source: trunk/src/sh_unix.c@ 87

Last change on this file since 87 was 86, checked in by rainer, 18 years ago

More thorough fix for ticket #47, and corresponding regression test.
File size: 103.6 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
28
29#ifdef HAVE_MEMORY_H
30#include <memory.h>
31#endif
32
33#ifdef HAVE_UNISTD_H
34#include <errno.h>
35#include <signal.h>
36#include <pwd.h>
37#include <grp.h>
38#include <sys/types.h>
39#include <sys/stat.h>
40#include <sys/resource.h>
41#include <fcntl.h>
42#include <unistd.h>
43#include <sys/wait.h>
44
45/*********************
46#ifdef HAVE_SYS_VFS_H
47#include <sys/vfs.h>
48#endif
49**********************/
50#endif
51
52#if TIME_WITH_SYS_TIME
53#include <sys/time.h>
54#include <time.h>
55#else
56#if HAVE_SYS_TIME_H
57#include <sys/time.h>
58#else
59#include <time.h>
60#endif
61#endif
62
63#ifdef HAVE_SYS_SELECT_H
64#include <sys/select.h>
65#endif
66
67#ifndef FD_SET
68#define NFDBITS 32
69#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
70#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
71#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
72#endif /* !FD_SET */
73#ifndef FD_SETSIZE
74#define FD_SETSIZE 32
75#endif
76#ifndef FD_ZERO
77#define FD_ZERO(p) memset((char *)(p), '\0', sizeof(*(p)))
78#endif
79
80
81#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
82#include <sys/mman.h>
83#endif
84
85#include "samhain.h"
86#include "sh_error.h"
87#include "sh_unix.h"
88#include "sh_utils.h"
89#include "sh_mem.h"
90#include "sh_hash.h"
91#include "sh_tools.h"
92#include "sh_tiger.h"
93#include "sh_prelink.h"
94
95/* moved here from far below
96 */
97#include <netdb.h>
98
99#define SH_NEED_PWD_GRP
100#define SH_NEED_GETHOSTBYXXX
101#include "sh_static.h"
102
103#ifndef HAVE_LSTAT
104#define lstat stat
105#endif
106
107#if defined(S_IFLNK) && !defined(S_ISLNK)
108#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
109#else
110#if !defined(S_ISLNK)
111#define S_ISLNK(mode) (0)
112#endif
113#endif
114
115#if defined(S_IFSOCK) && !defined(S_ISSOCK)
116#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
117#else
118#if !defined(S_ISSOCK)
119#define S_ISSOCK(mode) (0)
120#endif
121#endif
122
123#if defined(S_IFDOOR) && !defined(S_ISDOOR)
124#define S_ISDOOR(mode) (((mode) & S_IFMT) == S_IFDOOR)
125#else
126#if !defined(S_ISDOOR)
127#define S_ISDOOR(mode) (0)
128#endif
129#endif
130
131#if defined(S_IFPORT) && !defined(S_ISPORT)
132#define S_ISPORT(mode) (((mode) & S_IFMT) == S_IFPORT)
133#else
134#if !defined(S_ISPORT)
135#define S_ISPORT(mode) (0)
136#endif
137#endif
138
139
140#undef FIL__
141#define FIL__ _("sh_unix.c")
142
143unsigned long mask_PRELINK = MASK_PRELINK_;
144unsigned long mask_USER0 = MASK_USER_;
145unsigned long mask_USER1 = MASK_USER_;
146unsigned long mask_USER2 = MASK_USER_;
147unsigned long mask_USER3 = MASK_USER_;
148unsigned long mask_USER4 = MASK_USER_;
149unsigned long mask_ALLIGNORE = MASK_ALLIGNORE_;
150unsigned long mask_ATTRIBUTES = MASK_ATTRIBUTES_;
151unsigned long mask_LOGFILES = MASK_LOGFILES_;
152unsigned long mask_LOGGROW = MASK_LOGGROW_;
153unsigned long mask_READONLY = MASK_READONLY_;
154unsigned long mask_NOIGNORE = MASK_NOIGNORE_;
155
156
157extern char **environ;
158
159int sh_unix_maskreset()
160{
161 mask_PRELINK = MASK_PRELINK_;
162 mask_USER0 = MASK_USER_;
163 mask_USER1 = MASK_USER_;
164 mask_USER2 = MASK_USER_;
165 mask_USER3 = MASK_USER_;
166 mask_USER4 = MASK_USER_;
167 mask_ALLIGNORE = MASK_ALLIGNORE_;
168 mask_ATTRIBUTES = MASK_ATTRIBUTES_;
169 mask_LOGFILES = MASK_LOGFILES_;
170 mask_LOGGROW = MASK_LOGGROW_;
171 mask_READONLY = MASK_READONLY_;
172 mask_NOIGNORE = MASK_NOIGNORE_;
173 return 0;
174}
175
176
177#ifdef SYS_SIGLIST_DECLARED
178/* extern const char * const sys_siglist[]; */
179#else
180char * sh_unix_siglist (int signum)
181{
182 switch (signum)
183 {
184#ifdef SIGHUP
185 case SIGHUP:
186 return _("Hangup");
187#endif
188#ifdef SIGINT
189 case SIGINT:
190 return _("Interrupt");
191#endif
192#ifdef SIGQUIT
193 case SIGQUIT:
194 return _("Quit");
195#endif
196#ifdef SIGILL
197 case SIGILL:
198 return _("Illegal instruction");
199#endif
200#ifdef SIGTRAP
201 case SIGTRAP:
202 return _("Trace/breakpoint trap");
203#endif
204#ifdef SIGABRT
205 case SIGABRT:
206 return _("IOT trap/Abort");
207#endif
208#ifdef SIGBUS
209 case SIGBUS:
210 return _("Bus error");
211#endif
212#ifdef SIGFPE
213 case SIGFPE:
214 return _("Floating point exception");
215#endif
216#ifdef SIGUSR1
217 case SIGUSR1:
218 return _("User defined signal 1");
219#endif
220#ifdef SIGSEGV
221 case SIGSEGV:
222 return _("Segmentation fault");
223#endif
224#ifdef SIGUSR2
225 case SIGUSR2:
226 return _("User defined signal 2");
227#endif
228#ifdef SIGPIPE
229 case SIGPIPE:
230 return _("Broken pipe");
231#endif
232#ifdef SIGALRM
233 case SIGALRM:
234 return _("Alarm clock");
235#endif
236#ifdef SIGTERM
237 case SIGTERM:
238 return _("Terminated");
239#endif
240#ifdef SIGSTKFLT
241 case SIGSTKFLT:
242 return _("Stack fault");
243#endif
244#ifdef SIGCHLD
245 case SIGCHLD:
246 return _("Child exited");
247#endif
248#ifdef SIGCONT
249 case SIGCONT:
250 return _("Continued");
251#endif
252#ifdef SIGSTOP
253 case SIGSTOP:
254 return _("Stopped");
255#endif
256#ifdef SIGTSTP
257 case SIGTSTP:
258 return _("Stop typed at tty");
259#endif
260#ifdef SIGTTIN
261 case SIGTTIN:
262 return _("Stopped (tty input)");
263#endif
264#ifdef SIGTTOU
265 case SIGTTOU:
266 return _("Stopped (tty output)");
267#endif
268#ifdef SIGURG
269 case SIGURG:
270 return _("Urgent condition");
271#endif
272#ifdef SIGXCPU
273 case SIGXCPU:
274 return _("CPU time limit exceeded");
275#endif
276#ifdef SIGXFSZ
277 case SIGXFSZ:
278 return _("File size limit exceeded");
279#endif
280#ifdef SIGVTALRM
281 case SIGVTALRM:
282 return _("Virtual time alarm");
283#endif
284#ifdef SIGPROF
285 case SIGPROF:
286 return _("Profile signal");
287#endif
288#ifdef SIGWINCH
289 case SIGWINCH:
290 return _("Window size changed");
291#endif
292#ifdef SIGIO
293 case SIGIO:
294 return _("Possible I/O");
295#endif
296#ifdef SIGPWR
297 case SIGPWR:
298 return _("Power failure");
299#endif
300#ifdef SIGUNUSED
301 case SIGUNUSED:
302 return _("Unused signal");
303#endif
304 }
305 return _("Unknown");
306}
307#endif
308
309
310/* Log from within a signal handler without using any
311 * functions that are not async signal safe.
312 *
313 * This is the safe_itoa helper function.
314 */
315char * safe_itoa(int i, char * str, int size)
316{
317 unsigned int u;
318 int iisneg = 0;
319 char *p = &str[size-1];
320
321 *p = '\0';
322 if (i < 0) {
323 iisneg = 1;
324 u = ((unsigned int)(-(1+i))) + 1;
325 } else {
326 u = i;
327 }
328 do {
329 --p;
330 *p = '0' + (u % 10);
331 u /= 10;
332 } while (u && (p != str));
333 if ((iisneg == 1) && (p != str)) {
334 --p;
335 *p = '-';
336 }
337 return p;
338}
339
340/* Log from within a signal handler without using any
341 * functions that are not async signal safe.
342 *
343 * This is the safe_logger function.
344 * Arguments: signal (signal number), method (0=logger, 1=stderr), thepid (pid)
345 */
346extern int OnlyStderr;
347
348int safe_logger (int signal, int method, char * details)
349{
350 unsigned int i = 0;
351 int status = -1;
352 struct stat buf;
353 pid_t newpid;
354 char str[128];
355 char * p;
356
357 char l0[64], l1[64], l2[64], l3[64];
358 char a0[32], a1[32], a2[32];
359 char e0[128];
360 char msg[128];
361
362 char * locations[] = { NULL, NULL, NULL, NULL, NULL };
363 char * envp[] = { NULL, NULL };
364 char * argp[] = { NULL, NULL, NULL, NULL, NULL };
365
366 pid_t thepid = getpid();
367
368 if ((sh.flag.isdaemon == S_FALSE) || (OnlyStderr == S_TRUE))
369 method = 1;
370
371 /* seems that solaris cc needs this way of initializing ...
372 */
373 locations[0] = l0;
374 locations[1] = l1;
375 locations[2] = l2;
376 locations[3] = l3;
377
378 envp[0] = e0;
379
380 argp[0] = a0;
381 argp[1] = a1;
382 argp[2] = a2;
383
384 sl_strlcpy(msg, _("samhain["), 128);
385 p = safe_itoa((int) thepid, str, 128);
386 if (p && *p)
387 sl_strlcat(msg, p, 128);
388 if (signal == 0)
389 {
390 if (details == NULL) {
391 sl_strlcat(msg, _("]: out of memory"), 128);
392 } else {
393 sl_strlcat(msg, _("]: "), 128);
394 sl_strlcat(msg, details, 128);
395 }
396 }
397 else
398 {
399 sl_strlcat(msg, _("]: exit on signal "), 128);
400 p = safe_itoa(signal, str, 128);
401 if (p && *p)
402 sl_strlcat(msg, p, 128);
403 }
404
405 if (method == 1) {
406#ifndef STDERR_FILENO
407#define STDERR_FILENO 2
408#endif
409 write(STDERR_FILENO, msg, strlen(msg));
410 write(STDERR_FILENO, "\n", 1);
411 return 0;
412 }
413
414 sl_strlcpy (l0, _("/usr/bin/logger"), 64);
415 sl_strlcpy (l1, _("/usr/sbin/logger"), 64);
416 sl_strlcpy (l2, _("/usr/ucb/logger"), 64);
417 sl_strlcpy (l3, _("/bin/logger"), 64);
418
419 sl_strlcpy (a0, _("logger"), 32);
420 sl_strlcpy (a1, _("-p"), 32);
421 sl_strlcpy (a2, _("daemon.alert"), 32);
422
423 sl_strlcpy (e0,
424 _("PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/ucb:/usr/local/bin"),
425 128);
426
427 while (locations[i] != NULL) {
428 status = stat(locations[i], &buf);
429 if (status == 0)
430 break;
431 ++i;
432 }
433
434 if (locations[i] != NULL) {
435 argp[3] = msg;
436 newpid = fork();
437 if (newpid == 0) {
438 execve(locations[i], argp, envp);
439 _exit(1);
440 }
441 else if (newpid > 0) {
442 waitpid(newpid, &status, WUNTRACED);
443 }
444 }
445 return 0;
446}
447
448void safe_fatal (char * details,
449 char * file, int line)
450{
451 char msg[128];
452 char str[128];
453 char * p;
454 int signal = 0;
455 int method = 0;
456
457 p = safe_itoa((int) line, str, 128);
458 sl_strlcpy(msg, _("FATAL: "), 128);
459 sl_strlcat(msg, file, 128);
460 sl_strlcat(msg, ": ", 128);
461 if (p && (*p)) {
462 sl_strlcat(msg, p , 128);
463 sl_strlcat(msg, ": ", 128);
464 }
465 sl_strlcat(msg, details, 128);
466 safe_logger (signal, method, msg);
467 _exit(EXIT_FAILURE);
468}
469
470extern char sh_sig_msg[64];
471
472volatile int immediate_exit_normal = 0;
473
474#if defined(SA_SIGACTION_WORKS)
475static
476void sh_unix_sigexit (int mysignal, siginfo_t * signal_info, void * signal_add)
477#else
478static
479void sh_unix_sigexit (int mysignal)
480#endif
481{
482
483#if defined(SA_SIGACTION_WORKS)
484 if (signal_info != NULL && signal_info->si_code == SI_USER &&
485 mysignal != SIGTERM && mysignal != SIGINT)
486 {
487 return;
488 }
489
490 /* avoid compiler warning (unused var)
491 */
492 (void) signal_add;
493#endif
494
495 /*
496 * Block re-entry
497 */
498 if (immediate_exit_normal > 0)
499 {
500 ++immediate_exit_normal;
501 if ((skey != NULL) && (immediate_exit_normal == 2))
502 memset (skey, '\0', sizeof(sh_key_t));
503 if (immediate_exit_normal == 2)
504 {
505 chdir ("/");
506 safe_logger (mysignal, 0, NULL);
507 }
508 _exit(mysignal);
509 }
510 else
511 {
512 immediate_exit_normal = 1;
513 }
514
515#ifdef SYS_SIGLIST_DECLARED
516 strncpy (sh_sig_msg, sys_siglist[mysignal], 40);
517#else
518 strncpy (sh_sig_msg, sh_unix_siglist(mysignal), 40);
519#endif
520 sh_sig_msg[63] = '\0';
521
522 ++sig_raised;
523 ++sig_urgent;
524 sig_termfast = 1;
525 return;
526}
527
528volatile int immediate_exit_fast = 0;
529
530#if defined(SA_SIGACTION_WORKS)
531static
532void sh_unix_sigexit_fast (int mysignal, siginfo_t * signal_info,
533 void * signal_add)
534#else
535static
536void sh_unix_sigexit_fast (int mysignal)
537#endif
538{
539#if defined(SA_SIGACTION_WORKS)
540 if (signal_info != NULL && signal_info->si_code == SI_USER)
541 {
542 return;
543 }
544#endif
545
546 /* avoid compiler warning (unused var)
547 */
548#if defined(SA_SIGACTION_WORKS)
549 (void) signal_add;
550#endif
551
552 /* Check whether the heap is ok; otherwise _exit
553 */
554#if !defined(SL_DEBUG)
555 ++immediate_exit_fast;
556 if (skey != NULL && immediate_exit_fast < 2)
557 memset (skey, '\0', sizeof(sh_key_t));
558 if (immediate_exit_fast < 2)
559 safe_logger (mysignal, 0, NULL);
560 _exit(mysignal);
561#else
562
563 /* debug code
564 */
565 if (immediate_exit_fast == 1)
566 {
567 ++immediate_exit_fast;
568 if (skey != NULL)
569 memset (skey, '\0', sizeof(sh_key_t));
570#ifdef WITH_MESSAGE_QUEUE
571 close_ipc ();
572#endif
573 safe_logger (mysignal, 0, NULL);
574 chdir ("/");
575 raise(SIGFPE);
576 }
577 else if (immediate_exit_fast == 2)
578 {
579 chdir ("/");
580 raise(SIGFPE);
581 }
582 else if (immediate_exit_fast != 0)
583 {
584 _exit(mysignal);
585 }
586
587 ++immediate_exit_fast;
588
589 /* The FPE|BUS|SEGV|ILL signals leave the system in an undefined
590 * state, thus it is best to exit immediately.
591 */
592#ifdef SYS_SIGLIST_DECLARED
593 strncpy (sh_sig_msg, sys_siglist[mysignal], 40);
594#else
595 strncpy (sh_sig_msg, sh_unix_siglist(mysignal), 40);
596#endif
597
598 sl_stack_print();
599
600 /* Try to push out an error message.
601 */
602 sh_error_handle ((-1), FIL__, __LINE__, mysignal, MSG_EXIT_NORMAL,
603 sh.prg_name, sh_sig_msg);
604
605 if (skey != NULL)
606 memset (skey, '\0', sizeof(sh_key_t));
607#ifdef WITH_MESSAGE_QUEUE
608 close_ipc ();
609#endif
610
611 chdir ("/");
612 raise(SIGFPE);
613#endif
614}
615
616
617static
618void sh_unix_sigaction (int mysignal)
619{
620 ++sig_raised;
621#ifdef SIGUSR1
622 if (mysignal == SIGUSR1)
623 sig_debug_switch = 1;
624#endif
625#ifdef SIGUSR2
626 if (mysignal == SIGUSR2)
627 {
628 ++sig_suspend_switch;
629 ++sig_urgent;
630 }
631#endif
632#ifdef SIGHUP
633 if (mysignal == SIGHUP)
634 sig_config_read_again = 1;
635#endif
636#ifdef SIGTTOU
637 if (mysignal == SIGTTOU)
638 sig_force_check = 1;
639#endif
640#ifdef SIGABRT
641 if (mysignal == SIGABRT)
642 sig_fresh_trail = 1;
643#endif
644#ifdef SIGQUIT
645 if (mysignal == SIGQUIT)
646 {
647 sig_terminate = 1;
648 ++sig_urgent;
649 }
650#endif
651#ifdef SIGTERM
652 if (mysignal == SIGTERM)
653 {
654 strncpy (sh_sig_msg, _("Terminated"), 40);
655 sig_termfast = 1;
656 ++sig_urgent;
657 }
658#endif
659
660 return;
661}
662
663static
664void sh_unix_siginstall (int goDaemon)
665{
666 struct sigaction act, act_fast, act2, oldact, ignact;
667#if defined (SH_WITH_SERVER)
668 (void) goDaemon;
669#endif
670
671 SL_ENTER(_("sh_unix_siginstall"));
672
673 ignact.sa_handler = SIG_IGN; /* signal action */
674 sigemptyset( &ignact.sa_mask ); /* set an empty mask */
675 ignact.sa_flags = 0; /* init sa_flags */
676
677#if defined(SA_SIGACTION_WORKS)
678 act.sa_sigaction = &sh_unix_sigexit; /* signal action */
679#else
680 act.sa_handler = &sh_unix_sigexit; /* signal action */
681#endif
682
683 sigfillset ( &act.sa_mask ); /* set a full mask */
684
685
686 /* Block all but deadly signals.
687 */
688#ifdef SIGILL
689 sigdelset ( &act.sa_mask, SIGILL );
690#endif
691#ifndef SL_DEBUG
692#ifdef SIGFPE
693 sigdelset ( &act.sa_mask, SIGFPE );
694#endif
695#endif
696#ifdef SIGSEGV
697 sigdelset ( &act.sa_mask, SIGSEGV );
698#endif
699#ifdef SIGBUS
700 sigdelset ( &act.sa_mask, SIGBUS );
701#endif
702
703#if defined(SA_SIGACTION_WORKS)
704 act_fast.sa_sigaction = &sh_unix_sigexit_fast; /* signal action */
705#else
706 act_fast.sa_handler = &sh_unix_sigexit_fast; /* signal action */
707#endif
708
709 sigfillset ( &act_fast.sa_mask ); /* set a full mask */
710
711#ifdef SIGILL
712 sigdelset ( &act_fast.sa_mask, SIGILL );
713#endif
714#ifndef SL_DEBUG
715#ifdef SIGFPE
716 sigdelset ( &act_fast.sa_mask, SIGFPE );
717#endif
718#endif
719#ifdef SIGSEGV
720 sigdelset ( &act_fast.sa_mask, SIGSEGV );
721#endif
722#ifdef SIGBUS
723 sigdelset ( &act_fast.sa_mask, SIGBUS );
724#endif
725
726
727 /* Use siginfo to verify origin of signal, if possible.
728 */
729#if defined(SA_SIGACTION_WORKS)
730 act.sa_flags = SA_SIGINFO;
731 act_fast.sa_flags = SA_SIGINFO;
732#else
733 act.sa_flags = 0;
734 act_fast.sa_flags = 0;
735#endif
736
737 /* Do not block the signal from being received in its handler ...
738 * (is this a good or a bad idea ??).
739 */
740#if defined(SA_NOMASK)
741 act_fast.sa_flags |= SA_NOMASK;
742#elif defined(SA_NODEFER)
743 act_fast.sa_flags |= SA_NODEFER;
744#endif
745
746
747 act2.sa_handler = &sh_unix_sigaction; /* signal action */
748 sigemptyset( &act2.sa_mask ); /* set an empty mask */
749 act2.sa_flags = 0; /* init sa_flags */
750
751 /* signals to control the daemon */
752
753#ifdef SIGHUP
754 retry_sigaction(FIL__, __LINE__, SIGHUP, &act2, &oldact);
755#endif
756#ifdef SIGABRT
757 retry_sigaction(FIL__, __LINE__, SIGABRT, &act2, &oldact);
758#endif
759#ifdef SIGUSR1
760 retry_sigaction(FIL__, __LINE__, SIGUSR1, &act2, &oldact);
761#endif
762#ifdef SIGUSR2
763 retry_sigaction(FIL__, __LINE__, SIGUSR2, &act2, &oldact);
764#endif
765#ifdef SIGQUIT
766 retry_sigaction(FIL__, __LINE__, SIGQUIT, &act2, &oldact);
767#endif
768#ifdef SIGTERM
769 retry_sigaction(FIL__, __LINE__, SIGTERM, &act, &oldact);
770#endif
771
772 /* fatal signals that may cause termination */
773
774#ifdef SIGILL
775 retry_sigaction(FIL__, __LINE__, SIGILL, &act_fast, &oldact);
776#endif
777#ifndef SL_DEBUG
778#ifdef SIGFPE
779 retry_sigaction(FIL__, __LINE__, SIGFPE, &act_fast, &oldact);
780#endif
781#endif
782#ifdef SIGSEGV
783 retry_sigaction(FIL__, __LINE__, SIGSEGV, &act_fast, &oldact);
784#endif
785#ifdef SIGBUS
786 retry_sigaction(FIL__, __LINE__, SIGBUS, &act_fast, &oldact);
787#endif
788
789 /* other signals */
790
791#ifdef SIGINT
792 retry_sigaction(FIL__, __LINE__, SIGINT, &act, &oldact);
793#endif
794#ifdef SIGPIPE
795 retry_sigaction(FIL__, __LINE__, SIGPIPE, &act, &oldact);
796#endif
797#ifdef SIGALRM
798 retry_sigaction(FIL__, __LINE__, SIGALRM, &ignact, &oldact);
799#endif
800#ifdef SIGTSTP
801 retry_sigaction(FIL__, __LINE__, SIGTSTP, &ignact, &oldact);
802#endif
803#ifdef SIGTTIN
804 retry_sigaction(FIL__, __LINE__, SIGTTIN, &ignact, &oldact);
805#endif
806#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
807#ifdef SIGTTOU
808 if (goDaemon == 1)
809 retry_sigaction(FIL__, __LINE__, SIGTTOU, &act2, &oldact);
810 else
811 retry_sigaction(FIL__, __LINE__, SIGTTOU, &ignact, &oldact);
812#endif
813#else
814#ifdef SIGTTOU
815 retry_sigaction(FIL__, __LINE__, SIGTTOU, &ignact, &oldact);
816#endif
817#endif
818
819#ifdef SIGTRAP
820#if !defined(SCREW_IT_UP)
821 retry_sigaction(FIL__, __LINE__, SIGTRAP, &act, &oldact);
822#endif
823#endif
824
825#ifdef SIGPOLL
826 retry_sigaction(FIL__, __LINE__, SIGPOLL, &ignact, &oldact);
827#endif
828#if defined(SIGPROF) && !defined(SH_PROFILE)
829 retry_sigaction(FIL__, __LINE__, SIGPROF, &ignact, &oldact);
830#endif
831#ifdef SIGSYS
832 retry_sigaction(FIL__, __LINE__, SIGSYS, &act, &oldact);
833#endif
834#ifdef SIGURG
835 retry_sigaction(FIL__, __LINE__, SIGURG, &ignact, &oldact);
836#endif
837#if defined(SIGVTALRM) && !defined(SH_PROFILE)
838 retry_sigaction(FIL__, __LINE__, SIGVTALRM, &ignact, &oldact);
839#endif
840#ifdef SIGXCPU
841 retry_sigaction(FIL__, __LINE__, SIGXCPU, &act, &oldact);
842#endif
843#ifdef SIGXFSZ
844 retry_sigaction(FIL__, __LINE__, SIGXFSZ, &act, &oldact);
845#endif
846
847#ifdef SIGEMT
848 retry_sigaction(FIL__, __LINE__, SIGEMT, &ignact, &oldact);
849#endif
850#ifdef SIGSTKFLT
851 retry_sigaction(FIL__, __LINE__, SIGSTKFLT, &act, &oldact);
852#endif
853#ifdef SIGIO
854 retry_sigaction(FIL__, __LINE__, SIGIO, &ignact, &oldact);
855#endif
856#ifdef SIGPWR
857 retry_sigaction(FIL__, __LINE__, SIGPWR, &act, &oldact);
858#endif
859
860#ifdef SIGLOST
861 retry_sigaction(FIL__, __LINE__, SIGLOST, &ignact, &oldact);
862#endif
863#ifdef SIGUNUSED
864 retry_sigaction(FIL__, __LINE__, SIGUNUSED, &ignact, &oldact);
865#endif
866
867 SL_RET0(_("sh_unix_siginstall"));
868}
869
870/* ---------------------------------------------------------------- */
871
872/* checksum the own binary
873 */
874int sh_unix_self_hash (const char * c)
875{
876 char message[512];
877
878 SL_ENTER(_("sh_unix_self_hash"));
879
880 if (c == NULL)
881 {
882 sh.exec.path[0] = '\0';
883 SL_RETURN((0), _("sh_unix_self_hash"));
884 }
885 sl_strlcpy(sh.exec.path, c, SH_PATHBUF);
886
887 sl_strlcpy(sh.exec.hash,
888 sh_tiger_hash (c, TIGER_FILE, 0),
889 KEY_LEN+1);
890 sl_snprintf(message, 512, _("%s has checksum: %s"),
891 sh.exec.path, sh.exec.hash);
892 message[511] = '\0';
893 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
894 message, _("sh_unix_self_hash"));
895 if (0 == sl_strcmp(sh.exec.hash,
896 _("000000000000000000000000000000000000000000000000")
897 ))
898 {
899 dlog(1, FIL__, __LINE__,
900 _("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"),
901 sh.exec.path, sl_get_errmsg(), (int) sl_ret_euid());
902 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_NOACCESS,
903 (long) sh.real.uid, c);
904 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
905 }
906 SL_RETURN((0), _("sh_unix_self_hash"));
907}
908
909int sh_unix_self_check ()
910{
911 char newhash[KEY_LEN+1];
912 char message[512];
913
914 SL_ENTER(_("sh_unix_self_check"));
915 if (sh.exec.path == NULL || sh.exec.path[0] == '\0')
916 SL_RETURN((0), _("sh_unix_self_check"));
917
918 sl_strlcpy(newhash, sh_tiger_hash (sh.exec.path, TIGER_FILE, 0), KEY_LEN+1);
919 if (0 == sl_strncmp(sh.exec.hash,
920 newhash,
921 KEY_LEN))
922 SL_RETURN((0), _("sh_unix_self_check"));
923
924
925 dlog(1, FIL__, __LINE__,
926 _("The checksum of the executable: %s has changed since startup (%s -> %s).\n"),
927 sh.exec.path, sh.exec.hash, newhash);
928
929 sl_snprintf(message, 512,
930 _("The checksum of %s has changed since startup (%s -> %s)"),
931 sh.exec.path, sh.exec.hash, newhash);
932 message[511] = '\0';
933
934 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
935 message, _("sh_unix_self_check"));
936 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_E_AUTH,
937 sh.exec.path);
938 SL_RETURN((-1), _("sh_unix_self_check"));
939}
940
941
942/* ---------------------------------------------------------------- */
943
944
945/* added Tue Feb 22 10:36:44 NFT 2000 Rainer Wichmann */
946static int tf_add_trusted_user_int(const char * c)
947{
948 register struct passwd * w;
949 int count;
950 uid_t pwid = (uid_t)-1;
951
952 SL_ENTER(_("tf_add_trusted_user_int"));
953
954 /* First check for a user name.
955 */
956 if ((w = sh_getpwnam(c)) != NULL && ((pwid = w->pw_uid) > 0))
957 goto succe;
958
959 /* Failed, so check for a numerical value.
960 */
961 pwid = strtol(c, (char **)NULL, 10);
962 if (pwid > 0 && pwid < 65535)
963 goto succe;
964
965 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
966 _("add trusted user"), c);
967 SL_RETURN((-1), _("tf_add_trusted_user_int"));
968
969 succe:
970 count = sl_trust_add_user(pwid);
971 SL_RETURN((count), _("tf_add_trusted_user_int"));
972}
973
974int tf_add_trusted_user(const char * c)
975{
976 int i;
977 char * q;
978 char * p = sh_util_strdup (c);
979
980 SL_ENTER(_("tf_add_trusted_user"));
981
982 q = strtok(p, ", \t");
983 if (!q)
984 {
985 SH_FREE(p);
986 SL_RETURN((-1), _("tf_add_trusted_user"));
987 }
988 while (q)
989 {
990 i = tf_add_trusted_user_int(q);
991 if (SL_ISERROR(i))
992 {
993 SH_FREE(p);
994 SL_RETURN((i), _("tf_add_trusted_user"));
995 }
996 q = strtok(NULL, ", \t");
997 }
998 SH_FREE(p);
999 SL_RETURN((0), _("tf_add_trusted_user"));
1000}
1001
1002extern uid_t sl_trust_baduid();
1003extern gid_t sl_trust_badgid();
1004
1005#if defined(HOST_IS_CYGWIN) || defined(__cygwin__) || defined(__CYGWIN32__) || defined(__CYGWIN__)
1006int tf_trust_check (char * file, int mode)
1007{
1008 (void) file;
1009 (void) mode;
1010 return 0;
1011}
1012#else
1013int tf_trust_check (char * file, int mode)
1014{
1015 char * tmp;
1016 char * tmp2;
1017 char * p;
1018 int status;
1019 int level;
1020 uid_t ff_euid;
1021
1022 SL_ENTER(_("tf_trust_check"));
1023
1024 if (mode == SL_YESPRIV)
1025 sl_get_euid(&ff_euid);
1026 else
1027 sl_get_ruid(&ff_euid);
1028
1029#if defined(SH_WITH_SERVER)
1030 if (0 == sl_ret_euid()) /* privileges not dropped yet */
1031 {
1032 struct passwd * tempres = sh_getpwnam(DEFAULT_IDENT);
1033
1034 if (!tempres)
1035 {
1036 dlog(1, FIL__, __LINE__,
1037 _("User %s does not exist. Please add the user to your system.\n"),
1038 DEFAULT_IDENT);
1039 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
1040 }
1041 ff_euid = tempres->pw_uid;
1042 }
1043#endif
1044
1045 status = sl_trustfile_euid(file, ff_euid);
1046
1047 if ( SL_ENONE != status)
1048 {
1049 if (status == SL_ESTAT)
1050 level = SH_ERR_ALL;
1051 else
1052 level = SH_ERR_ERR;
1053
1054 tmp = sh_util_safe_name (file);
1055 p = sl_trust_errfile();
1056 if (p && *p != '\0')
1057 {
1058 tmp2 = sh_util_safe_name (sl_trust_errfile());
1059 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST2,
1060 sl_error_string(status), tmp, tmp2);
1061 SH_FREE(tmp2);
1062 }
1063 else
1064 {
1065 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST1,
1066 sl_error_string(status), tmp);
1067 }
1068 SH_FREE(tmp);
1069
1070 if (status == SL_EBADUID || status == SL_EBADGID ||
1071 status == SL_EBADOTH || status == SL_ETRUNC ||
1072 status == SL_EINTERNAL )
1073 {
1074 switch (status) {
1075 case SL_EINTERNAL:
1076 dlog(1, FIL__, __LINE__,
1077 _("An internal error occured in the trustfile function.\n"));
1078 break;
1079 case SL_ETRUNC:
1080 tmp = sh_util_safe_name (file);
1081 dlog(1, FIL__, __LINE__,
1082 _("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"),
1083 tmp);
1084 SH_FREE(tmp);
1085 break;
1086 case SL_EBADOTH:
1087 tmp = sh_util_safe_name (file);
1088 p = sl_trust_errfile();
1089 dlog(1, FIL__, __LINE__,
1090 _("The path element: %s\nin the filename: %s is world writeable.\n"),
1091 p, tmp);
1092 SH_FREE(tmp);
1093 break;
1094 case SL_EBADUID:
1095 tmp = sh_util_safe_name (file);
1096 p = sl_trust_errfile();
1097 dlog(1, FIL__, __LINE__,
1098 _("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"),
1099 (UID_CAST)sl_trust_baduid(), p, tmp);
1100 SH_FREE(tmp);
1101 break;
1102 case SL_EBADGID:
1103 tmp = sh_util_safe_name (file);
1104 p = sl_trust_errfile();
1105 dlog(1, FIL__, __LINE__,
1106 _("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"),
1107 p, tmp, (UID_CAST)sl_trust_badgid(),
1108 (UID_CAST)sl_trust_baduid());
1109 SH_FREE(tmp);
1110 break;
1111 default:
1112 break;
1113 }
1114
1115 SL_RETURN((-1), _("tf_trust_check"));
1116 }
1117 }
1118
1119 SL_RETURN((0), _("tf_trust_check"));
1120}
1121#endif
1122
1123#ifdef HAVE_INITGROUPS
1124#ifdef HOST_IS_OSF
1125int sh_unix_initgroups ( char * in_user, gid_t in_gid)
1126#else
1127int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1128#endif
1129{
1130 int status = -1;
1131 status = sh_initgroups (in_user, in_gid);
1132 if (status < 0)
1133 {
1134 if (errno == EPERM)
1135 return 0;
1136 if (errno == EINVAL)
1137 return 0;
1138 return -1;
1139 }
1140 return 0;
1141}
1142#else
1143int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1144{
1145 (void) in_user;
1146 (void) in_gid;
1147 return 0;
1148}
1149#endif
1150
1151#ifdef HAVE_INITGROUPS
1152char * sh_unix_getUIDname (int level, uid_t uid);
1153int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1154{
1155 int status = -1;
1156 char * user = NULL;
1157
1158 SL_ENTER(_("sh_unix_initgroups2"));
1159
1160 user = sh_unix_getUIDname (SH_ERR_ERR, in_pid);
1161 if (user == NULL)
1162 SL_RETURN((-1), _("sh_unix_initgroups2"));
1163 status = sh_initgroups (user, in_gid);
1164 if (status < 0)
1165 {
1166 if (errno == EPERM)
1167 status = 0;
1168 if (errno == EINVAL)
1169 status = 0;
1170 }
1171 SL_RETURN((status), _("sh_unix_initgroups2"));
1172}
1173#else
1174int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1175{
1176 (void) in_pid;
1177 (void) in_gid;
1178 return 0;
1179}
1180#endif
1181
1182void sh_unix_closeall (int fd, int except)
1183{
1184 int fdx = fd;
1185#ifdef _SC_OPEN_MAX
1186 int fdlimit = sysconf (_SC_OPEN_MAX);
1187#else
1188#ifdef OPEN_MAX
1189 int fdlimit = OPEN_MAX;
1190#else
1191 int fdlimit = _POSIX_OPEN_MAX;
1192#endif
1193#endif
1194
1195 SL_ENTER(_("sh_unix_closeall"));
1196
1197 /* can't happen - so fix it :-(
1198 */
1199 if (fdlimit < 0)
1200 fdlimit = 20; /* POSIX lower limit */
1201
1202 if (fdlimit > 65536)
1203 fdlimit = 65536;
1204
1205 /* Close everything from fd (inclusive) up to fdlimit (exclusive).
1206 */
1207 while (fd < fdlimit)
1208 {
1209 if (fd == except)
1210 fd++;
1211 else if (slib_do_trace != 0 && fd == slib_trace_fd)
1212 fd++;
1213 else
1214 close(fd++);
1215 }
1216
1217 sl_dropall (fdx, except);
1218
1219 SL_RET0(_("sh_unix_closeall"));
1220}
1221
1222static void sh_unix_setlimits(void)
1223{
1224 struct rlimit limits;
1225
1226 SL_ENTER(_("sh_unix_setlimits"));
1227
1228 limits.rlim_cur = RLIM_INFINITY;
1229 limits.rlim_max = RLIM_INFINITY;
1230
1231#ifdef RLIMIT_CPU
1232 setrlimit (RLIMIT_CPU, &limits);
1233#endif
1234#ifdef RLIMIT_FSIZE
1235 setrlimit (RLIMIT_FSIZE, &limits);
1236#endif
1237#ifdef RLIMIT_DATA
1238 setrlimit (RLIMIT_DATA, &limits);
1239#endif
1240#ifdef RLIMIT_STACK
1241 setrlimit (RLIMIT_STACK, &limits);
1242#endif
1243#ifdef RLIMIT_RSS
1244 setrlimit (RLIMIT_RSS, &limits);
1245#endif
1246#ifdef RLIMIT_NPROC
1247 setrlimit (RLIMIT_NPROC, &limits);
1248#endif
1249#ifdef RLIMIT_MEMLOCK
1250 setrlimit (RLIMIT_MEMLOCK, &limits);
1251#endif
1252
1253#if !defined(SL_DEBUG)
1254 /* no core dumps
1255 */
1256 limits.rlim_cur = 0;
1257 limits.rlim_max = 0;
1258#ifdef RLIMIT_CORE
1259 setrlimit (RLIMIT_CORE, &limits);
1260#endif
1261#else
1262#ifdef RLIMIT_CORE
1263 setrlimit (RLIMIT_CORE, &limits);
1264#endif
1265#endif
1266
1267 limits.rlim_cur = 1024;
1268 limits.rlim_max = 1024;
1269
1270#if defined(RLIMIT_NOFILE)
1271 setrlimit (RLIMIT_NOFILE, &limits);
1272#elif defined(RLIMIT_OFILE)
1273 setrlimit (RLIMIT_OFILE, &limits);
1274#endif
1275
1276 SL_RET0(_("sh_unix_setlimits"));
1277}
1278
1279static void sh_unix_copyenv(void)
1280{
1281 char ** env0 = environ;
1282 char ** env1;
1283 int envlen = 0;
1284 size_t len;
1285
1286 SL_ENTER(_("sh_unix_copyenv"));
1287
1288 while (env0 != NULL && env0[envlen] != NULL) {
1289 /* printf("%2d: %s\n", envlen, env0[envlen]); */
1290 ++envlen;
1291 }
1292 ++envlen;
1293
1294 /* printf("-> %2d: slots allocated\n", envlen); */
1295 env1 = malloc (sizeof(char *) * envlen); /* only once */
1296 if (env1 == NULL)
1297 {
1298 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1299 SL_RET0(_("sh_unix_copyenv"));
1300 }
1301 env0 = environ;
1302 envlen = 0;
1303
1304 while (env0 != NULL && env0[envlen] != NULL) {
1305 len = strlen(env0[envlen]) + 1;
1306 env1[envlen] = malloc (len); /* only once */
1307 if (env1[envlen] == NULL)
1308 {
1309 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1310 SL_RET0(_("sh_unix_copyenv"));
1311 }
1312 sl_strlcpy(env1[envlen], env0[envlen], len);
1313 ++envlen;
1314 }
1315 env1[envlen] = NULL;
1316
1317 environ = env1;
1318 SL_RET0(_("sh_unix_copyenv"));
1319}
1320
1321/* delete all environment variables
1322 */
1323static void sh_unix_zeroenv(void)
1324{
1325 char * c;
1326 char ** env;
1327
1328 SL_ENTER(_("sh_unix_zeroenv"));
1329
1330 sh_unix_copyenv();
1331 env = environ;
1332
1333 while (env != NULL && *env != NULL) {
1334 c = strchr ((*env), '=');
1335#ifdef WITH_MYSQL
1336 /*
1337 * Skip the MYSQL_UNIX_PORT environment variable; MySQL may need it.
1338 */
1339 if (0 == sl_strncmp((*env), _("MYSQL_UNIX_PORT="), 16))
1340 {
1341 ++(env);
1342 continue;
1343 }
1344 if (0 == sl_strncmp((*env), _("MYSQL_TCP_PORT="), 15))
1345 {
1346 ++(env);
1347 continue;
1348 }
1349 if (0 == sl_strncmp((*env), _("MYSQL_HOME="), 11))
1350 {
1351 ++(env);
1352 continue;
1353 }
1354#endif
1355#ifdef WITH_ORACLE
1356 /*
1357 * Skip the ORACLE_HOME environment variable; Oracle may need it.
1358 */
1359 if (0 == sl_strncmp((*env), _("ORACLE_HOME="), 12))
1360 {
1361 ++(env);
1362 continue;
1363 }
1364#endif
1365 /*
1366 * Skip the TZ environment variable.
1367 */
1368 if (0 == sl_strncmp((*env), _("TZ="), 3))
1369 {
1370 ++(env);
1371 continue;
1372 }
1373 ++(env);
1374 if (c != NULL)
1375 {
1376 ++c;
1377 while ((*c) != '\0') {
1378 (*c) = '\0';
1379 ++c;
1380 }
1381 }
1382 }
1383
1384 SL_RET0(_("sh_unix_zeroenv"));
1385}
1386
1387
1388static void sh_unix_resettimer(void)
1389{
1390 struct itimerval this_timer;
1391
1392 SL_ENTER(_("sh_unix_resettimer"));
1393
1394 this_timer.it_value.tv_sec = 0;
1395 this_timer.it_value.tv_usec = 0;
1396
1397 this_timer.it_interval.tv_sec = 0;
1398 this_timer.it_interval.tv_usec = 0;
1399
1400 setitimer(ITIMER_REAL, &this_timer, NULL);
1401#if !defined(SH_PROFILE)
1402 setitimer(ITIMER_VIRTUAL, &this_timer, NULL);
1403 setitimer(ITIMER_PROF, &this_timer, NULL);
1404#endif
1405
1406 SL_RET0(_("sh_unix_resettimer"));
1407}
1408
1409static void sh_unix_resetsignals(void)
1410{
1411 int sig_num;
1412#ifdef NSIG
1413 int max_sig = NSIG;
1414#else
1415 int max_sig = 255;
1416#endif
1417 int test;
1418 struct sigaction act, oldact;
1419 int status;
1420
1421 sigset_t set_proc;
1422
1423 SL_ENTER(_("sh_unix_resetsignals"));
1424 /*
1425 * Reset the current signal mask (inherited from parent process).
1426 */
1427
1428 sigfillset(&set_proc);
1429
1430 do {
1431 errno = 0;
1432 test = sigprocmask(SIG_UNBLOCK, &set_proc, NULL);
1433 } while (test < 0 && errno == EINTR);
1434
1435 /*
1436 * Reset signal handling.
1437 */
1438
1439 act.sa_handler = SIG_DFL; /* signal action */
1440 sigemptyset( &act.sa_mask ); /* set an empty mask */
1441 act.sa_flags = 0; /* init sa_flags */
1442
1443 for (sig_num = 1; sig_num <= max_sig; ++sig_num)
1444 {
1445#if !defined(SH_PROFILE)
1446 test = retry_sigaction(FIL__, __LINE__, sig_num, &act, &oldact);
1447#else
1448 test = 0;
1449#endif
1450 if ((test == -1) && (errno != EINVAL))
1451 {
1452 status = errno;
1453 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_SIG,
1454 sh_error_message (status), sig_num);
1455 }
1456 }
1457
1458 SL_RET0(_("sh_unix_resetsignals"));
1459}
1460
1461/* Get the local hostname (FQDN)
1462 */
1463#include <sys/socket.h>
1464
1465/* Required for BSD
1466 */
1467#ifdef HAVE_NETINET_IN_H
1468#include <netinet/in.h>
1469#endif
1470
1471#include <arpa/inet.h>
1472
1473char * sh_unix_h_name (struct hostent * host_entry)
1474{
1475 char ** p;
1476 if (strchr(host_entry->h_name, '.')) {
1477 return host_entry->h_name;
1478 } else {
1479 for (p = host_entry->h_aliases; *p; ++p) {
1480 if (strchr(*p, '.'))
1481 return *p;
1482 }
1483 }
1484 return host_entry->h_name;
1485}
1486
1487/* uname() on FreeBSD is broken, because the 'nodename' buf is too small
1488 * to hold a valid (leftmost) domain label.
1489 */
1490#if defined(HAVE_UNAME) && !defined(HOST_IS_FREEBSD)
1491#include <sys/utsname.h>
1492void sh_unix_localhost()
1493{
1494 struct utsname buf;
1495 struct hostent * he1;
1496 int i;
1497 int ddot = 0;
1498 int len;
1499 char * p;
1500 char hostname[256];
1501
1502
1503 SL_ENTER(_("sh_unix_localhost"));
1504
1505 (void) uname (&buf);
1506 /* flawfinder: ignore */ /* ff bug, ff sees system() */
1507 sl_strlcpy (sh.host.system, buf.sysname, SH_MINIBUF);
1508 sl_strlcpy (sh.host.release, buf.release, SH_MINIBUF);
1509 sl_strlcpy (sh.host.machine, buf.machine, SH_MINIBUF);
1510
1511 /* Workaround for cases where nodename could be
1512 * a truncated FQDN.
1513 */
1514 if (strlen(buf.nodename) == (sizeof(buf.nodename)-1))
1515 {
1516 p = strchr(buf.nodename, '.');
1517 if (NULL != p) {
1518 *p = '\0';
1519 sl_strlcpy(hostname, buf.nodename, 256);
1520 } else {
1521#ifdef HAVE_GETHOSTNAME
1522 if (0 != gethostname(hostname, 256))
1523 {
1524 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1525 _("nodename returned by uname may be truncated"),
1526 _("sh_unix_localhost"));
1527 sl_strlcpy (hostname, buf.nodename, 256);
1528 }
1529 else
1530 {
1531 hostname[255] = '\0';
1532 }
1533#else
1534 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1535 _("nodename returned by uname may be truncated"),
1536 _("sh_unix_localhost"));
1537 sl_strlcpy(hostname, buf.nodename, 256);
1538#endif
1539 }
1540 }
1541 else
1542 {
1543 sl_strlcpy(hostname, buf.nodename, 256);
1544 }
1545
1546 he1 = sh_gethostbyname(hostname);
1547
1548 if (he1 == NULL)
1549 {
1550 dlog(1, FIL__, __LINE__,
1551 _("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"),
1552 hostname);
1553 sl_strlcpy (sh.host.name, hostname, SH_PATHBUF);
1554 }
1555 else
1556 {
1557 sl_strlcpy (sh.host.name, sh_unix_h_name(he1), SH_PATHBUF);
1558 }
1559
1560
1561 /* check whether it looks like a FQDN
1562 */
1563 len = sl_strlen(sh.host.name);
1564 for (i = 0; i < len; ++i)
1565 if (sh.host.name[i] == '.') ++ddot;
1566
1567 if (ddot == 0 && he1 != NULL)
1568 {
1569 dlog(1, FIL__, __LINE__,
1570 _("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"),
1571 hostname, sh.host.name);
1572 sl_strlcpy (sh.host.name,
1573 inet_ntoa (*(struct in_addr *) he1->h_addr),
1574 SH_PATHBUF);
1575 SL_RET0(_("sh_unix_localhost"));
1576 }
1577
1578 if (is_numeric(sh.host.name))
1579 {
1580 dlog(1, FIL__, __LINE__,
1581 _("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"),
1582 hostname, sh.host.name);
1583 }
1584
1585 SL_RET0(_("sh_unix_localhost"));
1586}
1587#else
1588void sh_unix_localhost()
1589{
1590 struct hostent * he1;
1591 int i;
1592 int ddot = 0;
1593 int len;
1594 char hostname[1024];
1595
1596
1597 SL_ENTER(_("sh_unix_localhost"));
1598
1599 (void) gethostname (hostname, 1024);
1600 hostname[1023] = '\0';
1601 he1 = sh_gethostbyname(hostname);
1602
1603 if (he1 != NULL)
1604 {
1605 sl_strlcpy (sh.host.name, sh_unix_h_name(he1), SH_PATHBUF);
1606 }
1607 else
1608 {
1609 dlog(1, FIL__, __LINE__,
1610 _("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"),
1611 hostname);
1612 sl_strlcpy (sh.host.name, _("localhost"), SH_PATHBUF);
1613 SL_RET0(_("sh_unix_localhost"));
1614 }
1615
1616 /* check whether it looks like a FQDN
1617 */
1618 len = sl_strlen(sh.host.name);
1619 for (i = 0; i < len; ++i)
1620 if (sh.host.name[i] == '.') ++ddot;
1621 if (ddot == 0)
1622 {
1623 dlog(1, FIL__, __LINE__,
1624 _("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"),
1625 hostname, sh.host.name);
1626 sl_strlcpy (sh.host.name,
1627 inet_ntoa (*(struct in_addr *) he1->h_addr),
1628 SH_PATHBUF);
1629 SL_RET0(_("sh_unix_localhost"));
1630 }
1631
1632 if (is_numeric(sh.host.name))
1633 {
1634 dlog(1, FIL__, __LINE__,
1635 _("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"),
1636 hostname, sh.host.name);
1637 }
1638
1639 SL_RET0(_("sh_unix_localhost"));
1640}
1641#endif
1642
1643
1644void sh_unix_memlock()
1645{
1646 SL_ENTER(_("sh_unix_memlock"));
1647
1648 /* do this before dropping privileges
1649 */
1650#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
1651 if (skey->mlock_failed == SL_FALSE)
1652 {
1653 if ( (-1) == sh_unix_mlock( FIL__, __LINE__,
1654 (char *) skey, sizeof (sh_key_t)) )
1655 {
1656 skey->mlock_failed = SL_TRUE;
1657 }
1658 }
1659#else
1660 if (skey->mlock_failed == SL_FALSE)
1661 {
1662 skey->mlock_failed = SL_TRUE;
1663 }
1664#endif
1665
1666 SL_RET0(_("sh_unix_memlock"));
1667}
1668
1669#ifdef SH_WITH_SERVER
1670char * chroot_dir = NULL;
1671
1672int sh_unix_set_chroot(const char * str)
1673{
1674 size_t len;
1675 static int block = 0;
1676
1677 if (block == 1)
1678 return 0;
1679
1680 if (str && *str == '/')
1681 {
1682 len = strlen(str) + 1;
1683 chroot_dir = malloc(strlen(str) + 1); /* only once */
1684 if (!chroot_dir)
1685 {
1686 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1687 return 1;
1688 }
1689 sl_strlcpy(chroot_dir, str, len);
1690 block = 1;
1691 return 0;
1692 }
1693 return 1;
1694}
1695
1696int sh_unix_chroot()
1697{
1698 int status;
1699
1700 if (chroot_dir != NULL)
1701 {
1702 status = retry_aud_chdir(FIL__, __LINE__, chroot_dir);
1703 if ( (-1) == status )
1704 {
1705 status = errno;
1706 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
1707 sh_error_message (status), chroot_dir);
1708 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1709 }
1710 /* flawfinder: ignore */
1711 return (chroot(chroot_dir));
1712 }
1713 return 0;
1714}
1715/* #ifdef SH_WITH_SERVER */
1716#else
1717int sh_unix_chroot() { return 0; }
1718#endif
1719
1720/* daemon mode
1721 */
1722static int block_setdeamon = 0;
1723
1724int sh_unix_setdeamon(const char * dummy)
1725{
1726 int res = 0;
1727
1728 SL_ENTER(_("sh_unix_setdeamon"));
1729
1730 if (block_setdeamon != 0)
1731 SL_RETURN((0),_("sh_unix_setdeamon"));
1732
1733 if (dummy == NULL)
1734 sh.flag.isdaemon = ON;
1735 else
1736 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
1737
1738 if (sh.flag.opts == S_TRUE)
1739 block_setdeamon = 1;
1740
1741 SL_RETURN(res, _("sh_unix_setdeamon"));
1742}
1743#if defined(HAVE_LIBPRELUDE)
1744#include "sh_prelude.h"
1745#endif
1746
1747int sh_unix_setnodeamon(const char * dummy)
1748{
1749 int res = 0;
1750
1751 SL_ENTER(_("sh_unix_setnodeamon"));
1752
1753 if (block_setdeamon != 0)
1754 SL_RETURN((0),_("sh_unix_setmodeamon"));
1755
1756 if (dummy == NULL)
1757 sh.flag.isdaemon = OFF;
1758 else
1759 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
1760
1761 if (sh.flag.opts == S_TRUE)
1762 block_setdeamon = 1;
1763
1764 SL_RETURN(res, _("sh_unix_setnodeamon"));
1765}
1766
1767int sh_unix_init(int goDaemon)
1768{
1769 int status;
1770 uid_t uid;
1771 pid_t oldpid = getpid();
1772#if defined(SH_WITH_SERVER)
1773 extern int sh_socket_open_int ();
1774#endif
1775
1776 SL_ENTER(_("sh_unix_init"));
1777
1778 /* fork twice, exit the parent process
1779 */
1780 if (goDaemon == 1) {
1781
1782 switch (aud_fork(FIL__, __LINE__)) {
1783 case 0: break; /* child process continues */
1784 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
1785 default: aud__exit(FIL__, __LINE__, 0); /* parent process exits */
1786 }
1787
1788 /* Child processes do not inherit page locks across a fork.
1789 * Error in next fork would return in this (?) thread of execution.
1790 */
1791 sh_unix_memlock();
1792
1793 setsid(); /* should not fail */
1794
1795 switch (aud_fork(FIL__, __LINE__)) {
1796 case 0: break; /* child process continues */
1797 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
1798 default: aud__exit(FIL__, __LINE__, 0); /* parent process exits */
1799 }
1800
1801 /* Child processes do not inherit page locks across a fork.
1802 */
1803 sh_unix_memlock();
1804
1805 } else {
1806 setsid(); /* should not fail */
1807 }
1808
1809 /* set working directory
1810 */
1811#ifdef SH_PROFILE
1812 status = 0;
1813#else
1814 status = retry_aud_chdir(FIL__, __LINE__, "/");
1815#endif
1816 if ( (-1) == status )
1817 {
1818 status = errno;
1819 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
1820 sh_error_message (status), "/");
1821 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1822 }
1823
1824 /* reset timers
1825 */
1826 sh_unix_resettimer();
1827
1828 /* signal handlers
1829 */
1830 sh_unix_resetsignals();
1831#if defined(SCREW_IT_UP)
1832 sh_sigtrap_prepare();
1833#endif
1834 sh_unix_siginstall (goDaemon);
1835
1836 /* set file creation mask
1837 */
1838 (void) umask (0); /* should not fail */
1839
1840 /* set resource limits to maximum, and
1841 * core dump size to zero
1842 */
1843 sh_unix_setlimits();
1844
1845 /* zero out the environment (like PATH='\0')
1846 */
1847 sh_unix_zeroenv();
1848
1849 if (goDaemon == 1)
1850 {
1851 /* close all file descriptors
1852 */
1853 sh_unix_closeall (0, -1); /* if running as daemon */
1854
1855 /* Enable full error logging
1856 */
1857 sh_error_only_stderr (S_FALSE);
1858
1859 /* open first three streams to /dev/null
1860 */
1861 status = aud_open(FIL__, __LINE__, SL_NOPRIV, _("/dev/null"), O_RDWR, 0);
1862 if (status < 0)
1863 {
1864 status = errno;
1865 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
1866 sh_error_message(status), _("open"));
1867 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1868 }
1869
1870 status = retry_aud_dup(FIL__, __LINE__, 0);
1871 if (status >= 0)
1872 retry_aud_dup(FIL__, __LINE__, 0);
1873
1874 if (status < 0)
1875 {
1876 status = errno;
1877 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
1878 sh_error_message(status), _("dup"));
1879 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1880 }
1881
1882 sh_error_enable_unsafe (S_TRUE);
1883#if defined(HAVE_LIBPRELUDE)
1884 sh_prelude_reset ();
1885#endif
1886
1887 /* --- wait until parent has exited ---
1888 */
1889 while (1 == 1)
1890 {
1891 errno = 0;
1892 if (0 > aud_kill (FIL__, __LINE__, oldpid, 0) && errno == ESRCH)
1893 {
1894 break;
1895 }
1896 retry_msleep(0, 1);
1897 }
1898
1899 /* write PID file
1900 */
1901 status = sh_unix_write_pid_file();
1902 if (status < 0)
1903 {
1904 sl_get_euid(&uid);
1905 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_PIDFILE,
1906 (long) uid, sh.srvlog.alt);
1907 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1908 }
1909#if defined(SH_WITH_SERVER)
1910 sh_socket_open_int ();
1911#endif
1912 }
1913 else
1914 {
1915 sh_unix_closeall(3, -1); /* if not daemon */
1916 sh_error_enable_unsafe (S_TRUE);
1917#if defined(HAVE_LIBPRELUDE)
1918 sh_prelude_reset ();
1919#endif
1920#if defined(SH_WITH_SERVER)
1921 sh_socket_open_int ();
1922#endif
1923 }
1924
1925 /* chroot (this is a no-op if no chroot dir is specified
1926 */
1927 status = sh_unix_chroot();
1928 if (status < 0)
1929 {
1930 status = errno;
1931 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
1932 sh_error_message(status), _("chroot"));
1933 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1934 }
1935
1936 /* drop capabilities
1937 */
1938 sl_drop_cap();
1939
1940 SL_RETURN((0),_("sh_unix_init"));
1941}
1942
1943/********************************************************
1944 *
1945 * TIME
1946 *
1947 ********************************************************/
1948
1949/* Figure out the time offset of the current timezone
1950 * in a portable way.
1951 */
1952char * t_zone(const time_t * xx)
1953{
1954 struct tm aa;
1955 struct tm bb;
1956 struct tm * cc;
1957 int sign = 0;
1958 int diff = 0;
1959 int hh, mm;
1960 static char tz[64];
1961
1962 SL_ENTER(_("t_zone"));
1963
1964
1965 cc = gmtime (xx);
1966 memcpy (&aa, cc, sizeof(struct tm));
1967 cc = localtime (xx);
1968 memcpy (&bb, cc, sizeof(struct tm));
1969
1970 /* Check for datum wrap-around.
1971 */
1972 if (aa.tm_year < bb.tm_year)
1973 sign = (-1);
1974 else if (aa.tm_mon < bb.tm_mon)
1975 sign = (-1);
1976 else if (aa.tm_mday < bb.tm_mday)
1977 sign = (-1);
1978 else if (bb.tm_year < aa.tm_year)
1979 sign = ( 1);
1980 else if (bb.tm_mon < aa.tm_mon)
1981 sign = ( 1);
1982 else if (bb.tm_mday < aa.tm_mday)
1983 sign = ( 1);
1984
1985 diff = aa.tm_hour * 60 + aa.tm_min;
1986 diff = (bb.tm_hour * 60 + bb.tm_min) - diff;
1987 diff = diff - (sign * 24 * 60); /* datum wrap-around correction */
1988 hh = diff / 60;
1989 mm = diff - (hh * 60);
1990 sprintf (tz, _("%+03d%02d"), hh, mm); /* known to fit */
1991
1992 SL_RETURN(tz, _("t_zone"));
1993}
1994
1995unsigned long sh_unix_longtime ()
1996{
1997 return ((unsigned long)time(NULL));
1998}
1999
2000#ifdef HAVE_GETTIMEOFDAY
2001unsigned long sh_unix_notime ()
2002{
2003 struct timeval tv;
2004
2005 gettimeofday (&tv, NULL);
2006
2007 return ((unsigned long)(tv.tv_sec + tv.tv_usec * 10835 + getpid() + getppid()));
2008
2009}
2010#endif
2011
2012static int count_dev_time = 0;
2013
2014void reset_count_dev_time(void)
2015{
2016 count_dev_time = 0;
2017 return;
2018}
2019
2020int sh_unix_settimeserver (const char * address)
2021{
2022
2023 SL_ENTER(_("sh_unix_settimeserver"));
2024
2025 if (address != NULL && count_dev_time < 2
2026 && sl_strlen(address) < SH_PATHBUF)
2027 {
2028 if (count_dev_time == 0)
2029 sl_strlcpy (sh.srvtime.name, address, SH_PATHBUF);
2030 else
2031 sl_strlcpy (sh.srvtime.alt, address, SH_PATHBUF);
2032
2033 ++count_dev_time;
2034 SL_RETURN((0), _("sh_unix_settimeserver"));
2035 }
2036 SL_RETURN((-1), _("sh_unix_settimeserver"));
2037}
2038
2039
2040#ifdef HAVE_NTIME
2041#define UNIXEPOCH 2208988800UL /* difference between Unix time and net time
2042 * The UNIX EPOCH starts in 1970.
2043 */
2044#include <sys/socket.h>
2045#include <netinet/in.h>
2046#include <arpa/inet.h>
2047#include <netdb.h>
2048#include <ctype.h>
2049#endif
2050
2051/* Timeserver service. */
2052/* define is missing on HP-UX 10.20 */
2053#ifndef IPPORT_TIMESERVER
2054#define IPPORT_TIMESERVER 37
2055#endif
2056
2057char * sh_unix_time (time_t thetime)
2058{
2059
2060 int status;
2061
2062 time_t time_now;
2063 struct tm * time_ptr;
2064 static char AsciiTime[81]; /* local time */
2065 static char RetTime[81]; /* local time */
2066#ifdef SH_USE_XML
2067 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2068#else
2069 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2070#endif
2071
2072#ifdef HAVE_NTIME
2073 int fd; /* network file descriptor */
2074 u_char net_time[4]; /* remote time in network format */
2075 static int failerr = 0; /* no net time */
2076 int fail = 0; /* no net time */
2077 int errflag;
2078 char errmsg[256];
2079 char error_call[SH_MINIBUF];
2080 int error_num;
2081#endif
2082
2083 SL_ENTER(_("sh_unix_time"));
2084
2085#ifdef HAVE_NTIME
2086 if (thetime == 0)
2087 {
2088 if (sh.srvtime.name[0] == '\0')
2089 {
2090 fail = 1;
2091 (void) time (&time_now);
2092 }
2093 else /* have a timeserver address */
2094 {
2095 fd = connect_port_2 (sh.srvtime.name, sh.srvtime.alt,
2096 IPPORT_TIMESERVER,
2097 error_call, &error_num, errmsg, sizeof(errmsg));
2098 if (fd >= 0)
2099 {
2100 if (4 != read_port (fd, (char *) net_time, 4, &errflag, 2))
2101 {
2102 fail = 1;
2103 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2104 MSG_E_NLOST,
2105 _("time"), sh.srvtime.name);
2106 }
2107 close(fd);
2108 }
2109 else
2110 {
2111 sh_error_handle ((-1), FIL__, __LINE__, error_num,
2112 MSG_E_NET, errmsg, error_call,
2113 _("time"), sh.srvtime.name);
2114 fail = 1;
2115 }
2116
2117 if (fail == 0)
2118 {
2119 time_now = ntohl(* (long *) net_time) - UNIXEPOCH;
2120 /* fprintf(stderr, "TIME IS %ld\n", time_now); */
2121 if (failerr == 1) {
2122 failerr = 0;
2123 sh_error_handle ((-1), FIL__, __LINE__, 0,
2124 MSG_E_NEST,
2125 _("time"), sh.srvtime.name);
2126 }
2127 }
2128 else
2129 {
2130 (void) time (&time_now);
2131 if (failerr == 0)
2132 {
2133 failerr = 1;
2134 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2135 MSG_SRV_FAIL,
2136 _("time"), sh.srvtime.name);
2137 }
2138 }
2139 }
2140 }
2141 else
2142 {
2143 time_now = thetime;
2144 }
2145
2146 /* #ifdef HAVE_NTIME */
2147#else
2148
2149 if (thetime == 0)
2150 {
2151 (void) time (&time_now);
2152 }
2153 else
2154 {
2155 time_now = thetime;
2156 }
2157
2158 /* #ifdef HAVE_NTIME */
2159#endif
2160
2161 if (time_now == (-1) )
2162 SL_RETURN( _(deftime), _("sh_unix_time"));
2163 else
2164 time_ptr = localtime (&time_now);
2165
2166 if (time_ptr != NULL)
2167 {
2168 status = strftime (AsciiTime, 80,
2169#ifdef SH_USE_XML
2170 _("%Y-%m-%dT%H:%M:%S%%s"),
2171#else
2172 _("[%Y-%m-%dT%H:%M:%S%%s]"),
2173#endif
2174 time_ptr);
2175
2176 sl_snprintf(RetTime, 80, AsciiTime, t_zone(&time_now));
2177
2178 if ( (status == 0) || (status == 80) )
2179 SL_RETURN( _(deftime), _("sh_unix_time"));
2180 else
2181 SL_RETURN( &RetTime[0], _("sh_unix_time"));
2182 }
2183
2184 /* last resort
2185 */
2186 SL_RETURN( _(deftime), _("sh_unix_time"));
2187}
2188
2189static int sh_unix_use_localtime = S_FALSE;
2190
2191/* whether to use localtime for file timesatams in logs
2192 */
2193int sh_unix_uselocaltime (const char * c)
2194{
2195 int i;
2196 SL_ENTER(_("sh_unix_uselocaltime"));
2197 i = sh_util_flagval(c, &(sh_unix_use_localtime));
2198
2199 SL_RETURN(i, _("sh_unix_uselocaltime"));
2200}
2201
2202char * sh_unix_gmttime (time_t thetime)
2203{
2204
2205 int status;
2206
2207 struct tm * time_ptr;
2208 static char AsciiTime[81]; /* GMT time */
2209#ifdef SH_USE_XML
2210 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2211#else
2212 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2213#endif
2214
2215 SL_ENTER(_("sh_unix_gmttime"));
2216
2217 if (sh_unix_use_localtime == S_FALSE)
2218 time_ptr = gmtime (&thetime);
2219 else
2220 time_ptr = localtime (&thetime);
2221
2222 if (time_ptr != NULL)
2223 {
2224 status = strftime (AsciiTime, 80,
2225#ifdef SH_USE_XML
2226 _("%Y-%m-%dT%H:%M:%S"),
2227#else
2228 _("[%Y-%m-%dT%H:%M:%S]"),
2229#endif
2230 time_ptr);
2231
2232 if ( (status == 0) || (status == 80) )
2233 SL_RETURN( _(deftime), _("sh_unix_gmttime"));
2234 else
2235 SL_RETURN( &AsciiTime[0], _("sh_unix_gmttime"));
2236 }
2237
2238 /* last resort
2239 */
2240 SL_RETURN( _(deftime), _("sh_unix_gmttime"));
2241}
2242
2243
2244
2245char * sh_unix_getUIDdir (int level, uid_t uid)
2246{
2247 struct passwd * tempres;
2248 int status = 0;
2249
2250 SL_ENTER(_("sh_unix_getUIDdir"));
2251
2252 errno = 0;
2253 tempres = sh_getpwuid(uid);
2254 status = errno;
2255
2256 if (tempres == NULL) {
2257 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2258 sh_error_message(status),
2259 _("getpwuid"), (long) uid, _("completely missing"));
2260 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2261 }
2262
2263 if (tempres->pw_dir != NULL) {
2264 SL_RETURN( tempres->pw_dir, _("sh_unix_getUIDdir"));
2265 } else {
2266 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2267 sh_error_message(status),
2268 _("getpwuid"), (long) uid, _("pw_dir"));
2269 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2270 }
2271}
2272
2273char * sh_unix_getUIDname (int level, uid_t uid)
2274{
2275 struct passwd * tempres;
2276 int status = 0;
2277 static uid_t old_uid;
2278 static char name[32] = { '\0' };
2279
2280 SL_ENTER(_("sh_unix_getUIDname"));
2281
2282 if ((uid == old_uid) && (name[0] != '\0')) {
2283 SL_RETURN( name, _("sh_unix_getUIDname"));
2284 }
2285
2286 errno = 0;
2287 tempres = sh_getpwuid(uid);
2288 status = errno;
2289
2290 if (tempres == NULL) {
2291 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2292 sh_error_message(status),
2293 _("getpwuid"), (long) uid, _("completely missing"));
2294 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2295 }
2296
2297
2298 if (tempres->pw_name != NULL) {
2299 sl_strlcpy(name, tempres->pw_name, sizeof(name));
2300 old_uid = uid;
2301 SL_RETURN( name, _("sh_unix_getUIDname"));
2302 } else {
2303 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2304 sh_error_message(status),
2305 _("getpwuid"), (long) uid, _("pw_user"));
2306 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2307 }
2308}
2309
2310char * sh_unix_getGIDname (int level, gid_t gid)
2311{
2312 struct group * tempres;
2313 int status = 0;
2314 static gid_t old_gid;
2315 static char name[32] = { '\0' };
2316
2317 SL_ENTER(_("sh_unix_getGIDname"));
2318
2319 if ((gid == old_gid) && (name[0] != '\0')) {
2320 SL_RETURN( name, _("sh_unix_getUIDname"));
2321 }
2322
2323 errno = 0;
2324 tempres = sh_getgrgid(gid);
2325 status = errno;
2326
2327 if (tempres == NULL) {
2328 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2329 sh_error_message(status),
2330 _("getgrgid"), (long) gid, _("completely missing"));
2331
2332 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2333 }
2334
2335 if (tempres->gr_name != NULL) {
2336 sl_strlcpy(name, tempres->gr_name, sizeof(name));
2337 old_gid = gid;
2338 SL_RETURN( name, _("sh_unix_getGIDname"));
2339 } else {
2340 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2341 sh_error_message(status),
2342 _("getgrgid"), (long) gid, _("gr_name"));
2343 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2344 }
2345}
2346
2347int sh_unix_getUser ()
2348{
2349 char * p;
2350 uid_t seuid, sruid;
2351
2352 SL_ENTER(_("sh_unix_getUser"));
2353
2354 seuid = geteuid();
2355
2356 sh.effective.uid = seuid;
2357
2358 p = sh_unix_getUIDdir (SH_ERR_ERR, seuid);
2359
2360 if (p == NULL)
2361 SL_RETURN((-1), _("sh_unix_getUser"));
2362 else
2363 {
2364 if (sl_strlen(p) >= SH_PATHBUF) {
2365 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2366 _("getpwuid"), (long) seuid, _("pw_home"));
2367 SL_RETURN((-1), _("sh_unix_getUser"));
2368 } else {
2369 sl_strlcpy ( sh.effective.home, p, SH_PATHBUF);
2370 }
2371 }
2372
2373 sruid = getuid();
2374
2375 sh.real.uid = sruid;
2376
2377 p = sh_unix_getUIDname (SH_ERR_ERR, sruid);
2378 if (p == NULL)
2379 SL_RETURN((-1), _("sh_unix_getUser"));
2380 else
2381 {
2382 if (sl_strlen(p) >= USER_MAX) {
2383 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2384 _("getpwuid"), (long) sruid, _("pw_user"));
2385 SL_RETURN((-1), _("sh_unix_getUser"));
2386 } else {
2387 sl_strlcpy ( sh.real.user, p, USER_MAX);
2388 }
2389 }
2390
2391 p = sh_unix_getUIDdir (SH_ERR_ERR, sruid);
2392
2393 if (p == NULL)
2394 SL_RETURN((-1), _("sh_unix_getUser"));
2395 else
2396 {
2397 if (sl_strlen(p) >= SH_PATHBUF) {
2398 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2399 _("getpwuid"), (long) sruid, _("pw_home"));
2400 SL_RETURN((-1), _("sh_unix_getUser"));
2401 } else {
2402 sl_strlcpy ( sh.real.home, p, SH_PATHBUF);
2403 }
2404 }
2405
2406 SL_RETURN((0), _("sh_unix_getUser"));
2407
2408 /* notreached */
2409}
2410
2411
2412int sh_unix_getline (SL_TICKET fd, char * line, int sizeofline)
2413{
2414 register int count;
2415 register int n = 0;
2416 char c;
2417
2418 SL_ENTER(_("sh_unix_getline"));
2419
2420 if (sizeofline < 2) {
2421 line[0] = '\0';
2422 SL_RETURN((0), _("sh_unix_getline"));
2423 }
2424
2425 --sizeofline;
2426
2427 while (n < sizeofline) {
2428
2429 count = sl_read (fd, &c, 1);
2430
2431 /* end of file
2432 */
2433 if (count < 1) {
2434 line[n] = '\0';
2435 n = -1;
2436 break;
2437 }
2438
2439 if (/* c != '\0' && */ c != '\n') {
2440 line[n] = c;
2441 ++n;
2442 } else if (c == '\n') {
2443 if (n > 0) {
2444 line[n] = '\0';
2445 break;
2446 } else {
2447 line[n] = '\n'; /* get newline only if only char on line */
2448 ++n;
2449 line[n] = '\0';
2450 break;
2451 }
2452 } else {
2453 line[n] = '\0';
2454 break;
2455 }
2456
2457 }
2458
2459
2460 line[sizeofline] = '\0'; /* make sure line is terminated */
2461 SL_RETURN((n), _("sh_unix_getline"));
2462}
2463
2464
2465#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
2466
2467/**************************************************************
2468 *
2469 * --- FILE INFO ---
2470 *
2471 **************************************************************/
2472
2473#if (defined(__linux__) && (defined(HAVE_LINUX_EXT2_FS_H) || defined(HAVE_EXT2FS_EXT2_FS_H))) || defined(HAVE_STAT_FLAGS)
2474
2475#if defined(__linux__)
2476
2477/* --- Determine ext2fs file attributes. ---
2478 */
2479#include <sys/ioctl.h>
2480#if defined(HAVE_EXT2FS_EXT2_FS_H)
2481#include <ext2fs/ext2_fs.h>
2482#else
2483#include <linux/ext2_fs.h>
2484#endif
2485
2486/* __linux__ includes */
2487#endif
2488
2489static
2490int sh_unix_getinfo_attr (char * name,
2491 unsigned long * flags,
2492 char * c_attr,
2493 int fd, struct stat * buf)
2494{
2495
2496/* TAKEN FROM:
2497 *
2498 * lsattr.c - List file attributes on an ext2 file system
2499 *
2500 * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
2501 * Laboratoire MASI, Institut Blaise Pascal
2502 * Universite Pierre et Marie Curie (Paris VI)
2503 *
2504 * This file can be redistributed under the terms of the GNU General
2505 * Public License
2506 */
2507
2508#ifdef HAVE_STAT_FLAGS
2509
2510 SL_ENTER(_("sh_unix_getinfo_attr"));
2511
2512 *flags = 0;
2513
2514 /* cast to void to avoid compiler warning about unused parameters */
2515 (void) fd;
2516 (void) name;
2517
2518#ifdef UF_NODUMP
2519 if (buf->st_flags & UF_NODUMP) {
2520 *flags |= UF_NODUMP;
2521 c_attr[0] = 'd';
2522 }
2523#endif
2524#ifdef UF_IMMUTABLE
2525 if (buf->st_flags & UF_IMMUTABLE) {
2526 *flags |= UF_IMMUTABLE;
2527 c_attr[1] = 'i';
2528 }
2529#endif
2530#ifdef UF_APPEND
2531 if (buf->st_flags & UF_APPEND) {
2532 *flags |= UF_APPEND;
2533 c_attr[2] = 'a';
2534 }
2535#endif
2536#ifdef UF_NOUNLINK
2537 if (buf->st_flags & UF_NOUNLINK) {
2538 *flags |= UF_NOUNLINK;
2539 c_attr[3] = 'u';
2540 }
2541#endif
2542#ifdef UF_OPAQUE
2543 if (buf->st_flags & UF_OPAQUE) {
2544 *flags |= UF_OPAQUE;
2545 c_attr[4] = 'o';
2546 }
2547#endif
2548#ifdef SF_ARCHIVED
2549 if (buf->st_flags & SF_ARCHIVED) {
2550 *flags |= SF_ARCHIVED;
2551 c_attr[5] = 'R';
2552 }
2553
2554#endif
2555#ifdef SF_IMMUTABLE
2556 if (buf->st_flags & SF_IMMUTABLE) {
2557 *flags |= SF_IMMUTABLE;
2558 c_attr[6] = 'I';
2559 }
2560#endif
2561#ifdef SF_APPEND
2562 if (buf->st_flags & SF_APPEND) {
2563 *flags |= SF_APPEND;
2564 c_attr[7] = 'A';
2565 }
2566#endif
2567#ifdef SF_NOUNLINK
2568 if (buf->st_flags & SF_NOUNLINK) {
2569 *flags |= SF_NOUNLINK;
2570 c_attr[8] = 'U';
2571 }
2572#endif
2573
2574 /* ! HAVE_STAT_FLAGS */
2575#else
2576
2577#ifdef HAVE_EXT2_IOCTLS
2578 int /* fd, */ r, f;
2579
2580 SL_ENTER(_("sh_unix_getinfo_attr"));
2581
2582 *flags = 0;
2583 (void) buf;
2584
2585 /* open() -> aud_open() R.Wichmann
2586 fd = aud_open (FIL__, __LINE__, SL_YESPRIV, name, O_RDONLY|O_NONBLOCK, 0);
2587 */
2588
2589 if (fd == -1 || name == NULL)
2590 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
2591
2592
2593 r = ioctl (fd, EXT2_IOC_GETFLAGS, &f);
2594 /* close (fd); */
2595
2596 if (r == -1)
2597 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
2598
2599 if (f == 0)
2600 SL_RETURN(0, _("sh_unix_getinfo_attr"));
2601
2602 *flags = f;
2603
2604/* ! HAVE_EXT2_IOCTLS */
2605#else
2606
2607 SL_ENTER(_("sh_unix_getinfo_attr"));
2608
2609 *flags = 0; /* modified by R.Wichmann */
2610
2611/* ! HAVE_EXT2_IOCTLS */
2612#endif
2613/*
2614 * END
2615 *
2616 * lsattr.c - List file attributes on an ext2 file system
2617 */
2618
2619 if (*flags == 0)
2620 goto theend;
2621
2622#ifdef EXT2_SECRM_FL
2623 if ( (*flags & EXT2_SECRM_FL) != 0 ) c_attr[0] = 's';
2624#endif
2625#ifdef EXT2_UNRM_FL
2626 if ( (*flags & EXT2_UNRM_FL) != 0 ) c_attr[1] = 'u';
2627#endif
2628#ifdef EXT2_SYNC_FL
2629 if ( (*flags & EXT2_SYNC_FL) != 0 ) c_attr[2] = 'S';
2630#endif
2631#ifdef EXT2_IMMUTABLE_FL
2632 if ( (*flags & EXT2_IMMUTABLE_FL) != 0) c_attr[3] = 'i';
2633#endif
2634#ifdef EXT2_APPEND_FL
2635 if ( (*flags & EXT2_APPEND_FL) != 0 ) c_attr[4] = 'a';
2636#endif
2637#ifdef EXT2_NODUMP_FL
2638 if ( (*flags & EXT2_NODUMP_FL) != 0 ) c_attr[5] = 'd';
2639#endif
2640#ifdef EXT2_NOATIME_FL
2641 if ( (*flags & EXT2_NOATIME_FL) != 0) c_attr[6] = 'A';
2642#endif
2643#ifdef EXT2_COMPR_FL
2644 if ( (*flags & EXT2_COMPR_FL) != 0 ) c_attr[7] = 'c';
2645#endif
2646
2647#ifdef EXT2_TOPDIR_FL
2648 if ( (*flags & EXT2_TOPDIR_FL) != 0 ) c_attr[8] = 'T';
2649#endif
2650#ifdef EXT2_DIRSYNC_FL
2651 if ( (*flags & EXT2_DIRSYNC_FL) != 0 ) c_attr[9] = 'D';
2652#endif
2653#ifdef EXT2_NOTAIL_FL
2654 if ( (*flags & EXT2_NOTAIL_FL) != 0 ) c_attr[10] = 't';
2655#endif
2656#ifdef EXT2_JOURNAL_DATA_FL
2657 if ( (*flags & EXT2_JOURNAL_DATA_FL) != 0) c_attr[11] = 'j';
2658#endif
2659
2660 theend:
2661 /* ext2 */
2662#endif
2663
2664 c_attr[12] = '\0';
2665
2666 SL_RETURN(0, _("sh_unix_getinfo_attr"));
2667}
2668#else
2669static
2670int sh_unix_getinfo_attr (char * name,
2671 unsigned long * flags,
2672 char * c_attr,
2673 int fd, struct stat * buf)
2674{
2675 return 0;
2676}
2677
2678/* defined(__linux__) || defined(HAVE_STAT_FLAGS) */
2679#endif
2680
2681/* determine file type
2682 */
2683static
2684int sh_unix_getinfo_type (struct stat * buf,
2685 ShFileType * type,
2686 char * c_mode)
2687{
2688 SL_ENTER(_("sh_unix_getinfo_type"));
2689
2690 if ( S_ISREG(buf->st_mode) ) {
2691 (*type) = SH_FILE_REGULAR;
2692 c_mode[0] = '-';
2693 }
2694 else if ( S_ISLNK(buf->st_mode) ) {
2695 (*type) = SH_FILE_SYMLINK;
2696 c_mode[0] = 'l';
2697 }
2698 else if ( S_ISDIR(buf->st_mode) ) {
2699 (*type) = SH_FILE_DIRECTORY;
2700 c_mode[0] = 'd';
2701 }
2702 else if ( S_ISCHR(buf->st_mode) ) {
2703 (*type) = SH_FILE_CDEV;
2704 c_mode[0] = 'c';
2705 }
2706 else if ( S_ISBLK(buf->st_mode) ) {
2707 (*type) = SH_FILE_BDEV;
2708 c_mode[0] = 'b';
2709 }
2710 else if ( S_ISFIFO(buf->st_mode) ) {
2711 (*type) = SH_FILE_FIFO;
2712 c_mode[0] = '|';
2713 }
2714 else if ( S_ISSOCK(buf->st_mode) ) {
2715 (*type) = SH_FILE_SOCKET;
2716 c_mode[0] = 's';
2717 }
2718 else if ( S_ISDOOR(buf->st_mode) ) {
2719 (*type) = SH_FILE_DOOR;
2720 c_mode[0] = 'D';
2721 }
2722 else if ( S_ISPORT(buf->st_mode) ) {
2723 (*type) = SH_FILE_PORT;
2724 c_mode[0] = 'P';
2725 }
2726 else {
2727 (*type) = SH_FILE_UNKNOWN;
2728 c_mode[0] = '?';
2729 }
2730
2731 SL_RETURN(0, _("sh_unix_getinfo_type"));
2732}
2733
2734int sh_unix_get_ftype(char * fullpath)
2735{
2736 char c_mode[16];
2737 struct stat buf;
2738 ShFileType type;
2739 int res;
2740
2741 SL_ENTER(_("sh_unix_get_ftype"));
2742
2743 res = retry_lstat(FIL__, __LINE__, fullpath, &buf);
2744
2745 if (res < 0)
2746 SL_RETURN(SH_FILE_UNKNOWN, _("sh_unix_getinfo_type"));
2747
2748 sh_unix_getinfo_type (&buf, &type, c_mode);
2749
2750 SL_RETURN(type, _("sh_unix_get_ftype"));
2751}
2752
2753
2754static
2755int sh_unix_getinfo_mode (struct stat *buf,
2756 unsigned int * mode,
2757 char * c_mode)
2758{
2759
2760 SL_ENTER(_("sh_unix_getinfo_mode"));
2761
2762 (*mode) = buf->st_mode;
2763
2764 /* make 'ls'-like string */
2765
2766 if ( (buf->st_mode & S_IRUSR) != 0 ) c_mode[1] = 'r';
2767 if ( (buf->st_mode & S_IWUSR) != 0 ) c_mode[2] = 'w';
2768 if ( (buf->st_mode & S_IXUSR) != 0 ) {
2769 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 's';
2770 else c_mode[3] = 'x';
2771 } else {
2772 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 'S';
2773 }
2774
2775 if ( (buf->st_mode & S_IRGRP) != 0 ) c_mode[4] = 'r';
2776 if ( (buf->st_mode & S_IWGRP) != 0 ) c_mode[5] = 'w';
2777 if ( (buf->st_mode & S_IXGRP) != 0 ) {
2778 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 's';
2779 else c_mode[6] = 'x';
2780 } else {
2781 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 'S';
2782 }
2783
2784 if ( (buf->st_mode & S_IROTH) != 0 ) c_mode[7] = 'r';
2785 if ( (buf->st_mode & S_IWOTH) != 0 ) c_mode[8] = 'w';
2786#ifdef S_ISVTX /* not POSIX */
2787 if ( (buf->st_mode & S_IXOTH) != 0 ) {
2788 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 't';
2789 else c_mode[9] = 'x';
2790 } else {
2791 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 'T';
2792 }
2793#else
2794 if ( (buf->st_mode & S_IXOTH) != 0 ) c_mode[9] = 'x';
2795#endif
2796
2797 SL_RETURN(0, _("sh_unix_getinfo_mode"));
2798}
2799
2800
2801long IO_Limit = 0;
2802
2803void sh_unix_io_pause ()
2804{
2805 long runtime;
2806 float someval;
2807 unsigned long sometime;
2808
2809 if (IO_Limit == 0)
2810 {
2811 return;
2812 }
2813 else
2814 {
2815 runtime = (long) (time(NULL) - sh.statistics.time_start);
2816
2817 if (runtime > 0 && (long)(sh.statistics.bytes_hashed/runtime) > IO_Limit)
2818 {
2819 someval = sh.statistics.bytes_hashed - (IO_Limit * runtime);
2820 someval /= (float) IO_Limit;
2821 if (someval < 1.0)
2822 {
2823 someval *= 1000; /* milliseconds in a second */
2824 sometime = (unsigned long) someval;
2825 /* fprintf(stderr, "FIXME PAUSE %ld\n", sometime); */
2826 retry_msleep(0, sometime);
2827 }
2828 else
2829 {
2830 sometime = (unsigned long) someval;
2831 /* fprintf(stderr, "FIXME PAUSE %ld sec\n", sometime); */
2832 retry_msleep (sometime, 0);
2833 }
2834 }
2835 }
2836 return;
2837}
2838
2839int sh_unix_set_io_limit (const char * c)
2840{
2841 long val;
2842
2843 SL_ENTER(_("sh_unix_set_io_limit"));
2844
2845 val = strtol (c, (char **)NULL, 10);
2846 if (val < 0)
2847 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
2848 _("set I/O limit"), c);
2849
2850 val = (val < 0 ? 0 : val);
2851
2852 IO_Limit = val * 1024;
2853 SL_RETURN( 0, _("sh_unix_set_io_limit"));
2854}
2855
2856/* obtain file info
2857 */
2858extern int flag_err_debug;
2859
2860#include "sh_ignore.h"
2861
2862int sh_unix_checksum_size (char * filename, struct stat * fbuf,
2863 char * fileHash, int alert_timeout)
2864{
2865 file_type tmpFile;
2866 int status;
2867
2868 SL_ENTER(_("sh_unix_checksum_size"));
2869
2870 if (sh.flag.checkSum != SH_CHECK_INIT)
2871 {
2872 /* lookup file in database */
2873 status = sh_hash_get_it (filename, &tmpFile);
2874 if (status != 0) {
2875 goto out;
2876 }
2877 }
2878 else
2879 {
2880 tmpFile.size = fbuf->st_size;
2881 }
2882
2883 /* if last < current get checksum */
2884 if (tmpFile.size < fbuf->st_size)
2885 {
2886 sl_strlcpy(fileHash,
2887 sh_tiger_generic_hash (filename, TIGER_FD, tmpFile.size,
2888 alert_timeout),
2889 KEY_LEN+1);
2890
2891 /* return */
2892 SL_RETURN( 0, _("sh_unix_checksum_size"));
2893 }
2894
2895 out:
2896 sl_strlcpy(fileHash,
2897 _("000000000000000000000000000000000000000000000000"),
2898 KEY_LEN+1);
2899 SL_RETURN( -1, _("sh_unix_checksum_size"));
2900}
2901
2902int sh_unix_check_selinux = S_FALSE;
2903int sh_unix_check_acl = S_FALSE;
2904
2905#ifdef USE_ACL
2906
2907#include <sys/acl.h>
2908static char * sh_unix_getinfo_acl (char * path, int fd, struct stat * buf)
2909{
2910 /* system.posix_acl_access, system.posix_acl_default
2911 */
2912 char * out = NULL;
2913 char * collect = NULL;
2914 char * tmp;
2915 char * out_compact;
2916 ssize_t len;
2917 acl_t result;
2918
2919 SL_ENTER(_("sh_unix_getinfo_acl"));
2920
2921 result = (fd == -1) ?
2922 acl_get_file (path, ACL_TYPE_ACCESS) :
2923 acl_get_fd (fd);
2924
2925 if (result)
2926 {
2927 out = acl_to_text (result, &len);
2928 if (out && (len > 0)) {
2929 out_compact = sh_util_acl_compact (out, len);
2930 acl_free(out);
2931 if (out_compact)
2932 {
2933 collect = sh_util_strconcat (_("acl_access:"), out_compact, NULL);
2934 SH_FREE(out_compact);
2935 }
2936 }
2937 acl_free(result);
2938 }
2939
2940
2941 if ( S_ISDIR(buf->st_mode) )
2942 {
2943 result = acl_get_file (path, ACL_TYPE_DEFAULT);
2944
2945 if (result)
2946 {
2947 out = acl_to_text (result, &len);
2948 if (out && (len > 0)) {
2949 out_compact = sh_util_acl_compact (out, len);
2950 acl_free(out);
2951 if (out_compact) {
2952 if (collect) {
2953 tmp = sh_util_strconcat (_("acl_default:"),
2954 out_compact, ":", collect, NULL);
2955 SH_FREE(collect);
2956 }
2957 else {
2958 tmp = sh_util_strconcat (_("acl_default:"), out_compact, NULL);
2959 }
2960 SH_FREE(out_compact);
2961 collect = tmp;
2962 }
2963 }
2964 acl_free(result);
2965 }
2966 }
2967
2968 SL_RETURN((collect),_("sh_unix_getinfo_acl"));
2969}
2970#endif
2971
2972#ifdef USE_XATTR
2973
2974#include <attr/xattr.h>
2975static char * sh_unix_getinfo_xattr_int (char * path, int fd, char * name)
2976{
2977 char * out = NULL;
2978 char * tmp = NULL;
2979 size_t size = 256;
2980 ssize_t result;
2981
2982 SL_ENTER(_("sh_unix_getinfo_xattr_int"));
2983
2984 out = SH_ALLOC(size);
2985
2986 result = (fd == -1) ?
2987 lgetxattr (path, name, out, size-1) :
2988 fgetxattr (fd, name, out, size-1);
2989
2990 if (result == -1 && errno == ERANGE)
2991 {
2992 SH_FREE(out);
2993 result = (fd == -1) ?
2994 lgetxattr (path, name, NULL, 0) :
2995 fgetxattr (fd, name, NULL, 0);
2996 size = result + 1;
2997 out = SH_ALLOC(size);
2998 result = (fd == -1) ?
2999 lgetxattr (path, name, out, size-1) :
3000 fgetxattr (fd, name, out, size-1);
3001 }
3002
3003 if ((result > 0) && ((size_t)result < size))
3004 {
3005 out[size-1] = '\0';
3006 tmp = out;
3007 }
3008 else
3009 {
3010 SH_FREE(out);
3011 }
3012
3013 SL_RETURN((tmp),_("sh_unix_getinfo_xattr_int"));
3014}
3015
3016
3017static char * sh_unix_getinfo_xattr (char * path, int fd, struct stat * buf)
3018{
3019 /* system.posix_acl_access, system.posix_acl_default, security.selinux
3020 */
3021 char * tmp;
3022 char * out = NULL;
3023 char * collect = NULL;
3024
3025 SL_ENTER(_("sh_unix_getinfo_xattr"));
3026
3027#ifdef USE_ACL
3028 /*
3029 * we need the acl_get_fd/acl_get_file functions, getxattr will only
3030 * yield the raw bytes
3031 */
3032 if (sh_unix_check_acl == S_TRUE)
3033 {
3034 out = sh_unix_getinfo_acl(path, fd, buf);
3035
3036 if (out)
3037 {
3038 collect = out;
3039 }
3040 }
3041#endif
3042
3043 out = sh_unix_getinfo_xattr_int(path, fd, _("security.selinux"));
3044
3045 if (out)
3046 {
3047 if (collect) {
3048 tmp = sh_util_strconcat(_("selinux:"), out, ":", collect, NULL);
3049 SH_FREE(collect);
3050 }
3051 else {
3052 tmp = sh_util_strconcat(_("selinux:"), out, NULL);
3053 }
3054 SH_FREE(out);
3055 collect = tmp;
3056 }
3057
3058 SL_RETURN((collect),_("sh_unix_getinfo_xattr"));
3059}
3060#endif
3061
3062#ifdef USE_XATTR
3063int sh_unix_setcheckselinux (const char * c)
3064{
3065 int i;
3066 SL_ENTER(_("sh_unix_setcheckselinux"));
3067 i = sh_util_flagval(c, &(sh_unix_check_selinux));
3068
3069 SL_RETURN(i, _("sh_unix_setcheckselinux"));
3070}
3071#endif
3072
3073#ifdef USE_ACL
3074int sh_unix_setcheckacl (const char * c)
3075{
3076 int i;
3077 SL_ENTER(_("sh_unix_setcheckacl"));
3078 i = sh_util_flagval(c, &(sh_unix_check_acl));
3079
3080 SL_RETURN(i, _("sh_unix_setcheckacl"));
3081}
3082#endif
3083
3084
3085int sh_unix_getinfo (int level, char * filename, file_type * theFile,
3086 char * fileHash, int policy)
3087{
3088 char timestr[81];
3089 long runtim;
3090 struct stat buf;
3091 struct stat lbuf;
3092 struct stat fbuf;
3093 int stat_return;
3094
3095 ShFileType type;
3096 unsigned int mode;
3097 char * name;
3098 char * tmp;
3099 char * tmp2;
3100
3101 char * linknamebuf;
3102 int linksize;
3103
3104 extern int get_the_fd (SL_TICKET ticket);
3105
3106 SL_TICKET rval_open;
3107 int fd;
3108 int fstat_return;
3109
3110 time_t tend;
3111 time_t tstart;
3112
3113
3114 char * path = NULL;
3115
3116 int alert_timeout = 120;
3117
3118 path = theFile->fullpath;
3119
3120 SL_ENTER(_("sh_unix_getinfo"));
3121
3122 /* --- Stat the file, and get checksum. ---
3123 */
3124 tstart = time(NULL);
3125
3126 stat_return = retry_lstat (FIL__, __LINE__,
3127 path /* theFile->fullpath */, &buf);
3128
3129 fd = -1;
3130 fstat_return = -1;
3131 rval_open = -1;
3132
3133 if (stat_return == 0 && S_ISREG(buf.st_mode))
3134 {
3135 rval_open = sl_open_fastread (path /* theFile->fullpath */, SL_YESPRIV);
3136
3137 alert_timeout = 120; /* this is per 8K block now ! */
3138
3139 if (path[1] == 'p' && path[5] == '/' && path[2] == 'r' &&
3140 path[3] == 'o' && path[4] == 'c' && path[0] == '/')
3141 {
3142 /* seven is magic */
3143 alert_timeout = 7;
3144 }
3145
3146 fd = get_the_fd(rval_open);
3147 }
3148
3149 tend = time(NULL);
3150
3151 /* An unprivileged user may slow lstat/open to a crawl
3152 * with clever path/symlink setup
3153 */
3154 if ((tend - tstart) > (time_t) /* 60 */ 6)
3155 {
3156 tmp2 = sh_util_safe_name (theFile->fullpath);
3157 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_TOOLATE,
3158 (long)(tend - tstart), tmp2);
3159 SH_FREE(tmp2);
3160 }
3161
3162 if (fd >= 0)
3163 fstat_return = retry_fstat (FIL__, __LINE__, fd, &fbuf);
3164 else
3165 fd = -1;
3166
3167
3168 /* --- case 1: lstat failed ---
3169 */
3170 if (stat_return != 0)
3171 {
3172 stat_return = errno;
3173 if (!SL_ISERROR(rval_open))
3174 sl_close(rval_open);
3175 if (sh.flag.checkSum == SH_CHECK_INIT ||
3176 (sh_hash_have_it (theFile->fullpath) >= 0 &&
3177 theFile->reported == S_FALSE))
3178 {
3179 if (S_FALSE == sh_ignore_chk_del(theFile->fullpath)) {
3180 tmp2 = sh_util_safe_name (theFile->fullpath);
3181 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_LSTAT,
3182 sh_error_message (stat_return), tmp2);
3183 SH_FREE(tmp2);
3184 }
3185 }
3186 SL_RETURN((-1),_("sh_unix_getinfo"));
3187 }
3188
3189 /* --- case 2: not a regular file ---
3190 */
3191 else if (! S_ISREG(buf.st_mode))
3192 {
3193 if (fileHash != NULL)
3194 sl_strlcpy(fileHash,
3195 _("000000000000000000000000000000000000000000000000"),
3196 KEY_LEN+1);
3197 }
3198
3199 /* --- case 3a: a regular file, fstat ok ---
3200 */
3201 else if (fstat_return == 0 &&
3202 buf.st_mode == fbuf.st_mode &&
3203 buf.st_ino == fbuf.st_ino &&
3204 buf.st_uid == fbuf.st_uid &&
3205 buf.st_gid == fbuf.st_gid &&
3206 buf.st_dev == fbuf.st_dev )
3207 {
3208 if (fileHash != NULL)
3209 {
3210 if ((theFile->check_mask & MODI_CHK) == 0)
3211 {
3212 sl_strlcpy(fileHash,
3213 _("000000000000000000000000000000000000000000000000"),
3214 KEY_LEN+1);
3215 }
3216 else if ((theFile->check_mask & MODI_PREL) != 0 &&
3217 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
3218 alert_timeout))
3219 {
3220 if (0 != sh_prelink_run (theFile->fullpath,
3221 fileHash, alert_timeout))
3222 sl_strlcpy(fileHash,
3223 _("000000000000000000000000000000000000000000000000"),
3224 KEY_LEN+1);
3225 }
3226 else
3227 {
3228 tiger_fd = rval_open;
3229 sl_strlcpy(fileHash,
3230 sh_tiger_generic_hash (theFile->fullpath,
3231 TIGER_FD, 0,
3232 alert_timeout),
3233 KEY_LEN+1);
3234 if ((theFile->check_mask & MODI_SGROW) != 0)
3235 {
3236 sl_rewind(rval_open);
3237 tiger_fd = rval_open;
3238 sh_unix_checksum_size (theFile->fullpath, &fbuf,
3239 &fileHash[KEY_LEN + 1],
3240 alert_timeout);
3241 }
3242 }
3243 }
3244 }
3245
3246 /* --- case 3b: a regular file, fstat ok, but different ---
3247 */
3248 else if (fstat_return == 0 && S_ISREG(fbuf.st_mode))
3249 {
3250 memcpy (&buf, &fbuf, sizeof( struct stat ));
3251
3252 if (fileHash != NULL)
3253 {
3254 if ((theFile->check_mask & MODI_CHK) == 0)
3255 {
3256 sl_strlcpy(fileHash,
3257 _("000000000000000000000000000000000000000000000000"),
3258 KEY_LEN+1);
3259 }
3260 else if (policy == SH_LEVEL_PRELINK &&
3261 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
3262 alert_timeout))
3263 {
3264 if (0 != sh_prelink_run (theFile->fullpath,
3265 fileHash, alert_timeout))
3266 sl_strlcpy(fileHash,
3267 _("000000000000000000000000000000000000000000000000"),
3268 KEY_LEN+1);
3269 }
3270 else
3271 {
3272 tiger_fd = rval_open;
3273 sl_strlcpy(fileHash,
3274 sh_tiger_generic_hash (theFile->fullpath, TIGER_FD, 0,
3275 alert_timeout),
3276 KEY_LEN + 1);
3277 if ((theFile->check_mask & MODI_SGROW) != 0)
3278 {
3279 sl_rewind(rval_open);
3280 tiger_fd = rval_open;
3281 sh_unix_checksum_size (theFile->fullpath, &fbuf,
3282 &fileHash[KEY_LEN + 1],
3283 alert_timeout);
3284 }
3285 }
3286 }
3287 }
3288
3289 /* --- case 4: a regular file, fstat failed ---
3290 */
3291
3292 else /* fstat_return != 0 or !S_ISREG(fbuf->st_mode) */
3293 {
3294 fstat_return = errno;
3295 if (fileHash != NULL)
3296 sl_strlcpy(fileHash,
3297 _("000000000000000000000000000000000000000000000000"),
3298 KEY_LEN + 1);
3299
3300 if ((theFile->check_mask & MODI_CHK) != 0)
3301 {
3302 tmp2 = sh_util_safe_name (theFile->fullpath);
3303 sh_error_handle (level, FIL__, __LINE__, fstat_return, MSG_E_READ,
3304 tmp2);
3305 SH_FREE(tmp2);
3306 }
3307 }
3308
3309
3310 /* --- Determine file type. ---
3311 */
3312 memset (theFile->c_mode, '-', 10);
3313 theFile->c_mode[10] = '\0';
3314
3315 memset (theFile->link_c_mode, '-', 10);
3316 theFile->link_c_mode[10] = '\0';
3317
3318 sh_unix_getinfo_type (&buf, &type, theFile->c_mode);
3319 theFile->type = type;
3320
3321#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
3322
3323 /* --- Determine file attributes. ---
3324 */
3325 memset (theFile->c_attributes, '-', 12);
3326 theFile->c_attributes[12] = '\0';
3327 theFile->attributes = 0;
3328
3329 if (theFile->c_mode[0] != 'c' && theFile->c_mode[0] != 'b' &&
3330 theFile->c_mode[0] != 'l' )
3331 sh_unix_getinfo_attr(theFile->fullpath,
3332 &theFile->attributes, theFile->c_attributes,
3333 fd, &buf);
3334#endif
3335
3336#if defined(USE_XATTR)
3337 if (sh_unix_check_selinux == S_TRUE)
3338 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
3339#elif defined(USE_ACL)
3340 if (sh_unix_check_acl == S_TRUE)
3341 theFile->attr_string = sh_unix_getinfo_acl (theFile->fullpath, fd, &buf);
3342#else
3343 theFile->attr_string = NULL;
3344#endif
3345
3346 if (!SL_ISERROR(rval_open))
3347 sl_close(rval_open);
3348
3349
3350 /* --- I/O limit. ---
3351 */
3352 if (IO_Limit > 0)
3353 {
3354 runtim = (long) (time(NULL) - sh.statistics.time_start);
3355
3356 if (runtim > 0 && (long)(sh.statistics.bytes_hashed/runtim) > IO_Limit)
3357 retry_msleep(1, 0);
3358 }
3359
3360 /* --- Determine permissions. ---
3361 */
3362 sh_unix_getinfo_mode (&buf, &mode, theFile->c_mode);
3363
3364 /* --- Trivia. ---
3365 */
3366 theFile->dev = buf.st_dev;
3367 theFile->ino = buf.st_ino;
3368 theFile->mode = buf.st_mode;
3369 theFile->hardlinks = buf.st_nlink;
3370 theFile->owner = buf.st_uid;
3371 theFile->group = buf.st_gid;
3372 theFile->rdev = buf.st_rdev;
3373 theFile->size = buf.st_size;
3374 theFile->blksize = (unsigned long) buf.st_blksize;
3375 theFile->blocks = (unsigned long) buf.st_blocks;
3376 theFile->atime = buf.st_atime;
3377 theFile->mtime = buf.st_mtime;
3378 theFile->ctime = buf.st_ctime;
3379
3380
3381 /* --- Owner and group. ---
3382 */
3383
3384 if ( (name = sh_unix_getGIDname(SH_ERR_ALL,
3385 buf.st_gid)) != NULL) {
3386 sl_strlcpy (theFile->c_group, name, GROUP_MAX+1);
3387 } else {
3388
3389 tmp2 = sh_util_safe_name (theFile->fullpath);
3390
3391 if (policy == SH_LEVEL_ALLIGNORE)
3392 {
3393 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
3394 MSG_FI_NOGRP,
3395 (long) buf.st_gid, tmp2);
3396 }
3397 else
3398 {
3399 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
3400 MSG_FI_NOGRP,
3401 (long) buf.st_gid, tmp2);
3402 }
3403 SH_FREE(tmp2);
3404 sl_snprintf(theFile->c_group, GROUP_MAX+1, "%d", (long) buf.st_gid);
3405 }
3406
3407
3408 if ( (name = sh_unix_getUIDname(SH_ERR_ALL,
3409 buf.st_uid)) != NULL) {
3410 sl_strlcpy (theFile->c_owner, name, USER_MAX+1);
3411 } else {
3412
3413 tmp2 = sh_util_safe_name (theFile->fullpath);
3414
3415 if (policy == SH_LEVEL_ALLIGNORE)
3416 {
3417 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
3418 MSG_FI_NOUSR,
3419 (long) buf.st_uid, tmp2);
3420 }
3421 else
3422 {
3423 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
3424 MSG_FI_NOUSR,
3425 (long) buf.st_uid, tmp2);
3426 }
3427 SH_FREE(tmp2);
3428 sl_snprintf(theFile->c_owner, USER_MAX+1, "%d", (long) buf.st_uid);
3429 }
3430
3431 /* --- Output the file. ---
3432 */
3433 if (flag_err_debug == SL_TRUE)
3434 {
3435 tmp2 = sh_util_safe_name ((filename == NULL) ?
3436 theFile->fullpath : filename);
3437 sl_strlcpy(timestr, sh_unix_time(theFile->mtime), 81);
3438 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LIST,
3439 theFile->c_mode,
3440 theFile->hardlinks,
3441 theFile->c_owner,
3442 theFile->c_group,
3443 (unsigned long) theFile->size,
3444 timestr,
3445 tmp2);
3446 SH_FREE(tmp2);
3447 }
3448
3449 /* --- Check for links. ---
3450 */
3451 if (theFile->c_mode[0] == 'l')
3452 {
3453
3454 linknamebuf = SH_ALLOC(PATH_MAX);
3455
3456 /* flawfinder: ignore */
3457 linksize = readlink (theFile->fullpath, linknamebuf, PATH_MAX-1);
3458
3459 if (linksize < (PATH_MAX-1) && linksize >= 0)
3460 linknamebuf[linksize] = '\0';
3461 else
3462 linknamebuf[PATH_MAX-1] = '\0';
3463
3464 if (linksize < 0)
3465 {
3466 linksize = errno;
3467 tmp2 = sh_util_safe_name (theFile->fullpath);
3468 sh_error_handle (level, FIL__, __LINE__, linksize, MSG_FI_RDLNK,
3469 sh_error_message (linksize), tmp2);
3470 SH_FREE(tmp2);
3471 SH_FREE(linknamebuf);
3472 theFile->linkpath[0] = '-';
3473 theFile->linkpath[1] = '\0';
3474 SL_RETURN((-1),_("sh_unix_getinfo"));
3475 }
3476
3477 if (linknamebuf[0] == '/')
3478 {
3479 sl_strlcpy (theFile->linkpath, linknamebuf, PATH_MAX);
3480 }
3481 else
3482 {
3483 tmp = sh_util_dirname(theFile->fullpath);
3484 sl_strlcpy (theFile->linkpath,
3485 tmp,
3486 PATH_MAX);
3487 SH_FREE(tmp);
3488 sl_strlcat (theFile->linkpath,
3489 "/", PATH_MAX);
3490 sl_strlcat (theFile->linkpath,
3491 linknamebuf,
3492 PATH_MAX);
3493 }
3494
3495 /* stat the link
3496 */
3497 stat_return = retry_lstat (FIL__, __LINE__, theFile->linkpath, &lbuf);
3498
3499 /* check for error
3500 */
3501 if (stat_return != 0)
3502 {
3503 stat_return = errno;
3504 tmp = sh_util_safe_name (theFile->fullpath);
3505 tmp2 = sh_util_safe_name (theFile->linkpath);
3506 if (stat_return != ENOENT)
3507 {
3508 sh_error_handle (level, FIL__, __LINE__, stat_return,
3509 MSG_FI_LSTAT,
3510 sh_error_message (stat_return), tmp2);
3511 }
3512 else
3513 {
3514 /* a dangling link -- everybody seems to have plenty of them
3515 */
3516 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_DLNK,
3517 tmp, tmp2);
3518 }
3519 theFile->linkisok = BAD;
3520 SH_FREE(tmp);
3521 SH_FREE(tmp2);
3522 SH_FREE(linknamebuf);
3523 /*
3524 * changed Tue Feb 10 16:16:13 CET 2004:
3525 * add dangling symlinks into database
3526 * SL_RETURN((-1),_("sh_unix_getinfo"));
3527 */
3528 theFile->linkmode = 0;
3529 SL_RETURN((0),_("sh_unix_getinfo"));
3530 }
3531
3532 theFile->linkisok = GOOD;
3533
3534
3535 /* --- Determine file type. ---
3536 */
3537 sh_unix_getinfo_type (&lbuf, &type, theFile->link_c_mode);
3538 theFile->type = type;
3539
3540 /* --- Determine permissions. ---
3541 */
3542 sh_unix_getinfo_mode (&lbuf, &mode, theFile->link_c_mode);
3543 theFile->linkmode = lbuf.st_mode;
3544
3545 /* --- Output the link. ---
3546 */
3547 if (theFile->linkisok == GOOD)
3548 {
3549 tmp2 = sh_util_safe_name (linknamebuf);
3550 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LLNK,
3551 theFile->link_c_mode, tmp2);
3552 SH_FREE(tmp2);
3553 }
3554 SH_FREE(linknamebuf);
3555 }
3556 SL_RETURN((0),_("sh_unix_getinfo"));
3557}
3558
3559/* #if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE) */
3560#endif
3561
3562int sh_unix_unlock (char * lockfile, char * flag);
3563int sh_unix_lock (char * lockfile, char * flag);
3564
3565/* check whether file is locked
3566 */
3567int sh_unix_test_and_lock (char * filename, char * lockfile)
3568{
3569 static struct stat buf;
3570 int status = 0;
3571
3572
3573 SL_TICKET fd;
3574 char line_in[128];
3575
3576 SL_ENTER(_("sh_unix_test_and_lock"));
3577
3578 status = retry_lstat (FIL__, __LINE__, lockfile, &buf);
3579
3580 /* --- No lock file found, try to lock. ---
3581 */
3582
3583 if (status < 0 && errno == ENOENT)
3584 {
3585 if (0 == sh_unix_lock (lockfile, filename))
3586 {
3587 if (filename != NULL)
3588 sh.flag.islocked = GOOD;
3589 SL_RETURN((0),_("sh_unix_test_and_lock"));
3590 }
3591 else
3592 {
3593 sh_error_handle ((-1), FIL__, __LINE__, status,
3594 MSG_E_SUBGEN,
3595 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
3596 _("sh_unix_test_and_lock"));
3597 SL_RETURN((-1),_("sh_unix_test_and_lock"));
3598 }
3599 }
3600 else if (status == 0 && buf.st_size == 0)
3601 {
3602 if (filename != NULL)
3603 sh.flag.islocked = GOOD;
3604 sh_unix_unlock (lockfile, filename);
3605 if (filename != NULL)
3606 sh.flag.islocked = BAD;
3607 if (0 == sh_unix_lock (lockfile, filename))
3608 {
3609 if (filename != NULL)
3610 sh.flag.islocked = GOOD;
3611 SL_RETURN((0),_("sh_unix_test_and_lock"));
3612 }
3613 else
3614 {
3615 sh_error_handle ((-1), FIL__, __LINE__, status,
3616 MSG_E_SUBGEN,
3617 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
3618 _("sh_unix_test_and_lock"));
3619 SL_RETURN((-1),_("sh_unix_test_and_lock"));
3620 }
3621 }
3622
3623 /* --- Check on lock. ---
3624 */
3625
3626 if (status >= 0)
3627 {
3628 fd = sl_open_read (lockfile, SL_YESPRIV);
3629 if (SL_ISERROR(fd))
3630 sh_error_handle ((-1), FIL__, __LINE__, fd,
3631 MSG_E_SUBGEN,
3632 (filename == NULL) ? _("Cannot open PID file for read") : _("Cannot open lock file for read"),
3633 _("sh_unix_test_and_lock"));
3634 }
3635 else
3636 fd = -1;
3637
3638 if (!SL_ISERROR(fd))
3639 {
3640 /* read the PID in the lock file
3641 */
3642 status = sl_read (fd, line_in, sizeof(line_in));
3643 line_in[sizeof(line_in)-1] = '\0';
3644
3645 /* convert to numeric
3646 */
3647 if (status > 0)
3648 {
3649 errno = 0;
3650 status = strtol(line_in, (char **)NULL, 10);
3651 if (errno == ERANGE || status <= 0)
3652 {
3653 sh_error_handle ((-1), FIL__, __LINE__, status,
3654 MSG_E_SUBGEN,
3655 (filename == NULL) ? _("Bad PID in PID file") : _("Bad PID in lock file"),
3656 _("sh_unix_test_and_lock"));
3657
3658 status = -1;
3659 }
3660 }
3661 else
3662 {
3663 sh_error_handle ((-1), FIL__, __LINE__, status,
3664 MSG_E_SUBGEN,
3665 (filename == NULL) ? _("Cannot read PID file") : _("Cannot read lock file"),
3666 _("sh_unix_test_and_lock"));
3667 }
3668 sl_close(fd);
3669
3670 if (status == (int) getpid())
3671 {
3672 if (filename != NULL)
3673 sh.flag.islocked = GOOD;
3674 SL_RETURN((0),_("sh_unix_test_and_lock"));
3675 }
3676
3677
3678 /* --- Check whether the process exists. ---
3679 */
3680 if (status > 0)
3681 {
3682 errno = 0;
3683 status = aud_kill (FIL__, __LINE__, status, 0);
3684
3685 /* Does not exist, so remove the stale lock
3686 * and create a new one.
3687 */
3688 if (status < 0 && errno == ESRCH)
3689 {
3690 if (filename != NULL)
3691 sh.flag.islocked = GOOD;
3692 if (0 != sh_unix_unlock(lockfile, filename) && (filename !=NULL))
3693 sh.flag.islocked = BAD;
3694 else
3695 {
3696 if (0 == sh_unix_lock (lockfile, filename))
3697 {
3698 if (filename != NULL)
3699 sh.flag.islocked = GOOD;
3700 SL_RETURN((0),_("sh_unix_test_and_lock"));
3701 }
3702 else
3703 {
3704 sh_error_handle ((-1), FIL__, __LINE__, status,
3705 MSG_E_SUBGEN,
3706 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
3707 _("sh_unix_test_and_lock"));
3708 }
3709 if (filename != NULL)
3710 sh.flag.islocked = BAD;
3711 }
3712 }
3713 else
3714 {
3715 sh_error_handle ((-1), FIL__, __LINE__, status,
3716 MSG_E_SUBGEN,
3717 (filename == NULL) ? _("Cannot remove stale PID file, PID may be a running process") : _("Cannot remove stale lock file, PID may be a running process"),
3718 _("sh_unix_test_and_lock"));
3719 if (filename != NULL)
3720 sh.flag.islocked = BAD;
3721 }
3722 }
3723 }
3724 SL_RETURN((-1),_("sh_unix_testlock"));
3725}
3726
3727/* write the PID file
3728 */
3729int sh_unix_write_pid_file()
3730{
3731 return sh_unix_test_and_lock(NULL, sh.srvlog.alt);
3732}
3733
3734/* write lock for filename
3735 */
3736int sh_unix_write_lock_file(char * filename)
3737{
3738 size_t len;
3739 int res;
3740 char * lockfile;
3741
3742 if (filename == NULL)
3743 return (-1);
3744
3745 len = sl_strlen(filename);
3746 if (sl_ok_adds(len, 6))
3747 len += 6;
3748 lockfile = SH_ALLOC(len);
3749 sl_strlcpy(lockfile, filename, len);
3750 sl_strlcat(lockfile, _(".lock"), len);
3751 res = sh_unix_test_and_lock(filename, lockfile);
3752 SH_FREE(lockfile);
3753 return res;
3754}
3755
3756int sh_unix_unlock(char * lockfile, char * flag)
3757{
3758 int error = 0;
3759
3760 SL_ENTER(_("sh_unix_unlock"));
3761
3762 /* --- Logfile is not locked to us. ---
3763 */
3764 if (sh.flag.islocked == BAD && flag != NULL)
3765 SL_RETURN((-1),_("sh_unix_unlock"));
3766
3767 /* --- Check whether the directory is secure. ---
3768 */
3769 if (0 != tf_trust_check (lockfile, SL_YESPRIV))
3770 SL_RETURN((-1),_("sh_unix_unlock"));
3771
3772 /* --- Delete the lock file. ---
3773 */
3774 error = retry_aud_unlink (FIL__, __LINE__, lockfile);
3775
3776 if (error == 0)
3777 {
3778 if (flag != NULL)
3779 sh.flag.islocked = BAD; /* not locked anymore */
3780 }
3781 else if (flag != NULL)
3782 {
3783 error = errno;
3784 sh_error_handle ((-1), FIL__, __LINE__, error, MSG_E_UNLNK,
3785 sh_error_message(error), lockfile);
3786 SL_RETURN((-1),_("sh_unix_unlock"));
3787 }
3788 SL_RETURN((0),_("sh_unix_unlock"));
3789}
3790
3791/* rm lock for filename
3792 */
3793int sh_unix_rm_lock_file(char * filename)
3794{
3795 size_t len;
3796 int res;
3797 char * lockfile;
3798
3799 if (filename == NULL)
3800 return (-1);
3801
3802 len = sl_strlen(filename);
3803 if (sl_ok_adds(len, 6))
3804 len += 6;
3805 lockfile = SH_ALLOC(len);
3806 sl_strlcpy(lockfile, filename, len);
3807 sl_strlcat(lockfile, _(".lock"), len);
3808
3809 res = sh_unix_unlock(lockfile, filename);
3810 SH_FREE(lockfile);
3811 return res;
3812}
3813
3814/* rm lock for filename
3815 */
3816int sh_unix_rm_pid_file()
3817{
3818 return sh_unix_unlock(sh.srvlog.alt, NULL);
3819}
3820
3821int sh_unix_lock (char * lockfile, char * flag)
3822{
3823 int filed;
3824 int errnum;
3825 char myPid[64];
3826 SL_TICKET fd;
3827 extern int get_the_fd (SL_TICKET ticket);
3828
3829 SL_ENTER(_("sh_unix_lock"));
3830
3831 sprintf (myPid, "%ld\n", (long) getpid()); /* known to fit */
3832
3833 fd = sl_open_safe_rdwr (lockfile, SL_YESPRIV); /* fails if file exists */
3834
3835 if (!SL_ISERROR(fd))
3836 {
3837 errnum = sl_write (fd, myPid, sl_strlen(myPid));
3838 filed = get_the_fd(fd);
3839 fchmod (filed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
3840 sl_close (fd);
3841
3842 if (!SL_ISERROR(errnum))
3843 {
3844 if (flag != NULL)
3845 sh.flag.islocked = GOOD;
3846 SL_RETURN((0),_("sh_unix_lock"));
3847 }
3848 }
3849
3850 TPT((0, FIL__, __LINE__, _("msg=<open pid file failed>\n")));
3851 if (flag != NULL)
3852 sh.flag.islocked = BAD;
3853 SL_RETURN((-1),_("sh_unix_lock"));
3854
3855 /* notreached */
3856}
3857
3858/* Test whether file exists
3859 */
3860int sh_unix_file_exists(char * path)
3861{
3862 struct stat buf;
3863
3864 SL_ENTER(_("sh_unix_file_exists"));
3865
3866 if (-1 == retry_stat(FIL__, __LINE__, path, &buf))
3867 SL_RETURN( S_FALSE, _("sh_unix_file_exists"));
3868 else
3869 SL_RETURN( S_TRUE, _("sh_unix_file_exists"));
3870}
3871
3872
3873/* Test whether file exists, is a character device, and allows read
3874 * access.
3875 */
3876int sh_unix_device_readable(int fd)
3877{
3878 struct stat buf;
3879
3880 SL_ENTER(_("sh_unix_device_readable"));
3881
3882 if (retry_fstat(FIL__, __LINE__, fd, &buf) == -1)
3883 SL_RETURN( (-1), _("sh_unix_device_readable"));
3884 else if ( S_ISCHR(buf.st_mode) && 0 != (S_IROTH & buf.st_mode) )
3885 SL_RETURN( (0), _("sh_unix_device_readable"));
3886 else
3887 SL_RETURN( (-1), _("sh_unix_device_readable"));
3888}
3889
3890static char preq[16];
3891
3892/* return true if database is remote
3893 */
3894int file_is_remote ()
3895{
3896 static int init = 0;
3897 struct stat buf;
3898
3899 SL_ENTER(_("file_is_remote"));
3900
3901 if (init == 0)
3902 {
3903 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
3904 ++init;
3905 }
3906 if (0 == sl_strncmp (sh.data.path, preq, 15))
3907 {
3908 if (sh.data.path[15] != '\0') /* should be start of path */
3909 {
3910 if (0 == stat(&(sh.data.path[15]), &buf))
3911 {
3912 SL_RETURN( S_FALSE, _("file_is_remote"));
3913 }
3914 }
3915 SL_RETURN( S_TRUE, _("file_is_remote"));
3916 }
3917 SL_RETURN( S_FALSE, _("file_is_remote"));
3918}
3919
3920/* Return the path to the configuration/database file.
3921 */
3922char * file_path(char what, char flag)
3923{
3924 static int init = 0;
3925
3926 SL_ENTER(_("file_path"));
3927
3928 if (init == 0)
3929 {
3930 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
3931 ++init;
3932 }
3933
3934 switch (what)
3935 {
3936
3937 case 'C':
3938 if (0 == sl_strncmp (sh.conf.path, preq, 15))
3939 {
3940#if defined(SH_WITH_SERVER)
3941 if (sh.flag.isserver == S_TRUE && sl_strlen(sh.conf.path) == 15)
3942 SL_RETURN( NULL, _("file_path"));
3943 if (sh.flag.isserver == S_TRUE)
3944 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
3945#endif
3946 if (flag == 'R')
3947 SL_RETURN( preq, _("file_path"));
3948 if (flag == 'I')
3949 {
3950 if (sl_strlen(sh.conf.path) == 15)
3951 SL_RETURN( NULL, _("file_path"));
3952 else
3953 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
3954 }
3955 SL_RETURN ( preq, _("file_path"));
3956 }
3957 else
3958 SL_RETURN( sh.conf.path, _("file_path"));
3959 /* break; *//* unreachable */
3960
3961 case 'D':
3962 if (0 == sl_strncmp (sh.data.path, preq, 15))
3963 {
3964 if (flag == 'R')
3965 SL_RETURN( preq, _("file_path"));
3966 if (flag == 'W' && sl_strlen(sh.data.path) == 15)
3967 SL_RETURN (NULL, _("file_path"));
3968 if (flag == 'W')
3969 SL_RETURN( &(sh.data.path[15]), _("file_path"));
3970 }
3971 else
3972 SL_RETURN( sh.data.path, _("file_path"));
3973 break;
3974
3975 default:
3976 SL_RETURN( NULL, _("file_path"));
3977 }
3978
3979 return NULL; /* notreached */
3980}
3981/************************************************/
3982/**** Mlock Utilities ****/
3983/************************************************/
3984
3985#include <limits.h>
3986
3987int sh_unix_pagesize()
3988{
3989 int pagesize = 4096;
3990#if defined(_SC_PAGESIZE)
3991 pagesize = sysconf(_SC_PAGESIZE);
3992#elif defined(_SC_PAGE_SIZE)
3993 pagesize = sysconf(_SC_PAGE_SIZE);
3994#elif defined(HAVE_GETPAGESIZE)
3995 pagesize = getpagesize();
3996#elif defined(PAGESIZE)
3997 pagesize = PAGESIZE;
3998#endif
3999
4000 return ((pagesize > 0) ? pagesize : 4096);
4001}
4002
4003typedef struct sh_page_lt {
4004 unsigned long page_start;
4005 int page_refcount;
4006 char file[64];
4007 int line;
4008 struct sh_page_lt * next;
4009} sh_page_l;
4010
4011sh_page_l * sh_page_locked = NULL;
4012volatile int page_locking = 0;
4013
4014unsigned long sh_unix_lookup_page (void * in_addr, size_t len, int * num_pages)
4015{
4016 int pagesize = sh_unix_pagesize();
4017 unsigned long addr = (unsigned long) in_addr;
4018
4019 unsigned long pagebase;
4020 unsigned long pagediff;
4021 unsigned long pagenum = addr / pagesize;
4022
4023 SL_ENTER(_("sh_unix_lookup_page"));
4024#if 0
4025 fprintf(stderr, "mlock: --> base %ld, pagenum: %ld\n",
4026 addr, pagenum);
4027#endif
4028
4029 /* address of first page
4030 */
4031 pagebase = pagenum * pagesize;
4032
4033 /* number of pages
4034 */
4035 pagediff = (addr + len) - pagebase;
4036 pagenum = pagediff / pagesize;
4037 if (pagenum * pagesize < pagediff)
4038 ++pagenum;
4039
4040#if 0
4041 fprintf(stderr, "mlock: --> pagebase %ld, pagediff %ld, (addr + len) %ld\n",
4042 pagebase, pagediff, (addr + len));
4043#endif
4044
4045 *num_pages = pagenum;
4046 SL_RETURN((pagebase), _("sh_unix_lookup_page"));
4047}
4048
4049
4050#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
4051int sh_unix_mlock (char * file, int line, void * in_addr, size_t len)
4052{
4053 int num_pages;
4054 int status = 0;
4055 int pagesize;
4056 sh_page_l * page_list = sh_page_locked;
4057 unsigned long addr;
4058#ifdef TEST_MLOCK
4059 int i = 0;
4060#endif
4061
4062 SL_ENTER(_("sh_unix_mlock"));
4063
4064 if (0 != page_locking)
4065 {
4066 SL_RETURN((-1), _("sh_unix_mlock"));
4067 }
4068 page_locking = 1;
4069
4070 pagesize = sh_unix_pagesize();
4071 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
4072
4073#ifdef TEST_MLOCK
4074 fprintf(stderr, "mlock: addr %ld, base %ld, pages: %d, length %d\n",
4075 (unsigned long) in_addr, addr, num_pages, len);
4076#endif
4077
4078 /* increase refcount of locked pages
4079 * addr is first page; num_pages is #(consecutive pages) to lock
4080 */
4081 while ((page_list != NULL) && (num_pages > 0))
4082 {
4083#ifdef TEST_MLOCK
4084 fprintf(stderr, "mlock: check page %d: %ld [%d]\n",
4085 i, page_list->page_start, page_list->page_refcount);
4086#endif
4087 if (page_list->page_start == addr)
4088 {
4089 page_list->page_refcount += 1;
4090 num_pages -= 1;
4091 addr += pagesize;
4092#ifdef TEST_MLOCK
4093 fprintf(stderr, "mlock: found page %d: %ld [%d], next page %ld\n",
4094 i, page_list->page_start, page_list->page_refcount, addr);
4095#endif
4096 }
4097#ifdef TEST_MLOCK
4098 ++i;
4099#endif
4100 page_list = page_list->next;
4101 }
4102
4103 /* mlock some more pages, if needed
4104 */
4105 while (num_pages > 0)
4106 {
4107#ifdef TEST_MLOCK
4108 fprintf(stderr, "mlock: lock page %d: mlock %ld [num_pages %d]\n",
4109 i, addr, num_pages);
4110 ++i;
4111#endif
4112 page_list = SH_ALLOC(sizeof(sh_page_l));
4113 page_list->page_start = addr;
4114 page_list->page_refcount = 1;
4115 sl_strlcpy(page_list->file, file, 64);
4116 page_list->line = line;
4117 status = mlock( (void *) addr, pagesize);
4118 if (status != 0)
4119 {
4120#ifdef TEST_MLOCK
4121 fprintf(stderr, "mlock: error: %s\n", sh_error_message(errno));
4122#endif
4123 SH_FREE(page_list);
4124 page_locking = 0;
4125 SL_RETURN((status), _("sh_unix_mlock"));
4126 }
4127 page_list->next = sh_page_locked;
4128 sh_page_locked = page_list;
4129 num_pages -= 1;
4130 addr += pagesize;
4131 }
4132
4133 page_locking = 0;
4134 SL_RETURN((status), _("sh_unix_mlock"));
4135}
4136#else
4137int sh_unix_mlock (char * file, int line, void * in_addr, size_t len)
4138{
4139 (void) file; (void) line;
4140 (void) in_addr; (void) len;
4141 return -1;
4142}
4143#endif
4144
4145#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
4146int sh_unix_munlock (void * in_addr, size_t len)
4147{
4148 int num_pages;
4149 int unlocked = 0;
4150 int status = 0;
4151 int pagesize;
4152 sh_page_l * page_list = sh_page_locked;
4153 sh_page_l * page_last;
4154 unsigned long addr;
4155
4156 int test_count;
4157 int test_status;
4158 int test_pages;
4159
4160#ifdef TEST_MLOCK
4161 int i = 0;
4162#endif
4163
4164 SL_ENTER(_("sh_unix_munlock"));
4165
4166 if (0 != page_locking)
4167 {
4168 SL_RETURN((-1), _("sh_unix_munlock"));
4169 }
4170 page_locking = 1;
4171
4172 pagesize = sh_unix_pagesize();
4173 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
4174
4175#ifdef TEST_MLOCK
4176 fprintf(stderr, "munlock: in_addr %ld, addr %ld, pages: %d, length %d\n",
4177 (unsigned long) in_addr, addr, num_pages, len);
4178#endif
4179
4180 test_pages = num_pages;
4181
4182 /* reduce refcount of locked pages
4183 * addr is first page; num_pages is #(consecutive pages) to lock
4184 */
4185 while ((page_list != NULL) && (num_pages > 0))
4186 {
4187#ifdef TEST_MLOCK
4188 fprintf(stderr, "munlock: page %d: %ld [%d]\n",
4189 i, page_list->page_start, page_list->page_refcount);
4190#endif
4191
4192 test_status = 0;
4193 for (test_count = 0; test_count < test_pages; ++test_count)
4194 {
4195 if (page_list->page_start == (addr + (test_count * pagesize)))
4196 {
4197 test_status = 1;
4198 break;
4199 }
4200 }
4201
4202 if (test_status == 1)
4203 {
4204 page_list->page_refcount -= 1;
4205 if (page_list->page_refcount == 0)
4206 {
4207 status = munlock ( (void *) addr, pagesize);
4208 ++unlocked;
4209 }
4210 num_pages -= 1;
4211#ifdef TEST_MLOCK
4212 fprintf(stderr,
4213 "munlock: page %d: %ld [refcount %d], refcount reduced\n",
4214 i, page_list->page_start, page_list->page_refcount);
4215#endif
4216 }
4217#ifdef TEST_MLOCK
4218 ++i;
4219#endif
4220 page_list = page_list->next;
4221 }
4222
4223#ifdef TEST_MLOCK
4224 i = 0;
4225#endif
4226
4227 if (unlocked > 0)
4228 {
4229 page_list = sh_page_locked;
4230 page_last = sh_page_locked;
4231
4232 while ((page_list != NULL) && (unlocked > 0))
4233 {
4234 if (page_list->page_refcount == 0)
4235 {
4236#ifdef TEST_MLOCK
4237 fprintf(stderr, "munlock: remove page %d: %ld [refcount %d]\n",
4238 i, page_list->page_start, page_list->page_refcount);
4239#endif
4240 if (page_last != page_list)
4241 {
4242 page_last->next = page_list->next;
4243 SH_FREE(page_list);
4244 page_list = page_last->next;
4245 }
4246 else
4247 {
4248 page_last = page_list->next;
4249 if (page_list == sh_page_locked)
4250 sh_page_locked = page_list->next;
4251 SH_FREE(page_list);
4252 page_list = page_last;
4253 }
4254 --unlocked;
4255 }
4256 else
4257 {
4258#ifdef TEST_MLOCK
4259 fprintf(stderr, "munlock: skip page %d: %ld [refcount %d]\n",
4260 i, page_list->page_start, page_list->page_refcount);
4261#endif
4262
4263 page_last = page_list;
4264 page_list = page_list->next;
4265 }
4266#ifdef TEST_MLOCK
4267 ++i;
4268#endif
4269 }
4270 }
4271
4272 page_locking = 0;
4273 SL_RETURN((status), _("sh_unix_munlock"));
4274}
4275#else
4276int sh_unix_munlock (void * in_addr, size_t len)
4277{
4278 (void) in_addr; (void) len;
4279 return -1;
4280}
4281#endif
4282
4283int sh_unix_count_mlock()
4284{
4285 int i = 0;
4286 char str[128];
4287 sh_page_l * page_list = sh_page_locked;
4288
4289 SL_ENTER(_("sh_unix_count_mlock"));
4290 while (page_list != NULL)
4291 {
4292#ifdef WITH_TPT
4293 sl_snprintf(str, sizeof(str), _("file: %s line: %d page: %d"),
4294 page_list->file, page_list->line, i+1);
4295 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, i, MSG_E_SUBGEN,
4296 str, _("sh_unix_count_mlock"));
4297#endif
4298 page_list = page_list->next;
4299 ++i;
4300 }
4301 sl_snprintf(str, sizeof(str), _("%d pages locked"), i);
4302 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, i, MSG_E_SUBGEN,
4303 str, _("sh_unix_count_mlock"));
4304 SL_RETURN((i), _("sh_unix_count_mlock"));
4305}
4306
4307/************************************************/
4308/************************************************/
4309/**** Stealth Utilities ****/
4310/************************************************/
4311/************************************************/
4312#ifdef SH_STEALTH
4313
4314void sh_unix_xor_code (char * str, int len)
4315{
4316 register int i;
4317
4318 for (i = 0; i < len; ++i) str[i] ^= (char) XOR_CODE;
4319 return;
4320}
4321
4322#if !defined(SH_STEALTH_MICRO)
4323
4324
4325int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len);
4326unsigned long first_hex_block(SL_TICKET fd, unsigned long * max);
4327
4328/*
4329 * --- Get hidden data from a block of hex data. ---
4330 */
4331int sh_unix_getline_stealth (SL_TICKET fd, char * str, int len)
4332{
4333 int add_off, llen;
4334 static unsigned long off_data = 0;
4335 static unsigned long max_data = 0;
4336 static int stealth_init = BAD;
4337
4338 SL_ENTER(_("sh_unix_getline_stealth"));
4339
4340
4341 /* --- Initialize. ---
4342 */
4343 if (stealth_init == BAD)
4344 {
4345 off_data = first_hex_block(fd, &max_data);
4346 if (off_data == 0)
4347 {
4348 dlog(1, FIL__, __LINE__,
4349 _("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"));
4350 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
4351 _("Stealth config file."));
4352 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
4353 }
4354 stealth_init = GOOD;
4355 max_data += off_data;
4356 }
4357
4358 /* --- Seek to proper position. ---
4359 */
4360 if (off_data >= max_data)
4361 {
4362 dlog(1, FIL__, __LINE__,
4363 _("The capacity of the container image file for the stealth config file seems to be too small. Your config file is likely truncated.\n"));
4364 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
4365 _("Stealth config file."));
4366 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
4367 }
4368 sl_seek(fd, off_data);
4369
4370 /* --- Read one line. ---
4371 */
4372 add_off = hideout_hex_block(fd, (unsigned char *) str, len);
4373 off_data += add_off;
4374
4375 llen = sl_strlen(str);
4376 SL_RETURN(llen, _("sh_unix_getline_stealth"));
4377}
4378
4379int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len)
4380{
4381
4382 register int i, j, k;
4383 unsigned char c, e;
4384 register int num;
4385 unsigned char mask[9] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
4386 unsigned long here = 0;
4387 unsigned long retval = 0;
4388
4389 SL_ENTER(_("hideout_hex_block"));
4390
4391 ASSERT_RET((len > 1), _("len > 1"), (0));
4392
4393 --len;
4394
4395 i = 0;
4396 while (i < len)
4397 {
4398 for (j = 0; j < 8; ++j)
4399 {
4400
4401 /* --- Get a low byte, modify, read back. ---
4402 */
4403 for (k = 0; k < 2; ++k)
4404 {
4405 /* -- Skip whitespace. ---
4406 */
4407 c = ' ';
4408 do {
4409 do {
4410 num = sl_read (fd, &c, 1);
4411 } while (num == 0 && errno == EINTR);
4412 if (num == 0)
4413 SL_RETURN((0), _("hideout_hex_block"));
4414 ++here;
4415 } while (c == '\n' || c == '\t' || c == '\r' ||
4416 c == ' ');
4417 }
4418
4419
4420 /* --- e is the value of the low byte. ---
4421 */
4422 e = (unsigned char) sh_util_hexchar( c );
4423 if ((e & mask[7]) != 0) /* bit is set */
4424 str[i] |= mask[j];
4425 else /* bit is not set */
4426 str[i] &= ~mask[j];
4427
4428 }
4429 if (str[i] == '\n') break;
4430 ++i;
4431 }
4432
4433 if (i != 0)
4434 str[i] = '\0';
4435 else
4436 str[i+1] = '\0'; /* keep newline and terminate */
4437 retval += here;
4438
4439 SL_RETURN(retval, _("hideout_hex_block"));
4440}
4441
4442/* --- Get offset of first data block. ---
4443 */
4444unsigned long first_hex_block(SL_TICKET fd, unsigned long * max)
4445{
4446 unsigned int i;
4447 long num = 1;
4448 unsigned long lnum;
4449 char c;
4450 int nothex = 0;
4451 unsigned long retval = 0;
4452 unsigned int this_line = 0;
4453 char theline[SH_BUFSIZE];
4454
4455 SL_ENTER(_("first_hex_block"));
4456
4457 *max = 0;
4458
4459 while (1)
4460 {
4461 theline[0] = '\0';
4462 this_line = 0;
4463 c = '\0';
4464 while (c != '\n' && num > 0 && this_line < (sizeof(theline)-1))
4465 {
4466 do {
4467 num = sl_read (fd, &c, 1);
4468 } while (num == 0 && errno == EINTR);
4469 if (num > 0)
4470 theline[this_line] = c;
4471 else
4472 SL_RETURN((0), _("first_hex_block"));
4473 ++this_line;
4474 }
4475 theline[this_line] = '\0';
4476
4477 /* not only 'newline' */
4478 if (this_line > 60)
4479 {
4480 nothex = 0;
4481 i = 0;
4482 while (nothex == 0 && i < (this_line-1))
4483 {
4484 if (! isxdigit((int)theline[i])) nothex = 1;
4485 ++i;
4486 }
4487 if (nothex == 1) retval += this_line;
4488 }
4489 else
4490 {
4491 nothex = 1;
4492 retval += this_line;
4493 }
4494
4495 if (nothex == 0)
4496 {
4497 *max = 0;
4498 do {
4499 do {
4500 num = sl_read (fd, theline, SH_BUFSIZE);
4501 } while (num == 0 && errno == EINTR);
4502 if (num > 0)
4503 {
4504 lnum = (unsigned long) num;
4505 for (i = 0; i < lnum; ++i)
4506 {
4507 c = theline[i];
4508 if (c == '\n' || c == '\t' || c == '\r' || c == ' ')
4509 ;
4510 else if (!isxdigit((int)c))
4511 break;
4512 else
4513 *max += 1;
4514 }
4515 }
4516 } while (num > 0);
4517
4518 *max /= 16;
4519 SL_RETURN((retval), _("first_hex_block"));
4520 }
4521
4522 }
4523 /* SL_RETURN((0), _("first_hex_block")); *//* unreachable */
4524}
4525
4526 /* if !defined(SH_STEALTH_MICRO) */
4527#endif
4528
4529 /* ifdef SH_STEALTH */
4530#endif
4531
4532/*
4533 * anti-debugger code
4534 */
4535#if defined(SCREW_IT_UP)
4536volatile int sh_not_traced = 0;
4537
4538#ifdef HAVE_GETTIMEOFDAY
4539struct timeval save_tv;
4540#endif
4541
4542void sh_sigtrap_handler (int signum)
4543{
4544#ifdef HAVE_GETTIMEOFDAY
4545 struct timeval tv;
4546 long difftv;
4547
4548 gettimeofday(&tv, NULL);
4549 difftv = (tv.tv_sec - save_tv.tv_sec) * 1000000 +
4550 (tv.tv_usec - save_tv.tv_usec);
4551 if (difftv > 500000)
4552 _exit(6);
4553#endif
4554 sh_not_traced += signum;
4555 return;
4556}
4557#endif
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