source: trunk/src/sh_unix.c@ 204

Last change on this file since 204 was 203, checked in by katerina, 16 years ago

Fix compile failures on RHEL3 (ticket #130) and FreeBSD7 amd64 (ticket #131).
File size: 116.2 KB
Line 
1/* SAMHAIN file system integrity testing */
2/* Copyright (C) 1999 Rainer Wichmann */
3/* */
4/* This program is free software; you can redistribute it */
5/* and/or modify */
6/* it under the terms of the GNU General Public License as */
7/* published by */
8/* the Free Software Foundation; either version 2 of the License, or */
9/* (at your option) any later version. */
10/* */
11/* This program is distributed in the hope that it will be useful, */
12/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
13/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
14/* GNU General Public License for more details. */
15/* */
16/* You should have received a copy of the GNU General Public License */
17/* along with this program; if not, write to the Free Software */
18/* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20#include "config_xor.h"
21
22
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26#include <ctype.h>
27#ifdef HAVE_LINUX_FS_H
28#include <linux/fs.h>
29#endif
30
31#ifdef HAVE_MEMORY_H
32#include <memory.h>
33#endif
34
35#ifdef HAVE_UNISTD_H
36#include <errno.h>
37#include <signal.h>
38#include <pwd.h>
39#include <grp.h>
40#include <sys/types.h>
41#include <sys/stat.h>
42#include <sys/resource.h>
43#include <fcntl.h>
44#include <unistd.h>
45/* need to undef these, since the #define's may be picked up from
46 * linux/wait.h, and will clash with a typedef in sys/wait.h
47 */
48#undef P_ALL
49#undef P_PID
50#undef P_PGID
51#include <sys/wait.h>
52
53/*********************
54#ifdef HAVE_SYS_VFS_H
55#include <sys/vfs.h>
56#endif
57**********************/
58#endif
59
60#if TIME_WITH_SYS_TIME
61#include <sys/time.h>
62#include <time.h>
63#else
64#if HAVE_SYS_TIME_H
65#include <sys/time.h>
66#else
67#include <time.h>
68#endif
69#endif
70
71#ifdef HAVE_SYS_SELECT_H
72#include <sys/select.h>
73#endif
74
75#ifndef FD_SET
76#define NFDBITS 32
77#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
78#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
79#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
80#endif /* !FD_SET */
81#ifndef FD_SETSIZE
82#define FD_SETSIZE 32
83#endif
84#ifndef FD_ZERO
85#define FD_ZERO(p) memset((char *)(p), '\0', sizeof(*(p)))
86#endif
87
88
89#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
90#include <sys/mman.h>
91#endif
92
93#include "samhain.h"
94#include "sh_error.h"
95#include "sh_unix.h"
96#include "sh_utils.h"
97#include "sh_mem.h"
98#include "sh_hash.h"
99#include "sh_tools.h"
100#include "sh_tiger.h"
101#include "sh_prelink.h"
102#include "sh_pthread.h"
103
104/* moved here from far below
105 */
106#include <netdb.h>
107
108#define SH_NEED_PWD_GRP
109#define SH_NEED_GETHOSTBYXXX
110#include "sh_static.h"
111
112#ifndef HAVE_LSTAT
113#define lstat stat
114#endif
115
116#if defined(S_IFLNK) && !defined(S_ISLNK)
117#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
118#else
119#if !defined(S_ISLNK)
120#define S_ISLNK(mode) (0)
121#endif
122#endif
123
124#if defined(S_IFSOCK) && !defined(S_ISSOCK)
125#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
126#else
127#if !defined(S_ISSOCK)
128#define S_ISSOCK(mode) (0)
129#endif
130#endif
131
132#if defined(S_IFDOOR) && !defined(S_ISDOOR)
133#define S_ISDOOR(mode) (((mode) & S_IFMT) == S_IFDOOR)
134#else
135#if !defined(S_ISDOOR)
136#define S_ISDOOR(mode) (0)
137#endif
138#endif
139
140#if defined(S_IFPORT) && !defined(S_ISPORT)
141#define S_ISPORT(mode) (((mode) & S_IFMT) == S_IFPORT)
142#else
143#if !defined(S_ISPORT)
144#define S_ISPORT(mode) (0)
145#endif
146#endif
147
148#define SH_KEY_NULL _("000000000000000000000000000000000000000000000000")
149
150#undef FIL__
151#define FIL__ _("sh_unix.c")
152
153unsigned long mask_PRELINK = MASK_PRELINK_;
154unsigned long mask_USER0 = MASK_USER_;
155unsigned long mask_USER1 = MASK_USER_;
156unsigned long mask_USER2 = MASK_USER_;
157unsigned long mask_USER3 = MASK_USER_;
158unsigned long mask_USER4 = MASK_USER_;
159unsigned long mask_ALLIGNORE = MASK_ALLIGNORE_;
160unsigned long mask_ATTRIBUTES = MASK_ATTRIBUTES_;
161unsigned long mask_LOGFILES = MASK_LOGFILES_;
162unsigned long mask_LOGGROW = MASK_LOGGROW_;
163unsigned long mask_READONLY = MASK_READONLY_;
164unsigned long mask_NOIGNORE = MASK_NOIGNORE_;
165
166
167extern char **environ;
168
169int sh_unix_maskreset()
170{
171 mask_PRELINK = MASK_PRELINK_;
172 mask_USER0 = MASK_USER_;
173 mask_USER1 = MASK_USER_;
174 mask_USER2 = MASK_USER_;
175 mask_USER3 = MASK_USER_;
176 mask_USER4 = MASK_USER_;
177 mask_ALLIGNORE = MASK_ALLIGNORE_;
178 mask_ATTRIBUTES = MASK_ATTRIBUTES_;
179 mask_LOGFILES = MASK_LOGFILES_;
180 mask_LOGGROW = MASK_LOGGROW_;
181 mask_READONLY = MASK_READONLY_;
182 mask_NOIGNORE = MASK_NOIGNORE_;
183 return 0;
184}
185
186
187#ifdef SYS_SIGLIST_DECLARED
188/* extern const char * const sys_siglist[]; */
189#else
190char * sh_unix_siglist (int signum)
191{
192 switch (signum)
193 {
194#ifdef SIGHUP
195 case SIGHUP:
196 return _("Hangup");
197#endif
198#ifdef SIGINT
199 case SIGINT:
200 return _("Interrupt");
201#endif
202#ifdef SIGQUIT
203 case SIGQUIT:
204 return _("Quit");
205#endif
206#ifdef SIGILL
207 case SIGILL:
208 return _("Illegal instruction");
209#endif
210#ifdef SIGTRAP
211 case SIGTRAP:
212 return _("Trace/breakpoint trap");
213#endif
214#ifdef SIGABRT
215 case SIGABRT:
216 return _("IOT trap/Abort");
217#endif
218#ifdef SIGBUS
219 case SIGBUS:
220 return _("Bus error");
221#endif
222#ifdef SIGFPE
223 case SIGFPE:
224 return _("Floating point exception");
225#endif
226#ifdef SIGUSR1
227 case SIGUSR1:
228 return _("User defined signal 1");
229#endif
230#ifdef SIGSEGV
231 case SIGSEGV:
232 return _("Segmentation fault");
233#endif
234#ifdef SIGUSR2
235 case SIGUSR2:
236 return _("User defined signal 2");
237#endif
238#ifdef SIGPIPE
239 case SIGPIPE:
240 return _("Broken pipe");
241#endif
242#ifdef SIGALRM
243 case SIGALRM:
244 return _("Alarm clock");
245#endif
246#ifdef SIGTERM
247 case SIGTERM:
248 return _("Terminated");
249#endif
250#ifdef SIGSTKFLT
251 case SIGSTKFLT:
252 return _("Stack fault");
253#endif
254#ifdef SIGCHLD
255 case SIGCHLD:
256 return _("Child exited");
257#endif
258#ifdef SIGCONT
259 case SIGCONT:
260 return _("Continued");
261#endif
262#ifdef SIGSTOP
263 case SIGSTOP:
264 return _("Stopped");
265#endif
266#ifdef SIGTSTP
267 case SIGTSTP:
268 return _("Stop typed at tty");
269#endif
270#ifdef SIGTTIN
271 case SIGTTIN:
272 return _("Stopped (tty input)");
273#endif
274#ifdef SIGTTOU
275 case SIGTTOU:
276 return _("Stopped (tty output)");
277#endif
278#ifdef SIGURG
279 case SIGURG:
280 return _("Urgent condition");
281#endif
282#ifdef SIGXCPU
283 case SIGXCPU:
284 return _("CPU time limit exceeded");
285#endif
286#ifdef SIGXFSZ
287 case SIGXFSZ:
288 return _("File size limit exceeded");
289#endif
290#ifdef SIGVTALRM
291 case SIGVTALRM:
292 return _("Virtual time alarm");
293#endif
294#ifdef SIGPROF
295 case SIGPROF:
296 return _("Profile signal");
297#endif
298#ifdef SIGWINCH
299 case SIGWINCH:
300 return _("Window size changed");
301#endif
302#ifdef SIGIO
303 case SIGIO:
304 return _("Possible I/O");
305#endif
306#ifdef SIGPWR
307 case SIGPWR:
308 return _("Power failure");
309#endif
310#ifdef SIGUNUSED
311 case SIGUNUSED:
312 return _("Unused signal");
313#endif
314 }
315 return _("Unknown");
316}
317#endif
318
319
320/* Log from within a signal handler without using any
321 * functions that are not async signal safe.
322 *
323 * This is the safe_itoa helper function.
324 */
325char * safe_itoa(int i, char * str, int size)
326{
327 unsigned int u;
328 int iisneg = 0;
329 char *p = &str[size-1];
330
331 *p = '\0';
332 if (i < 0) {
333 iisneg = 1;
334 u = ((unsigned int)(-(1+i))) + 1;
335 } else {
336 u = i;
337 }
338 do {
339 --p;
340 *p = '0' + (u % 10);
341 u /= 10;
342 } while (u && (p != str));
343 if ((iisneg == 1) && (p != str)) {
344 --p;
345 *p = '-';
346 }
347 return p;
348}
349
350/* Log from within a signal handler without using any
351 * functions that are not async signal safe.
352 *
353 * This is the safe_logger function.
354 * Arguments: signal (signal number), method (0=logger, 1=stderr), thepid (pid)
355 */
356extern int OnlyStderr;
357
358int safe_logger (int thesignal, int method, char * details)
359{
360 unsigned int i = 0;
361 int status = -1;
362 struct stat buf;
363 pid_t newpid;
364 char str[128];
365 char * p;
366
367 char l0[64], l1[64], l2[64], l3[64];
368 char a0[32], a1[32], a2[32];
369 char e0[128];
370 char msg[128];
371
372 char * locations[] = { NULL, NULL, NULL, NULL, NULL };
373 char * envp[] = { NULL, NULL };
374 char * argp[] = { NULL, NULL, NULL, NULL, NULL };
375
376 pid_t thepid = getpid();
377
378 if ((sh.flag.isdaemon == S_FALSE) || (OnlyStderr == S_TRUE))
379 method = 1;
380
381 /* seems that solaris cc needs this way of initializing ...
382 */
383 locations[0] = l0;
384 locations[1] = l1;
385 locations[2] = l2;
386 locations[3] = l3;
387
388 envp[0] = e0;
389
390 argp[0] = a0;
391 argp[1] = a1;
392 argp[2] = a2;
393
394 sl_strlcpy(msg, _("samhain["), 128);
395 p = safe_itoa((int) thepid, str, 128);
396 if (p && *p)
397 sl_strlcat(msg, p, 128);
398 if (thesignal == 0)
399 {
400 if (details == NULL) {
401 sl_strlcat(msg, _("]: out of memory"), 128);
402 } else {
403 sl_strlcat(msg, _("]: "), 128);
404 sl_strlcat(msg, details, 128);
405 }
406 }
407 else
408 {
409 sl_strlcat(msg, _("]: exit on signal "), 128);
410 p = safe_itoa(thesignal, str, 128);
411 if (p && *p)
412 sl_strlcat(msg, p, 128);
413 }
414
415 if (method == 1) {
416#ifndef STDERR_FILENO
417#define STDERR_FILENO 2
418#endif
419 int retval = 0;
420 do {
421 retval = write(STDERR_FILENO, msg, strlen(msg));
422 } while (retval < 0 && errno == EINTR);
423 do {
424 retval = write(STDERR_FILENO, "\n", 1);
425 } while (retval < 0 && errno == EINTR);
426 return 0;
427 }
428
429 sl_strlcpy (l0, _("/usr/bin/logger"), 64);
430 sl_strlcpy (l1, _("/usr/sbin/logger"), 64);
431 sl_strlcpy (l2, _("/usr/ucb/logger"), 64);
432 sl_strlcpy (l3, _("/bin/logger"), 64);
433
434 sl_strlcpy (a0, _("logger"), 32);
435 sl_strlcpy (a1, _("-p"), 32);
436 sl_strlcpy (a2, _("daemon.alert"), 32);
437
438 sl_strlcpy (e0,
439 _("PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/ucb:/usr/local/bin"),
440 128);
441
442 while (locations[i] != NULL) {
443 status = stat(locations[i], &buf);
444 if (status == 0)
445 break;
446 ++i;
447 }
448
449 if (locations[i] != NULL) {
450 argp[3] = msg;
451 newpid = fork();
452 if (newpid == 0) {
453 execve(locations[i], argp, envp);
454 _exit(1);
455 }
456 else if (newpid > 0) {
457 waitpid(newpid, &status, WUNTRACED);
458 }
459 }
460 return 0;
461}
462
463void safe_fatal (const char * details,
464 const char * file, int line)
465{
466 char msg[128];
467 char str[128];
468 char * p;
469 int thesignal = 0;
470 int method = 0;
471
472 p = safe_itoa((int) line, str, 128);
473 sl_strlcpy(msg, _("FATAL: "), 128);
474 sl_strlcat(msg, file, 128);
475 sl_strlcat(msg, ": ", 128);
476 if (p && (*p)) {
477 sl_strlcat(msg, p , 128);
478 sl_strlcat(msg, ": ", 128);
479 }
480 sl_strlcat(msg, details, 128);
481 (void) safe_logger (thesignal, method, msg);
482 _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")) { /* flawfinder: ignore */
2051 char * tz = sh_util_strdup(getenv("TZ")); /* flawfinder: ignore */
2052 size_t tzlen = strlen(tz);
2053 if (SL_TRUE == sl_ok_adds (4, tzlen)) {
2054 env[3] = SH_ALLOC(4+tzlen);
2055 sl_strlcpy(env[3], "TZ=", 4);
2056 sl_strlcat(env[3], tz , 4+tzlen);
2057 } else {
2058 env[3] = NULL;
2059 }
2060 } else {
2061 env[3] = NULL;
2062 }
2063 env[4] = NULL;
2064
2065 pid = fork();
2066
2067 if (pid == (pid_t)(-1))
2068 {
2069 return -1;
2070 }
2071
2072 else if (pid == 0) /* child */
2073 {
2074 memset(skey, 0, sizeof(sh_key_t));
2075 (void) umask(S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
2076 sh_unix_closeall (3, -1, SL_TRUE); /* in child process */
2077 execve(path, arg, env);
2078 _exit(EXIT_FAILURE);
2079 }
2080
2081 else /* parent */
2082 {
2083 int r;
2084
2085 while((r = waitpid(pid, &status, WUNTRACED)) != pid && r != -1) ;
2086
2087#if !defined(USE_UNO)
2088 if (r == -1 || !WIFEXITED(status))
2089 {
2090 status = -1;
2091 }
2092 else
2093 {
2094 status = WEXITSTATUS(status);
2095 }
2096#endif
2097 }
2098
2099 return status;
2100}
2101
2102/********************************************************
2103 *
2104 * TIME
2105 *
2106 ********************************************************/
2107
2108/* Figure out the time offset of the current timezone
2109 * in a portable way.
2110 */
2111char * t_zone(const time_t * xx)
2112{
2113 struct tm aa;
2114 struct tm bb;
2115 struct tm * cc;
2116 int sign = 0;
2117 int diff = 0;
2118 int hh, mm;
2119 static char tz[64];
2120
2121 SL_ENTER(_("t_zone"));
2122
2123#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2124 cc = gmtime_r (xx, &aa);
2125#else
2126 cc = gmtime (xx);
2127 memcpy (&aa, cc, sizeof(struct tm));
2128#endif
2129
2130#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2131 cc = localtime_r (xx, &bb);
2132#else
2133 cc = localtime (xx);
2134 memcpy (&bb, cc, sizeof(struct tm));
2135#endif
2136
2137 /* Check for datum wrap-around.
2138 */
2139 if (aa.tm_year < bb.tm_year)
2140 sign = (-1);
2141 else if (aa.tm_mon < bb.tm_mon)
2142 sign = (-1);
2143 else if (aa.tm_mday < bb.tm_mday)
2144 sign = (-1);
2145 else if (bb.tm_year < aa.tm_year)
2146 sign = ( 1);
2147 else if (bb.tm_mon < aa.tm_mon)
2148 sign = ( 1);
2149 else if (bb.tm_mday < aa.tm_mday)
2150 sign = ( 1);
2151
2152 diff = aa.tm_hour * 60 + aa.tm_min;
2153 diff = (bb.tm_hour * 60 + bb.tm_min) - diff;
2154 diff = diff - (sign * 24 * 60); /* datum wrap-around correction */
2155 hh = diff / 60;
2156 mm = diff - (hh * 60);
2157 sprintf (tz, _("%+03d%02d"), hh, mm); /* known to fit */
2158
2159 SL_RETURN(tz, _("t_zone"));
2160}
2161
2162unsigned long sh_unix_longtime ()
2163{
2164 return ((unsigned long)time(NULL));
2165}
2166
2167#ifdef HAVE_GETTIMEOFDAY
2168unsigned long sh_unix_notime ()
2169{
2170 struct timeval tv;
2171
2172 gettimeofday (&tv, NULL);
2173
2174 return ((unsigned long)(tv.tv_sec + tv.tv_usec * 10835 + getpid() + getppid()));
2175
2176}
2177#endif
2178
2179static int count_dev_time = 0;
2180
2181void reset_count_dev_time(void)
2182{
2183 count_dev_time = 0;
2184 return;
2185}
2186
2187int sh_unix_settimeserver (const char * address)
2188{
2189
2190 SL_ENTER(_("sh_unix_settimeserver"));
2191
2192 if (address != NULL && count_dev_time < 2
2193 && sl_strlen(address) < SH_PATHBUF)
2194 {
2195 if (count_dev_time == 0)
2196 sl_strlcpy (sh.srvtime.name, address, SH_PATHBUF);
2197 else
2198 sl_strlcpy (sh.srvtime.alt, address, SH_PATHBUF);
2199
2200 ++count_dev_time;
2201 SL_RETURN((0), _("sh_unix_settimeserver"));
2202 }
2203 SL_RETURN((-1), _("sh_unix_settimeserver"));
2204}
2205
2206
2207#ifdef HAVE_NTIME
2208#define UNIXEPOCH 2208988800UL /* difference between Unix time and net time
2209 * The UNIX EPOCH starts in 1970.
2210 */
2211#include <sys/socket.h>
2212#include <netinet/in.h>
2213#include <arpa/inet.h>
2214#include <netdb.h>
2215#include <ctype.h>
2216#endif
2217
2218/* Timeserver service. */
2219/* define is missing on HP-UX 10.20 */
2220#ifndef IPPORT_TIMESERVER
2221#define IPPORT_TIMESERVER 37
2222#endif
2223
2224char * sh_unix_time (time_t thetime, char * buffer, size_t len)
2225{
2226
2227 int status;
2228 char AsciiTime[81]; /* local time */
2229 time_t time_now;
2230 struct tm * time_ptr;
2231#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2232 struct tm time_tm;
2233#endif
2234#ifdef SH_USE_XML
2235 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2236#else
2237 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2238#endif
2239
2240#ifdef HAVE_NTIME
2241 int fd; /* network file descriptor */
2242 u_char net_time[4]; /* remote time in network format */
2243 static int failerr = 0; /* no net time */
2244 int fail = 0; /* no net time */
2245 int errflag;
2246 char errmsg[256];
2247 char error_call[SH_MINIBUF];
2248 int error_num;
2249#endif
2250
2251 SL_ENTER(_("sh_unix_time"));
2252
2253#ifdef HAVE_NTIME
2254 if (thetime == 0)
2255 {
2256 if (sh.srvtime.name[0] == '\0')
2257 {
2258 fail = 1;
2259 (void) time (&time_now);
2260 }
2261 else /* have a timeserver address */
2262 {
2263 fd = connect_port_2 (sh.srvtime.name, sh.srvtime.alt,
2264 IPPORT_TIMESERVER,
2265 error_call, &error_num, errmsg, sizeof(errmsg));
2266 if (fd >= 0)
2267 {
2268 if (4 != read_port (fd, (char *) net_time, 4, &errflag, 2))
2269 {
2270 fail = 1;
2271 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2272 MSG_E_NLOST,
2273 _("time"), sh.srvtime.name);
2274 }
2275 close(fd);
2276 }
2277 else
2278 {
2279 sh_error_handle ((-1), FIL__, __LINE__, error_num,
2280 MSG_E_NET, errmsg, error_call,
2281 _("time"), sh.srvtime.name);
2282 fail = 1;
2283 }
2284
2285 if (fail == 0)
2286 {
2287 time_now = ntohl(* (long *) net_time) - UNIXEPOCH;
2288 /* fprintf(stderr, "TIME IS %ld\n", time_now); */
2289 if (failerr == 1) {
2290 failerr = 0;
2291 sh_error_handle ((-1), FIL__, __LINE__, 0,
2292 MSG_E_NEST,
2293 _("time"), sh.srvtime.name);
2294 }
2295 }
2296 else
2297 {
2298 (void) time (&time_now);
2299 if (failerr == 0)
2300 {
2301 failerr = 1;
2302 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2303 MSG_SRV_FAIL,
2304 _("time"), sh.srvtime.name);
2305 }
2306 }
2307 }
2308 }
2309 else
2310 {
2311 time_now = thetime;
2312 }
2313
2314 /* #ifdef HAVE_NTIME */
2315#else
2316
2317 if (thetime == 0)
2318 {
2319 (void) time (&time_now);
2320 }
2321 else
2322 {
2323 time_now = thetime;
2324 }
2325
2326 /* #ifdef HAVE_NTIME */
2327#endif
2328
2329 if (time_now == (-1) )
2330 {
2331 sl_strlcpy(buffer, _(deftime), len);
2332 SL_RETURN(buffer, _("sh_unix_time"));
2333 }
2334 else
2335 {
2336#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2337 time_ptr = localtime_r (&time_now, &time_tm);
2338#else
2339 time_ptr = localtime (&time_now);
2340#endif
2341 }
2342 if (time_ptr != NULL)
2343 {
2344 status = strftime (AsciiTime, sizeof(AsciiTime),
2345#ifdef SH_USE_XML
2346 _("%Y-%m-%dT%H:%M:%S%%s"),
2347#else
2348 _("[%Y-%m-%dT%H:%M:%S%%s]"),
2349#endif
2350 time_ptr);
2351
2352 sl_snprintf(buffer, len, AsciiTime, t_zone(&time_now));
2353
2354 if ( (status == 0) || (status == sizeof(AsciiTime)) )
2355 {
2356 sl_strlcpy(buffer, _(deftime), len);
2357 SL_RETURN( buffer, _("sh_unix_time"));
2358 }
2359 else
2360 {
2361 SL_RETURN(buffer, _("sh_unix_time"));
2362 }
2363 }
2364
2365 /* last resort
2366 */
2367 sl_strlcpy(buffer, _(deftime), len);
2368 SL_RETURN( buffer, _("sh_unix_time"));
2369}
2370
2371static int sh_unix_use_localtime = S_FALSE;
2372
2373/* whether to use localtime for file timesatams in logs
2374 */
2375int sh_unix_uselocaltime (const char * c)
2376{
2377 int i;
2378 SL_ENTER(_("sh_unix_uselocaltime"));
2379 i = sh_util_flagval(c, &(sh_unix_use_localtime));
2380
2381 SL_RETURN(i, _("sh_unix_uselocaltime"));
2382}
2383
2384char * sh_unix_gmttime (time_t thetime, char * buffer, size_t len)
2385{
2386
2387 int status;
2388
2389 struct tm * time_ptr;
2390#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS)
2391 struct tm time_tm;
2392#endif
2393 char AsciiTime[81]; /* GMT time */
2394#ifdef SH_USE_XML
2395 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2396#else
2397 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2398#endif
2399
2400 SL_ENTER(_("sh_unix_gmttime"));
2401
2402 if (sh_unix_use_localtime == S_FALSE)
2403 {
2404#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2405 time_ptr = gmtime_r (&thetime, &time_tm);
2406#else
2407 time_ptr = gmtime (&thetime);
2408#endif
2409 }
2410 else
2411 {
2412#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2413 time_ptr = localtime_r (&thetime, &time_tm);
2414#else
2415 time_ptr = localtime (&thetime);
2416#endif
2417 }
2418 if (time_ptr != NULL)
2419 {
2420 status = strftime (AsciiTime, 80,
2421#ifdef SH_USE_XML
2422 _("%Y-%m-%dT%H:%M:%S"),
2423#else
2424 _("[%Y-%m-%dT%H:%M:%S]"),
2425#endif
2426 time_ptr);
2427
2428 if ( (status == 0) || (status == 80) )
2429 sl_strlcpy(buffer, _(deftime), len);
2430 else
2431 sl_strlcpy(buffer, AsciiTime, len);
2432 SL_RETURN( buffer, _("sh_unix_gmttime"));
2433 }
2434
2435 /* last resort
2436 */
2437 sl_strlcpy(buffer, _(deftime), len);
2438 SL_RETURN( buffer, _("sh_unix_gmttime"));
2439}
2440
2441
2442char * sh_unix_getUIDdir (int level, uid_t uid, char * out, size_t len)
2443{
2444 struct passwd * tempres;
2445 int status = 0;
2446#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2447 struct passwd pwd;
2448 char buffer[SH_PWBUF_SIZE];
2449#endif
2450 char errbuf[SH_ERRBUF_SIZE];
2451
2452 SL_ENTER(_("sh_unix_getUIDdir"));
2453
2454#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2455 sh_getpwuid_r(uid, &pwd, buffer, sizeof(buffer), &tempres);
2456#else
2457 errno = 0;
2458 tempres = sh_getpwuid(uid);
2459 status = errno;
2460#endif
2461
2462 if (tempres == NULL) {
2463 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2464 sh_error_message(status, errbuf, sizeof(errbuf)),
2465 _("getpwuid"), (long) uid, _("completely missing"));
2466 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2467 }
2468
2469 if (tempres->pw_dir != NULL) {
2470 sl_strlcpy(out, tempres->pw_dir, len);
2471 SL_RETURN( out, _("sh_unix_getUIDdir"));
2472 } else {
2473 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2474 sh_error_message(status, errbuf, sizeof(errbuf)),
2475 _("getpwuid"), (long) uid, _("pw_dir"));
2476 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2477 }
2478}
2479
2480SH_MUTEX_STATIC(mutex_getUIDname, PTHREAD_MUTEX_INITIALIZER);
2481
2482char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len)
2483{
2484 struct passwd * tempres;
2485#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2486 struct passwd pwd;
2487 char buffer[SH_PWBUF_SIZE];
2488#endif
2489 int status = 0;
2490 static uid_t old_uid;
2491 static char name[32] = { '\0' };
2492 char errbuf[SH_ERRBUF_SIZE];
2493
2494 SL_ENTER(_("sh_unix_getUIDname"));
2495
2496 if ((uid == old_uid) && (name[0] != '\0')) {
2497 out[0] = '\0';
2498 SH_MUTEX_LOCK_UNSAFE(mutex_getUIDname);
2499 if ((uid == old_uid) && (name[0] != '\0')) {
2500 sl_strlcpy(out, name, len);
2501 }
2502 SH_MUTEX_UNLOCK_UNSAFE(mutex_getUIDname);
2503 if (out[0] != '\0')
2504 SL_RETURN( out, _("sh_unix_getUIDname"));
2505 }
2506
2507#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2508 sh_getpwuid_r(uid, &pwd, buffer, sizeof(buffer), &tempres);
2509#else
2510 errno = 0;
2511 tempres = sh_getpwuid(uid);
2512 status = errno;
2513#endif
2514
2515 if (tempres == NULL) {
2516 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2517 sh_error_message(status, errbuf, sizeof(errbuf)),
2518 _("getpwuid"), (long) uid, _("completely missing"));
2519 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2520 }
2521
2522
2523 if (tempres->pw_name != NULL) {
2524 SH_MUTEX_LOCK_UNSAFE(mutex_getUIDname);
2525 sl_strlcpy(name, tempres->pw_name, sizeof(name));
2526 old_uid = uid;
2527 sl_strlcpy(out, name, len);
2528 SH_MUTEX_UNLOCK_UNSAFE(mutex_getUIDname);
2529 SL_RETURN( out, _("sh_unix_getUIDname"));
2530 } else {
2531 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2532 sh_error_message(status, errbuf, sizeof(errbuf)),
2533 _("getpwuid"), (long) uid, _("pw_user"));
2534 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2535 }
2536}
2537
2538SH_MUTEX_STATIC(mutex_getGIDname, PTHREAD_MUTEX_INITIALIZER);
2539
2540char * sh_unix_getGIDname (int level, gid_t gid, char * out, size_t len)
2541{
2542 struct group * tempres;
2543 int status = 0;
2544 static gid_t old_gid;
2545 static char name[32] = { '\0' };
2546#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2547 struct group grp;
2548 char buffer[SH_GRBUF_SIZE];
2549#endif
2550 char errbuf[SH_ERRBUF_SIZE];
2551
2552
2553 SL_ENTER(_("sh_unix_getGIDname"));
2554
2555 if ((gid == old_gid) && (name[0] != '\0')) {
2556 out[0] = '\0';
2557 SH_MUTEX_LOCK_UNSAFE(mutex_getGIDname);
2558 if ((gid == old_gid) && (name[0] != '\0')) {
2559 sl_strlcpy(out, name, len);
2560 }
2561 SH_MUTEX_UNLOCK_UNSAFE(mutex_getGIDname);
2562 if (out[0] != '\0')
2563 SL_RETURN( out, _("sh_unix_getGIDname"));
2564 }
2565
2566#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2567 status = sh_getgrgid_r(gid, &grp, buffer, sizeof(buffer), &tempres);
2568#else
2569 errno = 0;
2570 tempres = sh_getgrgid(gid);
2571 status = errno;
2572#endif
2573
2574 if (tempres == NULL) {
2575 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2576 sh_error_message(status, errbuf, sizeof(errbuf)),
2577 _("getgrgid"), (long) gid, _("completely missing"));
2578
2579 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2580 }
2581
2582 if (tempres->gr_name != NULL) {
2583 SH_MUTEX_LOCK_UNSAFE(mutex_getGIDname);
2584 sl_strlcpy(name, tempres->gr_name, sizeof(name));
2585 old_gid = gid;
2586 sl_strlcpy(out, name, len);
2587 SH_MUTEX_UNLOCK_UNSAFE(mutex_getGIDname);
2588 SL_RETURN( out, _("sh_unix_getGIDname"));
2589 } else {
2590 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2591 sh_error_message(status, errbuf, sizeof(errbuf)),
2592 _("getgrgid"), (long) gid, _("gr_name"));
2593 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2594 }
2595}
2596
2597int sh_unix_getUser ()
2598{
2599 char * p;
2600 uid_t seuid, sruid;
2601 char user[USER_MAX];
2602 char dir[SH_PATHBUF];
2603
2604 SL_ENTER(_("sh_unix_getUser"));
2605
2606 seuid = geteuid();
2607
2608 sh.effective.uid = seuid;
2609
2610 p = sh_unix_getUIDdir (SH_ERR_ERR, seuid, dir, sizeof(dir));
2611
2612 if (p == NULL)
2613 SL_RETURN((-1), _("sh_unix_getUser"));
2614 else
2615 {
2616 if (sl_strlen(p) >= SH_PATHBUF) {
2617 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2618 _("getpwuid"), (long) seuid, _("pw_home"));
2619 SL_RETURN((-1), _("sh_unix_getUser"));
2620 } else {
2621 sl_strlcpy ( sh.effective.home, p, SH_PATHBUF);
2622 }
2623 }
2624
2625 sruid = getuid();
2626
2627 sh.real.uid = sruid;
2628
2629 p = sh_unix_getUIDname (SH_ERR_ERR, sruid, user, sizeof(user));
2630 if (p == NULL)
2631 SL_RETURN((-1), _("sh_unix_getUser"));
2632 else
2633 {
2634 if (sl_strlen(p) >= USER_MAX) {
2635 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2636 _("getpwuid"), (long) sruid, _("pw_user"));
2637 SL_RETURN((-1), _("sh_unix_getUser"));
2638 } else {
2639 sl_strlcpy ( sh.real.user, p, USER_MAX);
2640 }
2641 }
2642
2643 p = sh_unix_getUIDdir (SH_ERR_ERR, sruid, dir, sizeof(dir));
2644
2645 if (p == NULL)
2646 SL_RETURN((-1), _("sh_unix_getUser"));
2647 else
2648 {
2649 if (sl_strlen(p) >= SH_PATHBUF) {
2650 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2651 _("getpwuid"), (long) sruid, _("pw_home"));
2652 SL_RETURN((-1), _("sh_unix_getUser"));
2653 } else {
2654 sl_strlcpy ( sh.real.home, p, SH_PATHBUF);
2655 }
2656 }
2657
2658 SL_RETURN((0), _("sh_unix_getUser"));
2659
2660 /* notreached */
2661}
2662
2663
2664int sh_unix_getline (SL_TICKET fd, char * line, int sizeofline)
2665{
2666 register int count;
2667 register int n = 0;
2668 char c;
2669
2670 SL_ENTER(_("sh_unix_getline"));
2671
2672 if (sizeofline < 2) {
2673 line[0] = '\0';
2674 SL_RETURN((0), _("sh_unix_getline"));
2675 }
2676
2677 --sizeofline;
2678
2679 while (n < sizeofline) {
2680
2681 count = sl_read (fd, &c, 1);
2682
2683 /* end of file
2684 */
2685 if (count < 1) {
2686 line[n] = '\0';
2687 n = -1;
2688 break;
2689 }
2690
2691 if (/* c != '\0' && */ c != '\n') {
2692 line[n] = c;
2693 ++n;
2694 } else if (c == '\n') {
2695 if (n > 0) {
2696 line[n] = '\0';
2697 break;
2698 } else {
2699 line[n] = '\n'; /* get newline only if only char on line */
2700 ++n;
2701 line[n] = '\0';
2702 break;
2703 }
2704 } else {
2705 line[n] = '\0';
2706 break;
2707 }
2708
2709 }
2710
2711
2712 line[sizeofline] = '\0'; /* make sure line is terminated */
2713 SL_RETURN((n), _("sh_unix_getline"));
2714}
2715
2716
2717#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
2718
2719/**************************************************************
2720 *
2721 * --- FILE INFO ---
2722 *
2723 **************************************************************/
2724
2725#if (defined(__linux__) && (defined(HAVE_LINUX_EXT2_FS_H) || defined(HAVE_EXT2FS_EXT2_FS_H))) || defined(HAVE_STAT_FLAGS)
2726
2727#if defined(__linux__)
2728
2729/* --- Determine ext2fs file attributes. ---
2730 */
2731#include <sys/ioctl.h>
2732#if defined(HAVE_EXT2FS_EXT2_FS_H)
2733#include <ext2fs/ext2_fs.h>
2734#else
2735#include <linux/ext2_fs.h>
2736#endif
2737
2738/* __linux__ includes */
2739#endif
2740
2741static
2742int sh_unix_getinfo_attr (char * name,
2743 unsigned long * flags,
2744 char * c_attr,
2745 int fd, struct stat * buf)
2746{
2747
2748/* TAKEN FROM:
2749 *
2750 * lsattr.c - List file attributes on an ext2 file system
2751 *
2752 * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
2753 * Laboratoire MASI, Institut Blaise Pascal
2754 * Universite Pierre et Marie Curie (Paris VI)
2755 *
2756 * This file can be redistributed under the terms of the GNU General
2757 * Public License
2758 */
2759
2760#ifdef HAVE_STAT_FLAGS
2761
2762 SL_ENTER(_("sh_unix_getinfo_attr"));
2763
2764 *flags = 0;
2765
2766 /* cast to void to avoid compiler warning about unused parameters */
2767 (void) fd;
2768 (void) name;
2769
2770#ifdef UF_NODUMP
2771 if (buf->st_flags & UF_NODUMP) {
2772 *flags |= UF_NODUMP;
2773 c_attr[0] = 'd';
2774 }
2775#endif
2776#ifdef UF_IMMUTABLE
2777 if (buf->st_flags & UF_IMMUTABLE) {
2778 *flags |= UF_IMMUTABLE;
2779 c_attr[1] = 'i';
2780 }
2781#endif
2782#ifdef UF_APPEND
2783 if (buf->st_flags & UF_APPEND) {
2784 *flags |= UF_APPEND;
2785 c_attr[2] = 'a';
2786 }
2787#endif
2788#ifdef UF_NOUNLINK
2789 if (buf->st_flags & UF_NOUNLINK) {
2790 *flags |= UF_NOUNLINK;
2791 c_attr[3] = 'u';
2792 }
2793#endif
2794#ifdef UF_OPAQUE
2795 if (buf->st_flags & UF_OPAQUE) {
2796 *flags |= UF_OPAQUE;
2797 c_attr[4] = 'o';
2798 }
2799#endif
2800#ifdef SF_ARCHIVED
2801 if (buf->st_flags & SF_ARCHIVED) {
2802 *flags |= SF_ARCHIVED;
2803 c_attr[5] = 'R';
2804 }
2805
2806#endif
2807#ifdef SF_IMMUTABLE
2808 if (buf->st_flags & SF_IMMUTABLE) {
2809 *flags |= SF_IMMUTABLE;
2810 c_attr[6] = 'I';
2811 }
2812#endif
2813#ifdef SF_APPEND
2814 if (buf->st_flags & SF_APPEND) {
2815 *flags |= SF_APPEND;
2816 c_attr[7] = 'A';
2817 }
2818#endif
2819#ifdef SF_NOUNLINK
2820 if (buf->st_flags & SF_NOUNLINK) {
2821 *flags |= SF_NOUNLINK;
2822 c_attr[8] = 'U';
2823 }
2824#endif
2825
2826 /* ! HAVE_STAT_FLAGS */
2827#else
2828
2829#ifdef HAVE_EXT2_IOCTLS
2830 int /* fd, */ r, f;
2831
2832 SL_ENTER(_("sh_unix_getinfo_attr"));
2833
2834 *flags = 0;
2835 (void) buf;
2836
2837 /* open() -> aud_open() R.Wichmann
2838 fd = aud_open (FIL__, __LINE__, SL_YESPRIV, name, O_RDONLY|O_NONBLOCK, 0);
2839 */
2840
2841 if (fd == -1 || name == NULL)
2842 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
2843
2844
2845 r = ioctl (fd, EXT2_IOC_GETFLAGS, &f);
2846 /* close (fd); */
2847
2848 if (r == -1)
2849 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
2850
2851 if (f == 0)
2852 SL_RETURN(0, _("sh_unix_getinfo_attr"));
2853
2854 *flags = f;
2855
2856/* ! HAVE_EXT2_IOCTLS */
2857#else
2858
2859 SL_ENTER(_("sh_unix_getinfo_attr"));
2860
2861 *flags = 0; /* modified by R.Wichmann */
2862
2863/* ! HAVE_EXT2_IOCTLS */
2864#endif
2865/*
2866 * END
2867 *
2868 * lsattr.c - List file attributes on an ext2 file system
2869 */
2870
2871 if (*flags == 0)
2872 goto theend;
2873
2874#ifdef EXT2_SECRM_FL
2875 if ( (*flags & EXT2_SECRM_FL) != 0 ) c_attr[0] = 's';
2876#endif
2877#ifdef EXT2_UNRM_FL
2878 if ( (*flags & EXT2_UNRM_FL) != 0 ) c_attr[1] = 'u';
2879#endif
2880#ifdef EXT2_SYNC_FL
2881 if ( (*flags & EXT2_SYNC_FL) != 0 ) c_attr[2] = 'S';
2882#endif
2883#ifdef EXT2_IMMUTABLE_FL
2884 if ( (*flags & EXT2_IMMUTABLE_FL) != 0) c_attr[3] = 'i';
2885#endif
2886#ifdef EXT2_APPEND_FL
2887 if ( (*flags & EXT2_APPEND_FL) != 0 ) c_attr[4] = 'a';
2888#endif
2889#ifdef EXT2_NODUMP_FL
2890 if ( (*flags & EXT2_NODUMP_FL) != 0 ) c_attr[5] = 'd';
2891#endif
2892#ifdef EXT2_NOATIME_FL
2893 if ( (*flags & EXT2_NOATIME_FL) != 0) c_attr[6] = 'A';
2894#endif
2895#ifdef EXT2_COMPR_FL
2896 if ( (*flags & EXT2_COMPR_FL) != 0 ) c_attr[7] = 'c';
2897#endif
2898
2899#ifdef EXT2_TOPDIR_FL
2900 if ( (*flags & EXT2_TOPDIR_FL) != 0 ) c_attr[8] = 'T';
2901#endif
2902#ifdef EXT2_DIRSYNC_FL
2903 if ( (*flags & EXT2_DIRSYNC_FL) != 0 ) c_attr[9] = 'D';
2904#endif
2905#ifdef EXT2_NOTAIL_FL
2906 if ( (*flags & EXT2_NOTAIL_FL) != 0 ) c_attr[10] = 't';
2907#endif
2908#ifdef EXT2_JOURNAL_DATA_FL
2909 if ( (*flags & EXT2_JOURNAL_DATA_FL) != 0) c_attr[11] = 'j';
2910#endif
2911
2912 theend:
2913 /* ext2 */
2914#endif
2915
2916 c_attr[12] = '\0';
2917
2918 SL_RETURN(0, _("sh_unix_getinfo_attr"));
2919}
2920#else
2921static
2922int sh_unix_getinfo_attr (char * name,
2923 unsigned long * flags,
2924 char * c_attr,
2925 int fd, struct stat * buf)
2926{
2927 return 0;
2928}
2929
2930/* defined(__linux__) || defined(HAVE_STAT_FLAGS) */
2931#endif
2932
2933/* determine file type
2934 */
2935static
2936int sh_unix_getinfo_type (struct stat * buf,
2937 ShFileType * type,
2938 char * c_mode)
2939{
2940 SL_ENTER(_("sh_unix_getinfo_type"));
2941
2942 if ( S_ISREG(buf->st_mode) ) {
2943 (*type) = SH_FILE_REGULAR;
2944 c_mode[0] = '-';
2945 }
2946 else if ( S_ISLNK(buf->st_mode) ) {
2947 (*type) = SH_FILE_SYMLINK;
2948 c_mode[0] = 'l';
2949 }
2950 else if ( S_ISDIR(buf->st_mode) ) {
2951 (*type) = SH_FILE_DIRECTORY;
2952 c_mode[0] = 'd';
2953 }
2954 else if ( S_ISCHR(buf->st_mode) ) {
2955 (*type) = SH_FILE_CDEV;
2956 c_mode[0] = 'c';
2957 }
2958 else if ( S_ISBLK(buf->st_mode) ) {
2959 (*type) = SH_FILE_BDEV;
2960 c_mode[0] = 'b';
2961 }
2962 else if ( S_ISFIFO(buf->st_mode) ) {
2963 (*type) = SH_FILE_FIFO;
2964 c_mode[0] = '|';
2965 }
2966 else if ( S_ISSOCK(buf->st_mode) ) {
2967 (*type) = SH_FILE_SOCKET;
2968 c_mode[0] = 's';
2969 }
2970 else if ( S_ISDOOR(buf->st_mode) ) {
2971 (*type) = SH_FILE_DOOR;
2972 c_mode[0] = 'D';
2973 }
2974 else if ( S_ISPORT(buf->st_mode) ) {
2975 (*type) = SH_FILE_PORT;
2976 c_mode[0] = 'P';
2977 }
2978 else {
2979 (*type) = SH_FILE_UNKNOWN;
2980 c_mode[0] = '?';
2981 }
2982
2983 SL_RETURN(0, _("sh_unix_getinfo_type"));
2984}
2985
2986int sh_unix_get_ftype(char * fullpath)
2987{
2988 char c_mode[CMODE_SIZE];
2989 struct stat buf;
2990 ShFileType type;
2991 int res;
2992
2993 SL_ENTER(_("sh_unix_get_ftype"));
2994
2995 res = retry_lstat(FIL__, __LINE__, fullpath, &buf);
2996
2997 if (res < 0)
2998 SL_RETURN(SH_FILE_UNKNOWN, _("sh_unix_getinfo_type"));
2999
3000 sh_unix_getinfo_type (&buf, &type, c_mode);
3001
3002 SL_RETURN(type, _("sh_unix_get_ftype"));
3003}
3004
3005
3006static
3007int sh_unix_getinfo_mode (struct stat *buf,
3008 unsigned int * mode,
3009 char * c_mode)
3010{
3011
3012 SL_ENTER(_("sh_unix_getinfo_mode"));
3013
3014 (*mode) = buf->st_mode;
3015
3016 /* make 'ls'-like string */
3017
3018 if ( (buf->st_mode & S_IRUSR) != 0 ) c_mode[1] = 'r';
3019 if ( (buf->st_mode & S_IWUSR) != 0 ) c_mode[2] = 'w';
3020 if ( (buf->st_mode & S_IXUSR) != 0 ) {
3021 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 's';
3022 else c_mode[3] = 'x';
3023 } else {
3024 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 'S';
3025 }
3026
3027 if ( (buf->st_mode & S_IRGRP) != 0 ) c_mode[4] = 'r';
3028 if ( (buf->st_mode & S_IWGRP) != 0 ) c_mode[5] = 'w';
3029 if ( (buf->st_mode & S_IXGRP) != 0 ) {
3030 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 's';
3031 else c_mode[6] = 'x';
3032 } else {
3033 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 'S';
3034 }
3035
3036 if ( (buf->st_mode & S_IROTH) != 0 ) c_mode[7] = 'r';
3037 if ( (buf->st_mode & S_IWOTH) != 0 ) c_mode[8] = 'w';
3038#ifdef S_ISVTX /* not POSIX */
3039 if ( (buf->st_mode & S_IXOTH) != 0 ) {
3040 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 't';
3041 else c_mode[9] = 'x';
3042 } else {
3043 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 'T';
3044 }
3045#else
3046 if ( (buf->st_mode & S_IXOTH) != 0 ) c_mode[9] = 'x';
3047#endif
3048
3049 SL_RETURN(0, _("sh_unix_getinfo_mode"));
3050}
3051
3052
3053long IO_Limit = 0;
3054
3055void sh_unix_io_pause ()
3056{
3057 long runtime;
3058 float someval;
3059 unsigned long sometime;
3060
3061 if (IO_Limit == 0)
3062 {
3063 return;
3064 }
3065 else
3066 {
3067 runtime = (long) (time(NULL) - sh.statistics.time_start);
3068
3069 if (runtime > 0 && (long)(sh.statistics.bytes_hashed/runtime) > IO_Limit)
3070 {
3071 someval = sh.statistics.bytes_hashed - (IO_Limit * runtime);
3072 someval /= (float) IO_Limit;
3073 if (someval < 1.0)
3074 {
3075 someval *= 1000; /* milliseconds in a second */
3076 sometime = (unsigned long) someval;
3077 retry_msleep(0, sometime);
3078 }
3079 else
3080 {
3081 sometime = (unsigned long) someval;
3082 retry_msleep (sometime, 0);
3083 }
3084 }
3085 }
3086 return;
3087}
3088
3089int sh_unix_set_io_limit (const char * c)
3090{
3091 long val;
3092
3093 SL_ENTER(_("sh_unix_set_io_limit"));
3094
3095 val = strtol (c, (char **)NULL, 10);
3096 if (val < 0)
3097 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
3098 _("set I/O limit"), c);
3099
3100 val = (val < 0 ? 0 : val);
3101
3102 IO_Limit = val * 1024;
3103 SL_RETURN( 0, _("sh_unix_set_io_limit"));
3104}
3105
3106/* obtain file info
3107 */
3108extern int flag_err_debug;
3109
3110#include "sh_ignore.h"
3111
3112int sh_unix_checksum_size (char * filename, struct stat * fbuf,
3113 char * fileHash, int alert_timeout, SL_TICKET fd)
3114{
3115 file_type tmpFile;
3116 int status;
3117
3118 SL_ENTER(_("sh_unix_checksum_size"));
3119
3120 tmpFile.link_path = NULL;
3121
3122 if (sh.flag.checkSum != SH_CHECK_INIT)
3123 {
3124 /* lookup file in database */
3125 status = sh_hash_get_it (filename, &tmpFile);
3126 if (status != 0) {
3127 goto out;
3128 }
3129 }
3130 else
3131 {
3132 tmpFile.size = fbuf->st_size;
3133 }
3134
3135 /* if last < current get checksum */
3136 if (tmpFile.size < fbuf->st_size)
3137 {
3138 char hashbuf[KEYBUF_SIZE];
3139 UINT64 local_length = (UINT64) (tmpFile.size < 0 ? 0 : tmpFile.size);
3140 sl_strlcpy(fileHash,
3141 sh_tiger_generic_hash (filename, fd, &(local_length),
3142 alert_timeout, hashbuf, sizeof(hashbuf)),
3143 KEY_LEN+1);
3144
3145 /* return */
3146 if (tmpFile.link_path) SH_FREE(tmpFile.link_path);
3147 SL_RETURN( 0, _("sh_unix_checksum_size"));
3148 }
3149
3150 out:
3151 if (tmpFile.link_path) SH_FREE(tmpFile.link_path);
3152 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3153 SL_RETURN( -1, _("sh_unix_checksum_size"));
3154}
3155
3156int sh_unix_check_selinux = S_FALSE;
3157int sh_unix_check_acl = S_FALSE;
3158
3159#ifdef USE_ACL
3160
3161#include <sys/acl.h>
3162static char * sh_unix_getinfo_acl (char * path, int fd, struct stat * buf)
3163{
3164 /* system.posix_acl_access, system.posix_acl_default
3165 */
3166 char * out = NULL;
3167 char * collect = NULL;
3168 char * tmp;
3169 char * out_compact;
3170 ssize_t len;
3171 acl_t result;
3172
3173 SL_ENTER(_("sh_unix_getinfo_acl"));
3174
3175 result = (fd == -1) ?
3176 acl_get_file (path, ACL_TYPE_ACCESS) :
3177 acl_get_fd (fd);
3178
3179 if (result)
3180 {
3181 out = acl_to_text (result, &len);
3182 if (out && (len > 0)) {
3183 out_compact = sh_util_acl_compact (out, len);
3184 acl_free(out);
3185 if (out_compact)
3186 {
3187 collect = sh_util_strconcat (_("acl_access:"), out_compact, NULL);
3188 SH_FREE(out_compact);
3189 }
3190 }
3191 acl_free(result);
3192 }
3193
3194
3195 if ( S_ISDIR(buf->st_mode) )
3196 {
3197 result = acl_get_file (path, ACL_TYPE_DEFAULT);
3198
3199 if (result)
3200 {
3201 out = acl_to_text (result, &len);
3202 if (out && (len > 0)) {
3203 out_compact = sh_util_acl_compact (out, len);
3204 acl_free(out);
3205 if (out_compact) {
3206 if (collect) {
3207 tmp = sh_util_strconcat (_("acl_default:"),
3208 out_compact, ":", collect, NULL);
3209 SH_FREE(collect);
3210 }
3211 else {
3212 tmp = sh_util_strconcat (_("acl_default:"), out_compact, NULL);
3213 }
3214 SH_FREE(out_compact);
3215 collect = tmp;
3216 }
3217 }
3218 acl_free(result);
3219 }
3220 }
3221
3222 SL_RETURN((collect),_("sh_unix_getinfo_acl"));
3223}
3224#endif
3225
3226#ifdef USE_XATTR
3227
3228#include <attr/xattr.h>
3229static char * sh_unix_getinfo_xattr_int (char * path, int fd, char * name)
3230{
3231 char * out = NULL;
3232 char * tmp = NULL;
3233 size_t size = 256;
3234 ssize_t result;
3235
3236 SL_ENTER(_("sh_unix_getinfo_xattr_int"));
3237
3238 out = SH_ALLOC(size);
3239
3240 result = (fd == -1) ?
3241 lgetxattr (path, name, out, size-1) :
3242 fgetxattr (fd, name, out, size-1);
3243
3244 if (result == -1 && errno == ERANGE)
3245 {
3246 SH_FREE(out);
3247 result = (fd == -1) ?
3248 lgetxattr (path, name, NULL, 0) :
3249 fgetxattr (fd, name, NULL, 0);
3250 size = result + 1;
3251 out = SH_ALLOC(size);
3252 result = (fd == -1) ?
3253 lgetxattr (path, name, out, size-1) :
3254 fgetxattr (fd, name, out, size-1);
3255 }
3256
3257 if ((result > 0) && ((size_t)result < size))
3258 {
3259 out[size-1] = '\0';
3260 tmp = out;
3261 }
3262 else
3263 {
3264 SH_FREE(out);
3265 }
3266
3267 SL_RETURN((tmp),_("sh_unix_getinfo_xattr_int"));
3268}
3269
3270
3271static char * sh_unix_getinfo_xattr (char * path, int fd, struct stat * buf)
3272{
3273 /* system.posix_acl_access, system.posix_acl_default, security.selinux
3274 */
3275 char * tmp;
3276 char * out = NULL;
3277 char * collect = NULL;
3278
3279 SL_ENTER(_("sh_unix_getinfo_xattr"));
3280
3281#ifdef USE_ACL
3282 /*
3283 * we need the acl_get_fd/acl_get_file functions, getxattr will only
3284 * yield the raw bytes
3285 */
3286 if (sh_unix_check_acl == S_TRUE)
3287 {
3288 out = sh_unix_getinfo_acl(path, fd, buf);
3289
3290 if (out)
3291 {
3292 collect = out;
3293 }
3294 }
3295#endif
3296
3297 if (sh_unix_check_selinux == S_TRUE)
3298 {
3299 out = sh_unix_getinfo_xattr_int(path, fd, _("security.selinux"));
3300
3301 if (out)
3302 {
3303 if (collect) {
3304 tmp = sh_util_strconcat(_("selinux:"), out, ":", collect, NULL);
3305 SH_FREE(collect);
3306 }
3307 else {
3308 tmp = sh_util_strconcat(_("selinux:"), out, NULL);
3309 }
3310 SH_FREE(out);
3311 collect = tmp;
3312 }
3313 }
3314
3315 SL_RETURN((collect),_("sh_unix_getinfo_xattr"));
3316}
3317#endif
3318
3319#ifdef USE_XATTR
3320int sh_unix_setcheckselinux (const char * c)
3321{
3322 int i;
3323 SL_ENTER(_("sh_unix_setcheckselinux"));
3324 i = sh_util_flagval(c, &(sh_unix_check_selinux));
3325
3326 SL_RETURN(i, _("sh_unix_setcheckselinux"));
3327}
3328#endif
3329
3330#ifdef USE_ACL
3331int sh_unix_setcheckacl (const char * c)
3332{
3333 int i;
3334 SL_ENTER(_("sh_unix_setcheckacl"));
3335 i = sh_util_flagval(c, &(sh_unix_check_acl));
3336
3337 SL_RETURN(i, _("sh_unix_setcheckacl"));
3338}
3339#endif
3340
3341#ifdef HAVE_LIBZ
3342#include <zlib.h>
3343#endif
3344
3345int sh_unix_getinfo (int level, char * filename, file_type * theFile,
3346 char * fileHash, int policy)
3347{
3348 char timestr[81];
3349 long runtim;
3350 struct stat buf;
3351 struct stat lbuf;
3352 struct stat fbuf;
3353 int stat_return;
3354 int stat_errno = 0;
3355
3356 ShFileType type;
3357 unsigned int mode;
3358 char * tmp;
3359 char * tmp2;
3360
3361 char * linknamebuf;
3362 int linksize;
3363
3364 extern int get_the_fd (SL_TICKET ticket);
3365
3366 SL_TICKET rval_open;
3367 int err_open = 0;
3368
3369 int fd;
3370 int fstat_return;
3371 int fstat_errno = 0;
3372
3373 sh_string * content = NULL;
3374
3375 time_t tend;
3376 time_t tstart;
3377
3378
3379 char * path = NULL;
3380
3381 int alert_timeout = 120;
3382
3383 path = theFile->fullpath;
3384
3385 SL_ENTER(_("sh_unix_getinfo"));
3386
3387 /* --- Stat the file, and get checksum. ---
3388 */
3389 tstart = time(NULL);
3390
3391 stat_return = retry_lstat (FIL__, __LINE__,
3392 path /* theFile->fullpath */, &buf);
3393
3394 if (stat_return)
3395 stat_errno = errno;
3396
3397 fd = -1;
3398 fstat_return = -1;
3399 rval_open = -1;
3400
3401 theFile->link_path = NULL;
3402
3403 if (stat_return == 0 && S_ISREG(buf.st_mode))
3404 {
3405 rval_open = sl_open_fastread (path /* theFile->fullpath */, SL_YESPRIV);
3406 if (SL_ISERROR(rval_open))
3407 err_open = errno;
3408
3409 alert_timeout = 120; /* this is per 8K block now ! */
3410
3411 if (path[1] == 'p' && path[5] == '/' && path[2] == 'r' &&
3412 path[3] == 'o' && path[4] == 'c' && path[0] == '/')
3413 {
3414 /* seven is magic */
3415 alert_timeout = 7;
3416 }
3417
3418 fd = get_the_fd(rval_open);
3419 }
3420
3421 tend = time(NULL);
3422
3423 /* An unprivileged user may slow lstat/open to a crawl
3424 * with clever path/symlink setup
3425 */
3426 if ((tend - tstart) > (time_t) /* 60 */ 6)
3427 {
3428 tmp2 = sh_util_safe_name (theFile->fullpath);
3429 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_TOOLATE,
3430 (long)(tend - tstart), tmp2);
3431 SH_FREE(tmp2);
3432 }
3433
3434 if (fd >= 0)
3435 {
3436 fstat_return = retry_fstat (FIL__, __LINE__, fd, &fbuf);
3437 if (fstat_return)
3438 fstat_errno = errno;
3439 }
3440 else
3441 {
3442 fd = -1;
3443 }
3444
3445
3446 /* --- case 1: lstat failed ---
3447 */
3448 if (stat_return != 0)
3449 {
3450 stat_return = errno;
3451 if (!SL_ISERROR(rval_open))
3452 sl_close(rval_open);
3453 if (sh.flag.checkSum == SH_CHECK_INIT ||
3454 (sh_hash_have_it (theFile->fullpath) >= 0 &&
3455 (!SH_FFLAG_REPORTED_SET(theFile->file_reported))))
3456 {
3457 if (S_FALSE == sh_ignore_chk_del(theFile->fullpath)) {
3458 char errbuf[SH_ERRBUF_SIZE];
3459 uid_t euid;
3460 (void) sl_get_euid(&euid);
3461 tmp2 = sh_util_safe_name (theFile->fullpath);
3462 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
3463 _("lstat"),
3464 sh_error_message (stat_errno, errbuf, sizeof(errbuf)),
3465 (long) euid,
3466 tmp2);
3467 SH_FREE(tmp2);
3468 }
3469 }
3470 SL_RETURN((-1),_("sh_unix_getinfo"));
3471 }
3472
3473 /* --- case 2: not a regular file ---
3474 */
3475 else if (! S_ISREG(buf.st_mode))
3476 {
3477 if (fileHash != NULL)
3478 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3479 }
3480
3481 /* --- case 3a: a regular file, fstat ok ---
3482 */
3483 else if (fstat_return == 0 &&
3484 buf.st_mode == fbuf.st_mode &&
3485 buf.st_ino == fbuf.st_ino &&
3486 buf.st_uid == fbuf.st_uid &&
3487 buf.st_gid == fbuf.st_gid &&
3488 buf.st_dev == fbuf.st_dev )
3489 {
3490 if (fileHash != NULL)
3491 {
3492 if ((theFile->check_mask & MODI_CHK) == 0)
3493 {
3494 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3495 }
3496 else if ((theFile->check_mask & MODI_PREL) != 0 &&
3497 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
3498 alert_timeout, theFile->fullpath))
3499 {
3500 if (0 != sh_prelink_run (theFile->fullpath,
3501 fileHash, alert_timeout))
3502 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3503 }
3504 else
3505 {
3506 char hashbuf[KEYBUF_SIZE];
3507 UINT64 length_nolim = TIGER_NOLIM;
3508
3509 if (MODI_TXT_ENABLED(theFile->check_mask) && fbuf.st_size < (10 * SH_TXT_MAX))
3510 {
3511 sl_init_content (rval_open, fbuf.st_size);
3512 }
3513
3514 sl_strlcpy(fileHash,
3515 sh_tiger_generic_hash (theFile->fullpath,
3516 rval_open, &length_nolim,
3517 alert_timeout,
3518 hashbuf, sizeof(hashbuf)),
3519 KEY_LEN+1);
3520
3521 content = sl_get_content(rval_open);
3522 content = sh_string_copy(content);
3523
3524 if ((theFile->check_mask & MODI_SGROW) != 0)
3525 {
3526 fbuf.st_size = (off_t) length_nolim;
3527 buf.st_size = fbuf.st_size;
3528 sl_rewind(rval_open);
3529 sh_unix_checksum_size (theFile->fullpath, &fbuf,
3530 &fileHash[KEY_LEN + 1],
3531 alert_timeout, rval_open);
3532 }
3533 }
3534 }
3535 }
3536
3537 /* --- case 3b: a regular file, fstat ok, but different ---
3538 */
3539 else if (fstat_return == 0 && S_ISREG(fbuf.st_mode))
3540 {
3541 memcpy (&buf, &fbuf, sizeof( struct stat ));
3542
3543 if (fileHash != NULL)
3544 {
3545 if ((theFile->check_mask & MODI_CHK) == 0)
3546 {
3547 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3548 }
3549 else if (policy == SH_LEVEL_PRELINK &&
3550 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
3551 alert_timeout, theFile->fullpath))
3552 {
3553 if (0 != sh_prelink_run (theFile->fullpath,
3554 fileHash, alert_timeout))
3555 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3556 }
3557 else
3558 {
3559 char hashbuf[KEYBUF_SIZE];
3560 UINT64 length_nolim = TIGER_NOLIM;
3561
3562 if (MODI_TXT_ENABLED(theFile->check_mask) && fbuf.st_size < (10 * SH_TXT_MAX))
3563 {
3564 sl_init_content (rval_open, fbuf.st_size);
3565 }
3566
3567 sl_strlcpy(fileHash,
3568 sh_tiger_generic_hash (theFile->fullpath, rval_open,
3569 &length_nolim,
3570 alert_timeout,
3571 hashbuf, sizeof(hashbuf)),
3572 KEY_LEN + 1);
3573
3574 content = sl_get_content(rval_open);
3575 content = sh_string_copy(content);
3576
3577 if ((theFile->check_mask & MODI_SGROW) != 0)
3578 {
3579 fbuf.st_size = (off_t) length_nolim;
3580 buf.st_size = fbuf.st_size;
3581 sl_rewind(rval_open);
3582 sh_unix_checksum_size (theFile->fullpath, &fbuf,
3583 &fileHash[KEY_LEN + 1],
3584 alert_timeout, rval_open);
3585 }
3586 }
3587 }
3588 }
3589
3590 /* --- case 4: a regular file, fstat failed ---
3591 */
3592
3593 else /* fstat_return != 0 or !S_ISREG(fbuf.st_mode) or open() failed */
3594 {
3595 uid_t euid;
3596
3597 if (fileHash != NULL)
3598 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3599
3600 if ((theFile->check_mask & MODI_CHK) != 0)
3601 {
3602 tmp2 = sh_util_safe_name (theFile->fullpath);
3603
3604
3605 if (fd >= 0 && fstat_return != 0)
3606 {
3607 char errbuf[SH_ERRBUF_SIZE];
3608 (void) sl_get_euid(&euid);
3609
3610 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
3611 _("fstat"),
3612 sh_error_message (fstat_errno, errbuf, sizeof(errbuf)),
3613 (long) euid,
3614 tmp2);
3615 }
3616 else if (fd >= 0 && !S_ISREG(fbuf.st_mode))
3617 {
3618 sh_error_handle (level, FIL__, __LINE__, fstat_errno,
3619 MSG_E_NOTREG, tmp2);
3620 }
3621 else
3622 {
3623 char errbuf[SH_ERRBUF_SIZE];
3624 char errbuf2[SH_ERRBUF_SIZE];
3625 sl_strlcpy(errbuf, sl_error_string(rval_open), sizeof(errbuf));
3626 sh_error_message(err_open, errbuf2, sizeof(errbuf2));
3627 sh_error_handle (level, FIL__, __LINE__, err_open,
3628 MSG_E_READ, errbuf, errbuf2, tmp2);
3629 }
3630 SH_FREE(tmp2);
3631 }
3632 }
3633
3634
3635 /* --- Determine file type. ---
3636 */
3637 memset (theFile->c_mode, '-', CMODE_SIZE-1);
3638 theFile->c_mode[CMODE_SIZE-1] = '\0';
3639
3640 memset (theFile->link_c_mode, '-', CMODE_SIZE-1);
3641 theFile->link_c_mode[CMODE_SIZE-1] = '\0';
3642
3643 sh_unix_getinfo_type (&buf, &type, theFile->c_mode);
3644 theFile->type = type;
3645
3646#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
3647
3648 /* --- Determine file attributes. ---
3649 */
3650 memset (theFile->c_attributes, '-', ATTRBUF_SIZE);
3651 theFile->c_attributes[ATTRBUF_USED] = '\0';
3652 theFile->attributes = 0;
3653
3654 if (theFile->c_mode[0] != 'c' && theFile->c_mode[0] != 'b' &&
3655 theFile->c_mode[0] != 'l' )
3656 sh_unix_getinfo_attr(theFile->fullpath,
3657 &theFile->attributes, theFile->c_attributes,
3658 fd, &buf);
3659#endif
3660
3661#if defined(USE_XATTR) && defined(USE_ACL)
3662 if (sh_unix_check_selinux == S_TRUE || sh_unix_check_acl == S_TRUE)
3663 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
3664#elif defined(USE_XATTR)
3665 if (sh_unix_check_selinux == S_TRUE)
3666 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
3667#elif defined(USE_ACL)
3668 if (sh_unix_check_acl == S_TRUE)
3669 theFile->attr_string = sh_unix_getinfo_acl (theFile->fullpath, fd, &buf);
3670#else
3671 theFile->attr_string = NULL;
3672#endif
3673
3674 if (!SL_ISERROR(rval_open))
3675 sl_close(rval_open);
3676
3677
3678 /* --- I/O limit. ---
3679 */
3680 if (IO_Limit > 0)
3681 {
3682 runtim = (long) (time(NULL) - sh.statistics.time_start);
3683
3684 if (runtim > 0 && (long)(sh.statistics.bytes_hashed/runtim) > IO_Limit)
3685 retry_msleep(1, 0);
3686 }
3687
3688 /* --- Determine permissions. ---
3689 */
3690 sh_unix_getinfo_mode (&buf, &mode, theFile->c_mode);
3691
3692 /* --- Trivia. ---
3693 */
3694 theFile->dev = buf.st_dev;
3695 theFile->ino = buf.st_ino;
3696 theFile->mode = buf.st_mode;
3697 theFile->hardlinks = buf.st_nlink;
3698 theFile->owner = buf.st_uid;
3699 theFile->group = buf.st_gid;
3700 theFile->rdev = buf.st_rdev;
3701 theFile->size = buf.st_size;
3702 theFile->blksize = (unsigned long) buf.st_blksize;
3703 theFile->blocks = (unsigned long) buf.st_blocks;
3704 theFile->atime = buf.st_atime;
3705 theFile->mtime = buf.st_mtime;
3706 theFile->ctime = buf.st_ctime;
3707
3708
3709 /* --- Owner and group. ---
3710 */
3711
3712 if (NULL == sh_unix_getGIDname(SH_ERR_ALL, buf.st_gid, theFile->c_group, GROUP_MAX+1)) {
3713
3714 tmp2 = sh_util_safe_name (theFile->fullpath);
3715
3716 if (policy == SH_LEVEL_ALLIGNORE)
3717 {
3718 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
3719 MSG_FI_NOGRP,
3720 (long) buf.st_gid, tmp2);
3721 }
3722 else
3723 {
3724 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
3725 MSG_FI_NOGRP,
3726 (long) buf.st_gid, tmp2);
3727 }
3728 SH_FREE(tmp2);
3729 sl_snprintf(theFile->c_group, GROUP_MAX+1, "%d", (long) buf.st_gid);
3730 }
3731
3732
3733 if (NULL == sh_unix_getUIDname(SH_ERR_ALL, buf.st_uid, theFile->c_owner, USER_MAX+1)) {
3734
3735 tmp2 = sh_util_safe_name (theFile->fullpath);
3736
3737 if (policy == SH_LEVEL_ALLIGNORE)
3738 {
3739 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
3740 MSG_FI_NOUSR,
3741 (long) buf.st_uid, tmp2);
3742 }
3743 else
3744 {
3745 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
3746 MSG_FI_NOUSR,
3747 (long) buf.st_uid, tmp2);
3748 }
3749 SH_FREE(tmp2);
3750 sl_snprintf(theFile->c_owner, USER_MAX+1, "%d", (long) buf.st_uid);
3751 }
3752
3753 /* --- Output the file. ---
3754 */
3755 if (flag_err_debug == SL_TRUE)
3756 {
3757 tmp2 = sh_util_safe_name ((filename == NULL) ?
3758 theFile->fullpath : filename);
3759 (void) sh_unix_time(theFile->mtime, timestr, sizeof(timestr));
3760 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LIST,
3761 theFile->c_mode,
3762 theFile->hardlinks,
3763 theFile->c_owner,
3764 theFile->c_group,
3765 (unsigned long) theFile->size,
3766 timestr,
3767 tmp2);
3768 SH_FREE(tmp2);
3769 }
3770
3771 /* --- Check for links. ---
3772 */
3773 if (theFile->c_mode[0] == 'l')
3774 {
3775 linknamebuf = SH_ALLOC(PATH_MAX);
3776
3777 /* flawfinder: ignore */
3778 linksize = readlink (theFile->fullpath, linknamebuf, PATH_MAX-1);
3779
3780 if (linksize < (PATH_MAX-1) && linksize >= 0)
3781 linknamebuf[linksize] = '\0';
3782 else
3783 linknamebuf[PATH_MAX-1] = '\0';
3784
3785 if (linksize < 0)
3786 {
3787 char errbuf[SH_ERRBUF_SIZE];
3788 linksize = errno;
3789 tmp2 = sh_util_safe_name (theFile->fullpath);
3790 sh_error_handle (level, FIL__, __LINE__, linksize, MSG_FI_RDLNK,
3791 sh_error_message (linksize, errbuf, sizeof(errbuf)), tmp2);
3792 SH_FREE(tmp2);
3793 SH_FREE(linknamebuf);
3794 theFile->link_path = sh_util_strdup("-");
3795 SL_RETURN((-1),_("sh_unix_getinfo"));
3796 }
3797
3798 if (linknamebuf[0] == '/')
3799 {
3800 theFile->link_path = sh_util_strdup (linknamebuf);
3801 }
3802 else
3803 {
3804 tmp = sh_util_dirname(theFile->fullpath);
3805 if (tmp) {
3806 theFile->link_path = SH_ALLOC(PATH_MAX);
3807 sl_strlcpy (theFile->link_path, tmp, PATH_MAX);
3808 SH_FREE(tmp);
3809 } else {
3810 theFile->link_path = SH_ALLOC(PATH_MAX);
3811 theFile->link_path[0] = '\0';
3812 }
3813 /*
3814 * Only attach '/' if not root directory. Handle "//", which
3815 * according to POSIX is implementation-defined, and may be
3816 * different from "/" (however, three or more '/' will collapse
3817 * to one).
3818 */
3819 tmp = theFile->link_path; while (*tmp == '/') ++tmp;
3820 if (*tmp != '\0')
3821 {
3822 sl_strlcat (theFile->link_path, "/", PATH_MAX);
3823 }
3824 sl_strlcat (theFile->link_path, linknamebuf, PATH_MAX);
3825 }
3826
3827 /* stat the link
3828 */
3829 stat_return = retry_lstat (FIL__, __LINE__, theFile->link_path, &lbuf);
3830
3831 /* check for error
3832 */
3833 if (stat_return != 0)
3834 {
3835 stat_return = errno;
3836 tmp = sh_util_safe_name (theFile->fullpath);
3837 tmp2 = sh_util_safe_name (theFile->link_path);
3838 if (stat_return != ENOENT)
3839 {
3840 uid_t euid;
3841 char errbuf[SH_ERRBUF_SIZE];
3842
3843 (void) sl_get_euid(&euid);
3844 sh_error_handle (level, FIL__, __LINE__, stat_return,
3845 MSG_FI_STAT,
3846 _("lstat"),
3847 sh_error_message (stat_return,errbuf, sizeof(errbuf)),
3848 (long) euid,
3849 tmp2);
3850 }
3851 else
3852 {
3853 /* a dangling link -- everybody seems to have plenty of them
3854 */
3855 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_DLNK,
3856 tmp, tmp2);
3857 }
3858 theFile->linkisok = BAD;
3859 SH_FREE(tmp);
3860 SH_FREE(tmp2);
3861 SH_FREE(linknamebuf);
3862 /*
3863 * changed Tue Feb 10 16:16:13 CET 2004:
3864 * add dangling symlinks into database
3865 * SL_RETURN((-1),_("sh_unix_getinfo"));
3866 */
3867 theFile->linkmode = 0;
3868 SL_RETURN((0),_("sh_unix_getinfo"));
3869 }
3870
3871 theFile->linkisok = GOOD;
3872
3873
3874 /* --- Determine file type. ---
3875 */
3876 sh_unix_getinfo_type (&lbuf, &type, theFile->link_c_mode);
3877 theFile->type = type;
3878
3879 /* --- Determine permissions. ---
3880 */
3881 sh_unix_getinfo_mode (&lbuf, &mode, theFile->link_c_mode);
3882 theFile->linkmode = lbuf.st_mode;
3883
3884 /* --- Output the link. ---
3885 */
3886 if (theFile->linkisok == GOOD)
3887 {
3888 tmp2 = sh_util_safe_name (linknamebuf);
3889 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LLNK,
3890 theFile->link_c_mode, tmp2);
3891 SH_FREE(tmp2);
3892 }
3893 SH_FREE(linknamebuf);
3894 }
3895 else /* not a link */
3896 {
3897 if (content)
3898 {
3899#ifdef HAVE_LIBZ
3900 unsigned long clen;
3901 unsigned char * compressed;
3902#ifdef HAVE_COMPRESSBOUND
3903 clen = compressBound(sh_string_len(content));
3904#else
3905 if (sh_string_len(content) > 10*SH_TXT_MAX)
3906 clen = SH_TXT_MAX;
3907 else
3908 clen = 13 + (int)(1.0001*sh_string_len(content));
3909#endif
3910 compressed = SH_ALLOC(clen);
3911 if (Z_OK == compress(compressed, &clen,
3912 (unsigned char *) sh_string_str(content),
3913 sh_string_len(content)))
3914 {
3915 if (clen < SH_TXT_MAX)
3916 {
3917 sh_util_base64_enc_alloc (&(theFile->link_path),
3918 (char *) compressed, clen);
3919 }
3920 else
3921 {
3922 char tmsg[128];
3923 char * tpath = sh_util_safe_name (theFile->fullpath);
3924 sl_snprintf(tmsg, sizeof(tmsg),
3925 _("compressed file too large (%lu bytes)"),
3926 clen);
3927 sh_error_handle (SH_ERR_WARN, FIL__, __LINE__, -1,
3928 MSG_E_SUBGPATH, tmsg,
3929 _("sh_unix_getinfo"), tpath);
3930 SH_FREE(tpath);
3931 }
3932 }
3933 SH_FREE(compressed);
3934#endif
3935 sh_string_destroy(&content);
3936 }
3937 }
3938 SL_RETURN((0),_("sh_unix_getinfo"));
3939}
3940
3941/* #if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE) */
3942#endif
3943
3944int sh_unix_unlock(char * lockfile, char * flag)
3945{
3946 int error = 0;
3947
3948 SL_ENTER(_("sh_unix_unlock"));
3949
3950 if (sh.flag.isdaemon == S_FALSE && flag == NULL)
3951 SL_RETURN((0),_("sh_unix_unlock"));
3952
3953 /* --- Logfile is not locked to us. ---
3954 */
3955 if (sh.flag.islocked == BAD && flag != NULL)
3956 SL_RETURN((-1),_("sh_unix_unlock"));
3957
3958 /* --- Check whether the directory is secure. ---
3959 */
3960 if (0 != tf_trust_check (lockfile, SL_YESPRIV))
3961 SL_RETURN((-1),_("sh_unix_unlock"));
3962
3963 /* --- Delete the lock file. ---
3964 */
3965 error = retry_aud_unlink (FIL__, __LINE__, lockfile);
3966
3967 if (error == 0)
3968 {
3969 if (flag != NULL)
3970 sh.flag.islocked = BAD; /* not locked anymore */
3971 }
3972 else if (flag != NULL)
3973 {
3974 char errbuf[SH_ERRBUF_SIZE];
3975 error = errno;
3976 sh_error_handle ((-1), FIL__, __LINE__, error, MSG_E_UNLNK,
3977 sh_error_message(error, errbuf, sizeof(errbuf)),
3978 lockfile);
3979 SL_RETURN((-1),_("sh_unix_unlock"));
3980 }
3981 SL_RETURN((0),_("sh_unix_unlock"));
3982}
3983
3984int sh_unix_lock (char * lockfile, char * flag)
3985{
3986 int filed;
3987 int errnum;
3988 char myPid[64];
3989 SL_TICKET fd;
3990 extern int get_the_fd (SL_TICKET ticket);
3991
3992 SL_ENTER(_("sh_unix_lock"));
3993
3994 sprintf (myPid, "%ld\n", (long) sh.pid); /* known to fit */
3995
3996 fd = sl_open_safe_rdwr (lockfile, SL_YESPRIV); /* fails if file exists */
3997
3998 if (!SL_ISERROR(fd))
3999 {
4000 errnum = sl_write (fd, myPid, sl_strlen(myPid));
4001 filed = get_the_fd(fd);
4002 fchmod (filed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
4003 sl_close (fd);
4004
4005 if (!SL_ISERROR(errnum))
4006 {
4007 if (flag != NULL)
4008 sh.flag.islocked = GOOD;
4009 SL_RETURN((0),_("sh_unix_lock"));
4010 }
4011 }
4012
4013 TPT((0, FIL__, __LINE__, _("msg=<open pid file failed>\n")));
4014 if (flag != NULL)
4015 sh.flag.islocked = BAD;
4016 SL_RETURN((-1),_("sh_unix_lock"));
4017
4018 /* notreached */
4019}
4020
4021
4022/* check whether file is locked
4023 */
4024int sh_unix_test_and_lock (char * filename, char * lockfile)
4025{
4026 static struct stat buf;
4027 int status = 0;
4028
4029
4030 SL_TICKET fd;
4031 char line_in[128];
4032
4033 SL_ENTER(_("sh_unix_test_and_lock"));
4034
4035 status = retry_lstat (FIL__, __LINE__, lockfile, &buf);
4036
4037 /* --- No lock file found, try to lock. ---
4038 */
4039
4040 if (status < 0 && errno == ENOENT)
4041 {
4042 if (0 == sh_unix_lock (lockfile, filename))
4043 {
4044 if (filename != NULL)
4045 sh.flag.islocked = GOOD;
4046 SL_RETURN((0),_("sh_unix_test_and_lock"));
4047 }
4048 else
4049 {
4050 sh_error_handle ((-1), FIL__, __LINE__, status,
4051 MSG_E_SUBGEN,
4052 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
4053 _("sh_unix_test_and_lock"));
4054 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4055 }
4056 }
4057 else if (status == 0 && buf.st_size == 0)
4058 {
4059 if (filename != NULL)
4060 sh.flag.islocked = GOOD;
4061 sh_unix_unlock (lockfile, filename);
4062 if (filename != NULL)
4063 sh.flag.islocked = BAD;
4064 if (0 == sh_unix_lock (lockfile, filename))
4065 {
4066 if (filename != NULL)
4067 sh.flag.islocked = GOOD;
4068 SL_RETURN((0),_("sh_unix_test_and_lock"));
4069 }
4070 else
4071 {
4072 sh_error_handle ((-1), FIL__, __LINE__, status,
4073 MSG_E_SUBGEN,
4074 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
4075 _("sh_unix_test_and_lock"));
4076 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4077 }
4078 }
4079
4080 /* --- Check on lock. ---
4081 */
4082
4083 if (status >= 0)
4084 {
4085 fd = sl_open_read (lockfile, SL_YESPRIV);
4086 if (SL_ISERROR(fd))
4087 sh_error_handle ((-1), FIL__, __LINE__, fd,
4088 MSG_E_SUBGEN,
4089 (filename == NULL) ? _("Cannot open PID file for read") : _("Cannot open lock file for read"),
4090 _("sh_unix_test_and_lock"));
4091 }
4092 else
4093 fd = -1;
4094
4095 if (!SL_ISERROR(fd))
4096 {
4097 /* read the PID in the lock file
4098 */
4099 status = sl_read (fd, line_in, sizeof(line_in));
4100 line_in[sizeof(line_in)-1] = '\0';
4101
4102 /* convert to numeric
4103 */
4104 if (status > 0)
4105 {
4106 errno = 0;
4107 status = strtol(line_in, (char **)NULL, 10);
4108 if (errno == ERANGE || status <= 0)
4109 {
4110 sh_error_handle ((-1), FIL__, __LINE__, status,
4111 MSG_E_SUBGEN,
4112 (filename == NULL) ? _("Bad PID in PID file") : _("Bad PID in lock file"),
4113 _("sh_unix_test_and_lock"));
4114
4115 status = -1;
4116 }
4117 }
4118 else
4119 {
4120 sh_error_handle ((-1), FIL__, __LINE__, status,
4121 MSG_E_SUBGEN,
4122 (filename == NULL) ? _("Cannot read PID file") : _("Cannot read lock file"),
4123 _("sh_unix_test_and_lock"));
4124 }
4125 sl_close(fd);
4126
4127 if (status > 0 && (unsigned int) status == sh.pid)
4128 {
4129 if (filename != NULL)
4130 sh.flag.islocked = GOOD;
4131 SL_RETURN((0),_("sh_unix_test_and_lock"));
4132 }
4133
4134
4135 /* --- Check whether the process exists. ---
4136 */
4137 if (status > 0)
4138 {
4139 errno = 0;
4140 status = aud_kill (FIL__, __LINE__, status, 0);
4141
4142 /* Does not exist, so remove the stale lock
4143 * and create a new one.
4144 */
4145 if (status < 0 && errno == ESRCH)
4146 {
4147 if (filename != NULL)
4148 sh.flag.islocked = GOOD;
4149 if (0 != sh_unix_unlock(lockfile, filename) && (filename !=NULL))
4150 sh.flag.islocked = BAD;
4151 else
4152 {
4153 if (0 == sh_unix_lock (lockfile, filename))
4154 {
4155 if (filename != NULL)
4156 sh.flag.islocked = GOOD;
4157 SL_RETURN((0),_("sh_unix_test_and_lock"));
4158 }
4159 else
4160 {
4161 sh_error_handle ((-1), FIL__, __LINE__, status,
4162 MSG_E_SUBGEN,
4163 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
4164 _("sh_unix_test_and_lock"));
4165 }
4166 if (filename != NULL)
4167 sh.flag.islocked = BAD;
4168 }
4169 }
4170 else
4171 {
4172 sh_error_handle ((-1), FIL__, __LINE__, status,
4173 MSG_E_SUBGEN,
4174 (filename == NULL) ? _("Cannot remove stale PID file, PID may be a running process") : _("Cannot remove stale lock file, PID may be a running process"),
4175 _("sh_unix_test_and_lock"));
4176 if (filename != NULL)
4177 sh.flag.islocked = BAD;
4178 }
4179 }
4180 }
4181 SL_RETURN((-1),_("sh_unix_testlock"));
4182}
4183
4184/* write the PID file
4185 */
4186int sh_unix_write_pid_file()
4187{
4188 return sh_unix_test_and_lock(NULL, sh.srvlog.alt);
4189}
4190
4191/* write lock for filename
4192 */
4193int sh_unix_write_lock_file(char * filename)
4194{
4195 size_t len;
4196 int res;
4197 char * lockfile;
4198
4199 if (filename == NULL)
4200 return (-1);
4201
4202 len = sl_strlen(filename);
4203 if (sl_ok_adds(len, 6))
4204 len += 6;
4205 lockfile = SH_ALLOC(len);
4206 sl_strlcpy(lockfile, filename, len);
4207 sl_strlcat(lockfile, _(".lock"), len);
4208 res = sh_unix_test_and_lock(filename, lockfile);
4209 SH_FREE(lockfile);
4210 return res;
4211}
4212
4213/* rm lock for filename
4214 */
4215int sh_unix_rm_lock_file(char * filename)
4216{
4217 size_t len;
4218 int res;
4219 char * lockfile;
4220
4221 if (filename == NULL)
4222 return (-1);
4223
4224 len = sl_strlen(filename);
4225 if (sl_ok_adds(len, 6))
4226 len += 6;
4227 lockfile = SH_ALLOC(len);
4228 sl_strlcpy(lockfile, filename, len);
4229 sl_strlcat(lockfile, _(".lock"), len);
4230
4231 res = sh_unix_unlock(lockfile, filename);
4232 SH_FREE(lockfile);
4233 return res;
4234}
4235
4236/* rm lock for filename
4237 */
4238int sh_unix_rm_pid_file()
4239{
4240 return sh_unix_unlock(sh.srvlog.alt, NULL);
4241}
4242
4243/* Test whether file exists
4244 */
4245int sh_unix_file_exists(char * path)
4246{
4247 struct stat buf;
4248
4249 SL_ENTER(_("sh_unix_file_exists"));
4250
4251 if (-1 == retry_stat(FIL__, __LINE__, path, &buf))
4252 SL_RETURN( S_FALSE, _("sh_unix_file_exists"));
4253 else
4254 SL_RETURN( S_TRUE, _("sh_unix_file_exists"));
4255}
4256
4257
4258/* Test whether file exists, is a character device, and allows read
4259 * access.
4260 */
4261int sh_unix_device_readable(int fd)
4262{
4263 struct stat buf;
4264
4265 SL_ENTER(_("sh_unix_device_readable"));
4266
4267 if (retry_fstat(FIL__, __LINE__, fd, &buf) == -1)
4268 SL_RETURN( (-1), _("sh_unix_device_readable"));
4269 else if ( S_ISCHR(buf.st_mode) && 0 != (S_IROTH & buf.st_mode) )
4270 SL_RETURN( (0), _("sh_unix_device_readable"));
4271 else
4272 SL_RETURN( (-1), _("sh_unix_device_readable"));
4273}
4274
4275static char preq[16];
4276
4277/* return true if database is remote
4278 */
4279int file_is_remote ()
4280{
4281 static int init = 0;
4282 struct stat buf;
4283
4284 SL_ENTER(_("file_is_remote"));
4285
4286 if (init == 0)
4287 {
4288 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4289 ++init;
4290 }
4291 if (0 == sl_strncmp (sh.data.path, preq, 15))
4292 {
4293 if (sh.data.path[15] != '\0') /* should be start of path */
4294 {
4295 if (0 == stat(&(sh.data.path[15]), &buf))
4296 {
4297 SL_RETURN( S_FALSE, _("file_is_remote"));
4298 }
4299 }
4300 SL_RETURN( S_TRUE, _("file_is_remote"));
4301 }
4302 SL_RETURN( S_FALSE, _("file_is_remote"));
4303}
4304
4305/* Return the path to the configuration/database file.
4306 */
4307char * file_path(char what, char flag)
4308{
4309 static int init = 0;
4310
4311 SL_ENTER(_("file_path"));
4312
4313 if (init == 0)
4314 {
4315 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4316 ++init;
4317 }
4318
4319 switch (what)
4320 {
4321
4322 case 'C':
4323 if (0 == sl_strncmp (sh.conf.path, preq, 15))
4324 {
4325#if defined(SH_WITH_SERVER)
4326 if (sh.flag.isserver == S_TRUE && sl_strlen(sh.conf.path) == 15)
4327 SL_RETURN( NULL, _("file_path"));
4328 if (sh.flag.isserver == S_TRUE)
4329 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4330#endif
4331 if (flag == 'R')
4332 SL_RETURN( preq, _("file_path"));
4333 if (flag == 'I')
4334 {
4335 if (sl_strlen(sh.conf.path) == 15)
4336 SL_RETURN( NULL, _("file_path"));
4337 else
4338 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4339 }
4340 SL_RETURN ( preq, _("file_path"));
4341 }
4342 else
4343 SL_RETURN( sh.conf.path, _("file_path"));
4344 /* break; *//* unreachable */
4345
4346 case 'D':
4347 if (0 == sl_strncmp (sh.data.path, preq, 15))
4348 {
4349 if (flag == 'R')
4350 SL_RETURN( preq, _("file_path"));
4351 if (flag == 'W' && sl_strlen(sh.data.path) == 15)
4352 SL_RETURN (NULL, _("file_path"));
4353 if (flag == 'W')
4354 SL_RETURN( &(sh.data.path[15]), _("file_path"));
4355 }
4356 else
4357 SL_RETURN( sh.data.path, _("file_path"));
4358 break;
4359
4360 default:
4361 SL_RETURN( NULL, _("file_path"));
4362 }
4363
4364 return NULL; /* notreached */
4365}
4366/************************************************/
4367/**** Mlock Utilities ****/
4368/************************************************/
4369
4370#include <limits.h>
4371
4372int sh_unix_pagesize()
4373{
4374 int pagesize = 4096;
4375#if defined(_SC_PAGESIZE)
4376 pagesize = sysconf(_SC_PAGESIZE);
4377#elif defined(_SC_PAGE_SIZE)
4378 pagesize = sysconf(_SC_PAGE_SIZE);
4379#elif defined(HAVE_GETPAGESIZE)
4380 pagesize = getpagesize();
4381#elif defined(PAGESIZE)
4382 pagesize = PAGESIZE;
4383#endif
4384
4385 return ((pagesize > 0) ? pagesize : 4096);
4386}
4387
4388typedef struct sh_page_lt {
4389 unsigned long page_start;
4390 int page_refcount;
4391 char file[64];
4392 int line;
4393 struct sh_page_lt * next;
4394} sh_page_l;
4395
4396sh_page_l * sh_page_locked = NULL;
4397volatile int page_locking = 0;
4398
4399unsigned long sh_unix_lookup_page (void * in_addr, size_t len, int * num_pages)
4400{
4401 int pagesize = sh_unix_pagesize();
4402 unsigned long addr = (unsigned long) in_addr;
4403
4404 unsigned long pagebase;
4405 unsigned long pagediff;
4406 unsigned long pagenum = addr / pagesize;
4407
4408 SL_ENTER(_("sh_unix_lookup_page"));
4409#if 0
4410 fprintf(stderr, "mlock: --> base %ld, pagenum: %ld\n",
4411 addr, pagenum);
4412#endif
4413
4414 /* address of first page
4415 */
4416 pagebase = pagenum * pagesize;
4417
4418 /* number of pages
4419 */
4420 pagediff = (addr + len) - pagebase;
4421 pagenum = pagediff / pagesize;
4422 if (pagenum * pagesize < pagediff)
4423 ++pagenum;
4424
4425#if 0
4426 fprintf(stderr, "mlock: --> pagebase %ld, pagediff %ld, (addr + len) %ld\n",
4427 pagebase, pagediff, (addr + len));
4428#endif
4429
4430 *num_pages = pagenum;
4431 SL_RETURN((pagebase), _("sh_unix_lookup_page"));
4432}
4433
4434
4435#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
4436
4437SH_MUTEX_STATIC(mutex_mlock,PTHREAD_MUTEX_INITIALIZER);
4438
4439int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
4440{
4441 int num_pages;
4442 int status = 0;
4443 int pagesize;
4444 sh_page_l * page_list = sh_page_locked;
4445 unsigned long addr;
4446#ifdef TEST_MLOCK
4447 int i = 0;
4448#endif
4449
4450 SL_ENTER(_("sh_unix_mlock"));
4451
4452 /* There's no cancellation point here, except if tracing is on
4453 */
4454 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
4455
4456 if (0 != page_locking)
4457 {
4458 status = -1;
4459 goto exit_mlock;
4460 }
4461
4462 page_locking = 1;
4463
4464 pagesize = sh_unix_pagesize();
4465 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
4466
4467#ifdef TEST_MLOCK
4468 fprintf(stderr, "mlock: addr %ld, base %ld, pages: %d, length %d\n",
4469 (unsigned long) in_addr, addr, num_pages, len);
4470#endif
4471
4472 /* increase refcount of locked pages
4473 * addr is first page; num_pages is #(consecutive pages) to lock
4474 */
4475
4476 while ((page_list != NULL) && (num_pages > 0))
4477 {
4478#ifdef TEST_MLOCK
4479 fprintf(stderr, "mlock: check page %d: %ld [%d]\n",
4480 i, page_list->page_start, page_list->page_refcount);
4481#endif
4482 if (page_list->page_start == addr)
4483 {
4484 page_list->page_refcount += 1;
4485 num_pages -= 1;
4486 addr += pagesize;
4487#ifdef TEST_MLOCK
4488 fprintf(stderr, "mlock: found page %d: %ld [%d], next page %ld\n",
4489 i, page_list->page_start, page_list->page_refcount, addr);
4490#endif
4491 }
4492#ifdef TEST_MLOCK
4493 ++i;
4494#endif
4495 page_list = page_list->next;
4496 }
4497
4498 /* mlock some more pages, if needed
4499 */
4500 while (num_pages > 0)
4501 {
4502#ifdef TEST_MLOCK
4503 fprintf(stderr, "mlock: lock page %d: mlock %ld [num_pages %d]\n",
4504 i, addr, num_pages);
4505 ++i;
4506#endif
4507 page_list = SH_ALLOC(sizeof(sh_page_l));
4508 page_list->page_start = addr;
4509 page_list->page_refcount = 1;
4510 sl_strlcpy(page_list->file, file, 64);
4511 page_list->line = line;
4512 status = mlock( (void *) addr, pagesize);
4513 if (status != 0)
4514 {
4515#ifdef TEST_MLOCK
4516 char errbuf[SH_ERRBUF_SIZE];
4517 fprintf(stderr, "mlock: error: %s\n",
4518 sh_error_message(errno, errbuf, sizeof(errbuf)));
4519#endif
4520 SH_FREE(page_list);
4521 page_locking = 0;
4522 goto exit_mlock;
4523 }
4524 page_list->next = sh_page_locked;
4525 sh_page_locked = page_list;
4526 num_pages -= 1;
4527 addr += pagesize;
4528 }
4529 page_locking = 0;
4530
4531 exit_mlock:
4532 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
4533
4534 SL_RETURN((status), _("sh_unix_mlock"));
4535}
4536#else
4537int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
4538{
4539 (void) file; (void) line;
4540 (void) in_addr; (void) len;
4541 return -1;
4542}
4543#endif
4544
4545#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
4546int sh_unix_munlock (void * in_addr, size_t len)
4547{
4548 int num_pages;
4549 int unlocked = 0;
4550 int status = 0;
4551 int pagesize;
4552 sh_page_l * page_list = sh_page_locked;
4553 sh_page_l * page_last;
4554 unsigned long addr;
4555
4556 int test_count;
4557 int test_status;
4558 int test_pages;
4559
4560#ifdef TEST_MLOCK
4561 int i = 0;
4562#endif
4563
4564 SL_ENTER(_("sh_unix_munlock"));
4565
4566 /* There's no cancellation point here, except if tracing is on
4567 */
4568 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
4569
4570 if (0 != page_locking)
4571 {
4572 status = -1;
4573 goto exit_munlock;
4574 }
4575 page_locking = 1;
4576
4577 pagesize = sh_unix_pagesize();
4578 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
4579
4580#ifdef TEST_MLOCK
4581 fprintf(stderr, "munlock: in_addr %ld, addr %ld, pages: %d, length %d\n",
4582 (unsigned long) in_addr, addr, num_pages, len);
4583#endif
4584
4585 test_pages = num_pages;
4586
4587 /* reduce refcount of locked pages
4588 * addr is first page; num_pages is #(consecutive pages) to lock
4589 */
4590 while ((page_list != NULL) && (num_pages > 0))
4591 {
4592#ifdef TEST_MLOCK
4593 fprintf(stderr, "munlock: page %d: %ld [%d]\n",
4594 i, page_list->page_start, page_list->page_refcount);
4595#endif
4596
4597 test_status = 0;
4598 for (test_count = 0; test_count < test_pages; ++test_count)
4599 {
4600 if (page_list->page_start == (addr + (test_count * pagesize)))
4601 {
4602 test_status = 1;
4603 break;
4604 }
4605 }
4606
4607 if (test_status == 1)
4608 {
4609 page_list->page_refcount -= 1;
4610 if (page_list->page_refcount == 0)
4611 {
4612 status = munlock ( (void *) addr, pagesize);
4613 ++unlocked;
4614 }
4615 num_pages -= 1;
4616#ifdef TEST_MLOCK
4617 fprintf(stderr,
4618 "munlock: page %d: %ld [refcount %d], refcount reduced\n",
4619 i, page_list->page_start, page_list->page_refcount);
4620#endif
4621 }
4622#ifdef TEST_MLOCK
4623 ++i;
4624#endif
4625 page_list = page_list->next;
4626 }
4627
4628#ifdef TEST_MLOCK
4629 i = 0;
4630#endif
4631
4632 if (unlocked > 0)
4633 {
4634 page_list = sh_page_locked;
4635 page_last = sh_page_locked;
4636
4637 while ((page_list != NULL) && (unlocked > 0))
4638 {
4639 if (page_list->page_refcount == 0)
4640 {
4641#ifdef TEST_MLOCK
4642 fprintf(stderr, "munlock: remove page %d: %ld [refcount %d]\n",
4643 i, page_list->page_start, page_list->page_refcount);
4644#endif
4645 if (page_last != page_list)
4646 {
4647 page_last->next = page_list->next;
4648 SH_FREE(page_list);
4649 page_list = page_last->next;
4650 }
4651 else
4652 {
4653 page_last = page_list->next;
4654 if (page_list == sh_page_locked)
4655 sh_page_locked = page_list->next;
4656 SH_FREE(page_list);
4657 page_list = page_last;
4658 }
4659 --unlocked;
4660 }
4661 else
4662 {
4663#ifdef TEST_MLOCK
4664 fprintf(stderr, "munlock: skip page %d: %ld [refcount %d]\n",
4665 i, page_list->page_start, page_list->page_refcount);
4666#endif
4667
4668 page_last = page_list;
4669 page_list = page_list->next;
4670 }
4671#ifdef TEST_MLOCK
4672 ++i;
4673#endif
4674 }
4675 }
4676
4677 page_locking = 0;
4678
4679 exit_munlock:
4680 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
4681 SL_RETURN((status), _("sh_unix_munlock"));
4682}
4683#else
4684int sh_unix_munlock (void * in_addr, size_t len)
4685{
4686 (void) in_addr; (void) len;
4687 return -1;
4688}
4689#endif
4690
4691int sh_unix_count_mlock()
4692{
4693 int i = 0;
4694 char str[128];
4695 sh_page_l * page_list = sh_page_locked;
4696
4697 SL_ENTER(_("sh_unix_count_mlock"));
4698 while (page_list != NULL)
4699 {
4700#ifdef WITH_TPT
4701 sl_snprintf(str, sizeof(str), _("file: %s line: %d page: %d"),
4702 page_list->file, page_list->line, i+1);
4703 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, i, MSG_E_SUBGEN,
4704 str, _("sh_unix_count_mlock"));
4705#endif
4706 page_list = page_list->next;
4707 ++i;
4708 }
4709 sl_snprintf(str, sizeof(str), _("%d pages locked"), i);
4710 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, i, MSG_E_SUBGEN,
4711 str, _("sh_unix_count_mlock"));
4712 SL_RETURN((i), _("sh_unix_count_mlock"));
4713}
4714
4715/************************************************/
4716/************************************************/
4717/**** Stealth Utilities ****/
4718/************************************************/
4719/************************************************/
4720#ifdef SH_STEALTH
4721
4722void sh_unix_xor_code (char * str, int len)
4723{
4724 register int i;
4725
4726 for (i = 0; i < len; ++i) str[i] ^= (char) XOR_CODE;
4727 return;
4728}
4729
4730#if !defined(SH_STEALTH_MICRO)
4731
4732
4733int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
4734 unsigned long * bytes_read);
4735unsigned long first_hex_block(SL_TICKET fd, unsigned long * max);
4736
4737/*
4738 * --- Get hidden data from a block of hex data. ---
4739 */
4740int sh_unix_getline_stealth (SL_TICKET fd, char * str, int len)
4741{
4742 int add_off = 0, llen;
4743 static unsigned long off_data = 0;
4744 static unsigned long max_data = 0;
4745 static unsigned long bytes_read = 0;
4746 static int stealth_init = BAD;
4747
4748 SL_ENTER(_("sh_unix_getline_stealth"));
4749
4750 if (str == NULL)
4751 {
4752 off_data = 0;
4753 max_data = 0;
4754 bytes_read = 0;
4755 stealth_init = BAD;
4756 SL_RETURN(0, _("sh_unix_getline_stealth"));
4757 }
4758
4759 /* --- Initialize. ---
4760 */
4761 if (stealth_init == BAD)
4762 {
4763 off_data = first_hex_block(fd, &max_data);
4764 if (off_data == 0)
4765 {
4766 dlog(1, FIL__, __LINE__,
4767 _("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"));
4768 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
4769 _("Stealth config file."));
4770 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
4771 }
4772 stealth_init = GOOD;
4773 max_data += off_data;
4774 }
4775
4776 /* --- Seek to proper position. ---
4777 */
4778 if (bytes_read >= max_data || add_off < 0)
4779 {
4780 dlog(1, FIL__, __LINE__,
4781 _("The capacity of the container image file for the stealth config file seems to be too small. Your config file is likely truncated.\n"));
4782 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
4783 _("Stealth config file."));
4784 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
4785 }
4786 sl_seek(fd, off_data);
4787
4788 /* --- Read one line. ---
4789 */
4790 add_off = hideout_hex_block(fd, (unsigned char *) str, len, &bytes_read);
4791 off_data += add_off;
4792
4793 llen = sl_strlen(str);
4794 SL_RETURN(llen, _("sh_unix_getline_stealth"));
4795}
4796
4797int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
4798 unsigned long * bytes_read)
4799{
4800
4801 register int i, j, k;
4802 unsigned char c, e;
4803 register int num;
4804 unsigned char mask[9] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
4805 unsigned long here = 0;
4806 unsigned long retval = 0;
4807 unsigned long bread = 0;
4808
4809 SL_ENTER(_("hideout_hex_block"));
4810
4811 ASSERT_RET((len > 1), _("len > 1"), (0));
4812
4813 --len;
4814
4815 i = 0;
4816 while (i < len)
4817 {
4818 for (j = 0; j < 8; ++j)
4819 {
4820
4821 /* --- Get a low byte, modify, read back. ---
4822 */
4823 for (k = 0; k < 2; ++k)
4824 {
4825 /* -- Skip whitespace. ---
4826 */
4827 c = ' ';
4828 do {
4829 do {
4830 num = sl_read (fd, &c, 1);
4831 } while (num == 0 && errno == EINTR);
4832 if (num > 0)
4833 ++here;
4834 else if (num == 0)
4835 SL_RETURN((0), _("hideout_hex_block"));
4836 else
4837 SL_RETURN((-1), _("hideout_hex_block"));
4838 } while (c == '\n' || c == '\t' || c == '\r' ||
4839 c == ' ');
4840 }
4841
4842
4843 /* --- e is the value of the low byte. ---
4844 */
4845 e = (unsigned char) sh_util_hexchar( c );
4846 if ((e & mask[7]) != 0) /* bit is set */
4847 str[i] |= mask[j];
4848 else /* bit is not set */
4849 str[i] &= ~mask[j];
4850
4851 bread += 1;
4852 }
4853 if (str[i] == '\n') break;
4854 ++i;
4855 }
4856
4857 if (i != 0)
4858 str[i] = '\0';
4859 else
4860 str[i+1] = '\0'; /* keep newline and terminate */
4861 retval += here;
4862 *bytes_read += (bread/8);
4863
4864 SL_RETURN(retval, _("hideout_hex_block"));
4865}
4866
4867/* --- Get offset of first data block. ---
4868 */
4869unsigned long first_hex_block(SL_TICKET fd, unsigned long * max)
4870{
4871 unsigned int i;
4872 long num = 1;
4873 unsigned long lnum;
4874 char c;
4875 int nothex = 0;
4876 unsigned long retval = 0;
4877 unsigned int this_line = 0;
4878 char theline[SH_BUFSIZE];
4879
4880 SL_ENTER(_("first_hex_block"));
4881
4882 *max = 0;
4883
4884 while (1)
4885 {
4886 theline[0] = '\0';
4887 this_line = 0;
4888 c = '\0';
4889 while (c != '\n' && num > 0 && this_line < (sizeof(theline)-1))
4890 {
4891 do {
4892 num = sl_read (fd, &c, 1);
4893 } while (num == 0 && errno == EINTR);
4894 if (num > 0)
4895 theline[this_line] = c;
4896 else
4897 SL_RETURN((0), _("first_hex_block"));
4898 ++this_line;
4899 }
4900 theline[this_line] = '\0';
4901
4902 /* not only 'newline' */
4903 if (this_line > 60)
4904 {
4905 nothex = 0;
4906 i = 0;
4907 while (nothex == 0 && i < (this_line-1))
4908 {
4909 if (! isxdigit((int)theline[i])) nothex = 1;
4910 ++i;
4911 }
4912 if (nothex == 1) retval += this_line;
4913 }
4914 else
4915 {
4916 nothex = 1;
4917 retval += this_line;
4918 }
4919
4920 if (nothex == 0)
4921 {
4922 *max = 0;
4923 do {
4924 do {
4925 num = sl_read (fd, theline, SH_BUFSIZE);
4926 } while (num == 0 && errno == EINTR);
4927 if (num > 0)
4928 {
4929 lnum = (unsigned long) num;
4930 for (i = 0; i < lnum; ++i)
4931 {
4932 c = theline[i];
4933 if (c == '\n' || c == '\t' || c == '\r' || c == ' ')
4934 ;
4935 else if (!isxdigit((int)c))
4936 break;
4937 else
4938 *max += 1;
4939 }
4940 }
4941 } while (num > 0);
4942
4943 *max /= 16;
4944 SL_RETURN((retval), _("first_hex_block"));
4945 }
4946
4947 }
4948 /* SL_RETURN((0), _("first_hex_block")); *//* unreachable */
4949}
4950
4951 /* if !defined(SH_STEALTH_MICRO) */
4952#endif
4953
4954 /* ifdef SH_STEALTH */
4955#endif
4956
4957/*
4958 * anti-debugger code
4959 */
4960#if defined(SCREW_IT_UP)
4961volatile int sh_not_traced = 0;
4962
4963#ifdef HAVE_GETTIMEOFDAY
4964struct timeval save_tv;
4965#endif
4966
4967void sh_sigtrap_handler (int signum)
4968{
4969#ifdef HAVE_GETTIMEOFDAY
4970 struct timeval tv;
4971 long difftv;
4972
4973 gettimeofday(&tv, NULL);
4974 difftv = (tv.tv_sec - save_tv.tv_sec) * 1000000 +
4975 (tv.tv_usec - save_tv.tv_usec);
4976 if (difftv > 500000)
4977 _exit(6);
4978#endif
4979 sh_not_traced += signum;
4980 return;
4981}
4982#endif
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