source: trunk/src/sh_unix.c@ 491

Last change on this file since 491 was 488, checked in by katerina, 9 years ago

Fix for tickets #386 (silent check) and #387 (linux audit support).
File size: 132.8 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 dlog(1, FIL__, __LINE__,
989 _("The checksum of the executable: %s has changed since startup (%s -> %s).\n"),
990 sh.exec.path, sh.exec.hash, newhash);
991
992 sl_snprintf(message, 512,
993 _("The checksum of %s has changed since startup (%s -> %s)"),
994 sh.exec.path, sh.exec.hash, newhash);
995 message[511] = '\0';
996
997 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
998 message, _("sh_unix_self_check"));
999 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_E_AUTH,
1000 sh.exec.path);
1001 SL_RETURN((-1), _("sh_unix_self_check"));
1002}
1003
1004
1005/* ---------------------------------------------------------------- */
1006
1007long sh_group_to_gid (const char * g, int * fail)
1008{
1009 struct group * w;
1010 gid_t gid = 0;
1011 int status = 0;
1012
1013#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1014 struct group grp;
1015 char * buffer;
1016 static size_t gbufsize = SH_GRBUF_SIZE;
1017#endif
1018
1019 *fail = -1;
1020
1021 if (g)
1022 {
1023 size_t i;
1024 size_t len = strlen(g);
1025
1026 *fail = 0;
1027
1028 for (i = 0; i < len; ++i)
1029 {
1030 char c = g[i];
1031
1032 if (!isdigit((int) c))
1033 goto is_a_name;
1034 }
1035 return atol(g);
1036
1037 is_a_name:
1038
1039#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1040
1041 buffer = SH_ALLOC(gbufsize);
1042 status = sh_getgrnam_r(g, &grp, buffer, gbufsize, &w);
1043
1044 if ((status == ERANGE) && (w == NULL))
1045 {
1046 if (S_TRUE == sl_ok_adds( gbufsize, SH_GRBUF_SIZE ))
1047 {
1048 SH_FREE(buffer);
1049 gbufsize += SH_GRBUF_SIZE;
1050 goto is_a_name;
1051 }
1052 }
1053
1054#else
1055
1056 errno = 0;
1057 w = sh_getgrnam(g);
1058 status = errno;
1059
1060#endif
1061
1062 if ((status == ERANGE) && (w == NULL))
1063 {
1064 static int seen = 0;
1065
1066 if (seen == 0)
1067 {
1068 char errbuf[SH_ERRBUF_SIZE];
1069
1070 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
1071 sh_error_message(status, errbuf, sizeof(errbuf)),
1072 _("sh_group_to_gid"), (long) -1, _("line too long in group entry"));
1073 ++seen;
1074 }
1075 *fail = -1;
1076 }
1077 else if (w == NULL)
1078 {
1079 char * tmp = sh_util_strdup(g);
1080 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1081 _("sh_group_to_gid"), tmp);
1082 SH_FREE(tmp);
1083 *fail = -1;
1084 }
1085 else
1086 {
1087 gid = w->gr_gid;
1088 }
1089#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1090 SH_FREE(buffer);
1091#endif
1092 }
1093
1094 return gid;
1095}
1096
1097/* ---------------------------------------------------------------- */
1098
1099
1100/* added Tue Feb 22 10:36:44 NFT 2000 Rainer Wichmann */
1101static int tf_add_trusted_user_int(const char * c)
1102{
1103 struct passwd * w;
1104 int count;
1105 uid_t pwid = (uid_t)-1;
1106
1107#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1108 struct passwd pwd;
1109 char * buffer;
1110#endif
1111
1112 SL_ENTER(_("tf_add_trusted_user_int"));
1113
1114 /* First check for a user name.
1115 */
1116#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1117 buffer = SH_ALLOC(SH_PWBUF_SIZE);
1118 sh_getpwnam_r(c, &pwd, buffer, SH_PWBUF_SIZE, &w);
1119#else
1120 w = sh_getpwnam(c);
1121#endif
1122
1123 if ((w != NULL) && ((pwid = w->pw_uid) > 0))
1124 goto succe;
1125
1126 /* Failed, so check for a numerical value.
1127 */
1128 pwid = strtol(c, (char **)NULL, 10);
1129 if (pwid > 0 && pwid < 65535)
1130 goto succe;
1131
1132 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1133 _("add trusted user"), c);
1134#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1135 SH_FREE(buffer);
1136#endif
1137 SL_RETURN((-1), _("tf_add_trusted_user_int"));
1138
1139 succe:
1140 count = sl_trust_add_user(pwid);
1141#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1142 SH_FREE(buffer);
1143#endif
1144 SL_RETURN((count), _("tf_add_trusted_user_int"));
1145}
1146
1147int tf_add_trusted_user(const char * c)
1148{
1149 int i;
1150 char * q;
1151 char * p = sh_util_strdup (c);
1152#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1153 char * saveptr;
1154#endif
1155
1156 SL_ENTER(_("tf_add_trusted_user"));
1157
1158#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1159 q = strtok_r(p, ", \t", &saveptr);
1160#else
1161 q = strtok(p, ", \t");
1162#endif
1163 if (!q)
1164 {
1165 SH_FREE(p);
1166 SL_RETURN((-1), _("tf_add_trusted_user"));
1167 }
1168 while (q)
1169 {
1170 i = tf_add_trusted_user_int(q);
1171 if (SL_ISERROR(i))
1172 {
1173 SH_FREE(p);
1174 SL_RETURN((i), _("tf_add_trusted_user"));
1175 }
1176#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1177 q = strtok_r(NULL, ", \t", &saveptr);
1178#else
1179 q = strtok(NULL, ", \t");
1180#endif
1181 }
1182 SH_FREE(p);
1183 SL_RETURN((0), _("tf_add_trusted_user"));
1184}
1185
1186extern uid_t sl_trust_baduid(void);
1187extern gid_t sl_trust_badgid(void);
1188
1189#if defined(HOST_IS_CYGWIN) || defined(__cygwin__) || defined(__CYGWIN32__) || defined(__CYGWIN__)
1190int tf_trust_check (const char * file, int mode)
1191{
1192 (void) file;
1193 (void) mode;
1194 return 0;
1195}
1196#else
1197int tf_trust_check (const char * file, int mode)
1198{
1199 char * tmp;
1200 char * tmp2;
1201 char * p;
1202 int status;
1203 int level;
1204 uid_t ff_euid = (uid_t) -1;
1205
1206 SL_ENTER(_("tf_trust_check"));
1207
1208 if (mode == SL_YESPRIV)
1209 sl_get_euid(&ff_euid);
1210 else
1211 sl_get_ruid(&ff_euid);
1212
1213#if defined(SH_WITH_SERVER)
1214 if (0 == sl_ret_euid()) /* privileges not dropped yet */
1215 {
1216#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1217 struct passwd pwd;
1218 char * buffer = SH_ALLOC(SH_PWBUF_SIZE);
1219 struct passwd * tempres;
1220 sh_getpwnam_r(DEFAULT_IDENT, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
1221#else
1222 struct passwd * tempres = sh_getpwnam(DEFAULT_IDENT);
1223#endif
1224
1225 if (!tempres)
1226 {
1227 dlog(1, FIL__, __LINE__,
1228 _("User %s does not exist. Please add the user to your system.\n"),
1229 DEFAULT_IDENT);
1230 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
1231 }
1232 else
1233 {
1234 ff_euid = tempres->pw_uid;
1235 }
1236#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1237 SH_FREE(buffer);
1238#endif
1239 }
1240#endif
1241
1242 status = sl_trustfile_euid(file, ff_euid);
1243
1244 if ( SL_ENONE != status)
1245 {
1246 if (status == SL_ESTAT)
1247 level = SH_ERR_ALL;
1248 else
1249 level = SH_ERR_ERR;
1250
1251 tmp = sh_util_safe_name (file);
1252 p = sl_trust_errfile();
1253 if (p && *p != '\0')
1254 {
1255 tmp2 = sh_util_safe_name (sl_trust_errfile());
1256 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST2,
1257 sl_error_string(status), tmp, tmp2);
1258 SH_FREE(tmp2);
1259 }
1260 else
1261 {
1262 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST1,
1263 sl_error_string(status), tmp);
1264 }
1265 SH_FREE(tmp);
1266
1267 if (status == SL_EBADUID || status == SL_EBADGID ||
1268 status == SL_EBADOTH || status == SL_ETRUNC ||
1269 status == SL_EINTERNAL )
1270 {
1271 switch (status) {
1272 case SL_EINTERNAL:
1273 dlog(1, FIL__, __LINE__,
1274 _("An internal error occured in the trustfile function.\n"));
1275 break;
1276 case SL_ETRUNC:
1277 tmp = sh_util_safe_name (file);
1278 dlog(1, FIL__, __LINE__,
1279 _("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"),
1280 tmp);
1281 SH_FREE(tmp);
1282 break;
1283 case SL_EBADOTH:
1284 tmp = sh_util_safe_name (file);
1285 p = sl_trust_errfile();
1286 dlog(1, FIL__, __LINE__,
1287 _("The path element: %s\nin the filename: %s is world writeable.\n"),
1288 p, tmp);
1289 SH_FREE(tmp);
1290 break;
1291 case SL_EBADUID:
1292 tmp = sh_util_safe_name (file);
1293 p = sl_trust_errfile();
1294 dlog(1, FIL__, __LINE__,
1295 _("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"),
1296 (UID_CAST)sl_trust_baduid(), p, tmp);
1297 SH_FREE(tmp);
1298 break;
1299 case SL_EBADGID:
1300 tmp = sh_util_safe_name (file);
1301 p = sl_trust_errfile();
1302 dlog(1, FIL__, __LINE__,
1303 _("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"),
1304 p, tmp, (UID_CAST)sl_trust_badgid(),
1305 (UID_CAST)sl_trust_baduid());
1306 SH_FREE(tmp);
1307 break;
1308 default:
1309 break;
1310 }
1311
1312 SL_RETURN((-1), _("tf_trust_check"));
1313 }
1314 }
1315
1316 SL_RETURN((0), _("tf_trust_check"));
1317}
1318#endif
1319
1320#ifdef HAVE_INITGROUPS
1321#ifdef HOST_IS_OSF
1322int sh_unix_initgroups ( char * in_user, gid_t in_gid)
1323#else
1324int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1325#endif
1326{
1327 int status = -1;
1328 status = sh_initgroups (in_user, in_gid);
1329 if (status < 0)
1330 {
1331 if (errno == EPERM)
1332 return 0;
1333 if (errno == EINVAL)
1334 return 0;
1335 return -1;
1336 }
1337 return 0;
1338}
1339#else
1340int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1341{
1342 (void) in_user;
1343 (void) in_gid;
1344 return 0;
1345}
1346#endif
1347
1348#ifdef HAVE_INITGROUPS
1349char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len);
1350int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1351{
1352 int status = -1;
1353 char user[SH_MINIBUF];
1354
1355 SL_ENTER(_("sh_unix_initgroups2"));
1356
1357 if (NULL == sh_unix_getUIDname (SH_ERR_ERR, in_pid, user, sizeof(user)))
1358 SL_RETURN((-1), _("sh_unix_initgroups2"));
1359 status = sh_initgroups (user, in_gid);
1360 if (status < 0)
1361 {
1362 if (errno == EPERM)
1363 status = 0;
1364 if (errno == EINVAL)
1365 status = 0;
1366 }
1367 SL_RETURN((status), _("sh_unix_initgroups2"));
1368}
1369#else
1370int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1371{
1372 (void) in_pid;
1373 (void) in_gid;
1374 return 0;
1375}
1376#endif
1377
1378void sh_unix_closeall (int fd, int except, int inchild)
1379{
1380 int fdx = fd;
1381#ifdef _SC_OPEN_MAX
1382 int fdlimit = sysconf (_SC_OPEN_MAX);
1383#else
1384#ifdef OPEN_MAX
1385 int fdlimit = OPEN_MAX;
1386#else
1387 int fdlimit = _POSIX_OPEN_MAX;
1388#endif
1389#endif
1390
1391 SL_ENTER(_("sh_unix_closeall"));
1392
1393 /* can't happen - so fix it :-(
1394 */
1395 if (fdlimit < 0)
1396 fdlimit = 20; /* POSIX lower limit */
1397
1398 if (fdlimit > 65536)
1399 fdlimit = 65536;
1400
1401 if (!inchild)
1402 sl_dropall (fdx, except);
1403 else
1404 sl_dropall_dirty (fdx, except);
1405
1406 /* Close everything from fd (inclusive) up to fdlimit (exclusive).
1407 */
1408 while (fd < fdlimit)
1409 {
1410 if (fd == except)
1411 fd++;
1412 else if (slib_do_trace != 0 && fd == slib_trace_fd)
1413 fd++;
1414 else
1415 sl_close_fd(FIL__, __LINE__, fd++);
1416 }
1417
1418 SL_RET0(_("sh_unix_closeall"));
1419}
1420
1421static void sh_unix_setlimits(void)
1422{
1423 struct rlimit limits;
1424
1425 SL_ENTER(_("sh_unix_setlimits"));
1426
1427 limits.rlim_cur = RLIM_INFINITY;
1428 limits.rlim_max = RLIM_INFINITY;
1429
1430#ifdef RLIMIT_CPU
1431 setrlimit (RLIMIT_CPU, &limits);
1432#endif
1433#ifdef RLIMIT_FSIZE
1434 setrlimit (RLIMIT_FSIZE, &limits);
1435#endif
1436#ifdef RLIMIT_DATA
1437 setrlimit (RLIMIT_DATA, &limits);
1438#endif
1439#ifdef RLIMIT_STACK
1440 setrlimit (RLIMIT_STACK, &limits);
1441#endif
1442#ifdef RLIMIT_RSS
1443 setrlimit (RLIMIT_RSS, &limits);
1444#endif
1445#ifdef RLIMIT_NPROC
1446 setrlimit (RLIMIT_NPROC, &limits);
1447#endif
1448#ifdef RLIMIT_MEMLOCK
1449 setrlimit (RLIMIT_MEMLOCK, &limits);
1450#endif
1451
1452#if !defined(SL_DEBUG)
1453 /* no core dumps
1454 */
1455 limits.rlim_cur = 0;
1456 limits.rlim_max = 0;
1457#ifdef RLIMIT_CORE
1458 setrlimit (RLIMIT_CORE, &limits);
1459#endif
1460#else
1461#ifdef RLIMIT_CORE
1462 setrlimit (RLIMIT_CORE, &limits);
1463#endif
1464#endif
1465
1466 limits.rlim_cur = 1024;
1467 limits.rlim_max = 1024;
1468
1469#if defined(RLIMIT_NOFILE)
1470 setrlimit (RLIMIT_NOFILE, &limits);
1471#elif defined(RLIMIT_OFILE)
1472 setrlimit (RLIMIT_OFILE, &limits);
1473#endif
1474
1475 SL_RET0(_("sh_unix_setlimits"));
1476}
1477
1478static void sh_unix_copyenv(void)
1479{
1480 char ** env0 = environ;
1481 char ** env1;
1482 int envlen = 0;
1483 size_t len;
1484
1485 SL_ENTER(_("sh_unix_copyenv"));
1486
1487 while (env0 != NULL && env0[envlen] != NULL) {
1488 /* printf("%2d: %s\n", envlen, env0[envlen]); */
1489 ++envlen;
1490 }
1491 ++envlen;
1492
1493 /* printf("-> %2d: slots allocated\n", envlen); */
1494 env1 = calloc(1,sizeof(char *) * envlen); /* only once */
1495 if (env1 == NULL)
1496 {
1497 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1498 SL_RET0(_("sh_unix_copyenv"));
1499 }
1500 env0 = environ;
1501 envlen = 0;
1502
1503 while (env0 != NULL && env0[envlen] != NULL) {
1504 len = strlen(env0[envlen]) + 1;
1505 env1[envlen] = calloc(1,len); /* only once */
1506 if (env1[envlen] == NULL)
1507 {
1508 int i;
1509 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1510 for (i = 0; i < envlen; ++i) free(env1[len]);
1511 free(env1);
1512 SL_RET0(_("sh_unix_copyenv"));
1513 }
1514 sl_strlcpy(env1[envlen], env0[envlen], len);
1515 ++envlen;
1516 }
1517 env1[envlen] = NULL;
1518
1519 environ = env1;
1520 SL_RET0(_("sh_unix_copyenv"));
1521}
1522
1523/* delete all environment variables
1524 */
1525static void sh_unix_zeroenv(void)
1526{
1527 char * c;
1528 char ** env;
1529
1530 SL_ENTER(_("sh_unix_zeroenv"));
1531
1532 sh_unix_copyenv();
1533 env = environ;
1534
1535 while (env != NULL && *env != NULL) {
1536 c = strchr ((*env), '=');
1537#ifdef WITH_MYSQL
1538 /*
1539 * Skip the MYSQL_UNIX_PORT environment variable; MySQL may need it.
1540 */
1541 if (0 == sl_strncmp((*env), _("MYSQL_UNIX_PORT="), 16))
1542 {
1543 ++(env);
1544 continue;
1545 }
1546 if (0 == sl_strncmp((*env), _("MYSQL_TCP_PORT="), 15))
1547 {
1548 ++(env);
1549 continue;
1550 }
1551 if (0 == sl_strncmp((*env), _("MYSQL_HOME="), 11))
1552 {
1553 ++(env);
1554 continue;
1555 }
1556#endif
1557#ifdef WITH_ORACLE
1558 /*
1559 * Skip the ORACLE_HOME and TNS_ADMIN environment variables;
1560 * Oracle may need them.
1561 */
1562 if (0 == sl_strncmp((*env), _("ORACLE_HOME="), 12))
1563 {
1564 ++(env);
1565 continue;
1566 }
1567 if (0 == sl_strncmp((*env), _("TNS_ADMIN="), 10))
1568 {
1569 ++(env);
1570 continue;
1571 }
1572#endif
1573 /*
1574 * Skip the TZ environment variable.
1575 */
1576 if (0 == sl_strncmp((*env), _("TZ="), 3))
1577 {
1578 ++(env);
1579 continue;
1580 }
1581 ++(env);
1582 if (c != NULL)
1583 {
1584 ++c;
1585 while ((*c) != '\0') {
1586 (*c) = '\0';
1587 ++c;
1588 }
1589 }
1590 }
1591
1592#ifdef HAVE_TZSET
1593 tzset();
1594#endif
1595
1596 SL_RET0(_("sh_unix_zeroenv"));
1597}
1598
1599
1600static void sh_unix_resettimer(void)
1601{
1602 struct itimerval this_timer;
1603
1604 SL_ENTER(_("sh_unix_resettimer"));
1605
1606 this_timer.it_value.tv_sec = 0;
1607 this_timer.it_value.tv_usec = 0;
1608
1609 this_timer.it_interval.tv_sec = 0;
1610 this_timer.it_interval.tv_usec = 0;
1611
1612 setitimer(ITIMER_REAL, &this_timer, NULL);
1613#if !defined(SH_PROFILE)
1614 setitimer(ITIMER_VIRTUAL, &this_timer, NULL);
1615 setitimer(ITIMER_PROF, &this_timer, NULL);
1616#endif
1617
1618 SL_RET0(_("sh_unix_resettimer"));
1619}
1620
1621static void sh_unix_resetsignals(void)
1622{
1623 int sig_num;
1624#ifdef NSIG
1625 int max_sig = NSIG;
1626#else
1627 int max_sig = 255;
1628#endif
1629 int test;
1630 int status;
1631 struct sigaction act;
1632#if !defined(SH_PROFILE)
1633 struct sigaction oldact;
1634#endif
1635
1636 sigset_t set_proc;
1637
1638 SL_ENTER(_("sh_unix_resetsignals"));
1639 /*
1640 * Reset the current signal mask (inherited from parent process).
1641 */
1642
1643 sigfillset(&set_proc);
1644
1645 do {
1646 errno = 0;
1647 test = SH_SETSIGMASK(SIG_UNBLOCK, &set_proc, NULL);
1648 } while (test < 0 && errno == EINTR);
1649
1650 /*
1651 * Reset signal handling.
1652 */
1653
1654 act.sa_handler = SIG_DFL; /* signal action */
1655 sigemptyset( &act.sa_mask ); /* set an empty mask */
1656 act.sa_flags = 0; /* init sa_flags */
1657
1658 for (sig_num = 1; sig_num <= max_sig; ++sig_num)
1659 {
1660#if !defined(SH_PROFILE)
1661 test = retry_sigaction(FIL__, __LINE__, sig_num, &act, &oldact);
1662#else
1663 test = 0;
1664#endif
1665 if ((test == -1) && (errno != EINVAL))
1666 {
1667 char errbuf[SH_ERRBUF_SIZE];
1668 status = errno;
1669 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_SIG,
1670 sh_error_message (status, errbuf, sizeof(errbuf)), sig_num);
1671 }
1672 }
1673
1674 SL_RET0(_("sh_unix_resetsignals"));
1675}
1676
1677/* Get the local hostname (FQDN)
1678 */
1679static char * sh_tolower (char * s)
1680{
1681 char * ret = s;
1682 if (s)
1683 {
1684 for (; *s; ++s)
1685 {
1686 *s = tolower((unsigned char) *s);
1687 }
1688 }
1689 return ret;
1690}
1691
1692
1693#include <sys/socket.h>
1694
1695/* Required for BSD
1696 */
1697#ifdef HAVE_NETINET_IN_H
1698#include <netinet/in.h>
1699#endif
1700
1701#include <arpa/inet.h>
1702
1703const char * sh_unix_h_name (struct hostent * host_entry)
1704{
1705 char ** p;
1706 if (strchr(host_entry->h_name, '.')) {
1707 return host_entry->h_name;
1708 } else {
1709 for (p = host_entry->h_aliases; *p; ++p) {
1710 if (strchr(*p, '.'))
1711 return *p;
1712 }
1713 }
1714 return host_entry->h_name;
1715}
1716
1717/* uname() on FreeBSD is broken, because the 'nodename' buf is too small
1718 * to hold a valid (leftmost) domain label.
1719 */
1720#if defined(HAVE_UNAME) && !defined(HOST_IS_FREEBSD)
1721#include <sys/utsname.h>
1722void sh_unix_localhost()
1723{
1724 struct utsname buf;
1725 int i;
1726 unsigned int ddot;
1727 int len;
1728 char * p;
1729 char hostname[256];
1730 char numeric[SH_IP_BUF];
1731 char * canonical;
1732
1733
1734 SL_ENTER(_("sh_unix_localhost"));
1735
1736 (void) uname (&buf);
1737 /* flawfinder: ignore */ /* ff bug, ff sees system() */
1738 sl_strlcpy (sh.host.system, buf.sysname, SH_MINIBUF);
1739 sl_strlcpy (sh.host.release, buf.release, SH_MINIBUF);
1740 sl_strlcpy (sh.host.machine, buf.machine, SH_MINIBUF);
1741
1742 /* Workaround for cases where nodename could be
1743 * a truncated FQDN.
1744 */
1745 if (strlen(buf.nodename) == (sizeof(buf.nodename)-1))
1746 {
1747 p = strchr(buf.nodename, '.');
1748 if (NULL != p) {
1749 *p = '\0';
1750 sl_strlcpy(hostname, buf.nodename, 256);
1751 } else {
1752#ifdef HAVE_GETHOSTNAME
1753 if (0 != gethostname(hostname, 256))
1754 {
1755 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1756 _("nodename returned by uname may be truncated"),
1757 _("sh_unix_localhost"));
1758 sl_strlcpy (hostname, buf.nodename, 256);
1759 }
1760 else
1761 {
1762 hostname[255] = '\0';
1763 }
1764#else
1765 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1766 _("nodename returned by uname may be truncated"),
1767 _("sh_unix_localhost"));
1768 sl_strlcpy(hostname, buf.nodename, 256);
1769#endif
1770 }
1771 }
1772 else
1773 {
1774 sl_strlcpy(hostname, buf.nodename, 256);
1775 }
1776
1777 canonical = sh_ipvx_canonical(hostname, numeric, sizeof(numeric));
1778
1779 if (canonical == NULL)
1780 {
1781 sl_strlcpy (sh.host.name, hostname, SH_PATHBUF);
1782 sh_tolower (sh.host.name);
1783 }
1784 else
1785 {
1786 sl_strlcpy (sh.host.name, canonical, SH_PATHBUF);
1787 SH_FREE(canonical);
1788 }
1789
1790 /* check whether it looks like a FQDN
1791 */
1792 len = sl_strlen(sh.host.name);
1793 ddot = 0;
1794 for (i = 0; i < len; ++i)
1795 if (sh.host.name[i] == '.') ++ddot;
1796
1797 if (ddot == 0)
1798 {
1799 dlog(1, FIL__, __LINE__,
1800 _("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"),
1801 hostname, sh.host.name);
1802 sl_strlcpy (sh.host.name, numeric, SH_PATHBUF);
1803 SL_RET0(_("sh_unix_localhost"));
1804 }
1805
1806 if (sh_ipvx_is_numeric(sh.host.name))
1807 {
1808 dlog(1, FIL__, __LINE__,
1809 _("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"),
1810 hostname, sh.host.name);
1811 }
1812
1813 SL_RET0(_("sh_unix_localhost"));
1814}
1815
1816#else
1817
1818/*
1819 * --FreeBSD code
1820 */
1821#if defined(HAVE_UNAME)
1822#include <sys/utsname.h>
1823#endif
1824void sh_unix_localhost()
1825{
1826#if defined(HAVE_UNAME)
1827 struct utsname buf;
1828#endif
1829 int i;
1830 int ddot;
1831 int len;
1832 char hostname[1024];
1833 char numeric[SH_IP_BUF];
1834 char * canonical;
1835
1836 SL_ENTER(_("sh_unix_localhost"));
1837
1838#if defined(HAVE_UNAME)
1839 (void) uname (&buf);
1840 /* flawfinder: ignore */ /* ff bug, ff sees system() */
1841 sl_strlcpy (sh.host.system, buf.sysname, SH_MINIBUF);
1842 sl_strlcpy (sh.host.release, buf.release, SH_MINIBUF);
1843 sl_strlcpy (sh.host.machine, buf.machine, SH_MINIBUF);
1844#endif
1845
1846 (void) gethostname (hostname, 1024);
1847 hostname[1023] = '\0';
1848
1849 canonical = sh_ipvx_canonical(hostname, numeric, sizeof(numeric));
1850
1851 if (canonical == NULL)
1852 {
1853 sl_strlcpy (sh.host.name, hostname, SH_PATHBUF);
1854 sh_tolower (sh.host.name);
1855 }
1856 else
1857 {
1858 sl_strlcpy (sh.host.name, canonical, SH_PATHBUF);
1859 SH_FREE(canonical);
1860 }
1861
1862 /* check whether it looks like a FQDN
1863 */
1864 len = sl_strlen(sh.host.name);
1865 ddot = 0;
1866 for (i = 0; i < len; ++i)
1867 if (sh.host.name[i] == '.') ++ddot;
1868 if (ddot == 0)
1869 {
1870 dlog(1, FIL__, __LINE__,
1871 _("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"),
1872 hostname, sh.host.name);
1873 sl_strlcpy (sh.host.name, numeric, SH_PATHBUF);
1874 SL_RET0(_("sh_unix_localhost"));
1875 }
1876
1877 if (sh_ipvx_is_numeric(sh.host.name))
1878 {
1879 dlog(1, FIL__, __LINE__,
1880 _("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"),
1881 hostname, sh.host.name);
1882 }
1883
1884 SL_RET0(_("sh_unix_localhost"));
1885}
1886#endif
1887
1888
1889void sh_unix_memlock()
1890{
1891 SL_ENTER(_("sh_unix_memlock"));
1892
1893 /* do this before dropping privileges
1894 */
1895#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
1896 if (skey->mlock_failed == S_FALSE)
1897 {
1898 if ( (-1) == sh_unix_mlock( FIL__, __LINE__,
1899 (char *) skey, sizeof (sh_key_t)) )
1900 {
1901 SH_MUTEX_LOCK_UNSAFE(mutex_skey);
1902 skey->mlock_failed = S_TRUE;
1903 SH_MUTEX_UNLOCK_UNSAFE(mutex_skey);
1904 }
1905 }
1906#else
1907 if (skey->mlock_failed == S_FALSE)
1908 {
1909 SH_MUTEX_LOCK_UNSAFE(mutex_skey);
1910 skey->mlock_failed = S_TRUE;
1911 SH_MUTEX_UNLOCK_UNSAFE(mutex_skey);
1912 }
1913#endif
1914
1915 SL_RET0(_("sh_unix_memlock"));
1916}
1917
1918#ifdef SH_WITH_SERVER
1919char * chroot_dir = NULL;
1920
1921int sh_unix_set_chroot(const char * str)
1922{
1923 size_t len;
1924 static int block = 0;
1925
1926 if (block == 1)
1927 return 0;
1928
1929 if (str && *str == '/')
1930 {
1931 len = strlen(str) + 1;
1932 chroot_dir = calloc(1,strlen(str) + 1); /* only once */
1933 if (!chroot_dir)
1934 {
1935 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1936 return 1;
1937 }
1938 sl_strlcpy(chroot_dir, str, len);
1939 block = 1;
1940 return 0;
1941 }
1942 return 1;
1943}
1944
1945int sh_unix_chroot(void)
1946{
1947 int status;
1948
1949 if (chroot_dir != NULL)
1950 {
1951 status = retry_aud_chdir(FIL__, __LINE__, chroot_dir);
1952 if ( (-1) == status )
1953 {
1954 char errbuf[SH_ERRBUF_SIZE];
1955 status = errno;
1956 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
1957 sh_error_message (status, errbuf, sizeof(errbuf)), chroot_dir);
1958 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1959 }
1960 /* flawfinder: ignore */
1961 return (chroot(chroot_dir));
1962 }
1963 return 0;
1964}
1965/* #ifdef SH_WITH_SERVER */
1966#else
1967int sh_unix_chroot(void) { return 0; }
1968#endif
1969
1970/* daemon mode
1971 */
1972static int block_setdeamon = 0;
1973
1974int sh_unix_setdeamon(const char * dummy)
1975{
1976 int res = 0;
1977
1978 SL_ENTER(_("sh_unix_setdeamon"));
1979
1980 if (block_setdeamon != 0)
1981 SL_RETURN((0),_("sh_unix_setdeamon"));
1982
1983 if (dummy == NULL)
1984 sh.flag.isdaemon = S_TRUE;
1985 else
1986 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
1987
1988 if (sh.flag.opts == S_TRUE)
1989 block_setdeamon = 1;
1990
1991 SL_RETURN(res, _("sh_unix_setdeamon"));
1992}
1993#if defined(HAVE_LIBPRELUDE)
1994#include "sh_prelude.h"
1995#endif
1996
1997int sh_unix_setnodeamon(const char * dummy)
1998{
1999 int res = 0;
2000
2001 SL_ENTER(_("sh_unix_setnodeamon"));
2002
2003 if (block_setdeamon != 0)
2004 SL_RETURN((0),_("sh_unix_setmodeamon"));
2005
2006 if (dummy == NULL)
2007 sh.flag.isdaemon = S_FALSE;
2008 else
2009 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
2010
2011 if (sh.flag.opts == S_TRUE)
2012 block_setdeamon = 1;
2013
2014 SL_RETURN(res, _("sh_unix_setnodeamon"));
2015}
2016
2017int sh_unix_init(int goDaemon)
2018{
2019 int status;
2020 uid_t uid;
2021 pid_t oldpid = getpid();
2022#if defined(SH_WITH_SERVER)
2023 extern int sh_socket_open_int (void);
2024#endif
2025 char errbuf[SH_ERRBUF_SIZE];
2026
2027 extern void sh_kill_sub();
2028
2029 SL_ENTER(_("sh_unix_init"));
2030
2031 /* fork twice, exit the parent process
2032 */
2033 if (goDaemon == 1) {
2034
2035 switch (aud_fork(FIL__, __LINE__)) {
2036 case 0: break; /* child process continues */
2037 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
2038 default: /* parent process exits */
2039 sh_kill_sub();
2040 aud__exit(FIL__, __LINE__, 0);
2041 }
2042
2043 /* Child processes do not inherit page locks across a fork.
2044 * Error in next fork would return in this (?) thread of execution.
2045 */
2046 sh_unix_memlock();
2047
2048 setsid(); /* should not fail */
2049 sh.pid = (UINT64) getpid();
2050
2051 switch (aud_fork(FIL__, __LINE__)) {
2052 case 0: break; /* child process continues */
2053 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
2054 default: /* parent process exits */
2055 sh_kill_sub();
2056 aud__exit(FIL__, __LINE__, 0);
2057 }
2058
2059 /* Child processes do not inherit page locks across a fork.
2060 */
2061 sh_unix_memlock();
2062 sh.pid = (UINT64) getpid();
2063
2064 } else {
2065 setsid(); /* should not fail */
2066 }
2067
2068 /* set working directory
2069 */
2070#ifdef SH_PROFILE
2071 status = 0;
2072#else
2073 status = retry_aud_chdir(FIL__, __LINE__, "/");
2074#endif
2075 if ( (-1) == status )
2076 {
2077 status = errno;
2078 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
2079 sh_error_message (status, errbuf, sizeof(errbuf)), "/");
2080 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2081 }
2082
2083 /* reset timers
2084 */
2085 sh_unix_resettimer();
2086
2087 /* signal handlers
2088 */
2089 sh_unix_resetsignals();
2090#if defined(SCREW_IT_UP)
2091 sh_sigtrap_prepare();
2092#endif
2093 sh_unix_siginstall (goDaemon);
2094
2095 /* set file creation mask
2096 */
2097 (void) umask (0); /* should not fail */
2098
2099 /* set resource limits to maximum, and
2100 * core dump size to zero
2101 */
2102 sh_unix_setlimits();
2103
2104 /* zero out the environment (like PATH='\0')
2105 */
2106 sh_unix_zeroenv();
2107
2108 if (goDaemon == 1)
2109 {
2110 /* Close first tree file descriptors
2111 */
2112 sl_close_fd (FIL__, __LINE__, 0); /* if running as daemon */
2113 sl_close_fd (FIL__, __LINE__, 1); /* if running as daemon */
2114 sl_close_fd (FIL__, __LINE__, 2); /* if running as daemon */
2115
2116 /* Enable full error logging
2117 */
2118 sh_error_only_stderr (S_FALSE);
2119
2120 /* open first three streams to /dev/null
2121 */
2122 status = aud_open(FIL__, __LINE__, SL_NOPRIV, _("/dev/null"), O_RDWR, 0);
2123 if (status < 0)
2124 {
2125 status = errno;
2126 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2127 sh_error_message(status, errbuf, sizeof(errbuf)), _("open"));
2128 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2129 }
2130
2131 status = retry_aud_dup(FIL__, __LINE__, 0);
2132 if (status >= 0)
2133 retry_aud_dup(FIL__, __LINE__, 0);
2134
2135 if (status < 0)
2136 {
2137 status = errno;
2138 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2139 sh_error_message(status, errbuf, sizeof(errbuf)), _("dup"));
2140 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2141 }
2142
2143 sh_error_enable_unsafe (S_TRUE);
2144#if defined(HAVE_LIBPRELUDE)
2145 sh_prelude_reset ();
2146#endif
2147
2148 /* --- wait until parent has exited ---
2149 */
2150 while (1 == 1)
2151 {
2152 errno = 0;
2153 if (0 > aud_kill (FIL__, __LINE__, oldpid, 0) && errno == ESRCH)
2154 {
2155 break;
2156 }
2157 retry_msleep(0, 1);
2158 }
2159
2160 /* write PID file
2161 */
2162 status = sh_unix_write_pid_file();
2163 if (status < 0)
2164 {
2165 sl_get_euid(&uid);
2166 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_PIDFILE,
2167 (long) uid, sh.srvlog.alt);
2168 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2169 }
2170#if defined(SH_WITH_SERVER)
2171 sh_socket_open_int ();
2172#endif
2173 }
2174 else
2175 {
2176 sh_error_enable_unsafe (S_TRUE);
2177#if defined(HAVE_LIBPRELUDE)
2178 sh_prelude_reset ();
2179#endif
2180#if defined(SH_WITH_SERVER)
2181 sh_socket_open_int ();
2182#endif
2183 }
2184
2185 /* chroot (this is a no-op if no chroot dir is specified
2186 */
2187 status = sh_unix_chroot();
2188 if (status < 0)
2189 {
2190 status = errno;
2191 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2192 sh_error_message(status, errbuf, sizeof(errbuf)), _("chroot"));
2193 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2194 }
2195
2196 /* drop capabilities
2197 */
2198 sl_drop_cap();
2199
2200 SL_RETURN((0),_("sh_unix_init"));
2201}
2202
2203/* --- run a command, securely --- */
2204
2205int sh_unix_run_command (const char * str)
2206{
2207 pid_t pid;
2208 char * arg[4];
2209 char * env[5];
2210 char * path = sh_util_strdup(_("/bin/sh"));
2211
2212 int status = -1;
2213
2214 arg[0] = sh_util_strdup(_("/bin/sh"));
2215 arg[1] = sh_util_strdup(_("-c"));
2216 arg[2] = sh_util_strdup(str);
2217 arg[3] = NULL;
2218
2219 env[0] = sh_util_strdup(_("PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/ucb"));
2220 env[1] = sh_util_strdup(_("SHELL=/bin/sh"));
2221 env[2] = sh_util_strdup(_("IFS= \t\n"));
2222 if (getenv("TZ")) { /* flawfinder: ignore */
2223 char * tz = sh_util_strdup(getenv("TZ")); /* flawfinder: ignore */
2224 size_t tzlen = strlen(tz);
2225 if (S_TRUE == sl_ok_adds (4, tzlen)) {
2226 env[3] = SH_ALLOC(4+tzlen);
2227 sl_strlcpy(env[3], "TZ=", 4);
2228 sl_strlcat(env[3], tz , 4+tzlen);
2229 } else {
2230 env[3] = NULL;
2231 }
2232 } else {
2233 env[3] = NULL;
2234 }
2235 env[4] = NULL;
2236
2237 pid = fork();
2238
2239 if (pid == (pid_t)(-1))
2240 {
2241 return -1;
2242 }
2243
2244 else if (pid == 0) /* child */
2245 {
2246 memset(skey, 0, sizeof(sh_key_t));
2247 (void) umask(S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
2248 sh_unix_closeall (3, -1, S_TRUE); /* in child process */
2249 execve(path, arg, env);
2250 _exit(EXIT_FAILURE);
2251 }
2252
2253 else /* parent */
2254 {
2255 int r;
2256
2257 while((r = waitpid(pid, &status, WUNTRACED)) != pid && r != -1) ;
2258
2259#if !defined(USE_UNO)
2260 if (r == -1 || !WIFEXITED(status))
2261 {
2262 status = -1;
2263 }
2264 else
2265 {
2266 status = WEXITSTATUS(status);
2267 }
2268#endif
2269 }
2270
2271 return status;
2272}
2273
2274/********************************************************
2275 *
2276 * TIME
2277 *
2278 ********************************************************/
2279
2280/* Figure out the time offset of the current timezone
2281 * in a portable way.
2282 */
2283char * t_zone(const time_t * xx)
2284{
2285 struct tm aa;
2286 struct tm bb;
2287
2288 struct tm * aptr;
2289 struct tm * bptr;
2290
2291 int sign = 0;
2292 int diff = 0;
2293 int hh, mm;
2294 static char tz[64];
2295
2296 SL_ENTER(_("t_zone"));
2297
2298#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2299 aptr = gmtime_r (xx, &aa);
2300#else
2301 aptr = gmtime(xx);
2302 if (aptr)
2303 memcpy (&aa, aptr, sizeof(struct tm));
2304#endif
2305
2306#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2307 bptr = localtime_r (xx, &bb);
2308#else
2309 bptr = localtime(xx);
2310 if (bptr)
2311 memcpy (&bb, bptr, sizeof(struct tm));
2312#endif
2313
2314 if (bptr && aptr)
2315 {
2316 /* Check for datum wrap-around.
2317 */
2318 if (aa.tm_year < bb.tm_year)
2319 sign = (-1);
2320 else if (aa.tm_mon < bb.tm_mon)
2321 sign = (-1);
2322 else if (aa.tm_mday < bb.tm_mday)
2323 sign = (-1);
2324 else if (bb.tm_year < aa.tm_year)
2325 sign = ( 1);
2326 else if (bb.tm_mon < aa.tm_mon)
2327 sign = ( 1);
2328 else if (bb.tm_mday < aa.tm_mday)
2329 sign = ( 1);
2330
2331 diff = aa.tm_hour * 60 + aa.tm_min;
2332 diff = (bb.tm_hour * 60 + bb.tm_min) - diff;
2333 diff = diff - (sign * 24 * 60); /* datum wrap-around correction */
2334 hh = diff / 60;
2335 mm = diff - (hh * 60);
2336 sprintf (tz, _("%+03d%02d"), hh, mm); /* known to fit */
2337 }
2338 else
2339 {
2340 sprintf (tz, _("%+03d%02d"), 0, 0);
2341 }
2342 SL_RETURN(tz, _("t_zone"));
2343}
2344
2345unsigned long sh_unix_longtime ()
2346{
2347 return ((unsigned long)time(NULL));
2348}
2349
2350#ifdef HAVE_GETTIMEOFDAY
2351unsigned long sh_unix_notime ()
2352{
2353 struct timeval tv;
2354
2355 gettimeofday (&tv, NULL);
2356
2357 return ((unsigned long)(tv.tv_sec + tv.tv_usec * 10835 + getpid() + getppid()));
2358
2359}
2360#endif
2361
2362static int count_dev_time = 0;
2363
2364void reset_count_dev_time(void)
2365{
2366 count_dev_time = 0;
2367 return;
2368}
2369
2370int sh_unix_settimeserver (const char * address)
2371{
2372
2373 SL_ENTER(_("sh_unix_settimeserver"));
2374
2375 if (address != NULL && count_dev_time < 2
2376 && sl_strlen(address) < SH_PATHBUF)
2377 {
2378 if (count_dev_time == 0)
2379 sl_strlcpy (sh.srvtime.name, address, SH_PATHBUF);
2380 else
2381 sl_strlcpy (sh.srvtime.alt, address, SH_PATHBUF);
2382
2383 ++count_dev_time;
2384 SL_RETURN((0), _("sh_unix_settimeserver"));
2385 }
2386 SL_RETURN((-1), _("sh_unix_settimeserver"));
2387}
2388
2389
2390#ifdef HAVE_NTIME
2391#define UNIXEPOCH 2208988800UL /* difference between Unix time and net time
2392 * The UNIX EPOCH starts in 1970.
2393 */
2394#include <sys/socket.h>
2395#include <netinet/in.h>
2396#include <arpa/inet.h>
2397#include <netdb.h>
2398#include <ctype.h>
2399#endif
2400
2401/* Timeserver service. */
2402/* define is missing on HP-UX 10.20 */
2403#ifndef IPPORT_TIMESERVER
2404#define IPPORT_TIMESERVER 37
2405#endif
2406
2407char * sh_unix_time (time_t thetime, char * buffer, size_t len)
2408{
2409
2410 int status;
2411 char AsciiTime[81]; /* local time */
2412 time_t time_now;
2413 struct tm * time_ptr;
2414#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2415 struct tm time_tm;
2416#endif
2417#ifdef SH_USE_XML
2418 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2419#else
2420 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2421#endif
2422
2423#ifdef HAVE_NTIME
2424 int fd; /* network file descriptor */
2425 u_char net_time[4]; /* remote time in network format */
2426 static int failerr = 0; /* no net time */
2427 int fail = 0; /* no net time */
2428 int errflag;
2429 char errmsg[256];
2430 char error_call[SH_MINIBUF];
2431 int error_num;
2432#endif
2433
2434 SL_ENTER(_("sh_unix_time"));
2435
2436#ifdef HAVE_NTIME
2437 if (thetime == 0)
2438 {
2439 if (sh.srvtime.name[0] == '\0')
2440 {
2441 fail = 1;
2442 (void) time (&time_now);
2443 }
2444 else /* have a timeserver address */
2445 {
2446 /* don't call timeserver more than once per second */
2447 static time_t time_old = 0;
2448 time_t time_new;
2449 static time_t time_saved = 0;
2450 (void) time (&time_new);
2451 if ((time_new == time_old) && (time_saved != 0))
2452 {
2453 time_now = time_saved;
2454 goto end;
2455 }
2456 time_old = time_new;
2457
2458
2459 fd = connect_port_2 (sh.srvtime.name, sh.srvtime.alt,
2460 IPPORT_TIMESERVER,
2461 error_call, &error_num, errmsg, sizeof(errmsg));
2462 if (fd >= 0)
2463 {
2464 if (4 != read_port (fd, (char *) net_time, 4, &errflag, 2))
2465 {
2466 fail = 1;
2467 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2468 MSG_E_NLOST,
2469 _("time"), sh.srvtime.name);
2470 }
2471 sl_close_fd(FIL__, __LINE__, fd);
2472 }
2473 else
2474 {
2475 sh_error_handle ((-1), FIL__, __LINE__, error_num,
2476 MSG_E_NET, errmsg, error_call,
2477 _("time"), sh.srvtime.name);
2478 fail = 1;
2479 }
2480
2481 if (fail == 0)
2482 {
2483 unsigned long ltmp;
2484 UINT32 ttmp;
2485 memcpy(&ttmp, net_time, sizeof(UINT32)); ltmp = ttmp;
2486 time_now = ntohl(ltmp) - UNIXEPOCH;
2487 time_saved = time_now;
2488
2489 if (failerr == 1) {
2490 failerr = 0;
2491 sh_error_handle ((-1), FIL__, __LINE__, 0,
2492 MSG_E_NEST,
2493 _("time"), sh.srvtime.name);
2494 }
2495 }
2496 else
2497 {
2498 (void) time (&time_now);
2499 time_saved = 0;
2500
2501 if (failerr == 0)
2502 {
2503 failerr = 1;
2504 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2505 MSG_SRV_FAIL,
2506 _("time"), sh.srvtime.name);
2507 }
2508 }
2509 end:
2510 ; /* 'label at end of compound statement' */
2511 }
2512 }
2513 else
2514 {
2515 time_now = thetime;
2516 }
2517
2518 /* #ifdef HAVE_NTIME */
2519#else
2520
2521 if (thetime == 0)
2522 {
2523 (void) time (&time_now);
2524 }
2525 else
2526 {
2527 time_now = thetime;
2528 }
2529
2530 /* #ifdef HAVE_NTIME */
2531#endif
2532
2533 if (time_now == (-1) )
2534 {
2535 sl_strlcpy(buffer, _(deftime), len);
2536 SL_RETURN(buffer, _("sh_unix_time"));
2537 }
2538 else
2539 {
2540#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2541 time_ptr = localtime_r (&time_now, &time_tm);
2542#else
2543 time_ptr = localtime (&time_now);
2544#endif
2545 }
2546 if (time_ptr != NULL)
2547 {
2548 status = strftime (AsciiTime, sizeof(AsciiTime),
2549#ifdef SH_USE_XML
2550 _("%Y-%m-%dT%H:%M:%S%%s"),
2551#else
2552 _("[%Y-%m-%dT%H:%M:%S%%s]"),
2553#endif
2554 time_ptr);
2555
2556 sl_snprintf(buffer, len, AsciiTime, t_zone(&time_now));
2557
2558 if ( (status == 0) || (status == sizeof(AsciiTime)) )
2559 {
2560 sl_strlcpy(buffer, _(deftime), len);
2561 SL_RETURN( buffer, _("sh_unix_time"));
2562 }
2563 else
2564 {
2565 SL_RETURN(buffer, _("sh_unix_time"));
2566 }
2567 }
2568
2569 /* last resort
2570 */
2571 sl_strlcpy(buffer, _(deftime), len);
2572 SL_RETURN( buffer, _("sh_unix_time"));
2573}
2574
2575static int sh_unix_use_localtime = S_FALSE;
2576
2577/* whether to use localtime for file timestamps in logs
2578 */
2579int sh_unix_uselocaltime (const char * c)
2580{
2581 int i;
2582 SL_ENTER(_("sh_unix_uselocaltime"));
2583 i = sh_util_flagval(c, &(sh_unix_use_localtime));
2584
2585 SL_RETURN(i, _("sh_unix_uselocaltime"));
2586}
2587
2588char * sh_unix_gmttime (time_t thetime, char * buffer, size_t len)
2589{
2590
2591 int status;
2592
2593 struct tm * time_ptr;
2594#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS)
2595 struct tm time_tm;
2596#endif
2597 char AsciiTime[81]; /* GMT time */
2598#ifdef SH_USE_XML
2599 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2600#else
2601 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2602#endif
2603
2604 SL_ENTER(_("sh_unix_gmttime"));
2605
2606 if (sh_unix_use_localtime == S_FALSE)
2607 {
2608#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2609 time_ptr = gmtime_r (&thetime, &time_tm);
2610#else
2611 time_ptr = gmtime (&thetime);
2612#endif
2613 }
2614 else
2615 {
2616#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2617 time_ptr = localtime_r (&thetime, &time_tm);
2618#else
2619 time_ptr = localtime (&thetime);
2620#endif
2621 }
2622 if (time_ptr != NULL)
2623 {
2624 status = strftime (AsciiTime, 80,
2625#ifdef SH_USE_XML
2626 _("%Y-%m-%dT%H:%M:%S"),
2627#else
2628 _("[%Y-%m-%dT%H:%M:%S]"),
2629#endif
2630 time_ptr);
2631
2632 if ( (status == 0) || (status == 80) )
2633 sl_strlcpy(buffer, _(deftime), len);
2634 else
2635 sl_strlcpy(buffer, AsciiTime, len);
2636 SL_RETURN( buffer, _("sh_unix_gmttime"));
2637 }
2638
2639 /* last resort
2640 */
2641 sl_strlcpy(buffer, _(deftime), len);
2642 SL_RETURN( buffer, _("sh_unix_gmttime"));
2643}
2644
2645
2646char * sh_unix_getUIDdir (int level, uid_t uid, char * out, size_t len)
2647{
2648 struct passwd * tempres;
2649 int status = 0;
2650
2651#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2652 struct passwd pwd;
2653 char * buffer;
2654#endif
2655 char errbuf[SH_ERRBUF_SIZE];
2656
2657 SL_ENTER(_("sh_unix_getUIDdir"));
2658
2659#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2660 buffer = SH_ALLOC(SH_PWBUF_SIZE);
2661 sh_getpwuid_r(uid, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
2662#else
2663 errno = 0;
2664 tempres = sh_getpwuid(uid);
2665 status = errno;
2666#endif
2667
2668 if (tempres == NULL) {
2669 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2670 sh_error_message(status, errbuf, sizeof(errbuf)),
2671 _("getpwuid"), (long) uid, _("completely missing"));
2672#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2673 SH_FREE(buffer);
2674#endif
2675 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2676 }
2677
2678 if (tempres->pw_dir != NULL) {
2679 sl_strlcpy(out, tempres->pw_dir, len);
2680#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2681 SH_FREE(buffer);
2682#endif
2683 SL_RETURN( out, _("sh_unix_getUIDdir"));
2684 } else {
2685 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2686 sh_error_message(status, errbuf, sizeof(errbuf)),
2687 _("getpwuid"), (long) uid, _("pw_dir"));
2688#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2689 SH_FREE(buffer);
2690#endif
2691 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2692 }
2693}
2694
2695/* ------------------- Caching ----------------*/
2696#include "zAVLTree.h"
2697
2698#define CACHE_GID 0
2699#define CACHE_UID 1
2700
2701struct user_id {
2702 char * name;
2703 uid_t id;
2704 struct user_id * next;
2705};
2706
2707static struct user_id * uid_list = NULL;
2708static struct user_id * gid_list = NULL;
2709
2710SH_MUTEX_STATIC(mutex_cache, PTHREAD_MUTEX_INITIALIZER);
2711
2712static void sh_userid_free(struct user_id * item)
2713{
2714 while (item)
2715 {
2716 struct user_id * user = item;
2717 item = item->next;
2718
2719 SH_FREE(user->name);
2720 SH_FREE(user);
2721 }
2722 return;
2723}
2724
2725void sh_userid_destroy ()
2726{
2727 struct user_id * tmp_uid;
2728 struct user_id * tmp_gid;
2729
2730 SH_MUTEX_LOCK_UNSAFE(mutex_cache);
2731 tmp_gid = gid_list;
2732 gid_list = NULL;
2733 tmp_uid = uid_list;
2734 uid_list = NULL;
2735 SH_MUTEX_UNLOCK_UNSAFE(mutex_cache);
2736
2737 sh_userid_free(tmp_uid);
2738 sh_userid_free(tmp_gid);
2739 return;
2740}
2741
2742static void sh_userid_additem(struct user_id * list, struct user_id * item)
2743{
2744 if (list)
2745 {
2746 while (list && list->next)
2747 list = list->next;
2748 list->next = item;
2749 }
2750 return;
2751}
2752
2753static void sh_userid_add(uid_t id, char * username, int which)
2754{
2755 size_t len;
2756 struct user_id * user = SH_ALLOC(sizeof(struct user_id));
2757
2758 if (username)
2759 len = strlen(username) + 1;
2760 else
2761 len = 1;
2762
2763 user->name = SH_ALLOC(len);
2764 user->id = id;
2765 if (username)
2766 sl_strlcpy(user->name, username, len);
2767 else
2768 user->name[0] = '\0';
2769 user->next = NULL;
2770
2771 SH_MUTEX_LOCK(mutex_cache);
2772 if (which == CACHE_UID)
2773 {
2774 if (!uid_list)
2775 uid_list = user;
2776 else
2777 sh_userid_additem(uid_list, user);
2778 }
2779 else
2780 {
2781 if (!gid_list)
2782 gid_list = user;
2783 else
2784 sh_userid_additem(gid_list, user);
2785 }
2786 SH_MUTEX_UNLOCK(mutex_cache);
2787
2788 return;
2789}
2790
2791static char * sh_userid_search(struct user_id * list, uid_t id)
2792{
2793 while (list)
2794 {
2795 if (list->id == id)
2796 return list->name;
2797 list = list->next;
2798 }
2799 return NULL;
2800}
2801
2802static char * sh_userid_get (uid_t id, int which, char * out, size_t len)
2803{
2804 char * user = NULL;
2805
2806 SH_MUTEX_LOCK_UNSAFE(mutex_cache);
2807 if (which == CACHE_UID)
2808 user = sh_userid_search(uid_list, id);
2809 else
2810 user = sh_userid_search(gid_list, id);
2811 if (user)
2812 {
2813 sl_strlcpy(out, user, len);
2814 user = out;
2815 }
2816 SH_MUTEX_UNLOCK_UNSAFE(mutex_cache);
2817
2818 return user;
2819}
2820
2821/* --------- end caching code --------- */
2822
2823char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len)
2824{
2825 struct passwd * tempres;
2826#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2827 struct passwd pwd;
2828 char * buffer;
2829#endif
2830 int status = 0;
2831 char errbuf[SH_ERRBUF_SIZE];
2832 char * tmp;
2833
2834 SL_ENTER(_("sh_unix_getUIDname"));
2835
2836 tmp = sh_userid_get(uid, CACHE_UID, out, len);
2837
2838 if (tmp)
2839 {
2840 if (tmp[0] != '\0')
2841 {
2842 SL_RETURN( out, _("sh_unix_getUIDname"));
2843 }
2844 else
2845 {
2846 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2847 }
2848 }
2849
2850#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2851 buffer = SH_ALLOC(SH_PWBUF_SIZE);
2852 sh_getpwuid_r(uid, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
2853#else
2854 errno = 0;
2855 tempres = sh_getpwuid(uid);
2856 status = errno;
2857#endif
2858
2859 if (tempres == NULL)
2860 {
2861 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2862 sh_error_message(status, errbuf, sizeof(errbuf)),
2863 _("getpwuid"), (long) uid, _("completely missing"));
2864#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2865 SH_FREE(buffer);
2866#endif
2867 sh_userid_add(uid, NULL, CACHE_UID);
2868 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2869 }
2870
2871
2872 if (tempres->pw_name != NULL)
2873 {
2874
2875 sl_strlcpy(out, tempres->pw_name, len);
2876 sh_userid_add(uid, out, CACHE_UID);
2877
2878#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2879 SH_FREE(buffer);
2880#endif
2881
2882 SL_RETURN( out, _("sh_unix_getUIDname"));
2883 }
2884 else
2885 {
2886 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2887 sh_error_message(status, errbuf, sizeof(errbuf)),
2888 _("getpwuid"), (long) uid, _("pw_user"));
2889#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2890 SH_FREE(buffer);
2891#endif
2892 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2893 }
2894 /* notreached */
2895}
2896
2897char * sh_unix_getGIDname (int level, gid_t gid, char * out, size_t len)
2898{
2899 struct group * tempres;
2900 int status = 0;
2901
2902#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2903 struct group grp;
2904 char * buffer;
2905#endif
2906 char errbuf[SH_ERRBUF_SIZE];
2907 char * tmp;
2908
2909 SL_ENTER(_("sh_unix_getGIDname"));
2910
2911 tmp = sh_userid_get((uid_t)gid, CACHE_GID, out, len);
2912
2913 if (tmp)
2914 {
2915 if (tmp[0] != '\0')
2916 {
2917 SL_RETURN( out, _("sh_unix_getGIDname"));
2918 }
2919 else
2920 {
2921 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2922 }
2923 }
2924
2925#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2926 buffer = SH_ALLOC(SH_GRBUF_SIZE);
2927 status = sh_getgrgid_r(gid, &grp, buffer, SH_GRBUF_SIZE, &tempres);
2928#else
2929 errno = 0;
2930 tempres = sh_getgrgid(gid);
2931 status = errno;
2932#endif
2933
2934 if (status == ERANGE)
2935 {
2936 static int seen = 0;
2937
2938 if (seen == 0)
2939 {
2940 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2941 sh_error_message(status, errbuf, sizeof(errbuf)),
2942 _("getgrgid"), (long) gid, _("line too long in group entry"));
2943 ++seen;
2944 }
2945
2946#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2947 SH_FREE(buffer);
2948#endif
2949
2950 sh_userid_add(gid, NULL, CACHE_GID);
2951 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2952 }
2953
2954 if (tempres == NULL)
2955 {
2956 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2957 sh_error_message(status, errbuf, sizeof(errbuf)),
2958 _("getgrgid"), (long) gid, _("completely missing"));
2959
2960#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2961 SH_FREE(buffer);
2962#endif
2963
2964 sh_userid_add(gid, NULL, CACHE_GID);
2965 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2966 }
2967
2968 if (tempres->gr_name != NULL)
2969 {
2970
2971 sl_strlcpy(out, tempres->gr_name, len);
2972 sh_userid_add((uid_t)gid, out, CACHE_GID);
2973
2974#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2975 SH_FREE(buffer);
2976#endif
2977
2978 SL_RETURN( out, _("sh_unix_getGIDname"));
2979 }
2980 else
2981 {
2982 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2983 sh_error_message(status, errbuf, sizeof(errbuf)),
2984 _("getgrgid"), (long) gid, _("gr_name"));
2985
2986#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2987 SH_FREE(buffer);
2988#endif
2989
2990 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2991 }
2992 /* notreached */
2993}
2994
2995int sh_unix_getUser ()
2996{
2997 char * p;
2998 uid_t seuid, sruid;
2999 char user[USER_MAX];
3000 char dir[SH_PATHBUF];
3001
3002 SL_ENTER(_("sh_unix_getUser"));
3003
3004 seuid = geteuid();
3005
3006 sh.effective.uid = seuid;
3007
3008 p = sh_unix_getUIDdir (SH_ERR_ERR, seuid, dir, sizeof(dir));
3009
3010 if (p == NULL)
3011 SL_RETURN((-1), _("sh_unix_getUser"));
3012 else
3013 {
3014 if (sl_strlen(p) >= SH_PATHBUF) {
3015 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
3016 _("getpwuid"), (long) seuid, _("pw_home"));
3017 SL_RETURN((-1), _("sh_unix_getUser"));
3018 } else {
3019 sl_strlcpy ( sh.effective.home, p, SH_PATHBUF);
3020 }
3021 }
3022
3023 sruid = getuid();
3024
3025 sh.real.uid = sruid;
3026
3027 p = sh_unix_getUIDname (SH_ERR_ERR, sruid, user, sizeof(user));
3028 if (p == NULL)
3029 SL_RETURN((-1), _("sh_unix_getUser"));
3030 else
3031 {
3032 if (sl_strlen(p) >= USER_MAX) {
3033 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
3034 _("getpwuid"), (long) sruid, _("pw_user"));
3035 SL_RETURN((-1), _("sh_unix_getUser"));
3036 } else {
3037 sl_strlcpy ( sh.real.user, p, USER_MAX);
3038 }
3039 }
3040
3041 p = sh_unix_getUIDdir (SH_ERR_ERR, sruid, dir, sizeof(dir));
3042
3043 if (p == NULL)
3044 SL_RETURN((-1), _("sh_unix_getUser"));
3045 else
3046 {
3047 if (sl_strlen(p) >= SH_PATHBUF) {
3048 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
3049 _("getpwuid"), (long) sruid, _("pw_home"));
3050 SL_RETURN((-1), _("sh_unix_getUser"));
3051 } else {
3052 sl_strlcpy ( sh.real.home, p, SH_PATHBUF);
3053 }
3054 }
3055
3056 SL_RETURN((0), _("sh_unix_getUser"));
3057
3058 /* notreached */
3059}
3060
3061
3062int sh_unix_getline (SL_TICKET fd, char * line, int sizeofline)
3063{
3064 register int count;
3065 register int n = 0;
3066 char c;
3067
3068 SL_ENTER(_("sh_unix_getline"));
3069
3070 if (sizeofline < 2) {
3071 line[0] = '\0';
3072 SL_RETURN((0), _("sh_unix_getline"));
3073 }
3074
3075 --sizeofline;
3076
3077 while (n < sizeofline) {
3078
3079 count = sl_read (fd, &c, 1);
3080
3081 /* end of file
3082 */
3083 if (count < 1) {
3084 line[n] = '\0';
3085 n = -1;
3086 break;
3087 }
3088
3089 if (/* c != '\0' && */ c != '\n') {
3090 line[n] = c;
3091 ++n;
3092 } else if (c == '\n') {
3093 if (n > 0) {
3094 line[n] = '\0';
3095 break;
3096 } else {
3097 line[n] = '\n'; /* get newline only if only char on line */
3098 ++n;
3099 line[n] = '\0';
3100 break;
3101 }
3102 } else {
3103 line[n] = '\0';
3104 break;
3105 }
3106
3107 }
3108
3109
3110 line[sizeofline] = '\0'; /* make sure line is terminated */
3111 SL_RETURN((n), _("sh_unix_getline"));
3112}
3113
3114
3115#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
3116
3117/**************************************************************
3118 *
3119 * --- FILE INFO ---
3120 *
3121 **************************************************************/
3122
3123#if (defined(__linux__) && (defined(HAVE_LINUX_EXT2_FS_H) || defined(HAVE_EXT2FS_EXT2_FS_H))) || defined(HAVE_STAT_FLAGS)
3124
3125#if defined(__linux__)
3126
3127/* --- Determine ext2fs file attributes. ---
3128 */
3129#include <sys/ioctl.h>
3130#if defined(HAVE_EXT2FS_EXT2_FS_H)
3131#include <ext2fs/ext2_fs.h>
3132#else
3133#include <linux/ext2_fs.h>
3134#endif
3135
3136/* __linux__ includes */
3137#endif
3138
3139static
3140int sh_unix_getinfo_attr (char * name,
3141 unsigned long * flags,
3142 char * c_attr,
3143 int fd, struct stat * buf)
3144{
3145
3146/* TAKEN FROM:
3147 *
3148 * lsattr.c - List file attributes on an ext2 file system
3149 *
3150 * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
3151 * Laboratoire MASI, Institut Blaise Pascal
3152 * Universite Pierre et Marie Curie (Paris VI)
3153 *
3154 * This file can be redistributed under the terms of the GNU General
3155 * Public License
3156 */
3157
3158#ifdef HAVE_STAT_FLAGS
3159
3160 SL_ENTER(_("sh_unix_getinfo_attr"));
3161
3162 *flags = 0;
3163
3164 /* cast to void to avoid compiler warning about unused parameters */
3165 (void) fd;
3166 (void) name;
3167
3168#ifdef UF_NODUMP
3169 if (buf->st_flags & UF_NODUMP) {
3170 *flags |= UF_NODUMP;
3171 c_attr[0] = 'd';
3172 }
3173#endif
3174#ifdef UF_IMMUTABLE
3175 if (buf->st_flags & UF_IMMUTABLE) {
3176 *flags |= UF_IMMUTABLE;
3177 c_attr[1] = 'i';
3178 }
3179#endif
3180#ifdef UF_APPEND
3181 if (buf->st_flags & UF_APPEND) {
3182 *flags |= UF_APPEND;
3183 c_attr[2] = 'a';
3184 }
3185#endif
3186#ifdef UF_NOUNLINK
3187 if (buf->st_flags & UF_NOUNLINK) {
3188 *flags |= UF_NOUNLINK;
3189 c_attr[3] = 'u';
3190 }
3191#endif
3192#ifdef UF_OPAQUE
3193 if (buf->st_flags & UF_OPAQUE) {
3194 *flags |= UF_OPAQUE;
3195 c_attr[4] = 'o';
3196 }
3197#endif
3198#ifdef SF_ARCHIVED
3199 if (buf->st_flags & SF_ARCHIVED) {
3200 *flags |= SF_ARCHIVED;
3201 c_attr[5] = 'R';
3202 }
3203
3204#endif
3205#ifdef SF_IMMUTABLE
3206 if (buf->st_flags & SF_IMMUTABLE) {
3207 *flags |= SF_IMMUTABLE;
3208 c_attr[6] = 'I';
3209 }
3210#endif
3211#ifdef SF_APPEND
3212 if (buf->st_flags & SF_APPEND) {
3213 *flags |= SF_APPEND;
3214 c_attr[7] = 'A';
3215 }
3216#endif
3217#ifdef SF_NOUNLINK
3218 if (buf->st_flags & SF_NOUNLINK) {
3219 *flags |= SF_NOUNLINK;
3220 c_attr[8] = 'U';
3221 }
3222#endif
3223
3224 /* ! HAVE_STAT_FLAGS */
3225#else
3226
3227#ifdef HAVE_EXT2_IOCTLS
3228 int /* fd, */ r, f;
3229
3230 SL_ENTER(_("sh_unix_getinfo_attr"));
3231
3232 *flags = 0;
3233 (void) buf;
3234
3235 /* open() -> aud_open() R.Wichmann
3236 fd = aud_open (FIL__, __LINE__, SL_YESPRIV, name, O_RDONLY|O_NONBLOCK, 0);
3237 */
3238
3239 if (fd == -1 || name == NULL)
3240 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
3241
3242
3243 r = ioctl (fd, EXT2_IOC_GETFLAGS, &f);
3244 /* sl_close_fd (FIL__, __LINE__, fd); */
3245
3246 if (r == -1)
3247 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
3248
3249 if (f == 0)
3250 SL_RETURN(0, _("sh_unix_getinfo_attr"));
3251
3252 *flags = f;
3253
3254/* ! HAVE_EXT2_IOCTLS */
3255#else
3256
3257 SL_ENTER(_("sh_unix_getinfo_attr"));
3258
3259 *flags = 0; /* modified by R.Wichmann */
3260
3261/* ! HAVE_EXT2_IOCTLS */
3262#endif
3263/*
3264 * END
3265 *
3266 * lsattr.c - List file attributes on an ext2 file system
3267 */
3268
3269 if (*flags == 0)
3270 goto theend;
3271
3272#ifdef EXT2_SECRM_FL
3273 if ( (*flags & EXT2_SECRM_FL) != 0 ) c_attr[0] = 's';
3274#endif
3275#ifdef EXT2_UNRM_FL
3276 if ( (*flags & EXT2_UNRM_FL) != 0 ) c_attr[1] = 'u';
3277#endif
3278#ifdef EXT2_SYNC_FL
3279 if ( (*flags & EXT2_SYNC_FL) != 0 ) c_attr[2] = 'S';
3280#endif
3281#ifdef EXT2_IMMUTABLE_FL
3282 if ( (*flags & EXT2_IMMUTABLE_FL) != 0) c_attr[3] = 'i';
3283#endif
3284#ifdef EXT2_APPEND_FL
3285 if ( (*flags & EXT2_APPEND_FL) != 0 ) c_attr[4] = 'a';
3286#endif
3287#ifdef EXT2_NODUMP_FL
3288 if ( (*flags & EXT2_NODUMP_FL) != 0 ) c_attr[5] = 'd';
3289#endif
3290#ifdef EXT2_NOATIME_FL
3291 if ( (*flags & EXT2_NOATIME_FL) != 0) c_attr[6] = 'A';
3292#endif
3293#ifdef EXT2_COMPR_FL
3294 if ( (*flags & EXT2_COMPR_FL) != 0 ) c_attr[7] = 'c';
3295#endif
3296
3297#ifdef EXT2_TOPDIR_FL
3298 if ( (*flags & EXT2_TOPDIR_FL) != 0 ) c_attr[8] = 'T';
3299#endif
3300#ifdef EXT2_DIRSYNC_FL
3301 if ( (*flags & EXT2_DIRSYNC_FL) != 0 ) c_attr[9] = 'D';
3302#endif
3303#ifdef EXT2_NOTAIL_FL
3304 if ( (*flags & EXT2_NOTAIL_FL) != 0 ) c_attr[10] = 't';
3305#endif
3306#ifdef EXT2_JOURNAL_DATA_FL
3307 if ( (*flags & EXT2_JOURNAL_DATA_FL) != 0) c_attr[11] = 'j';
3308#endif
3309
3310 theend:
3311 /* ext2 */
3312#endif
3313
3314 c_attr[12] = '\0';
3315
3316 SL_RETURN(0, _("sh_unix_getinfo_attr"));
3317}
3318
3319/* defined(__linux__) || defined(HAVE_STAT_FLAGS) */
3320#endif
3321
3322/* determine file type
3323 */
3324static
3325int sh_unix_getinfo_type (struct stat * buf,
3326 ShFileType * type,
3327 char * c_mode)
3328{
3329 SL_ENTER(_("sh_unix_getinfo_type"));
3330
3331 if ( S_ISREG(buf->st_mode) ) {
3332 (*type) = SH_FILE_REGULAR;
3333 c_mode[0] = '-';
3334 }
3335 else if ( S_ISLNK(buf->st_mode) ) {
3336 (*type) = SH_FILE_SYMLINK;
3337 c_mode[0] = 'l';
3338 }
3339 else if ( S_ISDIR(buf->st_mode) ) {
3340 (*type) = SH_FILE_DIRECTORY;
3341 c_mode[0] = 'd';
3342 }
3343 else if ( S_ISCHR(buf->st_mode) ) {
3344 (*type) = SH_FILE_CDEV;
3345 c_mode[0] = 'c';
3346 }
3347 else if ( S_ISBLK(buf->st_mode) ) {
3348 (*type) = SH_FILE_BDEV;
3349 c_mode[0] = 'b';
3350 }
3351 else if ( S_ISFIFO(buf->st_mode) ) {
3352 (*type) = SH_FILE_FIFO;
3353 c_mode[0] = '|';
3354 }
3355 else if ( S_ISSOCK(buf->st_mode) ) {
3356 (*type) = SH_FILE_SOCKET;
3357 c_mode[0] = 's';
3358 }
3359 else if ( S_ISDOOR(buf->st_mode) ) {
3360 (*type) = SH_FILE_DOOR;
3361 c_mode[0] = 'D';
3362 }
3363 else if ( S_ISPORT(buf->st_mode) ) {
3364 (*type) = SH_FILE_PORT;
3365 c_mode[0] = 'P';
3366 }
3367 else {
3368 (*type) = SH_FILE_UNKNOWN;
3369 c_mode[0] = '?';
3370 }
3371
3372 SL_RETURN(0, _("sh_unix_getinfo_type"));
3373}
3374
3375int sh_unix_get_ftype(char * fullpath)
3376{
3377 char c_mode[CMODE_SIZE];
3378 struct stat buf;
3379 ShFileType type;
3380 int res;
3381
3382 SL_ENTER(_("sh_unix_get_ftype"));
3383
3384 res = retry_lstat(FIL__, __LINE__, fullpath, &buf);
3385
3386 if (res < 0)
3387 SL_RETURN(SH_FILE_UNKNOWN, _("sh_unix_getinfo_type"));
3388
3389 sh_unix_getinfo_type (&buf, &type, c_mode);
3390
3391 SL_RETURN(type, _("sh_unix_get_ftype"));
3392}
3393
3394
3395static
3396int sh_unix_getinfo_mode (struct stat *buf,
3397 unsigned int * mode,
3398 char * c_mode)
3399{
3400
3401 SL_ENTER(_("sh_unix_getinfo_mode"));
3402
3403 (*mode) = buf->st_mode;
3404
3405 /* make 'ls'-like string */
3406
3407 if ( (buf->st_mode & S_IRUSR) != 0 ) c_mode[1] = 'r';
3408 if ( (buf->st_mode & S_IWUSR) != 0 ) c_mode[2] = 'w';
3409 if ( (buf->st_mode & S_IXUSR) != 0 ) {
3410 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 's';
3411 else c_mode[3] = 'x';
3412 } else {
3413 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 'S';
3414 }
3415
3416 if ( (buf->st_mode & S_IRGRP) != 0 ) c_mode[4] = 'r';
3417 if ( (buf->st_mode & S_IWGRP) != 0 ) c_mode[5] = 'w';
3418 if ( (buf->st_mode & S_IXGRP) != 0 ) {
3419 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 's';
3420 else c_mode[6] = 'x';
3421 } else {
3422 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 'S';
3423 }
3424
3425 if ( (buf->st_mode & S_IROTH) != 0 ) c_mode[7] = 'r';
3426 if ( (buf->st_mode & S_IWOTH) != 0 ) c_mode[8] = 'w';
3427#ifdef S_ISVTX /* not POSIX */
3428 if ( (buf->st_mode & S_IXOTH) != 0 ) {
3429 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 't';
3430 else c_mode[9] = 'x';
3431 } else {
3432 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 'T';
3433 }
3434#else
3435 if ( (buf->st_mode & S_IXOTH) != 0 ) c_mode[9] = 'x';
3436#endif
3437
3438 SL_RETURN(0, _("sh_unix_getinfo_mode"));
3439}
3440
3441
3442long IO_Limit = 0;
3443
3444void sh_unix_io_pause ()
3445{
3446 long runtime;
3447 float someval;
3448 unsigned long sometime;
3449
3450 if (IO_Limit == 0)
3451 {
3452 return;
3453 }
3454 else
3455 {
3456 runtime = (long) (time(NULL) - sh.statistics.time_start);
3457
3458 if (runtime > 0 && (long)(sh.statistics.bytes_hashed/runtime) > IO_Limit)
3459 {
3460 someval = sh.statistics.bytes_hashed - (IO_Limit * runtime);
3461 someval /= (float) IO_Limit;
3462 if (someval < 1.0)
3463 {
3464 someval *= 1000; /* milliseconds in a second */
3465 sometime = (unsigned long) someval;
3466 retry_msleep(0, sometime);
3467 }
3468 else
3469 {
3470 sometime = (unsigned long) someval;
3471 retry_msleep (sometime, 0);
3472 }
3473 }
3474 }
3475 return;
3476}
3477
3478int sh_unix_set_io_limit (const char * c)
3479{
3480 long val;
3481
3482 SL_ENTER(_("sh_unix_set_io_limit"));
3483
3484 val = strtol (c, (char **)NULL, 10);
3485 if (val < 0)
3486 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
3487 _("set I/O limit"), c);
3488
3489 val = (val < 0 ? 0 : val);
3490
3491 IO_Limit = val * 1024;
3492 SL_RETURN( 0, _("sh_unix_set_io_limit"));
3493}
3494
3495/* obtain file info
3496 */
3497extern int flag_err_debug;
3498
3499#include "sh_ignore.h"
3500
3501int sh_unix_checksum_size (char * filename, off_t size, int is_max_size,
3502 char * fileHash, int alert_timeout, SL_TICKET fd, unsigned long mask)
3503{
3504 file_type * tmpFile;
3505 int status;
3506
3507 SL_ENTER(_("sh_unix_checksum_size"));
3508
3509 tmpFile = SH_ALLOC(sizeof(file_type));
3510 tmpFile->link_path = NULL;
3511
3512 if (sh.flag.checkSum != SH_CHECK_INIT)
3513 {
3514 /* lookup file in database */
3515 if (is_max_size == S_TRUE) {
3516 status = sh_hash_get_it (filename, tmpFile, NULL);
3517 if ((status != 0) || (tmpFile->size > size)) {
3518 goto out;
3519 }
3520 } else {
3521 tmpFile->size = size;
3522 }
3523 }
3524 else
3525 {
3526 tmpFile->size = size;
3527 }
3528
3529 /* if last <= current get checksum */
3530 if (tmpFile->size <= size)
3531 {
3532 char hashbuf[KEYBUF_SIZE];
3533 UINT64 local_length = (UINT64) (tmpFile->size < 0 ? 0 : tmpFile->size);
3534 if (sh.flag.opts == S_TRUE) sh_tiger_set_hashtype_mask(mask);
3535 sl_strlcpy(fileHash,
3536 sh_tiger_generic_hash (filename, fd, &(local_length),
3537 alert_timeout, hashbuf, sizeof(hashbuf)),
3538 KEY_LEN+1);
3539
3540 /* return */
3541 if (tmpFile->link_path) SH_FREE(tmpFile->link_path);
3542 SH_FREE(tmpFile);
3543 SL_RETURN( 0, _("sh_unix_checksum_size"));
3544 }
3545
3546 out:
3547 if (tmpFile->link_path) SH_FREE(tmpFile->link_path);
3548 SH_FREE(tmpFile);
3549 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3550 SL_RETURN( -1, _("sh_unix_checksum_size"));
3551}
3552
3553/********************************************************
3554 * Search rotated logfile
3555 */
3556extern char * sh_rotated_log_search(const char * path, struct stat * buf);
3557
3558int sh_check_rotated_log (const char * path,
3559 UINT64 old_size, UINT64 old_inode, const char * old_hash, unsigned long mask)
3560{
3561 struct stat obuf;
3562 UINT64 length_nolim = TIGER_NOLIM;
3563 int retval = S_FALSE;
3564
3565 if (old_size != length_nolim)
3566 {
3567 char hashbuf[KEYBUF_SIZE];
3568 char * rotated_file;
3569
3570 obuf.st_ino = old_inode;
3571 rotated_file = sh_rotated_log_search(path, &obuf);
3572
3573 if (rotated_file && (0 != strcmp(path, rotated_file)))
3574 {
3575 SL_TICKET fd = sl_open_fastread (FIL__, __LINE__, rotated_file, SL_YESPRIV);
3576 if (!SL_ISERROR(fd))
3577 {
3578 sh_unix_checksum_size (rotated_file, old_size, S_FALSE,
3579 hashbuf, 120 /* alert_timeout */, fd, mask);
3580
3581 sl_close(fd);
3582
3583 if (strncmp (old_hash, hashbuf, KEY_LEN) == 0) {
3584 retval = S_TRUE;
3585 }
3586 }
3587 SH_FREE(rotated_file);
3588 }
3589 }
3590 return retval;
3591}
3592
3593
3594int sh_unix_check_selinux = S_FALSE;
3595int sh_unix_check_acl = S_FALSE;
3596
3597#ifdef USE_ACL
3598
3599#include <sys/acl.h>
3600static char * sh_unix_getinfo_acl (char * path, int fd, struct stat * buf)
3601{
3602 /* system.posix_acl_access, system.posix_acl_default
3603 */
3604 char * out = NULL;
3605 char * collect = NULL;
3606 char * tmp;
3607 char * out_compact;
3608 ssize_t len;
3609 acl_t result;
3610
3611 SL_ENTER(_("sh_unix_getinfo_acl"));
3612
3613 result = (fd == -1) ?
3614 acl_get_file (path, ACL_TYPE_ACCESS) :
3615 acl_get_fd (fd);
3616
3617 if (result)
3618 {
3619 out = acl_to_text (result, &len);
3620 if (out && (len > 0)) {
3621 out_compact = sh_util_acl_compact (out, len);
3622 acl_free(out);
3623 if (out_compact)
3624 {
3625 collect = sh_util_strconcat (_("acl_access:"), out_compact, NULL);
3626 SH_FREE(out_compact);
3627 }
3628 }
3629 acl_free(result);
3630 }
3631
3632
3633 if ( S_ISDIR(buf->st_mode) )
3634 {
3635 result = acl_get_file (path, ACL_TYPE_DEFAULT);
3636
3637 if (result)
3638 {
3639 out = acl_to_text (result, &len);
3640 if (out && (len > 0)) {
3641 out_compact = sh_util_acl_compact (out, len);
3642 acl_free(out);
3643 if (out_compact) {
3644 if (collect) {
3645 tmp = sh_util_strconcat (_("acl_default:"),
3646 out_compact, ":", collect, NULL);
3647 SH_FREE(collect);
3648 }
3649 else {
3650 tmp = sh_util_strconcat (_("acl_default:"), out_compact, NULL);
3651 }
3652 SH_FREE(out_compact);
3653 collect = tmp;
3654 }
3655 }
3656 acl_free(result);
3657 }
3658 }
3659
3660 SL_RETURN((collect),_("sh_unix_getinfo_acl"));
3661}
3662#endif
3663
3664#ifdef USE_XATTR
3665
3666#include <attr/xattr.h>
3667static char * sh_unix_getinfo_xattr_int (char * path, int fd, char * name)
3668{
3669 char * out = NULL;
3670 char * tmp = NULL;
3671 size_t size = 256;
3672 ssize_t result;
3673
3674 SL_ENTER(_("sh_unix_getinfo_xattr_int"));
3675
3676 out = SH_ALLOC(size);
3677
3678 result = (fd == -1) ?
3679 lgetxattr (path, name, out, size-1) :
3680 fgetxattr (fd, name, out, size-1);
3681
3682 if (result == -1 && errno == ERANGE)
3683 {
3684 SH_FREE(out);
3685 result = (fd == -1) ?
3686 lgetxattr (path, name, NULL, 0) :
3687 fgetxattr (fd, name, NULL, 0);
3688 size = result + 1;
3689 out = SH_ALLOC(size);
3690 result = (fd == -1) ?
3691 lgetxattr (path, name, out, size-1) :
3692 fgetxattr (fd, name, out, size-1);
3693 }
3694
3695 if ((result > 0) && ((size_t)result < size))
3696 {
3697 out[size-1] = '\0';
3698 tmp = out;
3699 }
3700 else
3701 {
3702 SH_FREE(out);
3703 }
3704
3705 SL_RETURN((tmp),_("sh_unix_getinfo_xattr_int"));
3706}
3707
3708
3709static char * sh_unix_getinfo_xattr (char * path, int fd, struct stat * buf)
3710{
3711 /* system.posix_acl_access, system.posix_acl_default, security.selinux
3712 */
3713 char * tmp;
3714 char * out = NULL;
3715 char * collect = NULL;
3716
3717 SL_ENTER(_("sh_unix_getinfo_xattr"));
3718
3719#ifdef USE_ACL
3720 /*
3721 * we need the acl_get_fd/acl_get_file functions, getxattr will only
3722 * yield the raw bytes
3723 */
3724 if (sh_unix_check_acl == S_TRUE)
3725 {
3726 out = sh_unix_getinfo_acl(path, fd, buf);
3727
3728 if (out)
3729 {
3730 collect = out;
3731 }
3732 }
3733#else
3734 (void) buf;
3735#endif
3736
3737 if (sh_unix_check_selinux == S_TRUE)
3738 {
3739 out = sh_unix_getinfo_xattr_int(path, fd, _("security.selinux"));
3740
3741 if (out)
3742 {
3743 if (collect) {
3744 tmp = sh_util_strconcat(_("selinux:"), out, ":", collect, NULL);
3745 SH_FREE(collect);
3746 }
3747 else {
3748 tmp = sh_util_strconcat(_("selinux:"), out, NULL);
3749 }
3750 SH_FREE(out);
3751 collect = tmp;
3752 }
3753 }
3754
3755 SL_RETURN((collect),_("sh_unix_getinfo_xattr"));
3756}
3757#endif
3758
3759#ifdef USE_XATTR
3760int sh_unix_setcheckselinux (const char * c)
3761{
3762 int i;
3763 SL_ENTER(_("sh_unix_setcheckselinux"));
3764 i = sh_util_flagval(c, &(sh_unix_check_selinux));
3765
3766 SL_RETURN(i, _("sh_unix_setcheckselinux"));
3767}
3768#endif
3769
3770#ifdef USE_ACL
3771int sh_unix_setcheckacl (const char * c)
3772{
3773 int i;
3774 SL_ENTER(_("sh_unix_setcheckacl"));
3775 i = sh_util_flagval(c, &(sh_unix_check_acl));
3776
3777 SL_RETURN(i, _("sh_unix_setcheckacl"));
3778}
3779#endif
3780
3781#ifdef HAVE_LIBZ
3782#include <zlib.h>
3783#endif
3784
3785
3786static void * sh_dummy_filename;
3787static void * sh_dummy_tmp;
3788static void * sh_dummy_tmp2;
3789
3790int sh_unix_getinfo (int level, const char * filename, file_type * theFile,
3791 char * fileHash, int policy)
3792{
3793 char timestr[81];
3794 long runtim;
3795 struct stat buf;
3796 struct stat lbuf;
3797 struct stat fbuf;
3798 volatile int stat_return;
3799 volatile int stat_errno = 0;
3800
3801 ShFileType type;
3802 unsigned int mode;
3803 char * tmp;
3804 char * tmp2;
3805
3806 char * linknamebuf;
3807 volatile int linksize;
3808
3809 extern int get_the_fd (SL_TICKET ticket);
3810
3811 volatile SL_TICKET rval_open;
3812 volatile int err_open = 0;
3813
3814 volatile int fd;
3815 volatile int fstat_return;
3816 volatile int fstat_errno = 0;
3817 volatile int try = 0;
3818
3819 sh_string * content = NULL;
3820
3821 time_t tend;
3822 time_t tstart;
3823
3824
3825 char * path = NULL;
3826
3827 volatile int alert_timeout = 120;
3828
3829 path = theFile->fullpath;
3830
3831 SL_ENTER(_("sh_unix_getinfo"));
3832
3833 if (!MODI_INITIALIZED(theFile->check_flags))
3834 {
3835 tmp2 = sh_util_safe_name (theFile->fullpath);
3836 SH_MUTEX_LOCK(mutex_thread_nolog);
3837 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_SUBGPATH,
3838 _("Uninitialized check mask"), _("sh_unix_getinfo"),
3839 tmp2);
3840 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3841 SH_FREE(tmp2);
3842 SL_RETURN((-1),_("sh_unix_getinfo"));
3843 }
3844
3845 /* Take the address to keep gcc from putting it into a register.
3846 * Avoids the 'clobbered by longjmp' warning.
3847 */
3848 sh_dummy_filename = (void *) &filename;
3849 sh_dummy_tmp = (void *) &tmp;
3850 sh_dummy_tmp2 = (void *) &tmp2;
3851
3852 /* --- Stat the file, and get checksum. ---
3853 */
3854 tstart = time(NULL);
3855
3856 stat_return = retry_lstat (FIL__, __LINE__,
3857 path /* theFile->fullpath */, &buf);
3858
3859 if (stat_return)
3860 stat_errno = errno;
3861
3862 theFile->link_path = NULL;
3863
3864 try_again:
3865
3866 fd = -1;
3867 fstat_return = -1;
3868 rval_open = -1;
3869
3870 if (stat_return == 0 && S_ISREG(buf.st_mode))
3871 {
3872 rval_open = sl_open_fastread (FIL__, __LINE__,
3873 path /* theFile->fullpath */, SL_YESPRIV);
3874 if (SL_ISERROR(rval_open))
3875 {
3876 char * stale = sl_check_stale();
3877
3878 if (stale)
3879 {
3880 SH_MUTEX_LOCK(mutex_thread_nolog);
3881 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, err_open, MSG_E_SUBGEN,
3882 stale, _("sh_unix_getinfo_open"));
3883 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3884 }
3885
3886 if (errno == EBADF && try == 0) /* obsolete, but we keep this, just in case */
3887 {
3888 ++try;
3889 goto try_again;
3890 }
3891 err_open = errno;
3892 }
3893
3894 alert_timeout = 120; /* this is per 8K block now ! */
3895
3896 if (path[1] == 'p' && path[5] == '/' && path[2] == 'r' &&
3897 path[3] == 'o' && path[4] == 'c' && path[0] == '/')
3898 {
3899 /* seven is magic */
3900 alert_timeout = 7;
3901 }
3902
3903 fd = get_the_fd(rval_open);
3904 }
3905
3906 tend = time(NULL);
3907
3908 /* An unprivileged user may slow lstat/open to a crawl
3909 * with clever path/symlink setup
3910 */
3911 if ((tend - tstart) > (time_t) /* 60 */ 6)
3912 {
3913 tmp2 = sh_util_safe_name (theFile->fullpath);
3914 SH_MUTEX_LOCK(mutex_thread_nolog);
3915 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_TOOLATE,
3916 (long)(tend - tstart), tmp2);
3917 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3918 SH_FREE(tmp2);
3919 }
3920
3921 if (fd >= 0)
3922 {
3923 fstat_return = retry_fstat (FIL__, __LINE__, fd, &fbuf);
3924
3925 if (fstat_return)
3926 {
3927 char * stale;
3928
3929 fstat_errno = errno;
3930
3931 stale = sl_check_stale();
3932
3933 if (stale)
3934 {
3935 SH_MUTEX_LOCK(mutex_thread_nolog);
3936 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, fstat_errno,
3937 MSG_E_SUBGEN,
3938 stale, _("sh_unix_getinfo_fstat"));
3939 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3940 }
3941
3942 if (try == 0) /* obsolete, but we keep this, just in case */
3943 {
3944 ++try;
3945 sl_close(rval_open);
3946 goto try_again;
3947 }
3948 }
3949 }
3950 else
3951 {
3952 fd = -1;
3953 }
3954
3955
3956 /* --- case 1: lstat failed ---
3957 */
3958 if (stat_return != 0)
3959 {
3960 stat_return = errno;
3961 if (!SL_ISERROR(rval_open))
3962 sl_close(rval_open);
3963 if (sh.flag.checkSum == SH_CHECK_INIT ||
3964 (sh_hash_have_it (theFile->fullpath) >= 0 &&
3965 (!SH_FFLAG_REPORTED_SET(theFile->file_reported))))
3966 {
3967 if (S_FALSE == sh_ignore_chk_del(theFile->fullpath)) {
3968 int flags = sh_hash_getflags (theFile->fullpath);
3969
3970 if ((flags >= 0) && (flags & SH_FFLAG_ENOENT) == 0) {
3971 char errbuf[SH_ERRBUF_SIZE];
3972 uid_t euid;
3973 (void) sl_get_euid(&euid);
3974 tmp2 = sh_util_safe_name (theFile->fullpath);
3975 SH_MUTEX_LOCK(mutex_thread_nolog);
3976 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
3977 _("lstat"),
3978 sh_error_message (stat_errno, errbuf, sizeof(errbuf)),
3979 (long) euid,
3980 tmp2);
3981 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3982 SH_FREE(tmp2);
3983 sh_hash_set_flag (theFile->fullpath, SH_FFLAG_ENOENT);
3984 }
3985 }
3986 }
3987 SL_RETURN((-1),_("sh_unix_getinfo"));
3988 }
3989
3990 /* --- case 2: not a regular file ---
3991 */
3992 else if (! S_ISREG(buf.st_mode))
3993 {
3994 if (fileHash != NULL)
3995 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3996 }
3997
3998 /* --- case 3a: a regular file, fstat ok ---
3999 */
4000 else if (fstat_return == 0 &&
4001 buf.st_mode == fbuf.st_mode &&
4002 buf.st_ino == fbuf.st_ino &&
4003 buf.st_uid == fbuf.st_uid &&
4004 buf.st_gid == fbuf.st_gid &&
4005 buf.st_dev == fbuf.st_dev )
4006 {
4007 if (fileHash != NULL)
4008 {
4009 if ((theFile->check_flags & MODI_CHK) == 0 ||
4010 sh_restrict_this(theFile->fullpath, (UINT64) fbuf.st_size,
4011 (UINT64) fbuf.st_mode, rval_open))
4012 {
4013 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4014 }
4015 else if ((theFile->check_flags & MODI_PREL) != 0 &&
4016 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
4017 alert_timeout, theFile->fullpath))
4018 {
4019 if (0 != sh_prelink_run (theFile->fullpath,
4020 fileHash, alert_timeout, theFile->check_flags))
4021 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4022 }
4023 else
4024 {
4025 char hashbuf[KEYBUF_SIZE];
4026 UINT64 length_current = TIGER_NOLIM;
4027
4028 if (MODI_TXT_ENABLED(theFile->check_flags) && fbuf.st_size < (10 * SH_TXT_MAX))
4029 {
4030 sl_init_content (rval_open, fbuf.st_size);
4031 }
4032
4033 if (sh.flag.opts == S_TRUE) sh_tiger_set_hashtype_mask(theFile->check_flags);
4034 sl_strlcpy(fileHash,
4035 sh_tiger_generic_hash (theFile->fullpath,
4036 rval_open, &length_current,
4037 alert_timeout,
4038 hashbuf, sizeof(hashbuf)),
4039 KEY_LEN+1);
4040
4041 content = sl_get_content(rval_open);
4042 content = sh_string_copy(content);
4043
4044 if ((theFile->check_flags & MODI_SGROW) != 0)
4045 {
4046 /* Update size so it matches the one for which the checksum
4047 has been computed */
4048 fbuf.st_size = length_current;
4049 buf.st_size = fbuf.st_size;
4050 sl_rewind(rval_open);
4051 sh_unix_checksum_size (theFile->fullpath, length_current, S_TRUE,
4052 &fileHash[KEY_LEN + 1],
4053 alert_timeout, rval_open, theFile->check_flags);
4054 }
4055 }
4056 }
4057 }
4058
4059 /* --- case 3b: a regular file, fstat ok, but different ---
4060 */
4061 else if (fstat_return == 0 && S_ISREG(fbuf.st_mode))
4062 {
4063 memcpy (&buf, &fbuf, sizeof( struct stat ));
4064
4065 if (fileHash != NULL)
4066 {
4067 if ((theFile->check_flags & MODI_CHK) == 0 ||
4068 sh_restrict_this(theFile->fullpath, (UINT64) fbuf.st_size,
4069 (UINT64) fbuf.st_mode, rval_open))
4070 {
4071 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4072 }
4073 else if (policy == SH_LEVEL_PRELINK &&
4074 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
4075 alert_timeout, theFile->fullpath))
4076 {
4077 if (0 != sh_prelink_run (theFile->fullpath,
4078 fileHash, alert_timeout, theFile->check_flags))
4079 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4080 }
4081 else
4082 {
4083 char hashbuf[KEYBUF_SIZE];
4084 UINT64 length_current = TIGER_NOLIM;
4085
4086 if (MODI_TXT_ENABLED(theFile->check_flags) && fbuf.st_size < (10 * SH_TXT_MAX))
4087 {
4088 sl_init_content (rval_open, fbuf.st_size);
4089 }
4090
4091 if (sh.flag.opts == S_TRUE) sh_tiger_set_hashtype_mask(theFile->check_flags);
4092 sl_strlcpy(fileHash,
4093 sh_tiger_generic_hash (theFile->fullpath, rval_open,
4094 &length_current,
4095 alert_timeout,
4096 hashbuf, sizeof(hashbuf)),
4097 KEY_LEN + 1);
4098
4099 content = sl_get_content(rval_open);
4100 content = sh_string_copy(content);
4101
4102 if ((theFile->check_flags & MODI_SGROW) != 0)
4103 {
4104 /* Update size so it matches the one for which the checksum
4105 has been computed */
4106 fbuf.st_size = length_current;
4107 buf.st_size = fbuf.st_size;
4108 sl_rewind(rval_open);
4109 sh_unix_checksum_size (theFile->fullpath, length_current, S_TRUE,
4110 &fileHash[KEY_LEN + 1],
4111 alert_timeout, rval_open, theFile->check_flags);
4112 }
4113 }
4114 }
4115 }
4116
4117 /* --- case 4: a regular file, fstat failed ---
4118 */
4119
4120 else /* fstat_return != 0 or !S_ISREG(fbuf.st_mode) or open() failed */
4121 {
4122 uid_t euid;
4123
4124 if (fileHash != NULL)
4125 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4126
4127 if ((theFile->check_flags & MODI_CHK) != 0)
4128 {
4129 tmp2 = sh_util_safe_name (theFile->fullpath);
4130
4131
4132 if (fd >= 0 && fstat_return != 0)
4133 {
4134 char errbuf[SH_ERRBUF_SIZE];
4135 (void) sl_get_euid(&euid);
4136
4137 SH_MUTEX_LOCK(mutex_thread_nolog);
4138 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
4139 _("fstat"),
4140 sh_error_message (fstat_errno, errbuf, sizeof(errbuf)),
4141 (long) euid,
4142 tmp2);
4143 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4144 }
4145 else if (fd >= 0 && !S_ISREG(fbuf.st_mode))
4146 {
4147 SH_MUTEX_LOCK(mutex_thread_nolog);
4148 sh_error_handle (level, FIL__, __LINE__, fstat_errno,
4149 MSG_E_NOTREG, tmp2);
4150 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4151 }
4152 else
4153 {
4154 char errbuf[SH_ERRBUF_SIZE];
4155 char errbuf2[SH_ERRBUF_SIZE];
4156 sl_strlcpy(errbuf, sl_error_string(rval_open), sizeof(errbuf));
4157 sh_error_message(err_open, errbuf2, sizeof(errbuf2));
4158 SH_MUTEX_LOCK(mutex_thread_nolog);
4159 sh_error_handle (level, FIL__, __LINE__, err_open,
4160 MSG_E_READ, errbuf, errbuf2, tmp2);
4161 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4162 }
4163 SH_FREE(tmp2);
4164 }
4165 }
4166
4167
4168 /* --- Determine file type. ---
4169 */
4170 memset (theFile->c_mode, '-', CMODE_SIZE-1);
4171 theFile->c_mode[CMODE_SIZE-1] = '\0';
4172
4173 memset (theFile->link_c_mode, '-', CMODE_SIZE-1);
4174 theFile->link_c_mode[CMODE_SIZE-1] = '\0';
4175
4176 sh_unix_getinfo_type (&buf, &type, theFile->c_mode);
4177 theFile->type = type;
4178
4179#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
4180
4181 /* --- Determine file attributes. ---
4182 */
4183 memset (theFile->c_attributes, '-', ATTRBUF_SIZE);
4184 theFile->c_attributes[ATTRBUF_USED] = '\0';
4185 theFile->attributes = 0;
4186
4187#if (defined(__linux__) && (defined(HAVE_LINUX_EXT2_FS_H) || defined(HAVE_EXT2FS_EXT2_FS_H))) || defined(HAVE_STAT_FLAGS)
4188 if (theFile->c_mode[0] != 'c' && theFile->c_mode[0] != 'b' &&
4189 theFile->c_mode[0] != 'l' )
4190 sh_unix_getinfo_attr(theFile->fullpath,
4191 &theFile->attributes, theFile->c_attributes,
4192 fd, &buf);
4193#endif
4194#endif
4195
4196#if defined(USE_XATTR) && defined(USE_ACL)
4197 if (sh_unix_check_selinux == S_TRUE || sh_unix_check_acl == S_TRUE)
4198 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
4199#elif defined(USE_XATTR)
4200 if (sh_unix_check_selinux == S_TRUE)
4201 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
4202#elif defined(USE_ACL)
4203 if (sh_unix_check_acl == S_TRUE)
4204 theFile->attr_string = sh_unix_getinfo_acl (theFile->fullpath, fd, &buf);
4205#else
4206 theFile->attr_string = NULL;
4207#endif
4208
4209 if (!SL_ISERROR(rval_open))
4210 sl_close(rval_open);
4211
4212
4213 /* --- I/O limit. ---
4214 */
4215 if (IO_Limit > 0)
4216 {
4217 runtim = (long) (time(NULL) - sh.statistics.time_start);
4218
4219 if (runtim > 0 && (long)(sh.statistics.bytes_hashed/runtim) > IO_Limit)
4220 retry_msleep(1, 0);
4221 }
4222
4223 /* --- Determine permissions. ---
4224 */
4225 sh_unix_getinfo_mode (&buf, &mode, theFile->c_mode);
4226
4227 /* --- Trivia. ---
4228 */
4229 theFile->dev = buf.st_dev;
4230 theFile->ino = buf.st_ino;
4231 theFile->mode = buf.st_mode;
4232 theFile->hardlinks = buf.st_nlink;
4233 theFile->owner = buf.st_uid;
4234 theFile->group = buf.st_gid;
4235 theFile->rdev = buf.st_rdev;
4236 theFile->size = buf.st_size;
4237 theFile->blksize = (unsigned long) buf.st_blksize;
4238 theFile->blocks = (unsigned long) buf.st_blocks;
4239 theFile->atime = buf.st_atime;
4240 theFile->mtime = buf.st_mtime;
4241 theFile->ctime = buf.st_ctime;
4242
4243
4244 /* --- Owner and group. ---
4245 */
4246
4247 if (NULL == sh_unix_getGIDname(SH_ERR_ALL, buf.st_gid, theFile->c_group, GROUP_MAX+1)) {
4248
4249 tmp2 = sh_util_safe_name (theFile->fullpath);
4250
4251 if (policy == SH_LEVEL_ALLIGNORE)
4252 {
4253 SH_MUTEX_LOCK(mutex_thread_nolog);
4254 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
4255 MSG_FI_NOGRP,
4256 (long) buf.st_gid, tmp2);
4257 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4258 }
4259 else
4260 {
4261 SH_MUTEX_LOCK(mutex_thread_nolog);
4262 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
4263 MSG_FI_NOGRP,
4264 (long) buf.st_gid, tmp2);
4265 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4266 }
4267 SH_FREE(tmp2);
4268 sl_snprintf(theFile->c_group, GROUP_MAX+1, "%d", (long) buf.st_gid);
4269 }
4270
4271
4272 if (NULL == sh_unix_getUIDname(SH_ERR_ALL, buf.st_uid, theFile->c_owner, USER_MAX+1)) {
4273
4274 tmp2 = sh_util_safe_name (theFile->fullpath);
4275
4276 if (policy == SH_LEVEL_ALLIGNORE)
4277 {
4278 SH_MUTEX_LOCK(mutex_thread_nolog);
4279 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
4280 MSG_FI_NOUSR,
4281 (long) buf.st_uid, tmp2);
4282 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4283 }
4284 else
4285 {
4286 SH_MUTEX_LOCK(mutex_thread_nolog);
4287 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
4288 MSG_FI_NOUSR,
4289 (long) buf.st_uid, tmp2);
4290 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4291 }
4292 SH_FREE(tmp2);
4293 sl_snprintf(theFile->c_owner, USER_MAX+1, "%d", (long) buf.st_uid);
4294 }
4295
4296 /* --- Output the file. ---
4297 */
4298 if (flag_err_debug == S_TRUE)
4299 {
4300 tmp2 = sh_util_safe_name ((filename == NULL) ?
4301 theFile->fullpath : filename);
4302 (void) sh_unix_time(theFile->mtime, timestr, sizeof(timestr));
4303 SH_MUTEX_LOCK(mutex_thread_nolog);
4304 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LIST,
4305 theFile->c_mode,
4306 theFile->hardlinks,
4307 theFile->c_owner,
4308 theFile->c_group,
4309 (unsigned long) theFile->size,
4310 timestr,
4311 tmp2);
4312 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4313 SH_FREE(tmp2);
4314 }
4315
4316 /* --- Check for links. ---
4317 */
4318 if (theFile->c_mode[0] == 'l')
4319 {
4320 linknamebuf = SH_ALLOC(PATH_MAX);
4321
4322 /* flawfinder: ignore */
4323 linksize = readlink (theFile->fullpath, linknamebuf, PATH_MAX-1);
4324
4325 if (linksize < (PATH_MAX-1) && linksize >= 0)
4326 linknamebuf[linksize] = '\0';
4327 else
4328 linknamebuf[PATH_MAX-1] = '\0';
4329
4330 if (linksize < 0)
4331 {
4332 char errbuf[SH_ERRBUF_SIZE];
4333 linksize = errno;
4334 tmp2 = sh_util_safe_name (theFile->fullpath);
4335 SH_MUTEX_LOCK(mutex_thread_nolog);
4336 sh_error_handle (level, FIL__, __LINE__, linksize, MSG_FI_RDLNK,
4337 sh_error_message (linksize, errbuf, sizeof(errbuf)), tmp2);
4338 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4339 SH_FREE(tmp2);
4340 SH_FREE(linknamebuf);
4341 theFile->link_path = sh_util_strdup("-");
4342 SL_RETURN((-1),_("sh_unix_getinfo"));
4343 }
4344
4345 if (linknamebuf[0] == '/')
4346 {
4347 theFile->link_path = sh_util_strdup (linknamebuf);
4348 }
4349 else
4350 {
4351 tmp = sh_util_dirname(theFile->fullpath);
4352 if (tmp) {
4353 theFile->link_path = SH_ALLOC(PATH_MAX);
4354 sl_strlcpy (theFile->link_path, tmp, PATH_MAX);
4355 SH_FREE(tmp);
4356 } else {
4357 theFile->link_path = SH_ALLOC(PATH_MAX);
4358 theFile->link_path[0] = '\0';
4359 }
4360 /*
4361 * Only attach '/' if not root directory. Handle "//", which
4362 * according to POSIX is implementation-defined, and may be
4363 * different from "/" (however, three or more '/' will collapse
4364 * to one).
4365 */
4366 tmp = theFile->link_path; while (*tmp == '/') ++tmp;
4367 if (*tmp != '\0')
4368 {
4369 sl_strlcat (theFile->link_path, "/", PATH_MAX);
4370 }
4371 sl_strlcat (theFile->link_path, linknamebuf, PATH_MAX);
4372 }
4373
4374 /* stat the link
4375 */
4376 stat_return = retry_lstat (FIL__, __LINE__, theFile->link_path, &lbuf);
4377
4378 /* check for error
4379 */
4380 if (stat_return != 0)
4381 {
4382 stat_return = errno;
4383 tmp = sh_util_safe_name (theFile->fullpath);
4384 tmp2 = sh_util_safe_name (theFile->link_path);
4385 if (stat_return != ENOENT)
4386 {
4387 uid_t euid;
4388 char errbuf[SH_ERRBUF_SIZE];
4389
4390 (void) sl_get_euid(&euid);
4391 SH_MUTEX_LOCK(mutex_thread_nolog);
4392 sh_error_handle (level, FIL__, __LINE__, stat_return,
4393 MSG_FI_STAT,
4394 _("lstat (link target)"),
4395 sh_error_message (stat_return,errbuf, sizeof(errbuf)),
4396 (long) euid,
4397 tmp2);
4398 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4399 }
4400 else
4401 {
4402 /* a dangling link -- everybody seems to have plenty of them
4403 */
4404 SH_MUTEX_LOCK(mutex_thread_nolog);
4405 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_DLNK,
4406 tmp, tmp2);
4407 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4408 }
4409 theFile->linkisok = BAD;
4410 SH_FREE(tmp);
4411 SH_FREE(tmp2);
4412 SH_FREE(linknamebuf);
4413 /*
4414 * changed Tue Feb 10 16:16:13 CET 2004:
4415 * add dangling symlinks into database
4416 * SL_RETURN((-1),_("sh_unix_getinfo"));
4417 */
4418 theFile->linkmode = 0;
4419 SL_RETURN((0),_("sh_unix_getinfo"));
4420 }
4421
4422 theFile->linkisok = GOOD;
4423
4424
4425 /* --- Determine file type. ---
4426 */
4427 sh_unix_getinfo_type (&lbuf, &type, theFile->link_c_mode);
4428 theFile->type = type;
4429
4430 /* --- Determine permissions. ---
4431 */
4432 sh_unix_getinfo_mode (&lbuf, &mode, theFile->link_c_mode);
4433 theFile->linkmode = lbuf.st_mode;
4434
4435 /* --- Output the link. ---
4436 */
4437 if (theFile->linkisok == GOOD)
4438 {
4439 tmp2 = sh_util_safe_name (linknamebuf);
4440 SH_MUTEX_LOCK(mutex_thread_nolog);
4441 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LLNK,
4442 theFile->link_c_mode, tmp2);
4443 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4444 SH_FREE(tmp2);
4445 }
4446 SH_FREE(linknamebuf);
4447 }
4448 else /* not a link, theFile->c_mode[0] != 'l' */
4449 {
4450 if (content)
4451 {
4452#ifdef HAVE_LIBZ
4453 unsigned long clen;
4454 unsigned char * compressed;
4455#ifdef HAVE_COMPRESSBOUND
4456 clen = compressBound(sh_string_len(content));
4457#else
4458 if (sh_string_len(content) > 10*SH_TXT_MAX)
4459 clen = SH_TXT_MAX;
4460 else
4461 clen = 13 + (int)(1.0001*sh_string_len(content));
4462#endif
4463 compressed = SH_ALLOC(clen);
4464 if (Z_OK == compress(compressed, &clen,
4465 (unsigned char *) sh_string_str(content),
4466 sh_string_len(content)))
4467 {
4468 if (clen < SH_TXT_MAX)
4469 {
4470 sh_util_base64_enc_alloc (&(theFile->link_path),
4471 (char *) compressed, clen);
4472 }
4473 else
4474 {
4475 char tmsg[128];
4476 char * tpath = sh_util_safe_name (theFile->fullpath);
4477 sl_snprintf(tmsg, sizeof(tmsg),
4478 _("compressed file too large (%lu bytes)"),
4479 clen);
4480 SH_MUTEX_LOCK(mutex_thread_nolog);
4481 sh_error_handle (SH_ERR_WARN, FIL__, __LINE__, -1,
4482 MSG_E_SUBGPATH, tmsg,
4483 _("sh_unix_getinfo"), tpath);
4484 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4485 SH_FREE(tpath);
4486 }
4487 }
4488 SH_FREE(compressed);
4489#endif
4490 sh_string_destroy(&content);
4491 }
4492 }
4493 SL_RETURN((0),_("sh_unix_getinfo"));
4494}
4495
4496/* #if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE) */
4497#endif
4498
4499int sh_unix_unlock(char * lockfile, char * flag)
4500{
4501 int error = 0;
4502
4503 SL_ENTER(_("sh_unix_unlock"));
4504
4505 if (sh.flag.isdaemon == S_FALSE && flag == NULL)
4506 SL_RETURN((0),_("sh_unix_unlock"));
4507
4508 /* --- Logfile is not locked to us. ---
4509 */
4510 if (sh.flag.islocked == BAD && flag != NULL)
4511 SL_RETURN((-1),_("sh_unix_unlock"));
4512
4513 /* --- Check whether the directory is secure. ---
4514 */
4515 if (0 != tf_trust_check (lockfile, SL_YESPRIV))
4516 SL_RETURN((-1),_("sh_unix_unlock"));
4517
4518 /* --- Delete the lock file. ---
4519 */
4520 error = retry_aud_unlink (FIL__, __LINE__, lockfile);
4521
4522 if (error == 0)
4523 {
4524 if (flag != NULL)
4525 sh.flag.islocked = BAD; /* not locked anymore */
4526 }
4527 else if (flag != NULL)
4528 {
4529 char errbuf[SH_ERRBUF_SIZE];
4530 error = errno;
4531 sh_error_handle ((-1), FIL__, __LINE__, error, MSG_E_UNLNK,
4532 sh_error_message(error, errbuf, sizeof(errbuf)),
4533 lockfile);
4534 SL_RETURN((-1),_("sh_unix_unlock"));
4535 }
4536 SL_RETURN((0),_("sh_unix_unlock"));
4537}
4538
4539int sh_unix_check_piddir (char * pidpath)
4540{
4541 static struct stat buf;
4542 int status = 0;
4543 char * pid_dir;
4544
4545 SL_ENTER(_("sh_unix_check_piddir"));
4546
4547 pid_dir = sh_util_dirname (pidpath);
4548
4549 status = retry_lstat (FIL__, __LINE__, pid_dir, &buf);
4550
4551 if (status < 0 && errno == ENOENT)
4552 {
4553 status = mkdir (pid_dir, 0777);
4554 if (status < 0)
4555 {
4556 sh_error_handle ((-1), FIL__, __LINE__, status,
4557 MSG_E_SUBGEN,
4558 _("Cannot create PID directory"),
4559 _("sh_unix_check_piddir"));
4560 SH_FREE(pid_dir);
4561 SL_RETURN((-1),_("sh_unix_check_piddir"));
4562 }
4563 }
4564 else if (!S_ISDIR(buf.st_mode))
4565 {
4566 sh_error_handle ((-1), FIL__, __LINE__, status,
4567 MSG_E_SUBGEN,
4568 _("Path of PID directory refers to a non-directory object"),
4569 _("sh_unix_check_piddir"));
4570 SH_FREE(pid_dir);
4571 SL_RETURN((-1),_("sh_unix_check_piddir"));
4572 }
4573 SH_FREE(pid_dir);
4574 SL_RETURN((0),_("sh_unix_check_piddir"));
4575}
4576
4577int sh_unix_lock (char * lockfile, char * flag)
4578{
4579 int filed;
4580 int errnum;
4581 char myPid[64];
4582 SL_TICKET fd;
4583 extern int get_the_fd (SL_TICKET ticket);
4584
4585 SL_ENTER(_("sh_unix_lock"));
4586
4587 sprintf (myPid, "%ld\n", (long) sh.pid); /* known to fit */
4588
4589 if (flag == NULL) /* PID file, check for directory */
4590 {
4591 if (0 != sh_unix_check_piddir (lockfile))
4592 {
4593 SL_RETURN((-1),_("sh_unix_lock"));
4594 }
4595 }
4596
4597 fd = sl_open_safe_rdwr (FIL__, __LINE__,
4598 lockfile, SL_YESPRIV); /* fails if file exists */
4599
4600 if (!SL_ISERROR(fd))
4601 {
4602 errnum = sl_write (fd, myPid, sl_strlen(myPid));
4603 filed = get_the_fd(fd);
4604 fchmod (filed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
4605 sl_close (fd);
4606
4607 if (!SL_ISERROR(errnum))
4608 {
4609 if (flag != NULL)
4610 sh.flag.islocked = GOOD;
4611 SL_RETURN((0),_("sh_unix_lock"));
4612 }
4613 }
4614
4615 TPT((0, FIL__, __LINE__, _("msg=<open pid file failed>\n")));
4616 if (flag != NULL)
4617 sh.flag.islocked = BAD;
4618 SL_RETURN((-1),_("sh_unix_lock"));
4619
4620 /* notreached */
4621}
4622
4623
4624/* check whether file is locked
4625 */
4626int sh_unix_test_and_lock (char * filename, char * lockfile)
4627{
4628 static struct stat buf;
4629 int status = 0;
4630
4631
4632 SL_TICKET fd;
4633 char line_in[128];
4634
4635 SL_ENTER(_("sh_unix_test_and_lock"));
4636
4637 status = retry_lstat (FIL__, __LINE__, lockfile, &buf);
4638
4639 /* --- No lock file found, try to lock. ---
4640 */
4641
4642 if (status < 0 && errno == ENOENT)
4643 {
4644 if (0 == sh_unix_lock (lockfile, filename))
4645 {
4646 if (filename != NULL)
4647 sh.flag.islocked = GOOD;
4648 SL_RETURN((0),_("sh_unix_test_and_lock"));
4649 }
4650 else
4651 {
4652 sh_error_handle ((-1), FIL__, __LINE__, status,
4653 MSG_E_SUBGEN,
4654 (filename == NULL) ? _("Cannot create PID file (1)") : _("Cannot create lock file (1)"),
4655 _("sh_unix_test_and_lock"));
4656 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4657 }
4658 }
4659 else if (status == 0 && buf.st_size == 0)
4660 {
4661 if (filename != NULL)
4662 sh.flag.islocked = GOOD;
4663 sh_unix_unlock (lockfile, filename);
4664 if (filename != NULL)
4665 sh.flag.islocked = BAD;
4666 if (0 == sh_unix_lock (lockfile, filename))
4667 {
4668 if (filename != NULL)
4669 sh.flag.islocked = GOOD;
4670 SL_RETURN((0),_("sh_unix_test_and_lock"));
4671 }
4672 else
4673 {
4674 sh_error_handle ((-1), FIL__, __LINE__, status,
4675 MSG_E_SUBGEN,
4676 (filename == NULL) ? _("Cannot create PID file (2)") : _("Cannot create lock file (2)"),
4677 _("sh_unix_test_and_lock"));
4678 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4679 }
4680 }
4681
4682 /* --- Check on lock. ---
4683 */
4684
4685 if (status >= 0)
4686 {
4687 fd = sl_open_read (FIL__, __LINE__, lockfile, SL_YESPRIV);
4688 if (SL_ISERROR(fd))
4689 sh_error_handle ((-1), FIL__, __LINE__, fd,
4690 MSG_E_SUBGEN,
4691 (filename == NULL) ? _("Cannot open PID file for read") : _("Cannot open lock file for read"),
4692 _("sh_unix_test_and_lock"));
4693 }
4694 else
4695 fd = -1;
4696
4697 if (!SL_ISERROR(fd))
4698 {
4699 /* read the PID in the lock file
4700 */
4701 status = sl_read (fd, line_in, sizeof(line_in));
4702 line_in[sizeof(line_in)-1] = '\0';
4703
4704 /* convert to numeric
4705 */
4706 if (status > 0)
4707 {
4708 errno = 0;
4709 status = strtol(line_in, (char **)NULL, 10);
4710 if (errno == ERANGE || status <= 0)
4711 {
4712 sh_error_handle ((-1), FIL__, __LINE__, status,
4713 MSG_E_SUBGEN,
4714 (filename == NULL) ? _("Bad PID in PID file") : _("Bad PID in lock file"),
4715 _("sh_unix_test_and_lock"));
4716
4717 status = -1;
4718 }
4719 }
4720 else
4721 {
4722 sh_error_handle ((-1), FIL__, __LINE__, status,
4723 MSG_E_SUBGEN,
4724 (filename == NULL) ? _("Cannot read PID file") : _("Cannot read lock file"),
4725 _("sh_unix_test_and_lock"));
4726 }
4727 sl_close(fd);
4728
4729 if (status > 0 && (unsigned int) status == sh.pid)
4730 {
4731 if (filename != NULL)
4732 sh.flag.islocked = GOOD;
4733 SL_RETURN((0),_("sh_unix_test_and_lock"));
4734 }
4735
4736
4737 /* --- Check whether the process exists. ---
4738 */
4739 if (status > 0)
4740 {
4741 errno = 0;
4742 status = aud_kill (FIL__, __LINE__, status, 0);
4743
4744 /* Does not exist, so remove the stale lock
4745 * and create a new one.
4746 */
4747 if (status < 0 && errno == ESRCH)
4748 {
4749 if (filename != NULL)
4750 sh.flag.islocked = GOOD;
4751 if (0 != sh_unix_unlock(lockfile, filename) && (filename !=NULL))
4752 sh.flag.islocked = BAD;
4753 else
4754 {
4755 if (0 == sh_unix_lock (lockfile, filename))
4756 {
4757 if (filename != NULL)
4758 sh.flag.islocked = GOOD;
4759 SL_RETURN((0),_("sh_unix_test_and_lock"));
4760 }
4761 else
4762 {
4763 sh_error_handle ((-1), FIL__, __LINE__, status,
4764 MSG_E_SUBGEN,
4765 (filename == NULL) ? _("Cannot create PID file (3)") : _("Cannot create lock file (3)"),
4766 _("sh_unix_test_and_lock"));
4767 }
4768 if (filename != NULL)
4769 sh.flag.islocked = BAD;
4770 }
4771 }
4772 else
4773 {
4774 sh_error_handle ((-1), FIL__, __LINE__, status,
4775 MSG_E_SUBGEN,
4776 (filename == NULL) ? _("Cannot remove stale PID file, PID may be a running process") : _("Cannot remove stale lock file, PID may be a running process"),
4777 _("sh_unix_test_and_lock"));
4778 if (filename != NULL)
4779 sh.flag.islocked = BAD;
4780 }
4781 }
4782 }
4783 SL_RETURN((-1),_("sh_unix_testlock"));
4784}
4785
4786/* write the PID file
4787 */
4788int sh_unix_write_pid_file()
4789{
4790 return sh_unix_test_and_lock(NULL, sh.srvlog.alt);
4791}
4792
4793/* write lock for filename
4794 */
4795int sh_unix_write_lock_file(char * filename)
4796{
4797 size_t len;
4798 int res;
4799 char * lockfile;
4800
4801 if (filename == NULL)
4802 return (-1);
4803
4804 len = sl_strlen(filename);
4805 if (sl_ok_adds(len, 6))
4806 len += 6;
4807 lockfile = SH_ALLOC(len);
4808 sl_strlcpy(lockfile, filename, len);
4809 sl_strlcat(lockfile, _(".lock"), len);
4810 res = sh_unix_test_and_lock(filename, lockfile);
4811 SH_FREE(lockfile);
4812 return res;
4813}
4814
4815/* rm lock for filename
4816 */
4817int sh_unix_rm_lock_file(char * filename)
4818{
4819 size_t len;
4820 int res;
4821 char * lockfile;
4822
4823 if (filename == NULL)
4824 return (-1);
4825
4826 len = sl_strlen(filename);
4827 if (sl_ok_adds(len, 6))
4828 len += 6;
4829 lockfile = SH_ALLOC(len);
4830 sl_strlcpy(lockfile, filename, len);
4831 sl_strlcat(lockfile, _(".lock"), len);
4832
4833 res = sh_unix_unlock(lockfile, filename);
4834 SH_FREE(lockfile);
4835 return res;
4836}
4837
4838/* rm lock for filename
4839 */
4840int sh_unix_rm_pid_file()
4841{
4842 return sh_unix_unlock(sh.srvlog.alt, NULL);
4843}
4844
4845/* Test whether file exists
4846 */
4847int sh_unix_file_exists(char * path)
4848{
4849 struct stat buf;
4850
4851 SL_ENTER(_("sh_unix_file_exists"));
4852
4853 if (0 == retry_lstat(FIL__, __LINE__, path, &buf))
4854 SL_RETURN( S_TRUE, _("sh_unix_file_exists"));
4855 else
4856 SL_RETURN( S_FALSE, _("sh_unix_file_exists"));
4857}
4858
4859
4860/* Test whether file exists, is a character device, and allows read
4861 * access.
4862 */
4863int sh_unix_device_readable(int fd)
4864{
4865 struct stat buf;
4866
4867 SL_ENTER(_("sh_unix_device_readable"));
4868
4869 if (retry_fstat(FIL__, __LINE__, fd, &buf) == -1)
4870 SL_RETURN( (-1), _("sh_unix_device_readable"));
4871 else if ( S_ISCHR(buf.st_mode) && 0 != (S_IROTH & buf.st_mode) )
4872 SL_RETURN( (0), _("sh_unix_device_readable"));
4873 else
4874 SL_RETURN( (-1), _("sh_unix_device_readable"));
4875}
4876
4877static char preq[16];
4878
4879/* return true if database is remote
4880 */
4881int file_is_remote ()
4882{
4883 static int init = 0;
4884 struct stat buf;
4885
4886 SL_ENTER(_("file_is_remote"));
4887
4888 if (init == 0)
4889 {
4890 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4891 ++init;
4892 }
4893 if (0 == sl_strncmp (sh.data.path, preq, 15))
4894 {
4895 if (sh.data.path[15] != '\0') /* should be start of path */
4896 {
4897 if (0 == stat(&(sh.data.path[15]), &buf))
4898 {
4899 SL_RETURN( S_FALSE, _("file_is_remote"));
4900 }
4901 else
4902 {
4903 char * tmp = sh_util_safe_name (&(sh.data.path[15]));
4904 sh_error_handle((-1), FIL__, __LINE__, S_FALSE, MSG_E_SUBGPATH,
4905 _("No local baseline database at expected path"),
4906 _("file_is_remote"),
4907 tmp);
4908 SH_FREE(tmp);
4909 }
4910 }
4911 else
4912 {
4913 sh_error_handle((-1), FIL__, __LINE__, S_FALSE, MSG_E_SUBGEN,
4914 _("No local baseline database path known"),
4915 _("file_is_remote"));
4916 }
4917 SL_RETURN( S_TRUE, _("file_is_remote"));
4918 }
4919 SL_RETURN( S_FALSE, _("file_is_remote"));
4920}
4921
4922/* Return the path to the configuration/database file.
4923 */
4924char * file_path(char what, char flag)
4925{
4926 static int init = 0;
4927
4928 SL_ENTER(_("file_path"));
4929
4930 if (init == 0)
4931 {
4932 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4933 ++init;
4934 }
4935
4936 switch (what)
4937 {
4938
4939 case 'C':
4940 if (0 == sl_strncmp (sh.conf.path, preq, 15))
4941 {
4942#if defined(SH_WITH_SERVER)
4943 if (sh.flag.isserver == S_TRUE && sl_strlen(sh.conf.path) == 15)
4944 SL_RETURN( NULL, _("file_path"));
4945 if (sh.flag.isserver == S_TRUE)
4946 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4947#endif
4948 if (flag == 'R')
4949 SL_RETURN( preq, _("file_path"));
4950 if (flag == 'I')
4951 {
4952 if (sl_strlen(sh.conf.path) == 15)
4953 SL_RETURN( NULL, _("file_path"));
4954 else
4955 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4956 }
4957 SL_RETURN ( preq, _("file_path"));
4958 }
4959 else
4960 SL_RETURN( sh.conf.path, _("file_path"));
4961 /* break; *//* unreachable */
4962
4963 case 'D':
4964 if (0 == sl_strncmp (sh.data.path, preq, 15))
4965 {
4966 if (flag == 'R')
4967 SL_RETURN( preq, _("file_path"));
4968 if (flag == 'W' && sl_strlen(sh.data.path) == 15)
4969 SL_RETURN (NULL, _("file_path"));
4970 if (flag == 'W')
4971 SL_RETURN( &(sh.data.path[15]), _("file_path"));
4972 }
4973 else
4974 SL_RETURN( sh.data.path, _("file_path"));
4975 break;
4976
4977 default:
4978 SL_RETURN( NULL, _("file_path"));
4979 }
4980
4981 return NULL; /* notreached */
4982}
4983/************************************************/
4984/**** Mlock Utilities ****/
4985/************************************************/
4986
4987#include <limits.h>
4988
4989int sh_unix_pagesize()
4990{
4991 int pagesize = 4096;
4992#if defined(_SC_PAGESIZE)
4993 pagesize = sysconf(_SC_PAGESIZE);
4994#elif defined(_SC_PAGE_SIZE)
4995 pagesize = sysconf(_SC_PAGE_SIZE);
4996#elif defined(HAVE_GETPAGESIZE)
4997 pagesize = getpagesize();
4998#elif defined(PAGESIZE)
4999 pagesize = PAGESIZE;
5000#endif
5001
5002 return ((pagesize > 0) ? pagesize : 4096);
5003}
5004
5005typedef struct sh_page_lt {
5006 unsigned long page_start;
5007 int page_refcount;
5008 char file[64];
5009 int line;
5010 struct sh_page_lt * next;
5011} sh_page_l;
5012
5013sh_page_l * sh_page_locked = NULL;
5014volatile int page_locking = 0;
5015
5016unsigned long sh_unix_lookup_page (void * in_addr, size_t len, int * num_pages)
5017{
5018 int pagesize = sh_unix_pagesize();
5019 unsigned long addr = (unsigned long) in_addr;
5020
5021 unsigned long pagebase;
5022 unsigned long pagediff;
5023 unsigned long pagenum = addr / pagesize;
5024
5025 SL_ENTER(_("sh_unix_lookup_page"));
5026#if 0
5027 fprintf(stderr, "mlock: --> base %ld, pagenum: %ld\n",
5028 addr, pagenum);
5029#endif
5030
5031 /* address of first page
5032 */
5033 pagebase = pagenum * pagesize;
5034
5035 /* number of pages
5036 */
5037 pagediff = (addr + len) - pagebase;
5038 pagenum = pagediff / pagesize;
5039 if (pagenum * pagesize < pagediff)
5040 ++pagenum;
5041
5042#if 0
5043 fprintf(stderr, "mlock: --> pagebase %ld, pagediff %ld, (addr + len) %ld\n",
5044 pagebase, pagediff, (addr + len));
5045#endif
5046
5047 *num_pages = pagenum;
5048 SL_RETURN((pagebase), _("sh_unix_lookup_page"));
5049}
5050
5051
5052#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5053
5054SH_MUTEX_STATIC(mutex_mlock,PTHREAD_MUTEX_INITIALIZER);
5055
5056int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
5057{
5058 int num_pages;
5059 int status = 0;
5060 int pagesize;
5061 sh_page_l * page_list;
5062 unsigned long addr;
5063#ifdef TEST_MLOCK
5064 int i = 0;
5065#endif
5066
5067 SL_ENTER(_("sh_unix_mlock"));
5068
5069 /* There's no cancellation point here, except if tracing is on
5070 */
5071 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5072
5073 page_list = sh_page_locked;
5074
5075 if (0 != page_locking)
5076 {
5077 status = -1;
5078 goto exit_mlock;
5079 }
5080
5081 page_locking = 1;
5082
5083 pagesize = sh_unix_pagesize();
5084 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
5085
5086#ifdef TEST_MLOCK
5087 fprintf(stderr, "mlock: addr %ld, base %ld, pages: %d, length %d\n",
5088 (unsigned long) in_addr, addr, num_pages, len);
5089#endif
5090
5091 /* increase refcount of locked pages
5092 * addr is first page; num_pages is #(consecutive pages) to lock
5093 */
5094
5095 while ((page_list != NULL) && (num_pages > 0))
5096 {
5097#ifdef TEST_MLOCK
5098 fprintf(stderr, "mlock: check page %d: %ld [%d]\n",
5099 i, page_list->page_start, page_list->page_refcount);
5100#endif
5101 if (page_list->page_start == addr)
5102 {
5103 page_list->page_refcount += 1;
5104 num_pages -= 1;
5105 addr += pagesize;
5106#ifdef TEST_MLOCK
5107 fprintf(stderr, "mlock: found page %d: %ld [%d], next page %ld\n",
5108 i, page_list->page_start, page_list->page_refcount, addr);
5109#endif
5110 }
5111#ifdef TEST_MLOCK
5112 ++i;
5113#endif
5114 page_list = page_list->next;
5115 }
5116
5117 /* mlock some more pages, if needed
5118 */
5119 while (num_pages > 0)
5120 {
5121#ifdef TEST_MLOCK
5122 fprintf(stderr, "mlock: lock page %d: mlock %ld [num_pages %d]\n",
5123 i, addr, num_pages);
5124 ++i;
5125#endif
5126 page_list = SH_ALLOC(sizeof(sh_page_l));
5127 page_list->page_start = addr;
5128 page_list->page_refcount = 1;
5129 sl_strlcpy(page_list->file, file, 64);
5130 page_list->line = line;
5131 status = mlock( (void *) addr, pagesize);
5132 if (status != 0)
5133 {
5134#ifdef TEST_MLOCK
5135 char errbuf[SH_ERRBUF_SIZE];
5136 fprintf(stderr, "mlock: error: %s\n",
5137 sh_error_message(errno, errbuf, sizeof(errbuf)));
5138#endif
5139 SH_FREE(page_list);
5140 page_locking = 0;
5141 goto exit_mlock;
5142 }
5143 page_list->next = sh_page_locked;
5144 sh_page_locked = page_list;
5145 num_pages -= 1;
5146 addr += pagesize;
5147 }
5148 page_locking = 0;
5149
5150 exit_mlock:
5151 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5152
5153 SL_RETURN((status), _("sh_unix_mlock"));
5154}
5155#else
5156int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
5157{
5158 (void) file; (void) line;
5159 (void) in_addr; (void) len;
5160 return -1;
5161}
5162#endif
5163
5164#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5165int sh_unix_munlock (void * in_addr, size_t len)
5166{
5167 int num_pages;
5168 int unlocked;
5169 int status;
5170 int pagesize;
5171 sh_page_l * page_list;
5172 sh_page_l * page_last;
5173 unsigned long addr;
5174
5175 int test_count;
5176 int test_status;
5177 int test_pages;
5178
5179#ifdef TEST_MLOCK
5180 int i = 0;
5181#endif
5182
5183 SL_ENTER(_("sh_unix_munlock"));
5184
5185 /* There's no cancellation point here, except if tracing is on
5186 */
5187 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5188
5189 unlocked = 0;
5190 status = 0;
5191 page_list = sh_page_locked;
5192
5193 if (0 != page_locking)
5194 {
5195 status = -1;
5196 goto exit_munlock;
5197 }
5198 page_locking = 1;
5199
5200 pagesize = sh_unix_pagesize();
5201 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
5202
5203#ifdef TEST_MLOCK
5204 fprintf(stderr, "munlock: in_addr %ld, addr %ld, pages: %d, length %d\n",
5205 (unsigned long) in_addr, addr, num_pages, len);
5206#endif
5207
5208 test_pages = num_pages;
5209
5210 /* reduce refcount of locked pages
5211 * addr is first page; num_pages is #(consecutive pages) to lock
5212 */
5213 while ((page_list != NULL) && (num_pages > 0))
5214 {
5215#ifdef TEST_MLOCK
5216 fprintf(stderr, "munlock: page %d: %ld [%d]\n",
5217 i, page_list->page_start, page_list->page_refcount);
5218#endif
5219
5220 test_status = 0;
5221 for (test_count = 0; test_count < test_pages; ++test_count)
5222 {
5223 if (page_list->page_start == (addr + (test_count * pagesize)))
5224 {
5225 test_status = 1;
5226 break;
5227 }
5228 }
5229
5230 if (test_status == 1)
5231 {
5232 page_list->page_refcount -= 1;
5233 if (page_list->page_refcount == 0)
5234 {
5235 status = munlock ( (void *) addr, pagesize);
5236 ++unlocked;
5237 }
5238 num_pages -= 1;
5239#ifdef TEST_MLOCK
5240 fprintf(stderr,
5241 "munlock: page %d: %ld [refcount %d], refcount reduced\n",
5242 i, page_list->page_start, page_list->page_refcount);
5243#endif
5244 }
5245#ifdef TEST_MLOCK
5246 ++i;
5247#endif
5248 page_list = page_list->next;
5249 }
5250
5251#ifdef TEST_MLOCK
5252 i = 0;
5253#endif
5254
5255 if (unlocked > 0)
5256 {
5257 page_list = sh_page_locked;
5258 page_last = sh_page_locked;
5259
5260 while ((page_list != NULL) && (unlocked > 0))
5261 {
5262 if (page_list->page_refcount == 0)
5263 {
5264#ifdef TEST_MLOCK
5265 fprintf(stderr, "munlock: remove page %d: %ld [refcount %d]\n",
5266 i, page_list->page_start, page_list->page_refcount);
5267#endif
5268 if (page_last != page_list)
5269 {
5270 page_last->next = page_list->next;
5271 SH_FREE(page_list);
5272 page_list = page_last->next;
5273 }
5274 else
5275 {
5276 page_last = page_list->next;
5277 if (page_list == sh_page_locked)
5278 sh_page_locked = page_list->next;
5279 SH_FREE(page_list);
5280 page_list = page_last;
5281 }
5282 --unlocked;
5283 }
5284 else
5285 {
5286#ifdef TEST_MLOCK
5287 fprintf(stderr, "munlock: skip page %d: %ld [refcount %d]\n",
5288 i, page_list->page_start, page_list->page_refcount);
5289#endif
5290
5291 page_last = page_list;
5292 page_list = page_list->next;
5293 }
5294#ifdef TEST_MLOCK
5295 ++i;
5296#endif
5297 }
5298 }
5299
5300 page_locking = 0;
5301
5302 exit_munlock:
5303 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5304 SL_RETURN((status), _("sh_unix_munlock"));
5305}
5306#else
5307int sh_unix_munlock (void * in_addr, size_t len)
5308{
5309 (void) in_addr; (void) len;
5310 return -1;
5311}
5312#endif
5313
5314int sh_unix_count_mlock()
5315{
5316 unsigned int i = 0;
5317 char str[32][64];
5318 sh_page_l * page_list;
5319
5320 SL_ENTER(_("sh_unix_count_mlock"));
5321
5322#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5323 /* There's no cancellation point here, except if tracing is on
5324 */
5325 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5326#endif
5327
5328 page_list = sh_page_locked;
5329
5330 while (page_list != NULL)
5331 {
5332#ifdef WITH_TPT
5333 if (i < 32)
5334 sl_snprintf(str[i], 64, _("file: %s line: %d page: %d"),
5335 page_list->file, page_list->line, i+1);
5336#endif
5337 page_list = page_list->next;
5338 ++i;
5339 }
5340
5341#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5342 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5343#endif
5344
5345#ifdef WITH_TPT
5346 {
5347 unsigned int j = 0;
5348 while (j < i && j < 32)
5349 {
5350 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, j, MSG_E_SUBGEN,
5351 str[j], _("sh_unix_count_mlock"));
5352 ++j;
5353 }
5354 }
5355#endif
5356
5357 sl_snprintf(str[0], 64, _("%d pages locked"), i);
5358 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, i, MSG_E_SUBGEN,
5359 str[0], _("sh_unix_count_mlock"));
5360 SL_RETURN((i), _("sh_unix_count_mlock"));
5361}
5362
5363/************************************************/
5364/************************************************/
5365/**** Stealth Utilities ****/
5366/************************************************/
5367/************************************************/
5368#ifdef SH_STEALTH
5369
5370void sh_unix_xor_code (char * str, int len)
5371{
5372 register int i;
5373
5374 for (i = 0; i < len; ++i) str[i] ^= (char) XOR_CODE;
5375 return;
5376}
5377
5378#if !defined(SH_STEALTH_MICRO)
5379
5380
5381int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
5382 unsigned long * bytes_read);
5383unsigned long first_hex_block(SL_TICKET fd, unsigned long * max);
5384
5385/*
5386 * --- Get hidden data from a block of hex data. ---
5387 */
5388int sh_unix_getline_stealth (SL_TICKET fd, char * str, int len)
5389{
5390 int add_off = 0, llen;
5391 static unsigned long off_data = 0;
5392 static unsigned long max_data = 0;
5393 static unsigned long bytes_read = 0;
5394 static int stealth_init = BAD;
5395
5396 SL_ENTER(_("sh_unix_getline_stealth"));
5397
5398 if (str == NULL)
5399 {
5400 off_data = 0;
5401 max_data = 0;
5402 bytes_read = 0;
5403 stealth_init = BAD;
5404 SL_RETURN(0, _("sh_unix_getline_stealth"));
5405 }
5406
5407 /* --- Initialize. ---
5408 */
5409 if (stealth_init == BAD)
5410 {
5411 off_data = first_hex_block(fd, &max_data);
5412 if (off_data == 0)
5413 {
5414 dlog(1, FIL__, __LINE__,
5415 _("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"));
5416 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
5417 _("Stealth config file."));
5418 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
5419 }
5420 stealth_init = GOOD;
5421 max_data += off_data;
5422 }
5423
5424 /* --- Seek to proper position. ---
5425 */
5426 if (bytes_read >= max_data || add_off < 0)
5427 {
5428 dlog(1, FIL__, __LINE__,
5429 _("The capacity of the container image file for the stealth config file seems to be too small. Your config file is likely truncated.\n"));
5430 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
5431 _("Stealth config file."));
5432 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
5433 }
5434 sl_seek(fd, off_data);
5435
5436 /* --- Read one line. ---
5437 */
5438 add_off = hideout_hex_block(fd, (unsigned char *) str, len, &bytes_read);
5439 off_data += add_off;
5440
5441 llen = sl_strlen(str);
5442 SL_RETURN(llen, _("sh_unix_getline_stealth"));
5443}
5444
5445int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
5446 unsigned long * bytes_read)
5447{
5448
5449 register int i, j, k;
5450 unsigned char c, e;
5451 register int num;
5452 unsigned char mask[9] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
5453 unsigned long here = 0;
5454 unsigned long retval = 0;
5455 unsigned long bread = 0;
5456
5457 SL_ENTER(_("hideout_hex_block"));
5458
5459 ASSERT_RET((len > 1), _("len > 1"), (0));
5460
5461 --len;
5462
5463 i = 0;
5464 while (i < len)
5465 {
5466 for (j = 0; j < 8; ++j)
5467 {
5468
5469 /* --- Get a low byte, modify, read back. ---
5470 */
5471 for (k = 0; k < 2; ++k)
5472 {
5473 /* -- Skip whitespace. ---
5474 */
5475 c = ' ';
5476 do {
5477 do {
5478 num = sl_read (fd, &c, 1);
5479 } while (num == 0 && errno == EINTR);
5480 if (num > 0)
5481 ++here;
5482 else if (num == 0)
5483 SL_RETURN((0), _("hideout_hex_block"));
5484 else
5485 SL_RETURN((-1), _("hideout_hex_block"));
5486 } while (c == '\n' || c == '\t' || c == '\r' ||
5487 c == ' ');
5488 }
5489
5490
5491 /* --- e is the value of the low byte. ---
5492 */
5493 e = (unsigned char) sh_util_hexchar( c );
5494 if ((e & mask[7]) != 0) /* bit is set */
5495 str[i] |= mask[j];
5496 else /* bit is not set */
5497 str[i] &= ~mask[j];
5498
5499 bread += 1;
5500 }
5501 if (str[i] == '\n') break;
5502 ++i;
5503 }
5504
5505 if (i != 0)
5506 str[i] = '\0';
5507 else
5508 str[i+1] = '\0'; /* keep newline and terminate */
5509 retval += here;
5510 *bytes_read += (bread/8);
5511
5512 SL_RETURN(retval, _("hideout_hex_block"));
5513}
5514
5515/* --- Get offset of first data block. ---
5516 */
5517unsigned long first_hex_block(SL_TICKET fd, unsigned long * max)
5518{
5519 unsigned int i;
5520 long num = 1;
5521 unsigned long lnum;
5522 char c;
5523 int nothex = 0;
5524 unsigned long retval = 0;
5525 unsigned int this_line = 0;
5526 char theline[SH_BUFSIZE];
5527
5528 SL_ENTER(_("first_hex_block"));
5529
5530 *max = 0;
5531
5532 while (1)
5533 {
5534 theline[0] = '\0';
5535 this_line = 0;
5536 c = '\0';
5537 while (c != '\n' && this_line < (sizeof(theline)-1))
5538 {
5539 do {
5540 num = sl_read (fd, &c, 1);
5541 } while (num == 0 && errno == EINTR);
5542 if (num > 0)
5543 theline[this_line] = c;
5544 else
5545 SL_RETURN((0), _("first_hex_block"));
5546 ++this_line;
5547 }
5548 theline[this_line] = '\0';
5549
5550 /* not only 'newline' */
5551 if (this_line > 60)
5552 {
5553 nothex = 0;
5554 i = 0;
5555 while (nothex == 0 && i < (this_line-1))
5556 {
5557 if (! isxdigit((int)theline[i])) nothex = 1;
5558 ++i;
5559 }
5560 if (nothex == 1) retval += this_line;
5561 }
5562 else
5563 {
5564 nothex = 1;
5565 retval += this_line;
5566 }
5567
5568 if (nothex == 0)
5569 {
5570 *max = 0;
5571 do {
5572 do {
5573 num = sl_read (fd, theline, SH_BUFSIZE);
5574 } while (num == 0 && errno == EINTR);
5575 if (num > 0)
5576 {
5577 lnum = (unsigned long) num;
5578 for (i = 0; i < lnum; ++i)
5579 {
5580 c = theline[i];
5581 if (c == '\n' || c == '\t' || c == '\r' || c == ' ')
5582 ;
5583 else if (!isxdigit((int)c))
5584 break;
5585 else
5586 *max += 1;
5587 }
5588 }
5589 } while (num > 0);
5590
5591 *max /= 16;
5592 SL_RETURN((retval), _("first_hex_block"));
5593 }
5594
5595 }
5596 /* SL_RETURN((0), _("first_hex_block")); *//* unreachable */
5597}
5598
5599 /* if !defined(SH_STEALTH_MICRO) */
5600#endif
5601
5602 /* ifdef SH_STEALTH */
5603#endif
5604
5605/*
5606 * anti-debugger code
5607 */
5608#if defined(SCREW_IT_UP)
5609
5610#if defined(HAVE_PTHREAD)
5611
5612static pthread_key_t gSigtrapVariables_key;
5613static pthread_once_t gSigtrapVariables_key_once = PTHREAD_ONCE_INIT;
5614
5615static inline void make_gSigtrapVariables_key()
5616{
5617 (void) pthread_key_create(&gSigtrapVariables_key, free);
5618}
5619
5620struct sh_sigtrap_variables * sh_sigtrap_variables_get()
5621{
5622 void * ptr;
5623
5624 (void) pthread_once(&gSigtrapVariables_key_once, make_gSigtrapVariables_key);
5625
5626 ptr = pthread_getspecific(gSigtrapVariables_key);
5627 if (ptr == NULL) {
5628 ptr = calloc(1,sizeof(struct sh_sigtrap_variables));
5629 if (ptr == NULL) {
5630 return NULL;
5631 }
5632 (void) pthread_setspecific(gSigtrapVariables_key, ptr);
5633 }
5634
5635 return (struct sh_sigtrap_variables *) ptr;
5636}
5637
5638/* !defined(HAVE_PTHREAD) */
5639#else
5640
5641static struct sh_sigtrap_variables global_sigtrap_variables;
5642struct sh_sigtrap_variables * sh_sigtrap_variables_get()
5643{
5644 return &global_sigtrap_variables;
5645}
5646
5647#endif
5648
5649int sh_sigtrap_max_duration_set (const char * str)
5650{
5651 /* For security (prevent reloading with larger value)
5652 * this value can only be set once.
5653 */
5654 static int once = 0;
5655 int i;
5656
5657 SL_ENTER(_("sh_sigtrap_max_duration_set"));
5658
5659 i = atoi (str);
5660
5661 if (i >= 0 && once == 0)
5662 {
5663 sh.sigtrap_max_duration = i;
5664 once = 1;
5665 }
5666 else
5667 {
5668 SL_RETURN ((-1), _("sh_sigtrap_max_duration_set"));
5669 }
5670 SL_RETURN( (0), _("sh_sigtrap_max_duration_set"));
5671}
5672
5673void sh_sigtrap_handler (int signum)
5674{
5675 struct sh_sigtrap_variables * sigtrap_variables;
5676 sigtrap_variables = sh_sigtrap_variables_get();
5677 if (sigtrap_variables == NULL) {
5678 /* Perhaps, it's better to not die, and to continue using Samhain,
5679 even if this part does not work. */
5680 return;
5681 }
5682
5683#ifdef HAVE_GETTIMEOFDAY
5684 {
5685 struct timeval tv;
5686 long difftv;
5687
5688 gettimeofday(&tv, NULL);
5689 difftv = (tv.tv_sec - sigtrap_variables->save_tv.tv_sec) * 1000000 +
5690 (tv.tv_usec - sigtrap_variables->save_tv.tv_usec);
5691 if (difftv > sh.sigtrap_max_duration)
5692 raise(SIGKILL);
5693 }
5694#endif
5695
5696 sigtrap_variables->not_traced = signum;
5697 /* cppcheck-suppress memleak */
5698 return;
5699}
5700#endif
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