source: trunk/src/sh_unix.c@ 71

Last change on this file since 71 was 68, checked in by rainer, 18 years ago

Update trunk to samhain 2.3
File size: 103.2 KB
Line 
1/* SAMHAIN file system integrity testing */
2/* Copyright (C) 1999 Rainer Wichmann */
3/* */
4/* This program is free software; you can redistribute it */
5/* and/or modify */
6/* it under the terms of the GNU General Public License as */
7/* published by */
8/* the Free Software Foundation; either version 2 of the License, or */
9/* (at your option) any later version. */
10/* */
11/* This program is distributed in the hope that it will be useful, */
12/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
13/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
14/* GNU General Public License for more details. */
15/* */
16/* You should have received a copy of the GNU General Public License */
17/* along with this program; if not, write to the Free Software */
18/* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20#include "config_xor.h"
21
22
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26#include <ctype.h>
27
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 = 8; /* 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
1850 /* close all file descriptors, and
1851 * open first three streams to /dev/null
1852 */
1853 if (goDaemon == 1)
1854 {
1855 sh_unix_closeall (0, -1); /* if running as daemon */
1856 aud_open(FIL__, __LINE__, SL_NOPRIV, _("/dev/null"), O_RDWR, 0);
1857 retry_aud_dup(FIL__, __LINE__, 0);
1858 retry_aud_dup(FIL__, __LINE__, 0);
1859#if defined(HAVE_LIBPRELUDE)
1860 sh_prelude_reset ();
1861#endif
1862
1863 /* --- wait until parent has exited ---
1864 */
1865 while (1 == 1)
1866 {
1867 errno = 0;
1868 if (0 > aud_kill (FIL__, __LINE__, oldpid, 0) && errno == ESRCH)
1869 {
1870 break;
1871 }
1872 retry_msleep(0, 1);
1873 }
1874
1875 /* write PID file
1876 */
1877 status = sh_unix_write_pid_file();
1878 if (status < 0)
1879 {
1880 sl_get_euid(&uid);
1881 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_PIDFILE,
1882 (long) uid, sh.srvlog.alt);
1883 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1884 }
1885#if defined(SH_WITH_SERVER)
1886 sh_socket_open_int ();
1887#endif
1888 }
1889 else
1890 {
1891 sh_unix_closeall(3, -1); /* if not daemon */
1892#if defined(HAVE_LIBPRELUDE)
1893 sh_prelude_reset ();
1894#endif
1895#if defined(SH_WITH_SERVER)
1896 sh_socket_open_int ();
1897#endif
1898 }
1899
1900 /* chroot (this is a no-op if no chroot dir is specified
1901 */
1902 status = sh_unix_chroot();
1903 if (status < 0)
1904 {
1905 status = errno;
1906 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
1907 sh_error_message(status), _("chroot"));
1908 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1909 }
1910
1911 /* drop capabilities
1912 */
1913 sl_drop_cap();
1914
1915 SL_RETURN((0),_("sh_unix_init"));
1916}
1917
1918/********************************************************
1919 *
1920 * TIME
1921 *
1922 ********************************************************/
1923
1924/* Figure out the time offset of the current timezone
1925 * in a portable way.
1926 */
1927char * t_zone(const time_t * xx)
1928{
1929 struct tm aa;
1930 struct tm bb;
1931 struct tm * cc;
1932 int sign = 0;
1933 int diff = 0;
1934 int hh, mm;
1935 static char tz[64];
1936
1937 SL_ENTER(_("t_zone"));
1938
1939
1940 cc = gmtime (xx);
1941 memcpy (&aa, cc, sizeof(struct tm));
1942 cc = localtime (xx);
1943 memcpy (&bb, cc, sizeof(struct tm));
1944
1945 /* Check for datum wrap-around.
1946 */
1947 if (aa.tm_year < bb.tm_year)
1948 sign = (-1);
1949 else if (aa.tm_mon < bb.tm_mon)
1950 sign = (-1);
1951 else if (aa.tm_mday < bb.tm_mday)
1952 sign = (-1);
1953 else if (bb.tm_year < aa.tm_year)
1954 sign = ( 1);
1955 else if (bb.tm_mon < aa.tm_mon)
1956 sign = ( 1);
1957 else if (bb.tm_mday < aa.tm_mday)
1958 sign = ( 1);
1959
1960 diff = aa.tm_hour * 60 + aa.tm_min;
1961 diff = (bb.tm_hour * 60 + bb.tm_min) - diff;
1962 diff = diff - (sign * 24 * 60); /* datum wrap-around correction */
1963 hh = diff / 60;
1964 mm = diff - (hh * 60);
1965 sprintf (tz, _("%+03d%02d"), hh, mm); /* known to fit */
1966
1967 SL_RETURN(tz, _("t_zone"));
1968}
1969
1970unsigned long sh_unix_longtime ()
1971{
1972 return ((unsigned long)time(NULL));
1973}
1974
1975#ifdef HAVE_GETTIMEOFDAY
1976unsigned long sh_unix_notime ()
1977{
1978 struct timeval tv;
1979
1980 gettimeofday (&tv, NULL);
1981
1982 return ((unsigned long)(tv.tv_sec + tv.tv_usec * 10835 + getpid() + getppid()));
1983
1984}
1985#endif
1986
1987static int count_dev_time = 0;
1988
1989void reset_count_dev_time(void)
1990{
1991 count_dev_time = 0;
1992 return;
1993}
1994
1995int sh_unix_settimeserver (const char * address)
1996{
1997
1998 SL_ENTER(_("sh_unix_settimeserver"));
1999
2000 if (address != NULL && count_dev_time < 2
2001 && sl_strlen(address) < SH_PATHBUF)
2002 {
2003 if (count_dev_time == 0)
2004 sl_strlcpy (sh.srvtime.name, address, SH_PATHBUF);
2005 else
2006 sl_strlcpy (sh.srvtime.alt, address, SH_PATHBUF);
2007
2008 ++count_dev_time;
2009 SL_RETURN((0), _("sh_unix_settimeserver"));
2010 }
2011 SL_RETURN((-1), _("sh_unix_settimeserver"));
2012}
2013
2014
2015#ifdef HAVE_NTIME
2016#define UNIXEPOCH 2208988800UL /* difference between Unix time and net time
2017 * The UNIX EPOCH starts in 1970.
2018 */
2019#include <sys/socket.h>
2020#include <netinet/in.h>
2021#include <arpa/inet.h>
2022#include <netdb.h>
2023#include <ctype.h>
2024#endif
2025
2026/* Timeserver service. */
2027/* define is missing on HP-UX 10.20 */
2028#ifndef IPPORT_TIMESERVER
2029#define IPPORT_TIMESERVER 37
2030#endif
2031
2032char * sh_unix_time (time_t thetime)
2033{
2034
2035 int status;
2036
2037 time_t time_now;
2038 struct tm * time_ptr;
2039 static char AsciiTime[81]; /* local time */
2040 static char RetTime[81]; /* local time */
2041#ifdef SH_USE_XML
2042 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2043#else
2044 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2045#endif
2046
2047#ifdef HAVE_NTIME
2048 int fd; /* network file descriptor */
2049 u_char net_time[4]; /* remote time in network format */
2050 static int failerr = 0; /* no net time */
2051 int fail = 0; /* no net time */
2052 int errflag;
2053 char errmsg[256];
2054 char error_call[SH_MINIBUF];
2055 int error_num;
2056#endif
2057
2058 SL_ENTER(_("sh_unix_time"));
2059
2060#ifdef HAVE_NTIME
2061 if (thetime == 0)
2062 {
2063 if (sh.srvtime.name[0] == '\0')
2064 {
2065 fail = 1;
2066 (void) time (&time_now);
2067 }
2068 else /* have a timeserver address */
2069 {
2070 fd = connect_port_2 (sh.srvtime.name, sh.srvtime.alt,
2071 IPPORT_TIMESERVER,
2072 error_call, &error_num, errmsg, sizeof(errmsg));
2073 if (fd >= 0)
2074 {
2075 if (4 != read_port (fd, (char *) net_time, 4, &errflag, 2))
2076 {
2077 fail = 1;
2078 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2079 MSG_E_NLOST,
2080 _("time"), sh.srvtime.name);
2081 }
2082 close(fd);
2083 }
2084 else
2085 {
2086 sh_error_handle ((-1), FIL__, __LINE__, error_num,
2087 MSG_E_NET, errmsg, error_call,
2088 _("time"), sh.srvtime.name);
2089 fail = 1;
2090 }
2091
2092 if (fail == 0)
2093 {
2094 time_now = ntohl(* (long *) net_time) - UNIXEPOCH;
2095 /* fprintf(stderr, "TIME IS %ld\n", time_now); */
2096 if (failerr == 1) {
2097 failerr = 0;
2098 sh_error_handle ((-1), FIL__, __LINE__, 0,
2099 MSG_E_NEST,
2100 _("time"), sh.srvtime.name);
2101 }
2102 }
2103 else
2104 {
2105 (void) time (&time_now);
2106 if (failerr == 0)
2107 {
2108 failerr = 1;
2109 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2110 MSG_SRV_FAIL,
2111 _("time"), sh.srvtime.name);
2112 }
2113 }
2114 }
2115 }
2116 else
2117 {
2118 time_now = thetime;
2119 }
2120
2121 /* #ifdef HAVE_NTIME */
2122#else
2123
2124 if (thetime == 0)
2125 {
2126 (void) time (&time_now);
2127 }
2128 else
2129 {
2130 time_now = thetime;
2131 }
2132
2133 /* #ifdef HAVE_NTIME */
2134#endif
2135
2136 if (time_now == (-1) )
2137 SL_RETURN( _(deftime), _("sh_unix_time"));
2138 else
2139 time_ptr = localtime (&time_now);
2140
2141 if (time_ptr != NULL)
2142 {
2143 status = strftime (AsciiTime, 80,
2144#ifdef SH_USE_XML
2145 _("%Y-%m-%dT%H:%M:%S%%s"),
2146#else
2147 _("[%Y-%m-%dT%H:%M:%S%%s]"),
2148#endif
2149 time_ptr);
2150
2151 sl_snprintf(RetTime, 80, AsciiTime, t_zone(&time_now));
2152
2153 if ( (status == 0) || (status == 80) )
2154 SL_RETURN( _(deftime), _("sh_unix_time"));
2155 else
2156 SL_RETURN( &RetTime[0], _("sh_unix_time"));
2157 }
2158
2159 /* last resort
2160 */
2161 SL_RETURN( _(deftime), _("sh_unix_time"));
2162}
2163
2164static int sh_unix_use_localtime = S_FALSE;
2165
2166/* whether to use localtime for file timesatams in logs
2167 */
2168int sh_unix_uselocaltime (const char * c)
2169{
2170 int i;
2171 SL_ENTER(_("sh_unix_uselocaltime"));
2172 i = sh_util_flagval(c, &(sh_unix_use_localtime));
2173
2174 SL_RETURN(i, _("sh_unix_uselocaltime"));
2175}
2176
2177char * sh_unix_gmttime (time_t thetime)
2178{
2179
2180 int status;
2181
2182 struct tm * time_ptr;
2183 static char AsciiTime[81]; /* GMT time */
2184#ifdef SH_USE_XML
2185 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2186#else
2187 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2188#endif
2189
2190 SL_ENTER(_("sh_unix_gmttime"));
2191
2192 if (sh_unix_use_localtime == S_FALSE)
2193 time_ptr = gmtime (&thetime);
2194 else
2195 time_ptr = localtime (&thetime);
2196
2197 if (time_ptr != NULL)
2198 {
2199 status = strftime (AsciiTime, 80,
2200#ifdef SH_USE_XML
2201 _("%Y-%m-%dT%H:%M:%S"),
2202#else
2203 _("[%Y-%m-%dT%H:%M:%S]"),
2204#endif
2205 time_ptr);
2206
2207 if ( (status == 0) || (status == 80) )
2208 SL_RETURN( _(deftime), _("sh_unix_gmttime"));
2209 else
2210 SL_RETURN( &AsciiTime[0], _("sh_unix_gmttime"));
2211 }
2212
2213 /* last resort
2214 */
2215 SL_RETURN( _(deftime), _("sh_unix_gmttime"));
2216}
2217
2218
2219
2220char * sh_unix_getUIDdir (int level, uid_t uid)
2221{
2222 struct passwd * tempres;
2223 int status = 0;
2224
2225 SL_ENTER(_("sh_unix_getUIDdir"));
2226
2227 errno = 0;
2228 tempres = sh_getpwuid(uid);
2229 status = errno;
2230
2231 if (tempres == NULL) {
2232 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2233 sh_error_message(status),
2234 _("getpwuid"), (long) uid, _("completely missing"));
2235 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2236 }
2237
2238 if (tempres->pw_dir != NULL) {
2239 SL_RETURN( tempres->pw_dir, _("sh_unix_getUIDdir"));
2240 } else {
2241 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2242 sh_error_message(status),
2243 _("getpwuid"), (long) uid, _("pw_dir"));
2244 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2245 }
2246}
2247
2248char * sh_unix_getUIDname (int level, uid_t uid)
2249{
2250 struct passwd * tempres;
2251 int status = 0;
2252 static uid_t old_uid;
2253 static char name[32] = { '\0' };
2254
2255 SL_ENTER(_("sh_unix_getUIDname"));
2256
2257 if ((uid == old_uid) && (name[0] != '\0')) {
2258 SL_RETURN( name, _("sh_unix_getUIDname"));
2259 }
2260
2261 errno = 0;
2262 tempres = sh_getpwuid(uid);
2263 status = errno;
2264
2265 if (tempres == NULL) {
2266 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2267 sh_error_message(status),
2268 _("getpwuid"), (long) uid, _("completely missing"));
2269 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2270 }
2271
2272
2273 if (tempres->pw_name != NULL) {
2274 sl_strlcpy(name, tempres->pw_name, sizeof(name));
2275 old_uid = uid;
2276 SL_RETURN( name, _("sh_unix_getUIDname"));
2277 } else {
2278 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2279 sh_error_message(status),
2280 _("getpwuid"), (long) uid, _("pw_user"));
2281 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2282 }
2283}
2284
2285char * sh_unix_getGIDname (int level, gid_t gid)
2286{
2287 struct group * tempres;
2288 int status = 0;
2289 static gid_t old_gid;
2290 static char name[32] = { '\0' };
2291
2292 SL_ENTER(_("sh_unix_getGIDname"));
2293
2294 if ((gid == old_gid) && (name[0] != '\0')) {
2295 SL_RETURN( name, _("sh_unix_getUIDname"));
2296 }
2297
2298 errno = 0;
2299 tempres = sh_getgrgid(gid);
2300 status = errno;
2301
2302 if (tempres == NULL) {
2303 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2304 sh_error_message(status),
2305 _("getgrgid"), (long) gid, _("completely missing"));
2306
2307 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2308 }
2309
2310 if (tempres->gr_name != NULL) {
2311 sl_strlcpy(name, tempres->gr_name, sizeof(name));
2312 old_gid = gid;
2313 SL_RETURN( name, _("sh_unix_getGIDname"));
2314 } else {
2315 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2316 sh_error_message(status),
2317 _("getgrgid"), (long) gid, _("gr_name"));
2318 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2319 }
2320}
2321
2322int sh_unix_getUser ()
2323{
2324 char * p;
2325 uid_t seuid, sruid;
2326
2327 SL_ENTER(_("sh_unix_getUser"));
2328
2329 seuid = geteuid();
2330
2331 sh.effective.uid = seuid;
2332
2333 p = sh_unix_getUIDdir (SH_ERR_ERR, seuid);
2334
2335 if (p == NULL)
2336 SL_RETURN((-1), _("sh_unix_getUser"));
2337 else
2338 {
2339 if (sl_strlen(p) >= SH_PATHBUF) {
2340 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2341 _("getpwuid"), (long) seuid, _("pw_home"));
2342 SL_RETURN((-1), _("sh_unix_getUser"));
2343 } else {
2344 sl_strlcpy ( sh.effective.home, p, SH_PATHBUF);
2345 }
2346 }
2347
2348 sruid = getuid();
2349
2350 sh.real.uid = sruid;
2351
2352 p = sh_unix_getUIDname (SH_ERR_ERR, sruid);
2353 if (p == NULL)
2354 SL_RETURN((-1), _("sh_unix_getUser"));
2355 else
2356 {
2357 if (sl_strlen(p) >= USER_MAX) {
2358 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2359 _("getpwuid"), (long) sruid, _("pw_user"));
2360 SL_RETURN((-1), _("sh_unix_getUser"));
2361 } else {
2362 sl_strlcpy ( sh.real.user, p, USER_MAX);
2363 }
2364 }
2365
2366 p = sh_unix_getUIDdir (SH_ERR_ERR, sruid);
2367
2368 if (p == NULL)
2369 SL_RETURN((-1), _("sh_unix_getUser"));
2370 else
2371 {
2372 if (sl_strlen(p) >= SH_PATHBUF) {
2373 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2374 _("getpwuid"), (long) sruid, _("pw_home"));
2375 SL_RETURN((-1), _("sh_unix_getUser"));
2376 } else {
2377 sl_strlcpy ( sh.real.home, p, SH_PATHBUF);
2378 }
2379 }
2380
2381 SL_RETURN((0), _("sh_unix_getUser"));
2382
2383 /* notreached */
2384}
2385
2386
2387int sh_unix_getline (SL_TICKET fd, char * line, int sizeofline)
2388{
2389 register int count;
2390 register int n = 0;
2391 char c;
2392
2393 SL_ENTER(_("sh_unix_getline"));
2394
2395 if (sizeofline < 2) {
2396 line[0] = '\0';
2397 SL_RETURN((0), _("sh_unix_getline"));
2398 }
2399
2400 --sizeofline;
2401
2402 while (n < sizeofline) {
2403
2404 count = sl_read (fd, &c, 1);
2405
2406 /* end of file
2407 */
2408 if (count < 1) {
2409 line[n] = '\0';
2410 n = -1;
2411 break;
2412 }
2413
2414 if (/* c != '\0' && */ c != '\n') {
2415 line[n] = c;
2416 ++n;
2417 } else if (c == '\n') {
2418 if (n > 0) {
2419 line[n] = '\0';
2420 break;
2421 } else {
2422 line[n] = '\n'; /* get newline only if only char on line */
2423 ++n;
2424 line[n] = '\0';
2425 break;
2426 }
2427 } else {
2428 line[n] = '\0';
2429 break;
2430 }
2431
2432 }
2433
2434
2435 line[sizeofline] = '\0'; /* make sure line is terminated */
2436 SL_RETURN((n), _("sh_unix_getline"));
2437}
2438
2439
2440#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
2441
2442/**************************************************************
2443 *
2444 * --- FILE INFO ---
2445 *
2446 **************************************************************/
2447
2448#if (defined(__linux__) && (defined(HAVE_LINUX_EXT2_FS_H) || defined(HAVE_EXT2FS_EXT2_FS_H))) || defined(HAVE_STAT_FLAGS)
2449
2450#if defined(__linux__)
2451
2452/* --- Determine ext2fs file attributes. ---
2453 */
2454#include <sys/ioctl.h>
2455#if defined(HAVE_EXT2FS_EXT2_FS_H)
2456#include <ext2fs/ext2_fs.h>
2457#else
2458#include <linux/ext2_fs.h>
2459#endif
2460
2461/* __linux__ includes */
2462#endif
2463
2464static
2465int sh_unix_getinfo_attr (char * name,
2466 unsigned long * flags,
2467 char * c_attr,
2468 int fd, struct stat * buf)
2469{
2470
2471/* TAKEN FROM:
2472 *
2473 * lsattr.c - List file attributes on an ext2 file system
2474 *
2475 * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
2476 * Laboratoire MASI, Institut Blaise Pascal
2477 * Universite Pierre et Marie Curie (Paris VI)
2478 *
2479 * This file can be redistributed under the terms of the GNU General
2480 * Public License
2481 */
2482
2483#ifdef HAVE_STAT_FLAGS
2484
2485 SL_ENTER(_("sh_unix_getinfo_attr"));
2486
2487 *flags = 0;
2488
2489 /* cast to void to avoid compiler warning about unused parameters */
2490 (void) fd;
2491 (void) name;
2492
2493#ifdef UF_NODUMP
2494 if (buf->st_flags & UF_NODUMP) {
2495 *flags |= UF_NODUMP;
2496 c_attr[0] = 'd';
2497 }
2498#endif
2499#ifdef UF_IMMUTABLE
2500 if (buf->st_flags & UF_IMMUTABLE) {
2501 *flags |= UF_IMMUTABLE;
2502 c_attr[1] = 'i';
2503 }
2504#endif
2505#ifdef UF_APPEND
2506 if (buf->st_flags & UF_APPEND) {
2507 *flags |= UF_APPEND;
2508 c_attr[2] = 'a';
2509 }
2510#endif
2511#ifdef UF_NOUNLINK
2512 if (buf->st_flags & UF_NOUNLINK) {
2513 *flags |= UF_NOUNLINK;
2514 c_attr[3] = 'u';
2515 }
2516#endif
2517#ifdef UF_OPAQUE
2518 if (buf->st_flags & UF_OPAQUE) {
2519 *flags |= UF_OPAQUE;
2520 c_attr[4] = 'o';
2521 }
2522#endif
2523#ifdef SF_ARCHIVED
2524 if (buf->st_flags & SF_ARCHIVED) {
2525 *flags |= SF_ARCHIVED;
2526 c_attr[5] = 'R';
2527 }
2528
2529#endif
2530#ifdef SF_IMMUTABLE
2531 if (buf->st_flags & SF_IMMUTABLE) {
2532 *flags |= SF_IMMUTABLE;
2533 c_attr[6] = 'I';
2534 }
2535#endif
2536#ifdef SF_APPEND
2537 if (buf->st_flags & SF_APPEND) {
2538 *flags |= SF_APPEND;
2539 c_attr[7] = 'A';
2540 }
2541#endif
2542#ifdef SF_NOUNLINK
2543 if (buf->st_flags & SF_NOUNLINK) {
2544 *flags |= SF_NOUNLINK;
2545 c_attr[8] = 'U';
2546 }
2547#endif
2548
2549 /* ! HAVE_STAT_FLAGS */
2550#else
2551
2552#ifdef HAVE_EXT2_IOCTLS
2553 int /* fd, */ r, f;
2554
2555 SL_ENTER(_("sh_unix_getinfo_attr"));
2556
2557 *flags = 0;
2558 (void) buf;
2559
2560 /* open() -> aud_open() R.Wichmann
2561 fd = aud_open (FIL__, __LINE__, SL_YESPRIV, name, O_RDONLY|O_NONBLOCK, 0);
2562 */
2563
2564 if (fd == -1 || name == NULL)
2565 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
2566
2567
2568 r = ioctl (fd, EXT2_IOC_GETFLAGS, &f);
2569 /* close (fd); */
2570
2571 if (r == -1)
2572 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
2573
2574 if (f == 0)
2575 SL_RETURN(0, _("sh_unix_getinfo_attr"));
2576
2577 *flags = f;
2578
2579/* ! HAVE_EXT2_IOCTLS */
2580#else
2581
2582 SL_ENTER(_("sh_unix_getinfo_attr"));
2583
2584 *flags = 0; /* modified by R.Wichmann */
2585
2586/* ! HAVE_EXT2_IOCTLS */
2587#endif
2588/*
2589 * END
2590 *
2591 * lsattr.c - List file attributes on an ext2 file system
2592 */
2593
2594 if (*flags == 0)
2595 goto theend;
2596
2597#ifdef EXT2_SECRM_FL
2598 if ( (*flags & EXT2_SECRM_FL) != 0 ) c_attr[0] = 's';
2599#endif
2600#ifdef EXT2_UNRM_FL
2601 if ( (*flags & EXT2_UNRM_FL) != 0 ) c_attr[1] = 'u';
2602#endif
2603#ifdef EXT2_SYNC_FL
2604 if ( (*flags & EXT2_SYNC_FL) != 0 ) c_attr[2] = 'S';
2605#endif
2606#ifdef EXT2_IMMUTABLE_FL
2607 if ( (*flags & EXT2_IMMUTABLE_FL) != 0) c_attr[3] = 'i';
2608#endif
2609#ifdef EXT2_APPEND_FL
2610 if ( (*flags & EXT2_APPEND_FL) != 0 ) c_attr[4] = 'a';
2611#endif
2612#ifdef EXT2_NODUMP_FL
2613 if ( (*flags & EXT2_NODUMP_FL) != 0 ) c_attr[5] = 'd';
2614#endif
2615#ifdef EXT2_NOATIME_FL
2616 if ( (*flags & EXT2_NOATIME_FL) != 0) c_attr[6] = 'A';
2617#endif
2618#ifdef EXT2_COMPR_FL
2619 if ( (*flags & EXT2_COMPR_FL) != 0 ) c_attr[7] = 'c';
2620#endif
2621
2622#ifdef EXT2_TOPDIR_FL
2623 if ( (*flags & EXT2_TOPDIR_FL) != 0 ) c_attr[8] = 'T';
2624#endif
2625#ifdef EXT2_DIRSYNC_FL
2626 if ( (*flags & EXT2_DIRSYNC_FL) != 0 ) c_attr[9] = 'D';
2627#endif
2628#ifdef EXT2_NOTAIL_FL
2629 if ( (*flags & EXT2_NOTAIL_FL) != 0 ) c_attr[10] = 't';
2630#endif
2631#ifdef EXT2_JOURNAL_DATA_FL
2632 if ( (*flags & EXT2_JOURNAL_DATA_FL) != 0) c_attr[11] = 'j';
2633#endif
2634
2635 theend:
2636 /* ext2 */
2637#endif
2638
2639 c_attr[12] = '\0';
2640
2641 SL_RETURN(0, _("sh_unix_getinfo_attr"));
2642}
2643#else
2644static
2645int sh_unix_getinfo_attr (char * name,
2646 unsigned long * flags,
2647 char * c_attr,
2648 int fd, struct stat * buf)
2649{
2650 return 0;
2651}
2652
2653/* defined(__linux__) || defined(HAVE_STAT_FLAGS) */
2654#endif
2655
2656/* determine file type
2657 */
2658static
2659int sh_unix_getinfo_type (struct stat * buf,
2660 ShFileType * type,
2661 char * c_mode)
2662{
2663 SL_ENTER(_("sh_unix_getinfo_type"));
2664
2665 if ( S_ISREG(buf->st_mode) ) {
2666 (*type) = SH_FILE_REGULAR;
2667 c_mode[0] = '-';
2668 }
2669 else if ( S_ISLNK(buf->st_mode) ) {
2670 (*type) = SH_FILE_SYMLINK;
2671 c_mode[0] = 'l';
2672 }
2673 else if ( S_ISDIR(buf->st_mode) ) {
2674 (*type) = SH_FILE_DIRECTORY;
2675 c_mode[0] = 'd';
2676 }
2677 else if ( S_ISCHR(buf->st_mode) ) {
2678 (*type) = SH_FILE_CDEV;
2679 c_mode[0] = 'c';
2680 }
2681 else if ( S_ISBLK(buf->st_mode) ) {
2682 (*type) = SH_FILE_BDEV;
2683 c_mode[0] = 'b';
2684 }
2685 else if ( S_ISFIFO(buf->st_mode) ) {
2686 (*type) = SH_FILE_FIFO;
2687 c_mode[0] = '|';
2688 }
2689 else if ( S_ISSOCK(buf->st_mode) ) {
2690 (*type) = SH_FILE_SOCKET;
2691 c_mode[0] = 's';
2692 }
2693 else if ( S_ISDOOR(buf->st_mode) ) {
2694 (*type) = SH_FILE_DOOR;
2695 c_mode[0] = 'D';
2696 }
2697 else if ( S_ISPORT(buf->st_mode) ) {
2698 (*type) = SH_FILE_PORT;
2699 c_mode[0] = 'P';
2700 }
2701 else {
2702 (*type) = SH_FILE_UNKNOWN;
2703 c_mode[0] = '?';
2704 }
2705
2706 SL_RETURN(0, _("sh_unix_getinfo_type"));
2707}
2708
2709int sh_unix_get_ftype(char * fullpath)
2710{
2711 char c_mode[16];
2712 struct stat buf;
2713 ShFileType type;
2714 int res;
2715
2716 SL_ENTER(_("sh_unix_get_ftype"));
2717
2718 res = retry_lstat(FIL__, __LINE__, fullpath, &buf);
2719
2720 if (res < 0)
2721 SL_RETURN(SH_FILE_UNKNOWN, _("sh_unix_getinfo_type"));
2722
2723 sh_unix_getinfo_type (&buf, &type, c_mode);
2724
2725 SL_RETURN(type, _("sh_unix_get_ftype"));
2726}
2727
2728
2729static
2730int sh_unix_getinfo_mode (struct stat *buf,
2731 unsigned int * mode,
2732 char * c_mode)
2733{
2734
2735 SL_ENTER(_("sh_unix_getinfo_mode"));
2736
2737 (*mode) = buf->st_mode;
2738
2739 /* make 'ls'-like string */
2740
2741 if ( (buf->st_mode & S_IRUSR) != 0 ) c_mode[1] = 'r';
2742 if ( (buf->st_mode & S_IWUSR) != 0 ) c_mode[2] = 'w';
2743 if ( (buf->st_mode & S_IXUSR) != 0 ) {
2744 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 's';
2745 else c_mode[3] = 'x';
2746 } else {
2747 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 'S';
2748 }
2749
2750 if ( (buf->st_mode & S_IRGRP) != 0 ) c_mode[4] = 'r';
2751 if ( (buf->st_mode & S_IWGRP) != 0 ) c_mode[5] = 'w';
2752 if ( (buf->st_mode & S_IXGRP) != 0 ) {
2753 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 's';
2754 else c_mode[6] = 'x';
2755 } else {
2756 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 'S';
2757 }
2758
2759 if ( (buf->st_mode & S_IROTH) != 0 ) c_mode[7] = 'r';
2760 if ( (buf->st_mode & S_IWOTH) != 0 ) c_mode[8] = 'w';
2761#ifdef S_ISVTX /* not POSIX */
2762 if ( (buf->st_mode & S_IXOTH) != 0 ) {
2763 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 't';
2764 else c_mode[9] = 'x';
2765 } else {
2766 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 'T';
2767 }
2768#else
2769 if ( (buf->st_mode & S_IXOTH) != 0 ) c_mode[9] = 'x';
2770#endif
2771
2772 SL_RETURN(0, _("sh_unix_getinfo_mode"));
2773}
2774
2775
2776long IO_Limit = 0;
2777
2778void sh_unix_io_pause ()
2779{
2780 long runtime;
2781 float someval;
2782 unsigned long sometime;
2783
2784 if (IO_Limit == 0)
2785 {
2786 return;
2787 }
2788 else
2789 {
2790 runtime = (long) (time(NULL) - sh.statistics.time_start);
2791
2792 if (runtime > 0 && (long)(sh.statistics.bytes_hashed/runtime) > IO_Limit)
2793 {
2794 someval = sh.statistics.bytes_hashed - (IO_Limit * runtime);
2795 someval /= (float) IO_Limit;
2796 if (someval < 1.0)
2797 {
2798 someval *= 1000; /* milliseconds in a second */
2799 sometime = (unsigned long) someval;
2800 /* fprintf(stderr, "FIXME PAUSE %ld\n", sometime); */
2801 retry_msleep(0, sometime);
2802 }
2803 else
2804 {
2805 sometime = (unsigned long) someval;
2806 /* fprintf(stderr, "FIXME PAUSE %ld sec\n", sometime); */
2807 retry_msleep (sometime, 0);
2808 }
2809 }
2810 }
2811 return;
2812}
2813
2814int sh_unix_set_io_limit (const char * c)
2815{
2816 long val;
2817
2818 SL_ENTER(_("sh_unix_set_io_limit"));
2819
2820 val = strtol (c, (char **)NULL, 10);
2821 if (val < 0)
2822 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
2823 _("set I/O limit"), c);
2824
2825 val = (val < 0 ? 0 : val);
2826
2827 IO_Limit = val * 1024;
2828 SL_RETURN( 0, _("sh_unix_set_io_limit"));
2829}
2830
2831/* obtain file info
2832 */
2833extern int flag_err_debug;
2834
2835#include "sh_ignore.h"
2836
2837int sh_unix_checksum_size (char * filename, struct stat * fbuf,
2838 char * fileHash, int alert_timeout)
2839{
2840 file_type tmpFile;
2841 int status;
2842
2843 SL_ENTER(_("sh_unix_checksum_size"));
2844
2845 if (sh.flag.checkSum != SH_CHECK_INIT)
2846 {
2847 /* lookup file in database */
2848 status = sh_hash_get_it (filename, &tmpFile);
2849 if (status != 0) {
2850 goto out;
2851 }
2852 }
2853 else
2854 {
2855 tmpFile.size = fbuf->st_size;
2856 }
2857
2858 /* if last < current get checksum */
2859 if (tmpFile.size < fbuf->st_size)
2860 {
2861 sl_strlcpy(fileHash,
2862 sh_tiger_generic_hash (filename, TIGER_FD, tmpFile.size,
2863 alert_timeout),
2864 KEY_LEN+1);
2865
2866 /* return */
2867 SL_RETURN( 0, _("sh_unix_checksum_size"));
2868 }
2869
2870 out:
2871 sl_strlcpy(fileHash,
2872 _("000000000000000000000000000000000000000000000000"),
2873 KEY_LEN+1);
2874 SL_RETURN( -1, _("sh_unix_checksum_size"));
2875}
2876
2877int sh_unix_check_selinux = S_FALSE;
2878int sh_unix_check_acl = S_FALSE;
2879
2880#ifdef USE_ACL
2881
2882#include <sys/acl.h>
2883static char * sh_unix_getinfo_acl (char * path, int fd, struct stat * buf)
2884{
2885 /* system.posix_acl_access, system.posix_acl_default
2886 */
2887 char * out = NULL;
2888 char * collect = NULL;
2889 char * tmp;
2890 char * out_compact;
2891 ssize_t len;
2892 acl_t result;
2893
2894 SL_ENTER(_("sh_unix_getinfo_acl"));
2895
2896 result = (fd == -1) ?
2897 acl_get_file (path, ACL_TYPE_ACCESS) :
2898 acl_get_fd (fd);
2899
2900 if (result)
2901 {
2902 out = acl_to_text (result, &len);
2903 if (out && (len > 0)) {
2904 out_compact = sh_util_acl_compact (out, len);
2905 acl_free(out);
2906 if (out_compact)
2907 {
2908 collect = sh_util_strconcat (_("acl_access:"), out_compact, NULL);
2909 SH_FREE(out_compact);
2910 }
2911 }
2912 acl_free(result);
2913 }
2914
2915
2916 if ( S_ISDIR(buf->st_mode) )
2917 {
2918 result = acl_get_file (path, ACL_TYPE_DEFAULT);
2919
2920 if (result)
2921 {
2922 out = acl_to_text (result, &len);
2923 if (out && (len > 0)) {
2924 out_compact = sh_util_acl_compact (out, len);
2925 acl_free(out);
2926 if (out_compact) {
2927 if (collect) {
2928 tmp = sh_util_strconcat (_("acl_default:"),
2929 out_compact, ":", collect, NULL);
2930 SH_FREE(collect);
2931 }
2932 else {
2933 tmp = sh_util_strconcat (_("acl_default:"), out_compact, NULL);
2934 }
2935 SH_FREE(out_compact);
2936 collect = tmp;
2937 }
2938 }
2939 acl_free(result);
2940 }
2941 }
2942
2943 SL_RETURN((collect),_("sh_unix_getinfo_acl"));
2944}
2945#endif
2946
2947#ifdef USE_XATTR
2948
2949#include <attr/xattr.h>
2950static char * sh_unix_getinfo_xattr_int (char * path, int fd, char * name)
2951{
2952 char * out = NULL;
2953 char * tmp = NULL;
2954 size_t size = 256;
2955 ssize_t result;
2956
2957 SL_ENTER(_("sh_unix_getinfo_xattr_int"));
2958
2959 out = SH_ALLOC(size);
2960
2961 result = (fd == -1) ?
2962 lgetxattr (path, name, out, size-1) :
2963 fgetxattr (fd, name, out, size-1);
2964
2965 if (result == -1 && errno == ERANGE)
2966 {
2967 SH_FREE(out);
2968 result = (fd == -1) ?
2969 lgetxattr (path, name, NULL, 0) :
2970 fgetxattr (fd, name, NULL, 0);
2971 size = result + 1;
2972 out = SH_ALLOC(size);
2973 result = (fd == -1) ?
2974 lgetxattr (path, name, out, size-1) :
2975 fgetxattr (fd, name, out, size-1);
2976 }
2977
2978 if ((result > 0) && ((size_t)result < size))
2979 {
2980 out[size-1] = '\0';
2981 tmp = out;
2982 }
2983 else
2984 {
2985 SH_FREE(out);
2986 }
2987
2988 SL_RETURN((tmp),_("sh_unix_getinfo_xattr_int"));
2989}
2990
2991
2992static char * sh_unix_getinfo_xattr (char * path, int fd, struct stat * buf)
2993{
2994 /* system.posix_acl_access, system.posix_acl_default, security.selinux
2995 */
2996 char * tmp;
2997 char * out = NULL;
2998 char * collect = NULL;
2999
3000 SL_ENTER(_("sh_unix_getinfo_xattr"));
3001
3002#ifdef USE_ACL
3003 /*
3004 * we need the acl_get_fd/acl_get_file functions, getxattr will only
3005 * yield the raw bytes
3006 */
3007 if (sh_unix_check_acl == S_TRUE)
3008 {
3009 out = sh_unix_getinfo_acl(path, fd, buf);
3010
3011 if (out)
3012 {
3013 collect = out;
3014 }
3015 }
3016#endif
3017
3018 out = sh_unix_getinfo_xattr_int(path, fd, _("security.selinux"));
3019
3020 if (out)
3021 {
3022 if (collect) {
3023 tmp = sh_util_strconcat(_("selinux:"), out, ":", collect, NULL);
3024 SH_FREE(collect);
3025 }
3026 else {
3027 tmp = sh_util_strconcat(_("selinux:"), out, NULL);
3028 }
3029 SH_FREE(out);
3030 collect = tmp;
3031 }
3032
3033 SL_RETURN((collect),_("sh_unix_getinfo_xattr"));
3034}
3035#endif
3036
3037#ifdef USE_XATTR
3038int sh_unix_setcheckselinux (const char * c)
3039{
3040 int i;
3041 SL_ENTER(_("sh_unix_setcheckselinux"));
3042 i = sh_util_flagval(c, &(sh_unix_check_selinux));
3043
3044 SL_RETURN(i, _("sh_unix_setcheckselinux"));
3045}
3046#endif
3047
3048#ifdef USE_ACL
3049int sh_unix_setcheckacl (const char * c)
3050{
3051 int i;
3052 SL_ENTER(_("sh_unix_setcheckacl"));
3053 i = sh_util_flagval(c, &(sh_unix_check_acl));
3054
3055 SL_RETURN(i, _("sh_unix_setcheckacl"));
3056}
3057#endif
3058
3059
3060int sh_unix_getinfo (int level, char * filename, file_type * theFile,
3061 char * fileHash, int policy)
3062{
3063 char timestr[81];
3064 long runtim;
3065 struct stat buf;
3066 struct stat lbuf;
3067 struct stat fbuf;
3068 int stat_return;
3069
3070 ShFileType type;
3071 unsigned int mode;
3072 char * name;
3073 char * tmp;
3074 char * tmp2;
3075
3076 char * linknamebuf;
3077 int linksize;
3078
3079 extern int get_the_fd (SL_TICKET ticket);
3080
3081 SL_TICKET rval_open;
3082 int fd;
3083 int fstat_return;
3084
3085 time_t tend;
3086 time_t tstart;
3087
3088
3089 char * path = NULL;
3090
3091 int alert_timeout = 120;
3092
3093 path = theFile->fullpath;
3094
3095 SL_ENTER(_("sh_unix_getinfo"));
3096
3097 /* --- Stat the file, and get checksum. ---
3098 */
3099 tstart = time(NULL);
3100
3101 stat_return = retry_lstat (FIL__, __LINE__,
3102 path /* theFile->fullpath */, &buf);
3103
3104 fd = -1;
3105 fstat_return = -1;
3106 rval_open = -1;
3107
3108 if (stat_return == 0 && S_ISREG(buf.st_mode))
3109 {
3110 rval_open = sl_open_fastread (path /* theFile->fullpath */, SL_YESPRIV);
3111
3112 alert_timeout = 120; /* this is per 8K block now ! */
3113
3114 if (path[1] == 'p' && path[5] == '/' && path[2] == 'r' &&
3115 path[3] == 'o' && path[4] == 'c' && path[0] == '/')
3116 {
3117 /* seven is magic */
3118 alert_timeout = 7;
3119 }
3120
3121 fd = get_the_fd(rval_open);
3122 }
3123
3124 tend = time(NULL);
3125
3126 /* An unprivileged user may slow lstat/open to a crawl
3127 * with clever path/symlink setup
3128 */
3129 if ((tend - tstart) > (time_t) /* 60 */ 6)
3130 {
3131 tmp2 = sh_util_safe_name (theFile->fullpath);
3132 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_TOOLATE,
3133 (long)(tend - tstart), tmp2);
3134 SH_FREE(tmp2);
3135 }
3136
3137 if (fd >= 0)
3138 fstat_return = retry_fstat (FIL__, __LINE__, fd, &fbuf);
3139 else
3140 fd = -1;
3141
3142
3143 /* --- case 1: lstat failed ---
3144 */
3145 if (stat_return != 0)
3146 {
3147 stat_return = errno;
3148 if (!SL_ISERROR(rval_open))
3149 sl_close(rval_open);
3150 if (sh.flag.checkSum == SH_CHECK_INIT ||
3151 (sh_hash_have_it (theFile->fullpath) >= 0 &&
3152 theFile->reported == S_FALSE))
3153 {
3154 if (S_FALSE == sh_ignore_chk_del(theFile->fullpath)) {
3155 tmp2 = sh_util_safe_name (theFile->fullpath);
3156 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_LSTAT,
3157 sh_error_message (stat_return), tmp2);
3158 SH_FREE(tmp2);
3159 }
3160 }
3161 SL_RETURN((-1),_("sh_unix_getinfo"));
3162 }
3163
3164 /* --- case 2: not a regular file ---
3165 */
3166 else if (! S_ISREG(buf.st_mode))
3167 {
3168 if (fileHash != NULL)
3169 sl_strlcpy(fileHash,
3170 _("000000000000000000000000000000000000000000000000"),
3171 KEY_LEN+1);
3172 }
3173
3174 /* --- case 3a: a regular file, fstat ok ---
3175 */
3176 else if (fstat_return == 0 &&
3177 buf.st_mode == fbuf.st_mode &&
3178 buf.st_ino == fbuf.st_ino &&
3179 buf.st_uid == fbuf.st_uid &&
3180 buf.st_gid == fbuf.st_gid &&
3181 buf.st_dev == fbuf.st_dev )
3182 {
3183 if (fileHash != NULL)
3184 {
3185 if ((theFile->check_mask & MODI_CHK) == 0)
3186 {
3187 sl_strlcpy(fileHash,
3188 _("000000000000000000000000000000000000000000000000"),
3189 KEY_LEN+1);
3190 }
3191 else if ((theFile->check_mask & MODI_PREL) != 0 &&
3192 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
3193 alert_timeout))
3194 {
3195 if (0 != sh_prelink_run (theFile->fullpath,
3196 fileHash, alert_timeout))
3197 sl_strlcpy(fileHash,
3198 _("000000000000000000000000000000000000000000000000"),
3199 KEY_LEN+1);
3200 }
3201 else
3202 {
3203 tiger_fd = rval_open;
3204 sl_strlcpy(fileHash,
3205 sh_tiger_generic_hash (theFile->fullpath,
3206 TIGER_FD, 0,
3207 alert_timeout),
3208 KEY_LEN+1);
3209 if ((theFile->check_mask & MODI_SGROW) != 0)
3210 {
3211 sl_rewind(rval_open);
3212 tiger_fd = rval_open;
3213 sh_unix_checksum_size (theFile->fullpath, &fbuf,
3214 &fileHash[KEY_LEN + 1],
3215 alert_timeout);
3216 }
3217 }
3218 }
3219 }
3220
3221 /* --- case 3b: a regular file, fstat ok, but different ---
3222 */
3223 else if (fstat_return == 0 && S_ISREG(fbuf.st_mode))
3224 {
3225 memcpy (&buf, &fbuf, sizeof( struct stat ));
3226
3227 if (fileHash != NULL)
3228 {
3229 if ((theFile->check_mask & MODI_CHK) == 0)
3230 {
3231 sl_strlcpy(fileHash,
3232 _("000000000000000000000000000000000000000000000000"),
3233 KEY_LEN+1);
3234 }
3235 else if (policy == SH_LEVEL_PRELINK &&
3236 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
3237 alert_timeout))
3238 {
3239 if (0 != sh_prelink_run (theFile->fullpath,
3240 fileHash, alert_timeout))
3241 sl_strlcpy(fileHash,
3242 _("000000000000000000000000000000000000000000000000"),
3243 KEY_LEN+1);
3244 }
3245 else
3246 {
3247 tiger_fd = rval_open;
3248 sl_strlcpy(fileHash,
3249 sh_tiger_generic_hash (theFile->fullpath, TIGER_FD, 0,
3250 alert_timeout),
3251 KEY_LEN + 1);
3252 if ((theFile->check_mask & MODI_SGROW) != 0)
3253 {
3254 sl_rewind(rval_open);
3255 tiger_fd = rval_open;
3256 sh_unix_checksum_size (theFile->fullpath, &fbuf,
3257 &fileHash[KEY_LEN + 1],
3258 alert_timeout);
3259 }
3260 }
3261 }
3262 }
3263
3264 /* --- case 4: a regular file, fstat failed ---
3265 */
3266
3267 else /* fstat_return != 0 or !S_ISREG(fbuf->st_mode) */
3268 {
3269 fstat_return = errno;
3270 if (fileHash != NULL)
3271 sl_strlcpy(fileHash,
3272 _("000000000000000000000000000000000000000000000000"),
3273 KEY_LEN + 1);
3274
3275 if ((theFile->check_mask & MODI_CHK) != 0)
3276 {
3277 tmp2 = sh_util_safe_name (theFile->fullpath);
3278 sh_error_handle (level, FIL__, __LINE__, fstat_return, MSG_E_READ,
3279 tmp2);
3280 SH_FREE(tmp2);
3281 }
3282 }
3283
3284
3285 /* --- Determine file type. ---
3286 */
3287 memset (theFile->c_mode, '-', 10);
3288 theFile->c_mode[10] = '\0';
3289
3290 memset (theFile->link_c_mode, '-', 10);
3291 theFile->link_c_mode[10] = '\0';
3292
3293 sh_unix_getinfo_type (&buf, &type, theFile->c_mode);
3294 theFile->type = type;
3295
3296#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
3297
3298 /* --- Determine file attributes. ---
3299 */
3300 memset (theFile->c_attributes, '-', 12);
3301 theFile->c_attributes[12] = '\0';
3302 theFile->attributes = 0;
3303
3304 if (theFile->c_mode[0] != 'c' && theFile->c_mode[0] != 'b' &&
3305 theFile->c_mode[0] != 'l' )
3306 sh_unix_getinfo_attr(theFile->fullpath,
3307 &theFile->attributes, theFile->c_attributes,
3308 fd, &buf);
3309#endif
3310
3311#if defined(USE_XATTR)
3312 if (sh_unix_check_selinux == S_TRUE)
3313 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
3314#elif defined(USE_ACL)
3315 if (sh_unix_check_acl == S_TRUE)
3316 theFile->attr_string = sh_unix_getinfo_acl (theFile->fullpath, fd, &buf);
3317#else
3318 theFile->attr_string = NULL;
3319#endif
3320
3321 if (!SL_ISERROR(rval_open))
3322 sl_close(rval_open);
3323
3324
3325 /* --- I/O limit. ---
3326 */
3327 if (IO_Limit > 0)
3328 {
3329 runtim = (long) (time(NULL) - sh.statistics.time_start);
3330
3331 if (runtim > 0 && (long)(sh.statistics.bytes_hashed/runtim) > IO_Limit)
3332 retry_msleep(1, 0);
3333 }
3334
3335 /* --- Determine permissions. ---
3336 */
3337 sh_unix_getinfo_mode (&buf, &mode, theFile->c_mode);
3338
3339 /* --- Trivia. ---
3340 */
3341 theFile->dev = buf.st_dev;
3342 theFile->ino = buf.st_ino;
3343 theFile->mode = buf.st_mode;
3344 theFile->hardlinks = buf.st_nlink;
3345 theFile->owner = buf.st_uid;
3346 theFile->group = buf.st_gid;
3347 theFile->rdev = buf.st_rdev;
3348 theFile->size = buf.st_size;
3349 theFile->blksize = (unsigned long) buf.st_blksize;
3350 theFile->blocks = (unsigned long) buf.st_blocks;
3351 theFile->atime = buf.st_atime;
3352 theFile->mtime = buf.st_mtime;
3353 theFile->ctime = buf.st_ctime;
3354
3355
3356 /* --- Owner and group. ---
3357 */
3358
3359 if ( (name = sh_unix_getGIDname(SH_ERR_ALL,
3360 buf.st_gid)) != NULL) {
3361 sl_strlcpy (theFile->c_group, name, GROUP_MAX+1);
3362 } else {
3363
3364 tmp2 = sh_util_safe_name (theFile->fullpath);
3365
3366 if (policy == SH_LEVEL_ALLIGNORE)
3367 {
3368 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
3369 MSG_FI_NOGRP,
3370 (long) buf.st_gid, tmp2);
3371 }
3372 else
3373 {
3374 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
3375 MSG_FI_NOGRP,
3376 (long) buf.st_gid, tmp2);
3377 }
3378 SH_FREE(tmp2);
3379 sl_snprintf(theFile->c_group, GROUP_MAX+1, "%d", (long) buf.st_gid);
3380 }
3381
3382
3383 if ( (name = sh_unix_getUIDname(SH_ERR_ALL,
3384 buf.st_uid)) != NULL) {
3385 sl_strlcpy (theFile->c_owner, name, USER_MAX+1);
3386 } else {
3387
3388 tmp2 = sh_util_safe_name (theFile->fullpath);
3389
3390 if (policy == SH_LEVEL_ALLIGNORE)
3391 {
3392 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
3393 MSG_FI_NOUSR,
3394 (long) buf.st_uid, tmp2);
3395 }
3396 else
3397 {
3398 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
3399 MSG_FI_NOUSR,
3400 (long) buf.st_uid, tmp2);
3401 }
3402 SH_FREE(tmp2);
3403 sl_snprintf(theFile->c_owner, USER_MAX+1, "%d", (long) buf.st_uid);
3404 }
3405
3406 /* --- Output the file. ---
3407 */
3408 if (flag_err_debug == SL_TRUE)
3409 {
3410 tmp2 = sh_util_safe_name ((filename == NULL) ?
3411 theFile->fullpath : filename);
3412 sl_strlcpy(timestr, sh_unix_time(theFile->mtime), 81);
3413 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LIST,
3414 theFile->c_mode,
3415 theFile->hardlinks,
3416 theFile->c_owner,
3417 theFile->c_group,
3418 (unsigned long) theFile->size,
3419 timestr,
3420 tmp2);
3421 SH_FREE(tmp2);
3422 }
3423
3424 /* --- Check for links. ---
3425 */
3426 if (theFile->c_mode[0] == 'l')
3427 {
3428
3429 linknamebuf = SH_ALLOC(PATH_MAX);
3430
3431 /* flawfinder: ignore */
3432 linksize = readlink (theFile->fullpath, linknamebuf, PATH_MAX-1);
3433
3434 if (linksize < (PATH_MAX-1) && linksize >= 0)
3435 linknamebuf[linksize] = '\0';
3436 else
3437 linknamebuf[PATH_MAX-1] = '\0';
3438
3439 if (linksize < 0)
3440 {
3441 linksize = errno;
3442 tmp2 = sh_util_safe_name (theFile->fullpath);
3443 sh_error_handle (level, FIL__, __LINE__, linksize, MSG_FI_RDLNK,
3444 sh_error_message (linksize), tmp2);
3445 SH_FREE(tmp2);
3446 SH_FREE(linknamebuf);
3447 theFile->linkpath[0] = '-';
3448 theFile->linkpath[1] = '\0';
3449 SL_RETURN((-1),_("sh_unix_getinfo"));
3450 }
3451
3452 if (linknamebuf[0] == '/')
3453 {
3454 sl_strlcpy (theFile->linkpath, linknamebuf, PATH_MAX);
3455 }
3456 else
3457 {
3458 tmp = sh_util_dirname(theFile->fullpath);
3459 sl_strlcpy (theFile->linkpath,
3460 tmp,
3461 PATH_MAX);
3462 SH_FREE(tmp);
3463 sl_strlcat (theFile->linkpath,
3464 "/", PATH_MAX);
3465 sl_strlcat (theFile->linkpath,
3466 linknamebuf,
3467 PATH_MAX);
3468 }
3469
3470 /* stat the link
3471 */
3472 stat_return = retry_lstat (FIL__, __LINE__, theFile->linkpath, &lbuf);
3473
3474 /* check for error
3475 */
3476 if (stat_return != 0)
3477 {
3478 stat_return = errno;
3479 tmp = sh_util_safe_name (theFile->fullpath);
3480 tmp2 = sh_util_safe_name (theFile->linkpath);
3481 if (stat_return != ENOENT)
3482 {
3483 sh_error_handle (level, FIL__, __LINE__, stat_return,
3484 MSG_FI_LSTAT,
3485 sh_error_message (stat_return), tmp2);
3486 }
3487 else
3488 {
3489 /* a dangling link -- everybody seems to have plenty of them
3490 */
3491 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_DLNK,
3492 tmp, tmp2);
3493 }
3494 theFile->linkisok = BAD;
3495 SH_FREE(tmp);
3496 SH_FREE(tmp2);
3497 SH_FREE(linknamebuf);
3498 /*
3499 * changed Tue Feb 10 16:16:13 CET 2004:
3500 * add dangling symlinks into database
3501 * SL_RETURN((-1),_("sh_unix_getinfo"));
3502 */
3503 theFile->linkmode = 0;
3504 SL_RETURN((0),_("sh_unix_getinfo"));
3505 }
3506
3507 theFile->linkisok = GOOD;
3508
3509
3510 /* --- Determine file type. ---
3511 */
3512 sh_unix_getinfo_type (&lbuf, &type, theFile->link_c_mode);
3513 theFile->type = type;
3514
3515 /* --- Determine permissions. ---
3516 */
3517 sh_unix_getinfo_mode (&lbuf, &mode, theFile->link_c_mode);
3518 theFile->linkmode = lbuf.st_mode;
3519
3520 /* --- Output the link. ---
3521 */
3522 if (theFile->linkisok == GOOD)
3523 {
3524 tmp2 = sh_util_safe_name (linknamebuf);
3525 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LLNK,
3526 theFile->link_c_mode, tmp2);
3527 SH_FREE(tmp2);
3528 }
3529 SH_FREE(linknamebuf);
3530 }
3531 SL_RETURN((0),_("sh_unix_getinfo"));
3532}
3533
3534/* #if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE) */
3535#endif
3536
3537int sh_unix_unlock (char * lockfile, char * flag);
3538int sh_unix_lock (char * lockfile, char * flag);
3539
3540/* check whether file is locked
3541 */
3542int sh_unix_test_and_lock (char * filename, char * lockfile)
3543{
3544 static struct stat buf;
3545 int status = 0;
3546
3547
3548 SL_TICKET fd;
3549 char line_in[128];
3550
3551 SL_ENTER(_("sh_unix_test_and_lock"));
3552
3553 if (filename != NULL)
3554 {
3555 status = retry_lstat (FIL__, __LINE__, filename, &buf);
3556
3557 /* no logfile to lock
3558 */
3559 if (status < 0)
3560 SL_RETURN((-1),_("sh_unix_test_and_lock"));
3561 }
3562
3563 status = retry_lstat (FIL__, __LINE__, lockfile, &buf);
3564
3565 /* --- No lock file found, try to lock. ---
3566 */
3567
3568 if (status < 0 && errno == ENOENT)
3569 {
3570 if (0 == sh_unix_lock (lockfile, filename))
3571 {
3572 if (filename != NULL)
3573 sh.flag.islocked = GOOD;
3574 SL_RETURN((0),_("sh_unix_test_and_lock"));
3575 }
3576 }
3577 else if (status == 0 && buf.st_size == 0)
3578 {
3579 if (filename != NULL)
3580 sh.flag.islocked = GOOD;
3581 sh_unix_unlock (lockfile, filename);
3582 if (filename != NULL)
3583 sh.flag.islocked = BAD;
3584 if (0 == sh_unix_lock (lockfile, filename))
3585 {
3586 if (filename != NULL)
3587 sh.flag.islocked = GOOD;
3588 SL_RETURN((0),_("sh_unix_test_and_lock"));
3589 }
3590 else
3591 {
3592 sh_error_handle ((-1), FIL__, __LINE__, status,
3593 MSG_E_SUBGEN,
3594 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
3595 _("sh_unix_test_and_lock"));
3596 SL_RETURN((-1),_("sh_unix_test_and_lock"));
3597 }
3598 }
3599
3600 /* --- Check on lock. ---
3601 */
3602
3603 if (status >= 0)
3604 {
3605 fd = sl_open_read (lockfile, SL_YESPRIV);
3606 if (SL_ISERROR(fd))
3607 sh_error_handle ((-1), FIL__, __LINE__, fd,
3608 MSG_E_SUBGEN,
3609 (filename == NULL) ? _("Cannot open PID file for read") : _("Cannot open lock file for read"),
3610 _("sh_unix_test_and_lock"));
3611 }
3612 else
3613 fd = -1;
3614
3615 if (!SL_ISERROR(fd))
3616 {
3617 /* read the PID in the lock file
3618 */
3619 status = sh_unix_getline (fd, line_in, sizeof(line_in));
3620
3621 /* convert to numeric
3622 */
3623 if (status > 0)
3624 {
3625 errno = 0;
3626 status = strtol(line_in, (char **)NULL, 10);
3627 if (errno == ERANGE || status <= 0)
3628 {
3629 sh_error_handle ((-1), FIL__, __LINE__, status,
3630 MSG_E_SUBGEN,
3631 (filename == NULL) ? _("Bad PID in PID file") : _("Bad PID in lock file"),
3632 _("sh_unix_test_and_lock"));
3633
3634 status = -1;
3635 }
3636 }
3637 else
3638 {
3639 sh_error_handle ((-1), FIL__, __LINE__, status,
3640 MSG_E_SUBGEN,
3641 (filename == NULL) ? _("Cannot read PID file") : _("Cannot read lock file"),
3642 _("sh_unix_test_and_lock"));
3643 }
3644 sl_close(fd);
3645
3646 if (status == (int) getpid())
3647 {
3648 if (filename != NULL)
3649 sh.flag.islocked = GOOD;
3650 SL_RETURN((0),_("sh_unix_test_and_lock"));
3651 }
3652
3653
3654 /* --- Check whether the process exists. ---
3655 */
3656 if (status > 0)
3657 {
3658 errno = 0;
3659 status = aud_kill (FIL__, __LINE__, status, 0);
3660
3661 /* Does not exist, so remove the stale lock
3662 * and create a new one.
3663 */
3664 if (status < 0 && errno == ESRCH)
3665 {
3666 if (filename != NULL)
3667 sh.flag.islocked = GOOD;
3668 if (0 != sh_unix_unlock(lockfile, filename) && (filename !=NULL))
3669 sh.flag.islocked = BAD;
3670 else
3671 {
3672 if (0 == sh_unix_lock (lockfile, filename))
3673 {
3674 if (filename != NULL)
3675 sh.flag.islocked = GOOD;
3676 SL_RETURN((0),_("sh_unix_test_and_lock"));
3677 }
3678 else
3679 {
3680 sh_error_handle ((-1), FIL__, __LINE__, status,
3681 MSG_E_SUBGEN,
3682 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
3683 _("sh_unix_test_and_lock"));
3684 }
3685 if (filename != NULL)
3686 sh.flag.islocked = BAD;
3687 }
3688 }
3689 else
3690 {
3691 sh_error_handle ((-1), FIL__, __LINE__, status,
3692 MSG_E_SUBGEN,
3693 (filename == NULL) ? _("Cannot remove stale PID file, PID may be a running process") : _("Cannot remove stale lock file, PID may be a running process"),
3694 _("sh_unix_test_and_lock"));
3695 if (filename != NULL)
3696 sh.flag.islocked = BAD;
3697 }
3698 }
3699 }
3700 SL_RETURN((-1),_("sh_unix_testlock"));
3701}
3702
3703/* write the PID file
3704 */
3705int sh_unix_write_pid_file()
3706{
3707 return sh_unix_test_and_lock(NULL, sh.srvlog.alt);
3708}
3709
3710/* write lock for filename
3711 */
3712int sh_unix_write_lock_file(char * filename)
3713{
3714 size_t len;
3715 int res;
3716 char * lockfile;
3717
3718 if (filename == NULL)
3719 return (-1);
3720
3721 len = sl_strlen(filename);
3722 if (sl_ok_adds(len, 6))
3723 len += 6;
3724 lockfile = SH_ALLOC(len);
3725 sl_strlcpy(lockfile, filename, len);
3726 sl_strlcat(lockfile, _(".lock"), len);
3727 res = sh_unix_test_and_lock(filename, lockfile);
3728 SH_FREE(lockfile);
3729 return res;
3730}
3731
3732int sh_unix_unlock(char * lockfile, char * flag)
3733{
3734 int error = 0;
3735
3736 SL_ENTER(_("sh_unix_unlock"));
3737
3738 /* --- Logfile is not locked to us. ---
3739 */
3740 if (sh.flag.islocked == BAD && flag != NULL)
3741 SL_RETURN((-1),_("sh_unix_unlock"));
3742
3743 /* --- Check whether the directory is secure. ---
3744 */
3745 if (0 != tf_trust_check (lockfile, SL_YESPRIV))
3746 SL_RETURN((-1),_("sh_unix_unlock"));
3747
3748 /* --- Delete the lock file. ---
3749 */
3750 error = retry_aud_unlink (FIL__, __LINE__, lockfile);
3751
3752 if (error == 0)
3753 {
3754 if (flag != NULL)
3755 sh.flag.islocked = BAD; /* not locked anymore */
3756 }
3757 else if (flag != NULL)
3758 {
3759 error = errno;
3760 sh_error_handle ((-1), FIL__, __LINE__, error, MSG_E_UNLNK,
3761 sh_error_message(error), lockfile);
3762 SL_RETURN((-1),_("sh_unix_unlock"));
3763 }
3764 SL_RETURN((0),_("sh_unix_unlock"));
3765}
3766
3767/* rm lock for filename
3768 */
3769int sh_unix_rm_lock_file(char * filename)
3770{
3771 size_t len;
3772 int res;
3773 char * lockfile;
3774
3775 if (filename == NULL)
3776 return (-1);
3777
3778 len = sl_strlen(filename);
3779 if (sl_ok_adds(len, 6))
3780 len += 6;
3781 lockfile = SH_ALLOC(len);
3782 sl_strlcpy(lockfile, filename, len);
3783 sl_strlcat(lockfile, _(".lock"), len);
3784
3785 res = sh_unix_unlock(lockfile, filename);
3786 SH_FREE(lockfile);
3787 return res;
3788}
3789
3790/* rm lock for filename
3791 */
3792int sh_unix_rm_pid_file()
3793{
3794 return sh_unix_unlock(sh.srvlog.alt, NULL);
3795}
3796
3797int sh_unix_lock (char * lockfile, char * flag)
3798{
3799 struct stat buf;
3800 int status;
3801 int filed;
3802 int errnum;
3803 char myPid[64];
3804 SL_TICKET fd;
3805 extern int get_the_fd (SL_TICKET ticket);
3806
3807
3808 status = retry_lstat (FIL__, __LINE__, lockfile, &buf);
3809
3810 SL_ENTER(_("sh_unix_lock"));
3811
3812 if (0 == status)
3813 {
3814 if (flag != NULL)
3815 sh.flag.islocked = BAD;
3816 SL_RETURN((-1),_("sh_unix_lock"));
3817 }
3818
3819 sprintf (myPid, "%ld\n", (long) getpid()); /* known to fit */
3820
3821 fd = sl_open_write (lockfile, SL_YESPRIV);
3822
3823 if (!SL_ISERROR(fd))
3824 {
3825 errnum = sl_write (fd, myPid, sl_strlen(myPid));
3826 filed = get_the_fd(fd);
3827 fchmod (filed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
3828 sl_close (fd);
3829
3830 if (!SL_ISERROR(errnum))
3831 {
3832 if (flag != NULL)
3833 sh.flag.islocked = GOOD;
3834 SL_RETURN((0),_("sh_unix_lock"));
3835 }
3836 }
3837
3838 TPT((0, FIL__, __LINE__, _("msg=<open pid file failed>\n")));
3839 if (flag != NULL)
3840 sh.flag.islocked = BAD;
3841 SL_RETURN((-1),_("sh_unix_lock"));
3842
3843 /* notreached */
3844}
3845
3846/* Test whether file exists
3847 */
3848int sh_unix_file_stat(char * path)
3849{
3850 struct stat buf;
3851
3852 SL_ENTER(_("sh_unix_file_stat"));
3853
3854 if (-1 == retry_stat(FIL__, __LINE__, path, &buf))
3855 SL_RETURN( (0), _("sh_unix_file_stat"));
3856 else
3857 SL_RETURN( (-1), _("sh_unix_file_stat"));
3858}
3859
3860
3861/* Test whether file exists, is a character device, allows read
3862 * access, and is not world writeable.
3863 */
3864int sh_unix_file_exists(int fd)
3865{
3866 struct stat buf;
3867
3868 SL_ENTER(_("sh_unix_file_exists"));
3869
3870 if (retry_fstat(FIL__, __LINE__, fd, &buf) == -1)
3871 SL_RETURN( (-1), _("sh_unix_file_exists"));
3872 else if ( S_ISCHR(buf.st_mode) && 0 != (S_IROTH & buf.st_mode)
3873 /*
3874 * #if !defined(__CYGWIN32__) && !defined(__CYGWIN__)
3875 * && 0 == (S_IWOTH & buf.st_mode)
3876 * #endif
3877 */
3878 )
3879 SL_RETURN( (0), _("sh_unix_file_exists"));
3880 else
3881 SL_RETURN( (-1), _("sh_unix_file_exists"));
3882}
3883
3884static char preq[16];
3885
3886/* return true if database is remote
3887 */
3888int file_is_remote ()
3889{
3890 static int init = 0;
3891 struct stat buf;
3892
3893 SL_ENTER(_("file_is_remote"));
3894
3895 if (init == 0)
3896 {
3897 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
3898 ++init;
3899 }
3900 if (0 == sl_strncmp (sh.data.path, preq, 15))
3901 {
3902 if (sh.data.path[15] != '\0') /* should be start of path */
3903 {
3904 if (0 == stat(&(sh.data.path[15]), &buf))
3905 {
3906 SL_RETURN( S_FALSE, _("file_is_remote"));
3907 }
3908 }
3909 SL_RETURN( S_TRUE, _("file_is_remote"));
3910 }
3911 SL_RETURN( S_FALSE, _("file_is_remote"));
3912}
3913
3914/* Return the path to the configuration/database file.
3915 */
3916char * file_path(char what, char flag)
3917{
3918 static int init = 0;
3919
3920 SL_ENTER(_("file_path"));
3921
3922 if (init == 0)
3923 {
3924 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
3925 ++init;
3926 }
3927
3928 switch (what)
3929 {
3930
3931 case 'C':
3932 if (0 == sl_strncmp (sh.conf.path, preq, 15))
3933 {
3934#if defined(SH_WITH_SERVER)
3935 if (sh.flag.isserver == S_TRUE && sl_strlen(sh.conf.path) == 15)
3936 SL_RETURN( NULL, _("file_path"));
3937 if (sh.flag.isserver == S_TRUE)
3938 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
3939#endif
3940 if (flag == 'R')
3941 SL_RETURN( preq, _("file_path"));
3942 if (flag == 'I')
3943 {
3944 if (sl_strlen(sh.conf.path) == 15)
3945 SL_RETURN( NULL, _("file_path"));
3946 else
3947 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
3948 }
3949 SL_RETURN ( preq, _("file_path"));
3950 }
3951 else
3952 SL_RETURN( sh.conf.path, _("file_path"));
3953 /* break; *//* unreachable */
3954
3955 case 'D':
3956 if (0 == sl_strncmp (sh.data.path, preq, 15))
3957 {
3958 if (flag == 'R')
3959 SL_RETURN( preq, _("file_path"));
3960 if (flag == 'W' && sl_strlen(sh.data.path) == 15)
3961 SL_RETURN (NULL, _("file_path"));
3962 if (flag == 'W')
3963 SL_RETURN( &(sh.data.path[15]), _("file_path"));
3964 }
3965 else
3966 SL_RETURN( sh.data.path, _("file_path"));
3967 break;
3968
3969 default:
3970 SL_RETURN( NULL, _("file_path"));
3971 }
3972
3973 return NULL; /* notreached */
3974}
3975/************************************************/
3976/**** Mlock Utilities ****/
3977/************************************************/
3978
3979#include <limits.h>
3980
3981int sh_unix_pagesize()
3982{
3983 int pagesize = 4096;
3984#if defined(_SC_PAGESIZE)
3985 pagesize = sysconf(_SC_PAGESIZE);
3986#elif defined(_SC_PAGE_SIZE)
3987 pagesize = sysconf(_SC_PAGE_SIZE);
3988#elif defined(HAVE_GETPAGESIZE)
3989 pagesize = getpagesize();
3990#elif defined(PAGESIZE)
3991 pagesize = PAGESIZE;
3992#endif
3993
3994 return ((pagesize > 0) ? pagesize : 4096);
3995}
3996
3997typedef struct sh_page_lt {
3998 unsigned long page_start;
3999 int page_refcount;
4000 char file[64];
4001 int line;
4002 struct sh_page_lt * next;
4003} sh_page_l;
4004
4005sh_page_l * sh_page_locked = NULL;
4006volatile int page_locking = 0;
4007
4008unsigned long sh_unix_lookup_page (void * in_addr, size_t len, int * num_pages)
4009{
4010 int pagesize = sh_unix_pagesize();
4011 unsigned long addr = (unsigned long) in_addr;
4012
4013 unsigned long pagebase;
4014 unsigned long pagediff;
4015 unsigned long pagenum = addr / pagesize;
4016
4017 SL_ENTER(_("sh_unix_lookup_page"));
4018#if 0
4019 fprintf(stderr, "mlock: --> base %ld, pagenum: %ld\n",
4020 addr, pagenum);
4021#endif
4022
4023 /* address of first page
4024 */
4025 pagebase = pagenum * pagesize;
4026
4027 /* number of pages
4028 */
4029 pagediff = (addr + len) - pagebase;
4030 pagenum = pagediff / pagesize;
4031 if (pagenum * pagesize < pagediff)
4032 ++pagenum;
4033
4034#if 0
4035 fprintf(stderr, "mlock: --> pagebase %ld, pagediff %ld, (addr + len) %ld\n",
4036 pagebase, pagediff, (addr + len));
4037#endif
4038
4039 *num_pages = pagenum;
4040 SL_RETURN((pagebase), _("sh_unix_lookup_page"));
4041}
4042
4043
4044#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
4045int sh_unix_mlock (char * file, int line, void * in_addr, size_t len)
4046{
4047 int num_pages;
4048 int status = 0;
4049 int pagesize;
4050 sh_page_l * page_list = sh_page_locked;
4051 unsigned long addr;
4052#ifdef TEST_MLOCK
4053 int i = 0;
4054#endif
4055
4056 SL_ENTER(_("sh_unix_mlock"));
4057
4058 if (0 != page_locking)
4059 {
4060 SL_RETURN((-1), _("sh_unix_mlock"));
4061 }
4062 page_locking = 1;
4063
4064 pagesize = sh_unix_pagesize();
4065 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
4066
4067#ifdef TEST_MLOCK
4068 fprintf(stderr, "mlock: addr %ld, base %ld, pages: %d, length %d\n",
4069 (unsigned long) in_addr, addr, num_pages, len);
4070#endif
4071
4072 /* increase refcount of locked pages
4073 * addr is first page; num_pages is #(consecutive pages) to lock
4074 */
4075 while ((page_list != NULL) && (num_pages > 0))
4076 {
4077#ifdef TEST_MLOCK
4078 fprintf(stderr, "mlock: check page %d: %ld [%d]\n",
4079 i, page_list->page_start, page_list->page_refcount);
4080#endif
4081 if (page_list->page_start == addr)
4082 {
4083 page_list->page_refcount += 1;
4084 num_pages -= 1;
4085 addr += pagesize;
4086#ifdef TEST_MLOCK
4087 fprintf(stderr, "mlock: found page %d: %ld [%d], next page %ld\n",
4088 i, page_list->page_start, page_list->page_refcount, addr);
4089#endif
4090 }
4091#ifdef TEST_MLOCK
4092 ++i;
4093#endif
4094 page_list = page_list->next;
4095 }
4096
4097 /* mlock some more pages, if needed
4098 */
4099 while (num_pages > 0)
4100 {
4101#ifdef TEST_MLOCK
4102 fprintf(stderr, "mlock: lock page %d: mlock %ld [num_pages %d]\n",
4103 i, addr, num_pages);
4104 ++i;
4105#endif
4106 page_list = SH_ALLOC(sizeof(sh_page_l));
4107 page_list->page_start = addr;
4108 page_list->page_refcount = 1;
4109 sl_strlcpy(page_list->file, file, 64);
4110 page_list->line = line;
4111 status = mlock( (void *) addr, pagesize);
4112 if (status != 0)
4113 {
4114#ifdef TEST_MLOCK
4115 fprintf(stderr, "mlock: error: %s\n", sh_error_message(errno));
4116#endif
4117 SH_FREE(page_list);
4118 page_locking = 0;
4119 SL_RETURN((status), _("sh_unix_mlock"));
4120 }
4121 page_list->next = sh_page_locked;
4122 sh_page_locked = page_list;
4123 num_pages -= 1;
4124 addr += pagesize;
4125 }
4126
4127 page_locking = 0;
4128 SL_RETURN((status), _("sh_unix_mlock"));
4129}
4130#else
4131int sh_unix_mlock (char * file, int line, void * in_addr, size_t len)
4132{
4133 (void) file; (void) line;
4134 (void) in_addr; (void) len;
4135 return -1;
4136}
4137#endif
4138
4139#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
4140int sh_unix_munlock (void * in_addr, size_t len)
4141{
4142 int num_pages;
4143 int unlocked = 0;
4144 int status = 0;
4145 int pagesize;
4146 sh_page_l * page_list = sh_page_locked;
4147 sh_page_l * page_last;
4148 unsigned long addr;
4149
4150 int test_count;
4151 int test_status;
4152 int test_pages;
4153
4154#ifdef TEST_MLOCK
4155 int i = 0;
4156#endif
4157
4158 SL_ENTER(_("sh_unix_munlock"));
4159
4160 if (0 != page_locking)
4161 {
4162 SL_RETURN((-1), _("sh_unix_munlock"));
4163 }
4164 page_locking = 1;
4165
4166 pagesize = sh_unix_pagesize();
4167 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
4168
4169#ifdef TEST_MLOCK
4170 fprintf(stderr, "munlock: in_addr %ld, addr %ld, pages: %d, length %d\n",
4171 (unsigned long) in_addr, addr, num_pages, len);
4172#endif
4173
4174 test_pages = num_pages;
4175
4176 /* reduce refcount of locked pages
4177 * addr is first page; num_pages is #(consecutive pages) to lock
4178 */
4179 while ((page_list != NULL) && (num_pages > 0))
4180 {
4181#ifdef TEST_MLOCK
4182 fprintf(stderr, "munlock: page %d: %ld [%d]\n",
4183 i, page_list->page_start, page_list->page_refcount);
4184#endif
4185
4186 test_status = 0;
4187 for (test_count = 0; test_count < test_pages; ++test_count)
4188 {
4189 if (page_list->page_start == (addr + (test_count * pagesize)))
4190 {
4191 test_status = 1;
4192 break;
4193 }
4194 }
4195
4196 if (test_status == 1)
4197 {
4198 page_list->page_refcount -= 1;
4199 if (page_list->page_refcount == 0)
4200 {
4201 status = munlock ( (void *) addr, pagesize);
4202 ++unlocked;
4203 }
4204 num_pages -= 1;
4205#ifdef TEST_MLOCK
4206 fprintf(stderr,
4207 "munlock: page %d: %ld [refcount %d], refcount reduced\n",
4208 i, page_list->page_start, page_list->page_refcount);
4209#endif
4210 }
4211#ifdef TEST_MLOCK
4212 ++i;
4213#endif
4214 page_list = page_list->next;
4215 }
4216
4217#ifdef TEST_MLOCK
4218 i = 0;
4219#endif
4220
4221 if (unlocked > 0)
4222 {
4223 page_list = sh_page_locked;
4224 page_last = sh_page_locked;
4225
4226 while ((page_list != NULL) && (unlocked > 0))
4227 {
4228 if (page_list->page_refcount == 0)
4229 {
4230#ifdef TEST_MLOCK
4231 fprintf(stderr, "munlock: remove page %d: %ld [refcount %d]\n",
4232 i, page_list->page_start, page_list->page_refcount);
4233#endif
4234 if (page_last != page_list)
4235 {
4236 page_last->next = page_list->next;
4237 SH_FREE(page_list);
4238 page_list = page_last->next;
4239 }
4240 else
4241 {
4242 page_last = page_list->next;
4243 if (page_list == sh_page_locked)
4244 sh_page_locked = page_list->next;
4245 SH_FREE(page_list);
4246 page_list = page_last;
4247 }
4248 --unlocked;
4249 }
4250 else
4251 {
4252#ifdef TEST_MLOCK
4253 fprintf(stderr, "munlock: skip page %d: %ld [refcount %d]\n",
4254 i, page_list->page_start, page_list->page_refcount);
4255#endif
4256
4257 page_last = page_list;
4258 page_list = page_list->next;
4259 }
4260#ifdef TEST_MLOCK
4261 ++i;
4262#endif
4263 }
4264 }
4265
4266 page_locking = 0;
4267 SL_RETURN((status), _("sh_unix_munlock"));
4268}
4269#else
4270int sh_unix_munlock (void * in_addr, size_t len)
4271{
4272 (void) in_addr; (void) len;
4273 return -1;
4274}
4275#endif
4276
4277int sh_unix_count_mlock()
4278{
4279 int i = 0;
4280 char str[128];
4281 sh_page_l * page_list = sh_page_locked;
4282
4283 SL_ENTER(_("sh_unix_count_mlock"));
4284 while (page_list != NULL)
4285 {
4286#ifdef WITH_TPT
4287 sl_snprintf(str, sizeof(str), _("file: %s line: %d page: %d"),
4288 page_list->file, page_list->line, i+1);
4289 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, i, MSG_E_SUBGEN,
4290 str, _("sh_unix_count_mlock"));
4291#endif
4292 page_list = page_list->next;
4293 ++i;
4294 }
4295 sl_snprintf(str, sizeof(str), _("%d pages locked"), i);
4296 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, i, MSG_E_SUBGEN,
4297 str, _("sh_unix_count_mlock"));
4298 SL_RETURN((i), _("sh_unix_count_mlock"));
4299}
4300
4301/************************************************/
4302/************************************************/
4303/**** Stealth Utilities ****/
4304/************************************************/
4305/************************************************/
4306#ifdef SH_STEALTH
4307
4308void sh_unix_xor_code (char * str, int len)
4309{
4310 register int i;
4311
4312 for (i = 0; i < len; ++i) str[i] ^= (char) XOR_CODE;
4313 return;
4314}
4315
4316#if !defined(SH_STEALTH_MICRO)
4317
4318
4319int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len);
4320unsigned long first_hex_block(SL_TICKET fd, unsigned long * max);
4321
4322/*
4323 * --- Get hidden data from a block of hex data. ---
4324 */
4325int sh_unix_getline_stealth (SL_TICKET fd, char * str, int len)
4326{
4327 int add_off, llen;
4328 static unsigned long off_data = 0;
4329 static unsigned long max_data = 0;
4330 static int stealth_init = BAD;
4331
4332 SL_ENTER(_("sh_unix_getline_stealth"));
4333
4334
4335 /* --- Initialize. ---
4336 */
4337 if (stealth_init == BAD)
4338 {
4339 off_data = first_hex_block(fd, &max_data);
4340 if (off_data == 0)
4341 {
4342 dlog(1, FIL__, __LINE__,
4343 _("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"));
4344 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
4345 _("Stealth config file."));
4346 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
4347 }
4348 stealth_init = GOOD;
4349 max_data += off_data;
4350 }
4351
4352 /* --- Seek to proper position. ---
4353 */
4354 if (off_data >= max_data)
4355 {
4356 dlog(1, FIL__, __LINE__,
4357 _("The capacity of the container image file for the stealth config file seems to be too small. Your config file is likely truncated.\n"));
4358 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
4359 _("Stealth config file."));
4360 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
4361 }
4362 sl_seek(fd, off_data);
4363
4364 /* --- Read one line. ---
4365 */
4366 add_off = hideout_hex_block(fd, (unsigned char *) str, len);
4367 off_data += add_off;
4368
4369 llen = sl_strlen(str);
4370 SL_RETURN(llen, _("sh_unix_getline_stealth"));
4371}
4372
4373int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len)
4374{
4375
4376 register int i, j, k;
4377 unsigned char c, e;
4378 register int num;
4379 unsigned char mask[9] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
4380 unsigned long here = 0;
4381 unsigned long retval = 0;
4382
4383 SL_ENTER(_("hideout_hex_block"));
4384
4385 ASSERT_RET((len > 1), _("len > 1"), (0));
4386
4387 --len;
4388
4389 i = 0;
4390 while (i < len)
4391 {
4392 for (j = 0; j < 8; ++j)
4393 {
4394
4395 /* --- Get a low byte, modify, read back. ---
4396 */
4397 for (k = 0; k < 2; ++k)
4398 {
4399 /* -- Skip whitespace. ---
4400 */
4401 c = ' ';
4402 do {
4403 do {
4404 num = sl_read (fd, &c, 1);
4405 } while (num == 0 && errno == EINTR);
4406 if (num == 0)
4407 SL_RETURN((0), _("hideout_hex_block"));
4408 ++here;
4409 } while (c == '\n' || c == '\t' || c == '\r' ||
4410 c == ' ');
4411 }
4412
4413
4414 /* --- e is the value of the low byte. ---
4415 */
4416 e = (unsigned char) sh_util_hexchar( c );
4417 if ((e & mask[7]) != 0) /* bit is set */
4418 str[i] |= mask[j];
4419 else /* bit is not set */
4420 str[i] &= ~mask[j];
4421
4422 }
4423 if (str[i] == '\n') break;
4424 ++i;
4425 }
4426
4427 if (i != 0)
4428 str[i] = '\0';
4429 else
4430 str[i+1] = '\0'; /* keep newline and terminate */
4431 retval += here;
4432
4433 SL_RETURN(retval, _("hideout_hex_block"));
4434}
4435
4436/* --- Get offset of first data block. ---
4437 */
4438unsigned long first_hex_block(SL_TICKET fd, unsigned long * max)
4439{
4440 unsigned int i;
4441 long num = 1;
4442 unsigned long lnum;
4443 char c;
4444 int nothex = 0;
4445 unsigned long retval = 0;
4446 unsigned int this_line = 0;
4447 char theline[SH_BUFSIZE];
4448
4449 SL_ENTER(_("first_hex_block"));
4450
4451 *max = 0;
4452
4453 while (1)
4454 {
4455 theline[0] = '\0';
4456 this_line = 0;
4457 c = '\0';
4458 while (c != '\n' && num > 0 && this_line < (sizeof(theline)-1))
4459 {
4460 do {
4461 num = sl_read (fd, &c, 1);
4462 } while (num == 0 && errno == EINTR);
4463 if (num > 0)
4464 theline[this_line] = c;
4465 else
4466 SL_RETURN((0), _("first_hex_block"));
4467 ++this_line;
4468 }
4469 theline[this_line] = '\0';
4470
4471 /* not only 'newline' */
4472 if (this_line > 60)
4473 {
4474 nothex = 0;
4475 i = 0;
4476 while (nothex == 0 && i < (this_line-1))
4477 {
4478 if (! isxdigit((int)theline[i])) nothex = 1;
4479 ++i;
4480 }
4481 if (nothex == 1) retval += this_line;
4482 }
4483 else
4484 {
4485 nothex = 1;
4486 retval += this_line;
4487 }
4488
4489 if (nothex == 0)
4490 {
4491 *max = 0;
4492 do {
4493 do {
4494 num = sl_read (fd, theline, SH_BUFSIZE);
4495 } while (num == 0 && errno == EINTR);
4496 if (num > 0)
4497 {
4498 lnum = (unsigned long) num;
4499 for (i = 0; i < lnum; ++i)
4500 {
4501 c = theline[i];
4502 if (c == '\n' || c == '\t' || c == '\r' || c == ' ')
4503 ;
4504 else if (!isxdigit((int)c))
4505 break;
4506 else
4507 *max += 1;
4508 }
4509 }
4510 } while (num > 0);
4511
4512 *max /= 16;
4513 SL_RETURN((retval), _("first_hex_block"));
4514 }
4515
4516 }
4517 /* SL_RETURN((0), _("first_hex_block")); *//* unreachable */
4518}
4519
4520 /* if !defined(SH_STEALTH_MICRO) */
4521#endif
4522
4523 /* ifdef SH_STEALTH */
4524#endif
4525
4526/*
4527 * anti-debugger code
4528 */
4529#if defined(SCREW_IT_UP)
4530volatile int sh_not_traced = 0;
4531
4532#ifdef HAVE_GETTIMEOFDAY
4533struct timeval save_tv;
4534#endif
4535
4536void sh_sigtrap_handler (int signum)
4537{
4538#ifdef HAVE_GETTIMEOFDAY
4539 struct timeval tv;
4540 long difftv;
4541
4542 gettimeofday(&tv, NULL);
4543 difftv = (tv.tv_sec - save_tv.tv_sec) * 1000000 +
4544 (tv.tv_usec - save_tv.tv_usec);
4545 if (difftv > 500000)
4546 _exit(6);
4547#endif
4548 sh_not_traced += signum;
4549 return;
4550}
4551#endif
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