528 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2529 sh_error_message(status, errbuf, sizeof(errbuf)),
2530 _("getpwuid"), (long) uid, _("pw_user"));
2531 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2532 }
2533}
2534
2535SH_MUTEX_STATIC(mutex_getGIDname, PTHREAD_MUTEX_INITIALIZER);
2536
2537char * sh_unix_getGIDname (int level, gid_t gid, char * out, size_t len)
2538{
2539 struct group * tempres;
2540 int status = 0;
2541 static gid_t old_gid;
2542 static char name[32] = { '\0' };
2543#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2544 struct group grp;
2545 char buffer[SH_GRBUF_SIZE];
2546#endif
2547 char errbuf[SH_ERRBUF_SIZE];
2548
2549
2550 SL_ENTER(_("sh_unix_getGIDname"));
2551
2552 if ((gid == old_gid) && (name[0] != '\0')) {
2553 out[0] = '\0';
2554 SH_MUTEX_LOCK_UNSAFE(mutex_getGIDname);
2555 if ((gid == old_gid) && (name[0] != '\0')) {
2556 sl_strlcpy(out, name, len);
2557 }
2558 SH_MUTEX_UNLOCK_UNSAFE(mutex_getGIDname);
2559 if (out[0] != '\0')
2560 SL_RETURN( out, _("sh_unix_getGIDname"));
2561 }
2562
2563#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2564 status = sh_getgrgid_r(gid, &grp, buffer, sizeof(buffer), &tempres);
2565#else
2566 errno = 0;
2567 tempres = sh_getgrgid(gid);
2568 status = errno;
2569#endif
2570
2571 if (tempres == NULL) {
2572 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2573 sh_error_message(status, errbuf, sizeof(errbuf)),
2574 _("getgrgid"), (long) gid, _("completely missing"));
2575
2576 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2577 }
2578
2579 if (tempres->gr_name != NULL) {
2580 SH_MUTEX_LOCK_UNSAFE(mutex_getGIDname);
2581 sl_strlcpy(name, tempres->gr_name, sizeof(name));
2582 old_gid = gid;
2583 sl_strlcpy(out, name, len);
2584 SH_MUTEX_UNLOCK_UNSAFE(mutex_getGIDname);
2585 SL_RETURN( out, _("sh_unix_getGIDname"));
2586 } else {
2587 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2588 sh_error_message(status, errbuf, sizeof(errbuf)),
2589 _("getgrgid"), (long) gid, _("gr_name"));
2590 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2591 }
2592}
2593
2594int sh_unix_getUser ()
2595{
2596 char * p;
2597 uid_t seuid, sruid;
2598 char user[USER_MAX];
2599 char dir[SH_PATHBUF];
2600
2601 SL_ENTER(_("sh_unix_getUser"));
2602
2603 seuid = geteuid();
2604
2605 sh.effective.uid = seuid;
2606
2607 p = sh_unix_getUIDdir (SH_ERR_ERR, seuid, dir, sizeof(dir));
2608
2609 if (p == NULL)
2610 SL_RETURN((-1), _("sh_unix_getUser"));
2611 else
2612 {
2613 if (sl_strlen(p) >= SH_PATHBUF) {
2614 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2615 _("getpwuid"), (long) seuid, _("pw_home"));
2616 SL_RETURN((-1), _("sh_unix_getUser"));
2617 } else {
2618 sl_strlcpy ( sh.effective.home, p, SH_PATHBUF);
2619 }
2620 }
2621
2622 sruid = getuid();
2623
2624 sh.real.uid = sruid;
2625
2626 p = sh_unix_getUIDname (SH_ERR_ERR, sruid, user, sizeof(user));
2627 if (p == NULL)
2628 SL_RETURN((-1), _("sh_unix_getUser"));
2629 else
2630 {
2631 if (sl_strlen(p) >= USER_MAX) {
2632 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2633 _("getpwuid"), (long) sruid, _("pw_user"));
2634 SL_RETURN((-1), _("sh_unix_getUser"));
2635 } else {
2636 sl_strlcpy ( sh.real.user, p, USER_MAX);
2637 }
2638 }
2639
2640 p = sh_unix_getUIDdir (SH_ERR_ERR, sruid, dir, sizeof(dir));
2641
2642 if (p == NULL)
2643 SL_RETURN((-1), _("sh_unix_getUser"));
2644 else
2645 {
2646 if (sl_strlen(p) >= SH_PATHBUF) {
2647 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2648 _("getpwuid"), (long) sruid, _("pw_home"));
2649 SL_RETURN((-1), _("sh_unix_getUser"));
2650 } else {
2651 sl_strlcpy ( sh.real.home, p, SH_PATHBUF);
2652 }
2653 }
2654
2655 SL_RETURN((0), _("sh_unix_getUser"));
2656
2657 /* notreached */
2658}
2659
2660
2661int sh_unix_getline (SL_TICKET fd, char * line, int sizeofline)
2662{
2663 register int count;
2664 register int n = 0;
2665 char c;
2666
2667 SL_ENTER(_("sh_unix_getline"));
2668
2669 if (sizeofline < 2) {
2670 line[0] = '\0';
2671 SL_RETURN((0), _("sh_unix_getline"));
2672 }
2673
2674 --sizeofline;
2675
2676 while (n < sizeofline) {
2677
2678 count = sl_read (fd, &c, 1);
2679
2680 /* end of file
2681 */
2682 if (count < 1) {
2683 line[n] = '\0';
2684 n = -1;
2685 break;
2686 }
2687
2688 if (/* c != '\0' && */ c != '\n') {
2689 line[n] = c;
2690 ++n;
2691 } else if (c == '\n') {
2692 if (n > 0) {
2693 line[n] = '\0';
2694 break;
2695 } else {
2696 line[n] = '\n'; /* get newline only if only char on line */
2697 ++n;
2698 line[n] = '\0';
2699 break;
2700 }
2701 } else {
2702 line[n] = '\0';
2703 break;
2704 }
2705
2706 }
2707
2708
2709 line[sizeofline] = '\0'; /* make sure line is terminated */
2710 SL_RETURN((n), _("sh_unix_getline"));
2711}
2712
2713
2714#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
2715
2716/**************************************************************
2717 *
2718 * --- FILE INFO ---
2719 *
2720 **************************************************************/
2721
2722#if (defined(__linux__) && (defined(HAVE_LINUX_EXT2_FS_H) || defined(HAVE_EXT2FS_EXT2_FS_H))) || defined(HAVE_STAT_FLAGS)
2723
2724#if defined(__linux__)
2725
2726/* --- Determine ext2fs file attributes. ---
2727 */
2728#include <sys/ioctl.h>
2729#if defined(HAVE_EXT2FS_EXT2_FS_H)
2730#include <ext2fs/ext2_fs.h>
2731#else
2732#include <linux/ext2_fs.h>
2733#endif
2734
2735/* __linux__ includes */
2736#endif
2737
2738static
2739int sh_unix_getinfo_attr (char * name,
2740 unsigned long * flags,
2741 char * c_attr,
2742 int fd, struct stat * buf)
2743{
2744
2745/* TAKEN FROM:
2746 *
2747 * lsattr.c - List file attributes on an ext2 file system
2748 *
2749 * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
2750 * Laboratoire MASI, Institut Blaise Pascal
2751 * Universite Pierre et Marie Curie (Paris VI)
2752 *
2753 * This file can be redistributed under the terms of the GNU General
2754 * Public License
2755 */
2756
2757#ifdef HAVE_STAT_FLAGS
2758
2759 SL_ENTER(_("sh_unix_getinfo_attr"));
2760
2761 *flags = 0;
2762
2763 /* cast to void to avoid compiler warning about unused parameters */
2764 (void) fd;
2765 (void) name;
2766
2767#ifdef UF_NODUMP
2768 if (buf->st_flags & UF_NODUMP) {
2769 *flags |= UF_NODUMP;
2770 c_attr[0] = 'd';
2771 }
2772#endif
2773#ifdef UF_IMMUTABLE
2774 if (buf->st_flags & UF_IMMUTABLE) {
2775 *flags |= UF_IMMUTABLE;
2776 c_attr[1] = 'i';
2777 }
2778#endif
2779#ifdef UF_APPEND
2780 if (buf->st_flags & UF_APPEND) {
2781 *flags |= UF_APPEND;
2782 c_attr[2] = 'a';
2783 }
2784#endif
2785#ifdef UF_NOUNLINK
2786 if (buf->st_flags & UF_NOUNLINK) {
2787 *flags |= UF_NOUNLINK;
2788 c_attr[3] = 'u';
2789 }
2790#endif
2791#ifdef UF_OPAQUE
2792 if (buf->st_flags & UF_OPAQUE) {
2793 *flags |= UF_OPAQUE;
2794 c_attr[4] = 'o';
2795 }
2796#endif
2797#ifdef SF_ARCHIVED
2798 if (buf->st_flags & SF_ARCHIVED) {
2799 *flags |= SF_ARCHIVED;
2800 c_attr[5] = 'R';
2801 }
2802
2803#endif
2804#ifdef SF_IMMUTABLE
2805 if (buf->st_flags & SF_IMMUTABLE) {
2806 *flags |= SF_IMMUTABLE;
2807 c_attr[6] = 'I';
2808 }
2809#endif
2810#ifdef SF_APPEND
2811 if (buf->st_flags & SF_APPEND) {
2812 *flags |= SF_APPEND;
2813 c_attr[7] = 'A';
2814 }
2815#endif
2816#ifdef SF_NOUNLINK
2817 if (buf->st_flags & SF_NOUNLINK) {
2818 *flags |= SF_NOUNLINK;
2819 c_attr[8] = 'U';
2820 }
2821#endif
2822
2823 /* ! HAVE_STAT_FLAGS */
2824#else
2825
2826#ifdef HAVE_EXT2_IOCTLS
2827 int /* fd, */ r, f;
2828
2829 SL_ENTER(_("sh_unix_getinfo_attr"));
2830
2831 *flags = 0;
2832 (void) buf;
2833
2834 /* open() -> aud_open() R.Wichmann
2835 fd = aud_open (FIL__, __LINE__, SL_YESPRIV, name, O_RDONLY|O_NONBLOCK, 0);
2836 */
2837
2838 if (fd == -1 || name == NULL)
2839 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
2840
2841
2842 r = ioctl (fd, EXT2_IOC_GETFLAGS, &f);
2843 /* close (fd); */
2844
2845 if (r == -1)
2846 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
2847
2848 if (f == 0)
2849 SL_RETURN(0, _("sh_unix_getinfo_attr"));
2850
2851 *flags = f;
2852
2853/* ! HAVE_EXT2_IOCTLS */
2854#else
2855
2856 SL_ENTER(_("sh_unix_getinfo_attr"));
2857
2858 *flags = 0; /* modified by R.Wichmann */
2859
2860/* ! HAVE_EXT2_IOCTLS */
2861#endif
2862/*
2863 * END
2864 *
2865 * lsattr.c - List file attributes on an ext2 file system
2866 */
2867
2868 if (*flags == 0)
2869 goto theend;
2870
2871#ifdef EXT2_SECRM_FL
2872 if ( (*flags & EXT2_SECRM_FL) != 0 ) c_attr[0] = 's';
2873#endif
2874#ifdef EXT2_UNRM_FL
2875 if ( (*flags & EXT2_UNRM_FL) != 0 ) c_attr[1] = 'u';
2876#endif
2877#ifdef EXT2_SYNC_FL
2878 if ( (*flags & EXT2_SYNC_FL) != 0 ) c_attr[2] = 'S';
2879#endif
2880#ifdef EXT2_IMMUTABLE_FL
2881 if ( (*flags & EXT2_IMMUTABLE_FL) != 0) c_attr[3] = 'i';
2882#endif
2883#ifdef EXT2_APPEND_FL
2884 if ( (*flags & EXT2_APPEND_FL) != 0 ) c_attr[4] = 'a';
2885#endif
2886#ifdef EXT2_NODUMP_FL
2887 if ( (*flags & EXT2_NODUMP_FL) != 0 ) c_attr[5] = 'd';
2888#endif
2889#ifdef EXT2_NOATIME_FL
2890 if ( (*flags & EXT2_NOATIME_FL) != 0) c_attr[6] = 'A';
2891#endif
2892#ifdef EXT2_COMPR_FL
2893 if ( (*flags & EXT2_COMPR_FL) != 0 ) c_attr[7] = 'c';
2894#endif
2895
2896#ifdef EXT2_TOPDIR_FL
2897 if ( (*flags & EXT2_TOPDIR_FL) != 0 ) c_attr[8] = 'T';
2898#endif
2899#ifdef EXT2_DIRSYNC_FL
2900 if ( (*flags & EXT2_DIRSYNC_FL) != 0 ) c_attr[9] = 'D';
2901#endif
2902#ifdef EXT2_NOTAIL_FL
2903 if ( (*flags & EXT2_NOTAIL_FL) != 0 ) c_attr[10] = 't';
2904#endif
2905#ifdef EXT2_JOURNAL_DATA_FL
2906 if ( (*flags & EXT2_JOURNAL_DATA_FL) != 0) c_attr[11] = 'j';
2907#endif
2908
2909 theend:
2910 /* ext2 */
2911#endif
2912
2913 c_attr[12] = '\0';
2914
2915 SL_RETURN(0, _("sh_unix_getinfo_attr"));
2916}
2917#else
2918static
2919int sh_unix_getinfo_attr (char * name,
2920 unsigned long * flags,
2921 char * c_attr,
2922 int fd, struct stat * buf)
2923{
2924 return 0;
2925}
2926
2927/* defined(__linux__) || defined(HAVE_STAT_FLAGS) */
2928#endif
2929
2930/* determine file type
2931 */
2932static
2933int sh_unix_getinfo_type (struct stat * buf,
2934 ShFileType * type,
2935 char * c_mode)
2936{
2937 SL_ENTER(_("sh_unix_getinfo_type"));
2938
2939 if ( S_ISREG(buf->st_mode) ) {
2940 (*type) = SH_FILE_REGULAR;
2941 c_mode[0] = '-';
2942 }
2943 else if ( S_ISLNK(buf->st_mode) ) {
2944 (*type) = SH_FILE_SYMLINK;
2945 c_mode[0] = 'l';
2946 }
2947 else if ( S_ISDIR(buf->st_mode) ) {
2948 (*type) = SH_FILE_DIRECTORY;
2949 c_mode[0] = 'd';
2950 }
2951 else if ( S_ISCHR(buf->st_mode) ) {
2952 (*type) = SH_FILE_CDEV;
2953 c_mode[0] = 'c';
2954 }
2955 else if ( S_ISBLK(buf->st_mode) ) {
2956 (*type) = SH_FILE_BDEV;
2957 c_mode[0] = 'b';
2958 }
2959 else if ( S_ISFIFO(buf->st_mode) ) {
2960 (*type) = SH_FILE_FIFO;
2961 c_mode[0] = '|';
2962 }
2963 else if ( S_ISSOCK(buf->st_mode) ) {
2964 (*type) = SH_FILE_SOCKET;
2965 c_mode[0] = 's';
2966 }
2967 else if ( S_ISDOOR(buf->st_mode) ) {
2968 (*type) = SH_FILE_DOOR;
2969 c_mode[0] = 'D';
2970 }
2971 else if ( S_ISPORT(buf->st_mode) ) {
2972 (*type) = SH_FILE_PORT;
2973 c_mode[0] = 'P';
2974 }
2975 else {
2976 (*type) = SH_FILE_UNKNOWN;
2977 c_mode[0] = '?';
2978 }
2979
2980 SL_RETURN(0, _("sh_unix_getinfo_type"));
2981}
2982
2983int sh_unix_get_ftype(char * fullpath)
2984{
2985 char c_mode[CMODE_SIZE];
2986 struct stat buf;
2987 ShFileType type;
2988 int res;
2989
2990 SL_ENTER(_("sh_unix_get_ftype"));
2991
2992 res = retry_lstat(FIL__, __LINE__, fullpath, &buf);
2993
2994 if (res < 0)
2995 SL_RETURN(SH_FILE_UNKNOWN, _("sh_unix_getinfo_type"));
2996
2997 sh_unix_getinfo_type (&buf, &type, c_mode);
2998
2999 SL_RETURN(type, _("sh_unix_get_ftype"));
3000}
3001
3002
3003static
3004int sh_unix_getinfo_mode (struct stat *buf,
3005 unsigned int * mode,
3006 char * c_mode)
3007{
3008
3009 SL_ENTER(_("sh_unix_getinfo_mode"));
3010
3011 (*mode) = buf->st_mode;
3012
3013 /* make 'ls'-like string */
3014
3015 if ( (buf->st_mode & S_IRUSR) != 0 ) c_mode[1] = 'r';
3016 if ( (buf->st_mode & S_IWUSR) != 0 ) c_mode[2] = 'w';
3017 if ( (buf->st_mode & S_IXUSR) != 0 ) {
3018 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 's';
3019 else c_mode[3] = 'x';
3020 } else {
3021 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 'S';
3022 }
3023
3024 if ( (buf->st_mode & S_IRGRP) != 0 ) c_mode[4] = 'r';
3025 if ( (buf->st_mode & S_IWGRP) != 0 ) c_mode[5] = 'w';
3026 if ( (buf->st_mode & S_IXGRP) != 0 ) {
3027 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 's';
3028 else c_mode[6] = 'x';
3029 } else {
3030 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 'S';
3031 }
3032
3033 if ( (buf->st_mode & S_IROTH) != 0 ) c_mode[7] = 'r';
3034 if ( (buf->st_mode & S_IWOTH) != 0 ) c_mode[8] = 'w';
3035#ifdef S_ISVTX /* not POSIX */
3036 if ( (buf->st_mode & S_IXOTH) != 0 ) {
3037 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 't';
3038 else c_mode[9] = 'x';
3039 } else {
3040 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 'T';
3041 }
3042#else
3043 if ( (buf->st_mode & S_IXOTH) != 0 ) c_mode[9] = 'x';
3044#endif
3045
3046 SL_RETURN(0, _("sh_unix_getinfo_mode"));
3047}
3048
3049
3050long IO_Limit = 0;
3051
3052void sh_unix_io_pause ()
3053{
3054 long runtime;
3055 float someval;
3056 unsigned long sometime;
3057
3058 if (IO_Limit == 0)
3059 {
3060 return;
3061 }
3062 else
3063 {
3064 runtime = (long) (time(NULL) - sh.statistics.time_start);
3065
3066 if (runtime > 0 && (long)(sh.statistics.bytes_hashed/runtime) > IO_Limit)
3067 {
3068 someval = sh.statistics.bytes_hashed - (IO_Limit * runtime);
3069 someval /= (float) IO_Limit;
3070 if (someval < 1.0)
3071 {
3072 someval *= 1000; /* milliseconds in a second */
3073 sometime = (unsigned long) someval;
3074 retry_msleep(0, sometime);
3075 }
3076 else
3077 {
3078 sometime = (unsigned long) someval;
3079 retry_msleep (sometime, 0);
3080 }
3081 }
3082 }
3083 return;
3084}
3085
3086int sh_unix_set_io_limit (const char * c)
3087{
3088 long val;
3089
3090 SL_ENTER(_("sh_unix_set_io_limit"));
3091
3092 val = strtol (c, (char **)NULL, 10);
3093 if (val < 0)
3094 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
3095 _("set I/O limit"), c);
3096
3097 val = (val < 0 ? 0 : val);
3098
3099 IO_Limit = val * 1024;
3100 SL_RETURN( 0, _("sh_unix_set_io_limit"));
3101}
3102
3103/* obtain file info
3104 */
3105extern int flag_err_debug;
3106
3107#include "sh_ignore.h"
3108
3109int sh_unix_checksum_size (char * filename, struct stat * fbuf,
3110 char * fileHash, int alert_timeout, SL_TICKET fd)
3111{
3112 file_type tmpFile;
3113 int status;
3114
3115 SL_ENTER(_("sh_unix_checksum_size"));
3116
3117 tmpFile.link_path = NULL;
3118
3119 if (sh.flag.checkSum != SH_CHECK_INIT)
3120 {
3121 /* lookup file in database */
3122 status = sh_hash_get_it (filename, &tmpFile);
3123 if (status != 0) {
3124 goto out;
3125 }
3126 }
3127 else
3128 {
3129 tmpFile.size = fbuf->st_size;
3130 }
3131
3132 /* if last < current get checksum */
3133 if (tmpFile.size < fbuf->st_size)
3134 {
3135 char hashbuf[KEYBUF_SIZE];
3136 UINT64 local_length = (UINT64) (tmpFile.size < 0 ? 0 : tmpFile.size);
3137 sl_strlcpy(fileHash,
3138 sh_tiger_generic_hash (filename, fd, &(local_length),
3139 alert_timeout, hashbuf, sizeof(hashbuf)),
3140 KEY_LEN+1);
3141
3142 /* return */
3143 if (tmpFile.link_path) SH_FREE(tmpFile.link_path);
3144 SL_RETURN( 0, _("sh_unix_checksum_size"));
3145 }
3146
3147 out:
3148 if (tmpFile.link_path) SH_FREE(tmpFile.link_path);
3149 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3150 SL_RETURN( -1, _("sh_unix_checksum_size"));
3151}
3152
3153int sh_unix_check_selinux = S_FALSE;
3154int sh_unix_check_acl = S_FALSE;
3155
3156#ifdef USE_ACL
3157
3158#include <sys/acl.h>
3159static char * sh_unix_getinfo_acl (char * path, int fd, struct stat * buf)
3160{
3161 /* system.posix_acl_access, system.posix_acl_default
3162 */
3163 char * out = NULL;
3164 char * collect = NULL;
3165 char * tmp;
3166 char * out_compact;
3167 ssize_t len;
3168 acl_t result;
3169
3170 SL_ENTER(_("sh_unix_getinfo_acl"));
3171
3172 result = (fd == -1) ?
3173 acl_get_file (path, ACL_TYPE_ACCESS) :
3174 acl_get_fd (fd);
3175
3176 if (result)
3177 {
3178 out = acl_to_text (result, &len);
3179 if (out && (len > 0)) {
3180 out_compact = sh_util_acl_compact (out, len);
3181 acl_free(out);
3182 if (out_compact)
3183 {
3184 collect = sh_util_strconcat (_("acl_access:"), out_compact, NULL);
3185 SH_FREE(out_compact);
3186 }
3187 }
3188 acl_free(result);
3189 }
3190
3191
3192 if ( S_ISDIR(buf->st_mode) )
3193 {
3194 result = acl_get_file (path, ACL_TYPE_DEFAULT);
3195
3196 if (result)
3197 {
3198 out = acl_to_text (result, &len);
3199 if (out && (len > 0)) {
3200 out_compact = sh_util_acl_compact (out, len);
3201 acl_free(out);
3202 if (out_compact) {
3203 if (collect) {
3204 tmp = sh_util_strconcat (_("acl_default:"),
3205 out_compact, ":", collect, NULL);
3206 SH_FREE(collect);
3207 }
3208 else {
3209 tmp = sh_util_strconcat (_("acl_default:"), out_compact, NULL);
3210 }
3211 SH_FREE(out_compact);
3212 collect = tmp;
3213 }
3214 }
3215 acl_free(result);
3216 }
3217 }
3218
3219 SL_RETURN((collect),_("sh_unix_getinfo_acl"));
3220}
3221#endif
3222
3223#ifdef USE_XATTR
3224
3225#include <attr/xattr.h>
3226static char * sh_unix_getinfo_xattr_int (char * path, int fd, char * name)
3227{
3228 char * out = NULL;
3229 char * tmp = NULL;
3230 size_t size = 256;
3231 ssize_t result;
3232
3233 SL_ENTER(_("sh_unix_getinfo_xattr_int"));
3234
3235 out = SH_ALLOC(size);
3236
3237 result = (fd == -1) ?
3238 lgetxattr (path, name, out, size-1) :
3239 fgetxattr (fd, name, out, size-1);
3240
3241 if (result == -1 && errno == ERANGE)
3242 {
3243 SH_FREE(out);
3244 result = (fd == -1) ?
3245 lgetxattr (path, name, NULL, 0) :
3246 fgetxattr (fd, name, NULL, 0);
3247 size = result + 1;
3248 out = SH_ALLOC(size);
3249 result = (fd == -1) ?
3250 lgetxattr (path, name, out, size-1) :
3251 fgetxattr (fd, name, out, size-1);
3252 }
3253
3254 if ((result > 0) && ((size_t)result < size))
3255 {
3256 out[size-1] = '\0';
3257 tmp = out;
3258 }
3259 else
3260 {
3261 SH_FREE(out);
3262 }
3263
3264 SL_RETURN((tmp),_("sh_unix_getinfo_xattr_int"));
3265}
3266
3267
3268static char * sh_unix_getinfo_xattr (char * path, int fd, struct stat * buf)
3269{
3270 /* system.posix_acl_access, system.posix_acl_default, security.selinux
3271 */
3272 char * tmp;
3273 char * out = NULL;
3274 char * collect = NULL;
3275
3276 SL_ENTER(_("sh_unix_getinfo_xattr"));
3277
3278#ifdef USE_ACL
3279 /*
3280 * we need the acl_get_fd/acl_get_file functions, getxattr will only
3281 * yield the raw bytes
3282 */
3283 if (sh_unix_check_acl == S_TRUE)
3284 {
3285 out = sh_unix_getinfo_acl(path, fd, buf);
3286
3287 if (out)
3288 {
3289 collect = out;
3290 }
3291 }
3292#endif
3293
3294 if (sh_unix_check_selinux == S_TRUE)
3295 {
3296 out = sh_unix_getinfo_xattr_int(path, fd, _("security.selinux"));
3297
3298 if (out)
3299 {
3300 if (collect) {
3301 tmp = sh_util_strconcat(_("selinux:"), out, ":", collect, NULL);
3302 SH_FREE(collect);
3303 }
3304 else {
3305 tmp = sh_util_strconcat(_("selinux:"), out, NULL);
3306 }
3307 SH_FREE(out);
3308 collect = tmp;
3309 }
3310 }
3311
3312 SL_RETURN((collect),_("sh_unix_getinfo_xattr"));
3313}
3314#endif
3315
3316#ifdef USE_XATTR
3317int sh_unix_setcheckselinux (const char * c)
3318{
3319 int i;
3320 SL_ENTER(_("sh_unix_setcheckselinux"));
3321 i = sh_util_flagval(c, &(sh_unix_check_selinux));
3322
3323 SL_RETURN(i, _("sh_unix_setcheckselinux"));
3324}
3325#endif
3326
3327#ifdef USE_ACL
3328int sh_unix_setcheckacl (const char * c)
3329{
3330 int i;
3331 SL_ENTER(_("sh_unix_setcheckacl"));
3332 i = sh_util_flagval(c, &(sh_unix_check_acl));
3333
3334 SL_RETURN(i, _("sh_unix_setcheckacl"));
3335}
3336#endif
3337
3338#ifdef HAVE_LIBZ
3339#include <zlib.h>
3340#endif
3341
3342int sh_unix_getinfo (int level, char * filename, file_type * theFile,
3343 char * fileHash, int policy)
3344{
3345 char timestr[81];
3346 long runtim;
3347 struct stat buf;
3348 struct stat lbuf;
3349 struct stat fbuf;
3350 int stat_return;
3351 int stat_errno = 0;
3352
3353 ShFileType type;
3354 unsigned int mode;
3355 char * tmp;
3356 char * tmp2;
3357
3358 char * linknamebuf;
3359 int linksize;
3360
3361 extern int get_the_fd (SL_TICKET ticket);
3362
3363 SL_TICKET rval_open;
3364 int err_open = 0;
3365
3366 int fd;
3367 int fstat_return;
3368 int fstat_errno = 0;
3369
3370 sh_string * content = NULL;
3371
3372 time_t tend;
3373 time_t tstart;
3374
3375
3376 char * path = NULL;
3377
3378 int alert_timeout = 120;
3379
3380 path = theFile->fullpath;
3381
3382 SL_ENTER(_("sh_unix_getinfo"));
3383
3384 /* --- Stat the file, and get checksum. ---
3385 */
3386 tstart = time(NULL);
3387
3388 stat_return = retry_lstat (FIL__, __LINE__,
3389 path /* theFile->fullpath */, &buf);
3390
3391 if (stat_return)
3392 stat_errno = errno;
3393
3394 fd = -1;
3395 fstat_return = -1;
3396 rval_open = -1;
3397
3398 theFile->link_path = NULL;
3399
3400 if (stat_return == 0 && S_ISREG(buf.st_mode))
3401 {
3402 rval_open = sl_open_fastread (path /* theFile->fullpath */, SL_YESPRIV);
3403 if (SL_ISERROR(rval_open))
3404 err_open = errno;
3405
3406 alert_timeout = 120; /* this is per 8K block now ! */
3407
3408 if (path[1] == 'p' && path[5] == '/' && path[2] == 'r' &&
3409 path[3] == 'o' && path[4] == 'c' && path[0] == '/')
3410 {
3411 /* seven is magic */
3412 alert_timeout = 7;
3413 }
3414
3415 fd = get_the_fd(rval_open);
3416 }
3417
3418 tend = time(NULL);
3419
3420 /* An unprivileged user may slow lstat/open to a crawl
3421 * with clever path/symlink setup
3422 */
3423 if ((tend - tstart) > (time_t) /* 60 */ 6)
3424 {
3425 tmp2 = sh_util_safe_name (theFile->fullpath);
3426 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_TOOLATE,
3427 (long)(tend - tstart), tmp2);
3428 SH_FREE(tmp2);
3429 }
3430
3431 if (fd >= 0)
3432 {
3433 fstat_return = retry_fstat (FIL__, __LINE__, fd, &fbuf);
3434 if (fstat_return)
3435 fstat_errno = errno;
3436 }
3437 else
3438 {
3439 fd = -1;
3440 }
3441
3442
3443 /* --- case 1: lstat failed ---
3444 */
3445 if (stat_return != 0)
3446 {
3447 stat_return = errno;
3448 if (!SL_ISERROR(rval_open))
3449 sl_close(rval_open);
3450 if (sh.flag.checkSum == SH_CHECK_INIT ||
3451 (sh_hash_have_it (theFile->fullpath) >= 0 &&
3452 (!SH_FFLAG_REPORTED_SET(theFile->file_reported))))
3453 {
3454 if (S_FALSE == sh_ignore_chk_del(theFile->fullpath)) {
3455 char errbuf[SH_ERRBUF_SIZE];
3456 uid_t euid;
3457 (void) sl_get_euid(&euid);
3458 tmp2 = sh_util_safe_name (theFile->fullpath);
3459 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
3460 _("lstat"),
3461 sh_error_message (stat_errno, errbuf, sizeof(errbuf)),
3462 (long) euid,
3463 tmp2);
3464 SH_FREE(tmp2);
3465 }
3466 }
3467 SL_RETURN((-1),_("sh_unix_getinfo"));
3468 }
3469
3470 /* --- case 2: not a regular file ---
3471 */
3472 else if (! S_ISREG(buf.st_mode))
3473 {
3474 if (fileHash != NULL)
3475 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3476 }
3477
3478 /* --- case 3a: a regular file, fstat ok ---
3479 */
3480 else if (fstat_return == 0 &&
3481 buf.st_mode == fbuf.st_mode &&
3482 buf.st_ino == fbuf.st_ino &&
3483 buf.st_uid == fbuf.st_uid &&
3484 buf.st_gid == fbuf.st_gid &&
3485 buf.st_dev == fbuf.st_dev )
3486 {
3487 if (fileHash != NULL)
3488 {
3489 if ((theFile->check_mask & MODI_CHK) == 0)
3490 {
3491 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3492 }
3493 else if ((theFile->check_mask & MODI_PREL) != 0 &&
3494 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
3495 alert_timeout, theFile->fullpath))
3496 {
3497 if (0 != sh_prelink_run (theFile->fullpath,
3498 fileHash, alert_timeout))
3499 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3500 }
3501 else
3502 {
3503 char hashbuf[KEYBUF_SIZE];
3504 UINT64 length_nolim = TIGER_NOLIM;
3505
3506 if (MODI_TXT_ENABLED(theFile->check_mask) && fbuf.st_size < (10 * SH_TXT_MAX))
3507 {
3508 sl_init_content (rval_open, fbuf.st_size);
3509 }
3510
3511 sl_strlcpy(fileHash,
3512 sh_tiger_generic_hash (theFile->fullpath,
3513 rval_open, &length_nolim,
3514 alert_timeout,
3515 hashbuf, sizeof(hashbuf)),
3516 KEY_LEN+1);
3517
3518 content = sl_get_content(rval_open);
3519 content = sh_string_copy(content);
3520
3521 if ((theFile->check_mask & MODI_SGROW) != 0)
3522 {
3523 fbuf.st_size = (off_t) length_nolim;
3524 buf.st_size = fbuf.st_size;
3525 sl_rewind(rval_open);
3526 sh_unix_checksum_size (theFile->fullpath, &fbuf,
3527 &fileHash[KEY_LEN + 1],
3528 alert_timeout, rval_open);
3529 }
3530 }
3531 }
3532 }
3533
3534 /* --- case 3b: a regular file, fstat ok, but different ---
3535 */
3536 else if (fstat_return == 0 && S_ISREG(fbuf.st_mode))
3537 {
3538 memcpy (&buf, &fbuf, sizeof( struct stat ));
3539
3540 if (fileHash != NULL)
3541 {
3542 if ((theFile->check_mask & MODI_CHK) == 0)
3543 {
3544 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3545 }
3546 else if (policy == SH_LEVEL_PRELINK &&
3547 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
3548 alert_timeout, theFile->fullpath))
3549 {
3550 if (0 != sh_prelink_run (theFile->fullpath,
3551 fileHash, alert_timeout))
3552 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3553 }
3554 else
3555 {
3556 char hashbuf[KEYBUF_SIZE];
3557 UINT64 length_nolim = TIGER_NOLIM;
3558
3559 if (MODI_TXT_ENABLED(theFile->check_mask) && fbuf.st_size < (10 * SH_TXT_MAX))
3560 {
3561 sl_init_content (rval_open, fbuf.st_size);
3562 }
3563
3564 sl_strlcpy(fileHash,
3565 sh_tiger_generic_hash (theFile->fullpath, rval_open,
3566 &length_nolim,
3567 alert_timeout,
3568 hashbuf, sizeof(hashbuf)),
3569 KEY_LEN + 1);
3570
3571 content = sl_get_content(rval_open);
3572 content = sh_string_copy(content);
3573
3574 if ((theFile->check_mask & MODI_SGROW) != 0)
3575 {
3576 fbuf.st_size = (off_t) length_nolim;
3577 buf.st_size = fbuf.st_size;
3578 sl_rewind(rval_open);
3579 sh_unix_checksum_size (theFile->fullpath, &fbuf,
3580 &fileHash[KEY_LEN + 1],
3581 alert_timeout, rval_open);
3582 }
3583 }
3584 }
3585 }
3586
3587 /* --- case 4: a regular file, fstat failed ---
3588 */
3589
3590 else /* fstat_return != 0 or !S_ISREG(fbuf.st_mode) or open() failed */
3591 {
3592 uid_t euid;
3593
3594 if (fileHash != NULL)
3595 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3596
3597 if ((theFile->check_mask & MODI_CHK) != 0)
3598 {
3599 tmp2 = sh_util_safe_name (theFile->fullpath);
3600
3601 if (fstat_return != 0)
3602 {
3603 char errbuf[SH_ERRBUF_SIZE];
3604 (void) sl_get_euid(&euid);
3605
3606 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
3607 _("fstat"),
3608 sh_error_message (fstat_errno, errbuf, sizeof(errbuf)),
3609 (long) euid,
3610 tmp2);
3611 }
3612 else if (!S_ISREG(fbuf.st_mode))
3613 {
3614 sh_error_handle (level, FIL__, __LINE__, fstat_errno,
3615 MSG_E_NOTREG, tmp2);
3616 }
3617 else
3618 {
3619 char errbuf[SH_ERRBUF_SIZE];
3620 char errbuf2[SH_ERRBUF_SIZE];
3621 sl_strlcpy(errbuf, sl_error_string(rval_open), sizeof(errbuf));
3622 sh_error_message(err_open, errbuf2, sizeof(errbuf2));
3623 sh_error_handle (level, FIL__, __LINE__, err_open,
3624 MSG_E_READ, errbuf, errbuf2, tmp2);
3625 }
3626 SH_FREE(tmp2);
3627 }
3628 }
3629
3630
3631 /* --- Determine file type. ---
3632 */
3633 memset (theFile->c_mode, '-', CMODE_SIZE-1);
3634 theFile->c_mode[CMODE_SIZE-1] = '\0';
3635
3636 memset (theFile->link_c_mode, '-', CMODE_SIZE-1);
3637 theFile->link_c_mode[CMODE_SIZE-1] = '\0';
3638
3639 sh_unix_getinfo_type (&buf, &type, theFile->c_mode);
3640 theFile->type = type;
3641
3642#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
3643
3644 /* --- Determine file attributes. ---
3645 */
3646 memset (theFile->c_attributes, '-', ATTRBUF_SIZE);
3647 theFile->c_attributes[ATTRBUF_USED] = '\0';
3648 theFile->attributes = 0;
3649
3650 if (theFile->c_mode[0] != 'c' && theFile->c_mode[0] != 'b' &&
3651 theFile->c_mode[0] != 'l' )
3652 sh_unix_getinfo_attr(theFile->fullpath,
3653 &theFile->attributes, theFile->c_attributes,
3654 fd, &buf);
3655#endif
3656
3657#if defined(USE_XATTR) && defined(USE_ACL)
3658 if (sh_unix_check_selinux == S_TRUE || sh_unix_check_acl == S_TRUE)
3659 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
3660#elif defined(USE_XATTR)
3661 if (sh_unix_check_selinux == S_TRUE)
3662 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
3663#elif defined(USE_ACL)
3664 if (sh_unix_check_acl == S_TRUE)
3665 theFile->attr_string = sh_unix_getinfo_acl (theFile->fullpath, fd, &buf);
3666#else
3667 theFile->attr_string = NULL;
3668#endif
3669
3670 if (!SL_ISERROR(rval_open))
3671 sl_close(rval_open);
3672
3673
3674 /* --- I/O limit. ---
3675 */
3676 if (IO_Limit > 0)
3677 {
3678 runtim = (long) (time(NULL) - sh.statistics.time_start);
3679
3680 if (runtim > 0 && (long)(sh.statistics.bytes_hashed/runtim) > IO_Limit)
3681 retry_msleep(1, 0);
3682 }
3683
3684 /* --- Determine permissions. ---
3685 */
3686 sh_unix_getinfo_mode (&buf, &mode, theFile->c_mode);
3687
3688 /* --- Trivia. ---
3689 */
3690 theFile->dev = buf.st_dev;
3691 theFile->ino = buf.st_ino;
3692 theFile->mode = buf.st_mode;
3693 theFile->hardlinks = buf.st_nlink;
3694 theFile->owner = buf.st_uid;
3695 theFile->group = buf.st_gid;
3696 theFile->rdev = buf.st_rdev;
3697 theFile->size = buf.st_size;
3698 theFile->blksize = (unsigned long) buf.st_blksize;
3699 theFile->blocks = (unsigned long) buf.st_blocks;
3700 theFile->atime = buf.st_atime;
3701 theFile->mtime = buf.st_mtime;
3702 theFile->ctime = buf.st_ctime;
3703
3704
3705 /* --- Owner and group. ---
3706 */
3707
3708 if (NULL == sh_unix_getGIDname(SH_ERR_ALL, buf.st_gid, theFile->c_group, GROUP_MAX+1)) {
3709
3710 tmp2 = sh_util_safe_name (theFile->fullpath);
3711
3712 if (policy == SH_LEVEL_ALLIGNORE)
3713 {
3714 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
3715 MSG_FI_NOGRP,
3716 (long) buf.st_gid, tmp2);
3717 }
3718 else
3719 {
3720 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
3721 MSG_FI_NOGRP,
3722 (long) buf.st_gid, tmp2);
3723 }
3724 SH_FREE(tmp2);
3725 sl_snprintf(theFile->c_group, GROUP_MAX+1, "%d", (long) buf.st_gid);
3726 }
3727
3728
3729 if (NULL == sh_unix_getUIDname(SH_ERR_ALL, buf.st_uid, theFile->c_owner, USER_MAX+1)) {
3730
3731 tmp2 = sh_util_safe_name (theFile->fullpath);
3732
3733 if (policy == SH_LEVEL_ALLIGNORE)
3734 {
3735 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
3736 MSG_FI_NOUSR,
3737 (long) buf.st_uid, tmp2);
3738 }
3739 else
3740 {
3741 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
3742 MSG_FI_NOUSR,
3743 (long) buf.st_uid, tmp2);
3744 }
3745 SH_FREE(tmp2);
3746 sl_snprintf(theFile->c_owner, USER_MAX+1, "%d", (long) buf.st_uid);
3747 }
3748
3749 /* --- Output the file. ---
3750 */
3751 if (flag_err_debug == SL_TRUE)
3752 {
3753 tmp2 = sh_util_safe_name ((filename == NULL) ?
3754 theFile->fullpath : filename);
3755 (void) sh_unix_time(theFile->mtime, timestr, sizeof(timestr));
3756 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LIST,
3757 theFile->c_mode,
3758 theFile->hardlinks,
3759 theFile->c_owner,
3760 theFile->c_group,
3761 (unsigned long) theFile->size,
3762 timestr,
3763 tmp2);
3764 SH_FREE(tmp2);
3765 }
3766
3767 /* --- Check for links. ---
3768 */
3769 if (theFile->c_mode[0] == 'l')
3770 {
3771 linknamebuf = SH_ALLOC(PATH_MAX);
3772
3773 /* flawfinder: ignore */
3774 linksize = readlink (theFile->fullpath, linknamebuf, PATH_MAX-1);
3775
3776 if (linksize < (PATH_MAX-1) && linksize >= 0)
3777 linknamebuf[linksize] = '\0';
3778 else
3779 linknamebuf[PATH_MAX-1] = '\0';
3780
3781 if (linksize < 0)
3782 {
3783 char errbuf[SH_ERRBUF_SIZE];
3784 linksize = errno;
3785 tmp2 = sh_util_safe_name (theFile->fullpath);
3786 sh_error_handle (level, FIL__, __LINE__, linksize, MSG_FI_RDLNK,
3787 sh_error_message (linksize, errbuf, sizeof(errbuf)), tmp2);
3788 SH_FREE(tmp2);
3789 SH_FREE(linknamebuf);
3790 theFile->link_path = sh_util_strdup("-");
3791 SL_RETURN((-1),_("sh_unix_getinfo"));
3792 }
3793
3794 if (linknamebuf[0] == '/')
3795 {
3796 theFile->link_path = sh_util_strdup (linknamebuf);
3797 }
3798 else
3799 {
3800 tmp = sh_util_dirname(theFile->fullpath);
3801 if (tmp) {
3802 theFile->link_path = SH_ALLOC(PATH_MAX);
3803 sl_strlcpy (theFile->link_path, tmp, PATH_MAX);
3804 SH_FREE(tmp);
3805 } else {
3806 theFile->link_path = SH_ALLOC(PATH_MAX);
3807 theFile->link_path[0] = '\0';
3808 }
3809 /*
3810 * Only attach '/' if not root directory. Handle "//", which
3811 * according to POSIX is implementation-defined, and may be
3812 * different from "/" (however, three or more '/' will collapse
3813 * to one).
3814 */
3815 tmp = theFile->link_path; while (*tmp == '/') ++tmp;
3816 if (*tmp != '\0')
3817 {
3818 sl_strlcat (theFile->link_path, "/", PATH_MAX);
3819 }
3820 sl_strlcat (theFile->link_path, linknamebuf, PATH_MAX);
3821 }
3822
3823 /* stat the link
3824 */
3825 stat_return = retry_lstat (FIL__, __LINE__, theFile->link_path, &lbuf);
3826
3827 /* check for error
3828 */
3829 if (stat_return != 0)
3830 {
3831 stat_return = errno;
3832 tmp = sh_util_safe_name (theFile->fullpath);
3833 tmp2 = sh_util_safe_name (theFile->link_path);
3834 if (stat_return != ENOENT)
3835 {
3836 uid_t euid;
3837 char errbuf[SH_ERRBUF_SIZE];
3838
3839 (void) sl_get_euid(&euid);
3840 sh_error_handle (level, FIL__, __LINE__, stat_return,
3841 MSG_FI_STAT,
3842 _("lstat"),
3843 sh_error_message (stat_return,errbuf, sizeof(errbuf)),
3844 (long) euid,
3845 tmp2);
3846 }
3847 else
3848 {
3849 /* a dangling link -- everybody seems to have plenty of them
3850 */
3851 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_DLNK,
3852 tmp, tmp2);
3853 }
3854 theFile->linkisok = BAD;
3855 SH_FREE(tmp);
3856 SH_FREE(tmp2);
3857 SH_FREE(linknamebuf);
3858 /*
3859 * changed Tue Feb 10 16:16:13 CET 2004:
3860 * add dangling symlinks into database
3861 * SL_RETURN((-1),_("sh_unix_getinfo"));
3862 */
3863 theFile->linkmode = 0;
3864 SL_RETURN((0),_("sh_unix_getinfo"));
3865 }
3866
3867 theFile->linkisok = GOOD;
3868
3869
3870 /* --- Determine file type. ---
3871 */
3872 sh_unix_getinfo_type (&lbuf, &type, theFile->link_c_mode);
3873 theFile->type = type;
3874
3875 /* --- Determine permissions. ---
3876 */
3877 sh_unix_getinfo_mode (&lbuf, &mode, theFile->link_c_mode);
3878 theFile->linkmode = lbuf.st_mode;
3879
3880 /* --- Output the link. ---
3881 */
3882 if (theFile->linkisok == GOOD)
3883 {
3884 tmp2 = sh_util_safe_name (linknamebuf);
3885 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LLNK,
3886 theFile->link_c_mode, tmp2);
3887 SH_FREE(tmp2);
3888 }
3889 SH_FREE(linknamebuf);
3890 }
3891 else /* not a link */
3892 {
3893 if (content)
3894 {
3895#ifdef HAVE_LIBZ
3896 unsigned long clen;
3897 unsigned char * compressed;
3898#ifdef HAVE_COMPRESSBOUND
3899 clen = compressBound(sh_string_len(content));
3900#else
3901 if (sh_string_len(content) > 10*SH_TXT_MAX)
3902 clen = SH_TXT_MAX;
3903 else
3904 clen = 13 + (int)(1.0001*sh_string_len(content));
3905#endif
3906 compressed = SH_ALLOC(clen);
3907 if (Z_OK == compress(compressed, &clen,
3908 (unsigned char *) sh_string_str(content),
3909 sh_string_len(content)))
3910 {
3911 if (clen < SH_TXT_MAX)
3912 {
3913 sh_util_base64_enc_alloc (&(theFile->link_path),
3914 (char *) compressed, clen);
3915 }
3916 else
3917 {
3918 char tmsg[128];
3919 char * tpath = sh_util_safe_name (theFile->fullpath);
3920 sl_snprintf(tmsg, sizeof(tmsg),
3921 _("compressed file too large (%lu bytes)"),
3922 clen);
3923 sh_error_handle (SH_ERR_WARN, FIL__, __LINE__, -1,
3924 MSG_E_SUBGPATH, tmsg,
3925 _("sh_unix_getinfo"), tpath);
3926 SH_FREE(tpath);
3927 }
3928 }
3929 SH_FREE(compressed);
3930#endif
3931 sh_string_destroy(&content);
3932 }
3933 }
3934 SL_RETURN((0),_("sh_unix_getinfo"));
3935}
3936
3937/* #if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE) */
3938#endif
3939
3940int sh_unix_unlock(char * lockfile, char * flag)
3941{
3942 int error = 0;
3943
3944 SL_ENTER(_("sh_unix_unlock"));
3945
3946 if (sh.flag.isdaemon == S_FALSE && flag == NULL)
3947 SL_RETURN((0),_("sh_unix_unlock"));
3948
3949 /* --- Logfile is not locked to us. ---
3950 */
3951 if (sh.flag.islocked == BAD && flag != NULL)
3952 SL_RETURN((-1),_("sh_unix_unlock"));
3953
3954 /* --- Check whether the directory is secure. ---
3955 */
3956 if (0 != tf_trust_check (lockfile, SL_YESPRIV))
3957 SL_RETURN((-1),_("sh_unix_unlock"));
3958
3959 /* --- Delete the lock file. ---
3960 */
3961 error = retry_aud_unlink (FIL__, __LINE__, lockfile);
3962
3963 if (error == 0)
3964 {
3965 if (flag != NULL)
3966 sh.flag.islocked = BAD; /* not locked anymore */
3967 }
3968 else if (flag != NULL)
3969 {
3970 char errbuf[SH_ERRBUF_SIZE];
3971 error = errno;
3972 sh_error_handle ((-1), FIL__, __LINE__, error, MSG_E_UNLNK,
3973 sh_error_message(error, errbuf, sizeof(errbuf)),
3974 lockfile);
3975 SL_RETURN((-1),_("sh_unix_unlock"));
3976 }
3977 SL_RETURN((0),_("sh_unix_unlock"));
3978}
3979
3980int sh_unix_lock (char * lockfile, char * flag)
3981{
3982 int filed;
3983 int errnum;
3984 char myPid[64];
3985 SL_TICKET fd;
3986 extern int get_the_fd (SL_TICKET ticket);
3987
3988 SL_ENTER(_("sh_unix_lock"));
3989
3990 sprintf (myPid, "%ld\n", (long) sh.pid); /* known to fit */
3991
3992 fd = sl_open_safe_rdwr (lockfile, SL_YESPRIV); /* fails if file exists */
3993
3994 if (!SL_ISERROR(fd))
3995 {
3996 errnum = sl_write (fd, myPid, sl_strlen(myPid));
3997 filed = get_the_fd(fd);
3998 fchmod (filed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
3999 sl_close (fd);
4000
4001 if (!SL_ISERROR(errnum))
4002 {
4003 if (flag != NULL)
4004 sh.flag.islocked = GOOD;
4005 SL_RETURN((0),_("sh_unix_lock"));
4006 }
4007 }
4008
4009 TPT((0, FIL__, __LINE__, _("msg=<open pid file failed>\n")));
4010 if (flag != NULL)
4011 sh.flag.islocked = BAD;
4012 SL_RETURN((-1),_("sh_unix_lock"));
4013
4014 /* notreached */
4015}
4016
4017
4018/* check whether file is locked
4019 */
4020int sh_unix_test_and_lock (char * filename, char * lockfile)
4021{
4022 static struct stat buf;
4023 int status = 0;
4024
4025
4026 SL_TICKET fd;
4027 char line_in[128];
4028
4029 SL_ENTER(_("sh_unix_test_and_lock"));
4030
4031 status = retry_lstat (FIL__, __LINE__, lockfile, &buf);
4032
4033 /* --- No lock file found, try to lock. ---
4034 */
4035
4036 if (status < 0 && errno == ENOENT)
4037 {
4038 if (0 == sh_unix_lock (lockfile, filename))
4039 {
4040 if (filename != NULL)
4041 sh.flag.islocked = GOOD;
4042 SL_RETURN((0),_("sh_unix_test_and_lock"));
4043 }
4044 else
4045 {
4046 sh_error_handle ((-1), FIL__, __LINE__, status,
4047 MSG_E_SUBGEN,
4048 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
4049 _("sh_unix_test_and_lock"));
4050 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4051 }
4052 }
4053 else if (status == 0 && buf.st_size == 0)
4054 {
4055 if (filename != NULL)
4056 sh.flag.islocked = GOOD;
4057 sh_unix_unlock (lockfile, filename);
4058 if (filename != NULL)
4059 sh.flag.islocked = BAD;
4060 if (0 == sh_unix_lock (lockfile, filename))
4061 {
4062 if (filename != NULL)
4063 sh.flag.islocked = GOOD;
4064 SL_RETURN((0),_("sh_unix_test_and_lock"));
4065 }
4066 else
4067 {
4068 sh_error_handle ((-1), FIL__, __LINE__, status,
4069 MSG_E_SUBGEN,
4070 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
4071 _("sh_unix_test_and_lock"));
4072 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4073 }
4074 }
4075
4076 /* --- Check on lock. ---
4077 */
4078
4079 if (status >= 0)
4080 {
4081 fd = sl_open_read (lockfile, SL_YESPRIV);
4082 if (SL_ISERROR(fd))
4083 sh_error_handle ((-1), FIL__, __LINE__, fd,
4084 MSG_E_SUBGEN,
4085 (filename == NULL) ? _("Cannot open PID file for read") : _("Cannot open lock file for read"),
4086 _("sh_unix_test_and_lock"));
4087 }
4088 else
4089 fd = -1;
4090
4091 if (!SL_ISERROR(fd))
4092 {
4093 /* read the PID in the lock file
4094 */
4095 status = sl_read (fd, line_in, sizeof(line_in));
4096 line_in[sizeof(line_in)-1] = '\0';
4097
4098 /* convert to numeric
4099 */
4100 if (status > 0)
4101 {
4102 errno = 0;
4103 status = strtol(line_in, (char **)NULL, 10);
4104 if (errno == ERANGE || status <= 0)
4105 {
4106 sh_error_handle ((-1), FIL__, __LINE__, status,
4107 MSG_E_SUBGEN,
4108 (filename == NULL) ? _("Bad PID in PID file") : _("Bad PID in lock file"),
4109 _("sh_unix_test_and_lock"));
4110
4111 status = -1;
4112 }
4113 }
4114 else
4115 {
4116 sh_error_handle ((-1), FIL__, __LINE__, status,
4117 MSG_E_SUBGEN,
4118 (filename == NULL) ? _("Cannot read PID file") : _("Cannot read lock file"),
4119 _("sh_unix_test_and_lock"));
4120 }
4121 sl_close(fd);
4122
4123 if (status > 0 && (unsigned int) status == sh.pid)
4124 {
4125 if (filename != NULL)
4126 sh.flag.islocked = GOOD;
4127 SL_RETURN((0),_("sh_unix_test_and_lock"));
4128 }
4129
4130
4131 /* --- Check whether the process exists. ---
4132 */
4133 if (status > 0)
4134 {
4135 errno = 0;
4136 status = aud_kill (FIL__, __LINE__, status, 0);
4137
4138 /* Does not exist, so remove the stale lock
4139 * and create a new one.
4140 */
4141 if (status < 0 && errno == ESRCH)
4142 {
4143 if (filename != NULL)
4144 sh.flag.islocked = GOOD;
4145 if (0 != sh_unix_unlock(lockfile, filename) && (filename !=NULL))
4146 sh.flag.islocked = BAD;
4147 else
4148 {
4149 if (0 == sh_unix_lock (lockfile, filename))
4150 {
4151 if (filename != NULL)
4152 sh.flag.islocked = GOOD;
4153 SL_RETURN((0),_("sh_unix_test_and_lock"));
4154 }
4155 else
4156 {
4157 sh_error_handle ((-1), FIL__, __LINE__, status,
4158 MSG_E_SUBGEN,
4159 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
4160 _("sh_unix_test_and_lock"));
4161 }
4162 if (filename != NULL)
4163 sh.flag.islocked = BAD;
4164 }
4165 }
4166 else
4167 {
4168 sh_error_handle ((-1), FIL__, __LINE__, status,
4169 MSG_E_SUBGEN,
4170 (filename == NULL) ? _("Cannot remove stale PID file, PID may be a running process") : _("Cannot remove stale lock file, PID may be a running process"),
4171 _("sh_unix_test_and_lock"));
4172 if (filename != NULL)
4173 sh.flag.islocked = BAD;
4174 }
4175 }
4176 }
4177 SL_RETURN((-1),_("sh_unix_testlock"));
4178}
4179
4180/* write the PID file
4181 */
4182int sh_unix_write_pid_file()
4183{
4184 return sh_unix_test_and_lock(NULL, sh.srvlog.alt);
4185}
4186
4187/* write lock for filename
4188 */
4189int sh_unix_write_lock_file(char * filename)
4190{
4191 size_t len;
4192 int res;
4193 char * lockfile;
4194
4195 if (filename == NULL)
4196 return (-1);
4197
4198 len = sl_strlen(filename);
4199 if (sl_ok_adds(len, 6))
4200 len += 6;
4201 lockfile = SH_ALLOC(len);
4202 sl_strlcpy(lockfile, filename, len);
4203 sl_strlcat(lockfile, _(".lock"), len);
4204 res = sh_unix_test_and_lock(filename, lockfile);
4205 SH_FREE(lockfile);
4206 return res;
4207}
4208
4209/* rm lock for filename
4210 */
4211int sh_unix_rm_lock_file(char * filename)
4212{
4213 size_t len;
4214 int res;
4215 char * lockfile;
4216
4217 if (filename == NULL)
4218 return (-1);
4219
4220 len = sl_strlen(filename);
4221 if (sl_ok_adds(len, 6))
4222 len += 6;
4223 lockfile = SH_ALLOC(len);
4224 sl_strlcpy(lockfile, filename, len);
4225 sl_strlcat(lockfile, _(".lock"), len);
4226
4227 res = sh_unix_unlock(lockfile, filename);
4228 SH_FREE(lockfile);
4229 return res;
4230}
4231
4232/* rm lock for filename
4233 */
4234int sh_unix_rm_pid_file()
4235{
4236 return sh_unix_unlock(sh.srvlog.alt, NULL);
4237}
4238
4239/* Test whether file exists
4240 */
4241int sh_unix_file_exists(char * path)
4242{
4243 struct stat buf;
4244
4245 SL_ENTER(_("sh_unix_file_exists"));
4246
4247 if (-1 == retry_stat(FIL__, __LINE__, path, &buf))
4248 SL_RETURN( S_FALSE, _("sh_unix_file_exists"));
4249 else
4250 SL_RETURN( S_TRUE, _("sh_unix_file_exists"));
4251}
4252
4253
4254/* Test whether file exists, is a character device, and allows read
4255 * access.
4256 */
4257int sh_unix_device_readable(int fd)
4258{
4259 struct stat buf;
4260
4261 SL_ENTER(_("sh_unix_device_readable"));
4262
4263 if (retry_fstat(FIL__, __LINE__, fd, &buf) == -1)
4264 SL_RETURN( (-1), _("sh_unix_device_readable"));
4265 else if ( S_ISCHR(buf.st_mode) && 0 != (S_IROTH & buf.st_mode) )
4266 SL_RETURN( (0), _("sh_unix_device_readable"));
4267 else
4268 SL_RETURN( (-1), _("sh_unix_device_readable"));
4269}
4270
4271static char preq[16];
4272
4273/* return true if database is remote
4274 */
4275int file_is_remote ()
4276{
4277 static int init = 0;
4278 struct stat buf;
4279
4280 SL_ENTER(_("file_is_remote"));
4281
4282 if (init == 0)
4283 {
4284 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4285 ++init;
4286 }
4287 if (0 == sl_strncmp (sh.data.path, preq, 15))
4288 {
4289 if (sh.data.path[15] != '\0') /* should be start of path */
4290 {
4291 if (0 == stat(&(sh.data.path[15]), &buf))
4292 {
4293 SL_RETURN( S_FALSE, _("file_is_remote"));
4294 }
4295 }
4296 SL_RETURN( S_TRUE, _("file_is_remote"));
4297 }
4298 SL_RETURN( S_FALSE, _("file_is_remote"));
4299}
4300
4301/* Return the path to the configuration/database file.
4302 */
4303char * file_path(char what, char flag)
4304{
4305 static int init = 0;
4306
4307 SL_ENTER(_("file_path"));
4308
4309 if (init == 0)
4310 {
4311 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4312 ++init;
4313 }
4314
4315 switch (what)
4316 {
4317
4318 case 'C':
4319 if (0 == sl_strncmp (sh.conf.path, preq, 15))
4320 {
4321#if defined(SH_WITH_SERVER)
4322 if (sh.flag.isserver == S_TRUE && sl_strlen(sh.conf.path) == 15)
4323 SL_RETURN( NULL, _("file_path"));
4324 if (sh.flag.isserver == S_TRUE)
4325 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4326#endif
4327 if (flag == 'R')
4328 SL_RETURN( preq, _("file_path"));
4329 if (flag == 'I')
4330 {
4331 if (sl_strlen(sh.conf.path) == 15)
4332 SL_RETURN( NULL, _("file_path"));
4333 else
4334 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4335 }
4336 SL_RETURN ( preq, _("file_path"));
4337 }
4338 else
4339 SL_RETURN( sh.conf.path, _("file_path"));
4340 /* break; *//* unreachable */
4341
4342 case 'D':
4343 if (0 == sl_strncmp (sh.data.path, preq, 15))
4344 {
4345 if (flag == 'R')
4346 SL_RETURN( preq, _("file_path"));
4347 if (flag == 'W' && sl_strlen(sh.data.path) == 15)
4348 SL_RETURN (NULL, _("file_path"));
4349 if (flag == 'W')
4350 SL_RETURN( &(sh.data.path[15]), _("file_path"));
4351 }
4352 else
4353 SL_RETURN( sh.data.path, _("file_path"));
4354 break;
4355
4356 default:
4357 SL_RETURN( NULL, _("file_path"));
4358 }
4359
4360 return NULL; /* notreached */
4361}
4362/************************************************/
4363/**** Mlock Utilities ****/
4364/************************************************/
4365
4366#include <limits.h>
4367
4368int sh_unix_pagesize()
4369{
4370 int pagesize = 4096;
4371#if defined(_SC_PAGESIZE)
4372 pagesize = sysconf(_SC_PAGESIZE);
4373#elif defined(_SC_PAGE_SIZE)
4374 pagesize = sysconf(_SC_PAGE_SIZE);
4375#elif defined(HAVE_GETPAGESIZE)
4376 pagesize = getpagesize();
4377#elif defined(PAGESIZE)
4378 pagesize = PAGESIZE;
4379#endif
4380
4381 return ((pagesize > 0) ? pagesize : 4096);
4382}
4383
4384typedef struct sh_page_lt {
4385 unsigned long page_start;
4386 int page_refcount;
4387 char file[64];
4388 int line;
4389 struct sh_page_lt * next;
4390} sh_page_l;
4391
4392sh_page_l * sh_page_locked = NULL;
4393volatile int page_locking = 0;
4394
4395unsigned long sh_unix_lookup_page (void * in_addr, size_t len, int * num_pages)
4396{
4397 int pagesize = sh_unix_pagesize();
4398 unsigned long addr = (unsigned long) in_addr;
4399
4400 unsigned long pagebase;
4401 unsigned long pagediff;
4402 unsigned long pagenum = addr / pagesize;
4403
4404 SL_ENTER(_("sh_unix_lookup_page"));
4405#if 0
4406 fprintf(stderr, "mlock: --> base %ld, pagenum: %ld\n",
4407 addr, pagenum);
4408#endif
4409
4410 /* address of first page
4411 */
4412 pagebase = pagenum * pagesize;
4413
4414 /* number of pages
4415 */
4416 pagediff = (addr + len) - pagebase;
4417 pagenum = pagediff / pagesize;
4418 if (pagenum * pagesize < pagediff)
4419 ++pagenum;
4420
4421#if 0
4422 fprintf(stderr, "mlock: --> pagebase %ld, pagediff %ld, (addr + len) %ld\n",
4423 pagebase, pagediff, (addr + len));
4424#endif
4425
4426 *num_pages = pagenum;
4427 SL_RETURN((pagebase), _("sh_unix_lookup_page"));
4428}
4429
4430
4431#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
4432
4433SH_MUTEX_STATIC(mutex_mlock,PTHREAD_MUTEX_INITIALIZER);
4434
4435int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
4436{
4437 int num_pages;
4438 int status = 0;
4439 int pagesize;
4440 sh_page_l * page_list = sh_page_locked;
4441 unsigned long addr;
4442#ifdef TEST_MLOCK
4443 int i = 0;
4444#endif
4445
4446 SL_ENTER(_("sh_unix_mlock"));
4447
4448 /* There's no cancellation point here, except if tracing is on
4449 */
4450 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
4451
4452 if (0 != page_locking)
4453 {
4454 status = -1;
4455 goto exit_mlock;
4456 }
4457
4458 page_locking = 1;
4459
4460 pagesize = sh_unix_pagesize();
4461 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
4462
4463#ifdef TEST_MLOCK
4464 fprintf(stderr, "mlock: addr %ld, base %ld, pages: %d, length %d\n",
4465 (unsigned long) in_addr, addr, num_pages, len);
4466#endif
4467
4468 /* increase refcount of locked pages
4469 * addr is first page; num_pages is #(consecutive pages) to lock
4470 */
4471
4472 while ((page_list != NULL) && (num_pages > 0))
4473 {
4474#ifdef TEST_MLOCK
4475 fprintf(stderr, "mlock: check page %d: %ld [%d]\n",
4476 i, page_list->page_start, page_list->page_refcount);
4477#endif
4478 if (page_list->page_start == addr)
4479 {
4480 page_list->page_refcount += 1;
4481 num_pages -= 1;
4482 addr += pagesize;
4483#ifdef TEST_MLOCK
4484 fprintf(stderr, "mlock: found page %d: %ld [%d], next page %ld\n",
4485 i, page_list->page_start, page_list->page_refcount, addr);
4486#endif
4487 }
4488#ifdef TEST_MLOCK
4489 ++i;
4490#endif
4491 page_list = page_list->next;
4492 }
4493
4494 /* mlock some more pages, if needed
4495 */
4496 while (num_pages > 0)
4497 {
4498#ifdef TEST_MLOCK
4499 fprintf(stderr, "mlock: lock page %d: mlock %ld [num_pages %d]\n",
4500 i, addr, num_pages);
4501 ++i;
4502#endif
4503 page_list = SH_ALLOC(sizeof(sh_page_l));
4504 page_list->page_start = addr;
4505 page_list->page_refcount = 1;
4506 sl_strlcpy(page_list->file, file, 64);
4507 page_list->line = line;
4508 status = mlock( (void *) addr, pagesize);
4509 if (status != 0)
4510 {
4511#ifdef TEST_MLOCK
4512 char errbuf[SH_ERRBUF_SIZE];
4513 fprintf(stderr, "mlock: error: %s\n",
4514 sh_error_message(errno, errbuf, sizeof(errbuf)));
4515#endif
4516 SH_FREE(page_list);
4517 page_locking = 0;
4518 goto exit_mlock;
4519 }
4520 page_list->next = sh_page_locked;
4521 sh_page_locked = page_list;
4522 num_pages -= 1;
4523 addr += pagesize;
4524 }
4525 page_locking = 0;
4526
4527 exit_mlock:
4528 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
4529
4530 SL_RETURN((status), _("sh_unix_mlock"));
4531}
4532#else
4533int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
4534{
4535 (void) file; (void) line;
4536 (void) in_addr; (void) len;
4537 return -1;
4538}
4539#endif
4540
4541#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
4542int sh_unix_munlock (void * in_addr, size_t len)
4543{
4544 int num_pages;
4545 int unlocked = 0;
4546 int status = 0;
4547 int pagesize;
4548 sh_page_l * page_list = sh_page_locked;
4549 sh_page_l * page_last;
4550 unsigned long addr;
4551
4552 int test_count;
4553 int test_status;
4554 int test_pages;
4555
4556#ifdef TEST_MLOCK
4557 int i = 0;
4558#endif
4559
4560 SL_ENTER(_("sh_unix_munlock"));
4561
4562 /* There's no cancellation point here, except if tracing is on
4563 */
4564 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
4565
4566 if (0 != page_locking)
4567 {
4568 status = -1;
4569 goto exit_munlock;
4570 }
4571 page_locking = 1;
4572
4573 pagesize = sh_unix_pagesize();
4574 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
4575
4576#ifdef TEST_MLOCK
4577 fprintf(stderr, "munlock: in_addr %ld, addr %ld, pages: %d, length %d\n",
4578 (unsigned long) in_addr, addr, num_pages, len);
4579#endif
4580
4581 test_pages = num_pages;
4582
4583 /* reduce refcount of locked pages
4584 * addr is first page; num_pages is #(consecutive pages) to lock
4585 */
4586 while ((page_list != NULL) && (num_pages > 0))
4587 {
4588#ifdef TEST_MLOCK
4589 fprintf(stderr, "munlock: page %d: %ld [%d]\n",
4590 i, page_list->page_start, page_list->page_refcount);
4591#endif
4592
4593 test_status = 0;
4594 for (test_count = 0; test_count < test_pages; ++test_count)
4595 {
4596 if (page_list->page_start == (addr + (test_count * pagesize)))
4597 {
4598 test_status = 1;
4599 break;
4600 }
4601 }
4602
4603 if (test_status == 1)
4604 {
4605 page_list->page_refcount -= 1;
4606 if (page_list->page_refcount == 0)
4607 {
4608 status = munlock ( (void *) addr, pagesize);
4609 ++unlocked;
4610 }
4611 num_pages -= 1;
4612#ifdef TEST_MLOCK
4613 fprintf(stderr,
4614 "munlock: page %d: %ld [refcount %d], refcount reduced\n",
4615 i, page_list->page_start, page_list->page_refcount);
4616#endif
4617 }
4618#ifdef TEST_MLOCK
4619 ++i;
4620#endif
4621 page_list = page_list->next;
4622 }
4623
4624#ifdef TEST_MLOCK
4625 i = 0;
4626#endif
4627
4628 if (unlocked > 0)
4629 {
4630 page_list = sh_page_locked;
4631 page_last = sh_page_locked;
4632
4633 while ((page_list != NULL) && (unlocked > 0))
4634 {
4635 if (page_list->page_refcount == 0)
4636 {
4637#ifdef TEST_MLOCK
4638 fprintf(stderr, "munlock: remove page %d: %ld [refcount %d]\n",
4639 i, page_list->page_start, page_list->page_refcount);
4640#endif
4641 if (page_last != page_list)
4642 {
4643 page_last->next = page_list->next;
4644 SH_FREE(page_list);
4645 page_list = page_last->next;
4646 }
4647 else
4648 {
4649 page_last = page_list->next;
4650 if (page_list == sh_page_locked)
4651 sh_page_locked = page_list->next;
4652 SH_FREE(page_list);
4653 page_list = page_last;
4654 }
4655 --unlocked;
4656 }
4657 else
4658 {
4659#ifdef TEST_MLOCK
4660 fprintf(stderr, "munlock: skip page %d: %ld [refcount %d]\n",
4661 i, page_list->page_start, page_list->page_refcount);
4662#endif
4663
4664 page_last = page_list;
4665 page_list = page_list->next;
4666 }
4667#ifdef TEST_MLOCK
4668 ++i;
4669#endif
4670 }
4671 }
4672
4673 page_locking = 0;
4674
4675 exit_munlock:
4676 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
4677 SL_RETURN((status), _("sh_unix_munlock"));
4678}
4679#else
4680int sh_unix_munlock (void * in_addr, size_t len)
4681{
4682 (void) in_addr; (void) len;
4683 return -1;
4684}
4685#endif
4686
4687int sh_unix_count_mlock()
4688{
4689 int i = 0;
4690 char str[128];
4691 sh_page_l * page_list = sh_page_locked;
4692
4693 SL_ENTER(_("sh_unix_count_mlock"));
4694 while (page_list != NULL)
4695 {
4696#ifdef WITH_TPT
4697 sl_snprintf(str, sizeof(str), _("file: %s line: %d page: %d"),
4698 page_list->file, page_list->line, i+1);
4699 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, i, MSG_E_SUBGEN,
4700 str, _("sh_unix_count_mlock"));
4701#endif
4702 page_list = page_list->next;
4703 ++i;
4704 }
4705 sl_snprintf(str, sizeof(str), _("%d pages locked"), i);
4706 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, i, MSG_E_SUBGEN,
4707 str, _("sh_unix_count_mlock"));
4708 SL_RETURN((i), _("sh_unix_count_mlock"));
4709}
4710
4711/************************************************/
4712/************************************************/
4713/**** Stealth Utilities ****/
4714/************************************************/
4715/************************************************/
4716#ifdef SH_STEALTH
4717
4718void sh_unix_xor_code (char * str, int len)
4719{
4720 register int i;
4721
4722 for (i = 0; i < len; ++i) str[i] ^= (char) XOR_CODE;
4723 return;
4724}
4725
4726#if !defined(SH_STEALTH_MICRO)
4727
4728
4729int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
4730 unsigned long * bytes_read);
4731unsigned long first_hex_block(SL_TICKET fd, unsigned long * max);
4732
4733/*
4734 * --- Get hidden data from a block of hex data. ---
4735 */
4736int sh_unix_getline_stealth (SL_TICKET fd, char * str, int len)
4737{
4738 int add_off = 0, llen;
4739 static unsigned long off_data = 0;
4740 static unsigned long max_data = 0;
4741 static unsigned long bytes_read = 0;
4742 static int stealth_init = BAD;
4743
4744 SL_ENTER(_("sh_unix_getline_stealth"));
4745
4746 if (str == NULL)
4747 {
4748 off_data = 0;
4749 max_data = 0;
4750 bytes_read = 0;
4751 stealth_init = BAD;
4752 SL_RETURN(0, _("sh_unix_getline_stealth"));
4753 }
4754
4755 /* --- Initialize. ---
4756 */
4757 if (stealth_init == BAD)
4758 {
4759 off_data = first_hex_block(fd, &max_data);
4760 if (off_data == 0)
4761 {
4762 dlog(1, FIL__, __LINE__,
4763 _("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"));
4764 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
4765 _("Stealth config file."));
4766 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
4767 }
4768 stealth_init = GOOD;
4769 max_data += off_data;
4770 }
4771
4772 /* --- Seek to proper position. ---
4773 */
4774 if (bytes_read >= max_data || add_off < 0)
4775 {
4776 dlog(1, FIL__, __LINE__,
4777 _("The capacity of the container image file for the stealth config file seems to be too small. Your config file is likely truncated.\n"));
4778 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
4779 _("Stealth config file."));
4780 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
4781 }
4782 sl_seek(fd, off_data);
4783
4784 /* --- Read one line. ---
4785 */
4786 add_off = hideout_hex_block(fd, (unsigned char *) str, len, &bytes_read);
4787 off_data += add_off;
4788
4789 llen = sl_strlen(str);
4790 SL_RETURN(llen, _("sh_unix_getline_stealth"));
4791}
4792
4793int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
4794 unsigned long * bytes_read)
4795{
4796
4797 register int i, j, k;
4798 unsigned char c, e;
4799 register int num;
4800 unsigned char mask[9] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
4801 unsigned long here = 0;
4802 unsigned long retval = 0;
4803 unsigned long bread = 0;
4804
4805 SL_ENTER(_("hideout_hex_block"));
4806
4807 ASSERT_RET((len > 1), _("len > 1"), (0));
4808
4809 --len;
4810
4811 i = 0;
4812 while (i < len)
4813 {
4814 for (j = 0; j < 8; ++j)
4815 {
4816
4817 /* --- Get a low byte, modify, read back. ---
4818 */
4819 for (k = 0; k < 2; ++k)
4820 {
4821 /* -- Skip whitespace. ---
4822 */
4823 c = ' ';
4824 do {
4825 do {
4826 num = sl_read (fd, &c, 1);
4827 } while (num == 0 && errno == EINTR);
4828 if (num > 0)
4829 ++here;
4830 else if (num == 0)
4831 SL_RETURN((0), _("hideout_hex_block"));
4832 else
4833 SL_RETURN((-1), _("hideout_hex_block"));
4834 } while (c == '\n' || c == '\t' || c == '\r' ||
4835 c == ' ');
4836 }
4837
4838
4839 /* --- e is the value of the low byte. ---
4840 */
4841 e = (unsigned char) sh_util_hexchar( c );
4842 if ((e & mask[7]) != 0) /* bit is set */
4843 str[i] |= mask[j];
4844 else /* bit is not set */
4845 str[i] &= ~mask[j];
4846
4847 bread += 1;
4848 }
4849 if (str[i] == '\n') break;
4850 ++i;
4851 }
4852
4853 if (i != 0)
4854 str[i] = '\0';
4855 else
4856 str[i+1] = '\0'; /* keep newline and terminate */
4857 retval += here;
4858 *bytes_read += (bread/8);
4859
4860 SL_RETURN(retval, _("hideout_hex_block"));
4861}
4862
4863/* --- Get offset of first data block. ---
4864 */
4865unsigned long first_hex_block(SL_TICKET fd, unsigned long * max)
4866{
4867 unsigned int i;
4868 long num = 1;
4869 unsigned long lnum;
4870 char c;
4871 int nothex = 0;
4872 unsigned long retval = 0;
4873 unsigned int this_line = 0;
4874 char theline[SH_BUFSIZE];
4875
4876 SL_ENTER(_("first_hex_block"));
4877
4878 *max = 0;
4879
4880 while (1)
4881 {
4882 theline[0] = '\0';
4883 this_line = 0;
4884 c = '\0';
4885 while (c != '\n' && num > 0 && this_line < (sizeof(theline)-1))
4886 {
4887 do {
4888 num = sl_read (fd, &c, 1);
4889 } while (num == 0 && errno == EINTR);
4890 if (num > 0)
4891 theline[this_line] = c;
4892 else
4893 SL_RETURN((0), _("first_hex_block"));
4894 ++this_line;
4895 }
4896 theline[this_line] = '\0';
4897
4898 /* not only 'newline' */
4899 if (this_line > 60)
4900 {
4901 nothex = 0;
4902 i = 0;
4903 while (nothex == 0 && i < (this_line-1))
4904 {
4905 if (! isxdigit((int)theline[i])) nothex = 1;
4906 ++i;
4907 }
4908 if (nothex == 1) retval += this_line;
4909 }
4910 else
4911 {
4912 nothex = 1;
4913 retval += this_line;
4914 }
4915
4916 if (nothex == 0)
4917 {
4918 *max = 0;
4919 do {
4920 do {
4921 num = sl_read (fd, theline, SH_BUFSIZE);
4922 } while (num == 0 && errno == EINTR);
4923 if (num > 0)
4924 {
4925 lnum = (unsigned long) num;
4926 for (i = 0; i < lnum; ++i)
4927 {
4928 c = theline[i];
4929 if (c == '\n' || c == '\t' || c == '\r' || c == ' ')
4930 ;
4931 else if (!isxdigit((int)c))
4932 break;
4933 else
4934 *max += 1;
4935 }
4936 }
4937 } while (num > 0);
4938
4939 *max /= 16;
4940 SL_RETURN((retval), _("first_hex_block"));
4941 }
4942
4943 }
4944 /* SL_RETURN((0), _("first_hex_block")); *//* unreachable */
4945}
4946
4947 /* if !defined(SH_STEALTH_MICRO) */
4948#endif
4949
4950 /* ifdef SH_STEALTH */
4951#endif
4952
4953/*
4954 * anti-debugger code
4955 */
4956#if defined(SCREW_IT_UP)
4957volatile int sh_not_traced = 0;
4958
4959#ifdef HAVE_GETTIMEOFDAY
4960struct timeval save_tv;
4961#endif
4962
4963void sh_sigtrap_handler (int signum)
4964{
4965#ifdef HAVE_GETTIMEOFDAY
4966 struct timeval tv;
4967 long difftv;
4968
4969 gettimeofday(&tv, NULL);
4970 difftv = (tv.tv_sec - save_tv.tv_sec) * 1000000 +
4971 (tv.tv_usec - save_tv.tv_usec);
4972 if (difftv > 500000)
4973 _exit(6);
4974#endif
4975 sh_not_traced += signum;
4976 return;
4977}
4978#endif
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