source: trunk/src/sh_unix.c@ 582

Last change on this file since 582 was 580, checked in by katerina, 13 months ago

Fix for ticket #468 (file attributes). Also add option to switch off check.
File size: 134.2 KB
Line 
1/* SAMHAIN file system integrity testing */
2/* Copyright (C) 1999 Rainer Wichmann */
3/* */
4/* This program is free software; you can redistribute it */
5/* and/or modify */
6/* it under the terms of the GNU General Public License as */
7/* published by */
8/* the Free Software Foundation; either version 2 of the License, or */
9/* (at your option) any later version. */
10/* */
11/* This program is distributed in the hope that it will be useful, */
12/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
13/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
14/* GNU General Public License for more details. */
15/* */
16/* You should have received a copy of the GNU General Public License */
17/* along with this program; if not, write to the Free Software */
18/* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20#include "config_xor.h"
21
22
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26#include <ctype.h>
27#ifdef HAVE_LINUX_FS_H
28#include <linux/fs.h>
29#endif
30
31#ifdef HAVE_MEMORY_H
32#include <memory.h>
33#endif
34
35#ifdef HAVE_UNISTD_H
36#include <errno.h>
37#include <signal.h>
38#include <pwd.h>
39#include <grp.h>
40#include <sys/types.h>
41#include <sys/stat.h>
42#include <sys/resource.h>
43#include <fcntl.h>
44#include <unistd.h>
45/* need to undef these, since the #define's may be picked up from
46 * linux/wait.h, and will clash with a typedef in sys/wait.h
47 */
48#undef P_ALL
49#undef P_PID
50#undef P_PGID
51#include <sys/wait.h>
52
53/*********************
54#ifdef HAVE_SYS_VFS_H
55#include <sys/vfs.h>
56#endif
57**********************/
58#endif
59
60#if TIME_WITH_SYS_TIME
61#include <sys/time.h>
62#include <time.h>
63#else
64#if HAVE_SYS_TIME_H
65#include <sys/time.h>
66#else
67#include <time.h>
68#endif
69#endif
70
71#ifdef HAVE_SYS_SELECT_H
72#include <sys/select.h>
73#endif
74
75#ifndef FD_SET
76#define NFDBITS 32
77#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
78#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
79#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
80#endif /* !FD_SET */
81#ifndef FD_SETSIZE
82#define FD_SETSIZE 32
83#endif
84#ifndef FD_ZERO
85#define FD_ZERO(p) memset((char *)(p), 0, sizeof(*(p)))
86#endif
87
88
89#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
90#include <sys/mman.h>
91#endif
92
93#include "samhain.h"
94#include "sh_error.h"
95#include "sh_unix.h"
96#include "sh_utils.h"
97#include "sh_mem.h"
98#include "sh_hash.h"
99#include "sh_tools.h"
100#include "sh_restrict.h"
101#include "sh_ipvx.h"
102#include "sh_tiger.h"
103#include "sh_prelink.h"
104#include "sh_pthread.h"
105#include "sh_sem.h"
106
107/* moved here from far below
108 */
109#include <netdb.h>
110
111#define SH_NEED_PWD_GRP
112#define SH_NEED_GETHOSTBYXXX
113#include "sh_static.h"
114
115#ifndef HAVE_LSTAT
116#define lstat stat
117#endif
118
119#if defined(S_IFLNK) && !defined(S_ISLNK)
120#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
121#else
122#if !defined(S_ISLNK)
123#define S_ISLNK(mode) (0)
124#endif
125#endif
126
127#if defined(S_IFSOCK) && !defined(S_ISSOCK)
128#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
129#else
130#if !defined(S_ISSOCK)
131#define S_ISSOCK(mode) (0)
132#endif
133#endif
134
135#if defined(S_IFDOOR) && !defined(S_ISDOOR)
136#define S_ISDOOR(mode) (((mode) & S_IFMT) == S_IFDOOR)
137#else
138#if !defined(S_ISDOOR)
139#define S_ISDOOR(mode) (0)
140#endif
141#endif
142
143#if defined(S_IFPORT) && !defined(S_ISPORT)
144#define S_ISPORT(mode) (((mode) & S_IFMT) == S_IFPORT)
145#else
146#if !defined(S_ISPORT)
147#define S_ISPORT(mode) (0)
148#endif
149#endif
150
151#define SH_KEY_NULL _("000000000000000000000000000000000000000000000000")
152
153#undef FIL__
154#define FIL__ _("sh_unix.c")
155
156unsigned long mask_PRELINK = MASK_PRELINK_;
157unsigned long mask_USER0 = MASK_USER_;
158unsigned long mask_USER1 = MASK_USER_;
159unsigned long mask_USER2 = MASK_USER_;
160unsigned long mask_USER3 = MASK_USER_;
161unsigned long mask_USER4 = MASK_USER_;
162unsigned long mask_ALLIGNORE = MASK_ALLIGNORE_;
163unsigned long mask_ATTRIBUTES = MASK_ATTRIBUTES_;
164unsigned long mask_LOGFILES = MASK_LOGFILES_;
165unsigned long mask_LOGGROW = MASK_LOGGROW_;
166unsigned long mask_READONLY = MASK_READONLY_;
167unsigned long mask_NOIGNORE = MASK_NOIGNORE_;
168
169
170extern char **environ;
171
172int sh_unix_maskreset()
173{
174 mask_PRELINK = MASK_PRELINK_;
175 mask_USER0 = MASK_USER_;
176 mask_USER1 = MASK_USER_;
177 mask_USER2 = MASK_USER_;
178 mask_USER3 = MASK_USER_;
179 mask_USER4 = MASK_USER_;
180 mask_ALLIGNORE = MASK_ALLIGNORE_;
181 mask_ATTRIBUTES = MASK_ATTRIBUTES_;
182 mask_LOGFILES = MASK_LOGFILES_;
183 mask_LOGGROW = MASK_LOGGROW_;
184 mask_READONLY = MASK_READONLY_;
185 mask_NOIGNORE = MASK_NOIGNORE_;
186 return 0;
187}
188
189
190#ifdef SYS_SIGLIST_DECLARED
191/* extern const char * const sys_siglist[]; */
192#else
193char * sh_unix_siglist (int signum)
194{
195 switch (signum)
196 {
197#ifdef SIGHUP
198 case SIGHUP:
199 return _("Hangup");
200#endif
201#ifdef SIGINT
202 case SIGINT:
203 return _("Interrupt");
204#endif
205#ifdef SIGQUIT
206 case SIGQUIT:
207 return _("Quit");
208#endif
209#ifdef SIGILL
210 case SIGILL:
211 return _("Illegal instruction");
212#endif
213#ifdef SIGTRAP
214 case SIGTRAP:
215 return _("Trace/breakpoint trap");
216#endif
217#ifdef SIGABRT
218 case SIGABRT:
219 return _("IOT trap/Abort");
220#endif
221#ifdef SIGBUS
222 case SIGBUS:
223 return _("Bus error");
224#endif
225#ifdef SIGFPE
226 case SIGFPE:
227 return _("Floating point exception");
228#endif
229#ifdef SIGUSR1
230 case SIGUSR1:
231 return _("User defined signal 1");
232#endif
233#ifdef SIGSEGV
234 case SIGSEGV:
235 return _("Segmentation fault");
236#endif
237#ifdef SIGUSR2
238 case SIGUSR2:
239 return _("User defined signal 2");
240#endif
241#ifdef SIGPIPE
242 case SIGPIPE:
243 return _("Broken pipe");
244#endif
245#ifdef SIGALRM
246 case SIGALRM:
247 return _("Alarm clock");
248#endif
249#ifdef SIGTERM
250 case SIGTERM:
251 return _("Terminated");
252#endif
253#ifdef SIGSTKFLT
254 case SIGSTKFLT:
255 return _("Stack fault");
256#endif
257#ifdef SIGCHLD
258 case SIGCHLD:
259 return _("Child exited");
260#endif
261#ifdef SIGCONT
262 case SIGCONT:
263 return _("Continued");
264#endif
265#ifdef SIGSTOP
266 case SIGSTOP:
267 return _("Stopped");
268#endif
269#ifdef SIGTSTP
270 case SIGTSTP:
271 return _("Stop typed at tty");
272#endif
273#ifdef SIGTTIN
274 case SIGTTIN:
275 return _("Stopped (tty input)");
276#endif
277#ifdef SIGTTOU
278 case SIGTTOU:
279 return _("Stopped (tty output)");
280#endif
281#ifdef SIGURG
282 case SIGURG:
283 return _("Urgent condition");
284#endif
285#ifdef SIGXCPU
286 case SIGXCPU:
287 return _("CPU time limit exceeded");
288#endif
289#ifdef SIGXFSZ
290 case SIGXFSZ:
291 return _("File size limit exceeded");
292#endif
293#ifdef SIGVTALRM
294 case SIGVTALRM:
295 return _("Virtual time alarm");
296#endif
297#ifdef SIGPROF
298 case SIGPROF:
299 return _("Profile signal");
300#endif
301#ifdef SIGWINCH
302 case SIGWINCH:
303 return _("Window size changed");
304#endif
305#ifdef SIGIO
306 case SIGIO:
307 return _("Possible I/O");
308#endif
309#ifdef SIGPWR
310 case SIGPWR:
311 return _("Power failure");
312#endif
313#ifdef SIGUNUSED
314 case SIGUNUSED:
315 return _("Unused signal");
316#endif
317 }
318 return _("Unknown");
319}
320#endif
321
322
323/* Log from within a signal handler without using any
324 * functions that are not async signal safe.
325 *
326 * This is the safe_itoa helper function.
327 */
328char * safe_itoa(int i, char * str, int size)
329{
330 unsigned int u;
331 int iisneg = 0;
332 char *p = &str[size-1];
333
334 *p = '\0';
335 if (i < 0) {
336 iisneg = 1;
337 u = ((unsigned int)(-(1+i))) + 1;
338 } else {
339 u = i;
340 }
341 do {
342 --p;
343 *p = '0' + (u % 10);
344 u /= 10;
345 } while (u && (p != str));
346 if ((iisneg == 1) && (p != str)) {
347 --p;
348 *p = '-';
349 }
350 return p;
351}
352
353/* Log from within a signal handler without using any
354 * functions that are not async signal safe.
355 *
356 * This is the safe_logger function.
357 * Arguments: signal (signal number), method (0=logger, 1=stderr), thepid (pid)
358 */
359extern int OnlyStderr;
360
361int safe_logger (int thesignal, int method, char * details)
362{
363 unsigned int i = 0;
364 int status = -1;
365 struct stat buf;
366 pid_t newpid;
367 char str[128];
368 char * p;
369
370 char l0[64], l1[64], l2[64], l3[64];
371 char a0[32];
372 char e0[128];
373 char msg[128];
374
375 char * locations[] = { NULL, NULL, NULL, NULL, NULL };
376 char * envp[] = { NULL, NULL };
377 char * argp[] = { NULL, NULL, NULL };
378
379 pid_t thepid = getpid();
380
381 if ((sh.flag.isdaemon == S_FALSE) || (OnlyStderr == S_TRUE))
382 method = 1;
383
384 /* seems that solaris cc needs this way of initializing ...
385 */
386 locations[0] = l0;
387 locations[1] = l1;
388 locations[2] = l2;
389 locations[3] = l3;
390
391 envp[0] = e0;
392 argp[0] = a0;
393
394 sl_strlcpy(msg, _("samhain["), 128);
395 p = safe_itoa((int) thepid, str, 128);
396 if (p && *p)
397 sl_strlcat(msg, p, 128);
398 if (thesignal == 0)
399 {
400 if (details == NULL) {
401 sl_strlcat(msg, _("]: out of memory"), 128);
402 } else {
403 sl_strlcat(msg, _("]: "), 128);
404 sl_strlcat(msg, details, 128);
405 }
406 }
407 else
408 {
409 sl_strlcat(msg, _("]: exit on signal "), 128);
410 p = safe_itoa(thesignal, str, 128);
411 if (p && *p)
412 sl_strlcat(msg, p, 128);
413 }
414
415 if (method == 1) {
416#ifndef STDERR_FILENO
417#define STDERR_FILENO 2
418#endif
419 int retval = 0;
420 do {
421 retval = write(STDERR_FILENO, msg, strlen(msg));
422 } while (retval < 0 && errno == EINTR);
423 do {
424 retval = write(STDERR_FILENO, "\n", 1);
425 } while (retval < 0 && errno == EINTR);
426 return 0;
427 }
428
429 sl_strlcpy (l0, _("/usr/bin/logger"), 64);
430 sl_strlcpy (l1, _("/usr/sbin/logger"), 64);
431 sl_strlcpy (l2, _("/usr/ucb/logger"), 64);
432 sl_strlcpy (l3, _("/bin/logger"), 64);
433
434 sl_strlcpy (a0, _("logger"), 32);
435 sl_strlcpy (e0,
436 _("PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/ucb:/usr/local/bin"),
437 128);
438
439 while (locations[i] != NULL) {
440 status = stat(locations[i], &buf);
441 if (status == 0)
442 break;
443 ++i;
444 }
445
446 if (locations[i] != NULL) {
447 argp[1] = msg;
448 newpid = fork();
449 if (newpid == 0) {
450 execve(locations[i], argp, envp);
451 _exit(1);
452 }
453 else if (newpid > 0) {
454 waitpid(newpid, &status, WUNTRACED);
455 }
456 }
457 return 0;
458}
459
460void safe_fatal (const char * details,
461 const char * file, int line)
462{
463 char msg[128];
464 char str[128];
465 char * p;
466 int thesignal = 0;
467 int method = 0;
468
469 p = safe_itoa((int) line, str, 128);
470 sl_strlcpy(msg, _("FATAL: "), 128);
471 sl_strlcat(msg, file, 128);
472 sl_strlcat(msg, ": ", 128);
473 if (p && (*p)) {
474 sl_strlcat(msg, p , 128);
475 sl_strlcat(msg, ": ", 128);
476 }
477 sl_strlcat(msg, details, 128);
478 (void) safe_logger (thesignal, method, msg);
479
480 close_ipc ();
481 raise(SIGKILL);
482}
483
484extern char sh_sig_msg[64];
485
486volatile int immediate_exit_normal = 0;
487
488#if defined(SA_SIGACTION_WORKS)
489static
490void sh_unix_sigexit (int mysignal, siginfo_t * signal_info, void * signal_add)
491#else
492static
493void sh_unix_sigexit (int mysignal)
494#endif
495{
496
497#if defined(SA_SIGACTION_WORKS)
498 if (signal_info != NULL && signal_info->si_code == SI_USER &&
499 mysignal != SIGTERM && mysignal != SIGINT)
500 {
501 return;
502 }
503
504 /* avoid compiler warning (unused var)
505 */
506 (void) signal_add;
507#endif
508
509 /*
510 * Block re-entry
511 */
512 if (immediate_exit_normal > 0)
513 {
514 ++immediate_exit_normal;
515 if ((skey != NULL) && (immediate_exit_normal == 2))
516 memset (skey, 0, sizeof(sh_key_t));
517 if (immediate_exit_normal == 2)
518 {
519 int val_return;
520
521 do {
522 val_return = chdir ("/");
523 } while (val_return < 0 && errno == EINTR);
524
525 close_ipc ();
526 safe_logger (mysignal, 0, NULL);
527 }
528 raise(SIGKILL);
529 }
530 else
531 {
532 immediate_exit_normal = 1;
533 }
534
535#ifdef SYS_SIGLIST_DECLARED
536 strncpy (sh_sig_msg, sys_siglist[mysignal], 40);
537#else
538 strncpy (sh_sig_msg, sh_unix_siglist(mysignal), 40);
539#endif
540 sh_sig_msg[63] = '\0';
541
542 ++sig_raised;
543 ++sig_urgent;
544 sig_termfast = 1;
545 return;
546}
547
548volatile int immediate_exit_fast = 0;
549
550#if defined(SA_SIGACTION_WORKS)
551static
552void sh_unix_sigexit_fast (int mysignal, siginfo_t * signal_info,
553 void * signal_add)
554#else
555static
556void sh_unix_sigexit_fast (int mysignal)
557#endif
558{
559#if defined(SL_DEBUG) && (defined(USE_SYSTEM_MALLOC) || !defined(USE_MALLOC_LOCK))
560 int retval;
561#endif
562
563#if defined(SA_SIGACTION_WORKS)
564 if (signal_info != NULL && signal_info->si_code == SI_USER)
565 {
566 return;
567 }
568#endif
569
570 /* avoid compiler warning (unused var)
571 */
572#if defined(SA_SIGACTION_WORKS)
573 (void) signal_add;
574#endif
575
576 /* Check whether the heap is ok; otherwise _exit
577 */
578#if !defined(SL_DEBUG) || (!defined(USE_SYSTEM_MALLOC) && defined(USE_MALLOC_LOCK))
579 ++immediate_exit_fast;
580 if (skey != NULL && immediate_exit_fast < 2)
581 memset (skey, 0, sizeof(sh_key_t));
582 if (immediate_exit_fast < 2)
583 safe_logger (mysignal, 0, NULL);
584 raise(SIGKILL);
585#else
586
587 /* debug code
588 */
589 if (immediate_exit_fast == 1)
590 {
591 ++immediate_exit_fast;
592 if (skey != NULL)
593 memset (skey, 0, sizeof(sh_key_t));
594 close_ipc ();
595 safe_logger (mysignal, 0, NULL);
596 do {
597 retval = chdir ("/");
598 } while (retval < 0 && errno == EINTR);
599 raise(SIGFPE);
600 }
601 else if (immediate_exit_fast == 2)
602 {
603 do {
604 retval = chdir ("/");
605 } while (retval < 0 && errno == EINTR);
606 raise(SIGFPE);
607 }
608 else if (immediate_exit_fast != 0)
609 {
610 raise(SIGKILL);
611 }
612
613 ++immediate_exit_fast;
614
615 /* The FPE|BUS|SEGV|ILL signals leave the system in an undefined
616 * state, thus it is best to exit immediately.
617 */
618#ifdef SYS_SIGLIST_DECLARED
619 strncpy (sh_sig_msg, sys_siglist[mysignal], 40);
620#else
621 strncpy (sh_sig_msg, sh_unix_siglist(mysignal), 40);
622#endif
623 sh_sig_msg[63] = '\0';
624
625 sl_stack_print();
626
627 /* Try to push out an error message.
628 */
629 sh_error_handle ((-1), FIL__, __LINE__, mysignal, MSG_EXIT_NORMAL,
630 sh.prg_name, sh_sig_msg);
631
632 if (skey != NULL)
633 memset (skey, 0, sizeof(sh_key_t));
634 close_ipc ();
635
636 do {
637 retval = chdir ("/");
638 } while (retval < 0 && errno == EINTR);
639
640 raise(SIGFPE);
641#endif
642}
643
644
645static
646void sh_unix_sigaction (int mysignal)
647{
648 ++sig_raised;
649#ifdef SIGUSR1
650 if (mysignal == SIGUSR1)
651 sig_debug_switch = 1;
652#endif
653#ifdef SIGUSR2
654 if (mysignal == SIGUSR2)
655 {
656 ++sig_suspend_switch;
657 ++sig_urgent;
658 }
659#endif
660#ifdef SIGHUP
661 if (mysignal == SIGHUP)
662 sig_config_read_again = 1;
663#endif
664#ifdef SIGTTOU
665 if (mysignal == SIGTTOU) {
666 sig_force_check = 1; sh_sem_trylock(); }
667#endif
668#ifdef SIGTSTP
669 if (mysignal == SIGTSTP) {
670 sig_force_check = 1; sig_force_silent = 1; sh_sem_trylock(); }
671#endif
672#ifdef SIGTTIN
673 if (mysignal == SIGTTIN)
674 sig_fresh_trail = 1;
675#endif
676#ifdef SIGABRT
677 if (mysignal == SIGABRT)
678 sig_fresh_trail = 1;
679#endif
680#ifdef SIGQUIT
681 if (mysignal == SIGQUIT)
682 sig_terminate = 1;
683#endif
684#ifdef SIGTERM
685 if (mysignal == SIGTERM)
686 {
687 strncpy (sh_sig_msg, _("Terminated"), 40);
688 sig_termfast = 1;
689 ++sig_urgent;
690 }
691#endif
692
693 return;
694}
695
696void sh_unix_ign_sigpipe()
697{
698 struct sigaction ignact;
699
700 ignact.sa_handler = SIG_IGN; /* signal action */
701 sigemptyset( &ignact.sa_mask ); /* set an empty mask */
702 ignact.sa_flags = 0; /* init sa_flags */
703
704#ifdef SIGPIPE
705 retry_sigaction(FIL__, __LINE__, SIGPIPE, &ignact, NULL);
706#endif
707
708 return;
709}
710static
711void sh_unix_siginstall (int goDaemon)
712{
713 struct sigaction act, act_fast, act2, oldact, ignact;
714#if defined (SH_WITH_SERVER)
715 (void) goDaemon;
716#endif
717
718 SL_ENTER(_("sh_unix_siginstall"));
719
720 ignact.sa_handler = SIG_IGN; /* signal action */
721 sigemptyset( &ignact.sa_mask ); /* set an empty mask */
722 ignact.sa_flags = 0; /* init sa_flags */
723
724#if defined(SA_SIGACTION_WORKS)
725 act.sa_sigaction = &sh_unix_sigexit; /* signal action */
726#else
727 act.sa_handler = &sh_unix_sigexit; /* signal action */
728#endif
729
730 sigfillset ( &act.sa_mask ); /* set a full mask */
731
732
733 /* Block all but deadly signals.
734 */
735#ifdef SIGILL
736 sigdelset ( &act.sa_mask, SIGILL );
737#endif
738#ifndef SL_DEBUG
739#ifdef SIGFPE
740 sigdelset ( &act.sa_mask, SIGFPE );
741#endif
742#endif
743#ifdef SIGSEGV
744 sigdelset ( &act.sa_mask, SIGSEGV );
745#endif
746#ifdef SIGBUS
747 sigdelset ( &act.sa_mask, SIGBUS );
748#endif
749
750#if defined(SA_SIGACTION_WORKS)
751 act_fast.sa_sigaction = &sh_unix_sigexit_fast; /* signal action */
752#else
753 act_fast.sa_handler = &sh_unix_sigexit_fast; /* signal action */
754#endif
755
756 sigfillset ( &act_fast.sa_mask ); /* set a full mask */
757
758#ifdef SIGILL
759 sigdelset ( &act_fast.sa_mask, SIGILL );
760#endif
761#ifndef SL_DEBUG
762#ifdef SIGFPE
763 sigdelset ( &act_fast.sa_mask, SIGFPE );
764#endif
765#endif
766#ifdef SIGSEGV
767 sigdelset ( &act_fast.sa_mask, SIGSEGV );
768#endif
769#ifdef SIGBUS
770 sigdelset ( &act_fast.sa_mask, SIGBUS );
771#endif
772
773
774 /* Use siginfo to verify origin of signal, if possible.
775 */
776#if defined(SA_SIGACTION_WORKS)
777 act.sa_flags = SA_SIGINFO;
778 act_fast.sa_flags = SA_SIGINFO;
779#else
780 act.sa_flags = 0;
781 act_fast.sa_flags = 0;
782#endif
783
784 /* Do not block the signal from being received in its handler ...
785 * (is this a good or a bad idea ??).
786 */
787#if defined(SA_NOMASK)
788 act_fast.sa_flags |= SA_NOMASK;
789#elif defined(SA_NODEFER)
790 act_fast.sa_flags |= SA_NODEFER;
791#endif
792
793
794 act2.sa_handler = &sh_unix_sigaction; /* signal action */
795 sigemptyset( &act2.sa_mask ); /* set an empty mask */
796 act2.sa_flags = 0; /* init sa_flags */
797
798 /* signals to control the daemon */
799
800#ifdef SIGHUP
801 retry_sigaction(FIL__, __LINE__, SIGHUP, &act2, &oldact);
802#endif
803#ifdef SIGABRT
804 retry_sigaction(FIL__, __LINE__, SIGABRT, &act2, &oldact);
805#endif
806#ifdef SIGUSR1
807 retry_sigaction(FIL__, __LINE__, SIGUSR1, &act2, &oldact);
808#endif
809#ifdef SIGUSR2
810 retry_sigaction(FIL__, __LINE__, SIGUSR2, &act2, &oldact);
811#endif
812#ifdef SIGQUIT
813 retry_sigaction(FIL__, __LINE__, SIGQUIT, &act2, &oldact);
814#endif
815#ifdef SIGTERM
816 retry_sigaction(FIL__, __LINE__, SIGTERM, &act, &oldact);
817#endif
818
819 /* fatal signals that may cause termination */
820
821#ifdef SIGILL
822 retry_sigaction(FIL__, __LINE__, SIGILL, &act_fast, &oldact);
823#endif
824#ifndef SL_DEBUG
825#ifdef SIGFPE
826 retry_sigaction(FIL__, __LINE__, SIGFPE, &act_fast, &oldact);
827#endif
828#endif
829#ifdef SIGSEGV
830 retry_sigaction(FIL__, __LINE__, SIGSEGV, &act_fast, &oldact);
831#endif
832#ifdef SIGBUS
833 retry_sigaction(FIL__, __LINE__, SIGBUS, &act_fast, &oldact);
834#endif
835
836 /* other signals */
837
838#ifdef SIGINT
839 retry_sigaction(FIL__, __LINE__, SIGINT, &act, &oldact);
840#endif
841#ifdef SIGPIPE
842 retry_sigaction(FIL__, __LINE__, SIGPIPE, &ignact, &oldact);
843#endif
844#ifdef SIGALRM
845 retry_sigaction(FIL__, __LINE__, SIGALRM, &ignact, &oldact);
846#endif
847
848#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
849#ifdef SIGTTOU
850 if (goDaemon == 1)
851 retry_sigaction(FIL__, __LINE__, SIGTTOU, &act2, &oldact);
852 else
853 retry_sigaction(FIL__, __LINE__, SIGTTOU, &ignact, &oldact);
854#endif
855#ifdef SIGTSTP
856 if (goDaemon == 1)
857 retry_sigaction(FIL__, __LINE__, SIGTSTP, &act2, &oldact);
858 else
859 retry_sigaction(FIL__, __LINE__, SIGTSTP, &ignact, &oldact);
860#endif
861#ifdef SIGTTIN
862 if (goDaemon == 1)
863 retry_sigaction(FIL__, __LINE__, SIGTTIN, &act2, &oldact);
864 else
865 retry_sigaction(FIL__, __LINE__, SIGTTIN, &ignact, &oldact);
866#endif
867#else
868#ifdef SIGTSTP
869 retry_sigaction(FIL__, __LINE__, SIGTSTP, &ignact, &oldact);
870#endif
871#ifdef SIGTTOU
872 retry_sigaction(FIL__, __LINE__, SIGTTOU, &ignact, &oldact);
873#endif
874#ifdef SIGTTIN
875 retry_sigaction(FIL__, __LINE__, SIGTTIN, &ignact, &oldact);
876#endif
877#endif
878
879#ifdef SIGTRAP
880#if !defined(SCREW_IT_UP)
881 retry_sigaction(FIL__, __LINE__, SIGTRAP, &act, &oldact);
882#endif
883#endif
884
885#ifdef SIGPOLL
886 retry_sigaction(FIL__, __LINE__, SIGPOLL, &ignact, &oldact);
887#endif
888#if defined(SIGPROF) && !defined(SH_PROFILE)
889 retry_sigaction(FIL__, __LINE__, SIGPROF, &ignact, &oldact);
890#endif
891#ifdef SIGSYS
892 retry_sigaction(FIL__, __LINE__, SIGSYS, &act, &oldact);
893#endif
894#ifdef SIGURG
895 retry_sigaction(FIL__, __LINE__, SIGURG, &ignact, &oldact);
896#endif
897#if defined(SIGVTALRM) && !defined(SH_PROFILE)
898 retry_sigaction(FIL__, __LINE__, SIGVTALRM, &ignact, &oldact);
899#endif
900#ifdef SIGXCPU
901 retry_sigaction(FIL__, __LINE__, SIGXCPU, &act, &oldact);
902#endif
903#ifdef SIGXFSZ
904 retry_sigaction(FIL__, __LINE__, SIGXFSZ, &act, &oldact);
905#endif
906
907#ifdef SIGEMT
908 retry_sigaction(FIL__, __LINE__, SIGEMT, &ignact, &oldact);
909#endif
910#ifdef SIGSTKFLT
911 retry_sigaction(FIL__, __LINE__, SIGSTKFLT, &act, &oldact);
912#endif
913#ifdef SIGIO
914 retry_sigaction(FIL__, __LINE__, SIGIO, &ignact, &oldact);
915#endif
916#ifdef SIGPWR
917 retry_sigaction(FIL__, __LINE__, SIGPWR, &act, &oldact);
918#endif
919
920#ifdef SIGLOST
921 retry_sigaction(FIL__, __LINE__, SIGLOST, &ignact, &oldact);
922#endif
923#ifdef SIGUNUSED
924 retry_sigaction(FIL__, __LINE__, SIGUNUSED, &ignact, &oldact);
925#endif
926
927 SL_RET0(_("sh_unix_siginstall"));
928}
929
930/* ---------------------------------------------------------------- */
931
932/* checksum the own binary
933 */
934int sh_unix_self_hash (const char * c)
935{
936 char message[512];
937 char hashbuf[KEYBUF_SIZE];
938
939 SL_ENTER(_("sh_unix_self_hash"));
940
941 if (c == NULL)
942 {
943 sh.exec.path[0] = '\0';
944 SL_RETURN((0), _("sh_unix_self_hash"));
945 }
946 sl_strlcpy(sh.exec.path, c, SH_PATHBUF);
947
948 sl_strlcpy(sh.exec.hash,
949 sh_tiger_hash (c, TIGER_FILE, TIGER_NOLIM, hashbuf, sizeof(hashbuf)),
950 KEY_LEN+1);
951 sl_snprintf(message, 512, _("%s has checksum: %s"),
952 sh.exec.path, sh.exec.hash);
953 message[511] = '\0';
954 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
955 message, _("sh_unix_self_hash"));
956 if (0 == sl_strcmp(sh.exec.hash, SH_KEY_NULL ))
957 {
958 dlog(1, FIL__, __LINE__,
959 _("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"),
960 sh.exec.path, sl_get_errmsg(), (int) sl_ret_euid());
961 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_NOACCESS,
962 (long) sh.real.uid, c);
963 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
964 }
965 SL_RETURN((0), _("sh_unix_self_hash"));
966}
967
968int sh_unix_self_check ()
969{
970 char newhash[KEY_LEN+1];
971 char message[512];
972 char hashbuf[KEYBUF_SIZE];
973
974 SL_ENTER(_("sh_unix_self_check"));
975 if (sh.exec.path[0] == '\0')
976 SL_RETURN((0), _("sh_unix_self_check"));
977
978 sl_strlcpy(newhash,
979 sh_tiger_hash (sh.exec.path, TIGER_FILE, TIGER_NOLIM, hashbuf, sizeof(hashbuf)),
980 KEY_LEN+1);
981 if (0 == sl_strncmp(sh.exec.hash, newhash, KEY_LEN))
982 {
983 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
984 _("Checksum ok"), _("sh_unix_self_check"));
985 SL_RETURN((0), _("sh_unix_self_check"));
986 }
987
988 if (0 == sl_strncmp(SH_KEY_NULL, newhash, KEY_LEN))
989 {
990 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
991 _("Could not read samhain executable"), _("sh_unix_self_check"));
992 SL_RETURN((0), _("sh_unix_self_check"));
993 }
994
995 dlog(1, FIL__, __LINE__,
996 _("The checksum of the executable: %s has changed since startup (%s -> %s).\n"),
997 sh.exec.path, sh.exec.hash, newhash);
998
999 sl_snprintf(message, 512,
1000 _("The checksum of %s has changed since startup (%s -> %s)"),
1001 sh.exec.path, sh.exec.hash, newhash);
1002 message[511] = '\0';
1003
1004 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1005 message, _("sh_unix_self_check"));
1006 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_E_AUTH,
1007 sh.exec.path);
1008 SL_RETURN((-1), _("sh_unix_self_check"));
1009}
1010
1011
1012/* ---------------------------------------------------------------- */
1013
1014long sh_group_to_gid (const char * g, int * fail)
1015{
1016 struct group * w;
1017 gid_t gid = 0;
1018 int status = 0;
1019
1020#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1021 struct group grp;
1022 char * buffer;
1023 static size_t gbufsize = SH_GRBUF_SIZE;
1024#endif
1025
1026 *fail = -1;
1027
1028 if (g)
1029 {
1030 size_t i;
1031 size_t len = strlen(g);
1032
1033 *fail = 0;
1034
1035 for (i = 0; i < len; ++i)
1036 {
1037 char c = g[i];
1038
1039 if (!isdigit((int) c))
1040 goto is_a_name;
1041 }
1042 return atol(g);
1043
1044 is_a_name:
1045
1046#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1047
1048 buffer = SH_ALLOC(gbufsize);
1049 status = sh_getgrnam_r(g, &grp, buffer, gbufsize, &w);
1050
1051 if ((status == ERANGE) && (w == NULL))
1052 {
1053 if (S_TRUE == sl_ok_adds( gbufsize, SH_GRBUF_SIZE ))
1054 {
1055 SH_FREE(buffer);
1056 gbufsize += SH_GRBUF_SIZE;
1057 goto is_a_name;
1058 }
1059 }
1060
1061#else
1062
1063 errno = 0;
1064 w = sh_getgrnam(g);
1065 status = errno;
1066
1067#endif
1068
1069 if ((status == ERANGE) && (w == NULL))
1070 {
1071 static int seen = 0;
1072
1073 if (seen == 0)
1074 {
1075 char errbuf[SH_ERRBUF_SIZE];
1076
1077 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
1078 sh_error_message(status, errbuf, sizeof(errbuf)),
1079 _("sh_group_to_gid"), (long) -1, _("line too long in group entry"));
1080 ++seen;
1081 }
1082 *fail = -1;
1083 }
1084 else if (w == NULL)
1085 {
1086 char * tmp = sh_util_strdup(g);
1087 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1088 _("sh_group_to_gid"), tmp);
1089 SH_FREE(tmp);
1090 *fail = -1;
1091 }
1092 else
1093 {
1094 gid = w->gr_gid;
1095 }
1096#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1097 SH_FREE(buffer);
1098#endif
1099 }
1100
1101 return gid;
1102}
1103
1104/* ---------------------------------------------------------------- */
1105
1106
1107/* added Tue Feb 22 10:36:44 NFT 2000 Rainer Wichmann */
1108static int tf_add_trusted_user_int(const char * c)
1109{
1110 struct passwd * w;
1111 int count;
1112 uid_t pwid = (uid_t)-1;
1113
1114#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1115 struct passwd pwd;
1116 char * buffer;
1117#endif
1118
1119 SL_ENTER(_("tf_add_trusted_user_int"));
1120
1121 /* First check for a user name.
1122 */
1123#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1124 buffer = SH_ALLOC(SH_PWBUF_SIZE);
1125 sh_getpwnam_r(c, &pwd, buffer, SH_PWBUF_SIZE, &w);
1126#else
1127 w = sh_getpwnam(c);
1128#endif
1129
1130 if ((w != NULL) && ((pwid = w->pw_uid) > 0))
1131 goto succe;
1132
1133 /* Failed, so check for a numerical value.
1134 */
1135 pwid = strtol(c, (char **)NULL, 10);
1136 if (pwid > 0 && pwid < 65535)
1137 goto succe;
1138
1139 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1140 _("add trusted user"), c);
1141#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1142 SH_FREE(buffer);
1143#endif
1144 SL_RETURN((-1), _("tf_add_trusted_user_int"));
1145
1146 succe:
1147 count = sl_trust_add_user(pwid);
1148#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1149 SH_FREE(buffer);
1150#endif
1151 SL_RETURN((count), _("tf_add_trusted_user_int"));
1152}
1153
1154int tf_add_trusted_user(const char * c)
1155{
1156 int i;
1157 char * q;
1158 char * p = sh_util_strdup (c);
1159#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1160 char * saveptr;
1161#endif
1162
1163 SL_ENTER(_("tf_add_trusted_user"));
1164
1165#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1166 q = strtok_r(p, ", \t", &saveptr);
1167#else
1168 q = strtok(p, ", \t");
1169#endif
1170 if (!q)
1171 {
1172 SH_FREE(p);
1173 SL_RETURN((-1), _("tf_add_trusted_user"));
1174 }
1175 while (q)
1176 {
1177 i = tf_add_trusted_user_int(q);
1178 if (SL_ISERROR(i))
1179 {
1180 SH_FREE(p);
1181 SL_RETURN((i), _("tf_add_trusted_user"));
1182 }
1183#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1184 q = strtok_r(NULL, ", \t", &saveptr);
1185#else
1186 q = strtok(NULL, ", \t");
1187#endif
1188 }
1189 SH_FREE(p);
1190 SL_RETURN((0), _("tf_add_trusted_user"));
1191}
1192
1193extern uid_t sl_trust_baduid(void);
1194extern gid_t sl_trust_badgid(void);
1195
1196#if defined(HOST_IS_CYGWIN) || defined(__cygwin__) || defined(__CYGWIN32__) || defined(__CYGWIN__)
1197int tf_trust_check (const char * file, int mode)
1198{
1199 (void) file;
1200 (void) mode;
1201 return 0;
1202}
1203#else
1204int tf_trust_check (const char * file, int mode)
1205{
1206 char * tmp;
1207 char * tmp2;
1208 char * p;
1209 int status;
1210 int level;
1211 uid_t ff_euid = (uid_t) -1;
1212 uid_t baduid;
1213 gid_t badgid;
1214
1215 SL_ENTER(_("tf_trust_check"));
1216
1217 if (mode == SL_YESPRIV)
1218 sl_get_euid(&ff_euid);
1219 else
1220 sl_get_ruid(&ff_euid);
1221
1222#if defined(SH_WITH_SERVER)
1223 if (0 == sl_ret_euid()) /* privileges not dropped yet */
1224 {
1225#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1226 struct passwd pwd;
1227 char * buffer = SH_ALLOC(SH_PWBUF_SIZE);
1228 struct passwd * tempres;
1229 sh_getpwnam_r(DEFAULT_IDENT, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
1230#else
1231 struct passwd * tempres = sh_getpwnam(DEFAULT_IDENT);
1232#endif
1233
1234 if (!tempres)
1235 {
1236 dlog(1, FIL__, __LINE__,
1237 _("User %s does not exist. Please add the user to your system.\n"),
1238 DEFAULT_IDENT);
1239 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
1240 }
1241 else
1242 {
1243 ff_euid = tempres->pw_uid;
1244 }
1245#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1246 SH_FREE(buffer);
1247#endif
1248 }
1249#endif
1250
1251 status = sl_trustfile_euid(file, ff_euid);
1252
1253 if ( SL_ENONE != status)
1254 {
1255 if (status == SL_ESTAT)
1256 level = SH_ERR_ALL;
1257 else
1258 level = SH_ERR_ERR;
1259
1260 tmp = sh_util_safe_name (file);
1261 p = sh_util_strdup(sl_trust_errfile());
1262 baduid = sl_trust_baduid();
1263 badgid = sl_trust_badgid();
1264
1265 if (p && *p != '\0')
1266 {
1267 tmp2 = sh_util_safe_name (p);
1268 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST2,
1269 sl_error_string(status), tmp, tmp2);
1270 SH_FREE(tmp2);
1271 }
1272 else
1273 {
1274 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST1,
1275 sl_error_string(status), tmp);
1276 }
1277
1278 if (status == SL_EBADUID || status == SL_EBADGID ||
1279 status == SL_EBADOTH || status == SL_ETRUNC ||
1280 status == SL_EINTERNAL )
1281 {
1282 switch (status) {
1283 case SL_EINTERNAL:
1284 dlog(1, FIL__, __LINE__,
1285 _("An internal error occured in the trustfile function.\n"));
1286 break;
1287 case SL_ETRUNC:
1288 dlog(1, FIL__, __LINE__,
1289 _("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"),
1290 tmp);
1291 break;
1292 case SL_EBADOTH:
1293 dlog(1, FIL__, __LINE__,
1294 _("The path element: %s\nin the filename: %s is world writeable.\n"),
1295 (p) ? p : _("(null)"), tmp);
1296 break;
1297 case SL_EBADUID:
1298 dlog(1, FIL__, __LINE__,
1299 _("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"),
1300 (UID_CAST)baduid, (p) ? p : _("(null)"), tmp);
1301 break;
1302 case SL_EBADGID:
1303 dlog(1, FIL__, __LINE__,
1304 _("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"),
1305 (p) ? p : _("(null)"), tmp, (UID_CAST)badgid,
1306 (UID_CAST)baduid);
1307 break;
1308 default:
1309 break;
1310 }
1311 SH_FREE(tmp);
1312 if (p) SH_FREE(p);
1313 SL_RETURN((-1), _("tf_trust_check"));
1314 }
1315 else {
1316 SH_FREE(tmp);
1317 if (p) SH_FREE(p);
1318 }
1319 }
1320
1321 SL_RETURN((0), _("tf_trust_check"));
1322}
1323#endif
1324
1325#ifdef HAVE_INITGROUPS
1326#ifdef HOST_IS_OSF
1327int sh_unix_initgroups ( char * in_user, gid_t in_gid)
1328#else
1329int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1330#endif
1331{
1332 int status = -1;
1333 status = sh_initgroups (in_user, in_gid);
1334 if (status < 0)
1335 {
1336 if (errno == EPERM)
1337 return 0;
1338 if (errno == EINVAL)
1339 return 0;
1340 return -1;
1341 }
1342 return 0;
1343}
1344#else
1345int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1346{
1347 (void) in_user;
1348 (void) in_gid;
1349 return 0;
1350}
1351#endif
1352
1353#ifdef HAVE_INITGROUPS
1354char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len);
1355int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1356{
1357 int status = -1;
1358 char user[SH_MINIBUF];
1359
1360 SL_ENTER(_("sh_unix_initgroups2"));
1361
1362 if (NULL == sh_unix_getUIDname (SH_ERR_ERR, in_pid, user, sizeof(user)))
1363 SL_RETURN((-1), _("sh_unix_initgroups2"));
1364 status = sh_initgroups (user, in_gid);
1365 if (status < 0)
1366 {
1367 if (errno == EPERM)
1368 status = 0;
1369 if (errno == EINVAL)
1370 status = 0;
1371 }
1372 SL_RETURN((status), _("sh_unix_initgroups2"));
1373}
1374#else
1375int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1376{
1377 (void) in_pid;
1378 (void) in_gid;
1379 return 0;
1380}
1381#endif
1382
1383void sh_unix_closeall (int fd, int except, int inchild)
1384{
1385 int fdx = fd;
1386#ifdef _SC_OPEN_MAX
1387 int fdlimit = sysconf (_SC_OPEN_MAX);
1388#else
1389#ifdef OPEN_MAX
1390 int fdlimit = OPEN_MAX;
1391#else
1392 int fdlimit = _POSIX_OPEN_MAX;
1393#endif
1394#endif
1395
1396 SL_ENTER(_("sh_unix_closeall"));
1397
1398 /* can't happen - so fix it :-(
1399 */
1400 if (fdlimit < 0)
1401 fdlimit = 20; /* POSIX lower limit */
1402
1403 if (fdlimit > 65536)
1404 fdlimit = 65536;
1405
1406 if (!inchild)
1407 sl_dropall (fdx, except);
1408 else
1409 sl_dropall_dirty (fdx, except);
1410
1411 /* Close everything from fd (inclusive) up to fdlimit (exclusive).
1412 */
1413 while (fd < fdlimit)
1414 {
1415 if (fd == except)
1416 fd++;
1417 else if (slib_do_trace != 0 && fd == slib_trace_fd)
1418 fd++;
1419 else
1420 sl_close_fd(FIL__, __LINE__, fd++);
1421 }
1422
1423 SL_RET0(_("sh_unix_closeall"));
1424}
1425
1426static void sh_unix_setlimits(void)
1427{
1428 struct rlimit limits;
1429
1430 SL_ENTER(_("sh_unix_setlimits"));
1431
1432 limits.rlim_cur = RLIM_INFINITY;
1433 limits.rlim_max = RLIM_INFINITY;
1434
1435#ifdef RLIMIT_CPU
1436 setrlimit (RLIMIT_CPU, &limits);
1437#endif
1438#ifdef RLIMIT_FSIZE
1439 setrlimit (RLIMIT_FSIZE, &limits);
1440#endif
1441#ifdef RLIMIT_DATA
1442 setrlimit (RLIMIT_DATA, &limits);
1443#endif
1444#ifdef RLIMIT_STACK
1445 setrlimit (RLIMIT_STACK, &limits);
1446#endif
1447#ifdef RLIMIT_RSS
1448 setrlimit (RLIMIT_RSS, &limits);
1449#endif
1450#ifdef RLIMIT_NPROC
1451 setrlimit (RLIMIT_NPROC, &limits);
1452#endif
1453#ifdef RLIMIT_MEMLOCK
1454 setrlimit (RLIMIT_MEMLOCK, &limits);
1455#endif
1456
1457#if !defined(SL_DEBUG)
1458 /* no core dumps
1459 */
1460 limits.rlim_cur = 0;
1461 limits.rlim_max = 0;
1462#ifdef RLIMIT_CORE
1463 setrlimit (RLIMIT_CORE, &limits);
1464#endif
1465#else
1466#ifdef RLIMIT_CORE
1467 setrlimit (RLIMIT_CORE, &limits);
1468#endif
1469#endif
1470
1471 limits.rlim_cur = 1024;
1472 limits.rlim_max = 1024;
1473
1474#if defined(RLIMIT_NOFILE)
1475 setrlimit (RLIMIT_NOFILE, &limits);
1476#elif defined(RLIMIT_OFILE)
1477 setrlimit (RLIMIT_OFILE, &limits);
1478#endif
1479
1480 SL_RET0(_("sh_unix_setlimits"));
1481}
1482
1483static void sh_unix_copyenv(void)
1484{
1485 char ** env0 = environ;
1486 char ** env1;
1487 int envlen = 0;
1488 size_t len;
1489
1490 SL_ENTER(_("sh_unix_copyenv"));
1491
1492 while (env0 != NULL && env0[envlen] != NULL) {
1493 /* printf("%2d: %s\n", envlen, env0[envlen]); */
1494 ++envlen;
1495 }
1496 ++envlen;
1497
1498 /* printf("-> %2d: slots allocated\n", envlen); */
1499 env1 = calloc(1,sizeof(char *) * envlen); /* only once */
1500 if (env1 == NULL)
1501 {
1502 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1503 SL_RET0(_("sh_unix_copyenv"));
1504 }
1505 env0 = environ;
1506 envlen = 0;
1507
1508 while (env0 != NULL && env0[envlen] != NULL) {
1509 len = strlen(env0[envlen]) + 1;
1510 env1[envlen] = calloc(1,len); /* only once */
1511 if (env1[envlen] == NULL)
1512 {
1513 int i;
1514 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1515 for (i = 0; i < envlen; ++i) free(env1[len]);
1516 free(env1);
1517 SL_RET0(_("sh_unix_copyenv"));
1518 }
1519 sl_strlcpy(env1[envlen], env0[envlen], len);
1520 ++envlen;
1521 }
1522 env1[envlen] = NULL;
1523
1524 environ = env1;
1525 SL_RET0(_("sh_unix_copyenv"));
1526}
1527
1528/* delete all environment variables
1529 */
1530static void sh_unix_zeroenv(void)
1531{
1532 char * c;
1533 char ** env;
1534
1535 SL_ENTER(_("sh_unix_zeroenv"));
1536
1537 sh_unix_copyenv();
1538 env = environ;
1539
1540 while (env != NULL && *env != NULL) {
1541 c = strchr ((*env), '=');
1542#ifdef WITH_MYSQL
1543 /*
1544 * Skip the MYSQL_UNIX_PORT environment variable; MySQL may need it.
1545 */
1546 if (0 == sl_strncmp((*env), _("MYSQL_UNIX_PORT="), 16))
1547 {
1548 ++(env);
1549 continue;
1550 }
1551 if (0 == sl_strncmp((*env), _("MYSQL_TCP_PORT="), 15))
1552 {
1553 ++(env);
1554 continue;
1555 }
1556 if (0 == sl_strncmp((*env), _("MYSQL_HOME="), 11))
1557 {
1558 ++(env);
1559 continue;
1560 }
1561#endif
1562#ifdef WITH_ORACLE
1563 /*
1564 * Skip the ORACLE_HOME and TNS_ADMIN environment variables;
1565 * Oracle may need them.
1566 */
1567 if (0 == sl_strncmp((*env), _("ORACLE_HOME="), 12))
1568 {
1569 ++(env);
1570 continue;
1571 }
1572 if (0 == sl_strncmp((*env), _("TNS_ADMIN="), 10))
1573 {
1574 ++(env);
1575 continue;
1576 }
1577#endif
1578 /*
1579 * Skip the TZ environment variable.
1580 */
1581 if (0 == sl_strncmp((*env), _("TZ="), 3))
1582 {
1583 ++(env);
1584 continue;
1585 }
1586 ++(env);
1587 if (c != NULL)
1588 {
1589 ++c;
1590 while ((*c) != '\0') {
1591 (*c) = '\0';
1592 ++c;
1593 }
1594 }
1595 }
1596
1597#ifdef HAVE_TZSET
1598 tzset();
1599#endif
1600
1601 SL_RET0(_("sh_unix_zeroenv"));
1602}
1603
1604
1605static void sh_unix_resettimer(void)
1606{
1607 struct itimerval this_timer;
1608
1609 SL_ENTER(_("sh_unix_resettimer"));
1610
1611 this_timer.it_value.tv_sec = 0;
1612 this_timer.it_value.tv_usec = 0;
1613
1614 this_timer.it_interval.tv_sec = 0;
1615 this_timer.it_interval.tv_usec = 0;
1616
1617 setitimer(ITIMER_REAL, &this_timer, NULL);
1618#if !defined(SH_PROFILE)
1619 setitimer(ITIMER_VIRTUAL, &this_timer, NULL);
1620 setitimer(ITIMER_PROF, &this_timer, NULL);
1621#endif
1622
1623 SL_RET0(_("sh_unix_resettimer"));
1624}
1625
1626static void sh_unix_resetsignals(void)
1627{
1628 int sig_num;
1629#ifdef NSIG
1630 int max_sig = NSIG;
1631#else
1632 int max_sig = 255;
1633#endif
1634 int test;
1635 int status;
1636 struct sigaction act;
1637#if !defined(SH_PROFILE)
1638 struct sigaction oldact;
1639#endif
1640
1641 sigset_t set_proc;
1642
1643 SL_ENTER(_("sh_unix_resetsignals"));
1644 /*
1645 * Reset the current signal mask (inherited from parent process).
1646 */
1647
1648 sigfillset(&set_proc);
1649
1650 do {
1651 errno = 0;
1652 test = SH_SETSIGMASK(SIG_UNBLOCK, &set_proc, NULL);
1653 } while (test < 0 && errno == EINTR);
1654
1655 /*
1656 * Reset signal handling.
1657 */
1658
1659 act.sa_handler = SIG_DFL; /* signal action */
1660 sigemptyset( &act.sa_mask ); /* set an empty mask */
1661 act.sa_flags = 0; /* init sa_flags */
1662
1663 for (sig_num = 1; sig_num <= max_sig; ++sig_num)
1664 {
1665#if !defined(SH_PROFILE)
1666 test = retry_sigaction(FIL__, __LINE__, sig_num, &act, &oldact);
1667#else
1668 test = 0;
1669#endif
1670 if ((test == -1) && (errno != EINVAL))
1671 {
1672 char errbuf[SH_ERRBUF_SIZE];
1673 status = errno;
1674 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_SIG,
1675 sh_error_message (status, errbuf, sizeof(errbuf)), sig_num);
1676 }
1677 }
1678
1679 SL_RET0(_("sh_unix_resetsignals"));
1680}
1681
1682/* Get the local hostname (FQDN)
1683 */
1684static char * sh_tolower (char * s)
1685{
1686 char * ret = s;
1687 if (s)
1688 {
1689 for (; *s; ++s)
1690 {
1691 *s = tolower((unsigned char) *s);
1692 }
1693 }
1694 return ret;
1695}
1696
1697
1698#include <sys/socket.h>
1699
1700/* Required for BSD
1701 */
1702#ifdef HAVE_NETINET_IN_H
1703#include <netinet/in.h>
1704#endif
1705
1706#include <arpa/inet.h>
1707
1708const char * sh_unix_h_name (struct hostent * host_entry)
1709{
1710 char ** p;
1711 if (strchr(host_entry->h_name, '.')) {
1712 return host_entry->h_name;
1713 } else {
1714 for (p = host_entry->h_aliases; *p; ++p) {
1715 if (strchr(*p, '.'))
1716 return *p;
1717 }
1718 }
1719 return host_entry->h_name;
1720}
1721
1722/* uname() on FreeBSD is broken, because the 'nodename' buf is too small
1723 * to hold a valid (leftmost) domain label.
1724 */
1725#if defined(HAVE_UNAME) && !defined(HOST_IS_FREEBSD)
1726#include <sys/utsname.h>
1727void sh_unix_localhost()
1728{
1729 struct utsname buf;
1730 int i;
1731 unsigned int ddot;
1732 int len;
1733 char * p;
1734 char hostname[256];
1735 char numeric[SH_IP_BUF];
1736 char * canonical;
1737
1738
1739 SL_ENTER(_("sh_unix_localhost"));
1740
1741 (void) uname (&buf);
1742 /* flawfinder: ignore */ /* ff bug, ff sees system() */
1743 sl_strlcpy (sh.host.system, buf.sysname, SH_MINIBUF);
1744 sl_strlcpy (sh.host.release, buf.release, SH_MINIBUF);
1745 sl_strlcpy (sh.host.machine, buf.machine, SH_MINIBUF);
1746
1747 /* Workaround for cases where nodename could be
1748 * a truncated FQDN.
1749 */
1750 if (strlen(buf.nodename) == (sizeof(buf.nodename)-1))
1751 {
1752 p = strchr(buf.nodename, '.');
1753 if (NULL != p) {
1754 *p = '\0';
1755 sl_strlcpy(hostname, buf.nodename, 256);
1756 } else {
1757#ifdef HAVE_GETHOSTNAME
1758 if (0 != gethostname(hostname, 256))
1759 {
1760 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1761 _("nodename returned by uname may be truncated"),
1762 _("sh_unix_localhost"));
1763 sl_strlcpy (hostname, buf.nodename, 256);
1764 }
1765 else
1766 {
1767 hostname[255] = '\0';
1768 }
1769#else
1770 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1771 _("nodename returned by uname may be truncated"),
1772 _("sh_unix_localhost"));
1773 sl_strlcpy(hostname, buf.nodename, 256);
1774#endif
1775 }
1776 }
1777 else
1778 {
1779 sl_strlcpy(hostname, buf.nodename, 256);
1780 }
1781
1782 canonical = sh_ipvx_canonical(hostname, numeric, sizeof(numeric));
1783
1784 if (canonical == NULL)
1785 {
1786 sl_strlcpy (sh.host.name, hostname, SH_PATHBUF);
1787 sh_tolower (sh.host.name);
1788 }
1789 else
1790 {
1791 sl_strlcpy (sh.host.name, canonical, SH_PATHBUF);
1792 SH_FREE(canonical);
1793 }
1794
1795 /* check whether it looks like a FQDN
1796 */
1797 len = sl_strlen(sh.host.name);
1798 ddot = 0;
1799 for (i = 0; i < len; ++i)
1800 if (sh.host.name[i] == '.') ++ddot;
1801
1802 if (ddot == 0)
1803 {
1804 dlog(1, FIL__, __LINE__,
1805 _("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"),
1806 hostname, sh.host.name);
1807 sl_strlcpy (sh.host.name, numeric, SH_PATHBUF);
1808 SL_RET0(_("sh_unix_localhost"));
1809 }
1810
1811 if (sh_ipvx_is_numeric(sh.host.name))
1812 {
1813 dlog(1, FIL__, __LINE__,
1814 _("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"),
1815 hostname, sh.host.name);
1816 }
1817
1818 SL_RET0(_("sh_unix_localhost"));
1819}
1820
1821#else
1822
1823/*
1824 * --FreeBSD code
1825 */
1826#if defined(HAVE_UNAME)
1827#include <sys/utsname.h>
1828#endif
1829void sh_unix_localhost()
1830{
1831#if defined(HAVE_UNAME)
1832 struct utsname buf;
1833#endif
1834 int i;
1835 int ddot;
1836 int len;
1837 char hostname[1024];
1838 char numeric[SH_IP_BUF];
1839 char * canonical;
1840
1841 SL_ENTER(_("sh_unix_localhost"));
1842
1843#if defined(HAVE_UNAME)
1844 (void) uname (&buf);
1845 /* flawfinder: ignore */ /* ff bug, ff sees system() */
1846 sl_strlcpy (sh.host.system, buf.sysname, SH_MINIBUF);
1847 sl_strlcpy (sh.host.release, buf.release, SH_MINIBUF);
1848 sl_strlcpy (sh.host.machine, buf.machine, SH_MINIBUF);
1849#endif
1850
1851 (void) gethostname (hostname, 1024);
1852 hostname[1023] = '\0';
1853
1854 canonical = sh_ipvx_canonical(hostname, numeric, sizeof(numeric));
1855
1856 if (canonical == NULL)
1857 {
1858 sl_strlcpy (sh.host.name, hostname, SH_PATHBUF);
1859 sh_tolower (sh.host.name);
1860 }
1861 else
1862 {
1863 sl_strlcpy (sh.host.name, canonical, SH_PATHBUF);
1864 SH_FREE(canonical);
1865 }
1866
1867 /* check whether it looks like a FQDN
1868 */
1869 len = sl_strlen(sh.host.name);
1870 ddot = 0;
1871 for (i = 0; i < len; ++i)
1872 if (sh.host.name[i] == '.') ++ddot;
1873 if (ddot == 0)
1874 {
1875 dlog(1, FIL__, __LINE__,
1876 _("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"),
1877 hostname, sh.host.name);
1878 sl_strlcpy (sh.host.name, numeric, SH_PATHBUF);
1879 SL_RET0(_("sh_unix_localhost"));
1880 }
1881
1882 if (sh_ipvx_is_numeric(sh.host.name))
1883 {
1884 dlog(1, FIL__, __LINE__,
1885 _("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"),
1886 hostname, sh.host.name);
1887 }
1888
1889 SL_RET0(_("sh_unix_localhost"));
1890}
1891#endif
1892
1893
1894void sh_unix_memlock()
1895{
1896 SL_ENTER(_("sh_unix_memlock"));
1897
1898 /* do this before dropping privileges
1899 */
1900#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
1901 if (skey->mlock_failed == S_FALSE)
1902 {
1903 if ( (-1) == sh_unix_mlock( FIL__, __LINE__,
1904 (char *) skey, sizeof (sh_key_t)) )
1905 {
1906 SH_MUTEX_LOCK_UNSAFE(mutex_skey);
1907 skey->mlock_failed = S_TRUE;
1908 SH_MUTEX_UNLOCK_UNSAFE(mutex_skey);
1909 }
1910 }
1911#else
1912 if (skey->mlock_failed == S_FALSE)
1913 {
1914 SH_MUTEX_LOCK_UNSAFE(mutex_skey);
1915 skey->mlock_failed = S_TRUE;
1916 SH_MUTEX_UNLOCK_UNSAFE(mutex_skey);
1917 }
1918#endif
1919
1920 SL_RET0(_("sh_unix_memlock"));
1921}
1922
1923#ifdef SH_WITH_SERVER
1924char * chroot_dir = NULL;
1925
1926int sh_unix_set_chroot(const char * str)
1927{
1928 size_t len;
1929 static int block = 0;
1930
1931 if (block == 1)
1932 return 0;
1933
1934 if (str && *str == '/')
1935 {
1936 len = strlen(str) + 1;
1937 chroot_dir = calloc(1,strlen(str) + 1); /* only once */
1938 if (!chroot_dir)
1939 {
1940 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1941 return 1;
1942 }
1943 sl_strlcpy(chroot_dir, str, len);
1944 block = 1;
1945 return 0;
1946 }
1947 return 1;
1948}
1949
1950int sh_unix_chroot(void)
1951{
1952 int status;
1953
1954 if (chroot_dir != NULL)
1955 {
1956 status = retry_aud_chdir(FIL__, __LINE__, chroot_dir);
1957 if ( (-1) == status )
1958 {
1959 char errbuf[SH_ERRBUF_SIZE];
1960 status = errno;
1961 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
1962 sh_error_message (status, errbuf, sizeof(errbuf)), chroot_dir);
1963 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1964 }
1965 /* flawfinder: ignore */
1966 return (chroot(chroot_dir));
1967 }
1968 return 0;
1969}
1970/* #ifdef SH_WITH_SERVER */
1971#else
1972int sh_unix_chroot(void) { return 0; }
1973#endif
1974
1975/* daemon mode
1976 */
1977static int block_setdeamon = 0;
1978
1979int sh_unix_setdeamon(const char * dummy)
1980{
1981 int res = 0;
1982
1983 SL_ENTER(_("sh_unix_setdeamon"));
1984
1985 if (block_setdeamon != 0)
1986 SL_RETURN((0),_("sh_unix_setdeamon"));
1987
1988 if (dummy == NULL)
1989 sh.flag.isdaemon = S_TRUE;
1990 else
1991 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
1992
1993 if (sh.flag.opts == S_TRUE)
1994 block_setdeamon = 1;
1995
1996 SL_RETURN(res, _("sh_unix_setdeamon"));
1997}
1998#if defined(HAVE_LIBPRELUDE)
1999#include "sh_prelude.h"
2000#endif
2001
2002int sh_unix_setnodeamon(const char * dummy)
2003{
2004 int res = 0;
2005
2006 SL_ENTER(_("sh_unix_setnodeamon"));
2007
2008 if (block_setdeamon != 0)
2009 SL_RETURN((0),_("sh_unix_setmodeamon"));
2010
2011 if (dummy == NULL)
2012 sh.flag.isdaemon = S_FALSE;
2013 else
2014 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
2015
2016 if (sh.flag.opts == S_TRUE)
2017 block_setdeamon = 1;
2018
2019 SL_RETURN(res, _("sh_unix_setnodeamon"));
2020}
2021
2022int sh_unix_init(int goDaemon)
2023{
2024 int status;
2025 uid_t uid;
2026 pid_t oldpid = getpid();
2027#if defined(SH_WITH_SERVER)
2028 extern int sh_socket_open_int (void);
2029#endif
2030 char errbuf[SH_ERRBUF_SIZE];
2031
2032 extern void sh_kill_sub();
2033
2034 SL_ENTER(_("sh_unix_init"));
2035
2036 /* fork twice, exit the parent process
2037 */
2038 if (goDaemon == 1) {
2039
2040 switch (aud_fork(FIL__, __LINE__)) {
2041 case 0: break; /* child process continues */
2042 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
2043 default: /* parent process exits */
2044 sh_kill_sub();
2045 aud__exit(FIL__, __LINE__, 0);
2046 }
2047
2048 /* Child processes do not inherit page locks across a fork.
2049 * Error in next fork would return in this (?) thread of execution.
2050 */
2051 sh_unix_memlock();
2052
2053 setsid(); /* should not fail */
2054 sh.pid = (UINT64) getpid();
2055
2056 switch (aud_fork(FIL__, __LINE__)) {
2057 case 0: break; /* child process continues */
2058 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
2059 default: /* parent process exits */
2060 sh_kill_sub();
2061 aud__exit(FIL__, __LINE__, 0);
2062 }
2063
2064 /* Child processes do not inherit page locks across a fork.
2065 */
2066 sh_unix_memlock();
2067 sh.pid = (UINT64) getpid();
2068
2069 } else {
2070 setsid(); /* should not fail */
2071 }
2072
2073 /* set working directory
2074 */
2075#ifdef SH_PROFILE
2076 status = 0;
2077#else
2078 status = retry_aud_chdir(FIL__, __LINE__, "/");
2079#endif
2080 if ( (-1) == status )
2081 {
2082 status = errno;
2083 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
2084 sh_error_message (status, errbuf, sizeof(errbuf)), "/");
2085 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2086 }
2087
2088 /* reset timers
2089 */
2090 sh_unix_resettimer();
2091
2092 /* signal handlers
2093 */
2094 sh_unix_resetsignals();
2095#if defined(SCREW_IT_UP)
2096 sh_sigtrap_prepare();
2097#endif
2098 sh_unix_siginstall (goDaemon);
2099
2100 /* set file creation mask
2101 */
2102 (void) umask (0); /* should not fail */
2103
2104 /* set resource limits to maximum, and
2105 * core dump size to zero
2106 */
2107 sh_unix_setlimits();
2108
2109 /* zero out the environment (like PATH='\0')
2110 */
2111 sh_unix_zeroenv();
2112
2113 if (goDaemon == 1)
2114 {
2115 /* Close first tree file descriptors
2116 */
2117 sl_close_fd (FIL__, __LINE__, 0); /* if running as daemon */
2118 sl_close_fd (FIL__, __LINE__, 1); /* if running as daemon */
2119 sl_close_fd (FIL__, __LINE__, 2); /* if running as daemon */
2120
2121 /* Enable full error logging
2122 */
2123 sh_error_only_stderr (S_FALSE);
2124
2125 /* open first three streams to /dev/null
2126 */
2127 status = aud_open(FIL__, __LINE__, SL_NOPRIV, _("/dev/null"), O_RDWR, 0);
2128 if (status < 0)
2129 {
2130 status = errno;
2131 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2132 sh_error_message(status, errbuf, sizeof(errbuf)), _("open"));
2133 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2134 }
2135
2136 status = retry_aud_dup(FIL__, __LINE__, 0);
2137 if (status >= 0)
2138 retry_aud_dup(FIL__, __LINE__, 0);
2139
2140 if (status < 0)
2141 {
2142 status = errno;
2143 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2144 sh_error_message(status, errbuf, sizeof(errbuf)), _("dup"));
2145 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2146 }
2147
2148 sh_error_enable_unsafe (S_TRUE);
2149#if defined(HAVE_LIBPRELUDE)
2150 sh_prelude_reset ();
2151#endif
2152
2153 /* --- wait until parent has exited ---
2154 */
2155 while (1 == 1)
2156 {
2157 errno = 0;
2158 if (0 > aud_kill (FIL__, __LINE__, oldpid, 0) && errno == ESRCH)
2159 {
2160 break;
2161 }
2162 retry_msleep(0, 1);
2163 }
2164
2165 /* write PID file
2166 */
2167 status = sh_unix_write_pid_file();
2168 if (status < 0)
2169 {
2170 sl_get_euid(&uid);
2171 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_PIDFILE,
2172 (long) uid, sh.srvlog.alt);
2173 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2174 }
2175#if defined(SH_WITH_SERVER)
2176 sh_socket_open_int ();
2177#endif
2178 }
2179 else
2180 {
2181 sh_error_enable_unsafe (S_TRUE);
2182#if defined(HAVE_LIBPRELUDE)
2183 sh_prelude_reset ();
2184#endif
2185#if defined(SH_WITH_SERVER)
2186 sh_socket_open_int ();
2187#endif
2188 }
2189
2190 /* chroot (this is a no-op if no chroot dir is specified
2191 */
2192 status = sh_unix_chroot();
2193 if (status < 0)
2194 {
2195 status = errno;
2196 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2197 sh_error_message(status, errbuf, sizeof(errbuf)), _("chroot"));
2198 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2199 }
2200
2201 /* drop capabilities
2202 */
2203 sl_drop_cap();
2204
2205 SL_RETURN((0),_("sh_unix_init"));
2206}
2207
2208/* --- run a command, securely --- */
2209
2210int sh_unix_run_command (const char * str)
2211{
2212 pid_t pid;
2213 char * arg[4];
2214 char * env[5];
2215 char * path = sh_util_strdup(_("/bin/sh"));
2216
2217 int status = -1;
2218
2219 arg[0] = sh_util_strdup(_("/bin/sh"));
2220 arg[1] = sh_util_strdup(_("-c"));
2221 arg[2] = sh_util_strdup(str);
2222 arg[3] = NULL;
2223
2224 env[0] = sh_util_strdup(_("PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/ucb"));
2225 env[1] = sh_util_strdup(_("SHELL=/bin/sh"));
2226 env[2] = sh_util_strdup(_("IFS= \t\n"));
2227 if (getenv("TZ")) { /* flawfinder: ignore */
2228 char * tz = sh_util_strdup(getenv("TZ")); /* flawfinder: ignore */
2229 size_t tzlen = strlen(tz);
2230 if (S_TRUE == sl_ok_adds (4, tzlen)) {
2231 env[3] = SH_ALLOC(4+tzlen);
2232 sl_strlcpy(env[3], "TZ=", 4);
2233 sl_strlcat(env[3], tz , 4+tzlen);
2234 } else {
2235 env[3] = NULL;
2236 }
2237 } else {
2238 env[3] = NULL;
2239 }
2240 env[4] = NULL;
2241
2242 pid = fork();
2243
2244 if (pid == (pid_t)(-1))
2245 {
2246 return -1;
2247 }
2248
2249 else if (pid == 0) /* child */
2250 {
2251 memset(skey, 0, sizeof(sh_key_t));
2252 (void) umask(S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
2253 sh_unix_closeall (3, -1, S_TRUE); /* in child process */
2254 execve(path, arg, env);
2255 _exit(EXIT_FAILURE);
2256 }
2257
2258 else /* parent */
2259 {
2260 int r;
2261
2262 while((r = waitpid(pid, &status, WUNTRACED)) != pid && r != -1) ;
2263
2264#if !defined(USE_UNO)
2265 if (r == -1 || !WIFEXITED(status))
2266 {
2267 status = -1;
2268 }
2269 else
2270 {
2271 status = WEXITSTATUS(status);
2272 }
2273#endif
2274 }
2275
2276 return status;
2277}
2278
2279/********************************************************
2280 *
2281 * TIME
2282 *
2283 ********************************************************/
2284
2285/* Figure out the time offset of the current timezone
2286 * in a portable way.
2287 */
2288char * t_zone(const time_t * xx)
2289{
2290 struct tm aa;
2291 struct tm bb;
2292
2293 struct tm * aptr;
2294 struct tm * bptr;
2295
2296 int sign = 0;
2297 int diff = 0;
2298 int hh, mm;
2299 static char tz[64];
2300
2301 SL_ENTER(_("t_zone"));
2302
2303#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2304 aptr = gmtime_r (xx, &aa);
2305#else
2306 aptr = gmtime(xx);
2307 if (aptr)
2308 memcpy (&aa, aptr, sizeof(struct tm));
2309#endif
2310
2311#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2312 bptr = localtime_r (xx, &bb);
2313#else
2314 bptr = localtime(xx);
2315 if (bptr)
2316 memcpy (&bb, bptr, sizeof(struct tm));
2317#endif
2318
2319 if (bptr && aptr)
2320 {
2321 /* Check for datum wrap-around.
2322 */
2323 if ((aa.tm_mday == 1) && (aa.tm_mday < bb.tm_mday) && (aa.tm_hour < bb.tm_hour))
2324 sign = ( 1);
2325 else if (aa.tm_year < bb.tm_year)
2326 sign = (-1);
2327 else if (aa.tm_mon < bb.tm_mon)
2328 sign = (-1);
2329 else if (aa.tm_mday < bb.tm_mday)
2330 sign = (-1);
2331 else if (bb.tm_year < aa.tm_year)
2332 sign = ( 1);
2333 else if (bb.tm_mon < aa.tm_mon)
2334 sign = ( 1);
2335 else if (bb.tm_mday < aa.tm_mday)
2336 sign = ( 1);
2337
2338 diff = aa.tm_hour * 60 + aa.tm_min;
2339 diff = (bb.tm_hour * 60 + bb.tm_min) - diff;
2340 diff = diff - (sign * 24 * 60); /* datum wrap-around correction */
2341 hh = diff / 60;
2342 mm = diff - (hh * 60);
2343 sl_snprintf (tz, sizeof(tz), _("%+03d%02d"), hh, mm); /* known to fit */
2344 }
2345 else
2346 {
2347 sl_snprintf (tz, sizeof(tz), _("%+03d%02d"), 0, 0);
2348 }
2349 SL_RETURN(tz, _("t_zone"));
2350}
2351
2352unsigned long sh_unix_longtime ()
2353{
2354 return ((unsigned long)time(NULL));
2355}
2356
2357#ifdef HAVE_GETTIMEOFDAY
2358unsigned long sh_unix_notime ()
2359{
2360 struct timeval tv;
2361
2362 gettimeofday (&tv, NULL);
2363
2364 return ((unsigned long)(tv.tv_sec + tv.tv_usec * 10835 + getpid() + getppid()));
2365
2366}
2367#endif
2368
2369static int count_dev_time = 0;
2370
2371void reset_count_dev_time(void)
2372{
2373 count_dev_time = 0;
2374 return;
2375}
2376
2377int sh_unix_settimeserver (const char * address)
2378{
2379
2380 SL_ENTER(_("sh_unix_settimeserver"));
2381
2382 if (address != NULL && count_dev_time < 2
2383 && sl_strlen(address) < SH_PATHBUF)
2384 {
2385 if (count_dev_time == 0)
2386 sl_strlcpy (sh.srvtime.name, address, SH_PATHBUF);
2387 else
2388 sl_strlcpy (sh.srvtime.alt, address, SH_PATHBUF);
2389
2390 ++count_dev_time;
2391 SL_RETURN((0), _("sh_unix_settimeserver"));
2392 }
2393 SL_RETURN((-1), _("sh_unix_settimeserver"));
2394}
2395
2396
2397#ifdef HAVE_NTIME
2398#define UNIXEPOCH 2208988800UL /* difference between Unix time and net time
2399 * The UNIX EPOCH starts in 1970.
2400 */
2401#include <sys/socket.h>
2402#include <netinet/in.h>
2403#include <arpa/inet.h>
2404#include <netdb.h>
2405#include <ctype.h>
2406#endif
2407
2408/* Timeserver service. */
2409/* define is missing on HP-UX 10.20 */
2410#ifndef IPPORT_TIMESERVER
2411#define IPPORT_TIMESERVER 37
2412#endif
2413
2414char * sh_unix_time (time_t thetime, char * buffer, size_t len)
2415{
2416
2417 int status;
2418 char AsciiTime[81]; /* local time */
2419 time_t time_now;
2420 struct tm * time_ptr;
2421#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2422 struct tm time_tm;
2423#endif
2424#ifdef SH_USE_XML
2425 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2426#else
2427 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2428#endif
2429
2430#ifdef HAVE_NTIME
2431 int fd; /* network file descriptor */
2432 u_char net_time[4]; /* remote time in network format */
2433 static int failerr = 0; /* no net time */
2434 int fail = 0; /* no net time */
2435 int errflag;
2436 char errmsg[256];
2437 char error_call[SH_MINIBUF];
2438 int error_num;
2439#endif
2440
2441 SL_ENTER(_("sh_unix_time"));
2442
2443#ifdef HAVE_NTIME
2444 if (thetime == 0)
2445 {
2446 if (sh.srvtime.name[0] == '\0')
2447 {
2448 fail = 1;
2449 (void) time (&time_now);
2450 }
2451 else /* have a timeserver address */
2452 {
2453 /* don't call timeserver more than once per second */
2454 static time_t time_old = 0;
2455 time_t time_new;
2456 static time_t time_saved = 0;
2457 (void) time (&time_new);
2458 if ((time_new == time_old) && (time_saved != 0))
2459 {
2460 time_now = time_saved;
2461 goto end;
2462 }
2463 time_old = time_new;
2464
2465
2466 fd = connect_port_2 (sh.srvtime.name, sh.srvtime.alt,
2467 IPPORT_TIMESERVER,
2468 error_call, &error_num, errmsg, sizeof(errmsg));
2469 if (fd >= 0)
2470 {
2471 if (4 != read_port (fd, (char *) net_time, 4, &errflag, 2))
2472 {
2473 fail = 1;
2474 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2475 MSG_E_NLOST,
2476 _("time"), sh.srvtime.name);
2477 }
2478 sl_close_fd(FIL__, __LINE__, fd);
2479 }
2480 else
2481 {
2482 sh_error_handle ((-1), FIL__, __LINE__, error_num,
2483 MSG_E_NET, errmsg, error_call,
2484 _("time"), sh.srvtime.name);
2485 errflag = error_num;
2486 fail = 1;
2487 }
2488
2489 if (fail == 0)
2490 {
2491 unsigned long ltmp;
2492 UINT32 ttmp;
2493 memcpy(&ttmp, net_time, sizeof(UINT32)); ltmp = ttmp;
2494 time_now = ntohl(ltmp) - UNIXEPOCH;
2495 time_saved = time_now;
2496
2497 if (failerr == 1) {
2498 failerr = 0;
2499 sh_error_handle ((-1), FIL__, __LINE__, 0,
2500 MSG_E_NEST,
2501 _("time"), sh.srvtime.name);
2502 }
2503 }
2504 else
2505 {
2506 (void) time (&time_now);
2507 time_saved = 0;
2508
2509 if (failerr == 0)
2510 {
2511 failerr = 1;
2512 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2513 MSG_SRV_FAIL,
2514 _("time"), sh.srvtime.name);
2515 }
2516 }
2517 end:
2518 ; /* 'label at end of compound statement' */
2519 }
2520 }
2521 else
2522 {
2523 time_now = thetime;
2524 }
2525
2526 /* #ifdef HAVE_NTIME */
2527#else
2528
2529 if (thetime == 0)
2530 {
2531 (void) time (&time_now);
2532 }
2533 else
2534 {
2535 time_now = thetime;
2536 }
2537
2538 /* #ifdef HAVE_NTIME */
2539#endif
2540
2541 if (time_now == (-1) )
2542 {
2543 sl_strlcpy(buffer, _(deftime), len);
2544 SL_RETURN(buffer, _("sh_unix_time"));
2545 }
2546 else
2547 {
2548#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2549 time_ptr = localtime_r (&time_now, &time_tm);
2550#else
2551 time_ptr = localtime (&time_now);
2552#endif
2553 }
2554 if (time_ptr != NULL)
2555 {
2556 status = strftime (AsciiTime, sizeof(AsciiTime),
2557#ifdef SH_USE_XML
2558 _("%Y-%m-%dT%H:%M:%S%%s"),
2559#else
2560 _("[%Y-%m-%dT%H:%M:%S%%s]"),
2561#endif
2562 time_ptr);
2563
2564 sl_snprintf(buffer, len, AsciiTime, t_zone(&time_now));
2565
2566 if ( (status == 0) || (status == sizeof(AsciiTime)) )
2567 {
2568 sl_strlcpy(buffer, _(deftime), len);
2569 SL_RETURN( buffer, _("sh_unix_time"));
2570 }
2571 else
2572 {
2573 SL_RETURN(buffer, _("sh_unix_time"));
2574 }
2575 }
2576
2577 /* last resort
2578 */
2579 sl_strlcpy(buffer, _(deftime), len);
2580 SL_RETURN( buffer, _("sh_unix_time"));
2581}
2582
2583static int sh_unix_use_localtime = S_FALSE;
2584
2585/* whether to use localtime for file timestamps in logs
2586 */
2587int sh_unix_uselocaltime (const char * c)
2588{
2589 int i;
2590 SL_ENTER(_("sh_unix_uselocaltime"));
2591 i = sh_util_flagval(c, &(sh_unix_use_localtime));
2592
2593 SL_RETURN(i, _("sh_unix_uselocaltime"));
2594}
2595
2596char * sh_unix_gmttime (time_t thetime, char * buffer, size_t len)
2597{
2598
2599 int status;
2600
2601 struct tm * time_ptr;
2602#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS)
2603 struct tm time_tm;
2604#endif
2605 char AsciiTime[81]; /* GMT time */
2606#ifdef SH_USE_XML
2607 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2608#else
2609 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2610#endif
2611
2612 SL_ENTER(_("sh_unix_gmttime"));
2613
2614 if (sh_unix_use_localtime == S_FALSE)
2615 {
2616#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2617 time_ptr = gmtime_r (&thetime, &time_tm);
2618#else
2619 time_ptr = gmtime (&thetime);
2620#endif
2621 }
2622 else
2623 {
2624#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2625 time_ptr = localtime_r (&thetime, &time_tm);
2626#else
2627 time_ptr = localtime (&thetime);
2628#endif
2629 }
2630 if (time_ptr != NULL)
2631 {
2632 status = strftime (AsciiTime, 80,
2633#ifdef SH_USE_XML
2634 _("%Y-%m-%dT%H:%M:%S"),
2635#else
2636 _("[%Y-%m-%dT%H:%M:%S]"),
2637#endif
2638 time_ptr);
2639
2640 if ( (status == 0) || (status == 80) )
2641 sl_strlcpy(buffer, _(deftime), len);
2642 else
2643 sl_strlcpy(buffer, AsciiTime, len);
2644 SL_RETURN( buffer, _("sh_unix_gmttime"));
2645 }
2646
2647 /* last resort
2648 */
2649 sl_strlcpy(buffer, _(deftime), len);
2650 SL_RETURN( buffer, _("sh_unix_gmttime"));
2651}
2652
2653
2654char * sh_unix_getUIDdir (int level, uid_t uid, char * out, size_t len)
2655{
2656 struct passwd * tempres;
2657 int status = 0;
2658
2659#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2660 struct passwd pwd;
2661 char * buffer;
2662#endif
2663 char errbuf[SH_ERRBUF_SIZE];
2664
2665 SL_ENTER(_("sh_unix_getUIDdir"));
2666
2667#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2668 buffer = SH_ALLOC(SH_PWBUF_SIZE);
2669 sh_getpwuid_r(uid, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
2670#else
2671 errno = 0;
2672 tempres = sh_getpwuid(uid);
2673 status = errno;
2674#endif
2675
2676 if (tempres == NULL) {
2677 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2678 sh_error_message(status, errbuf, sizeof(errbuf)),
2679 _("getpwuid"), (long) uid, _("completely missing"));
2680#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2681 SH_FREE(buffer);
2682#endif
2683 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2684 }
2685
2686 if (tempres->pw_dir != NULL) {
2687 sl_strlcpy(out, tempres->pw_dir, len);
2688#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2689 SH_FREE(buffer);
2690#endif
2691 SL_RETURN( out, _("sh_unix_getUIDdir"));
2692 } else {
2693 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2694 sh_error_message(status, errbuf, sizeof(errbuf)),
2695 _("getpwuid"), (long) uid, _("pw_dir"));
2696#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2697 SH_FREE(buffer);
2698#endif
2699 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2700 }
2701}
2702
2703/* ------------------- Caching ----------------*/
2704#include "zAVLTree.h"
2705
2706#define CACHE_GID 0
2707#define CACHE_UID 1
2708
2709struct user_id {
2710 char * name;
2711 uid_t id;
2712 struct user_id * next;
2713};
2714
2715static struct user_id * uid_list = NULL;
2716static struct user_id * gid_list = NULL;
2717
2718SH_MUTEX_STATIC(mutex_cache, PTHREAD_MUTEX_INITIALIZER);
2719
2720static void sh_userid_free(struct user_id * item)
2721{
2722 while (item)
2723 {
2724 struct user_id * user = item;
2725 item = item->next;
2726
2727 SH_FREE(user->name);
2728 SH_FREE(user);
2729 }
2730 return;
2731}
2732
2733void sh_userid_destroy ()
2734{
2735 struct user_id * tmp_uid;
2736 struct user_id * tmp_gid;
2737
2738 SH_MUTEX_LOCK_UNSAFE(mutex_cache);
2739 tmp_gid = gid_list;
2740 gid_list = NULL;
2741 tmp_uid = uid_list;
2742 uid_list = NULL;
2743 SH_MUTEX_UNLOCK_UNSAFE(mutex_cache);
2744
2745 sh_userid_free(tmp_uid);
2746 sh_userid_free(tmp_gid);
2747 return;
2748}
2749
2750static void sh_userid_additem(struct user_id * list, struct user_id * item)
2751{
2752 if (list)
2753 {
2754 while (list && list->next)
2755 list = list->next;
2756 list->next = item;
2757 }
2758 return;
2759}
2760
2761static void sh_userid_add(uid_t id, char * username, int which)
2762{
2763 size_t len;
2764 struct user_id * user = SH_ALLOC(sizeof(struct user_id));
2765
2766 if (username)
2767 len = strlen(username) + 1;
2768 else
2769 len = 1;
2770
2771 user->name = SH_ALLOC(len);
2772 user->id = id;
2773 if (username)
2774 sl_strlcpy(user->name, username, len);
2775 else
2776 user->name[0] = '\0';
2777 user->next = NULL;
2778
2779 SH_MUTEX_LOCK(mutex_cache);
2780 if (which == CACHE_UID)
2781 {
2782 if (!uid_list)
2783 uid_list = user;
2784 else
2785 sh_userid_additem(uid_list, user);
2786 }
2787 else
2788 {
2789 if (!gid_list)
2790 gid_list = user;
2791 else
2792 sh_userid_additem(gid_list, user);
2793 }
2794 SH_MUTEX_UNLOCK(mutex_cache);
2795
2796 return;
2797}
2798
2799static char * sh_userid_search(struct user_id * list, uid_t id)
2800{
2801 while (list)
2802 {
2803 if (list->id == id)
2804 return list->name;
2805 list = list->next;
2806 }
2807 return NULL;
2808}
2809
2810static char * sh_userid_get (uid_t id, int which, char * out, size_t len)
2811{
2812 char * user = NULL;
2813
2814 SH_MUTEX_LOCK_UNSAFE(mutex_cache);
2815 if (which == CACHE_UID)
2816 user = sh_userid_search(uid_list, id);
2817 else
2818 user = sh_userid_search(gid_list, id);
2819 if (user)
2820 {
2821 sl_strlcpy(out, user, len);
2822 user = out;
2823 }
2824 SH_MUTEX_UNLOCK_UNSAFE(mutex_cache);
2825
2826 return user;
2827}
2828
2829/* --------- end caching code --------- */
2830
2831#include "sh_subuid.h"
2832
2833char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len)
2834{
2835 struct passwd * tempres;
2836#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2837 struct passwd pwd;
2838 char * buffer;
2839#endif
2840 int status = 0;
2841 char errbuf[SH_ERRBUF_SIZE];
2842 char * tmp;
2843
2844 SL_ENTER(_("sh_unix_getUIDname"));
2845
2846 tmp = sh_userid_get(uid, CACHE_UID, out, len);
2847
2848 if (tmp)
2849 {
2850 if (tmp[0] != '\0')
2851 {
2852 SL_RETURN( out, _("sh_unix_getUIDname"));
2853 }
2854 else
2855 {
2856 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2857 }
2858 }
2859
2860#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2861 buffer = SH_ALLOC(SH_PWBUF_SIZE);
2862 sh_getpwuid_r(uid, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
2863#else
2864 errno = 0;
2865 tempres = sh_getpwuid(uid);
2866 status = errno;
2867#endif
2868
2869 /* case 1: we have it
2870 */
2871 if (tempres && tempres->pw_name != NULL)
2872 {
2873
2874 sl_strlcpy(out, tempres->pw_name, len);
2875 sh_userid_add(uid, out, CACHE_UID);
2876
2877#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2878 SH_FREE(buffer);
2879#endif
2880
2881 SL_RETURN( out, _("sh_unix_getUIDname"));
2882 }
2883
2884#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2885 SH_FREE(buffer);
2886#endif
2887
2888 if (tempres == NULL)
2889 {
2890 char * pwname = sh_get_subuid ((unsigned long) uid);
2891
2892 if (pwname)
2893 {
2894 sl_strlcpy(out, pwname, len);
2895 sh_userid_add(uid, out, CACHE_UID);
2896 SL_RETURN( out, _("sh_unix_getUIDname"));
2897 }
2898
2899 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2900 sh_error_message(status, errbuf, sizeof(errbuf)),
2901 _("getpwuid"), (long) uid, _("completely missing"));
2902 sh_userid_add(uid, NULL, CACHE_UID);
2903 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2904 }
2905
2906
2907 /* getwpuid returns struct, but no pw_name
2908 */
2909 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2910 sh_error_message(status, errbuf, sizeof(errbuf)),
2911 _("getpwuid"), (long) uid, _("pw_user"));
2912 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2913}
2914
2915char * sh_unix_getGIDname (int level, gid_t gid, char * out, size_t len)
2916{
2917 struct group * tempres;
2918 int status = 0;
2919
2920#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2921 struct group grp;
2922 char * buffer;
2923#endif
2924 char errbuf[SH_ERRBUF_SIZE];
2925 char * tmp;
2926
2927 SL_ENTER(_("sh_unix_getGIDname"));
2928
2929 tmp = sh_userid_get((uid_t)gid, CACHE_GID, out, len);
2930
2931 if (tmp)
2932 {
2933 if (tmp[0] != '\0')
2934 {
2935 SL_RETURN( out, _("sh_unix_getGIDname"));
2936 }
2937 else
2938 {
2939 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2940 }
2941 }
2942
2943#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2944 buffer = SH_ALLOC(SH_GRBUF_SIZE);
2945 status = sh_getgrgid_r(gid, &grp, buffer, SH_GRBUF_SIZE, &tempres);
2946#else
2947 errno = 0;
2948 tempres = sh_getgrgid(gid);
2949 status = errno;
2950#endif
2951
2952 if (status == ERANGE)
2953 {
2954 static int seen = 0;
2955
2956 if (seen == 0)
2957 {
2958 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2959 sh_error_message(status, errbuf, sizeof(errbuf)),
2960 _("getgrgid"), (long) gid, _("line too long in group entry"));
2961 ++seen;
2962 }
2963
2964#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2965 SH_FREE(buffer);
2966#endif
2967
2968 sh_userid_add(gid, NULL, CACHE_GID);
2969 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2970 }
2971
2972 if (tempres && tempres->gr_name != NULL)
2973 {
2974
2975 sl_strlcpy(out, tempres->gr_name, len);
2976 sh_userid_add((uid_t)gid, out, CACHE_GID);
2977
2978#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2979 SH_FREE(buffer);
2980#endif
2981
2982 SL_RETURN( out, _("sh_unix_getGIDname"));
2983 }
2984
2985#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2986 SH_FREE(buffer);
2987#endif
2988
2989 if (tempres == NULL)
2990 {
2991 char * grname = sh_get_subgid ((unsigned long) gid);
2992
2993 if (grname)
2994 {
2995 sl_strlcpy(out, grname, len);
2996 sh_userid_add((uid_t)gid, out, CACHE_GID);
2997 SL_RETURN( out, _("sh_unix_getGIDname"));
2998 }
2999
3000 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
3001 sh_error_message(status, errbuf, sizeof(errbuf)),
3002 _("getgrgid"), (long) gid, _("completely missing"));
3003 sh_userid_add(gid, NULL, CACHE_GID);
3004 SL_RETURN( NULL, _("sh_unix_getGIDname"));
3005 }
3006
3007 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
3008 sh_error_message(status, errbuf, sizeof(errbuf)),
3009 _("getgrgid"), (long) gid, _("gr_name"));
3010 SL_RETURN( NULL, _("sh_unix_getGIDname"));
3011}
3012
3013int sh_unix_getUser ()
3014{
3015 char * p;
3016 uid_t seuid, sruid;
3017 char user[USER_MAX];
3018 char dir[SH_PATHBUF];
3019
3020 SL_ENTER(_("sh_unix_getUser"));
3021
3022 seuid = geteuid();
3023
3024 sh.effective.uid = seuid;
3025
3026 p = sh_unix_getUIDdir (SH_ERR_ERR, seuid, dir, sizeof(dir));
3027
3028 if (p == NULL)
3029 SL_RETURN((-1), _("sh_unix_getUser"));
3030 else
3031 {
3032 if (sl_strlen(p) >= SH_PATHBUF) {
3033 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
3034 _("getpwuid"), (long) seuid, _("pw_home"));
3035 SL_RETURN((-1), _("sh_unix_getUser"));
3036 } else {
3037 sl_strlcpy ( sh.effective.home, p, SH_PATHBUF);
3038 }
3039 }
3040
3041 sruid = getuid();
3042
3043 sh.real.uid = sruid;
3044
3045 p = sh_unix_getUIDname (SH_ERR_ERR, sruid, user, sizeof(user));
3046 if (p == NULL)
3047 SL_RETURN((-1), _("sh_unix_getUser"));
3048 else
3049 {
3050 if (sl_strlen(p) >= USER_MAX) {
3051 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
3052 _("getpwuid"), (long) sruid, _("pw_user"));
3053 SL_RETURN((-1), _("sh_unix_getUser"));
3054 } else {
3055 sl_strlcpy ( sh.real.user, p, USER_MAX);
3056 }
3057 }
3058
3059 p = sh_unix_getUIDdir (SH_ERR_ERR, sruid, dir, sizeof(dir));
3060
3061 if (p == NULL)
3062 SL_RETURN((-1), _("sh_unix_getUser"));
3063 else
3064 {
3065 if (sl_strlen(p) >= SH_PATHBUF) {
3066 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
3067 _("getpwuid"), (long) sruid, _("pw_home"));
3068 SL_RETURN((-1), _("sh_unix_getUser"));
3069 } else {
3070 sl_strlcpy ( sh.real.home, p, SH_PATHBUF);
3071 }
3072 }
3073
3074 SL_RETURN((0), _("sh_unix_getUser"));
3075
3076 /* notreached */
3077}
3078
3079/* return >0 on success, -1 on EOF */
3080int sh_unix_getline (SL_TICKET fd, char * line, int sizeofline)
3081{
3082 register int count;
3083 register int n = 0;
3084 char c;
3085
3086 SL_ENTER(_("sh_unix_getline"));
3087
3088 if (sizeofline < 2) {
3089 line[0] = '\0';
3090 SL_RETURN((0), _("sh_unix_getline"));
3091 }
3092
3093 --sizeofline;
3094
3095 while (n < sizeofline) {
3096
3097 count = sl_read (fd, &c, 1);
3098
3099 /* end of file
3100 */
3101 if (count < 1) {
3102 line[n] = '\0';
3103 n = -1;
3104 break;
3105 }
3106
3107 if (/* c != '\0' && */ c != '\n') {
3108 line[n] = c;
3109 ++n;
3110 } else if (c == '\n') {
3111 if (n > 0) {
3112 line[n] = '\0';
3113 break;
3114 } else {
3115 line[n] = '\n'; /* get newline only if only char on line */
3116 ++n;
3117 line[n] = '\0';
3118 break;
3119 }
3120 } else {
3121 line[n] = '\0';
3122 break;
3123 }
3124
3125 }
3126
3127
3128 line[sizeofline] = '\0'; /* make sure line is terminated */
3129 SL_RETURN((n), _("sh_unix_getline"));
3130}
3131
3132
3133#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
3134
3135/**************************************************************
3136 *
3137 * --- FILE INFO ---
3138 *
3139 **************************************************************/
3140
3141#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
3142
3143#if defined(__linux__)
3144
3145/* --- Determine ext2fs file attributes. ---
3146 */
3147#include <sys/ioctl.h>
3148#if defined(HAVE_EXT2FS_EXT2_FS_H)
3149#include <ext2fs/ext2_fs.h>
3150#elif defined(HAVE_LINUX_EXT2_FS_H)
3151#include <linux/ext2_fs.h>
3152#endif
3153
3154/* __linux__ includes */
3155#endif
3156
3157static
3158int sh_unix_getinfo_attr (char * name,
3159 unsigned long * flags,
3160 char * c_attr,
3161 int fd, struct stat * buf)
3162{
3163
3164/* TAKEN FROM:
3165 *
3166 * lsattr.c - List file attributes on an ext2 file system
3167 *
3168 * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
3169 * Laboratoire MASI, Institut Blaise Pascal
3170 * Universite Pierre et Marie Curie (Paris VI)
3171 *
3172 * This file can be redistributed under the terms of the GNU General
3173 * Public License
3174 */
3175
3176#ifdef HAVE_STAT_FLAGS
3177
3178 SL_ENTER(_("sh_unix_getinfo_attr"));
3179
3180 *flags = 0;
3181
3182 /* cast to void to avoid compiler warning about unused parameters */
3183 (void) fd;
3184 (void) name;
3185
3186#ifdef UF_NODUMP
3187 if (buf->st_flags & UF_NODUMP) {
3188 *flags |= UF_NODUMP;
3189 c_attr[0] = 'd';
3190 }
3191#endif
3192#ifdef UF_IMMUTABLE
3193 if (buf->st_flags & UF_IMMUTABLE) {
3194 *flags |= UF_IMMUTABLE;
3195 c_attr[1] = 'i';
3196 }
3197#endif
3198#ifdef UF_APPEND
3199 if (buf->st_flags & UF_APPEND) {
3200 *flags |= UF_APPEND;
3201 c_attr[2] = 'a';
3202 }
3203#endif
3204#ifdef UF_NOUNLINK
3205 if (buf->st_flags & UF_NOUNLINK) {
3206 *flags |= UF_NOUNLINK;
3207 c_attr[3] = 'u';
3208 }
3209#endif
3210#ifdef UF_OPAQUE
3211 if (buf->st_flags & UF_OPAQUE) {
3212 *flags |= UF_OPAQUE;
3213 c_attr[4] = 'o';
3214 }
3215#endif
3216#ifdef SF_ARCHIVED
3217 if (buf->st_flags & SF_ARCHIVED) {
3218 *flags |= SF_ARCHIVED;
3219 c_attr[5] = 'R';
3220 }
3221
3222#endif
3223#ifdef SF_IMMUTABLE
3224 if (buf->st_flags & SF_IMMUTABLE) {
3225 *flags |= SF_IMMUTABLE;
3226 c_attr[6] = 'I';
3227 }
3228#endif
3229#ifdef SF_APPEND
3230 if (buf->st_flags & SF_APPEND) {
3231 *flags |= SF_APPEND;
3232 c_attr[7] = 'A';
3233 }
3234#endif
3235#ifdef SF_NOUNLINK
3236 if (buf->st_flags & SF_NOUNLINK) {
3237 *flags |= SF_NOUNLINK;
3238 c_attr[8] = 'U';
3239 }
3240#endif
3241
3242 /* ! HAVE_STAT_FLAGS */
3243#else
3244
3245#ifdef HAVE_EXT2_IOCTLS
3246 int /* fd, */ r, f;
3247 unsigned long keep_flags = 0;
3248
3249 SL_ENTER(_("sh_unix_getinfo_attr"));
3250
3251 *flags = 0;
3252
3253 (void) buf;
3254
3255 /* open() -> aud_open() R.Wichmann
3256 fd = aud_open (FIL__, __LINE__, SL_YESPRIV, name, O_RDONLY|O_NONBLOCK, 0);
3257 */
3258
3259 if (fd == -1 || name == NULL)
3260 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
3261
3262
3263 r = ioctl (fd, FS_IOC_GETFLAGS, &f);
3264 /* sl_close_fd (FIL__, __LINE__, fd); */
3265
3266 if (r == -1)
3267 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
3268
3269 if (f == 0)
3270 SL_RETURN(0, _("sh_unix_getinfo_attr"));
3271
3272 *flags = f;
3273
3274/* ! HAVE_FS_IOCTLS */
3275#else
3276
3277 SL_ENTER(_("sh_unix_getinfo_attr"));
3278
3279 *flags = 0; /* modified by R.Wichmann */
3280
3281/* ! HAVE_FS_IOCTLS */
3282#endif
3283/*
3284 * END
3285 *
3286 * lsattr.c - List file attributes on an ext2 file system
3287 */
3288
3289 if (*flags == 0)
3290 goto theend;
3291
3292#ifdef FS_SECRM_FL
3293 if ( (*flags & FS_SECRM_FL) != 0 ) { c_attr[0] = 's'; keep_flags |= FS_SECRM_FL; }
3294#endif
3295#ifdef FS_UNRM_FL
3296 if ( (*flags & FS_UNRM_FL) != 0 ) { c_attr[1] = 'u'; keep_flags |= FS_UNRM_FL; }
3297#endif
3298#ifdef FS_SYNC_FL
3299 if ( (*flags & FS_SYNC_FL) != 0 ) { c_attr[2] = 'S'; keep_flags |= FS_SYNC_FL; }
3300#endif
3301#ifdef FS_IMMUTABLE_FL
3302 if ( (*flags & FS_IMMUTABLE_FL) != 0) { c_attr[3] = 'i'; keep_flags |= FS_IMMUTABLE_FL; }
3303#endif
3304#ifdef FS_APPEND_FL
3305 if ( (*flags & FS_APPEND_FL) != 0 ) { c_attr[4] = 'a'; keep_flags |= FS_APPEND_FL; }
3306#endif
3307#ifdef FS_NODUMP_FL
3308 if ( (*flags & FS_NODUMP_FL) != 0 ) { c_attr[5] = 'd'; keep_flags |= FS_NODUMP_FL; }
3309#endif
3310#ifdef FS_NOATIME_FL
3311 if ( (*flags & FS_NOATIME_FL) != 0) { c_attr[6] = 'A'; keep_flags |= FS_NOATIME_FL; }
3312#endif
3313#ifdef FS_COMPR_FL
3314 if ( (*flags & FS_COMPR_FL) != 0 ) { c_attr[7] = 'c'; keep_flags |= FS_COMPR_FL; }
3315#endif
3316
3317#ifdef FS_TOPDIR_FL
3318 if ( (*flags & FS_TOPDIR_FL) != 0 ) { c_attr[8] = 'T'; keep_flags |= FS_TOPDIR_FL; }
3319#endif
3320#ifdef FS_DIRSYNC_FL
3321 if ( (*flags & FS_DIRSYNC_FL) != 0 ) { c_attr[9] = 'D'; keep_flags |= FS_DIRSYNC_FL; }
3322#endif
3323#ifdef FS_NOTAIL_FL
3324 if ( (*flags & FS_NOTAIL_FL) != 0 ) { c_attr[10] = 't'; keep_flags |= FS_NOTAIL_FL; }
3325#endif
3326#ifdef FS_JOURNAL_DATA_FL
3327 if ( (*flags & FS_JOURNAL_DATA_FL) != 0) { c_attr[11] = 'j'; keep_flags |= FS_JOURNAL_DATA_FL; }
3328#endif
3329
3330 *flags = keep_flags;
3331
3332 theend:
3333 /* !HAVE_STAT_FLAGS */
3334#endif
3335
3336 c_attr[ATTRBUF_USED] = '\0';
3337
3338 SL_RETURN(0, _("sh_unix_getinfo_attr"));
3339}
3340
3341/* defined(__linux__) || defined(HAVE_STAT_FLAGS) */
3342#endif
3343
3344/* determine file type
3345 */
3346static
3347int sh_unix_getinfo_type (struct stat * buf,
3348 ShFileType * type,
3349 char * c_mode)
3350{
3351 SL_ENTER(_("sh_unix_getinfo_type"));
3352
3353 if ( S_ISREG(buf->st_mode) ) {
3354 (*type) = SH_FILE_REGULAR;
3355 c_mode[0] = '-';
3356 }
3357 else if ( S_ISLNK(buf->st_mode) ) {
3358 (*type) = SH_FILE_SYMLINK;
3359 c_mode[0] = 'l';
3360 }
3361 else if ( S_ISDIR(buf->st_mode) ) {
3362 (*type) = SH_FILE_DIRECTORY;
3363 c_mode[0] = 'd';
3364 }
3365 else if ( S_ISCHR(buf->st_mode) ) {
3366 (*type) = SH_FILE_CDEV;
3367 c_mode[0] = 'c';
3368 }
3369 else if ( S_ISBLK(buf->st_mode) ) {
3370 (*type) = SH_FILE_BDEV;
3371 c_mode[0] = 'b';
3372 }
3373 else if ( S_ISFIFO(buf->st_mode) ) {
3374 (*type) = SH_FILE_FIFO;
3375 c_mode[0] = '|';
3376 }
3377 else if ( S_ISSOCK(buf->st_mode) ) {
3378 (*type) = SH_FILE_SOCKET;
3379 c_mode[0] = 's';
3380 }
3381 else if ( S_ISDOOR(buf->st_mode) ) {
3382 (*type) = SH_FILE_DOOR;
3383 c_mode[0] = 'D';
3384 }
3385 else if ( S_ISPORT(buf->st_mode) ) {
3386 (*type) = SH_FILE_PORT;
3387 c_mode[0] = 'P';
3388 }
3389 else {
3390 (*type) = SH_FILE_UNKNOWN;
3391 c_mode[0] = '?';
3392 }
3393
3394 SL_RETURN(0, _("sh_unix_getinfo_type"));
3395}
3396
3397int sh_unix_get_ftype(char * fullpath)
3398{
3399 char c_mode[CMODE_SIZE];
3400 struct stat buf;
3401 ShFileType type;
3402 int res;
3403
3404 SL_ENTER(_("sh_unix_get_ftype"));
3405
3406 res = retry_lstat(FIL__, __LINE__, fullpath, &buf);
3407
3408 if (res < 0)
3409 SL_RETURN(SH_FILE_UNKNOWN, _("sh_unix_getinfo_type"));
3410
3411 sh_unix_getinfo_type (&buf, &type, c_mode);
3412
3413 SL_RETURN(type, _("sh_unix_get_ftype"));
3414}
3415
3416
3417static
3418int sh_unix_getinfo_mode (struct stat *buf,
3419 unsigned int * mode,
3420 char * c_mode)
3421{
3422
3423 SL_ENTER(_("sh_unix_getinfo_mode"));
3424
3425 (*mode) = buf->st_mode;
3426
3427 /* make 'ls'-like string */
3428
3429 if ( (buf->st_mode & S_IRUSR) != 0 ) c_mode[1] = 'r';
3430 if ( (buf->st_mode & S_IWUSR) != 0 ) c_mode[2] = 'w';
3431 if ( (buf->st_mode & S_IXUSR) != 0 ) {
3432 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 's';
3433 else c_mode[3] = 'x';
3434 } else {
3435 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 'S';
3436 }
3437
3438 if ( (buf->st_mode & S_IRGRP) != 0 ) c_mode[4] = 'r';
3439 if ( (buf->st_mode & S_IWGRP) != 0 ) c_mode[5] = 'w';
3440 if ( (buf->st_mode & S_IXGRP) != 0 ) {
3441 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 's';
3442 else c_mode[6] = 'x';
3443 } else {
3444 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 'S';
3445 }
3446
3447 if ( (buf->st_mode & S_IROTH) != 0 ) c_mode[7] = 'r';
3448 if ( (buf->st_mode & S_IWOTH) != 0 ) c_mode[8] = 'w';
3449#ifdef S_ISVTX /* not POSIX */
3450 if ( (buf->st_mode & S_IXOTH) != 0 ) {
3451 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 't';
3452 else c_mode[9] = 'x';
3453 } else {
3454 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 'T';
3455 }
3456#else
3457 if ( (buf->st_mode & S_IXOTH) != 0 ) c_mode[9] = 'x';
3458#endif
3459
3460 SL_RETURN(0, _("sh_unix_getinfo_mode"));
3461}
3462
3463
3464long IO_Limit = 0;
3465
3466void sh_unix_io_pause ()
3467{
3468 long runtime;
3469 float someval;
3470 unsigned long sometime;
3471
3472 if (IO_Limit == 0)
3473 {
3474 return;
3475 }
3476 else
3477 {
3478 runtime = (long) (time(NULL) - sh.statistics.time_start);
3479
3480 if (runtime > 0 && (long)(sh.statistics.bytes_hashed/runtime) > IO_Limit)
3481 {
3482 someval = sh.statistics.bytes_hashed - (IO_Limit * runtime);
3483 someval /= (float) IO_Limit;
3484 if (someval < 1.0)
3485 {
3486 someval *= 1000; /* milliseconds in a second */
3487 sometime = (unsigned long) someval;
3488 retry_msleep(0, sometime);
3489 }
3490 else
3491 {
3492 sometime = (unsigned long) someval;
3493 retry_msleep (sometime, 0);
3494 }
3495 }
3496 }
3497 return;
3498}
3499
3500int sh_unix_set_io_limit (const char * c)
3501{
3502 long val;
3503
3504 SL_ENTER(_("sh_unix_set_io_limit"));
3505
3506 val = strtol (c, (char **)NULL, 10);
3507 if (val < 0)
3508 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
3509 _("set I/O limit"), c);
3510
3511 val = (val < 0 ? 0 : val);
3512
3513 IO_Limit = val * 1024;
3514 SL_RETURN( 0, _("sh_unix_set_io_limit"));
3515}
3516
3517/* obtain file info
3518 */
3519extern int flag_err_debug;
3520
3521#include "sh_ignore.h"
3522
3523int sh_unix_checksum_size (char * filename, off_t size, int is_max_size,
3524 char * fileHash, int alert_timeout, SL_TICKET fd, unsigned long mask)
3525{
3526 file_type * tmpFile;
3527 int status;
3528
3529 SL_ENTER(_("sh_unix_checksum_size"));
3530
3531 tmpFile = SH_ALLOC(sizeof(file_type));
3532 tmpFile->link_path = NULL;
3533
3534 if (sh.flag.checkSum != SH_CHECK_INIT)
3535 {
3536 /* lookup file in database */
3537 if (is_max_size == S_TRUE) {
3538 status = sh_hash_get_it (filename, tmpFile, NULL);
3539 if ((status != 0) || (tmpFile->size > size)) {
3540 goto out;
3541 }
3542 } else {
3543 tmpFile->size = size;
3544 }
3545 }
3546 else
3547 {
3548 tmpFile->size = size;
3549 }
3550
3551 /* if last <= current get checksum */
3552 if (tmpFile->size <= size)
3553 {
3554 char hashbuf[KEYBUF_SIZE];
3555 UINT64 local_length = (UINT64) (tmpFile->size < 0 ? 0 : tmpFile->size);
3556 if (sh.flag.opts == S_TRUE) sh_tiger_set_hashtype_mask(mask);
3557 sl_strlcpy(fileHash,
3558 sh_tiger_generic_hash (filename, fd, &(local_length),
3559 alert_timeout, hashbuf, sizeof(hashbuf)),
3560 KEY_LEN+1);
3561
3562 /* return */
3563 if (tmpFile->link_path) SH_FREE(tmpFile->link_path);
3564 SH_FREE(tmpFile);
3565 SL_RETURN( 0, _("sh_unix_checksum_size"));
3566 }
3567
3568 out:
3569 if (tmpFile->link_path) SH_FREE(tmpFile->link_path);
3570 SH_FREE(tmpFile);
3571 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3572 SL_RETURN( -1, _("sh_unix_checksum_size"));
3573}
3574
3575/********************************************************
3576 * Search rotated logfile
3577 */
3578extern char * sh_rotated_log_search(const char * path, struct stat * buf);
3579
3580int sh_check_rotated_log (const char * path,
3581 UINT64 old_size, UINT64 old_inode, const char * old_hash, unsigned long mask)
3582{
3583 struct stat obuf;
3584 UINT64 length_nolim = TIGER_NOLIM;
3585 int retval = S_FALSE;
3586
3587 if (old_size != length_nolim)
3588 {
3589 char hashbuf[KEYBUF_SIZE];
3590 char * rotated_file;
3591
3592 obuf.st_ino = old_inode;
3593 rotated_file = sh_rotated_log_search(path, &obuf);
3594
3595 if (rotated_file && (0 != strcmp(path, rotated_file)))
3596 {
3597 SL_TICKET fd = sl_open_fastread (FIL__, __LINE__, rotated_file, SL_YESPRIV);
3598 if (!SL_ISERROR(fd))
3599 {
3600 sh_unix_checksum_size (rotated_file, old_size, S_FALSE,
3601 hashbuf, 120 /* alert_timeout */, fd, mask);
3602
3603 sl_close(fd);
3604
3605 if (strncmp (old_hash, hashbuf, KEY_LEN) == 0) {
3606 retval = S_TRUE;
3607 }
3608 }
3609 }
3610 if (rotated_file) {
3611 SH_FREE(rotated_file);
3612 }
3613 }
3614 return retval;
3615}
3616
3617
3618int sh_unix_check_selinux = S_FALSE;
3619int sh_unix_check_acl = S_FALSE;
3620int sh_unix_check_attributes = S_TRUE;
3621
3622#ifdef USE_ACL
3623
3624#include <sys/acl.h>
3625static char * sh_unix_getinfo_acl (char * path, int fd, struct stat * buf)
3626{
3627 /* system.posix_acl_access, system.posix_acl_default
3628 */
3629 char * out = NULL;
3630 char * collect = NULL;
3631 char * tmp;
3632 char * out_compact;
3633 ssize_t len;
3634 acl_t result;
3635
3636 SL_ENTER(_("sh_unix_getinfo_acl"));
3637
3638 result = (fd == -1) ?
3639 acl_get_file (path, ACL_TYPE_ACCESS) :
3640 acl_get_fd (fd);
3641
3642 if (result)
3643 {
3644 out = acl_to_text (result, &len);
3645 if (out && (len > 0)) {
3646 out_compact = sh_util_acl_compact (out, len);
3647 acl_free(out);
3648 if (out_compact)
3649 {
3650 collect = sh_util_strconcat (_("acl_access:"), out_compact, NULL);
3651 SH_FREE(out_compact);
3652 }
3653 }
3654 acl_free(result);
3655 }
3656
3657
3658 if ( S_ISDIR(buf->st_mode) )
3659 {
3660 result = acl_get_file (path, ACL_TYPE_DEFAULT);
3661
3662 if (result)
3663 {
3664 out = acl_to_text (result, &len);
3665 if (out && (len > 0)) {
3666 out_compact = sh_util_acl_compact (out, len);
3667 acl_free(out);
3668 if (out_compact) {
3669 if (collect) {
3670 tmp = sh_util_strconcat (_("acl_default:"),
3671 out_compact, ":", collect, NULL);
3672 SH_FREE(collect);
3673 }
3674 else {
3675 tmp = sh_util_strconcat (_("acl_default:"), out_compact, NULL);
3676 }
3677 SH_FREE(out_compact);
3678 collect = tmp;
3679 }
3680 }
3681 acl_free(result);
3682 }
3683 }
3684
3685 SL_RETURN((collect),_("sh_unix_getinfo_acl"));
3686}
3687#endif
3688
3689#ifdef USE_XATTR
3690
3691#include <attr/xattr.h>
3692static char * sh_unix_getinfo_xattr_int (char * path, int fd, char * name)
3693{
3694 char * out = NULL;
3695 char * tmp = NULL;
3696 size_t size = 256;
3697 ssize_t result;
3698
3699 SL_ENTER(_("sh_unix_getinfo_xattr_int"));
3700
3701 out = SH_ALLOC(size);
3702
3703 result = (fd == -1) ?
3704 lgetxattr (path, name, out, size-1) :
3705 fgetxattr (fd, name, out, size-1);
3706
3707 if (result == -1 && errno == ERANGE)
3708 {
3709 SH_FREE(out);
3710 result = (fd == -1) ?
3711 lgetxattr (path, name, NULL, 0) :
3712 fgetxattr (fd, name, NULL, 0);
3713 size = result + 1;
3714 out = SH_ALLOC(size);
3715 result = (fd == -1) ?
3716 lgetxattr (path, name, out, size-1) :
3717 fgetxattr (fd, name, out, size-1);
3718 }
3719
3720 if ((result > 0) && ((size_t)result < size))
3721 {
3722 out[size-1] = '\0';
3723 tmp = out;
3724 }
3725 else
3726 {
3727 SH_FREE(out);
3728 }
3729
3730 SL_RETURN((tmp),_("sh_unix_getinfo_xattr_int"));
3731}
3732
3733
3734static char * sh_unix_getinfo_xattr (char * path, int fd, struct stat * buf)
3735{
3736 /* system.posix_acl_access, system.posix_acl_default, security.selinux
3737 */
3738 char * tmp;
3739 char * out = NULL;
3740 char * collect = NULL;
3741
3742 SL_ENTER(_("sh_unix_getinfo_xattr"));
3743
3744#ifdef USE_ACL
3745 /*
3746 * we need the acl_get_fd/acl_get_file functions, getxattr will only
3747 * yield the raw bytes
3748 */
3749 if (sh_unix_check_acl == S_TRUE)
3750 {
3751 out = sh_unix_getinfo_acl(path, fd, buf);
3752
3753 if (out)
3754 {
3755 collect = out;
3756 }
3757 }
3758#else
3759 (void) buf;
3760#endif
3761
3762 if (sh_unix_check_selinux == S_TRUE)
3763 {
3764 out = sh_unix_getinfo_xattr_int(path, fd, _("security.selinux"));
3765
3766 if (out)
3767 {
3768 if (collect) {
3769 tmp = sh_util_strconcat(_("selinux:"), out, ":", collect, NULL);
3770 SH_FREE(collect);
3771 }
3772 else {
3773 tmp = sh_util_strconcat(_("selinux:"), out, NULL);
3774 }
3775 SH_FREE(out);
3776 collect = tmp;
3777 }
3778 }
3779
3780 SL_RETURN((collect),_("sh_unix_getinfo_xattr"));
3781}
3782#endif
3783
3784#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
3785int sh_unix_setcheckattributes (const char * c)
3786{
3787 int i;
3788 SL_ENTER(_("sh_unix_setcheckattributes"));
3789 i = sh_util_flagval(c, &(sh_unix_check_attributes));
3790
3791 SL_RETURN(i, _("sh_unix_setcheckattributes"));
3792}
3793#endif
3794
3795#ifdef USE_XATTR
3796int sh_unix_setcheckselinux (const char * c)
3797{
3798 int i;
3799 SL_ENTER(_("sh_unix_setcheckselinux"));
3800 i = sh_util_flagval(c, &(sh_unix_check_selinux));
3801
3802 SL_RETURN(i, _("sh_unix_setcheckselinux"));
3803}
3804#endif
3805
3806#ifdef USE_ACL
3807int sh_unix_setcheckacl (const char * c)
3808{
3809 int i;
3810 SL_ENTER(_("sh_unix_setcheckacl"));
3811 i = sh_util_flagval(c, &(sh_unix_check_acl));
3812
3813 SL_RETURN(i, _("sh_unix_setcheckacl"));
3814}
3815#endif
3816
3817#ifdef HAVE_LIBZ
3818#include <zlib.h>
3819#endif
3820
3821
3822static void * sh_dummy_filename;
3823void * sh_dummy_tmp;
3824void * sh_dummy_tmp2;
3825
3826int sh_unix_getinfo (int level, const char * filename, file_type * theFile,
3827 char * fileHash, int policy)
3828{
3829 char timestr[81];
3830 long runtim;
3831 struct stat buf;
3832 struct stat lbuf;
3833 struct stat fbuf;
3834 volatile int stat_return;
3835 volatile int stat_errno = 0;
3836
3837 ShFileType type;
3838 unsigned int mode;
3839 char * tmp;
3840 char * tmp2;
3841
3842 char * linknamebuf;
3843 volatile int linksize;
3844
3845 extern int get_the_fd (SL_TICKET ticket);
3846
3847 volatile SL_TICKET rval_open;
3848 volatile int err_open = 0;
3849
3850 volatile int fd;
3851 volatile int fstat_return;
3852 volatile int fstat_errno = 0;
3853 volatile int try = 0;
3854
3855 sh_string * content = NULL;
3856
3857 time_t tend;
3858 time_t tstart;
3859
3860
3861 char * path = NULL;
3862
3863 volatile int alert_timeout = 120;
3864
3865 path = theFile->fullpath;
3866
3867 SL_ENTER(_("sh_unix_getinfo"));
3868
3869 if (!MODI_INITIALIZED(theFile->check_flags))
3870 {
3871 tmp2 = sh_util_safe_name (theFile->fullpath);
3872 SH_MUTEX_LOCK(mutex_thread_nolog);
3873 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_SUBGPATH,
3874 _("Uninitialized check mask"), _("sh_unix_getinfo"),
3875 tmp2);
3876 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3877 SH_FREE(tmp2);
3878 SL_RETURN((-1),_("sh_unix_getinfo"));
3879 }
3880
3881 /* Take the address to keep gcc from putting it into a register.
3882 * Avoids the 'clobbered by longjmp' warning.
3883 */
3884 sh_dummy_filename = (void *) &filename;
3885 sh_dummy_tmp = (void *) &tmp;
3886 sh_dummy_tmp2 = (void *) &tmp2;
3887
3888 /* --- Stat the file, and get checksum. ---
3889 */
3890 tstart = time(NULL);
3891
3892 stat_return = retry_lstat (FIL__, __LINE__,
3893 path /* theFile->fullpath */, &buf);
3894
3895 if (stat_return)
3896 stat_errno = errno;
3897
3898 theFile->link_path = NULL;
3899
3900 try_again:
3901
3902 fd = -1;
3903 fstat_return = -1;
3904 rval_open = -1;
3905
3906 if (stat_return == 0 && S_ISREG(buf.st_mode))
3907 {
3908 rval_open = sl_open_fastread (FIL__, __LINE__,
3909 path /* theFile->fullpath */, SL_YESPRIV);
3910 if (SL_ISERROR(rval_open))
3911 {
3912 char * stale = sl_check_stale();
3913
3914 if (stale)
3915 {
3916 SH_MUTEX_LOCK(mutex_thread_nolog);
3917 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, err_open, MSG_E_SUBGEN,
3918 stale, _("sh_unix_getinfo_open"));
3919 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3920 }
3921
3922 if (errno == EBADF && try == 0) /* obsolete, but we keep this, just in case */
3923 {
3924 /* cppcheck-suppress syntaxError */
3925 ++try;
3926 goto try_again;
3927 }
3928 err_open = errno;
3929 }
3930
3931 alert_timeout = 120; /* this is per 8K block now ! */
3932
3933 if (path[1] == 'p' && path[5] == '/' && path[2] == 'r' &&
3934 path[3] == 'o' && path[4] == 'c' && path[0] == '/')
3935 {
3936 /* seven is magic */
3937 alert_timeout = 7;
3938 }
3939
3940 fd = get_the_fd(rval_open);
3941 }
3942
3943 tend = time(NULL);
3944
3945 /* An unprivileged user may slow lstat/open to a crawl
3946 * with clever path/symlink setup
3947 */
3948 if ((tend - tstart) > (time_t) /* 60 */ 6)
3949 {
3950 tmp2 = sh_util_safe_name (theFile->fullpath);
3951 SH_MUTEX_LOCK(mutex_thread_nolog);
3952 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_TOOLATE,
3953 (long)(tend - tstart), tmp2);
3954 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3955 SH_FREE(tmp2);
3956 }
3957
3958 if (fd >= 0)
3959 {
3960 fstat_return = retry_fstat (FIL__, __LINE__, fd, &fbuf);
3961
3962 if (fstat_return)
3963 {
3964 char * stale;
3965
3966 fstat_errno = errno;
3967
3968 stale = sl_check_stale();
3969
3970 if (stale)
3971 {
3972 SH_MUTEX_LOCK(mutex_thread_nolog);
3973 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, fstat_errno,
3974 MSG_E_SUBGEN,
3975 stale, _("sh_unix_getinfo_fstat"));
3976 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3977 }
3978
3979 if (try == 0) /* obsolete, but we keep this, just in case */
3980 {
3981 ++try;
3982 sl_close(rval_open);
3983 goto try_again;
3984 }
3985 }
3986 }
3987 else
3988 {
3989 fd = -1;
3990 }
3991
3992
3993 /* --- case 1: lstat failed ---
3994 */
3995 if (stat_return != 0)
3996 {
3997 stat_return = errno;
3998 if (!SL_ISERROR(rval_open))
3999 sl_close(rval_open);
4000 if (sh.flag.checkSum == SH_CHECK_INIT ||
4001 (sh_hash_have_it (theFile->fullpath) >= 0 &&
4002 (!SH_FFLAG_REPORTED_SET(theFile->file_reported))))
4003 {
4004 if (S_FALSE == sh_ignore_chk_del(theFile->fullpath)) {
4005 int flags = sh_hash_getflags (theFile->fullpath);
4006
4007 if ((flags >= 0) && (flags & SH_FFLAG_ENOENT) == 0) {
4008 char errbuf[SH_ERRBUF_SIZE];
4009 uid_t euid;
4010 (void) sl_get_euid(&euid);
4011 tmp2 = sh_util_safe_name (theFile->fullpath);
4012 SH_MUTEX_LOCK(mutex_thread_nolog);
4013 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
4014 _("lstat"),
4015 sh_error_message (stat_errno, errbuf, sizeof(errbuf)),
4016 (long) euid,
4017 tmp2);
4018 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4019 SH_FREE(tmp2);
4020 sh_hash_set_flag (theFile->fullpath, SH_FFLAG_ENOENT);
4021 }
4022 }
4023 }
4024 SL_RETURN((-1),_("sh_unix_getinfo"));
4025 }
4026
4027 /* --- case 2: not a regular file ---
4028 */
4029 else if (! S_ISREG(buf.st_mode))
4030 {
4031 if (fileHash != NULL)
4032 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4033 }
4034
4035 /* --- case 3a: a regular file, fstat ok ---
4036 */
4037 else if (fstat_return == 0 &&
4038 buf.st_mode == fbuf.st_mode &&
4039 buf.st_ino == fbuf.st_ino &&
4040 buf.st_uid == fbuf.st_uid &&
4041 buf.st_gid == fbuf.st_gid &&
4042 buf.st_dev == fbuf.st_dev )
4043 {
4044 if (fileHash != NULL)
4045 {
4046 if ((theFile->check_flags & MODI_CHK) == 0 ||
4047 sh_restrict_this(theFile->fullpath, (UINT64) fbuf.st_size,
4048 (UINT64) fbuf.st_mode, rval_open))
4049 {
4050 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4051 }
4052 else if ((theFile->check_flags & MODI_PREL) != 0 &&
4053 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
4054 alert_timeout, theFile->fullpath))
4055 {
4056 if (0 != sh_prelink_run (theFile->fullpath,
4057 fileHash, alert_timeout, theFile->check_flags))
4058 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4059 }
4060 else
4061 {
4062 char hashbuf[KEYBUF_SIZE];
4063 UINT64 length_current = TIGER_NOLIM;
4064
4065 if (MODI_TXT_ENABLED(theFile->check_flags) && fbuf.st_size < (10 * SH_TXT_MAX))
4066 {
4067 sl_init_content (rval_open, fbuf.st_size);
4068 }
4069
4070 if (sh.flag.opts == S_TRUE) sh_tiger_set_hashtype_mask(theFile->check_flags);
4071 sl_strlcpy(fileHash,
4072 sh_tiger_generic_hash (theFile->fullpath,
4073 rval_open, &length_current,
4074 alert_timeout,
4075 hashbuf, sizeof(hashbuf)),
4076 KEY_LEN+1);
4077
4078 content = sl_get_content(rval_open);
4079 content = sh_string_copy(content);
4080
4081 if ((theFile->check_flags & MODI_SGROW) != 0)
4082 {
4083 /* Update size so it matches the one for which the checksum
4084 has been computed */
4085 fbuf.st_size = length_current;
4086 buf.st_size = fbuf.st_size;
4087 sl_rewind(rval_open);
4088 sh_unix_checksum_size (theFile->fullpath, length_current, S_TRUE,
4089 &fileHash[KEY_LEN + 1],
4090 alert_timeout, rval_open, theFile->check_flags);
4091 }
4092 }
4093 }
4094 }
4095
4096 /* --- case 3b: a regular file, fstat ok, but different ---
4097 */
4098 else if (fstat_return == 0 && S_ISREG(fbuf.st_mode))
4099 {
4100 memcpy (&buf, &fbuf, sizeof( struct stat ));
4101
4102 if (fileHash != NULL)
4103 {
4104 if ((theFile->check_flags & MODI_CHK) == 0 ||
4105 sh_restrict_this(theFile->fullpath, (UINT64) fbuf.st_size,
4106 (UINT64) fbuf.st_mode, rval_open))
4107 {
4108 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4109 }
4110 else if (policy == SH_LEVEL_PRELINK &&
4111 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
4112 alert_timeout, theFile->fullpath))
4113 {
4114 if (0 != sh_prelink_run (theFile->fullpath,
4115 fileHash, alert_timeout, theFile->check_flags))
4116 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4117 }
4118 else
4119 {
4120 char hashbuf[KEYBUF_SIZE];
4121 UINT64 length_current = TIGER_NOLIM;
4122
4123 if (MODI_TXT_ENABLED(theFile->check_flags) && fbuf.st_size < (10 * SH_TXT_MAX))
4124 {
4125 sl_init_content (rval_open, fbuf.st_size);
4126 }
4127
4128 if (sh.flag.opts == S_TRUE) sh_tiger_set_hashtype_mask(theFile->check_flags);
4129 sl_strlcpy(fileHash,
4130 sh_tiger_generic_hash (theFile->fullpath, rval_open,
4131 &length_current,
4132 alert_timeout,
4133 hashbuf, sizeof(hashbuf)),
4134 KEY_LEN + 1);
4135
4136 content = sl_get_content(rval_open);
4137 content = sh_string_copy(content);
4138
4139 if ((theFile->check_flags & MODI_SGROW) != 0)
4140 {
4141 /* Update size so it matches the one for which the checksum
4142 has been computed */
4143 fbuf.st_size = length_current;
4144 buf.st_size = fbuf.st_size;
4145 sl_rewind(rval_open);
4146 sh_unix_checksum_size (theFile->fullpath, length_current, S_TRUE,
4147 &fileHash[KEY_LEN + 1],
4148 alert_timeout, rval_open, theFile->check_flags);
4149 }
4150 }
4151 }
4152 }
4153
4154 /* --- case 4: a regular file, fstat failed ---
4155 */
4156
4157 else /* fstat_return != 0 or !S_ISREG(fbuf.st_mode) or open() failed */
4158 {
4159 uid_t euid;
4160
4161 if (fileHash != NULL)
4162 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4163
4164 if ((theFile->check_flags & MODI_CHK) != 0)
4165 {
4166 tmp2 = sh_util_safe_name (theFile->fullpath);
4167
4168
4169 if (fd >= 0 && fstat_return != 0)
4170 {
4171 char errbuf[SH_ERRBUF_SIZE];
4172 (void) sl_get_euid(&euid);
4173
4174 SH_MUTEX_LOCK(mutex_thread_nolog);
4175 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
4176 _("fstat"),
4177 sh_error_message (fstat_errno, errbuf, sizeof(errbuf)),
4178 (long) euid,
4179 tmp2);
4180 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4181 }
4182 else if (fd >= 0 && !S_ISREG(fbuf.st_mode))
4183 {
4184 SH_MUTEX_LOCK(mutex_thread_nolog);
4185 sh_error_handle (level, FIL__, __LINE__, fstat_errno,
4186 MSG_E_NOTREG, tmp2);
4187 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4188 }
4189 else
4190 {
4191 char errbuf[SH_ERRBUF_SIZE];
4192 char errbuf2[SH_ERRBUF_SIZE];
4193 sl_strlcpy(errbuf, sl_error_string(rval_open), sizeof(errbuf));
4194 sh_error_message(err_open, errbuf2, sizeof(errbuf2));
4195 SH_MUTEX_LOCK(mutex_thread_nolog);
4196 sh_error_handle (level, FIL__, __LINE__, err_open,
4197 MSG_E_READ, errbuf, errbuf2, tmp2);
4198 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4199 }
4200 SH_FREE(tmp2);
4201 }
4202 }
4203
4204
4205 /* --- Determine file type. ---
4206 */
4207 memset (theFile->c_mode, '-', CMODE_SIZE-1);
4208 theFile->c_mode[CMODE_SIZE-1] = '\0';
4209
4210 memset (theFile->link_c_mode, '-', CMODE_SIZE-1);
4211 theFile->link_c_mode[CMODE_SIZE-1] = '\0';
4212
4213 sh_unix_getinfo_type (&buf, &type, theFile->c_mode);
4214 theFile->type = type;
4215
4216#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
4217
4218 /* --- Determine file attributes. ---
4219 */
4220 memset (theFile->c_attributes, '-', ATTRBUF_SIZE);
4221 theFile->c_attributes[ATTRBUF_USED] = '\0';
4222 theFile->attributes = 0;
4223
4224#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
4225 if (theFile->c_mode[0] != 'c' && theFile->c_mode[0] != 'b' &&
4226 theFile->c_mode[0] != 'l' ) {
4227 if (sh_unix_check_attributes == S_TRUE)
4228 sh_unix_getinfo_attr(theFile->fullpath,
4229 &theFile->attributes, theFile->c_attributes,
4230 fd, &buf);
4231 }
4232#endif
4233#endif
4234
4235#if defined(USE_XATTR) && defined(USE_ACL)
4236 if (sh_unix_check_selinux == S_TRUE || sh_unix_check_acl == S_TRUE)
4237 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
4238#elif defined(USE_XATTR)
4239 if (sh_unix_check_selinux == S_TRUE)
4240 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
4241#elif defined(USE_ACL)
4242 if (sh_unix_check_acl == S_TRUE)
4243 theFile->attr_string = sh_unix_getinfo_acl (theFile->fullpath, fd, &buf);
4244#else
4245 theFile->attr_string = NULL;
4246#endif
4247
4248 if (!SL_ISERROR(rval_open))
4249 sl_close(rval_open);
4250
4251
4252 /* --- I/O limit. ---
4253 */
4254 if (IO_Limit > 0)
4255 {
4256 runtim = (long) (time(NULL) - sh.statistics.time_start);
4257
4258 if (runtim > 0 && (long)(sh.statistics.bytes_hashed/runtim) > IO_Limit)
4259 retry_msleep(1, 0);
4260 }
4261
4262 /* --- Determine permissions. ---
4263 */
4264 sh_unix_getinfo_mode (&buf, &mode, theFile->c_mode);
4265
4266 /* --- Trivia. ---
4267 */
4268 theFile->dev = buf.st_dev;
4269 theFile->ino = buf.st_ino;
4270 theFile->mode = buf.st_mode;
4271 theFile->hardlinks = buf.st_nlink;
4272 theFile->owner = buf.st_uid;
4273 theFile->group = buf.st_gid;
4274 theFile->rdev = buf.st_rdev;
4275 theFile->size = buf.st_size;
4276 theFile->blksize = (unsigned long) buf.st_blksize;
4277 theFile->blocks = (unsigned long) buf.st_blocks;
4278 theFile->atime = buf.st_atime;
4279 theFile->mtime = buf.st_mtime;
4280 theFile->ctime = buf.st_ctime;
4281
4282
4283 /* --- Owner and group. ---
4284 */
4285
4286 if (NULL == sh_unix_getGIDname(SH_ERR_ALL, buf.st_gid, theFile->c_group, GROUP_MAX+1)) {
4287
4288 tmp2 = sh_util_safe_name (theFile->fullpath);
4289
4290 if (policy == SH_LEVEL_ALLIGNORE)
4291 {
4292 SH_MUTEX_LOCK(mutex_thread_nolog);
4293 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
4294 MSG_FI_NOGRP,
4295 (long) buf.st_gid, tmp2);
4296 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4297 }
4298 else
4299 {
4300 SH_MUTEX_LOCK(mutex_thread_nolog);
4301 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
4302 MSG_FI_NOGRP,
4303 (long) buf.st_gid, tmp2);
4304 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4305 }
4306 SH_FREE(tmp2);
4307 sl_snprintf(theFile->c_group, GROUP_MAX+1, "%d", (long) buf.st_gid);
4308 }
4309
4310
4311 if (NULL == sh_unix_getUIDname(SH_ERR_ALL, buf.st_uid, theFile->c_owner, USER_MAX+1)) {
4312
4313 tmp2 = sh_util_safe_name (theFile->fullpath);
4314
4315 if (policy == SH_LEVEL_ALLIGNORE)
4316 {
4317 SH_MUTEX_LOCK(mutex_thread_nolog);
4318 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
4319 MSG_FI_NOUSR,
4320 (long) buf.st_uid, tmp2);
4321 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4322 }
4323 else
4324 {
4325 SH_MUTEX_LOCK(mutex_thread_nolog);
4326 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
4327 MSG_FI_NOUSR,
4328 (long) buf.st_uid, tmp2);
4329 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4330 }
4331 SH_FREE(tmp2);
4332 sl_snprintf(theFile->c_owner, USER_MAX+1, "%d", (long) buf.st_uid);
4333 }
4334
4335 /* --- Output the file. ---
4336 */
4337 if (flag_err_debug == S_TRUE)
4338 {
4339 tmp2 = sh_util_safe_name ((filename == NULL) ?
4340 theFile->fullpath : filename);
4341 (void) sh_unix_time(theFile->mtime, timestr, sizeof(timestr));
4342 SH_MUTEX_LOCK(mutex_thread_nolog);
4343 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LIST,
4344 theFile->c_mode,
4345 theFile->hardlinks,
4346 theFile->c_owner,
4347 theFile->c_group,
4348 (unsigned long) theFile->size,
4349 timestr,
4350 tmp2);
4351 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4352 SH_FREE(tmp2);
4353 }
4354
4355 /* --- Check for links. ---
4356 */
4357 if (theFile->c_mode[0] == 'l')
4358 {
4359 linknamebuf = SH_ALLOC(PATH_MAX);
4360
4361 /* flawfinder: ignore */
4362 linksize = readlink (theFile->fullpath, linknamebuf, PATH_MAX-1);
4363
4364 if (linksize < (PATH_MAX-1) && linksize >= 0)
4365 linknamebuf[linksize] = '\0';
4366 else
4367 linknamebuf[PATH_MAX-1] = '\0';
4368
4369 if (linksize < 0)
4370 {
4371 char errbuf[SH_ERRBUF_SIZE];
4372 linksize = errno;
4373 tmp2 = sh_util_safe_name (theFile->fullpath);
4374 SH_MUTEX_LOCK(mutex_thread_nolog);
4375 sh_error_handle (level, FIL__, __LINE__, linksize, MSG_FI_RDLNK,
4376 sh_error_message (linksize, errbuf, sizeof(errbuf)), tmp2);
4377 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4378 SH_FREE(tmp2);
4379 SH_FREE(linknamebuf);
4380 theFile->link_path = sh_util_strdup("-");
4381 SL_RETURN((-1),_("sh_unix_getinfo"));
4382 }
4383
4384 if (linknamebuf[0] == '/')
4385 {
4386 theFile->link_path = sh_util_strdup (linknamebuf);
4387 }
4388 else
4389 {
4390 tmp = sh_util_dirname(theFile->fullpath);
4391 if (tmp) {
4392 theFile->link_path = SH_ALLOC(PATH_MAX);
4393 sl_strlcpy (theFile->link_path, tmp, PATH_MAX);
4394 SH_FREE(tmp);
4395 } else {
4396 theFile->link_path = SH_ALLOC(PATH_MAX);
4397 theFile->link_path[0] = '\0';
4398 }
4399 /*
4400 * Only attach '/' if not root directory. Handle "//", which
4401 * according to POSIX is implementation-defined, and may be
4402 * different from "/" (however, three or more '/' will collapse
4403 * to one).
4404 */
4405 tmp = theFile->link_path; while (*tmp == '/') ++tmp;
4406 if (*tmp != '\0')
4407 {
4408 sl_strlcat (theFile->link_path, "/", PATH_MAX);
4409 }
4410 sl_strlcat (theFile->link_path, linknamebuf, PATH_MAX);
4411 }
4412
4413 /* stat the link
4414 */
4415 stat_return = retry_lstat (FIL__, __LINE__, theFile->link_path, &lbuf);
4416
4417 /* check for error
4418 */
4419 if (stat_return != 0)
4420 {
4421 stat_return = errno;
4422 tmp = sh_util_safe_name (theFile->fullpath);
4423 tmp2 = sh_util_safe_name (theFile->link_path);
4424 if (stat_return != ENOENT)
4425 {
4426 uid_t euid;
4427 char errbuf[SH_ERRBUF_SIZE];
4428
4429 (void) sl_get_euid(&euid);
4430 SH_MUTEX_LOCK(mutex_thread_nolog);
4431 sh_error_handle (level, FIL__, __LINE__, stat_return,
4432 MSG_FI_STAT,
4433 _("lstat (link target)"),
4434 sh_error_message (stat_return,errbuf, sizeof(errbuf)),
4435 (long) euid,
4436 tmp2);
4437 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4438 }
4439 else
4440 {
4441 /* a dangling link -- everybody seems to have plenty of them
4442 */
4443 SH_MUTEX_LOCK(mutex_thread_nolog);
4444 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_DLNK,
4445 tmp, tmp2);
4446 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4447 }
4448 theFile->linkisok = BAD;
4449 SH_FREE(tmp);
4450 SH_FREE(tmp2);
4451 SH_FREE(linknamebuf);
4452 /*
4453 * changed Tue Feb 10 16:16:13 CET 2004:
4454 * add dangling symlinks into database
4455 * SL_RETURN((-1),_("sh_unix_getinfo"));
4456 */
4457 theFile->linkmode = 0;
4458 SL_RETURN((0),_("sh_unix_getinfo"));
4459 }
4460
4461 theFile->linkisok = GOOD;
4462
4463
4464 /* --- Determine file type. ---
4465 */
4466 sh_unix_getinfo_type (&lbuf, &type, theFile->link_c_mode);
4467 theFile->type = type;
4468
4469 /* --- Determine permissions. ---
4470 */
4471 sh_unix_getinfo_mode (&lbuf, &mode, theFile->link_c_mode);
4472 theFile->linkmode = lbuf.st_mode;
4473
4474 /* --- Output the link. ---
4475 */
4476 if (theFile->linkisok == GOOD)
4477 {
4478 tmp2 = sh_util_safe_name (linknamebuf);
4479 SH_MUTEX_LOCK(mutex_thread_nolog);
4480 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LLNK,
4481 theFile->link_c_mode, tmp2);
4482 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4483 SH_FREE(tmp2);
4484 }
4485 SH_FREE(linknamebuf);
4486 }
4487 else /* not a link, theFile->c_mode[0] != 'l' */
4488 {
4489 if (content)
4490 {
4491#ifdef HAVE_LIBZ
4492 unsigned long clen;
4493 unsigned char * compressed;
4494#ifdef HAVE_COMPRESSBOUND
4495 clen = compressBound(sh_string_len(content));
4496#else
4497 if (sh_string_len(content) > 10*SH_TXT_MAX)
4498 clen = SH_TXT_MAX;
4499 else
4500 clen = 13 + (int)(1.0001*sh_string_len(content));
4501#endif
4502 compressed = SH_ALLOC(clen);
4503 if (Z_OK == compress(compressed, &clen,
4504 (unsigned char *) sh_string_str(content),
4505 sh_string_len(content)))
4506 {
4507 if (clen < SH_TXT_MAX)
4508 {
4509 sh_util_base64_enc_alloc (&(theFile->link_path),
4510 (char *) compressed, clen);
4511 }
4512 else
4513 {
4514 char tmsg[128];
4515 char * tpath = sh_util_safe_name (theFile->fullpath);
4516 sl_snprintf(tmsg, sizeof(tmsg),
4517 _("compressed file too large (%lu bytes)"),
4518 clen);
4519 SH_MUTEX_LOCK(mutex_thread_nolog);
4520 sh_error_handle (SH_ERR_WARN, FIL__, __LINE__, -1,
4521 MSG_E_SUBGPATH, tmsg,
4522 _("sh_unix_getinfo"), tpath);
4523 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4524 SH_FREE(tpath);
4525 }
4526 }
4527 SH_FREE(compressed);
4528#endif
4529 sh_string_destroy(&content);
4530 }
4531 }
4532 SL_RETURN((0),_("sh_unix_getinfo"));
4533}
4534
4535/* #if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE) */
4536#endif
4537
4538int sh_unix_unlock(char * lockfile, char * flag)
4539{
4540 int error = 0;
4541
4542 SL_ENTER(_("sh_unix_unlock"));
4543
4544 if (sh.flag.isdaemon == S_FALSE && flag == NULL)
4545 SL_RETURN((0),_("sh_unix_unlock"));
4546
4547 /* --- Logfile is not locked to us. ---
4548 */
4549 if (sh.flag.islocked == BAD && flag != NULL)
4550 SL_RETURN((-1),_("sh_unix_unlock"));
4551
4552 /* --- Check whether the directory is secure. ---
4553 */
4554 if (0 != tf_trust_check (lockfile, SL_YESPRIV))
4555 SL_RETURN((-1),_("sh_unix_unlock"));
4556
4557 /* --- Delete the lock file. ---
4558 */
4559 error = retry_aud_unlink (FIL__, __LINE__, lockfile);
4560
4561 if (error == 0)
4562 {
4563 if (flag != NULL)
4564 sh.flag.islocked = BAD; /* not locked anymore */
4565 }
4566 else if (flag != NULL)
4567 {
4568 char errbuf[SH_ERRBUF_SIZE];
4569 error = errno;
4570 sh_error_handle ((-1), FIL__, __LINE__, error, MSG_E_UNLNK,
4571 sh_error_message(error, errbuf, sizeof(errbuf)),
4572 lockfile);
4573 SL_RETURN((-1),_("sh_unix_unlock"));
4574 }
4575 SL_RETURN((0),_("sh_unix_unlock"));
4576}
4577
4578int sh_unix_check_piddir (char * pidpath)
4579{
4580 static struct stat buf;
4581 int status = 0;
4582 char * pid_dir;
4583
4584 SL_ENTER(_("sh_unix_check_piddir"));
4585
4586 pid_dir = sh_util_dirname (pidpath);
4587
4588 status = retry_lstat (FIL__, __LINE__, pid_dir, &buf);
4589
4590 if (status < 0 && errno == ENOENT)
4591 {
4592 status = mkdir (pid_dir, 0777);
4593 if (status < 0)
4594 {
4595 sh_error_handle ((-1), FIL__, __LINE__, status,
4596 MSG_E_SUBGEN,
4597 _("Cannot create PID directory"),
4598 _("sh_unix_check_piddir"));
4599 SH_FREE(pid_dir);
4600 SL_RETURN((-1),_("sh_unix_check_piddir"));
4601 }
4602 }
4603 else if (!S_ISDIR(buf.st_mode))
4604 {
4605 sh_error_handle ((-1), FIL__, __LINE__, status,
4606 MSG_E_SUBGEN,
4607 _("Path of PID directory refers to a non-directory object"),
4608 _("sh_unix_check_piddir"));
4609 SH_FREE(pid_dir);
4610 SL_RETURN((-1),_("sh_unix_check_piddir"));
4611 }
4612 SH_FREE(pid_dir);
4613 SL_RETURN((0),_("sh_unix_check_piddir"));
4614}
4615
4616int sh_unix_lock (char * lockfile, char * flag)
4617{
4618 int filed;
4619 int errnum;
4620 char myPid[64];
4621 SL_TICKET fd;
4622 extern int get_the_fd (SL_TICKET ticket);
4623
4624 SL_ENTER(_("sh_unix_lock"));
4625
4626 sl_snprintf (myPid, sizeof(myPid), "%ld\n", (long) sh.pid); /* known to fit */
4627
4628 if (flag == NULL) /* PID file, check for directory */
4629 {
4630 if (0 != sh_unix_check_piddir (lockfile))
4631 {
4632 SL_RETURN((-1),_("sh_unix_lock"));
4633 }
4634 }
4635
4636 fd = sl_open_safe_rdwr (FIL__, __LINE__,
4637 lockfile, SL_YESPRIV); /* fails if file exists */
4638
4639 if (!SL_ISERROR(fd))
4640 {
4641 errnum = sl_write (fd, myPid, sl_strlen(myPid));
4642 filed = get_the_fd(fd);
4643 fchmod (filed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
4644 sl_close (fd);
4645
4646 if (!SL_ISERROR(errnum))
4647 {
4648 if (flag != NULL)
4649 sh.flag.islocked = GOOD;
4650 SL_RETURN((0),_("sh_unix_lock"));
4651 }
4652 }
4653
4654 TPT((0, FIL__, __LINE__, _("msg=<open pid file failed>\n")));
4655 if (flag != NULL)
4656 sh.flag.islocked = BAD;
4657 SL_RETURN((-1),_("sh_unix_lock"));
4658
4659 /* notreached */
4660}
4661
4662
4663/* check whether file is locked
4664 */
4665int sh_unix_test_and_lock (char * filename, char * lockfile)
4666{
4667 static struct stat buf;
4668 int status = 0;
4669
4670
4671 SL_TICKET fd;
4672 char line_in[128];
4673
4674 SL_ENTER(_("sh_unix_test_and_lock"));
4675
4676 status = retry_lstat (FIL__, __LINE__, lockfile, &buf);
4677
4678 /* --- No lock file found, try to lock. ---
4679 */
4680
4681 if (status < 0 && errno == ENOENT)
4682 {
4683 if (0 == sh_unix_lock (lockfile, filename))
4684 {
4685 if (filename != NULL)
4686 sh.flag.islocked = GOOD;
4687 SL_RETURN((0),_("sh_unix_test_and_lock"));
4688 }
4689 else
4690 {
4691 sh_error_handle ((-1), FIL__, __LINE__, status,
4692 MSG_E_SUBGEN,
4693 (filename == NULL) ? _("Cannot create PID file (1)") : _("Cannot create lock file (1)"),
4694 _("sh_unix_test_and_lock"));
4695 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4696 }
4697 }
4698 else if (status == 0 && buf.st_size == 0)
4699 {
4700 if (filename != NULL)
4701 sh.flag.islocked = GOOD;
4702 sh_unix_unlock (lockfile, filename);
4703 if (filename != NULL)
4704 sh.flag.islocked = BAD;
4705 if (0 == sh_unix_lock (lockfile, filename))
4706 {
4707 if (filename != NULL)
4708 sh.flag.islocked = GOOD;
4709 SL_RETURN((0),_("sh_unix_test_and_lock"));
4710 }
4711 else
4712 {
4713 sh_error_handle ((-1), FIL__, __LINE__, status,
4714 MSG_E_SUBGEN,
4715 (filename == NULL) ? _("Cannot create PID file (2)") : _("Cannot create lock file (2)"),
4716 _("sh_unix_test_and_lock"));
4717 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4718 }
4719 }
4720
4721 /* --- Check on lock. ---
4722 */
4723
4724 if (status >= 0)
4725 {
4726 fd = sl_open_read (FIL__, __LINE__, lockfile, SL_YESPRIV);
4727 if (SL_ISERROR(fd))
4728 sh_error_handle ((-1), FIL__, __LINE__, fd,
4729 MSG_E_SUBGEN,
4730 (filename == NULL) ? _("Cannot open PID file for read") : _("Cannot open lock file for read"),
4731 _("sh_unix_test_and_lock"));
4732 }
4733 else
4734 fd = -1;
4735
4736 if (!SL_ISERROR(fd))
4737 {
4738 /* read the PID in the lock file
4739 */
4740 status = sl_read (fd, line_in, sizeof(line_in));
4741 line_in[sizeof(line_in)-1] = '\0';
4742
4743 /* convert to numeric
4744 */
4745 if (status > 0)
4746 {
4747 errno = 0;
4748 status = strtol(line_in, (char **)NULL, 10);
4749 if (errno == ERANGE || status <= 0)
4750 {
4751 sh_error_handle ((-1), FIL__, __LINE__, status,
4752 MSG_E_SUBGEN,
4753 (filename == NULL) ? _("Bad PID in PID file") : _("Bad PID in lock file"),
4754 _("sh_unix_test_and_lock"));
4755
4756 status = -1;
4757 }
4758 }
4759 else
4760 {
4761 sh_error_handle ((-1), FIL__, __LINE__, status,
4762 MSG_E_SUBGEN,
4763 (filename == NULL) ? _("Cannot read PID file") : _("Cannot read lock file"),
4764 _("sh_unix_test_and_lock"));
4765 }
4766 sl_close(fd);
4767
4768 if (status > 0 && (unsigned int) status == sh.pid)
4769 {
4770 if (filename != NULL)
4771 sh.flag.islocked = GOOD;
4772 SL_RETURN((0),_("sh_unix_test_and_lock"));
4773 }
4774
4775
4776 /* --- Check whether the process exists. ---
4777 */
4778 if (status > 0)
4779 {
4780 errno = 0;
4781 status = aud_kill (FIL__, __LINE__, status, 0);
4782
4783 /* Does not exist, so remove the stale lock
4784 * and create a new one.
4785 */
4786 if (status < 0 && errno == ESRCH)
4787 {
4788 if (filename != NULL)
4789 sh.flag.islocked = GOOD;
4790 if (0 != sh_unix_unlock(lockfile, filename) && (filename !=NULL))
4791 sh.flag.islocked = BAD;
4792 else
4793 {
4794 if (0 == sh_unix_lock (lockfile, filename))
4795 {
4796 if (filename != NULL)
4797 sh.flag.islocked = GOOD;
4798 SL_RETURN((0),_("sh_unix_test_and_lock"));
4799 }
4800 else
4801 {
4802 sh_error_handle ((-1), FIL__, __LINE__, status,
4803 MSG_E_SUBGEN,
4804 (filename == NULL) ? _("Cannot create PID file (3)") : _("Cannot create lock file (3)"),
4805 _("sh_unix_test_and_lock"));
4806 }
4807 if (filename != NULL)
4808 sh.flag.islocked = BAD;
4809 }
4810 }
4811 else
4812 {
4813 sh_error_handle ((-1), FIL__, __LINE__, status,
4814 MSG_E_SUBGEN,
4815 (filename == NULL) ? _("Cannot remove stale PID file, PID may be a running process") : _("Cannot remove stale lock file, PID may be a running process"),
4816 _("sh_unix_test_and_lock"));
4817 if (filename != NULL)
4818 sh.flag.islocked = BAD;
4819 }
4820 }
4821 }
4822 SL_RETURN((-1),_("sh_unix_testlock"));
4823}
4824
4825/* write the PID file
4826 */
4827int sh_unix_write_pid_file()
4828{
4829 return sh_unix_test_and_lock(NULL, sh.srvlog.alt);
4830}
4831
4832/* write lock for filename
4833 */
4834int sh_unix_write_lock_file(char * filename)
4835{
4836 size_t len;
4837 int res;
4838 char * lockfile;
4839
4840 if (filename == NULL)
4841 return (-1);
4842
4843 len = sl_strlen(filename);
4844 if (sl_ok_adds(len, 6))
4845 len += 6;
4846 lockfile = SH_ALLOC(len);
4847 sl_strlcpy(lockfile, filename, len);
4848 sl_strlcat(lockfile, _(".lock"), len);
4849 res = sh_unix_test_and_lock(filename, lockfile);
4850 SH_FREE(lockfile);
4851 return res;
4852}
4853
4854/* rm lock for filename
4855 */
4856int sh_unix_rm_lock_file(char * filename)
4857{
4858 size_t len;
4859 int res;
4860 char * lockfile;
4861
4862 if (filename == NULL)
4863 return (-1);
4864
4865 len = sl_strlen(filename);
4866 if (sl_ok_adds(len, 6))
4867 len += 6;
4868 lockfile = SH_ALLOC(len);
4869 sl_strlcpy(lockfile, filename, len);
4870 sl_strlcat(lockfile, _(".lock"), len);
4871
4872 res = sh_unix_unlock(lockfile, filename);
4873 SH_FREE(lockfile);
4874 return res;
4875}
4876
4877/* rm lock for filename
4878 */
4879int sh_unix_rm_pid_file()
4880{
4881 return sh_unix_unlock(sh.srvlog.alt, NULL);
4882}
4883
4884/* Test whether file exists
4885 */
4886int sh_unix_file_exists(char * path)
4887{
4888 struct stat buf;
4889
4890 SL_ENTER(_("sh_unix_file_exists"));
4891
4892 if (0 == retry_lstat(FIL__, __LINE__, path, &buf))
4893 SL_RETURN( S_TRUE, _("sh_unix_file_exists"));
4894
4895 SL_RETURN( S_FALSE, _("sh_unix_file_exists"));
4896}
4897
4898
4899/* Test whether file exists, is a character device, and allows read
4900 * access.
4901 */
4902int sh_unix_device_readable(int fd)
4903{
4904 struct stat buf;
4905
4906 SL_ENTER(_("sh_unix_device_readable"));
4907
4908 if (retry_fstat(FIL__, __LINE__, fd, &buf) == -1)
4909 SL_RETURN( (-1), _("sh_unix_device_readable"));
4910 if ( S_ISCHR(buf.st_mode) && 0 != (S_IROTH & buf.st_mode) )
4911 SL_RETURN( (0), _("sh_unix_device_readable"));
4912
4913 SL_RETURN( (-1), _("sh_unix_device_readable"));
4914}
4915
4916static char preq[16];
4917
4918/* return true if database is remote
4919 */
4920int file_is_remote ()
4921{
4922 static int init = 0;
4923 struct stat buf;
4924
4925 SL_ENTER(_("file_is_remote"));
4926
4927 if (init == 0)
4928 {
4929 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4930 ++init;
4931 }
4932 if (0 == sl_strncmp (sh.data.path, preq, 15))
4933 {
4934 if (sh.data.path[15] != '\0') /* should be start of path */
4935 {
4936 if (0 == stat(&(sh.data.path[15]), &buf))
4937 {
4938 SL_RETURN( S_FALSE, _("file_is_remote"));
4939 }
4940 else
4941 {
4942 char * tmp = sh_util_safe_name (&(sh.data.path[15]));
4943 sh_error_handle((-1), FIL__, __LINE__, S_FALSE, MSG_E_SUBGPATH,
4944 _("No local baseline database at expected path"),
4945 _("file_is_remote"),
4946 tmp);
4947 SH_FREE(tmp);
4948 }
4949 }
4950 else
4951 {
4952 sh_error_handle((-1), FIL__, __LINE__, S_FALSE, MSG_E_SUBGEN,
4953 _("No local baseline database path known"),
4954 _("file_is_remote"));
4955 }
4956 SL_RETURN( S_TRUE, _("file_is_remote"));
4957 }
4958 SL_RETURN( S_FALSE, _("file_is_remote"));
4959}
4960
4961/* Return the path to the configuration/database file.
4962 */
4963char * file_path(char what, char flag)
4964{
4965 static int init = 0;
4966
4967 SL_ENTER(_("file_path"));
4968
4969 if (init == 0)
4970 {
4971 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4972 ++init;
4973 }
4974
4975 switch (what)
4976 {
4977
4978 case 'C':
4979 if (0 == sl_strncmp (sh.conf.path, preq, 15))
4980 {
4981#if defined(SH_WITH_SERVER)
4982 if (sh.flag.isserver == S_TRUE && sl_strlen(sh.conf.path) == 15)
4983 SL_RETURN( NULL, _("file_path"));
4984 if (sh.flag.isserver == S_TRUE)
4985 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4986#endif
4987 if (flag == 'R')
4988 SL_RETURN( preq, _("file_path"));
4989 if (flag == 'I')
4990 {
4991 if (sl_strlen(sh.conf.path) == 15)
4992 SL_RETURN( NULL, _("file_path"));
4993 else
4994 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4995 }
4996 SL_RETURN ( preq, _("file_path"));
4997 }
4998 else
4999 SL_RETURN( sh.conf.path, _("file_path"));
5000 /* break; *//* unreachable */
5001
5002 case 'D':
5003 if (0 == sl_strncmp (sh.data.path, preq, 15))
5004 {
5005 if (flag == 'R')
5006 SL_RETURN( preq, _("file_path"));
5007 if (flag == 'W' && sl_strlen(sh.data.path) == 15)
5008 SL_RETURN (NULL, _("file_path"));
5009 if (flag == 'W')
5010 SL_RETURN( &(sh.data.path[15]), _("file_path"));
5011 }
5012 else
5013 SL_RETURN( sh.data.path, _("file_path"));
5014 break;
5015
5016 default:
5017 SL_RETURN( NULL, _("file_path"));
5018 }
5019
5020 return NULL; /* notreached */
5021}
5022/************************************************/
5023/**** Mlock Utilities ****/
5024/************************************************/
5025
5026#include <limits.h>
5027
5028int sh_unix_pagesize()
5029{
5030 int pagesize = 4096;
5031#if defined(_SC_PAGESIZE)
5032 pagesize = sysconf(_SC_PAGESIZE);
5033#elif defined(_SC_PAGE_SIZE)
5034 pagesize = sysconf(_SC_PAGE_SIZE);
5035#elif defined(HAVE_GETPAGESIZE)
5036 pagesize = getpagesize();
5037#elif defined(PAGESIZE)
5038 pagesize = PAGESIZE;
5039#endif
5040
5041 return ((pagesize > 0) ? pagesize : 4096);
5042}
5043
5044typedef struct sh_page_lt {
5045 unsigned long page_start;
5046 int page_refcount;
5047 char file[64];
5048 int line;
5049 struct sh_page_lt * next;
5050} sh_page_l;
5051
5052sh_page_l * sh_page_locked = NULL;
5053volatile int page_locking = 0;
5054
5055unsigned long sh_unix_lookup_page (void * in_addr, size_t len, int * num_pages)
5056{
5057 int pagesize = sh_unix_pagesize();
5058 unsigned long addr = (unsigned long) in_addr;
5059
5060 unsigned long pagebase;
5061 unsigned long pagediff;
5062 unsigned long pagenum = addr / pagesize;
5063
5064 SL_ENTER(_("sh_unix_lookup_page"));
5065#if 0
5066 fprintf(stderr, "mlock: --> base %ld, pagenum: %ld\n",
5067 addr, pagenum);
5068#endif
5069
5070 /* address of first page
5071 */
5072 pagebase = pagenum * pagesize;
5073
5074 /* number of pages
5075 */
5076 pagediff = (addr + len) - pagebase;
5077 pagenum = pagediff / pagesize;
5078 if (pagenum * pagesize < pagediff)
5079 ++pagenum;
5080
5081#if 0
5082 fprintf(stderr, "mlock: --> pagebase %ld, pagediff %ld, (addr + len) %ld\n",
5083 pagebase, pagediff, (addr + len));
5084#endif
5085
5086 *num_pages = pagenum;
5087 SL_RETURN((pagebase), _("sh_unix_lookup_page"));
5088}
5089
5090
5091#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5092
5093SH_MUTEX_STATIC(mutex_mlock,PTHREAD_MUTEX_INITIALIZER);
5094
5095int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
5096{
5097 int num_pages;
5098 int status = 0;
5099 int pagesize;
5100 sh_page_l * page_list;
5101 unsigned long addr;
5102#ifdef TEST_MLOCK
5103 int i = 0;
5104#endif
5105
5106 SL_ENTER(_("sh_unix_mlock"));
5107
5108 /* There's no cancellation point here, except if tracing is on
5109 */
5110 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5111
5112 page_list = sh_page_locked;
5113
5114 if (0 != page_locking)
5115 {
5116 status = -1;
5117 goto exit_mlock;
5118 }
5119
5120 page_locking = 1;
5121
5122 pagesize = sh_unix_pagesize();
5123 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
5124
5125#ifdef TEST_MLOCK
5126 fprintf(stderr, "mlock: addr %ld, base %ld, pages: %d, length %d\n",
5127 (unsigned long) in_addr, addr, num_pages, len);
5128#endif
5129
5130 /* increase refcount of locked pages
5131 * addr is first page; num_pages is #(consecutive pages) to lock
5132 */
5133
5134 while ((page_list != NULL) && (num_pages > 0))
5135 {
5136#ifdef TEST_MLOCK
5137 fprintf(stderr, "mlock: check page %d: %ld [%d]\n",
5138 i, page_list->page_start, page_list->page_refcount);
5139#endif
5140 if (page_list->page_start == addr)
5141 {
5142 page_list->page_refcount += 1;
5143 num_pages -= 1;
5144 addr += pagesize;
5145#ifdef TEST_MLOCK
5146 fprintf(stderr, "mlock: found page %d: %ld [%d], next page %ld\n",
5147 i, page_list->page_start, page_list->page_refcount, addr);
5148#endif
5149 }
5150#ifdef TEST_MLOCK
5151 ++i;
5152#endif
5153 page_list = page_list->next;
5154 }
5155
5156 /* mlock some more pages, if needed
5157 */
5158 while (num_pages > 0)
5159 {
5160#ifdef TEST_MLOCK
5161 fprintf(stderr, "mlock: lock page %d: mlock %ld [num_pages %d]\n",
5162 i, addr, num_pages);
5163 ++i;
5164#endif
5165 page_list = SH_ALLOC(sizeof(sh_page_l));
5166 page_list->page_start = addr;
5167 page_list->page_refcount = 1;
5168 sl_strlcpy(page_list->file, file, 64);
5169 page_list->line = line;
5170 status = mlock( (void *) addr, pagesize);
5171 if (status != 0)
5172 {
5173#ifdef TEST_MLOCK
5174 char errbuf[SH_ERRBUF_SIZE];
5175 fprintf(stderr, "mlock: error: %s\n",
5176 sh_error_message(errno, errbuf, sizeof(errbuf)));
5177#endif
5178 SH_FREE(page_list);
5179 page_locking = 0;
5180 goto exit_mlock;
5181 }
5182 page_list->next = sh_page_locked;
5183 sh_page_locked = page_list;
5184 num_pages -= 1;
5185 addr += pagesize;
5186 }
5187 page_locking = 0;
5188
5189 exit_mlock:
5190 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5191
5192 SL_RETURN((status), _("sh_unix_mlock"));
5193}
5194#else
5195int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
5196{
5197 (void) file; (void) line;
5198 (void) in_addr; (void) len;
5199 return -1;
5200}
5201#endif
5202
5203#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5204int sh_unix_munlock (void * in_addr, size_t len)
5205{
5206 int num_pages;
5207 int unlocked;
5208 int status;
5209 int pagesize;
5210 sh_page_l * page_list;
5211 sh_page_l * page_last;
5212 unsigned long addr;
5213
5214 int test_count;
5215 int test_status;
5216 int test_pages;
5217
5218#ifdef TEST_MLOCK
5219 int i = 0;
5220#endif
5221
5222 SL_ENTER(_("sh_unix_munlock"));
5223
5224 /* There's no cancellation point here, except if tracing is on
5225 */
5226 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5227
5228 unlocked = 0;
5229 status = 0;
5230 page_list = sh_page_locked;
5231
5232 if (0 != page_locking)
5233 {
5234 status = -1;
5235 goto exit_munlock;
5236 }
5237 page_locking = 1;
5238
5239 pagesize = sh_unix_pagesize();
5240 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
5241
5242#ifdef TEST_MLOCK
5243 fprintf(stderr, "munlock: in_addr %ld, addr %ld, pages: %d, length %d\n",
5244 (unsigned long) in_addr, addr, num_pages, len);
5245#endif
5246
5247 test_pages = num_pages;
5248
5249 /* reduce refcount of locked pages
5250 * addr is first page; num_pages is #(consecutive pages) to lock
5251 */
5252 while ((page_list != NULL) && (num_pages > 0))
5253 {
5254#ifdef TEST_MLOCK
5255 fprintf(stderr, "munlock: page %d: %ld [%d]\n",
5256 i, page_list->page_start, page_list->page_refcount);
5257#endif
5258
5259 test_status = 0;
5260 for (test_count = 0; test_count < test_pages; ++test_count)
5261 {
5262 if (page_list->page_start == (addr + (test_count * pagesize)))
5263 {
5264 test_status = 1;
5265 break;
5266 }
5267 }
5268
5269 if (test_status == 1)
5270 {
5271 page_list->page_refcount -= 1;
5272 if (page_list->page_refcount == 0)
5273 {
5274 status = munlock ( (void *) addr, pagesize);
5275 ++unlocked;
5276 }
5277 num_pages -= 1;
5278#ifdef TEST_MLOCK
5279 fprintf(stderr,
5280 "munlock: page %d: %ld [refcount %d], refcount reduced\n",
5281 i, page_list->page_start, page_list->page_refcount);
5282#endif
5283 }
5284#ifdef TEST_MLOCK
5285 ++i;
5286#endif
5287 page_list = page_list->next;
5288 }
5289
5290#ifdef TEST_MLOCK
5291 i = 0;
5292#endif
5293
5294 if (unlocked > 0)
5295 {
5296 page_list = sh_page_locked;
5297 page_last = sh_page_locked;
5298
5299 while ((page_list != NULL) && (unlocked > 0))
5300 {
5301 if (page_list->page_refcount == 0)
5302 {
5303#ifdef TEST_MLOCK
5304 fprintf(stderr, "munlock: remove page %d: %ld [refcount %d]\n",
5305 i, page_list->page_start, page_list->page_refcount);
5306#endif
5307 if (page_last != page_list)
5308 {
5309 page_last->next = page_list->next;
5310 SH_FREE(page_list);
5311 page_list = page_last->next;
5312 }
5313 else
5314 {
5315 page_last = page_list->next;
5316 if (page_list == sh_page_locked)
5317 sh_page_locked = page_list->next;
5318 SH_FREE(page_list);
5319 page_list = page_last;
5320 }
5321 --unlocked;
5322 }
5323 else
5324 {
5325#ifdef TEST_MLOCK
5326 fprintf(stderr, "munlock: skip page %d: %ld [refcount %d]\n",
5327 i, page_list->page_start, page_list->page_refcount);
5328#endif
5329
5330 page_last = page_list;
5331 page_list = page_list->next;
5332 }
5333#ifdef TEST_MLOCK
5334 ++i;
5335#endif
5336 }
5337 }
5338
5339 page_locking = 0;
5340
5341 exit_munlock:
5342 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5343 SL_RETURN((status), _("sh_unix_munlock"));
5344}
5345#else
5346int sh_unix_munlock (void * in_addr, size_t len)
5347{
5348 (void) in_addr; (void) len;
5349 return -1;
5350}
5351#endif
5352
5353int sh_unix_count_mlock()
5354{
5355 unsigned int i = 0;
5356 char str[32][64];
5357 sh_page_l * page_list;
5358
5359 SL_ENTER(_("sh_unix_count_mlock"));
5360
5361#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5362 /* There's no cancellation point here, except if tracing is on
5363 */
5364 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5365#endif
5366
5367 page_list = sh_page_locked;
5368
5369 while (page_list != NULL)
5370 {
5371#ifdef WITH_TPT
5372 if (i < 32)
5373 sl_snprintf(str[i], 64, _("file: %s line: %d page: %d"),
5374 page_list->file, page_list->line, i+1);
5375#endif
5376 page_list = page_list->next;
5377 ++i;
5378 }
5379
5380#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5381 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5382#endif
5383
5384#ifdef WITH_TPT
5385 {
5386 unsigned int j = 0;
5387 while (j < i && j < 32)
5388 {
5389 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, j, MSG_E_SUBGEN,
5390 str[j], _("sh_unix_count_mlock"));
5391 ++j;
5392 }
5393 }
5394#endif
5395
5396 sl_snprintf(str[0], 64, _("%d pages locked"), i);
5397 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, i, MSG_E_SUBGEN,
5398 str[0], _("sh_unix_count_mlock"));
5399 SL_RETURN((i), _("sh_unix_count_mlock"));
5400}
5401
5402/************************************************/
5403/************************************************/
5404/**** Stealth Utilities ****/
5405/************************************************/
5406/************************************************/
5407#ifdef SH_STEALTH
5408
5409void sh_unix_xor_code (char * str, int len)
5410{
5411 register int i;
5412
5413 for (i = 0; i < len; ++i) str[i] ^= (char) XOR_CODE;
5414 return;
5415}
5416
5417#if !defined(SH_STEALTH_MICRO)
5418
5419
5420int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
5421 unsigned long * bytes_read);
5422unsigned long first_hex_block(SL_TICKET fd, unsigned long * max);
5423
5424/*
5425 * --- Get hidden data from a block of hex data. ---
5426 */
5427int sh_unix_getline_stealth (SL_TICKET fd, char * str, int len)
5428{
5429 int add_off = 0, llen;
5430 unsigned long bread;
5431 static unsigned long off_data = 0;
5432 static unsigned long max_data = 0;
5433 static unsigned long bytes_read = 0;
5434 static int stealth_init = BAD;
5435
5436 SL_ENTER(_("sh_unix_getline_stealth"));
5437
5438 if (str == NULL)
5439 {
5440 off_data = 0;
5441 max_data = 0;
5442 bytes_read = 0;
5443 stealth_init = BAD;
5444 SL_RETURN(0, _("sh_unix_getline_stealth"));
5445 }
5446
5447 /* --- Initialize. ---
5448 */
5449 if (stealth_init == BAD)
5450 {
5451 off_data = first_hex_block(fd, &max_data);
5452 if (off_data == 0)
5453 {
5454 dlog(1, FIL__, __LINE__,
5455 _("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"));
5456 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
5457 _("Stealth config file."));
5458 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
5459 }
5460 stealth_init = GOOD;
5461 max_data += off_data;
5462 }
5463
5464 /* --- Seek to proper position. ---
5465 */
5466 if (bytes_read >= max_data || add_off < 0)
5467 {
5468 dlog(1, FIL__, __LINE__,
5469 _("The capacity of the container image file for the stealth config file seems to be too small. Your config file is likely truncated.\n"));
5470 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
5471 _("Stealth config file."));
5472 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
5473 }
5474 sl_seek(fd, off_data);
5475
5476 /* --- Read one line. ---
5477 */
5478 add_off = hideout_hex_block(fd, (unsigned char *) str, len, &bread);
5479 if (add_off > 0)
5480 off_data += add_off;
5481 bytes_read += bread;
5482
5483 if (bread == 0 || add_off <= 0) /* EOF */
5484 str[0] = '\0';
5485
5486 llen = sl_strlen(str);
5487 SL_RETURN(llen, _("sh_unix_getline_stealth"));
5488}
5489
5490int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
5491 unsigned long * bytes_read)
5492{
5493
5494 register int i, j, k;
5495 unsigned char c, e;
5496 register int num;
5497 unsigned char mask[9] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
5498 unsigned long here = 0;
5499 unsigned long retval = 0;
5500 unsigned long bread = 0;
5501
5502 SL_ENTER(_("hideout_hex_block"));
5503
5504 ASSERT_RET((len > 1), _("len > 1"), (0));
5505
5506 str[0] = '\0';
5507 *bytes_read = 0;
5508 --len;
5509
5510 i = 0;
5511 while (i < len)
5512 {
5513 for (j = 0; j < 8; ++j)
5514 {
5515
5516 /* --- Get a low byte, modify, read back. ---
5517 */
5518 for (k = 0; k < 2; ++k)
5519 {
5520 /* -- Skip whitespace. ---
5521 */
5522 c = ' ';
5523 do {
5524 do {
5525 errno = 0;
5526 num = sl_read (fd, &c, 1);
5527 } while (num == 0 && errno == EINTR);
5528 if (num > 0)
5529 ++here;
5530 else if (num == 0) {
5531 SL_RETURN((-1), _("hideout_hex_block"));
5532 }
5533 else {
5534 SL_RETURN((-1), _("hideout_hex_block"));
5535 }
5536 } while (c == '\n' || c == '\t' || c == '\r' ||
5537 c == ' ');
5538 }
5539
5540
5541 /* --- e is the value of the low byte. ---
5542 */
5543 e = (unsigned char) sh_util_hexchar( c );
5544 if ((e & mask[7]) != 0) /* bit is set */
5545 str[i] |= mask[j];
5546 else /* bit is not set */
5547 str[i] &= ~mask[j];
5548
5549 bread += 1;
5550 }
5551 if (str[i] == '\n') break;
5552 ++i;
5553 }
5554
5555 if (i != 0)
5556 str[i] = '\0';
5557 else if (str[0] == '\n')
5558 str[i+1] = '\0'; /* keep newline and terminate */
5559 else
5560 str[0] = '\0';
5561 retval += here;
5562 *bytes_read += (bread/8);
5563
5564 SL_RETURN(retval, _("hideout_hex_block"));
5565}
5566
5567/* --- Get offset of first data block. ---
5568 */
5569unsigned long first_hex_block(SL_TICKET fd, unsigned long * max)
5570{
5571 unsigned int i;
5572 long num = 1;
5573 unsigned long lnum;
5574 char c;
5575 int nothex = 0;
5576 unsigned long retval = 0;
5577 unsigned int this_line = 0;
5578 char theline[SH_BUFSIZE];
5579
5580 SL_ENTER(_("first_hex_block"));
5581
5582 *max = 0;
5583
5584 while (1)
5585 {
5586 theline[0] = '\0';
5587 this_line = 0;
5588 c = '\0';
5589 while (c != '\n' && this_line < (sizeof(theline)-1))
5590 {
5591 do {
5592 num = sl_read (fd, &c, 1);
5593 } while (num == 0 && errno == EINTR);
5594 if (num > 0)
5595 theline[this_line] = c;
5596 else
5597 SL_RETURN((0), _("first_hex_block"));
5598 ++this_line;
5599 }
5600 theline[this_line] = '\0';
5601
5602 /* not only 'newline' */
5603 if (this_line > 60)
5604 {
5605 nothex = 0;
5606 i = 0;
5607 while (nothex == 0 && i < (this_line-1))
5608 {
5609 if (! isxdigit((int)theline[i])) nothex = 1;
5610 ++i;
5611 }
5612 if (nothex == 1) retval += this_line;
5613 }
5614 else
5615 {
5616 nothex = 1;
5617 retval += this_line;
5618 }
5619
5620 if (nothex == 0)
5621 {
5622 *max = 0;
5623 do {
5624 do {
5625 num = sl_read (fd, theline, SH_BUFSIZE);
5626 } while (num == 0 && errno == EINTR);
5627 if (num > 0)
5628 {
5629 lnum = (unsigned long) num;
5630 for (i = 0; i < lnum; ++i)
5631 {
5632 c = theline[i];
5633 if (c == '\n' || c == '\t' || c == '\r' || c == ' ')
5634 ;
5635 else if (!isxdigit((int)c))
5636 break;
5637 else
5638 *max += 1;
5639 }
5640 }
5641 } while (num > 0);
5642
5643 *max /= 16;
5644 SL_RETURN((retval), _("first_hex_block"));
5645 }
5646
5647 }
5648 /* SL_RETURN((0), _("first_hex_block")); *//* unreachable */
5649}
5650
5651 /* if !defined(SH_STEALTH_MICRO) */
5652#endif
5653
5654 /* ifdef SH_STEALTH */
5655#endif
5656
5657/*
5658 * anti-debugger code
5659 */
5660#if defined(SCREW_IT_UP)
5661
5662#if defined(HAVE_PTHREAD)
5663
5664static pthread_key_t gSigtrapVariables_key;
5665static pthread_once_t gSigtrapVariables_key_once = PTHREAD_ONCE_INIT;
5666
5667static inline void make_gSigtrapVariables_key()
5668{
5669 (void) pthread_key_create(&gSigtrapVariables_key, free);
5670}
5671
5672struct sh_sigtrap_variables * sh_sigtrap_variables_get()
5673{
5674 void * ptr;
5675
5676 (void) pthread_once(&gSigtrapVariables_key_once, make_gSigtrapVariables_key);
5677
5678 ptr = pthread_getspecific(gSigtrapVariables_key);
5679 if (ptr == NULL) {
5680 ptr = calloc(1,sizeof(struct sh_sigtrap_variables));
5681 if (ptr == NULL) {
5682 return NULL;
5683 }
5684 (void) pthread_setspecific(gSigtrapVariables_key, ptr);
5685 }
5686
5687 return (struct sh_sigtrap_variables *) ptr;
5688}
5689
5690/* !defined(HAVE_PTHREAD) */
5691#else
5692
5693static struct sh_sigtrap_variables global_sigtrap_variables;
5694struct sh_sigtrap_variables * sh_sigtrap_variables_get()
5695{
5696 return &global_sigtrap_variables;
5697}
5698
5699#endif
5700
5701int sh_sigtrap_max_duration_set (const char * str)
5702{
5703 /* For security (prevent reloading with larger value)
5704 * this value can only be set once.
5705 */
5706 static int once = 0;
5707 int i;
5708
5709 SL_ENTER(_("sh_sigtrap_max_duration_set"));
5710
5711 i = atoi (str);
5712
5713 if (i >= 0 && once == 0)
5714 {
5715 sh.sigtrap_max_duration = i;
5716 once = 1;
5717 }
5718 else
5719 {
5720 SL_RETURN ((-1), _("sh_sigtrap_max_duration_set"));
5721 }
5722 SL_RETURN( (0), _("sh_sigtrap_max_duration_set"));
5723}
5724
5725void sh_sigtrap_handler (int signum)
5726{
5727 struct sh_sigtrap_variables * sigtrap_variables;
5728 sigtrap_variables = sh_sigtrap_variables_get();
5729 if (sigtrap_variables == NULL) {
5730 /* Perhaps, it's better to not die, and to continue using Samhain,
5731 even if this part does not work. */
5732 return;
5733 }
5734
5735#ifdef HAVE_GETTIMEOFDAY
5736 {
5737 struct timeval tv;
5738 long difftv;
5739
5740 gettimeofday(&tv, NULL);
5741 difftv = (tv.tv_sec - sigtrap_variables->save_tv.tv_sec) * 1000000 +
5742 (tv.tv_usec - sigtrap_variables->save_tv.tv_usec);
5743 if (difftv > sh.sigtrap_max_duration)
5744 raise(SIGKILL);
5745 }
5746#endif
5747
5748 sigtrap_variables->not_traced = signum;
5749 /* cppcheck-suppress memleak */
5750 return;
5751}
5752#endif
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