source: trunk/src/sh_unix.c@ 536

Last change on this file since 536 was 534, checked in by katerina, 6 years ago

Version 4.3.0, support for /etc/subuid, /etc/subgid
File size: 133.2 KB
Line 
1/* SAMHAIN file system integrity testing */
2/* Copyright (C) 1999 Rainer Wichmann */
3/* */
4/* This program is free software; you can redistribute it */
5/* and/or modify */
6/* it under the terms of the GNU General Public License as */
7/* published by */
8/* the Free Software Foundation; either version 2 of the License, or */
9/* (at your option) any later version. */
10/* */
11/* This program is distributed in the hope that it will be useful, */
12/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
13/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
14/* GNU General Public License for more details. */
15/* */
16/* You should have received a copy of the GNU General Public License */
17/* along with this program; if not, write to the Free Software */
18/* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20#include "config_xor.h"
21
22
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26#include <ctype.h>
27#ifdef HAVE_LINUX_FS_H
28#include <linux/fs.h>
29#endif
30
31#ifdef HAVE_MEMORY_H
32#include <memory.h>
33#endif
34
35#ifdef HAVE_UNISTD_H
36#include <errno.h>
37#include <signal.h>
38#include <pwd.h>
39#include <grp.h>
40#include <sys/types.h>
41#include <sys/stat.h>
42#include <sys/resource.h>
43#include <fcntl.h>
44#include <unistd.h>
45/* need to undef these, since the #define's may be picked up from
46 * linux/wait.h, and will clash with a typedef in sys/wait.h
47 */
48#undef P_ALL
49#undef P_PID
50#undef P_PGID
51#include <sys/wait.h>
52
53/*********************
54#ifdef HAVE_SYS_VFS_H
55#include <sys/vfs.h>
56#endif
57**********************/
58#endif
59
60#if TIME_WITH_SYS_TIME
61#include <sys/time.h>
62#include <time.h>
63#else
64#if HAVE_SYS_TIME_H
65#include <sys/time.h>
66#else
67#include <time.h>
68#endif
69#endif
70
71#ifdef HAVE_SYS_SELECT_H
72#include <sys/select.h>
73#endif
74
75#ifndef FD_SET
76#define NFDBITS 32
77#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
78#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
79#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
80#endif /* !FD_SET */
81#ifndef FD_SETSIZE
82#define FD_SETSIZE 32
83#endif
84#ifndef FD_ZERO
85#define FD_ZERO(p) memset((char *)(p), '\0', sizeof(*(p)))
86#endif
87
88
89#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
90#include <sys/mman.h>
91#endif
92
93#include "samhain.h"
94#include "sh_error.h"
95#include "sh_unix.h"
96#include "sh_utils.h"
97#include "sh_mem.h"
98#include "sh_hash.h"
99#include "sh_tools.h"
100#include "sh_restrict.h"
101#include "sh_ipvx.h"
102#include "sh_tiger.h"
103#include "sh_prelink.h"
104#include "sh_pthread.h"
105#include "sh_sem.h"
106
107/* moved here from far below
108 */
109#include <netdb.h>
110
111#define SH_NEED_PWD_GRP
112#define SH_NEED_GETHOSTBYXXX
113#include "sh_static.h"
114
115#ifndef HAVE_LSTAT
116#define lstat stat
117#endif
118
119#if defined(S_IFLNK) && !defined(S_ISLNK)
120#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
121#else
122#if !defined(S_ISLNK)
123#define S_ISLNK(mode) (0)
124#endif
125#endif
126
127#if defined(S_IFSOCK) && !defined(S_ISSOCK)
128#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
129#else
130#if !defined(S_ISSOCK)
131#define S_ISSOCK(mode) (0)
132#endif
133#endif
134
135#if defined(S_IFDOOR) && !defined(S_ISDOOR)
136#define S_ISDOOR(mode) (((mode) & S_IFMT) == S_IFDOOR)
137#else
138#if !defined(S_ISDOOR)
139#define S_ISDOOR(mode) (0)
140#endif
141#endif
142
143#if defined(S_IFPORT) && !defined(S_ISPORT)
144#define S_ISPORT(mode) (((mode) & S_IFMT) == S_IFPORT)
145#else
146#if !defined(S_ISPORT)
147#define S_ISPORT(mode) (0)
148#endif
149#endif
150
151#define SH_KEY_NULL _("000000000000000000000000000000000000000000000000")
152
153#undef FIL__
154#define FIL__ _("sh_unix.c")
155
156unsigned long mask_PRELINK = MASK_PRELINK_;
157unsigned long mask_USER0 = MASK_USER_;
158unsigned long mask_USER1 = MASK_USER_;
159unsigned long mask_USER2 = MASK_USER_;
160unsigned long mask_USER3 = MASK_USER_;
161unsigned long mask_USER4 = MASK_USER_;
162unsigned long mask_ALLIGNORE = MASK_ALLIGNORE_;
163unsigned long mask_ATTRIBUTES = MASK_ATTRIBUTES_;
164unsigned long mask_LOGFILES = MASK_LOGFILES_;
165unsigned long mask_LOGGROW = MASK_LOGGROW_;
166unsigned long mask_READONLY = MASK_READONLY_;
167unsigned long mask_NOIGNORE = MASK_NOIGNORE_;
168
169
170extern char **environ;
171
172int sh_unix_maskreset()
173{
174 mask_PRELINK = MASK_PRELINK_;
175 mask_USER0 = MASK_USER_;
176 mask_USER1 = MASK_USER_;
177 mask_USER2 = MASK_USER_;
178 mask_USER3 = MASK_USER_;
179 mask_USER4 = MASK_USER_;
180 mask_ALLIGNORE = MASK_ALLIGNORE_;
181 mask_ATTRIBUTES = MASK_ATTRIBUTES_;
182 mask_LOGFILES = MASK_LOGFILES_;
183 mask_LOGGROW = MASK_LOGGROW_;
184 mask_READONLY = MASK_READONLY_;
185 mask_NOIGNORE = MASK_NOIGNORE_;
186 return 0;
187}
188
189
190#ifdef SYS_SIGLIST_DECLARED
191/* extern const char * const sys_siglist[]; */
192#else
193char * sh_unix_siglist (int signum)
194{
195 switch (signum)
196 {
197#ifdef SIGHUP
198 case SIGHUP:
199 return _("Hangup");
200#endif
201#ifdef SIGINT
202 case SIGINT:
203 return _("Interrupt");
204#endif
205#ifdef SIGQUIT
206 case SIGQUIT:
207 return _("Quit");
208#endif
209#ifdef SIGILL
210 case SIGILL:
211 return _("Illegal instruction");
212#endif
213#ifdef SIGTRAP
214 case SIGTRAP:
215 return _("Trace/breakpoint trap");
216#endif
217#ifdef SIGABRT
218 case SIGABRT:
219 return _("IOT trap/Abort");
220#endif
221#ifdef SIGBUS
222 case SIGBUS:
223 return _("Bus error");
224#endif
225#ifdef SIGFPE
226 case SIGFPE:
227 return _("Floating point exception");
228#endif
229#ifdef SIGUSR1
230 case SIGUSR1:
231 return _("User defined signal 1");
232#endif
233#ifdef SIGSEGV
234 case SIGSEGV:
235 return _("Segmentation fault");
236#endif
237#ifdef SIGUSR2
238 case SIGUSR2:
239 return _("User defined signal 2");
240#endif
241#ifdef SIGPIPE
242 case SIGPIPE:
243 return _("Broken pipe");
244#endif
245#ifdef SIGALRM
246 case SIGALRM:
247 return _("Alarm clock");
248#endif
249#ifdef SIGTERM
250 case SIGTERM:
251 return _("Terminated");
252#endif
253#ifdef SIGSTKFLT
254 case SIGSTKFLT:
255 return _("Stack fault");
256#endif
257#ifdef SIGCHLD
258 case SIGCHLD:
259 return _("Child exited");
260#endif
261#ifdef SIGCONT
262 case SIGCONT:
263 return _("Continued");
264#endif
265#ifdef SIGSTOP
266 case SIGSTOP:
267 return _("Stopped");
268#endif
269#ifdef SIGTSTP
270 case SIGTSTP:
271 return _("Stop typed at tty");
272#endif
273#ifdef SIGTTIN
274 case SIGTTIN:
275 return _("Stopped (tty input)");
276#endif
277#ifdef SIGTTOU
278 case SIGTTOU:
279 return _("Stopped (tty output)");
280#endif
281#ifdef SIGURG
282 case SIGURG:
283 return _("Urgent condition");
284#endif
285#ifdef SIGXCPU
286 case SIGXCPU:
287 return _("CPU time limit exceeded");
288#endif
289#ifdef SIGXFSZ
290 case SIGXFSZ:
291 return _("File size limit exceeded");
292#endif
293#ifdef SIGVTALRM
294 case SIGVTALRM:
295 return _("Virtual time alarm");
296#endif
297#ifdef SIGPROF
298 case SIGPROF:
299 return _("Profile signal");
300#endif
301#ifdef SIGWINCH
302 case SIGWINCH:
303 return _("Window size changed");
304#endif
305#ifdef SIGIO
306 case SIGIO:
307 return _("Possible I/O");
308#endif
309#ifdef SIGPWR
310 case SIGPWR:
311 return _("Power failure");
312#endif
313#ifdef SIGUNUSED
314 case SIGUNUSED:
315 return _("Unused signal");
316#endif
317 }
318 return _("Unknown");
319}
320#endif
321
322
323/* Log from within a signal handler without using any
324 * functions that are not async signal safe.
325 *
326 * This is the safe_itoa helper function.
327 */
328char * safe_itoa(int i, char * str, int size)
329{
330 unsigned int u;
331 int iisneg = 0;
332 char *p = &str[size-1];
333
334 *p = '\0';
335 if (i < 0) {
336 iisneg = 1;
337 u = ((unsigned int)(-(1+i))) + 1;
338 } else {
339 u = i;
340 }
341 do {
342 --p;
343 *p = '0' + (u % 10);
344 u /= 10;
345 } while (u && (p != str));
346 if ((iisneg == 1) && (p != str)) {
347 --p;
348 *p = '-';
349 }
350 return p;
351}
352
353/* Log from within a signal handler without using any
354 * functions that are not async signal safe.
355 *
356 * This is the safe_logger function.
357 * Arguments: signal (signal number), method (0=logger, 1=stderr), thepid (pid)
358 */
359extern int OnlyStderr;
360
361int safe_logger (int thesignal, int method, char * details)
362{
363 unsigned int i = 0;
364 int status = -1;
365 struct stat buf;
366 pid_t newpid;
367 char str[128];
368 char * p;
369
370 char l0[64], l1[64], l2[64], l3[64];
371 char a0[32];
372 char e0[128];
373 char msg[128];
374
375 char * locations[] = { NULL, NULL, NULL, NULL, NULL };
376 char * envp[] = { NULL, NULL };
377 char * argp[] = { NULL, NULL, NULL };
378
379 pid_t thepid = getpid();
380
381 if ((sh.flag.isdaemon == S_FALSE) || (OnlyStderr == S_TRUE))
382 method = 1;
383
384 /* seems that solaris cc needs this way of initializing ...
385 */
386 locations[0] = l0;
387 locations[1] = l1;
388 locations[2] = l2;
389 locations[3] = l3;
390
391 envp[0] = e0;
392 argp[0] = a0;
393
394 sl_strlcpy(msg, _("samhain["), 128);
395 p = safe_itoa((int) thepid, str, 128);
396 if (p && *p)
397 sl_strlcat(msg, p, 128);
398 if (thesignal == 0)
399 {
400 if (details == NULL) {
401 sl_strlcat(msg, _("]: out of memory"), 128);
402 } else {
403 sl_strlcat(msg, _("]: "), 128);
404 sl_strlcat(msg, details, 128);
405 }
406 }
407 else
408 {
409 sl_strlcat(msg, _("]: exit on signal "), 128);
410 p = safe_itoa(thesignal, str, 128);
411 if (p && *p)
412 sl_strlcat(msg, p, 128);
413 }
414
415 if (method == 1) {
416#ifndef STDERR_FILENO
417#define STDERR_FILENO 2
418#endif
419 int retval = 0;
420 do {
421 retval = write(STDERR_FILENO, msg, strlen(msg));
422 } while (retval < 0 && errno == EINTR);
423 do {
424 retval = write(STDERR_FILENO, "\n", 1);
425 } while (retval < 0 && errno == EINTR);
426 return 0;
427 }
428
429 sl_strlcpy (l0, _("/usr/bin/logger"), 64);
430 sl_strlcpy (l1, _("/usr/sbin/logger"), 64);
431 sl_strlcpy (l2, _("/usr/ucb/logger"), 64);
432 sl_strlcpy (l3, _("/bin/logger"), 64);
433
434 sl_strlcpy (a0, _("logger"), 32);
435 sl_strlcpy (e0,
436 _("PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/ucb:/usr/local/bin"),
437 128);
438
439 while (locations[i] != NULL) {
440 status = stat(locations[i], &buf);
441 if (status == 0)
442 break;
443 ++i;
444 }
445
446 if (locations[i] != NULL) {
447 argp[1] = msg;
448 newpid = fork();
449 if (newpid == 0) {
450 execve(locations[i], argp, envp);
451 _exit(1);
452 }
453 else if (newpid > 0) {
454 waitpid(newpid, &status, WUNTRACED);
455 }
456 }
457 return 0;
458}
459
460void safe_fatal (const char * details,
461 const char * file, int line)
462{
463 char msg[128];
464 char str[128];
465 char * p;
466 int thesignal = 0;
467 int method = 0;
468
469 p = safe_itoa((int) line, str, 128);
470 sl_strlcpy(msg, _("FATAL: "), 128);
471 sl_strlcat(msg, file, 128);
472 sl_strlcat(msg, ": ", 128);
473 if (p && (*p)) {
474 sl_strlcat(msg, p , 128);
475 sl_strlcat(msg, ": ", 128);
476 }
477 sl_strlcat(msg, details, 128);
478 (void) safe_logger (thesignal, method, msg);
479
480 close_ipc ();
481 raise(SIGKILL);
482}
483
484extern char sh_sig_msg[64];
485
486volatile int immediate_exit_normal = 0;
487
488#if defined(SA_SIGACTION_WORKS)
489static
490void sh_unix_sigexit (int mysignal, siginfo_t * signal_info, void * signal_add)
491#else
492static
493void sh_unix_sigexit (int mysignal)
494#endif
495{
496
497#if defined(SA_SIGACTION_WORKS)
498 if (signal_info != NULL && signal_info->si_code == SI_USER &&
499 mysignal != SIGTERM && mysignal != SIGINT)
500 {
501 return;
502 }
503
504 /* avoid compiler warning (unused var)
505 */
506 (void) signal_add;
507#endif
508
509 /*
510 * Block re-entry
511 */
512 if (immediate_exit_normal > 0)
513 {
514 ++immediate_exit_normal;
515 if ((skey != NULL) && (immediate_exit_normal == 2))
516 memset (skey, '\0', sizeof(sh_key_t));
517 if (immediate_exit_normal == 2)
518 {
519 int val_return;
520
521 do {
522 val_return = chdir ("/");
523 } while (val_return < 0 && errno == EINTR);
524
525 close_ipc ();
526 safe_logger (mysignal, 0, NULL);
527 }
528 raise(SIGKILL);
529 }
530 else
531 {
532 immediate_exit_normal = 1;
533 }
534
535#ifdef SYS_SIGLIST_DECLARED
536 strncpy (sh_sig_msg, sys_siglist[mysignal], 40);
537#else
538 strncpy (sh_sig_msg, sh_unix_siglist(mysignal), 40);
539#endif
540 sh_sig_msg[63] = '\0';
541
542 ++sig_raised;
543 ++sig_urgent;
544 sig_termfast = 1;
545 return;
546}
547
548volatile int immediate_exit_fast = 0;
549
550#if defined(SA_SIGACTION_WORKS)
551static
552void sh_unix_sigexit_fast (int mysignal, siginfo_t * signal_info,
553 void * signal_add)
554#else
555static
556void sh_unix_sigexit_fast (int mysignal)
557#endif
558{
559#if defined(SL_DEBUG) && (defined(USE_SYSTEM_MALLOC) || !defined(USE_MALLOC_LOCK))
560 int retval;
561#endif
562
563#if defined(SA_SIGACTION_WORKS)
564 if (signal_info != NULL && signal_info->si_code == SI_USER)
565 {
566 return;
567 }
568#endif
569
570 /* avoid compiler warning (unused var)
571 */
572#if defined(SA_SIGACTION_WORKS)
573 (void) signal_add;
574#endif
575
576 /* Check whether the heap is ok; otherwise _exit
577 */
578#if !defined(SL_DEBUG) || (!defined(USE_SYSTEM_MALLOC) && defined(USE_MALLOC_LOCK))
579 ++immediate_exit_fast;
580 if (skey != NULL && immediate_exit_fast < 2)
581 memset (skey, '\0', sizeof(sh_key_t));
582 if (immediate_exit_fast < 2)
583 safe_logger (mysignal, 0, NULL);
584 raise(SIGKILL);
585#else
586
587 /* debug code
588 */
589 if (immediate_exit_fast == 1)
590 {
591 ++immediate_exit_fast;
592 if (skey != NULL)
593 memset (skey, '\0', sizeof(sh_key_t));
594 close_ipc ();
595 safe_logger (mysignal, 0, NULL);
596 do {
597 retval = chdir ("/");
598 } while (retval < 0 && errno == EINTR);
599 raise(SIGFPE);
600 }
601 else if (immediate_exit_fast == 2)
602 {
603 do {
604 retval = chdir ("/");
605 } while (retval < 0 && errno == EINTR);
606 raise(SIGFPE);
607 }
608 else if (immediate_exit_fast != 0)
609 {
610 raise(SIGKILL);
611 }
612
613 ++immediate_exit_fast;
614
615 /* The FPE|BUS|SEGV|ILL signals leave the system in an undefined
616 * state, thus it is best to exit immediately.
617 */
618#ifdef SYS_SIGLIST_DECLARED
619 strncpy (sh_sig_msg, sys_siglist[mysignal], 40);
620#else
621 strncpy (sh_sig_msg, sh_unix_siglist(mysignal), 40);
622#endif
623 sh_sig_msg[63] = '\0';
624
625 sl_stack_print();
626
627 /* Try to push out an error message.
628 */
629 sh_error_handle ((-1), FIL__, __LINE__, mysignal, MSG_EXIT_NORMAL,
630 sh.prg_name, sh_sig_msg);
631
632 if (skey != NULL)
633 memset (skey, '\0', sizeof(sh_key_t));
634 close_ipc ();
635
636 do {
637 retval = chdir ("/");
638 } while (retval < 0 && errno == EINTR);
639
640 raise(SIGFPE);
641#endif
642}
643
644
645static
646void sh_unix_sigaction (int mysignal)
647{
648 ++sig_raised;
649#ifdef SIGUSR1
650 if (mysignal == SIGUSR1)
651 sig_debug_switch = 1;
652#endif
653#ifdef SIGUSR2
654 if (mysignal == SIGUSR2)
655 {
656 ++sig_suspend_switch;
657 ++sig_urgent;
658 }
659#endif
660#ifdef SIGHUP
661 if (mysignal == SIGHUP)
662 sig_config_read_again = 1;
663#endif
664#ifdef SIGTTOU
665 if (mysignal == SIGTTOU) {
666 sig_force_check = 1; sh_sem_trylock(); }
667#endif
668#ifdef SIGTSTP
669 if (mysignal == SIGTSTP) {
670 sig_force_check = 1; sig_force_silent = 1; sh_sem_trylock(); }
671#endif
672#ifdef SIGTTIN
673 if (mysignal == SIGTTIN)
674 sig_fresh_trail = 1;
675#endif
676#ifdef SIGABRT
677 if (mysignal == SIGABRT)
678 sig_fresh_trail = 1;
679#endif
680#ifdef SIGQUIT
681 if (mysignal == SIGQUIT)
682 sig_terminate = 1;
683#endif
684#ifdef SIGTERM
685 if (mysignal == SIGTERM)
686 {
687 strncpy (sh_sig_msg, _("Terminated"), 40);
688 sig_termfast = 1;
689 ++sig_urgent;
690 }
691#endif
692
693 return;
694}
695
696void sh_unix_ign_sigpipe()
697{
698 struct sigaction ignact;
699
700 ignact.sa_handler = SIG_IGN; /* signal action */
701 sigemptyset( &ignact.sa_mask ); /* set an empty mask */
702 ignact.sa_flags = 0; /* init sa_flags */
703
704#ifdef SIGPIPE
705 retry_sigaction(FIL__, __LINE__, SIGPIPE, &ignact, NULL);
706#endif
707
708 return;
709}
710static
711void sh_unix_siginstall (int goDaemon)
712{
713 struct sigaction act, act_fast, act2, oldact, ignact;
714#if defined (SH_WITH_SERVER)
715 (void) goDaemon;
716#endif
717
718 SL_ENTER(_("sh_unix_siginstall"));
719
720 ignact.sa_handler = SIG_IGN; /* signal action */
721 sigemptyset( &ignact.sa_mask ); /* set an empty mask */
722 ignact.sa_flags = 0; /* init sa_flags */
723
724#if defined(SA_SIGACTION_WORKS)
725 act.sa_sigaction = &sh_unix_sigexit; /* signal action */
726#else
727 act.sa_handler = &sh_unix_sigexit; /* signal action */
728#endif
729
730 sigfillset ( &act.sa_mask ); /* set a full mask */
731
732
733 /* Block all but deadly signals.
734 */
735#ifdef SIGILL
736 sigdelset ( &act.sa_mask, SIGILL );
737#endif
738#ifndef SL_DEBUG
739#ifdef SIGFPE
740 sigdelset ( &act.sa_mask, SIGFPE );
741#endif
742#endif
743#ifdef SIGSEGV
744 sigdelset ( &act.sa_mask, SIGSEGV );
745#endif
746#ifdef SIGBUS
747 sigdelset ( &act.sa_mask, SIGBUS );
748#endif
749
750#if defined(SA_SIGACTION_WORKS)
751 act_fast.sa_sigaction = &sh_unix_sigexit_fast; /* signal action */
752#else
753 act_fast.sa_handler = &sh_unix_sigexit_fast; /* signal action */
754#endif
755
756 sigfillset ( &act_fast.sa_mask ); /* set a full mask */
757
758#ifdef SIGILL
759 sigdelset ( &act_fast.sa_mask, SIGILL );
760#endif
761#ifndef SL_DEBUG
762#ifdef SIGFPE
763 sigdelset ( &act_fast.sa_mask, SIGFPE );
764#endif
765#endif
766#ifdef SIGSEGV
767 sigdelset ( &act_fast.sa_mask, SIGSEGV );
768#endif
769#ifdef SIGBUS
770 sigdelset ( &act_fast.sa_mask, SIGBUS );
771#endif
772
773
774 /* Use siginfo to verify origin of signal, if possible.
775 */
776#if defined(SA_SIGACTION_WORKS)
777 act.sa_flags = SA_SIGINFO;
778 act_fast.sa_flags = SA_SIGINFO;
779#else
780 act.sa_flags = 0;
781 act_fast.sa_flags = 0;
782#endif
783
784 /* Do not block the signal from being received in its handler ...
785 * (is this a good or a bad idea ??).
786 */
787#if defined(SA_NOMASK)
788 act_fast.sa_flags |= SA_NOMASK;
789#elif defined(SA_NODEFER)
790 act_fast.sa_flags |= SA_NODEFER;
791#endif
792
793
794 act2.sa_handler = &sh_unix_sigaction; /* signal action */
795 sigemptyset( &act2.sa_mask ); /* set an empty mask */
796 act2.sa_flags = 0; /* init sa_flags */
797
798 /* signals to control the daemon */
799
800#ifdef SIGHUP
801 retry_sigaction(FIL__, __LINE__, SIGHUP, &act2, &oldact);
802#endif
803#ifdef SIGABRT
804 retry_sigaction(FIL__, __LINE__, SIGABRT, &act2, &oldact);
805#endif
806#ifdef SIGUSR1
807 retry_sigaction(FIL__, __LINE__, SIGUSR1, &act2, &oldact);
808#endif
809#ifdef SIGUSR2
810 retry_sigaction(FIL__, __LINE__, SIGUSR2, &act2, &oldact);
811#endif
812#ifdef SIGQUIT
813 retry_sigaction(FIL__, __LINE__, SIGQUIT, &act2, &oldact);
814#endif
815#ifdef SIGTERM
816 retry_sigaction(FIL__, __LINE__, SIGTERM, &act, &oldact);
817#endif
818
819 /* fatal signals that may cause termination */
820
821#ifdef SIGILL
822 retry_sigaction(FIL__, __LINE__, SIGILL, &act_fast, &oldact);
823#endif
824#ifndef SL_DEBUG
825#ifdef SIGFPE
826 retry_sigaction(FIL__, __LINE__, SIGFPE, &act_fast, &oldact);
827#endif
828#endif
829#ifdef SIGSEGV
830 retry_sigaction(FIL__, __LINE__, SIGSEGV, &act_fast, &oldact);
831#endif
832#ifdef SIGBUS
833 retry_sigaction(FIL__, __LINE__, SIGBUS, &act_fast, &oldact);
834#endif
835
836 /* other signals */
837
838#ifdef SIGINT
839 retry_sigaction(FIL__, __LINE__, SIGINT, &act, &oldact);
840#endif
841#ifdef SIGPIPE
842 retry_sigaction(FIL__, __LINE__, SIGPIPE, &ignact, &oldact);
843#endif
844#ifdef SIGALRM
845 retry_sigaction(FIL__, __LINE__, SIGALRM, &ignact, &oldact);
846#endif
847
848#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
849#ifdef SIGTTOU
850 if (goDaemon == 1)
851 retry_sigaction(FIL__, __LINE__, SIGTTOU, &act2, &oldact);
852 else
853 retry_sigaction(FIL__, __LINE__, SIGTTOU, &ignact, &oldact);
854#endif
855#ifdef SIGTSTP
856 if (goDaemon == 1)
857 retry_sigaction(FIL__, __LINE__, SIGTSTP, &act2, &oldact);
858 else
859 retry_sigaction(FIL__, __LINE__, SIGTSTP, &ignact, &oldact);
860#endif
861#ifdef SIGTTIN
862 if (goDaemon == 1)
863 retry_sigaction(FIL__, __LINE__, SIGTTIN, &act2, &oldact);
864 else
865 retry_sigaction(FIL__, __LINE__, SIGTTIN, &ignact, &oldact);
866#endif
867#else
868#ifdef SIGTSTP
869 retry_sigaction(FIL__, __LINE__, SIGTSTP, &ignact, &oldact);
870#endif
871#ifdef SIGTTOU
872 retry_sigaction(FIL__, __LINE__, SIGTTOU, &ignact, &oldact);
873#endif
874#ifdef SIGTTIN
875 retry_sigaction(FIL__, __LINE__, SIGTTIN, &ignact, &oldact);
876#endif
877#endif
878
879#ifdef SIGTRAP
880#if !defined(SCREW_IT_UP)
881 retry_sigaction(FIL__, __LINE__, SIGTRAP, &act, &oldact);
882#endif
883#endif
884
885#ifdef SIGPOLL
886 retry_sigaction(FIL__, __LINE__, SIGPOLL, &ignact, &oldact);
887#endif
888#if defined(SIGPROF) && !defined(SH_PROFILE)
889 retry_sigaction(FIL__, __LINE__, SIGPROF, &ignact, &oldact);
890#endif
891#ifdef SIGSYS
892 retry_sigaction(FIL__, __LINE__, SIGSYS, &act, &oldact);
893#endif
894#ifdef SIGURG
895 retry_sigaction(FIL__, __LINE__, SIGURG, &ignact, &oldact);
896#endif
897#if defined(SIGVTALRM) && !defined(SH_PROFILE)
898 retry_sigaction(FIL__, __LINE__, SIGVTALRM, &ignact, &oldact);
899#endif
900#ifdef SIGXCPU
901 retry_sigaction(FIL__, __LINE__, SIGXCPU, &act, &oldact);
902#endif
903#ifdef SIGXFSZ
904 retry_sigaction(FIL__, __LINE__, SIGXFSZ, &act, &oldact);
905#endif
906
907#ifdef SIGEMT
908 retry_sigaction(FIL__, __LINE__, SIGEMT, &ignact, &oldact);
909#endif
910#ifdef SIGSTKFLT
911 retry_sigaction(FIL__, __LINE__, SIGSTKFLT, &act, &oldact);
912#endif
913#ifdef SIGIO
914 retry_sigaction(FIL__, __LINE__, SIGIO, &ignact, &oldact);
915#endif
916#ifdef SIGPWR
917 retry_sigaction(FIL__, __LINE__, SIGPWR, &act, &oldact);
918#endif
919
920#ifdef SIGLOST
921 retry_sigaction(FIL__, __LINE__, SIGLOST, &ignact, &oldact);
922#endif
923#ifdef SIGUNUSED
924 retry_sigaction(FIL__, __LINE__, SIGUNUSED, &ignact, &oldact);
925#endif
926
927 SL_RET0(_("sh_unix_siginstall"));
928}
929
930/* ---------------------------------------------------------------- */
931
932/* checksum the own binary
933 */
934int sh_unix_self_hash (const char * c)
935{
936 char message[512];
937 char hashbuf[KEYBUF_SIZE];
938
939 SL_ENTER(_("sh_unix_self_hash"));
940
941 if (c == NULL)
942 {
943 sh.exec.path[0] = '\0';
944 SL_RETURN((0), _("sh_unix_self_hash"));
945 }
946 sl_strlcpy(sh.exec.path, c, SH_PATHBUF);
947
948 sl_strlcpy(sh.exec.hash,
949 sh_tiger_hash (c, TIGER_FILE, TIGER_NOLIM, hashbuf, sizeof(hashbuf)),
950 KEY_LEN+1);
951 sl_snprintf(message, 512, _("%s has checksum: %s"),
952 sh.exec.path, sh.exec.hash);
953 message[511] = '\0';
954 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
955 message, _("sh_unix_self_hash"));
956 if (0 == sl_strcmp(sh.exec.hash, SH_KEY_NULL ))
957 {
958 dlog(1, FIL__, __LINE__,
959 _("Could not checksum my own executable because of the\nfollowing error: %s: %s\n\nPossible reasons include:\n Wrong path in configure file option SamhainPath=/path/to/executable\n No read permission for the effective UID: %d\n"),
960 sh.exec.path, sl_get_errmsg(), (int) sl_ret_euid());
961 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_NOACCESS,
962 (long) sh.real.uid, c);
963 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
964 }
965 SL_RETURN((0), _("sh_unix_self_hash"));
966}
967
968int sh_unix_self_check ()
969{
970 char newhash[KEY_LEN+1];
971 char message[512];
972 char hashbuf[KEYBUF_SIZE];
973
974 SL_ENTER(_("sh_unix_self_check"));
975 if (sh.exec.path[0] == '\0')
976 SL_RETURN((0), _("sh_unix_self_check"));
977
978 sl_strlcpy(newhash,
979 sh_tiger_hash (sh.exec.path, TIGER_FILE, TIGER_NOLIM, hashbuf, sizeof(hashbuf)),
980 KEY_LEN+1);
981 if (0 == sl_strncmp(sh.exec.hash, newhash, KEY_LEN))
982 {
983 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
984 _("Checksum ok"), _("sh_unix_self_check"));
985 SL_RETURN((0), _("sh_unix_self_check"));
986 }
987
988 if (0 == sl_strncmp(SH_KEY_NULL, newhash, KEY_LEN))
989 {
990 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
991 _("Could not read samhain executable"), _("sh_unix_self_check"));
992 SL_RETURN((0), _("sh_unix_self_check"));
993 }
994
995 dlog(1, FIL__, __LINE__,
996 _("The checksum of the executable: %s has changed since startup (%s -> %s).\n"),
997 sh.exec.path, sh.exec.hash, newhash);
998
999 sl_snprintf(message, 512,
1000 _("The checksum of %s has changed since startup (%s -> %s)"),
1001 sh.exec.path, sh.exec.hash, newhash);
1002 message[511] = '\0';
1003
1004 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1005 message, _("sh_unix_self_check"));
1006 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_E_AUTH,
1007 sh.exec.path);
1008 SL_RETURN((-1), _("sh_unix_self_check"));
1009}
1010
1011
1012/* ---------------------------------------------------------------- */
1013
1014long sh_group_to_gid (const char * g, int * fail)
1015{
1016 struct group * w;
1017 gid_t gid = 0;
1018 int status = 0;
1019
1020#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1021 struct group grp;
1022 char * buffer;
1023 static size_t gbufsize = SH_GRBUF_SIZE;
1024#endif
1025
1026 *fail = -1;
1027
1028 if (g)
1029 {
1030 size_t i;
1031 size_t len = strlen(g);
1032
1033 *fail = 0;
1034
1035 for (i = 0; i < len; ++i)
1036 {
1037 char c = g[i];
1038
1039 if (!isdigit((int) c))
1040 goto is_a_name;
1041 }
1042 return atol(g);
1043
1044 is_a_name:
1045
1046#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1047
1048 buffer = SH_ALLOC(gbufsize);
1049 status = sh_getgrnam_r(g, &grp, buffer, gbufsize, &w);
1050
1051 if ((status == ERANGE) && (w == NULL))
1052 {
1053 if (S_TRUE == sl_ok_adds( gbufsize, SH_GRBUF_SIZE ))
1054 {
1055 SH_FREE(buffer);
1056 gbufsize += SH_GRBUF_SIZE;
1057 goto is_a_name;
1058 }
1059 }
1060
1061#else
1062
1063 errno = 0;
1064 w = sh_getgrnam(g);
1065 status = errno;
1066
1067#endif
1068
1069 if ((status == ERANGE) && (w == NULL))
1070 {
1071 static int seen = 0;
1072
1073 if (seen == 0)
1074 {
1075 char errbuf[SH_ERRBUF_SIZE];
1076
1077 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
1078 sh_error_message(status, errbuf, sizeof(errbuf)),
1079 _("sh_group_to_gid"), (long) -1, _("line too long in group entry"));
1080 ++seen;
1081 }
1082 *fail = -1;
1083 }
1084 else if (w == NULL)
1085 {
1086 char * tmp = sh_util_strdup(g);
1087 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1088 _("sh_group_to_gid"), tmp);
1089 SH_FREE(tmp);
1090 *fail = -1;
1091 }
1092 else
1093 {
1094 gid = w->gr_gid;
1095 }
1096#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1097 SH_FREE(buffer);
1098#endif
1099 }
1100
1101 return gid;
1102}
1103
1104/* ---------------------------------------------------------------- */
1105
1106
1107/* added Tue Feb 22 10:36:44 NFT 2000 Rainer Wichmann */
1108static int tf_add_trusted_user_int(const char * c)
1109{
1110 struct passwd * w;
1111 int count;
1112 uid_t pwid = (uid_t)-1;
1113
1114#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1115 struct passwd pwd;
1116 char * buffer;
1117#endif
1118
1119 SL_ENTER(_("tf_add_trusted_user_int"));
1120
1121 /* First check for a user name.
1122 */
1123#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1124 buffer = SH_ALLOC(SH_PWBUF_SIZE);
1125 sh_getpwnam_r(c, &pwd, buffer, SH_PWBUF_SIZE, &w);
1126#else
1127 w = sh_getpwnam(c);
1128#endif
1129
1130 if ((w != NULL) && ((pwid = w->pw_uid) > 0))
1131 goto succe;
1132
1133 /* Failed, so check for a numerical value.
1134 */
1135 pwid = strtol(c, (char **)NULL, 10);
1136 if (pwid > 0 && pwid < 65535)
1137 goto succe;
1138
1139 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1140 _("add trusted user"), c);
1141#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1142 SH_FREE(buffer);
1143#endif
1144 SL_RETURN((-1), _("tf_add_trusted_user_int"));
1145
1146 succe:
1147 count = sl_trust_add_user(pwid);
1148#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1149 SH_FREE(buffer);
1150#endif
1151 SL_RETURN((count), _("tf_add_trusted_user_int"));
1152}
1153
1154int tf_add_trusted_user(const char * c)
1155{
1156 int i;
1157 char * q;
1158 char * p = sh_util_strdup (c);
1159#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1160 char * saveptr;
1161#endif
1162
1163 SL_ENTER(_("tf_add_trusted_user"));
1164
1165#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1166 q = strtok_r(p, ", \t", &saveptr);
1167#else
1168 q = strtok(p, ", \t");
1169#endif
1170 if (!q)
1171 {
1172 SH_FREE(p);
1173 SL_RETURN((-1), _("tf_add_trusted_user"));
1174 }
1175 while (q)
1176 {
1177 i = tf_add_trusted_user_int(q);
1178 if (SL_ISERROR(i))
1179 {
1180 SH_FREE(p);
1181 SL_RETURN((i), _("tf_add_trusted_user"));
1182 }
1183#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1184 q = strtok_r(NULL, ", \t", &saveptr);
1185#else
1186 q = strtok(NULL, ", \t");
1187#endif
1188 }
1189 SH_FREE(p);
1190 SL_RETURN((0), _("tf_add_trusted_user"));
1191}
1192
1193extern uid_t sl_trust_baduid(void);
1194extern gid_t sl_trust_badgid(void);
1195
1196#if defined(HOST_IS_CYGWIN) || defined(__cygwin__) || defined(__CYGWIN32__) || defined(__CYGWIN__)
1197int tf_trust_check (const char * file, int mode)
1198{
1199 (void) file;
1200 (void) mode;
1201 return 0;
1202}
1203#else
1204int tf_trust_check (const char * file, int mode)
1205{
1206 char * tmp;
1207 char * tmp2;
1208 char * p;
1209 int status;
1210 int level;
1211 uid_t ff_euid = (uid_t) -1;
1212 uid_t baduid;
1213 gid_t badgid;
1214
1215 SL_ENTER(_("tf_trust_check"));
1216
1217 if (mode == SL_YESPRIV)
1218 sl_get_euid(&ff_euid);
1219 else
1220 sl_get_ruid(&ff_euid);
1221
1222#if defined(SH_WITH_SERVER)
1223 if (0 == sl_ret_euid()) /* privileges not dropped yet */
1224 {
1225#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1226 struct passwd pwd;
1227 char * buffer = SH_ALLOC(SH_PWBUF_SIZE);
1228 struct passwd * tempres;
1229 sh_getpwnam_r(DEFAULT_IDENT, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
1230#else
1231 struct passwd * tempres = sh_getpwnam(DEFAULT_IDENT);
1232#endif
1233
1234 if (!tempres)
1235 {
1236 dlog(1, FIL__, __LINE__,
1237 _("User %s does not exist. Please add the user to your system.\n"),
1238 DEFAULT_IDENT);
1239 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
1240 }
1241 else
1242 {
1243 ff_euid = tempres->pw_uid;
1244 }
1245#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1246 SH_FREE(buffer);
1247#endif
1248 }
1249#endif
1250
1251 status = sl_trustfile_euid(file, ff_euid);
1252
1253 if ( SL_ENONE != status)
1254 {
1255 if (status == SL_ESTAT)
1256 level = SH_ERR_ALL;
1257 else
1258 level = SH_ERR_ERR;
1259
1260 tmp = sh_util_safe_name (file);
1261 p = sh_util_strdup(sl_trust_errfile());
1262 baduid = sl_trust_baduid();
1263 badgid = sl_trust_badgid();
1264
1265 if (p && *p != '\0')
1266 {
1267 tmp2 = sh_util_safe_name (p);
1268 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST2,
1269 sl_error_string(status), tmp, tmp2);
1270 SH_FREE(tmp2);
1271 }
1272 else
1273 {
1274 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST1,
1275 sl_error_string(status), tmp);
1276 }
1277
1278 if (status == SL_EBADUID || status == SL_EBADGID ||
1279 status == SL_EBADOTH || status == SL_ETRUNC ||
1280 status == SL_EINTERNAL )
1281 {
1282 switch (status) {
1283 case SL_EINTERNAL:
1284 dlog(1, FIL__, __LINE__,
1285 _("An internal error occured in the trustfile function.\n"));
1286 break;
1287 case SL_ETRUNC:
1288 dlog(1, FIL__, __LINE__,
1289 _("A filename truncation occured in the trustfile function.\nProbably the normalized filename for %s\nis too long. This may be due e.g. to deep or circular softlinks.\n"),
1290 tmp);
1291 break;
1292 case SL_EBADOTH:
1293 dlog(1, FIL__, __LINE__,
1294 _("The path element: %s\nin the filename: %s is world writeable.\n"),
1295 (p) ? p : _("(null)"), tmp);
1296 break;
1297 case SL_EBADUID:
1298 dlog(1, FIL__, __LINE__,
1299 _("The owner (UID = %ld) of the path element: %s\nin the filename: %s\nis not in the list of trusted users.\nTo fix the problem, you can:\n - run ./configure again with the option --with-trusted=0,...,UID\n where UID is the UID of the untrusted user, or\n - use the option TrustedUser=UID in the configuration file.\n"),
1300 (UID_CAST)baduid, (p) ? p : _("(null)"), tmp);
1301 break;
1302 case SL_EBADGID:
1303 dlog(1, FIL__, __LINE__,
1304 _("The path element: %s\nin the filename: %s\nis group writeable (GID = %ld), and at least one of the group\nmembers (UID = %ld) is not in the list of trusted users.\nTo fix the problem, you can:\n - run ./configure again with the option --with-trusted=0,...,UID\n where UID is the UID of the untrusted user, or\n - use the option TrustedUser=UID in the configuration file.\n"),
1305 (p) ? p : _("(null)"), tmp, (UID_CAST)badgid,
1306 (UID_CAST)baduid);
1307 break;
1308 default:
1309 break;
1310 }
1311 SH_FREE(tmp);
1312 if (p) SH_FREE(p);
1313 SL_RETURN((-1), _("tf_trust_check"));
1314 }
1315 else {
1316 SH_FREE(tmp);
1317 if (p) SH_FREE(p);
1318 }
1319 }
1320
1321 SL_RETURN((0), _("tf_trust_check"));
1322}
1323#endif
1324
1325#ifdef HAVE_INITGROUPS
1326#ifdef HOST_IS_OSF
1327int sh_unix_initgroups ( char * in_user, gid_t in_gid)
1328#else
1329int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1330#endif
1331{
1332 int status = -1;
1333 status = sh_initgroups (in_user, in_gid);
1334 if (status < 0)
1335 {
1336 if (errno == EPERM)
1337 return 0;
1338 if (errno == EINVAL)
1339 return 0;
1340 return -1;
1341 }
1342 return 0;
1343}
1344#else
1345int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1346{
1347 (void) in_user;
1348 (void) in_gid;
1349 return 0;
1350}
1351#endif
1352
1353#ifdef HAVE_INITGROUPS
1354char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len);
1355int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1356{
1357 int status = -1;
1358 char user[SH_MINIBUF];
1359
1360 SL_ENTER(_("sh_unix_initgroups2"));
1361
1362 if (NULL == sh_unix_getUIDname (SH_ERR_ERR, in_pid, user, sizeof(user)))
1363 SL_RETURN((-1), _("sh_unix_initgroups2"));
1364 status = sh_initgroups (user, in_gid);
1365 if (status < 0)
1366 {
1367 if (errno == EPERM)
1368 status = 0;
1369 if (errno == EINVAL)
1370 status = 0;
1371 }
1372 SL_RETURN((status), _("sh_unix_initgroups2"));
1373}
1374#else
1375int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1376{
1377 (void) in_pid;
1378 (void) in_gid;
1379 return 0;
1380}
1381#endif
1382
1383void sh_unix_closeall (int fd, int except, int inchild)
1384{
1385 int fdx = fd;
1386#ifdef _SC_OPEN_MAX
1387 int fdlimit = sysconf (_SC_OPEN_MAX);
1388#else
1389#ifdef OPEN_MAX
1390 int fdlimit = OPEN_MAX;
1391#else
1392 int fdlimit = _POSIX_OPEN_MAX;
1393#endif
1394#endif
1395
1396 SL_ENTER(_("sh_unix_closeall"));
1397
1398 /* can't happen - so fix it :-(
1399 */
1400 if (fdlimit < 0)
1401 fdlimit = 20; /* POSIX lower limit */
1402
1403 if (fdlimit > 65536)
1404 fdlimit = 65536;
1405
1406 if (!inchild)
1407 sl_dropall (fdx, except);
1408 else
1409 sl_dropall_dirty (fdx, except);
1410
1411 /* Close everything from fd (inclusive) up to fdlimit (exclusive).
1412 */
1413 while (fd < fdlimit)
1414 {
1415 if (fd == except)
1416 fd++;
1417 else if (slib_do_trace != 0 && fd == slib_trace_fd)
1418 fd++;
1419 else
1420 sl_close_fd(FIL__, __LINE__, fd++);
1421 }
1422
1423 SL_RET0(_("sh_unix_closeall"));
1424}
1425
1426static void sh_unix_setlimits(void)
1427{
1428 struct rlimit limits;
1429
1430 SL_ENTER(_("sh_unix_setlimits"));
1431
1432 limits.rlim_cur = RLIM_INFINITY;
1433 limits.rlim_max = RLIM_INFINITY;
1434
1435#ifdef RLIMIT_CPU
1436 setrlimit (RLIMIT_CPU, &limits);
1437#endif
1438#ifdef RLIMIT_FSIZE
1439 setrlimit (RLIMIT_FSIZE, &limits);
1440#endif
1441#ifdef RLIMIT_DATA
1442 setrlimit (RLIMIT_DATA, &limits);
1443#endif
1444#ifdef RLIMIT_STACK
1445 setrlimit (RLIMIT_STACK, &limits);
1446#endif
1447#ifdef RLIMIT_RSS
1448 setrlimit (RLIMIT_RSS, &limits);
1449#endif
1450#ifdef RLIMIT_NPROC
1451 setrlimit (RLIMIT_NPROC, &limits);
1452#endif
1453#ifdef RLIMIT_MEMLOCK
1454 setrlimit (RLIMIT_MEMLOCK, &limits);
1455#endif
1456
1457#if !defined(SL_DEBUG)
1458 /* no core dumps
1459 */
1460 limits.rlim_cur = 0;
1461 limits.rlim_max = 0;
1462#ifdef RLIMIT_CORE
1463 setrlimit (RLIMIT_CORE, &limits);
1464#endif
1465#else
1466#ifdef RLIMIT_CORE
1467 setrlimit (RLIMIT_CORE, &limits);
1468#endif
1469#endif
1470
1471 limits.rlim_cur = 1024;
1472 limits.rlim_max = 1024;
1473
1474#if defined(RLIMIT_NOFILE)
1475 setrlimit (RLIMIT_NOFILE, &limits);
1476#elif defined(RLIMIT_OFILE)
1477 setrlimit (RLIMIT_OFILE, &limits);
1478#endif
1479
1480 SL_RET0(_("sh_unix_setlimits"));
1481}
1482
1483static void sh_unix_copyenv(void)
1484{
1485 char ** env0 = environ;
1486 char ** env1;
1487 int envlen = 0;
1488 size_t len;
1489
1490 SL_ENTER(_("sh_unix_copyenv"));
1491
1492 while (env0 != NULL && env0[envlen] != NULL) {
1493 /* printf("%2d: %s\n", envlen, env0[envlen]); */
1494 ++envlen;
1495 }
1496 ++envlen;
1497
1498 /* printf("-> %2d: slots allocated\n", envlen); */
1499 env1 = calloc(1,sizeof(char *) * envlen); /* only once */
1500 if (env1 == NULL)
1501 {
1502 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1503 SL_RET0(_("sh_unix_copyenv"));
1504 }
1505 env0 = environ;
1506 envlen = 0;
1507
1508 while (env0 != NULL && env0[envlen] != NULL) {
1509 len = strlen(env0[envlen]) + 1;
1510 env1[envlen] = calloc(1,len); /* only once */
1511 if (env1[envlen] == NULL)
1512 {
1513 int i;
1514 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1515 for (i = 0; i < envlen; ++i) free(env1[len]);
1516 free(env1);
1517 SL_RET0(_("sh_unix_copyenv"));
1518 }
1519 sl_strlcpy(env1[envlen], env0[envlen], len);
1520 ++envlen;
1521 }
1522 env1[envlen] = NULL;
1523
1524 environ = env1;
1525 SL_RET0(_("sh_unix_copyenv"));
1526}
1527
1528/* delete all environment variables
1529 */
1530static void sh_unix_zeroenv(void)
1531{
1532 char * c;
1533 char ** env;
1534
1535 SL_ENTER(_("sh_unix_zeroenv"));
1536
1537 sh_unix_copyenv();
1538 env = environ;
1539
1540 while (env != NULL && *env != NULL) {
1541 c = strchr ((*env), '=');
1542#ifdef WITH_MYSQL
1543 /*
1544 * Skip the MYSQL_UNIX_PORT environment variable; MySQL may need it.
1545 */
1546 if (0 == sl_strncmp((*env), _("MYSQL_UNIX_PORT="), 16))
1547 {
1548 ++(env);
1549 continue;
1550 }
1551 if (0 == sl_strncmp((*env), _("MYSQL_TCP_PORT="), 15))
1552 {
1553 ++(env);
1554 continue;
1555 }
1556 if (0 == sl_strncmp((*env), _("MYSQL_HOME="), 11))
1557 {
1558 ++(env);
1559 continue;
1560 }
1561#endif
1562#ifdef WITH_ORACLE
1563 /*
1564 * Skip the ORACLE_HOME and TNS_ADMIN environment variables;
1565 * Oracle may need them.
1566 */
1567 if (0 == sl_strncmp((*env), _("ORACLE_HOME="), 12))
1568 {
1569 ++(env);
1570 continue;
1571 }
1572 if (0 == sl_strncmp((*env), _("TNS_ADMIN="), 10))
1573 {
1574 ++(env);
1575 continue;
1576 }
1577#endif
1578 /*
1579 * Skip the TZ environment variable.
1580 */
1581 if (0 == sl_strncmp((*env), _("TZ="), 3))
1582 {
1583 ++(env);
1584 continue;
1585 }
1586 ++(env);
1587 if (c != NULL)
1588 {
1589 ++c;
1590 while ((*c) != '\0') {
1591 (*c) = '\0';
1592 ++c;
1593 }
1594 }
1595 }
1596
1597#ifdef HAVE_TZSET
1598 tzset();
1599#endif
1600
1601 SL_RET0(_("sh_unix_zeroenv"));
1602}
1603
1604
1605static void sh_unix_resettimer(void)
1606{
1607 struct itimerval this_timer;
1608
1609 SL_ENTER(_("sh_unix_resettimer"));
1610
1611 this_timer.it_value.tv_sec = 0;
1612 this_timer.it_value.tv_usec = 0;
1613
1614 this_timer.it_interval.tv_sec = 0;
1615 this_timer.it_interval.tv_usec = 0;
1616
1617 setitimer(ITIMER_REAL, &this_timer, NULL);
1618#if !defined(SH_PROFILE)
1619 setitimer(ITIMER_VIRTUAL, &this_timer, NULL);
1620 setitimer(ITIMER_PROF, &this_timer, NULL);
1621#endif
1622
1623 SL_RET0(_("sh_unix_resettimer"));
1624}
1625
1626static void sh_unix_resetsignals(void)
1627{
1628 int sig_num;
1629#ifdef NSIG
1630 int max_sig = NSIG;
1631#else
1632 int max_sig = 255;
1633#endif
1634 int test;
1635 int status;
1636 struct sigaction act;
1637#if !defined(SH_PROFILE)
1638 struct sigaction oldact;
1639#endif
1640
1641 sigset_t set_proc;
1642
1643 SL_ENTER(_("sh_unix_resetsignals"));
1644 /*
1645 * Reset the current signal mask (inherited from parent process).
1646 */
1647
1648 sigfillset(&set_proc);
1649
1650 do {
1651 errno = 0;
1652 test = SH_SETSIGMASK(SIG_UNBLOCK, &set_proc, NULL);
1653 } while (test < 0 && errno == EINTR);
1654
1655 /*
1656 * Reset signal handling.
1657 */
1658
1659 act.sa_handler = SIG_DFL; /* signal action */
1660 sigemptyset( &act.sa_mask ); /* set an empty mask */
1661 act.sa_flags = 0; /* init sa_flags */
1662
1663 for (sig_num = 1; sig_num <= max_sig; ++sig_num)
1664 {
1665#if !defined(SH_PROFILE)
1666 test = retry_sigaction(FIL__, __LINE__, sig_num, &act, &oldact);
1667#else
1668 test = 0;
1669#endif
1670 if ((test == -1) && (errno != EINVAL))
1671 {
1672 char errbuf[SH_ERRBUF_SIZE];
1673 status = errno;
1674 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_SIG,
1675 sh_error_message (status, errbuf, sizeof(errbuf)), sig_num);
1676 }
1677 }
1678
1679 SL_RET0(_("sh_unix_resetsignals"));
1680}
1681
1682/* Get the local hostname (FQDN)
1683 */
1684static char * sh_tolower (char * s)
1685{
1686 char * ret = s;
1687 if (s)
1688 {
1689 for (; *s; ++s)
1690 {
1691 *s = tolower((unsigned char) *s);
1692 }
1693 }
1694 return ret;
1695}
1696
1697
1698#include <sys/socket.h>
1699
1700/* Required for BSD
1701 */
1702#ifdef HAVE_NETINET_IN_H
1703#include <netinet/in.h>
1704#endif
1705
1706#include <arpa/inet.h>
1707
1708const char * sh_unix_h_name (struct hostent * host_entry)
1709{
1710 char ** p;
1711 if (strchr(host_entry->h_name, '.')) {
1712 return host_entry->h_name;
1713 } else {
1714 for (p = host_entry->h_aliases; *p; ++p) {
1715 if (strchr(*p, '.'))
1716 return *p;
1717 }
1718 }
1719 return host_entry->h_name;
1720}
1721
1722/* uname() on FreeBSD is broken, because the 'nodename' buf is too small
1723 * to hold a valid (leftmost) domain label.
1724 */
1725#if defined(HAVE_UNAME) && !defined(HOST_IS_FREEBSD)
1726#include <sys/utsname.h>
1727void sh_unix_localhost()
1728{
1729 struct utsname buf;
1730 int i;
1731 unsigned int ddot;
1732 int len;
1733 char * p;
1734 char hostname[256];
1735 char numeric[SH_IP_BUF];
1736 char * canonical;
1737
1738
1739 SL_ENTER(_("sh_unix_localhost"));
1740
1741 (void) uname (&buf);
1742 /* flawfinder: ignore */ /* ff bug, ff sees system() */
1743 sl_strlcpy (sh.host.system, buf.sysname, SH_MINIBUF);
1744 sl_strlcpy (sh.host.release, buf.release, SH_MINIBUF);
1745 sl_strlcpy (sh.host.machine, buf.machine, SH_MINIBUF);
1746
1747 /* Workaround for cases where nodename could be
1748 * a truncated FQDN.
1749 */
1750 if (strlen(buf.nodename) == (sizeof(buf.nodename)-1))
1751 {
1752 p = strchr(buf.nodename, '.');
1753 if (NULL != p) {
1754 *p = '\0';
1755 sl_strlcpy(hostname, buf.nodename, 256);
1756 } else {
1757#ifdef HAVE_GETHOSTNAME
1758 if (0 != gethostname(hostname, 256))
1759 {
1760 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1761 _("nodename returned by uname may be truncated"),
1762 _("sh_unix_localhost"));
1763 sl_strlcpy (hostname, buf.nodename, 256);
1764 }
1765 else
1766 {
1767 hostname[255] = '\0';
1768 }
1769#else
1770 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1771 _("nodename returned by uname may be truncated"),
1772 _("sh_unix_localhost"));
1773 sl_strlcpy(hostname, buf.nodename, 256);
1774#endif
1775 }
1776 }
1777 else
1778 {
1779 sl_strlcpy(hostname, buf.nodename, 256);
1780 }
1781
1782 canonical = sh_ipvx_canonical(hostname, numeric, sizeof(numeric));
1783
1784 if (canonical == NULL)
1785 {
1786 sl_strlcpy (sh.host.name, hostname, SH_PATHBUF);
1787 sh_tolower (sh.host.name);
1788 }
1789 else
1790 {
1791 sl_strlcpy (sh.host.name, canonical, SH_PATHBUF);
1792 SH_FREE(canonical);
1793 }
1794
1795 /* check whether it looks like a FQDN
1796 */
1797 len = sl_strlen(sh.host.name);
1798 ddot = 0;
1799 for (i = 0; i < len; ++i)
1800 if (sh.host.name[i] == '.') ++ddot;
1801
1802 if (ddot == 0)
1803 {
1804 dlog(1, FIL__, __LINE__,
1805 _("According to uname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN.\nRather, it resolves this to %s.\nFor more information, see the entry about self-resolving under\n'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1806 hostname, sh.host.name);
1807 sl_strlcpy (sh.host.name, numeric, SH_PATHBUF);
1808 SL_RET0(_("sh_unix_localhost"));
1809 }
1810
1811 if (sh_ipvx_is_numeric(sh.host.name))
1812 {
1813 dlog(1, FIL__, __LINE__,
1814 _("According to uname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN.\nRather, it resolves this to %s.\nFor more information, see the entry about self-resolving under\n'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1815 hostname, sh.host.name);
1816 }
1817
1818 SL_RET0(_("sh_unix_localhost"));
1819}
1820
1821#else
1822
1823/*
1824 * --FreeBSD code
1825 */
1826#if defined(HAVE_UNAME)
1827#include <sys/utsname.h>
1828#endif
1829void sh_unix_localhost()
1830{
1831#if defined(HAVE_UNAME)
1832 struct utsname buf;
1833#endif
1834 int i;
1835 int ddot;
1836 int len;
1837 char hostname[1024];
1838 char numeric[SH_IP_BUF];
1839 char * canonical;
1840
1841 SL_ENTER(_("sh_unix_localhost"));
1842
1843#if defined(HAVE_UNAME)
1844 (void) uname (&buf);
1845 /* flawfinder: ignore */ /* ff bug, ff sees system() */
1846 sl_strlcpy (sh.host.system, buf.sysname, SH_MINIBUF);
1847 sl_strlcpy (sh.host.release, buf.release, SH_MINIBUF);
1848 sl_strlcpy (sh.host.machine, buf.machine, SH_MINIBUF);
1849#endif
1850
1851 (void) gethostname (hostname, 1024);
1852 hostname[1023] = '\0';
1853
1854 canonical = sh_ipvx_canonical(hostname, numeric, sizeof(numeric));
1855
1856 if (canonical == NULL)
1857 {
1858 sl_strlcpy (sh.host.name, hostname, SH_PATHBUF);
1859 sh_tolower (sh.host.name);
1860 }
1861 else
1862 {
1863 sl_strlcpy (sh.host.name, canonical, SH_PATHBUF);
1864 SH_FREE(canonical);
1865 }
1866
1867 /* check whether it looks like a FQDN
1868 */
1869 len = sl_strlen(sh.host.name);
1870 ddot = 0;
1871 for (i = 0; i < len; ++i)
1872 if (sh.host.name[i] == '.') ++ddot;
1873 if (ddot == 0)
1874 {
1875 dlog(1, FIL__, __LINE__,
1876 _("According to uname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN.\nRather, it resolves this to %s.\nFor more information, see the entry about self-resolving under\n'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1877 hostname, sh.host.name);
1878 sl_strlcpy (sh.host.name, numeric, SH_PATHBUF);
1879 SL_RET0(_("sh_unix_localhost"));
1880 }
1881
1882 if (sh_ipvx_is_numeric(sh.host.name))
1883 {
1884 dlog(1, FIL__, __LINE__,
1885 _("According to uname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN.\nRather, it resolves this to %s.\nFor more information, see the entry about self-resolving under\n'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1886 hostname, sh.host.name);
1887 }
1888
1889 SL_RET0(_("sh_unix_localhost"));
1890}
1891#endif
1892
1893
1894void sh_unix_memlock()
1895{
1896 SL_ENTER(_("sh_unix_memlock"));
1897
1898 /* do this before dropping privileges
1899 */
1900#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
1901 if (skey->mlock_failed == S_FALSE)
1902 {
1903 if ( (-1) == sh_unix_mlock( FIL__, __LINE__,
1904 (char *) skey, sizeof (sh_key_t)) )
1905 {
1906 SH_MUTEX_LOCK_UNSAFE(mutex_skey);
1907 skey->mlock_failed = S_TRUE;
1908 SH_MUTEX_UNLOCK_UNSAFE(mutex_skey);
1909 }
1910 }
1911#else
1912 if (skey->mlock_failed == S_FALSE)
1913 {
1914 SH_MUTEX_LOCK_UNSAFE(mutex_skey);
1915 skey->mlock_failed = S_TRUE;
1916 SH_MUTEX_UNLOCK_UNSAFE(mutex_skey);
1917 }
1918#endif
1919
1920 SL_RET0(_("sh_unix_memlock"));
1921}
1922
1923#ifdef SH_WITH_SERVER
1924char * chroot_dir = NULL;
1925
1926int sh_unix_set_chroot(const char * str)
1927{
1928 size_t len;
1929 static int block = 0;
1930
1931 if (block == 1)
1932 return 0;
1933
1934 if (str && *str == '/')
1935 {
1936 len = strlen(str) + 1;
1937 chroot_dir = calloc(1,strlen(str) + 1); /* only once */
1938 if (!chroot_dir)
1939 {
1940 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1941 return 1;
1942 }
1943 sl_strlcpy(chroot_dir, str, len);
1944 block = 1;
1945 return 0;
1946 }
1947 return 1;
1948}
1949
1950int sh_unix_chroot(void)
1951{
1952 int status;
1953
1954 if (chroot_dir != NULL)
1955 {
1956 status = retry_aud_chdir(FIL__, __LINE__, chroot_dir);
1957 if ( (-1) == status )
1958 {
1959 char errbuf[SH_ERRBUF_SIZE];
1960 status = errno;
1961 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
1962 sh_error_message (status, errbuf, sizeof(errbuf)), chroot_dir);
1963 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1964 }
1965 /* flawfinder: ignore */
1966 return (chroot(chroot_dir));
1967 }
1968 return 0;
1969}
1970/* #ifdef SH_WITH_SERVER */
1971#else
1972int sh_unix_chroot(void) { return 0; }
1973#endif
1974
1975/* daemon mode
1976 */
1977static int block_setdeamon = 0;
1978
1979int sh_unix_setdeamon(const char * dummy)
1980{
1981 int res = 0;
1982
1983 SL_ENTER(_("sh_unix_setdeamon"));
1984
1985 if (block_setdeamon != 0)
1986 SL_RETURN((0),_("sh_unix_setdeamon"));
1987
1988 if (dummy == NULL)
1989 sh.flag.isdaemon = S_TRUE;
1990 else
1991 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
1992
1993 if (sh.flag.opts == S_TRUE)
1994 block_setdeamon = 1;
1995
1996 SL_RETURN(res, _("sh_unix_setdeamon"));
1997}
1998#if defined(HAVE_LIBPRELUDE)
1999#include "sh_prelude.h"
2000#endif
2001
2002int sh_unix_setnodeamon(const char * dummy)
2003{
2004 int res = 0;
2005
2006 SL_ENTER(_("sh_unix_setnodeamon"));
2007
2008 if (block_setdeamon != 0)
2009 SL_RETURN((0),_("sh_unix_setmodeamon"));
2010
2011 if (dummy == NULL)
2012 sh.flag.isdaemon = S_FALSE;
2013 else
2014 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
2015
2016 if (sh.flag.opts == S_TRUE)
2017 block_setdeamon = 1;
2018
2019 SL_RETURN(res, _("sh_unix_setnodeamon"));
2020}
2021
2022int sh_unix_init(int goDaemon)
2023{
2024 int status;
2025 uid_t uid;
2026 pid_t oldpid = getpid();
2027#if defined(SH_WITH_SERVER)
2028 extern int sh_socket_open_int (void);
2029#endif
2030 char errbuf[SH_ERRBUF_SIZE];
2031
2032 extern void sh_kill_sub();
2033
2034 SL_ENTER(_("sh_unix_init"));
2035
2036 /* fork twice, exit the parent process
2037 */
2038 if (goDaemon == 1) {
2039
2040 switch (aud_fork(FIL__, __LINE__)) {
2041 case 0: break; /* child process continues */
2042 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
2043 default: /* parent process exits */
2044 sh_kill_sub();
2045 aud__exit(FIL__, __LINE__, 0);
2046 }
2047
2048 /* Child processes do not inherit page locks across a fork.
2049 * Error in next fork would return in this (?) thread of execution.
2050 */
2051 sh_unix_memlock();
2052
2053 setsid(); /* should not fail */
2054 sh.pid = (UINT64) getpid();
2055
2056 switch (aud_fork(FIL__, __LINE__)) {
2057 case 0: break; /* child process continues */
2058 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
2059 default: /* parent process exits */
2060 sh_kill_sub();
2061 aud__exit(FIL__, __LINE__, 0);
2062 }
2063
2064 /* Child processes do not inherit page locks across a fork.
2065 */
2066 sh_unix_memlock();
2067 sh.pid = (UINT64) getpid();
2068
2069 } else {
2070 setsid(); /* should not fail */
2071 }
2072
2073 /* set working directory
2074 */
2075#ifdef SH_PROFILE
2076 status = 0;
2077#else
2078 status = retry_aud_chdir(FIL__, __LINE__, "/");
2079#endif
2080 if ( (-1) == status )
2081 {
2082 status = errno;
2083 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
2084 sh_error_message (status, errbuf, sizeof(errbuf)), "/");
2085 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2086 }
2087
2088 /* reset timers
2089 */
2090 sh_unix_resettimer();
2091
2092 /* signal handlers
2093 */
2094 sh_unix_resetsignals();
2095#if defined(SCREW_IT_UP)
2096 sh_sigtrap_prepare();
2097#endif
2098 sh_unix_siginstall (goDaemon);
2099
2100 /* set file creation mask
2101 */
2102 (void) umask (0); /* should not fail */
2103
2104 /* set resource limits to maximum, and
2105 * core dump size to zero
2106 */
2107 sh_unix_setlimits();
2108
2109 /* zero out the environment (like PATH='\0')
2110 */
2111 sh_unix_zeroenv();
2112
2113 if (goDaemon == 1)
2114 {
2115 /* Close first tree file descriptors
2116 */
2117 sl_close_fd (FIL__, __LINE__, 0); /* if running as daemon */
2118 sl_close_fd (FIL__, __LINE__, 1); /* if running as daemon */
2119 sl_close_fd (FIL__, __LINE__, 2); /* if running as daemon */
2120
2121 /* Enable full error logging
2122 */
2123 sh_error_only_stderr (S_FALSE);
2124
2125 /* open first three streams to /dev/null
2126 */
2127 status = aud_open(FIL__, __LINE__, SL_NOPRIV, _("/dev/null"), O_RDWR, 0);
2128 if (status < 0)
2129 {
2130 status = errno;
2131 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2132 sh_error_message(status, errbuf, sizeof(errbuf)), _("open"));
2133 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2134 }
2135
2136 status = retry_aud_dup(FIL__, __LINE__, 0);
2137 if (status >= 0)
2138 retry_aud_dup(FIL__, __LINE__, 0);
2139
2140 if (status < 0)
2141 {
2142 status = errno;
2143 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2144 sh_error_message(status, errbuf, sizeof(errbuf)), _("dup"));
2145 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2146 }
2147
2148 sh_error_enable_unsafe (S_TRUE);
2149#if defined(HAVE_LIBPRELUDE)
2150 sh_prelude_reset ();
2151#endif
2152
2153 /* --- wait until parent has exited ---
2154 */
2155 while (1 == 1)
2156 {
2157 errno = 0;
2158 if (0 > aud_kill (FIL__, __LINE__, oldpid, 0) && errno == ESRCH)
2159 {
2160 break;
2161 }
2162 retry_msleep(0, 1);
2163 }
2164
2165 /* write PID file
2166 */
2167 status = sh_unix_write_pid_file();
2168 if (status < 0)
2169 {
2170 sl_get_euid(&uid);
2171 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_PIDFILE,
2172 (long) uid, sh.srvlog.alt);
2173 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2174 }
2175#if defined(SH_WITH_SERVER)
2176 sh_socket_open_int ();
2177#endif
2178 }
2179 else
2180 {
2181 sh_error_enable_unsafe (S_TRUE);
2182#if defined(HAVE_LIBPRELUDE)
2183 sh_prelude_reset ();
2184#endif
2185#if defined(SH_WITH_SERVER)
2186 sh_socket_open_int ();
2187#endif
2188 }
2189
2190 /* chroot (this is a no-op if no chroot dir is specified
2191 */
2192 status = sh_unix_chroot();
2193 if (status < 0)
2194 {
2195 status = errno;
2196 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2197 sh_error_message(status, errbuf, sizeof(errbuf)), _("chroot"));
2198 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2199 }
2200
2201 /* drop capabilities
2202 */
2203 sl_drop_cap();
2204
2205 SL_RETURN((0),_("sh_unix_init"));
2206}
2207
2208/* --- run a command, securely --- */
2209
2210int sh_unix_run_command (const char * str)
2211{
2212 pid_t pid;
2213 char * arg[4];
2214 char * env[5];
2215 char * path = sh_util_strdup(_("/bin/sh"));
2216
2217 int status = -1;
2218
2219 arg[0] = sh_util_strdup(_("/bin/sh"));
2220 arg[1] = sh_util_strdup(_("-c"));
2221 arg[2] = sh_util_strdup(str);
2222 arg[3] = NULL;
2223
2224 env[0] = sh_util_strdup(_("PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/ucb"));
2225 env[1] = sh_util_strdup(_("SHELL=/bin/sh"));
2226 env[2] = sh_util_strdup(_("IFS= \t\n"));
2227 if (getenv("TZ")) { /* flawfinder: ignore */
2228 char * tz = sh_util_strdup(getenv("TZ")); /* flawfinder: ignore */
2229 size_t tzlen = strlen(tz);
2230 if (S_TRUE == sl_ok_adds (4, tzlen)) {
2231 env[3] = SH_ALLOC(4+tzlen);
2232 sl_strlcpy(env[3], "TZ=", 4);
2233 sl_strlcat(env[3], tz , 4+tzlen);
2234 } else {
2235 env[3] = NULL;
2236 }
2237 } else {
2238 env[3] = NULL;
2239 }
2240 env[4] = NULL;
2241
2242 pid = fork();
2243
2244 if (pid == (pid_t)(-1))
2245 {
2246 return -1;
2247 }
2248
2249 else if (pid == 0) /* child */
2250 {
2251 memset(skey, 0, sizeof(sh_key_t));
2252 (void) umask(S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
2253 sh_unix_closeall (3, -1, S_TRUE); /* in child process */
2254 execve(path, arg, env);
2255 _exit(EXIT_FAILURE);
2256 }
2257
2258 else /* parent */
2259 {
2260 int r;
2261
2262 while((r = waitpid(pid, &status, WUNTRACED)) != pid && r != -1) ;
2263
2264#if !defined(USE_UNO)
2265 if (r == -1 || !WIFEXITED(status))
2266 {
2267 status = -1;
2268 }
2269 else
2270 {
2271 status = WEXITSTATUS(status);
2272 }
2273#endif
2274 }
2275
2276 return status;
2277}
2278
2279/********************************************************
2280 *
2281 * TIME
2282 *
2283 ********************************************************/
2284
2285/* Figure out the time offset of the current timezone
2286 * in a portable way.
2287 */
2288char * t_zone(const time_t * xx)
2289{
2290 struct tm aa;
2291 struct tm bb;
2292
2293 struct tm * aptr;
2294 struct tm * bptr;
2295
2296 int sign = 0;
2297 int diff = 0;
2298 int hh, mm;
2299 static char tz[64];
2300
2301 SL_ENTER(_("t_zone"));
2302
2303#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2304 aptr = gmtime_r (xx, &aa);
2305#else
2306 aptr = gmtime(xx);
2307 if (aptr)
2308 memcpy (&aa, aptr, sizeof(struct tm));
2309#endif
2310
2311#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2312 bptr = localtime_r (xx, &bb);
2313#else
2314 bptr = localtime(xx);
2315 if (bptr)
2316 memcpy (&bb, bptr, sizeof(struct tm));
2317#endif
2318
2319 if (bptr && aptr)
2320 {
2321 /* Check for datum wrap-around.
2322 */
2323 if ((aa.tm_mday == 1) && (aa.tm_mday < bb.tm_mday) && (aa.tm_hour < bb.tm_hour))
2324 sign = ( 1);
2325 else if (aa.tm_year < bb.tm_year)
2326 sign = (-1);
2327 else if (aa.tm_mon < bb.tm_mon)
2328 sign = (-1);
2329 else if (aa.tm_mday < bb.tm_mday)
2330 sign = (-1);
2331 else if (bb.tm_year < aa.tm_year)
2332 sign = ( 1);
2333 else if (bb.tm_mon < aa.tm_mon)
2334 sign = ( 1);
2335 else if (bb.tm_mday < aa.tm_mday)
2336 sign = ( 1);
2337
2338 diff = aa.tm_hour * 60 + aa.tm_min;
2339 diff = (bb.tm_hour * 60 + bb.tm_min) - diff;
2340 diff = diff - (sign * 24 * 60); /* datum wrap-around correction */
2341 hh = diff / 60;
2342 mm = diff - (hh * 60);
2343 sprintf (tz, _("%+03d%02d"), hh, mm); /* known to fit */
2344 }
2345 else
2346 {
2347 sprintf (tz, _("%+03d%02d"), 0, 0);
2348 }
2349 SL_RETURN(tz, _("t_zone"));
2350}
2351
2352unsigned long sh_unix_longtime ()
2353{
2354 return ((unsigned long)time(NULL));
2355}
2356
2357#ifdef HAVE_GETTIMEOFDAY
2358unsigned long sh_unix_notime ()
2359{
2360 struct timeval tv;
2361
2362 gettimeofday (&tv, NULL);
2363
2364 return ((unsigned long)(tv.tv_sec + tv.tv_usec * 10835 + getpid() + getppid()));
2365
2366}
2367#endif
2368
2369static int count_dev_time = 0;
2370
2371void reset_count_dev_time(void)
2372{
2373 count_dev_time = 0;
2374 return;
2375}
2376
2377int sh_unix_settimeserver (const char * address)
2378{
2379
2380 SL_ENTER(_("sh_unix_settimeserver"));
2381
2382 if (address != NULL && count_dev_time < 2
2383 && sl_strlen(address) < SH_PATHBUF)
2384 {
2385 if (count_dev_time == 0)
2386 sl_strlcpy (sh.srvtime.name, address, SH_PATHBUF);
2387 else
2388 sl_strlcpy (sh.srvtime.alt, address, SH_PATHBUF);
2389
2390 ++count_dev_time;
2391 SL_RETURN((0), _("sh_unix_settimeserver"));
2392 }
2393 SL_RETURN((-1), _("sh_unix_settimeserver"));
2394}
2395
2396
2397#ifdef HAVE_NTIME
2398#define UNIXEPOCH 2208988800UL /* difference between Unix time and net time
2399 * The UNIX EPOCH starts in 1970.
2400 */
2401#include <sys/socket.h>
2402#include <netinet/in.h>
2403#include <arpa/inet.h>
2404#include <netdb.h>
2405#include <ctype.h>
2406#endif
2407
2408/* Timeserver service. */
2409/* define is missing on HP-UX 10.20 */
2410#ifndef IPPORT_TIMESERVER
2411#define IPPORT_TIMESERVER 37
2412#endif
2413
2414char * sh_unix_time (time_t thetime, char * buffer, size_t len)
2415{
2416
2417 int status;
2418 char AsciiTime[81]; /* local time */
2419 time_t time_now;
2420 struct tm * time_ptr;
2421#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2422 struct tm time_tm;
2423#endif
2424#ifdef SH_USE_XML
2425 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2426#else
2427 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2428#endif
2429
2430#ifdef HAVE_NTIME
2431 int fd; /* network file descriptor */
2432 u_char net_time[4]; /* remote time in network format */
2433 static int failerr = 0; /* no net time */
2434 int fail = 0; /* no net time */
2435 int errflag;
2436 char errmsg[256];
2437 char error_call[SH_MINIBUF];
2438 int error_num;
2439#endif
2440
2441 SL_ENTER(_("sh_unix_time"));
2442
2443#ifdef HAVE_NTIME
2444 if (thetime == 0)
2445 {
2446 if (sh.srvtime.name[0] == '\0')
2447 {
2448 fail = 1;
2449 (void) time (&time_now);
2450 }
2451 else /* have a timeserver address */
2452 {
2453 /* don't call timeserver more than once per second */
2454 static time_t time_old = 0;
2455 time_t time_new;
2456 static time_t time_saved = 0;
2457 (void) time (&time_new);
2458 if ((time_new == time_old) && (time_saved != 0))
2459 {
2460 time_now = time_saved;
2461 goto end;
2462 }
2463 time_old = time_new;
2464
2465
2466 fd = connect_port_2 (sh.srvtime.name, sh.srvtime.alt,
2467 IPPORT_TIMESERVER,
2468 error_call, &error_num, errmsg, sizeof(errmsg));
2469 if (fd >= 0)
2470 {
2471 if (4 != read_port (fd, (char *) net_time, 4, &errflag, 2))
2472 {
2473 fail = 1;
2474 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2475 MSG_E_NLOST,
2476 _("time"), sh.srvtime.name);
2477 }
2478 sl_close_fd(FIL__, __LINE__, fd);
2479 }
2480 else
2481 {
2482 sh_error_handle ((-1), FIL__, __LINE__, error_num,
2483 MSG_E_NET, errmsg, error_call,
2484 _("time"), sh.srvtime.name);
2485 fail = 1;
2486 }
2487
2488 if (fail == 0)
2489 {
2490 unsigned long ltmp;
2491 UINT32 ttmp;
2492 memcpy(&ttmp, net_time, sizeof(UINT32)); ltmp = ttmp;
2493 time_now = ntohl(ltmp) - UNIXEPOCH;
2494 time_saved = time_now;
2495
2496 if (failerr == 1) {
2497 failerr = 0;
2498 sh_error_handle ((-1), FIL__, __LINE__, 0,
2499 MSG_E_NEST,
2500 _("time"), sh.srvtime.name);
2501 }
2502 }
2503 else
2504 {
2505 (void) time (&time_now);
2506 time_saved = 0;
2507
2508 if (failerr == 0)
2509 {
2510 failerr = 1;
2511 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2512 MSG_SRV_FAIL,
2513 _("time"), sh.srvtime.name);
2514 }
2515 }
2516 end:
2517 ; /* 'label at end of compound statement' */
2518 }
2519 }
2520 else
2521 {
2522 time_now = thetime;
2523 }
2524
2525 /* #ifdef HAVE_NTIME */
2526#else
2527
2528 if (thetime == 0)
2529 {
2530 (void) time (&time_now);
2531 }
2532 else
2533 {
2534 time_now = thetime;
2535 }
2536
2537 /* #ifdef HAVE_NTIME */
2538#endif
2539
2540 if (time_now == (-1) )
2541 {
2542 sl_strlcpy(buffer, _(deftime), len);
2543 SL_RETURN(buffer, _("sh_unix_time"));
2544 }
2545 else
2546 {
2547#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2548 time_ptr = localtime_r (&time_now, &time_tm);
2549#else
2550 time_ptr = localtime (&time_now);
2551#endif
2552 }
2553 if (time_ptr != NULL)
2554 {
2555 status = strftime (AsciiTime, sizeof(AsciiTime),
2556#ifdef SH_USE_XML
2557 _("%Y-%m-%dT%H:%M:%S%%s"),
2558#else
2559 _("[%Y-%m-%dT%H:%M:%S%%s]"),
2560#endif
2561 time_ptr);
2562
2563 sl_snprintf(buffer, len, AsciiTime, t_zone(&time_now));
2564
2565 if ( (status == 0) || (status == sizeof(AsciiTime)) )
2566 {
2567 sl_strlcpy(buffer, _(deftime), len);
2568 SL_RETURN( buffer, _("sh_unix_time"));
2569 }
2570 else
2571 {
2572 SL_RETURN(buffer, _("sh_unix_time"));
2573 }
2574 }
2575
2576 /* last resort
2577 */
2578 sl_strlcpy(buffer, _(deftime), len);
2579 SL_RETURN( buffer, _("sh_unix_time"));
2580}
2581
2582static int sh_unix_use_localtime = S_FALSE;
2583
2584/* whether to use localtime for file timestamps in logs
2585 */
2586int sh_unix_uselocaltime (const char * c)
2587{
2588 int i;
2589 SL_ENTER(_("sh_unix_uselocaltime"));
2590 i = sh_util_flagval(c, &(sh_unix_use_localtime));
2591
2592 SL_RETURN(i, _("sh_unix_uselocaltime"));
2593}
2594
2595char * sh_unix_gmttime (time_t thetime, char * buffer, size_t len)
2596{
2597
2598 int status;
2599
2600 struct tm * time_ptr;
2601#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS)
2602 struct tm time_tm;
2603#endif
2604 char AsciiTime[81]; /* GMT time */
2605#ifdef SH_USE_XML
2606 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2607#else
2608 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2609#endif
2610
2611 SL_ENTER(_("sh_unix_gmttime"));
2612
2613 if (sh_unix_use_localtime == S_FALSE)
2614 {
2615#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2616 time_ptr = gmtime_r (&thetime, &time_tm);
2617#else
2618 time_ptr = gmtime (&thetime);
2619#endif
2620 }
2621 else
2622 {
2623#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2624 time_ptr = localtime_r (&thetime, &time_tm);
2625#else
2626 time_ptr = localtime (&thetime);
2627#endif
2628 }
2629 if (time_ptr != NULL)
2630 {
2631 status = strftime (AsciiTime, 80,
2632#ifdef SH_USE_XML
2633 _("%Y-%m-%dT%H:%M:%S"),
2634#else
2635 _("[%Y-%m-%dT%H:%M:%S]"),
2636#endif
2637 time_ptr);
2638
2639 if ( (status == 0) || (status == 80) )
2640 sl_strlcpy(buffer, _(deftime), len);
2641 else
2642 sl_strlcpy(buffer, AsciiTime, len);
2643 SL_RETURN( buffer, _("sh_unix_gmttime"));
2644 }
2645
2646 /* last resort
2647 */
2648 sl_strlcpy(buffer, _(deftime), len);
2649 SL_RETURN( buffer, _("sh_unix_gmttime"));
2650}
2651
2652
2653char * sh_unix_getUIDdir (int level, uid_t uid, char * out, size_t len)
2654{
2655 struct passwd * tempres;
2656 int status = 0;
2657
2658#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2659 struct passwd pwd;
2660 char * buffer;
2661#endif
2662 char errbuf[SH_ERRBUF_SIZE];
2663
2664 SL_ENTER(_("sh_unix_getUIDdir"));
2665
2666#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2667 buffer = SH_ALLOC(SH_PWBUF_SIZE);
2668 sh_getpwuid_r(uid, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
2669#else
2670 errno = 0;
2671 tempres = sh_getpwuid(uid);
2672 status = errno;
2673#endif
2674
2675 if (tempres == NULL) {
2676 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2677 sh_error_message(status, errbuf, sizeof(errbuf)),
2678 _("getpwuid"), (long) uid, _("completely missing"));
2679#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2680 SH_FREE(buffer);
2681#endif
2682 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2683 }
2684
2685 if (tempres->pw_dir != NULL) {
2686 sl_strlcpy(out, tempres->pw_dir, len);
2687#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2688 SH_FREE(buffer);
2689#endif
2690 SL_RETURN( out, _("sh_unix_getUIDdir"));
2691 } else {
2692 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2693 sh_error_message(status, errbuf, sizeof(errbuf)),
2694 _("getpwuid"), (long) uid, _("pw_dir"));
2695#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2696 SH_FREE(buffer);
2697#endif
2698 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2699 }
2700}
2701
2702/* ------------------- Caching ----------------*/
2703#include "zAVLTree.h"
2704
2705#define CACHE_GID 0
2706#define CACHE_UID 1
2707
2708struct user_id {
2709 char * name;
2710 uid_t id;
2711 struct user_id * next;
2712};
2713
2714static struct user_id * uid_list = NULL;
2715static struct user_id * gid_list = NULL;
2716
2717SH_MUTEX_STATIC(mutex_cache, PTHREAD_MUTEX_INITIALIZER);
2718
2719static void sh_userid_free(struct user_id * item)
2720{
2721 while (item)
2722 {
2723 struct user_id * user = item;
2724 item = item->next;
2725
2726 SH_FREE(user->name);
2727 SH_FREE(user);
2728 }
2729 return;
2730}
2731
2732void sh_userid_destroy ()
2733{
2734 struct user_id * tmp_uid;
2735 struct user_id * tmp_gid;
2736
2737 SH_MUTEX_LOCK_UNSAFE(mutex_cache);
2738 tmp_gid = gid_list;
2739 gid_list = NULL;
2740 tmp_uid = uid_list;
2741 uid_list = NULL;
2742 SH_MUTEX_UNLOCK_UNSAFE(mutex_cache);
2743
2744 sh_userid_free(tmp_uid);
2745 sh_userid_free(tmp_gid);
2746 return;
2747}
2748
2749static void sh_userid_additem(struct user_id * list, struct user_id * item)
2750{
2751 if (list)
2752 {
2753 while (list && list->next)
2754 list = list->next;
2755 list->next = item;
2756 }
2757 return;
2758}
2759
2760static void sh_userid_add(uid_t id, char * username, int which)
2761{
2762 size_t len;
2763 struct user_id * user = SH_ALLOC(sizeof(struct user_id));
2764
2765 if (username)
2766 len = strlen(username) + 1;
2767 else
2768 len = 1;
2769
2770 user->name = SH_ALLOC(len);
2771 user->id = id;
2772 if (username)
2773 sl_strlcpy(user->name, username, len);
2774 else
2775 user->name[0] = '\0';
2776 user->next = NULL;
2777
2778 SH_MUTEX_LOCK(mutex_cache);
2779 if (which == CACHE_UID)
2780 {
2781 if (!uid_list)
2782 uid_list = user;
2783 else
2784 sh_userid_additem(uid_list, user);
2785 }
2786 else
2787 {
2788 if (!gid_list)
2789 gid_list = user;
2790 else
2791 sh_userid_additem(gid_list, user);
2792 }
2793 SH_MUTEX_UNLOCK(mutex_cache);
2794
2795 return;
2796}
2797
2798static char * sh_userid_search(struct user_id * list, uid_t id)
2799{
2800 while (list)
2801 {
2802 if (list->id == id)
2803 return list->name;
2804 list = list->next;
2805 }
2806 return NULL;
2807}
2808
2809static char * sh_userid_get (uid_t id, int which, char * out, size_t len)
2810{
2811 char * user = NULL;
2812
2813 SH_MUTEX_LOCK_UNSAFE(mutex_cache);
2814 if (which == CACHE_UID)
2815 user = sh_userid_search(uid_list, id);
2816 else
2817 user = sh_userid_search(gid_list, id);
2818 if (user)
2819 {
2820 sl_strlcpy(out, user, len);
2821 user = out;
2822 }
2823 SH_MUTEX_UNLOCK_UNSAFE(mutex_cache);
2824
2825 return user;
2826}
2827
2828/* --------- end caching code --------- */
2829
2830#include "sh_subuid.h"
2831
2832char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len)
2833{
2834 struct passwd * tempres;
2835#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2836 struct passwd pwd;
2837 char * buffer;
2838#endif
2839 int status = 0;
2840 char errbuf[SH_ERRBUF_SIZE];
2841 char * tmp;
2842
2843 SL_ENTER(_("sh_unix_getUIDname"));
2844
2845 tmp = sh_userid_get(uid, CACHE_UID, out, len);
2846
2847 if (tmp)
2848 {
2849 if (tmp[0] != '\0')
2850 {
2851 SL_RETURN( out, _("sh_unix_getUIDname"));
2852 }
2853 else
2854 {
2855 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2856 }
2857 }
2858
2859#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2860 buffer = SH_ALLOC(SH_PWBUF_SIZE);
2861 sh_getpwuid_r(uid, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
2862#else
2863 errno = 0;
2864 tempres = sh_getpwuid(uid);
2865 status = errno;
2866#endif
2867
2868 /* case 1: we have it
2869 */
2870 if (tempres && tempres->pw_name != NULL)
2871 {
2872
2873 sl_strlcpy(out, tempres->pw_name, len);
2874 sh_userid_add(uid, out, CACHE_UID);
2875
2876#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2877 SH_FREE(buffer);
2878#endif
2879
2880 SL_RETURN( out, _("sh_unix_getUIDname"));
2881 }
2882
2883#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2884 SH_FREE(buffer);
2885#endif
2886
2887 if (tempres == NULL)
2888 {
2889 char * pwname = sh_get_subuid ((unsigned long) uid);
2890
2891 if (pwname)
2892 {
2893 sl_strlcpy(out, pwname, len);
2894 sh_userid_add(uid, out, CACHE_UID);
2895 SL_RETURN( out, _("sh_unix_getUIDname"));
2896 }
2897
2898 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2899 sh_error_message(status, errbuf, sizeof(errbuf)),
2900 _("getpwuid"), (long) uid, _("completely missing"));
2901 sh_userid_add(uid, NULL, CACHE_UID);
2902 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2903 }
2904
2905
2906 /* getwpuid returns struct, but no pw_name
2907 */
2908 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2909 sh_error_message(status, errbuf, sizeof(errbuf)),
2910 _("getpwuid"), (long) uid, _("pw_user"));
2911 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2912}
2913
2914char * sh_unix_getGIDname (int level, gid_t gid, char * out, size_t len)
2915{
2916 struct group * tempres;
2917 int status = 0;
2918
2919#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2920 struct group grp;
2921 char * buffer;
2922#endif
2923 char errbuf[SH_ERRBUF_SIZE];
2924 char * tmp;
2925
2926 SL_ENTER(_("sh_unix_getGIDname"));
2927
2928 tmp = sh_userid_get((uid_t)gid, CACHE_GID, out, len);
2929
2930 if (tmp)
2931 {
2932 if (tmp[0] != '\0')
2933 {
2934 SL_RETURN( out, _("sh_unix_getGIDname"));
2935 }
2936 else
2937 {
2938 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2939 }
2940 }
2941
2942#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2943 buffer = SH_ALLOC(SH_GRBUF_SIZE);
2944 status = sh_getgrgid_r(gid, &grp, buffer, SH_GRBUF_SIZE, &tempres);
2945#else
2946 errno = 0;
2947 tempres = sh_getgrgid(gid);
2948 status = errno;
2949#endif
2950
2951 if (status == ERANGE)
2952 {
2953 static int seen = 0;
2954
2955 if (seen == 0)
2956 {
2957 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2958 sh_error_message(status, errbuf, sizeof(errbuf)),
2959 _("getgrgid"), (long) gid, _("line too long in group entry"));
2960 ++seen;
2961 }
2962
2963#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2964 SH_FREE(buffer);
2965#endif
2966
2967 sh_userid_add(gid, NULL, CACHE_GID);
2968 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2969 }
2970
2971 if (tempres && tempres->gr_name != NULL)
2972 {
2973
2974 sl_strlcpy(out, tempres->gr_name, len);
2975 sh_userid_add((uid_t)gid, out, CACHE_GID);
2976
2977#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2978 SH_FREE(buffer);
2979#endif
2980
2981 SL_RETURN( out, _("sh_unix_getGIDname"));
2982 }
2983
2984#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2985 SH_FREE(buffer);
2986#endif
2987
2988 if (tempres == NULL)
2989 {
2990 char * grname = sh_get_subgid ((unsigned long) gid);
2991
2992 if (grname)
2993 {
2994 sl_strlcpy(out, grname, len);
2995 sh_userid_add((uid_t)gid, out, CACHE_GID);
2996 SL_RETURN( out, _("sh_unix_getGIDname"));
2997 }
2998
2999 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
3000 sh_error_message(status, errbuf, sizeof(errbuf)),
3001 _("getgrgid"), (long) gid, _("completely missing"));
3002 sh_userid_add(gid, NULL, CACHE_GID);
3003 SL_RETURN( NULL, _("sh_unix_getGIDname"));
3004 }
3005
3006 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
3007 sh_error_message(status, errbuf, sizeof(errbuf)),
3008 _("getgrgid"), (long) gid, _("gr_name"));
3009 SL_RETURN( NULL, _("sh_unix_getGIDname"));
3010}
3011
3012int sh_unix_getUser ()
3013{
3014 char * p;
3015 uid_t seuid, sruid;
3016 char user[USER_MAX];
3017 char dir[SH_PATHBUF];
3018
3019 SL_ENTER(_("sh_unix_getUser"));
3020
3021 seuid = geteuid();
3022
3023 sh.effective.uid = seuid;
3024
3025 p = sh_unix_getUIDdir (SH_ERR_ERR, seuid, dir, sizeof(dir));
3026
3027 if (p == NULL)
3028 SL_RETURN((-1), _("sh_unix_getUser"));
3029 else
3030 {
3031 if (sl_strlen(p) >= SH_PATHBUF) {
3032 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
3033 _("getpwuid"), (long) seuid, _("pw_home"));
3034 SL_RETURN((-1), _("sh_unix_getUser"));
3035 } else {
3036 sl_strlcpy ( sh.effective.home, p, SH_PATHBUF);
3037 }
3038 }
3039
3040 sruid = getuid();
3041
3042 sh.real.uid = sruid;
3043
3044 p = sh_unix_getUIDname (SH_ERR_ERR, sruid, user, sizeof(user));
3045 if (p == NULL)
3046 SL_RETURN((-1), _("sh_unix_getUser"));
3047 else
3048 {
3049 if (sl_strlen(p) >= USER_MAX) {
3050 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
3051 _("getpwuid"), (long) sruid, _("pw_user"));
3052 SL_RETURN((-1), _("sh_unix_getUser"));
3053 } else {
3054 sl_strlcpy ( sh.real.user, p, USER_MAX);
3055 }
3056 }
3057
3058 p = sh_unix_getUIDdir (SH_ERR_ERR, sruid, dir, sizeof(dir));
3059
3060 if (p == NULL)
3061 SL_RETURN((-1), _("sh_unix_getUser"));
3062 else
3063 {
3064 if (sl_strlen(p) >= SH_PATHBUF) {
3065 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
3066 _("getpwuid"), (long) sruid, _("pw_home"));
3067 SL_RETURN((-1), _("sh_unix_getUser"));
3068 } else {
3069 sl_strlcpy ( sh.real.home, p, SH_PATHBUF);
3070 }
3071 }
3072
3073 SL_RETURN((0), _("sh_unix_getUser"));
3074
3075 /* notreached */
3076}
3077
3078/* return >0 on success, -1 on EOF */
3079int sh_unix_getline (SL_TICKET fd, char * line, int sizeofline)
3080{
3081 register int count;
3082 register int n = 0;
3083 char c;
3084
3085 SL_ENTER(_("sh_unix_getline"));
3086
3087 if (sizeofline < 2) {
3088 line[0] = '\0';
3089 SL_RETURN((0), _("sh_unix_getline"));
3090 }
3091
3092 --sizeofline;
3093
3094 while (n < sizeofline) {
3095
3096 count = sl_read (fd, &c, 1);
3097
3098 /* end of file
3099 */
3100 if (count < 1) {
3101 line[n] = '\0';
3102 n = -1;
3103 break;
3104 }
3105
3106 if (/* c != '\0' && */ c != '\n') {
3107 line[n] = c;
3108 ++n;
3109 } else if (c == '\n') {
3110 if (n > 0) {
3111 line[n] = '\0';
3112 break;
3113 } else {
3114 line[n] = '\n'; /* get newline only if only char on line */
3115 ++n;
3116 line[n] = '\0';
3117 break;
3118 }
3119 } else {
3120 line[n] = '\0';
3121 break;
3122 }
3123
3124 }
3125
3126
3127 line[sizeofline] = '\0'; /* make sure line is terminated */
3128 SL_RETURN((n), _("sh_unix_getline"));
3129}
3130
3131
3132#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
3133
3134/**************************************************************
3135 *
3136 * --- FILE INFO ---
3137 *
3138 **************************************************************/
3139
3140#if (defined(__linux__) && (defined(HAVE_LINUX_EXT2_FS_H) || defined(HAVE_EXT2FS_EXT2_FS_H))) || defined(HAVE_STAT_FLAGS)
3141
3142#if defined(__linux__)
3143
3144/* --- Determine ext2fs file attributes. ---
3145 */
3146#include <sys/ioctl.h>
3147#if defined(HAVE_EXT2FS_EXT2_FS_H)
3148#include <ext2fs/ext2_fs.h>
3149#else
3150#include <linux/ext2_fs.h>
3151#endif
3152
3153/* __linux__ includes */
3154#endif
3155
3156static
3157int sh_unix_getinfo_attr (char * name,
3158 unsigned long * flags,
3159 char * c_attr,
3160 int fd, struct stat * buf)
3161{
3162
3163/* TAKEN FROM:
3164 *
3165 * lsattr.c - List file attributes on an ext2 file system
3166 *
3167 * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
3168 * Laboratoire MASI, Institut Blaise Pascal
3169 * Universite Pierre et Marie Curie (Paris VI)
3170 *
3171 * This file can be redistributed under the terms of the GNU General
3172 * Public License
3173 */
3174
3175#ifdef HAVE_STAT_FLAGS
3176
3177 SL_ENTER(_("sh_unix_getinfo_attr"));
3178
3179 *flags = 0;
3180
3181 /* cast to void to avoid compiler warning about unused parameters */
3182 (void) fd;
3183 (void) name;
3184
3185#ifdef UF_NODUMP
3186 if (buf->st_flags & UF_NODUMP) {
3187 *flags |= UF_NODUMP;
3188 c_attr[0] = 'd';
3189 }
3190#endif
3191#ifdef UF_IMMUTABLE
3192 if (buf->st_flags & UF_IMMUTABLE) {
3193 *flags |= UF_IMMUTABLE;
3194 c_attr[1] = 'i';
3195 }
3196#endif
3197#ifdef UF_APPEND
3198 if (buf->st_flags & UF_APPEND) {
3199 *flags |= UF_APPEND;
3200 c_attr[2] = 'a';
3201 }
3202#endif
3203#ifdef UF_NOUNLINK
3204 if (buf->st_flags & UF_NOUNLINK) {
3205 *flags |= UF_NOUNLINK;
3206 c_attr[3] = 'u';
3207 }
3208#endif
3209#ifdef UF_OPAQUE
3210 if (buf->st_flags & UF_OPAQUE) {
3211 *flags |= UF_OPAQUE;
3212 c_attr[4] = 'o';
3213 }
3214#endif
3215#ifdef SF_ARCHIVED
3216 if (buf->st_flags & SF_ARCHIVED) {
3217 *flags |= SF_ARCHIVED;
3218 c_attr[5] = 'R';
3219 }
3220
3221#endif
3222#ifdef SF_IMMUTABLE
3223 if (buf->st_flags & SF_IMMUTABLE) {
3224 *flags |= SF_IMMUTABLE;
3225 c_attr[6] = 'I';
3226 }
3227#endif
3228#ifdef SF_APPEND
3229 if (buf->st_flags & SF_APPEND) {
3230 *flags |= SF_APPEND;
3231 c_attr[7] = 'A';
3232 }
3233#endif
3234#ifdef SF_NOUNLINK
3235 if (buf->st_flags & SF_NOUNLINK) {
3236 *flags |= SF_NOUNLINK;
3237 c_attr[8] = 'U';
3238 }
3239#endif
3240
3241 /* ! HAVE_STAT_FLAGS */
3242#else
3243
3244#ifdef HAVE_EXT2_IOCTLS
3245 int /* fd, */ r, f;
3246
3247 SL_ENTER(_("sh_unix_getinfo_attr"));
3248
3249 *flags = 0;
3250 (void) buf;
3251
3252 /* open() -> aud_open() R.Wichmann
3253 fd = aud_open (FIL__, __LINE__, SL_YESPRIV, name, O_RDONLY|O_NONBLOCK, 0);
3254 */
3255
3256 if (fd == -1 || name == NULL)
3257 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
3258
3259
3260 r = ioctl (fd, EXT2_IOC_GETFLAGS, &f);
3261 /* sl_close_fd (FIL__, __LINE__, fd); */
3262
3263 if (r == -1)
3264 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
3265
3266 if (f == 0)
3267 SL_RETURN(0, _("sh_unix_getinfo_attr"));
3268
3269 *flags = f;
3270
3271/* ! HAVE_EXT2_IOCTLS */
3272#else
3273
3274 SL_ENTER(_("sh_unix_getinfo_attr"));
3275
3276 *flags = 0; /* modified by R.Wichmann */
3277
3278/* ! HAVE_EXT2_IOCTLS */
3279#endif
3280/*
3281 * END
3282 *
3283 * lsattr.c - List file attributes on an ext2 file system
3284 */
3285
3286 if (*flags == 0)
3287 goto theend;
3288
3289#ifdef EXT2_SECRM_FL
3290 if ( (*flags & EXT2_SECRM_FL) != 0 ) c_attr[0] = 's';
3291#endif
3292#ifdef EXT2_UNRM_FL
3293 if ( (*flags & EXT2_UNRM_FL) != 0 ) c_attr[1] = 'u';
3294#endif
3295#ifdef EXT2_SYNC_FL
3296 if ( (*flags & EXT2_SYNC_FL) != 0 ) c_attr[2] = 'S';
3297#endif
3298#ifdef EXT2_IMMUTABLE_FL
3299 if ( (*flags & EXT2_IMMUTABLE_FL) != 0) c_attr[3] = 'i';
3300#endif
3301#ifdef EXT2_APPEND_FL
3302 if ( (*flags & EXT2_APPEND_FL) != 0 ) c_attr[4] = 'a';
3303#endif
3304#ifdef EXT2_NODUMP_FL
3305 if ( (*flags & EXT2_NODUMP_FL) != 0 ) c_attr[5] = 'd';
3306#endif
3307#ifdef EXT2_NOATIME_FL
3308 if ( (*flags & EXT2_NOATIME_FL) != 0) c_attr[6] = 'A';
3309#endif
3310#ifdef EXT2_COMPR_FL
3311 if ( (*flags & EXT2_COMPR_FL) != 0 ) c_attr[7] = 'c';
3312#endif
3313
3314#ifdef EXT2_TOPDIR_FL
3315 if ( (*flags & EXT2_TOPDIR_FL) != 0 ) c_attr[8] = 'T';
3316#endif
3317#ifdef EXT2_DIRSYNC_FL
3318 if ( (*flags & EXT2_DIRSYNC_FL) != 0 ) c_attr[9] = 'D';
3319#endif
3320#ifdef EXT2_NOTAIL_FL
3321 if ( (*flags & EXT2_NOTAIL_FL) != 0 ) c_attr[10] = 't';
3322#endif
3323#ifdef EXT2_JOURNAL_DATA_FL
3324 if ( (*flags & EXT2_JOURNAL_DATA_FL) != 0) c_attr[11] = 'j';
3325#endif
3326
3327 theend:
3328 /* ext2 */
3329#endif
3330
3331 c_attr[12] = '\0';
3332
3333 SL_RETURN(0, _("sh_unix_getinfo_attr"));
3334}
3335
3336/* defined(__linux__) || defined(HAVE_STAT_FLAGS) */
3337#endif
3338
3339/* determine file type
3340 */
3341static
3342int sh_unix_getinfo_type (struct stat * buf,
3343 ShFileType * type,
3344 char * c_mode)
3345{
3346 SL_ENTER(_("sh_unix_getinfo_type"));
3347
3348 if ( S_ISREG(buf->st_mode) ) {
3349 (*type) = SH_FILE_REGULAR;
3350 c_mode[0] = '-';
3351 }
3352 else if ( S_ISLNK(buf->st_mode) ) {
3353 (*type) = SH_FILE_SYMLINK;
3354 c_mode[0] = 'l';
3355 }
3356 else if ( S_ISDIR(buf->st_mode) ) {
3357 (*type) = SH_FILE_DIRECTORY;
3358 c_mode[0] = 'd';
3359 }
3360 else if ( S_ISCHR(buf->st_mode) ) {
3361 (*type) = SH_FILE_CDEV;
3362 c_mode[0] = 'c';
3363 }
3364 else if ( S_ISBLK(buf->st_mode) ) {
3365 (*type) = SH_FILE_BDEV;
3366 c_mode[0] = 'b';
3367 }
3368 else if ( S_ISFIFO(buf->st_mode) ) {
3369 (*type) = SH_FILE_FIFO;
3370 c_mode[0] = '|';
3371 }
3372 else if ( S_ISSOCK(buf->st_mode) ) {
3373 (*type) = SH_FILE_SOCKET;
3374 c_mode[0] = 's';
3375 }
3376 else if ( S_ISDOOR(buf->st_mode) ) {
3377 (*type) = SH_FILE_DOOR;
3378 c_mode[0] = 'D';
3379 }
3380 else if ( S_ISPORT(buf->st_mode) ) {
3381 (*type) = SH_FILE_PORT;
3382 c_mode[0] = 'P';
3383 }
3384 else {
3385 (*type) = SH_FILE_UNKNOWN;
3386 c_mode[0] = '?';
3387 }
3388
3389 SL_RETURN(0, _("sh_unix_getinfo_type"));
3390}
3391
3392int sh_unix_get_ftype(char * fullpath)
3393{
3394 char c_mode[CMODE_SIZE];
3395 struct stat buf;
3396 ShFileType type;
3397 int res;
3398
3399 SL_ENTER(_("sh_unix_get_ftype"));
3400
3401 res = retry_lstat(FIL__, __LINE__, fullpath, &buf);
3402
3403 if (res < 0)
3404 SL_RETURN(SH_FILE_UNKNOWN, _("sh_unix_getinfo_type"));
3405
3406 sh_unix_getinfo_type (&buf, &type, c_mode);
3407
3408 SL_RETURN(type, _("sh_unix_get_ftype"));
3409}
3410
3411
3412static
3413int sh_unix_getinfo_mode (struct stat *buf,
3414 unsigned int * mode,
3415 char * c_mode)
3416{
3417
3418 SL_ENTER(_("sh_unix_getinfo_mode"));
3419
3420 (*mode) = buf->st_mode;
3421
3422 /* make 'ls'-like string */
3423
3424 if ( (buf->st_mode & S_IRUSR) != 0 ) c_mode[1] = 'r';
3425 if ( (buf->st_mode & S_IWUSR) != 0 ) c_mode[2] = 'w';
3426 if ( (buf->st_mode & S_IXUSR) != 0 ) {
3427 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 's';
3428 else c_mode[3] = 'x';
3429 } else {
3430 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 'S';
3431 }
3432
3433 if ( (buf->st_mode & S_IRGRP) != 0 ) c_mode[4] = 'r';
3434 if ( (buf->st_mode & S_IWGRP) != 0 ) c_mode[5] = 'w';
3435 if ( (buf->st_mode & S_IXGRP) != 0 ) {
3436 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 's';
3437 else c_mode[6] = 'x';
3438 } else {
3439 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 'S';
3440 }
3441
3442 if ( (buf->st_mode & S_IROTH) != 0 ) c_mode[7] = 'r';
3443 if ( (buf->st_mode & S_IWOTH) != 0 ) c_mode[8] = 'w';
3444#ifdef S_ISVTX /* not POSIX */
3445 if ( (buf->st_mode & S_IXOTH) != 0 ) {
3446 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 't';
3447 else c_mode[9] = 'x';
3448 } else {
3449 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 'T';
3450 }
3451#else
3452 if ( (buf->st_mode & S_IXOTH) != 0 ) c_mode[9] = 'x';
3453#endif
3454
3455 SL_RETURN(0, _("sh_unix_getinfo_mode"));
3456}
3457
3458
3459long IO_Limit = 0;
3460
3461void sh_unix_io_pause ()
3462{
3463 long runtime;
3464 float someval;
3465 unsigned long sometime;
3466
3467 if (IO_Limit == 0)
3468 {
3469 return;
3470 }
3471 else
3472 {
3473 runtime = (long) (time(NULL) - sh.statistics.time_start);
3474
3475 if (runtime > 0 && (long)(sh.statistics.bytes_hashed/runtime) > IO_Limit)
3476 {
3477 someval = sh.statistics.bytes_hashed - (IO_Limit * runtime);
3478 someval /= (float) IO_Limit;
3479 if (someval < 1.0)
3480 {
3481 someval *= 1000; /* milliseconds in a second */
3482 sometime = (unsigned long) someval;
3483 retry_msleep(0, sometime);
3484 }
3485 else
3486 {
3487 sometime = (unsigned long) someval;
3488 retry_msleep (sometime, 0);
3489 }
3490 }
3491 }
3492 return;
3493}
3494
3495int sh_unix_set_io_limit (const char * c)
3496{
3497 long val;
3498
3499 SL_ENTER(_("sh_unix_set_io_limit"));
3500
3501 val = strtol (c, (char **)NULL, 10);
3502 if (val < 0)
3503 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
3504 _("set I/O limit"), c);
3505
3506 val = (val < 0 ? 0 : val);
3507
3508 IO_Limit = val * 1024;
3509 SL_RETURN( 0, _("sh_unix_set_io_limit"));
3510}
3511
3512/* obtain file info
3513 */
3514extern int flag_err_debug;
3515
3516#include "sh_ignore.h"
3517
3518int sh_unix_checksum_size (char * filename, off_t size, int is_max_size,
3519 char * fileHash, int alert_timeout, SL_TICKET fd, unsigned long mask)
3520{
3521 file_type * tmpFile;
3522 int status;
3523
3524 SL_ENTER(_("sh_unix_checksum_size"));
3525
3526 tmpFile = SH_ALLOC(sizeof(file_type));
3527 tmpFile->link_path = NULL;
3528
3529 if (sh.flag.checkSum != SH_CHECK_INIT)
3530 {
3531 /* lookup file in database */
3532 if (is_max_size == S_TRUE) {
3533 status = sh_hash_get_it (filename, tmpFile, NULL);
3534 if ((status != 0) || (tmpFile->size > size)) {
3535 goto out;
3536 }
3537 } else {
3538 tmpFile->size = size;
3539 }
3540 }
3541 else
3542 {
3543 tmpFile->size = size;
3544 }
3545
3546 /* if last <= current get checksum */
3547 if (tmpFile->size <= size)
3548 {
3549 char hashbuf[KEYBUF_SIZE];
3550 UINT64 local_length = (UINT64) (tmpFile->size < 0 ? 0 : tmpFile->size);
3551 if (sh.flag.opts == S_TRUE) sh_tiger_set_hashtype_mask(mask);
3552 sl_strlcpy(fileHash,
3553 sh_tiger_generic_hash (filename, fd, &(local_length),
3554 alert_timeout, hashbuf, sizeof(hashbuf)),
3555 KEY_LEN+1);
3556
3557 /* return */
3558 if (tmpFile->link_path) SH_FREE(tmpFile->link_path);
3559 SH_FREE(tmpFile);
3560 SL_RETURN( 0, _("sh_unix_checksum_size"));
3561 }
3562
3563 out:
3564 if (tmpFile->link_path) SH_FREE(tmpFile->link_path);
3565 SH_FREE(tmpFile);
3566 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3567 SL_RETURN( -1, _("sh_unix_checksum_size"));
3568}
3569
3570/********************************************************
3571 * Search rotated logfile
3572 */
3573extern char * sh_rotated_log_search(const char * path, struct stat * buf);
3574
3575int sh_check_rotated_log (const char * path,
3576 UINT64 old_size, UINT64 old_inode, const char * old_hash, unsigned long mask)
3577{
3578 struct stat obuf;
3579 UINT64 length_nolim = TIGER_NOLIM;
3580 int retval = S_FALSE;
3581
3582 if (old_size != length_nolim)
3583 {
3584 char hashbuf[KEYBUF_SIZE];
3585 char * rotated_file;
3586
3587 obuf.st_ino = old_inode;
3588 rotated_file = sh_rotated_log_search(path, &obuf);
3589
3590 if (rotated_file && (0 != strcmp(path, rotated_file)))
3591 {
3592 SL_TICKET fd = sl_open_fastread (FIL__, __LINE__, rotated_file, SL_YESPRIV);
3593 if (!SL_ISERROR(fd))
3594 {
3595 sh_unix_checksum_size (rotated_file, old_size, S_FALSE,
3596 hashbuf, 120 /* alert_timeout */, fd, mask);
3597
3598 sl_close(fd);
3599
3600 if (strncmp (old_hash, hashbuf, KEY_LEN) == 0) {
3601 retval = S_TRUE;
3602 }
3603 }
3604 SH_FREE(rotated_file);
3605 }
3606 }
3607 return retval;
3608}
3609
3610
3611int sh_unix_check_selinux = S_FALSE;
3612int sh_unix_check_acl = S_FALSE;
3613
3614#ifdef USE_ACL
3615
3616#include <sys/acl.h>
3617static char * sh_unix_getinfo_acl (char * path, int fd, struct stat * buf)
3618{
3619 /* system.posix_acl_access, system.posix_acl_default
3620 */
3621 char * out = NULL;
3622 char * collect = NULL;
3623 char * tmp;
3624 char * out_compact;
3625 ssize_t len;
3626 acl_t result;
3627
3628 SL_ENTER(_("sh_unix_getinfo_acl"));
3629
3630 result = (fd == -1) ?
3631 acl_get_file (path, ACL_TYPE_ACCESS) :
3632 acl_get_fd (fd);
3633
3634 if (result)
3635 {
3636 out = acl_to_text (result, &len);
3637 if (out && (len > 0)) {
3638 out_compact = sh_util_acl_compact (out, len);
3639 acl_free(out);
3640 if (out_compact)
3641 {
3642 collect = sh_util_strconcat (_("acl_access:"), out_compact, NULL);
3643 SH_FREE(out_compact);
3644 }
3645 }
3646 acl_free(result);
3647 }
3648
3649
3650 if ( S_ISDIR(buf->st_mode) )
3651 {
3652 result = acl_get_file (path, ACL_TYPE_DEFAULT);
3653
3654 if (result)
3655 {
3656 out = acl_to_text (result, &len);
3657 if (out && (len > 0)) {
3658 out_compact = sh_util_acl_compact (out, len);
3659 acl_free(out);
3660 if (out_compact) {
3661 if (collect) {
3662 tmp = sh_util_strconcat (_("acl_default:"),
3663 out_compact, ":", collect, NULL);
3664 SH_FREE(collect);
3665 }
3666 else {
3667 tmp = sh_util_strconcat (_("acl_default:"), out_compact, NULL);
3668 }
3669 SH_FREE(out_compact);
3670 collect = tmp;
3671 }
3672 }
3673 acl_free(result);
3674 }
3675 }
3676
3677 SL_RETURN((collect),_("sh_unix_getinfo_acl"));
3678}
3679#endif
3680
3681#ifdef USE_XATTR
3682
3683#include <attr/xattr.h>
3684static char * sh_unix_getinfo_xattr_int (char * path, int fd, char * name)
3685{
3686 char * out = NULL;
3687 char * tmp = NULL;
3688 size_t size = 256;
3689 ssize_t result;
3690
3691 SL_ENTER(_("sh_unix_getinfo_xattr_int"));
3692
3693 out = SH_ALLOC(size);
3694
3695 result = (fd == -1) ?
3696 lgetxattr (path, name, out, size-1) :
3697 fgetxattr (fd, name, out, size-1);
3698
3699 if (result == -1 && errno == ERANGE)
3700 {
3701 SH_FREE(out);
3702 result = (fd == -1) ?
3703 lgetxattr (path, name, NULL, 0) :
3704 fgetxattr (fd, name, NULL, 0);
3705 size = result + 1;
3706 out = SH_ALLOC(size);
3707 result = (fd == -1) ?
3708 lgetxattr (path, name, out, size-1) :
3709 fgetxattr (fd, name, out, size-1);
3710 }
3711
3712 if ((result > 0) && ((size_t)result < size))
3713 {
3714 out[size-1] = '\0';
3715 tmp = out;
3716 }
3717 else
3718 {
3719 SH_FREE(out);
3720 }
3721
3722 SL_RETURN((tmp),_("sh_unix_getinfo_xattr_int"));
3723}
3724
3725
3726static char * sh_unix_getinfo_xattr (char * path, int fd, struct stat * buf)
3727{
3728 /* system.posix_acl_access, system.posix_acl_default, security.selinux
3729 */
3730 char * tmp;
3731 char * out = NULL;
3732 char * collect = NULL;
3733
3734 SL_ENTER(_("sh_unix_getinfo_xattr"));
3735
3736#ifdef USE_ACL
3737 /*
3738 * we need the acl_get_fd/acl_get_file functions, getxattr will only
3739 * yield the raw bytes
3740 */
3741 if (sh_unix_check_acl == S_TRUE)
3742 {
3743 out = sh_unix_getinfo_acl(path, fd, buf);
3744
3745 if (out)
3746 {
3747 collect = out;
3748 }
3749 }
3750#else
3751 (void) buf;
3752#endif
3753
3754 if (sh_unix_check_selinux == S_TRUE)
3755 {
3756 out = sh_unix_getinfo_xattr_int(path, fd, _("security.selinux"));
3757
3758 if (out)
3759 {
3760 if (collect) {
3761 tmp = sh_util_strconcat(_("selinux:"), out, ":", collect, NULL);
3762 SH_FREE(collect);
3763 }
3764 else {
3765 tmp = sh_util_strconcat(_("selinux:"), out, NULL);
3766 }
3767 SH_FREE(out);
3768 collect = tmp;
3769 }
3770 }
3771
3772 SL_RETURN((collect),_("sh_unix_getinfo_xattr"));
3773}
3774#endif
3775
3776#ifdef USE_XATTR
3777int sh_unix_setcheckselinux (const char * c)
3778{
3779 int i;
3780 SL_ENTER(_("sh_unix_setcheckselinux"));
3781 i = sh_util_flagval(c, &(sh_unix_check_selinux));
3782
3783 SL_RETURN(i, _("sh_unix_setcheckselinux"));
3784}
3785#endif
3786
3787#ifdef USE_ACL
3788int sh_unix_setcheckacl (const char * c)
3789{
3790 int i;
3791 SL_ENTER(_("sh_unix_setcheckacl"));
3792 i = sh_util_flagval(c, &(sh_unix_check_acl));
3793
3794 SL_RETURN(i, _("sh_unix_setcheckacl"));
3795}
3796#endif
3797
3798#ifdef HAVE_LIBZ
3799#include <zlib.h>
3800#endif
3801
3802
3803static void * sh_dummy_filename;
3804void * sh_dummy_tmp;
3805void * sh_dummy_tmp2;
3806
3807int sh_unix_getinfo (int level, const char * filename, file_type * theFile,
3808 char * fileHash, int policy)
3809{
3810 char timestr[81];
3811 long runtim;
3812 struct stat buf;
3813 struct stat lbuf;
3814 struct stat fbuf;
3815 volatile int stat_return;
3816 volatile int stat_errno = 0;
3817
3818 ShFileType type;
3819 unsigned int mode;
3820 char * tmp;
3821 char * tmp2;
3822
3823 char * linknamebuf;
3824 volatile int linksize;
3825
3826 extern int get_the_fd (SL_TICKET ticket);
3827
3828 volatile SL_TICKET rval_open;
3829 volatile int err_open = 0;
3830
3831 volatile int fd;
3832 volatile int fstat_return;
3833 volatile int fstat_errno = 0;
3834 volatile int try = 0;
3835
3836 sh_string * content = NULL;
3837
3838 time_t tend;
3839 time_t tstart;
3840
3841
3842 char * path = NULL;
3843
3844 volatile int alert_timeout = 120;
3845
3846 path = theFile->fullpath;
3847
3848 SL_ENTER(_("sh_unix_getinfo"));
3849
3850 if (!MODI_INITIALIZED(theFile->check_flags))
3851 {
3852 tmp2 = sh_util_safe_name (theFile->fullpath);
3853 SH_MUTEX_LOCK(mutex_thread_nolog);
3854 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_SUBGPATH,
3855 _("Uninitialized check mask"), _("sh_unix_getinfo"),
3856 tmp2);
3857 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3858 SH_FREE(tmp2);
3859 SL_RETURN((-1),_("sh_unix_getinfo"));
3860 }
3861
3862 /* Take the address to keep gcc from putting it into a register.
3863 * Avoids the 'clobbered by longjmp' warning.
3864 */
3865 sh_dummy_filename = (void *) &filename;
3866 sh_dummy_tmp = (void *) &tmp;
3867 sh_dummy_tmp2 = (void *) &tmp2;
3868
3869 /* --- Stat the file, and get checksum. ---
3870 */
3871 tstart = time(NULL);
3872
3873 stat_return = retry_lstat (FIL__, __LINE__,
3874 path /* theFile->fullpath */, &buf);
3875
3876 if (stat_return)
3877 stat_errno = errno;
3878
3879 theFile->link_path = NULL;
3880
3881 try_again:
3882
3883 fd = -1;
3884 fstat_return = -1;
3885 rval_open = -1;
3886
3887 if (stat_return == 0 && S_ISREG(buf.st_mode))
3888 {
3889 rval_open = sl_open_fastread (FIL__, __LINE__,
3890 path /* theFile->fullpath */, SL_YESPRIV);
3891 if (SL_ISERROR(rval_open))
3892 {
3893 char * stale = sl_check_stale();
3894
3895 if (stale)
3896 {
3897 SH_MUTEX_LOCK(mutex_thread_nolog);
3898 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, err_open, MSG_E_SUBGEN,
3899 stale, _("sh_unix_getinfo_open"));
3900 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3901 }
3902
3903 if (errno == EBADF && try == 0) /* obsolete, but we keep this, just in case */
3904 {
3905 ++try;
3906 goto try_again;
3907 }
3908 err_open = errno;
3909 }
3910
3911 alert_timeout = 120; /* this is per 8K block now ! */
3912
3913 if (path[1] == 'p' && path[5] == '/' && path[2] == 'r' &&
3914 path[3] == 'o' && path[4] == 'c' && path[0] == '/')
3915 {
3916 /* seven is magic */
3917 alert_timeout = 7;
3918 }
3919
3920 fd = get_the_fd(rval_open);
3921 }
3922
3923 tend = time(NULL);
3924
3925 /* An unprivileged user may slow lstat/open to a crawl
3926 * with clever path/symlink setup
3927 */
3928 if ((tend - tstart) > (time_t) /* 60 */ 6)
3929 {
3930 tmp2 = sh_util_safe_name (theFile->fullpath);
3931 SH_MUTEX_LOCK(mutex_thread_nolog);
3932 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_TOOLATE,
3933 (long)(tend - tstart), tmp2);
3934 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3935 SH_FREE(tmp2);
3936 }
3937
3938 if (fd >= 0)
3939 {
3940 fstat_return = retry_fstat (FIL__, __LINE__, fd, &fbuf);
3941
3942 if (fstat_return)
3943 {
3944 char * stale;
3945
3946 fstat_errno = errno;
3947
3948 stale = sl_check_stale();
3949
3950 if (stale)
3951 {
3952 SH_MUTEX_LOCK(mutex_thread_nolog);
3953 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, fstat_errno,
3954 MSG_E_SUBGEN,
3955 stale, _("sh_unix_getinfo_fstat"));
3956 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3957 }
3958
3959 if (try == 0) /* obsolete, but we keep this, just in case */
3960 {
3961 ++try;
3962 sl_close(rval_open);
3963 goto try_again;
3964 }
3965 }
3966 }
3967 else
3968 {
3969 fd = -1;
3970 }
3971
3972
3973 /* --- case 1: lstat failed ---
3974 */
3975 if (stat_return != 0)
3976 {
3977 stat_return = errno;
3978 if (!SL_ISERROR(rval_open))
3979 sl_close(rval_open);
3980 if (sh.flag.checkSum == SH_CHECK_INIT ||
3981 (sh_hash_have_it (theFile->fullpath) >= 0 &&
3982 (!SH_FFLAG_REPORTED_SET(theFile->file_reported))))
3983 {
3984 if (S_FALSE == sh_ignore_chk_del(theFile->fullpath)) {
3985 int flags = sh_hash_getflags (theFile->fullpath);
3986
3987 if ((flags >= 0) && (flags & SH_FFLAG_ENOENT) == 0) {
3988 char errbuf[SH_ERRBUF_SIZE];
3989 uid_t euid;
3990 (void) sl_get_euid(&euid);
3991 tmp2 = sh_util_safe_name (theFile->fullpath);
3992 SH_MUTEX_LOCK(mutex_thread_nolog);
3993 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
3994 _("lstat"),
3995 sh_error_message (stat_errno, errbuf, sizeof(errbuf)),
3996 (long) euid,
3997 tmp2);
3998 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3999 SH_FREE(tmp2);
4000 sh_hash_set_flag (theFile->fullpath, SH_FFLAG_ENOENT);
4001 }
4002 }
4003 }
4004 SL_RETURN((-1),_("sh_unix_getinfo"));
4005 }
4006
4007 /* --- case 2: not a regular file ---
4008 */
4009 else if (! S_ISREG(buf.st_mode))
4010 {
4011 if (fileHash != NULL)
4012 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4013 }
4014
4015 /* --- case 3a: a regular file, fstat ok ---
4016 */
4017 else if (fstat_return == 0 &&
4018 buf.st_mode == fbuf.st_mode &&
4019 buf.st_ino == fbuf.st_ino &&
4020 buf.st_uid == fbuf.st_uid &&
4021 buf.st_gid == fbuf.st_gid &&
4022 buf.st_dev == fbuf.st_dev )
4023 {
4024 if (fileHash != NULL)
4025 {
4026 if ((theFile->check_flags & MODI_CHK) == 0 ||
4027 sh_restrict_this(theFile->fullpath, (UINT64) fbuf.st_size,
4028 (UINT64) fbuf.st_mode, rval_open))
4029 {
4030 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4031 }
4032 else if ((theFile->check_flags & MODI_PREL) != 0 &&
4033 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
4034 alert_timeout, theFile->fullpath))
4035 {
4036 if (0 != sh_prelink_run (theFile->fullpath,
4037 fileHash, alert_timeout, theFile->check_flags))
4038 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4039 }
4040 else
4041 {
4042 char hashbuf[KEYBUF_SIZE];
4043 UINT64 length_current = TIGER_NOLIM;
4044
4045 if (MODI_TXT_ENABLED(theFile->check_flags) && fbuf.st_size < (10 * SH_TXT_MAX))
4046 {
4047 sl_init_content (rval_open, fbuf.st_size);
4048 }
4049
4050 if (sh.flag.opts == S_TRUE) sh_tiger_set_hashtype_mask(theFile->check_flags);
4051 sl_strlcpy(fileHash,
4052 sh_tiger_generic_hash (theFile->fullpath,
4053 rval_open, &length_current,
4054 alert_timeout,
4055 hashbuf, sizeof(hashbuf)),
4056 KEY_LEN+1);
4057
4058 content = sl_get_content(rval_open);
4059 content = sh_string_copy(content);
4060
4061 if ((theFile->check_flags & MODI_SGROW) != 0)
4062 {
4063 /* Update size so it matches the one for which the checksum
4064 has been computed */
4065 fbuf.st_size = length_current;
4066 buf.st_size = fbuf.st_size;
4067 sl_rewind(rval_open);
4068 sh_unix_checksum_size (theFile->fullpath, length_current, S_TRUE,
4069 &fileHash[KEY_LEN + 1],
4070 alert_timeout, rval_open, theFile->check_flags);
4071 }
4072 }
4073 }
4074 }
4075
4076 /* --- case 3b: a regular file, fstat ok, but different ---
4077 */
4078 else if (fstat_return == 0 && S_ISREG(fbuf.st_mode))
4079 {
4080 memcpy (&buf, &fbuf, sizeof( struct stat ));
4081
4082 if (fileHash != NULL)
4083 {
4084 if ((theFile->check_flags & MODI_CHK) == 0 ||
4085 sh_restrict_this(theFile->fullpath, (UINT64) fbuf.st_size,
4086 (UINT64) fbuf.st_mode, rval_open))
4087 {
4088 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4089 }
4090 else if (policy == SH_LEVEL_PRELINK &&
4091 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
4092 alert_timeout, theFile->fullpath))
4093 {
4094 if (0 != sh_prelink_run (theFile->fullpath,
4095 fileHash, alert_timeout, theFile->check_flags))
4096 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4097 }
4098 else
4099 {
4100 char hashbuf[KEYBUF_SIZE];
4101 UINT64 length_current = TIGER_NOLIM;
4102
4103 if (MODI_TXT_ENABLED(theFile->check_flags) && fbuf.st_size < (10 * SH_TXT_MAX))
4104 {
4105 sl_init_content (rval_open, fbuf.st_size);
4106 }
4107
4108 if (sh.flag.opts == S_TRUE) sh_tiger_set_hashtype_mask(theFile->check_flags);
4109 sl_strlcpy(fileHash,
4110 sh_tiger_generic_hash (theFile->fullpath, rval_open,
4111 &length_current,
4112 alert_timeout,
4113 hashbuf, sizeof(hashbuf)),
4114 KEY_LEN + 1);
4115
4116 content = sl_get_content(rval_open);
4117 content = sh_string_copy(content);
4118
4119 if ((theFile->check_flags & MODI_SGROW) != 0)
4120 {
4121 /* Update size so it matches the one for which the checksum
4122 has been computed */
4123 fbuf.st_size = length_current;
4124 buf.st_size = fbuf.st_size;
4125 sl_rewind(rval_open);
4126 sh_unix_checksum_size (theFile->fullpath, length_current, S_TRUE,
4127 &fileHash[KEY_LEN + 1],
4128 alert_timeout, rval_open, theFile->check_flags);
4129 }
4130 }
4131 }
4132 }
4133
4134 /* --- case 4: a regular file, fstat failed ---
4135 */
4136
4137 else /* fstat_return != 0 or !S_ISREG(fbuf.st_mode) or open() failed */
4138 {
4139 uid_t euid;
4140
4141 if (fileHash != NULL)
4142 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4143
4144 if ((theFile->check_flags & MODI_CHK) != 0)
4145 {
4146 tmp2 = sh_util_safe_name (theFile->fullpath);
4147
4148
4149 if (fd >= 0 && fstat_return != 0)
4150 {
4151 char errbuf[SH_ERRBUF_SIZE];
4152 (void) sl_get_euid(&euid);
4153
4154 SH_MUTEX_LOCK(mutex_thread_nolog);
4155 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
4156 _("fstat"),
4157 sh_error_message (fstat_errno, errbuf, sizeof(errbuf)),
4158 (long) euid,
4159 tmp2);
4160 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4161 }
4162 else if (fd >= 0 && !S_ISREG(fbuf.st_mode))
4163 {
4164 SH_MUTEX_LOCK(mutex_thread_nolog);
4165 sh_error_handle (level, FIL__, __LINE__, fstat_errno,
4166 MSG_E_NOTREG, tmp2);
4167 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4168 }
4169 else
4170 {
4171 char errbuf[SH_ERRBUF_SIZE];
4172 char errbuf2[SH_ERRBUF_SIZE];
4173 sl_strlcpy(errbuf, sl_error_string(rval_open), sizeof(errbuf));
4174 sh_error_message(err_open, errbuf2, sizeof(errbuf2));
4175 SH_MUTEX_LOCK(mutex_thread_nolog);
4176 sh_error_handle (level, FIL__, __LINE__, err_open,
4177 MSG_E_READ, errbuf, errbuf2, tmp2);
4178 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4179 }
4180 SH_FREE(tmp2);
4181 }
4182 }
4183
4184
4185 /* --- Determine file type. ---
4186 */
4187 memset (theFile->c_mode, '-', CMODE_SIZE-1);
4188 theFile->c_mode[CMODE_SIZE-1] = '\0';
4189
4190 memset (theFile->link_c_mode, '-', CMODE_SIZE-1);
4191 theFile->link_c_mode[CMODE_SIZE-1] = '\0';
4192
4193 sh_unix_getinfo_type (&buf, &type, theFile->c_mode);
4194 theFile->type = type;
4195
4196#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
4197
4198 /* --- Determine file attributes. ---
4199 */
4200 memset (theFile->c_attributes, '-', ATTRBUF_SIZE);
4201 theFile->c_attributes[ATTRBUF_USED] = '\0';
4202 theFile->attributes = 0;
4203
4204#if (defined(__linux__) && (defined(HAVE_LINUX_EXT2_FS_H) || defined(HAVE_EXT2FS_EXT2_FS_H))) || defined(HAVE_STAT_FLAGS)
4205 if (theFile->c_mode[0] != 'c' && theFile->c_mode[0] != 'b' &&
4206 theFile->c_mode[0] != 'l' )
4207 sh_unix_getinfo_attr(theFile->fullpath,
4208 &theFile->attributes, theFile->c_attributes,
4209 fd, &buf);
4210#endif
4211#endif
4212
4213#if defined(USE_XATTR) && defined(USE_ACL)
4214 if (sh_unix_check_selinux == S_TRUE || sh_unix_check_acl == S_TRUE)
4215 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
4216#elif defined(USE_XATTR)
4217 if (sh_unix_check_selinux == S_TRUE)
4218 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
4219#elif defined(USE_ACL)
4220 if (sh_unix_check_acl == S_TRUE)
4221 theFile->attr_string = sh_unix_getinfo_acl (theFile->fullpath, fd, &buf);
4222#else
4223 theFile->attr_string = NULL;
4224#endif
4225
4226 if (!SL_ISERROR(rval_open))
4227 sl_close(rval_open);
4228
4229
4230 /* --- I/O limit. ---
4231 */
4232 if (IO_Limit > 0)
4233 {
4234 runtim = (long) (time(NULL) - sh.statistics.time_start);
4235
4236 if (runtim > 0 && (long)(sh.statistics.bytes_hashed/runtim) > IO_Limit)
4237 retry_msleep(1, 0);
4238 }
4239
4240 /* --- Determine permissions. ---
4241 */
4242 sh_unix_getinfo_mode (&buf, &mode, theFile->c_mode);
4243
4244 /* --- Trivia. ---
4245 */
4246 theFile->dev = buf.st_dev;
4247 theFile->ino = buf.st_ino;
4248 theFile->mode = buf.st_mode;
4249 theFile->hardlinks = buf.st_nlink;
4250 theFile->owner = buf.st_uid;
4251 theFile->group = buf.st_gid;
4252 theFile->rdev = buf.st_rdev;
4253 theFile->size = buf.st_size;
4254 theFile->blksize = (unsigned long) buf.st_blksize;
4255 theFile->blocks = (unsigned long) buf.st_blocks;
4256 theFile->atime = buf.st_atime;
4257 theFile->mtime = buf.st_mtime;
4258 theFile->ctime = buf.st_ctime;
4259
4260
4261 /* --- Owner and group. ---
4262 */
4263
4264 if (NULL == sh_unix_getGIDname(SH_ERR_ALL, buf.st_gid, theFile->c_group, GROUP_MAX+1)) {
4265
4266 tmp2 = sh_util_safe_name (theFile->fullpath);
4267
4268 if (policy == SH_LEVEL_ALLIGNORE)
4269 {
4270 SH_MUTEX_LOCK(mutex_thread_nolog);
4271 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
4272 MSG_FI_NOGRP,
4273 (long) buf.st_gid, tmp2);
4274 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4275 }
4276 else
4277 {
4278 SH_MUTEX_LOCK(mutex_thread_nolog);
4279 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
4280 MSG_FI_NOGRP,
4281 (long) buf.st_gid, tmp2);
4282 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4283 }
4284 SH_FREE(tmp2);
4285 sl_snprintf(theFile->c_group, GROUP_MAX+1, "%d", (long) buf.st_gid);
4286 }
4287
4288
4289 if (NULL == sh_unix_getUIDname(SH_ERR_ALL, buf.st_uid, theFile->c_owner, USER_MAX+1)) {
4290
4291 tmp2 = sh_util_safe_name (theFile->fullpath);
4292
4293 if (policy == SH_LEVEL_ALLIGNORE)
4294 {
4295 SH_MUTEX_LOCK(mutex_thread_nolog);
4296 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
4297 MSG_FI_NOUSR,
4298 (long) buf.st_uid, tmp2);
4299 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4300 }
4301 else
4302 {
4303 SH_MUTEX_LOCK(mutex_thread_nolog);
4304 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
4305 MSG_FI_NOUSR,
4306 (long) buf.st_uid, tmp2);
4307 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4308 }
4309 SH_FREE(tmp2);
4310 sl_snprintf(theFile->c_owner, USER_MAX+1, "%d", (long) buf.st_uid);
4311 }
4312
4313 /* --- Output the file. ---
4314 */
4315 if (flag_err_debug == S_TRUE)
4316 {
4317 tmp2 = sh_util_safe_name ((filename == NULL) ?
4318 theFile->fullpath : filename);
4319 (void) sh_unix_time(theFile->mtime, timestr, sizeof(timestr));
4320 SH_MUTEX_LOCK(mutex_thread_nolog);
4321 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LIST,
4322 theFile->c_mode,
4323 theFile->hardlinks,
4324 theFile->c_owner,
4325 theFile->c_group,
4326 (unsigned long) theFile->size,
4327 timestr,
4328 tmp2);
4329 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4330 SH_FREE(tmp2);
4331 }
4332
4333 /* --- Check for links. ---
4334 */
4335 if (theFile->c_mode[0] == 'l')
4336 {
4337 linknamebuf = SH_ALLOC(PATH_MAX);
4338
4339 /* flawfinder: ignore */
4340 linksize = readlink (theFile->fullpath, linknamebuf, PATH_MAX-1);
4341
4342 if (linksize < (PATH_MAX-1) && linksize >= 0)
4343 linknamebuf[linksize] = '\0';
4344 else
4345 linknamebuf[PATH_MAX-1] = '\0';
4346
4347 if (linksize < 0)
4348 {
4349 char errbuf[SH_ERRBUF_SIZE];
4350 linksize = errno;
4351 tmp2 = sh_util_safe_name (theFile->fullpath);
4352 SH_MUTEX_LOCK(mutex_thread_nolog);
4353 sh_error_handle (level, FIL__, __LINE__, linksize, MSG_FI_RDLNK,
4354 sh_error_message (linksize, errbuf, sizeof(errbuf)), tmp2);
4355 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4356 SH_FREE(tmp2);
4357 SH_FREE(linknamebuf);
4358 theFile->link_path = sh_util_strdup("-");
4359 SL_RETURN((-1),_("sh_unix_getinfo"));
4360 }
4361
4362 if (linknamebuf[0] == '/')
4363 {
4364 theFile->link_path = sh_util_strdup (linknamebuf);
4365 }
4366 else
4367 {
4368 tmp = sh_util_dirname(theFile->fullpath);
4369 if (tmp) {
4370 theFile->link_path = SH_ALLOC(PATH_MAX);
4371 sl_strlcpy (theFile->link_path, tmp, PATH_MAX);
4372 SH_FREE(tmp);
4373 } else {
4374 theFile->link_path = SH_ALLOC(PATH_MAX);
4375 theFile->link_path[0] = '\0';
4376 }
4377 /*
4378 * Only attach '/' if not root directory. Handle "//", which
4379 * according to POSIX is implementation-defined, and may be
4380 * different from "/" (however, three or more '/' will collapse
4381 * to one).
4382 */
4383 tmp = theFile->link_path; while (*tmp == '/') ++tmp;
4384 if (*tmp != '\0')
4385 {
4386 sl_strlcat (theFile->link_path, "/", PATH_MAX);
4387 }
4388 sl_strlcat (theFile->link_path, linknamebuf, PATH_MAX);
4389 }
4390
4391 /* stat the link
4392 */
4393 stat_return = retry_lstat (FIL__, __LINE__, theFile->link_path, &lbuf);
4394
4395 /* check for error
4396 */
4397 if (stat_return != 0)
4398 {
4399 stat_return = errno;
4400 tmp = sh_util_safe_name (theFile->fullpath);
4401 tmp2 = sh_util_safe_name (theFile->link_path);
4402 if (stat_return != ENOENT)
4403 {
4404 uid_t euid;
4405 char errbuf[SH_ERRBUF_SIZE];
4406
4407 (void) sl_get_euid(&euid);
4408 SH_MUTEX_LOCK(mutex_thread_nolog);
4409 sh_error_handle (level, FIL__, __LINE__, stat_return,
4410 MSG_FI_STAT,
4411 _("lstat (link target)"),
4412 sh_error_message (stat_return,errbuf, sizeof(errbuf)),
4413 (long) euid,
4414 tmp2);
4415 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4416 }
4417 else
4418 {
4419 /* a dangling link -- everybody seems to have plenty of them
4420 */
4421 SH_MUTEX_LOCK(mutex_thread_nolog);
4422 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_DLNK,
4423 tmp, tmp2);
4424 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4425 }
4426 theFile->linkisok = BAD;
4427 SH_FREE(tmp);
4428 SH_FREE(tmp2);
4429 SH_FREE(linknamebuf);
4430 /*
4431 * changed Tue Feb 10 16:16:13 CET 2004:
4432 * add dangling symlinks into database
4433 * SL_RETURN((-1),_("sh_unix_getinfo"));
4434 */
4435 theFile->linkmode = 0;
4436 SL_RETURN((0),_("sh_unix_getinfo"));
4437 }
4438
4439 theFile->linkisok = GOOD;
4440
4441
4442 /* --- Determine file type. ---
4443 */
4444 sh_unix_getinfo_type (&lbuf, &type, theFile->link_c_mode);
4445 theFile->type = type;
4446
4447 /* --- Determine permissions. ---
4448 */
4449 sh_unix_getinfo_mode (&lbuf, &mode, theFile->link_c_mode);
4450 theFile->linkmode = lbuf.st_mode;
4451
4452 /* --- Output the link. ---
4453 */
4454 if (theFile->linkisok == GOOD)
4455 {
4456 tmp2 = sh_util_safe_name (linknamebuf);
4457 SH_MUTEX_LOCK(mutex_thread_nolog);
4458 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LLNK,
4459 theFile->link_c_mode, tmp2);
4460 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4461 SH_FREE(tmp2);
4462 }
4463 SH_FREE(linknamebuf);
4464 }
4465 else /* not a link, theFile->c_mode[0] != 'l' */
4466 {
4467 if (content)
4468 {
4469#ifdef HAVE_LIBZ
4470 unsigned long clen;
4471 unsigned char * compressed;
4472#ifdef HAVE_COMPRESSBOUND
4473 clen = compressBound(sh_string_len(content));
4474#else
4475 if (sh_string_len(content) > 10*SH_TXT_MAX)
4476 clen = SH_TXT_MAX;
4477 else
4478 clen = 13 + (int)(1.0001*sh_string_len(content));
4479#endif
4480 compressed = SH_ALLOC(clen);
4481 if (Z_OK == compress(compressed, &clen,
4482 (unsigned char *) sh_string_str(content),
4483 sh_string_len(content)))
4484 {
4485 if (clen < SH_TXT_MAX)
4486 {
4487 sh_util_base64_enc_alloc (&(theFile->link_path),
4488 (char *) compressed, clen);
4489 }
4490 else
4491 {
4492 char tmsg[128];
4493 char * tpath = sh_util_safe_name (theFile->fullpath);
4494 sl_snprintf(tmsg, sizeof(tmsg),
4495 _("compressed file too large (%lu bytes)"),
4496 clen);
4497 SH_MUTEX_LOCK(mutex_thread_nolog);
4498 sh_error_handle (SH_ERR_WARN, FIL__, __LINE__, -1,
4499 MSG_E_SUBGPATH, tmsg,
4500 _("sh_unix_getinfo"), tpath);
4501 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4502 SH_FREE(tpath);
4503 }
4504 }
4505 SH_FREE(compressed);
4506#endif
4507 sh_string_destroy(&content);
4508 }
4509 }
4510 SL_RETURN((0),_("sh_unix_getinfo"));
4511}
4512
4513/* #if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE) */
4514#endif
4515
4516int sh_unix_unlock(char * lockfile, char * flag)
4517{
4518 int error = 0;
4519
4520 SL_ENTER(_("sh_unix_unlock"));
4521
4522 if (sh.flag.isdaemon == S_FALSE && flag == NULL)
4523 SL_RETURN((0),_("sh_unix_unlock"));
4524
4525 /* --- Logfile is not locked to us. ---
4526 */
4527 if (sh.flag.islocked == BAD && flag != NULL)
4528 SL_RETURN((-1),_("sh_unix_unlock"));
4529
4530 /* --- Check whether the directory is secure. ---
4531 */
4532 if (0 != tf_trust_check (lockfile, SL_YESPRIV))
4533 SL_RETURN((-1),_("sh_unix_unlock"));
4534
4535 /* --- Delete the lock file. ---
4536 */
4537 error = retry_aud_unlink (FIL__, __LINE__, lockfile);
4538
4539 if (error == 0)
4540 {
4541 if (flag != NULL)
4542 sh.flag.islocked = BAD; /* not locked anymore */
4543 }
4544 else if (flag != NULL)
4545 {
4546 char errbuf[SH_ERRBUF_SIZE];
4547 error = errno;
4548 sh_error_handle ((-1), FIL__, __LINE__, error, MSG_E_UNLNK,
4549 sh_error_message(error, errbuf, sizeof(errbuf)),
4550 lockfile);
4551 SL_RETURN((-1),_("sh_unix_unlock"));
4552 }
4553 SL_RETURN((0),_("sh_unix_unlock"));
4554}
4555
4556int sh_unix_check_piddir (char * pidpath)
4557{
4558 static struct stat buf;
4559 int status = 0;
4560 char * pid_dir;
4561
4562 SL_ENTER(_("sh_unix_check_piddir"));
4563
4564 pid_dir = sh_util_dirname (pidpath);
4565
4566 status = retry_lstat (FIL__, __LINE__, pid_dir, &buf);
4567
4568 if (status < 0 && errno == ENOENT)
4569 {
4570 status = mkdir (pid_dir, 0777);
4571 if (status < 0)
4572 {
4573 sh_error_handle ((-1), FIL__, __LINE__, status,
4574 MSG_E_SUBGEN,
4575 _("Cannot create PID directory"),
4576 _("sh_unix_check_piddir"));
4577 SH_FREE(pid_dir);
4578 SL_RETURN((-1),_("sh_unix_check_piddir"));
4579 }
4580 }
4581 else if (!S_ISDIR(buf.st_mode))
4582 {
4583 sh_error_handle ((-1), FIL__, __LINE__, status,
4584 MSG_E_SUBGEN,
4585 _("Path of PID directory refers to a non-directory object"),
4586 _("sh_unix_check_piddir"));
4587 SH_FREE(pid_dir);
4588 SL_RETURN((-1),_("sh_unix_check_piddir"));
4589 }
4590 SH_FREE(pid_dir);
4591 SL_RETURN((0),_("sh_unix_check_piddir"));
4592}
4593
4594int sh_unix_lock (char * lockfile, char * flag)
4595{
4596 int filed;
4597 int errnum;
4598 char myPid[64];
4599 SL_TICKET fd;
4600 extern int get_the_fd (SL_TICKET ticket);
4601
4602 SL_ENTER(_("sh_unix_lock"));
4603
4604 sprintf (myPid, "%ld\n", (long) sh.pid); /* known to fit */
4605
4606 if (flag == NULL) /* PID file, check for directory */
4607 {
4608 if (0 != sh_unix_check_piddir (lockfile))
4609 {
4610 SL_RETURN((-1),_("sh_unix_lock"));
4611 }
4612 }
4613
4614 fd = sl_open_safe_rdwr (FIL__, __LINE__,
4615 lockfile, SL_YESPRIV); /* fails if file exists */
4616
4617 if (!SL_ISERROR(fd))
4618 {
4619 errnum = sl_write (fd, myPid, sl_strlen(myPid));
4620 filed = get_the_fd(fd);
4621 fchmod (filed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
4622 sl_close (fd);
4623
4624 if (!SL_ISERROR(errnum))
4625 {
4626 if (flag != NULL)
4627 sh.flag.islocked = GOOD;
4628 SL_RETURN((0),_("sh_unix_lock"));
4629 }
4630 }
4631
4632 TPT((0, FIL__, __LINE__, _("msg=<open pid file failed>\n")));
4633 if (flag != NULL)
4634 sh.flag.islocked = BAD;
4635 SL_RETURN((-1),_("sh_unix_lock"));
4636
4637 /* notreached */
4638}
4639
4640
4641/* check whether file is locked
4642 */
4643int sh_unix_test_and_lock (char * filename, char * lockfile)
4644{
4645 static struct stat buf;
4646 int status = 0;
4647
4648
4649 SL_TICKET fd;
4650 char line_in[128];
4651
4652 SL_ENTER(_("sh_unix_test_and_lock"));
4653
4654 status = retry_lstat (FIL__, __LINE__, lockfile, &buf);
4655
4656 /* --- No lock file found, try to lock. ---
4657 */
4658
4659 if (status < 0 && errno == ENOENT)
4660 {
4661 if (0 == sh_unix_lock (lockfile, filename))
4662 {
4663 if (filename != NULL)
4664 sh.flag.islocked = GOOD;
4665 SL_RETURN((0),_("sh_unix_test_and_lock"));
4666 }
4667 else
4668 {
4669 sh_error_handle ((-1), FIL__, __LINE__, status,
4670 MSG_E_SUBGEN,
4671 (filename == NULL) ? _("Cannot create PID file (1)") : _("Cannot create lock file (1)"),
4672 _("sh_unix_test_and_lock"));
4673 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4674 }
4675 }
4676 else if (status == 0 && buf.st_size == 0)
4677 {
4678 if (filename != NULL)
4679 sh.flag.islocked = GOOD;
4680 sh_unix_unlock (lockfile, filename);
4681 if (filename != NULL)
4682 sh.flag.islocked = BAD;
4683 if (0 == sh_unix_lock (lockfile, filename))
4684 {
4685 if (filename != NULL)
4686 sh.flag.islocked = GOOD;
4687 SL_RETURN((0),_("sh_unix_test_and_lock"));
4688 }
4689 else
4690 {
4691 sh_error_handle ((-1), FIL__, __LINE__, status,
4692 MSG_E_SUBGEN,
4693 (filename == NULL) ? _("Cannot create PID file (2)") : _("Cannot create lock file (2)"),
4694 _("sh_unix_test_and_lock"));
4695 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4696 }
4697 }
4698
4699 /* --- Check on lock. ---
4700 */
4701
4702 if (status >= 0)
4703 {
4704 fd = sl_open_read (FIL__, __LINE__, lockfile, SL_YESPRIV);
4705 if (SL_ISERROR(fd))
4706 sh_error_handle ((-1), FIL__, __LINE__, fd,
4707 MSG_E_SUBGEN,
4708 (filename == NULL) ? _("Cannot open PID file for read") : _("Cannot open lock file for read"),
4709 _("sh_unix_test_and_lock"));
4710 }
4711 else
4712 fd = -1;
4713
4714 if (!SL_ISERROR(fd))
4715 {
4716 /* read the PID in the lock file
4717 */
4718 status = sl_read (fd, line_in, sizeof(line_in));
4719 line_in[sizeof(line_in)-1] = '\0';
4720
4721 /* convert to numeric
4722 */
4723 if (status > 0)
4724 {
4725 errno = 0;
4726 status = strtol(line_in, (char **)NULL, 10);
4727 if (errno == ERANGE || status <= 0)
4728 {
4729 sh_error_handle ((-1), FIL__, __LINE__, status,
4730 MSG_E_SUBGEN,
4731 (filename == NULL) ? _("Bad PID in PID file") : _("Bad PID in lock file"),
4732 _("sh_unix_test_and_lock"));
4733
4734 status = -1;
4735 }
4736 }
4737 else
4738 {
4739 sh_error_handle ((-1), FIL__, __LINE__, status,
4740 MSG_E_SUBGEN,
4741 (filename == NULL) ? _("Cannot read PID file") : _("Cannot read lock file"),
4742 _("sh_unix_test_and_lock"));
4743 }
4744 sl_close(fd);
4745
4746 if (status > 0 && (unsigned int) status == sh.pid)
4747 {
4748 if (filename != NULL)
4749 sh.flag.islocked = GOOD;
4750 SL_RETURN((0),_("sh_unix_test_and_lock"));
4751 }
4752
4753
4754 /* --- Check whether the process exists. ---
4755 */
4756 if (status > 0)
4757 {
4758 errno = 0;
4759 status = aud_kill (FIL__, __LINE__, status, 0);
4760
4761 /* Does not exist, so remove the stale lock
4762 * and create a new one.
4763 */
4764 if (status < 0 && errno == ESRCH)
4765 {
4766 if (filename != NULL)
4767 sh.flag.islocked = GOOD;
4768 if (0 != sh_unix_unlock(lockfile, filename) && (filename !=NULL))
4769 sh.flag.islocked = BAD;
4770 else
4771 {
4772 if (0 == sh_unix_lock (lockfile, filename))
4773 {
4774 if (filename != NULL)
4775 sh.flag.islocked = GOOD;
4776 SL_RETURN((0),_("sh_unix_test_and_lock"));
4777 }
4778 else
4779 {
4780 sh_error_handle ((-1), FIL__, __LINE__, status,
4781 MSG_E_SUBGEN,
4782 (filename == NULL) ? _("Cannot create PID file (3)") : _("Cannot create lock file (3)"),
4783 _("sh_unix_test_and_lock"));
4784 }
4785 if (filename != NULL)
4786 sh.flag.islocked = BAD;
4787 }
4788 }
4789 else
4790 {
4791 sh_error_handle ((-1), FIL__, __LINE__, status,
4792 MSG_E_SUBGEN,
4793 (filename == NULL) ? _("Cannot remove stale PID file, PID may be a running process") : _("Cannot remove stale lock file, PID may be a running process"),
4794 _("sh_unix_test_and_lock"));
4795 if (filename != NULL)
4796 sh.flag.islocked = BAD;
4797 }
4798 }
4799 }
4800 SL_RETURN((-1),_("sh_unix_testlock"));
4801}
4802
4803/* write the PID file
4804 */
4805int sh_unix_write_pid_file()
4806{
4807 return sh_unix_test_and_lock(NULL, sh.srvlog.alt);
4808}
4809
4810/* write lock for filename
4811 */
4812int sh_unix_write_lock_file(char * filename)
4813{
4814 size_t len;
4815 int res;
4816 char * lockfile;
4817
4818 if (filename == NULL)
4819 return (-1);
4820
4821 len = sl_strlen(filename);
4822 if (sl_ok_adds(len, 6))
4823 len += 6;
4824 lockfile = SH_ALLOC(len);
4825 sl_strlcpy(lockfile, filename, len);
4826 sl_strlcat(lockfile, _(".lock"), len);
4827 res = sh_unix_test_and_lock(filename, lockfile);
4828 SH_FREE(lockfile);
4829 return res;
4830}
4831
4832/* rm lock for filename
4833 */
4834int sh_unix_rm_lock_file(char * filename)
4835{
4836 size_t len;
4837 int res;
4838 char * lockfile;
4839
4840 if (filename == NULL)
4841 return (-1);
4842
4843 len = sl_strlen(filename);
4844 if (sl_ok_adds(len, 6))
4845 len += 6;
4846 lockfile = SH_ALLOC(len);
4847 sl_strlcpy(lockfile, filename, len);
4848 sl_strlcat(lockfile, _(".lock"), len);
4849
4850 res = sh_unix_unlock(lockfile, filename);
4851 SH_FREE(lockfile);
4852 return res;
4853}
4854
4855/* rm lock for filename
4856 */
4857int sh_unix_rm_pid_file()
4858{
4859 return sh_unix_unlock(sh.srvlog.alt, NULL);
4860}
4861
4862/* Test whether file exists
4863 */
4864int sh_unix_file_exists(char * path)
4865{
4866 struct stat buf;
4867
4868 SL_ENTER(_("sh_unix_file_exists"));
4869
4870 if (0 == retry_lstat(FIL__, __LINE__, path, &buf))
4871 SL_RETURN( S_TRUE, _("sh_unix_file_exists"));
4872 else
4873 SL_RETURN( S_FALSE, _("sh_unix_file_exists"));
4874}
4875
4876
4877/* Test whether file exists, is a character device, and allows read
4878 * access.
4879 */
4880int sh_unix_device_readable(int fd)
4881{
4882 struct stat buf;
4883
4884 SL_ENTER(_("sh_unix_device_readable"));
4885
4886 if (retry_fstat(FIL__, __LINE__, fd, &buf) == -1)
4887 SL_RETURN( (-1), _("sh_unix_device_readable"));
4888 else if ( S_ISCHR(buf.st_mode) && 0 != (S_IROTH & buf.st_mode) )
4889 SL_RETURN( (0), _("sh_unix_device_readable"));
4890 else
4891 SL_RETURN( (-1), _("sh_unix_device_readable"));
4892}
4893
4894static char preq[16];
4895
4896/* return true if database is remote
4897 */
4898int file_is_remote ()
4899{
4900 static int init = 0;
4901 struct stat buf;
4902
4903 SL_ENTER(_("file_is_remote"));
4904
4905 if (init == 0)
4906 {
4907 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4908 ++init;
4909 }
4910 if (0 == sl_strncmp (sh.data.path, preq, 15))
4911 {
4912 if (sh.data.path[15] != '\0') /* should be start of path */
4913 {
4914 if (0 == stat(&(sh.data.path[15]), &buf))
4915 {
4916 SL_RETURN( S_FALSE, _("file_is_remote"));
4917 }
4918 else
4919 {
4920 char * tmp = sh_util_safe_name (&(sh.data.path[15]));
4921 sh_error_handle((-1), FIL__, __LINE__, S_FALSE, MSG_E_SUBGPATH,
4922 _("No local baseline database at expected path"),
4923 _("file_is_remote"),
4924 tmp);
4925 SH_FREE(tmp);
4926 }
4927 }
4928 else
4929 {
4930 sh_error_handle((-1), FIL__, __LINE__, S_FALSE, MSG_E_SUBGEN,
4931 _("No local baseline database path known"),
4932 _("file_is_remote"));
4933 }
4934 SL_RETURN( S_TRUE, _("file_is_remote"));
4935 }
4936 SL_RETURN( S_FALSE, _("file_is_remote"));
4937}
4938
4939/* Return the path to the configuration/database file.
4940 */
4941char * file_path(char what, char flag)
4942{
4943 static int init = 0;
4944
4945 SL_ENTER(_("file_path"));
4946
4947 if (init == 0)
4948 {
4949 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4950 ++init;
4951 }
4952
4953 switch (what)
4954 {
4955
4956 case 'C':
4957 if (0 == sl_strncmp (sh.conf.path, preq, 15))
4958 {
4959#if defined(SH_WITH_SERVER)
4960 if (sh.flag.isserver == S_TRUE && sl_strlen(sh.conf.path) == 15)
4961 SL_RETURN( NULL, _("file_path"));
4962 if (sh.flag.isserver == S_TRUE)
4963 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4964#endif
4965 if (flag == 'R')
4966 SL_RETURN( preq, _("file_path"));
4967 if (flag == 'I')
4968 {
4969 if (sl_strlen(sh.conf.path) == 15)
4970 SL_RETURN( NULL, _("file_path"));
4971 else
4972 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4973 }
4974 SL_RETURN ( preq, _("file_path"));
4975 }
4976 else
4977 SL_RETURN( sh.conf.path, _("file_path"));
4978 /* break; *//* unreachable */
4979
4980 case 'D':
4981 if (0 == sl_strncmp (sh.data.path, preq, 15))
4982 {
4983 if (flag == 'R')
4984 SL_RETURN( preq, _("file_path"));
4985 if (flag == 'W' && sl_strlen(sh.data.path) == 15)
4986 SL_RETURN (NULL, _("file_path"));
4987 if (flag == 'W')
4988 SL_RETURN( &(sh.data.path[15]), _("file_path"));
4989 }
4990 else
4991 SL_RETURN( sh.data.path, _("file_path"));
4992 break;
4993
4994 default:
4995 SL_RETURN( NULL, _("file_path"));
4996 }
4997
4998 return NULL; /* notreached */
4999}
5000/************************************************/
5001/**** Mlock Utilities ****/
5002/************************************************/
5003
5004#include <limits.h>
5005
5006int sh_unix_pagesize()
5007{
5008 int pagesize = 4096;
5009#if defined(_SC_PAGESIZE)
5010 pagesize = sysconf(_SC_PAGESIZE);
5011#elif defined(_SC_PAGE_SIZE)
5012 pagesize = sysconf(_SC_PAGE_SIZE);
5013#elif defined(HAVE_GETPAGESIZE)
5014 pagesize = getpagesize();
5015#elif defined(PAGESIZE)
5016 pagesize = PAGESIZE;
5017#endif
5018
5019 return ((pagesize > 0) ? pagesize : 4096);
5020}
5021
5022typedef struct sh_page_lt {
5023 unsigned long page_start;
5024 int page_refcount;
5025 char file[64];
5026 int line;
5027 struct sh_page_lt * next;
5028} sh_page_l;
5029
5030sh_page_l * sh_page_locked = NULL;
5031volatile int page_locking = 0;
5032
5033unsigned long sh_unix_lookup_page (void * in_addr, size_t len, int * num_pages)
5034{
5035 int pagesize = sh_unix_pagesize();
5036 unsigned long addr = (unsigned long) in_addr;
5037
5038 unsigned long pagebase;
5039 unsigned long pagediff;
5040 unsigned long pagenum = addr / pagesize;
5041
5042 SL_ENTER(_("sh_unix_lookup_page"));
5043#if 0
5044 fprintf(stderr, "mlock: --> base %ld, pagenum: %ld\n",
5045 addr, pagenum);
5046#endif
5047
5048 /* address of first page
5049 */
5050 pagebase = pagenum * pagesize;
5051
5052 /* number of pages
5053 */
5054 pagediff = (addr + len) - pagebase;
5055 pagenum = pagediff / pagesize;
5056 if (pagenum * pagesize < pagediff)
5057 ++pagenum;
5058
5059#if 0
5060 fprintf(stderr, "mlock: --> pagebase %ld, pagediff %ld, (addr + len) %ld\n",
5061 pagebase, pagediff, (addr + len));
5062#endif
5063
5064 *num_pages = pagenum;
5065 SL_RETURN((pagebase), _("sh_unix_lookup_page"));
5066}
5067
5068
5069#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5070
5071SH_MUTEX_STATIC(mutex_mlock,PTHREAD_MUTEX_INITIALIZER);
5072
5073int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
5074{
5075 int num_pages;
5076 int status = 0;
5077 int pagesize;
5078 sh_page_l * page_list;
5079 unsigned long addr;
5080#ifdef TEST_MLOCK
5081 int i = 0;
5082#endif
5083
5084 SL_ENTER(_("sh_unix_mlock"));
5085
5086 /* There's no cancellation point here, except if tracing is on
5087 */
5088 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5089
5090 page_list = sh_page_locked;
5091
5092 if (0 != page_locking)
5093 {
5094 status = -1;
5095 goto exit_mlock;
5096 }
5097
5098 page_locking = 1;
5099
5100 pagesize = sh_unix_pagesize();
5101 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
5102
5103#ifdef TEST_MLOCK
5104 fprintf(stderr, "mlock: addr %ld, base %ld, pages: %d, length %d\n",
5105 (unsigned long) in_addr, addr, num_pages, len);
5106#endif
5107
5108 /* increase refcount of locked pages
5109 * addr is first page; num_pages is #(consecutive pages) to lock
5110 */
5111
5112 while ((page_list != NULL) && (num_pages > 0))
5113 {
5114#ifdef TEST_MLOCK
5115 fprintf(stderr, "mlock: check page %d: %ld [%d]\n",
5116 i, page_list->page_start, page_list->page_refcount);
5117#endif
5118 if (page_list->page_start == addr)
5119 {
5120 page_list->page_refcount += 1;
5121 num_pages -= 1;
5122 addr += pagesize;
5123#ifdef TEST_MLOCK
5124 fprintf(stderr, "mlock: found page %d: %ld [%d], next page %ld\n",
5125 i, page_list->page_start, page_list->page_refcount, addr);
5126#endif
5127 }
5128#ifdef TEST_MLOCK
5129 ++i;
5130#endif
5131 page_list = page_list->next;
5132 }
5133
5134 /* mlock some more pages, if needed
5135 */
5136 while (num_pages > 0)
5137 {
5138#ifdef TEST_MLOCK
5139 fprintf(stderr, "mlock: lock page %d: mlock %ld [num_pages %d]\n",
5140 i, addr, num_pages);
5141 ++i;
5142#endif
5143 page_list = SH_ALLOC(sizeof(sh_page_l));
5144 page_list->page_start = addr;
5145 page_list->page_refcount = 1;
5146 sl_strlcpy(page_list->file, file, 64);
5147 page_list->line = line;
5148 status = mlock( (void *) addr, pagesize);
5149 if (status != 0)
5150 {
5151#ifdef TEST_MLOCK
5152 char errbuf[SH_ERRBUF_SIZE];
5153 fprintf(stderr, "mlock: error: %s\n",
5154 sh_error_message(errno, errbuf, sizeof(errbuf)));
5155#endif
5156 SH_FREE(page_list);
5157 page_locking = 0;
5158 goto exit_mlock;
5159 }
5160 page_list->next = sh_page_locked;
5161 sh_page_locked = page_list;
5162 num_pages -= 1;
5163 addr += pagesize;
5164 }
5165 page_locking = 0;
5166
5167 exit_mlock:
5168 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5169
5170 SL_RETURN((status), _("sh_unix_mlock"));
5171}
5172#else
5173int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
5174{
5175 (void) file; (void) line;
5176 (void) in_addr; (void) len;
5177 return -1;
5178}
5179#endif
5180
5181#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5182int sh_unix_munlock (void * in_addr, size_t len)
5183{
5184 int num_pages;
5185 int unlocked;
5186 int status;
5187 int pagesize;
5188 sh_page_l * page_list;
5189 sh_page_l * page_last;
5190 unsigned long addr;
5191
5192 int test_count;
5193 int test_status;
5194 int test_pages;
5195
5196#ifdef TEST_MLOCK
5197 int i = 0;
5198#endif
5199
5200 SL_ENTER(_("sh_unix_munlock"));
5201
5202 /* There's no cancellation point here, except if tracing is on
5203 */
5204 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5205
5206 unlocked = 0;
5207 status = 0;
5208 page_list = sh_page_locked;
5209
5210 if (0 != page_locking)
5211 {
5212 status = -1;
5213 goto exit_munlock;
5214 }
5215 page_locking = 1;
5216
5217 pagesize = sh_unix_pagesize();
5218 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
5219
5220#ifdef TEST_MLOCK
5221 fprintf(stderr, "munlock: in_addr %ld, addr %ld, pages: %d, length %d\n",
5222 (unsigned long) in_addr, addr, num_pages, len);
5223#endif
5224
5225 test_pages = num_pages;
5226
5227 /* reduce refcount of locked pages
5228 * addr is first page; num_pages is #(consecutive pages) to lock
5229 */
5230 while ((page_list != NULL) && (num_pages > 0))
5231 {
5232#ifdef TEST_MLOCK
5233 fprintf(stderr, "munlock: page %d: %ld [%d]\n",
5234 i, page_list->page_start, page_list->page_refcount);
5235#endif
5236
5237 test_status = 0;
5238 for (test_count = 0; test_count < test_pages; ++test_count)
5239 {
5240 if (page_list->page_start == (addr + (test_count * pagesize)))
5241 {
5242 test_status = 1;
5243 break;
5244 }
5245 }
5246
5247 if (test_status == 1)
5248 {
5249 page_list->page_refcount -= 1;
5250 if (page_list->page_refcount == 0)
5251 {
5252 status = munlock ( (void *) addr, pagesize);
5253 ++unlocked;
5254 }
5255 num_pages -= 1;
5256#ifdef TEST_MLOCK
5257 fprintf(stderr,
5258 "munlock: page %d: %ld [refcount %d], refcount reduced\n",
5259 i, page_list->page_start, page_list->page_refcount);
5260#endif
5261 }
5262#ifdef TEST_MLOCK
5263 ++i;
5264#endif
5265 page_list = page_list->next;
5266 }
5267
5268#ifdef TEST_MLOCK
5269 i = 0;
5270#endif
5271
5272 if (unlocked > 0)
5273 {
5274 page_list = sh_page_locked;
5275 page_last = sh_page_locked;
5276
5277 while ((page_list != NULL) && (unlocked > 0))
5278 {
5279 if (page_list->page_refcount == 0)
5280 {
5281#ifdef TEST_MLOCK
5282 fprintf(stderr, "munlock: remove page %d: %ld [refcount %d]\n",
5283 i, page_list->page_start, page_list->page_refcount);
5284#endif
5285 if (page_last != page_list)
5286 {
5287 page_last->next = page_list->next;
5288 SH_FREE(page_list);
5289 page_list = page_last->next;
5290 }
5291 else
5292 {
5293 page_last = page_list->next;
5294 if (page_list == sh_page_locked)
5295 sh_page_locked = page_list->next;
5296 SH_FREE(page_list);
5297 page_list = page_last;
5298 }
5299 --unlocked;
5300 }
5301 else
5302 {
5303#ifdef TEST_MLOCK
5304 fprintf(stderr, "munlock: skip page %d: %ld [refcount %d]\n",
5305 i, page_list->page_start, page_list->page_refcount);
5306#endif
5307
5308 page_last = page_list;
5309 page_list = page_list->next;
5310 }
5311#ifdef TEST_MLOCK
5312 ++i;
5313#endif
5314 }
5315 }
5316
5317 page_locking = 0;
5318
5319 exit_munlock:
5320 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5321 SL_RETURN((status), _("sh_unix_munlock"));
5322}
5323#else
5324int sh_unix_munlock (void * in_addr, size_t len)
5325{
5326 (void) in_addr; (void) len;
5327 return -1;
5328}
5329#endif
5330
5331int sh_unix_count_mlock()
5332{
5333 unsigned int i = 0;
5334 char str[32][64];
5335 sh_page_l * page_list;
5336
5337 SL_ENTER(_("sh_unix_count_mlock"));
5338
5339#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5340 /* There's no cancellation point here, except if tracing is on
5341 */
5342 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5343#endif
5344
5345 page_list = sh_page_locked;
5346
5347 while (page_list != NULL)
5348 {
5349#ifdef WITH_TPT
5350 if (i < 32)
5351 sl_snprintf(str[i], 64, _("file: %s line: %d page: %d"),
5352 page_list->file, page_list->line, i+1);
5353#endif
5354 page_list = page_list->next;
5355 ++i;
5356 }
5357
5358#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5359 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5360#endif
5361
5362#ifdef WITH_TPT
5363 {
5364 unsigned int j = 0;
5365 while (j < i && j < 32)
5366 {
5367 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, j, MSG_E_SUBGEN,
5368 str[j], _("sh_unix_count_mlock"));
5369 ++j;
5370 }
5371 }
5372#endif
5373
5374 sl_snprintf(str[0], 64, _("%d pages locked"), i);
5375 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, i, MSG_E_SUBGEN,
5376 str[0], _("sh_unix_count_mlock"));
5377 SL_RETURN((i), _("sh_unix_count_mlock"));
5378}
5379
5380/************************************************/
5381/************************************************/
5382/**** Stealth Utilities ****/
5383/************************************************/
5384/************************************************/
5385#ifdef SH_STEALTH
5386
5387void sh_unix_xor_code (char * str, int len)
5388{
5389 register int i;
5390
5391 for (i = 0; i < len; ++i) str[i] ^= (char) XOR_CODE;
5392 return;
5393}
5394
5395#if !defined(SH_STEALTH_MICRO)
5396
5397
5398int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
5399 unsigned long * bytes_read);
5400unsigned long first_hex_block(SL_TICKET fd, unsigned long * max);
5401
5402/*
5403 * --- Get hidden data from a block of hex data. ---
5404 */
5405int sh_unix_getline_stealth (SL_TICKET fd, char * str, int len)
5406{
5407 int add_off = 0, llen;
5408 static unsigned long off_data = 0;
5409 static unsigned long max_data = 0;
5410 static unsigned long bytes_read = 0;
5411 static int stealth_init = BAD;
5412
5413 SL_ENTER(_("sh_unix_getline_stealth"));
5414
5415 if (str == NULL)
5416 {
5417 off_data = 0;
5418 max_data = 0;
5419 bytes_read = 0;
5420 stealth_init = BAD;
5421 SL_RETURN(0, _("sh_unix_getline_stealth"));
5422 }
5423
5424 /* --- Initialize. ---
5425 */
5426 if (stealth_init == BAD)
5427 {
5428 off_data = first_hex_block(fd, &max_data);
5429 if (off_data == 0)
5430 {
5431 dlog(1, FIL__, __LINE__,
5432 _("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"));
5433 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
5434 _("Stealth config file."));
5435 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
5436 }
5437 stealth_init = GOOD;
5438 max_data += off_data;
5439 }
5440
5441 /* --- Seek to proper position. ---
5442 */
5443 if (bytes_read >= max_data || add_off < 0)
5444 {
5445 dlog(1, FIL__, __LINE__,
5446 _("The capacity of the container image file for the stealth config file seems to be too small. Your config file is likely truncated.\n"));
5447 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
5448 _("Stealth config file."));
5449 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
5450 }
5451 sl_seek(fd, off_data);
5452
5453 /* --- Read one line. ---
5454 */
5455 add_off = hideout_hex_block(fd, (unsigned char *) str, len, &bytes_read);
5456 off_data += add_off;
5457
5458 llen = sl_strlen(str);
5459 SL_RETURN(llen, _("sh_unix_getline_stealth"));
5460}
5461
5462int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
5463 unsigned long * bytes_read)
5464{
5465
5466 register int i, j, k;
5467 unsigned char c, e;
5468 register int num;
5469 unsigned char mask[9] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
5470 unsigned long here = 0;
5471 unsigned long retval = 0;
5472 unsigned long bread = 0;
5473
5474 SL_ENTER(_("hideout_hex_block"));
5475
5476 ASSERT_RET((len > 1), _("len > 1"), (0));
5477
5478 --len;
5479
5480 i = 0;
5481 while (i < len)
5482 {
5483 for (j = 0; j < 8; ++j)
5484 {
5485
5486 /* --- Get a low byte, modify, read back. ---
5487 */
5488 for (k = 0; k < 2; ++k)
5489 {
5490 /* -- Skip whitespace. ---
5491 */
5492 c = ' ';
5493 do {
5494 do {
5495 num = sl_read (fd, &c, 1);
5496 } while (num == 0 && errno == EINTR);
5497 if (num > 0)
5498 ++here;
5499 else if (num == 0)
5500 SL_RETURN((0), _("hideout_hex_block"));
5501 else
5502 SL_RETURN((-1), _("hideout_hex_block"));
5503 } while (c == '\n' || c == '\t' || c == '\r' ||
5504 c == ' ');
5505 }
5506
5507
5508 /* --- e is the value of the low byte. ---
5509 */
5510 e = (unsigned char) sh_util_hexchar( c );
5511 if ((e & mask[7]) != 0) /* bit is set */
5512 str[i] |= mask[j];
5513 else /* bit is not set */
5514 str[i] &= ~mask[j];
5515
5516 bread += 1;
5517 }
5518 if (str[i] == '\n') break;
5519 ++i;
5520 }
5521
5522 if (i != 0)
5523 str[i] = '\0';
5524 else
5525 str[i+1] = '\0'; /* keep newline and terminate */
5526 retval += here;
5527 *bytes_read += (bread/8);
5528
5529 SL_RETURN(retval, _("hideout_hex_block"));
5530}
5531
5532/* --- Get offset of first data block. ---
5533 */
5534unsigned long first_hex_block(SL_TICKET fd, unsigned long * max)
5535{
5536 unsigned int i;
5537 long num = 1;
5538 unsigned long lnum;
5539 char c;
5540 int nothex = 0;
5541 unsigned long retval = 0;
5542 unsigned int this_line = 0;
5543 char theline[SH_BUFSIZE];
5544
5545 SL_ENTER(_("first_hex_block"));
5546
5547 *max = 0;
5548
5549 while (1)
5550 {
5551 theline[0] = '\0';
5552 this_line = 0;
5553 c = '\0';
5554 while (c != '\n' && this_line < (sizeof(theline)-1))
5555 {
5556 do {
5557 num = sl_read (fd, &c, 1);
5558 } while (num == 0 && errno == EINTR);
5559 if (num > 0)
5560 theline[this_line] = c;
5561 else
5562 SL_RETURN((0), _("first_hex_block"));
5563 ++this_line;
5564 }
5565 theline[this_line] = '\0';
5566
5567 /* not only 'newline' */
5568 if (this_line > 60)
5569 {
5570 nothex = 0;
5571 i = 0;
5572 while (nothex == 0 && i < (this_line-1))
5573 {
5574 if (! isxdigit((int)theline[i])) nothex = 1;
5575 ++i;
5576 }
5577 if (nothex == 1) retval += this_line;
5578 }
5579 else
5580 {
5581 nothex = 1;
5582 retval += this_line;
5583 }
5584
5585 if (nothex == 0)
5586 {
5587 *max = 0;
5588 do {
5589 do {
5590 num = sl_read (fd, theline, SH_BUFSIZE);
5591 } while (num == 0 && errno == EINTR);
5592 if (num > 0)
5593 {
5594 lnum = (unsigned long) num;
5595 for (i = 0; i < lnum; ++i)
5596 {
5597 c = theline[i];
5598 if (c == '\n' || c == '\t' || c == '\r' || c == ' ')
5599 ;
5600 else if (!isxdigit((int)c))
5601 break;
5602 else
5603 *max += 1;
5604 }
5605 }
5606 } while (num > 0);
5607
5608 *max /= 16;
5609 SL_RETURN((retval), _("first_hex_block"));
5610 }
5611
5612 }
5613 /* SL_RETURN((0), _("first_hex_block")); *//* unreachable */
5614}
5615
5616 /* if !defined(SH_STEALTH_MICRO) */
5617#endif
5618
5619 /* ifdef SH_STEALTH */
5620#endif
5621
5622/*
5623 * anti-debugger code
5624 */
5625#if defined(SCREW_IT_UP)
5626
5627#if defined(HAVE_PTHREAD)
5628
5629static pthread_key_t gSigtrapVariables_key;
5630static pthread_once_t gSigtrapVariables_key_once = PTHREAD_ONCE_INIT;
5631
5632static inline void make_gSigtrapVariables_key()
5633{
5634 (void) pthread_key_create(&gSigtrapVariables_key, free);
5635}
5636
5637struct sh_sigtrap_variables * sh_sigtrap_variables_get()
5638{
5639 void * ptr;
5640
5641 (void) pthread_once(&gSigtrapVariables_key_once, make_gSigtrapVariables_key);
5642
5643 ptr = pthread_getspecific(gSigtrapVariables_key);
5644 if (ptr == NULL) {
5645 ptr = calloc(1,sizeof(struct sh_sigtrap_variables));
5646 if (ptr == NULL) {
5647 return NULL;
5648 }
5649 (void) pthread_setspecific(gSigtrapVariables_key, ptr);
5650 }
5651
5652 return (struct sh_sigtrap_variables *) ptr;
5653}
5654
5655/* !defined(HAVE_PTHREAD) */
5656#else
5657
5658static struct sh_sigtrap_variables global_sigtrap_variables;
5659struct sh_sigtrap_variables * sh_sigtrap_variables_get()
5660{
5661 return &global_sigtrap_variables;
5662}
5663
5664#endif
5665
5666int sh_sigtrap_max_duration_set (const char * str)
5667{
5668 /* For security (prevent reloading with larger value)
5669 * this value can only be set once.
5670 */
5671 static int once = 0;
5672 int i;
5673
5674 SL_ENTER(_("sh_sigtrap_max_duration_set"));
5675
5676 i = atoi (str);
5677
5678 if (i >= 0 && once == 0)
5679 {
5680 sh.sigtrap_max_duration = i;
5681 once = 1;
5682 }
5683 else
5684 {
5685 SL_RETURN ((-1), _("sh_sigtrap_max_duration_set"));
5686 }
5687 SL_RETURN( (0), _("sh_sigtrap_max_duration_set"));
5688}
5689
5690void sh_sigtrap_handler (int signum)
5691{
5692 struct sh_sigtrap_variables * sigtrap_variables;
5693 sigtrap_variables = sh_sigtrap_variables_get();
5694 if (sigtrap_variables == NULL) {
5695 /* Perhaps, it's better to not die, and to continue using Samhain,
5696 even if this part does not work. */
5697 return;
5698 }
5699
5700#ifdef HAVE_GETTIMEOFDAY
5701 {
5702 struct timeval tv;
5703 long difftv;
5704
5705 gettimeofday(&tv, NULL);
5706 difftv = (tv.tv_sec - sigtrap_variables->save_tv.tv_sec) * 1000000 +
5707 (tv.tv_usec - sigtrap_variables->save_tv.tv_usec);
5708 if (difftv > sh.sigtrap_max_duration)
5709 raise(SIGKILL);
5710 }
5711#endif
5712
5713 sigtrap_variables->not_traced = signum;
5714 /* cppcheck-suppress memleak */
5715 return;
5716}
5717#endif
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