source: trunk/src/sh_unix.c@ 565

Last change on this file since 565 was 550, checked in by katerina, 5 years ago

Fix for ticket #442 (support for OpenBSD signify).
File size: 133.5 KB
Line 
1/* SAMHAIN file system integrity testing */
2/* Copyright (C) 1999 Rainer Wichmann */
3/* */
4/* This program is free software; you can redistribute it */
5/* and/or modify */
6/* it under the terms of the GNU General Public License as */
7/* published by */
8/* the Free Software Foundation; either version 2 of the License, or */
9/* (at your option) any later version. */
10/* */
11/* This program is distributed in the hope that it will be useful, */
12/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
13/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
14/* GNU General Public License for more details. */
15/* */
16/* You should have received a copy of the GNU General Public License */
17/* along with this program; if not, write to the Free Software */
18/* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20#include "config_xor.h"
21
22
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26#include <ctype.h>
27#ifdef HAVE_LINUX_FS_H
28#include <linux/fs.h>
29#endif
30
31#ifdef HAVE_MEMORY_H
32#include <memory.h>
33#endif
34
35#ifdef HAVE_UNISTD_H
36#include <errno.h>
37#include <signal.h>
38#include <pwd.h>
39#include <grp.h>
40#include <sys/types.h>
41#include <sys/stat.h>
42#include <sys/resource.h>
43#include <fcntl.h>
44#include <unistd.h>
45/* need to undef these, since the #define's may be picked up from
46 * linux/wait.h, and will clash with a typedef in sys/wait.h
47 */
48#undef P_ALL
49#undef P_PID
50#undef P_PGID
51#include <sys/wait.h>
52
53/*********************
54#ifdef HAVE_SYS_VFS_H
55#include <sys/vfs.h>
56#endif
57**********************/
58#endif
59
60#if TIME_WITH_SYS_TIME
61#include <sys/time.h>
62#include <time.h>
63#else
64#if HAVE_SYS_TIME_H
65#include <sys/time.h>
66#else
67#include <time.h>
68#endif
69#endif
70
71#ifdef HAVE_SYS_SELECT_H
72#include <sys/select.h>
73#endif
74
75#ifndef FD_SET
76#define NFDBITS 32
77#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
78#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
79#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
80#endif /* !FD_SET */
81#ifndef FD_SETSIZE
82#define FD_SETSIZE 32
83#endif
84#ifndef FD_ZERO
85#define FD_ZERO(p) memset((char *)(p), 0, sizeof(*(p)))
86#endif
87
88
89#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
90#include <sys/mman.h>
91#endif
92
93#include "samhain.h"
94#include "sh_error.h"
95#include "sh_unix.h"
96#include "sh_utils.h"
97#include "sh_mem.h"
98#include "sh_hash.h"
99#include "sh_tools.h"
100#include "sh_restrict.h"
101#include "sh_ipvx.h"
102#include "sh_tiger.h"
103#include "sh_prelink.h"
104#include "sh_pthread.h"
105#include "sh_sem.h"
106
107/* moved here from far below
108 */
109#include <netdb.h>
110
111#define SH_NEED_PWD_GRP
112#define SH_NEED_GETHOSTBYXXX
113#include "sh_static.h"
114
115#ifndef HAVE_LSTAT
116#define lstat stat
117#endif
118
119#if defined(S_IFLNK) && !defined(S_ISLNK)
120#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
121#else
122#if !defined(S_ISLNK)
123#define S_ISLNK(mode) (0)
124#endif
125#endif
126
127#if defined(S_IFSOCK) && !defined(S_ISSOCK)
128#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
129#else
130#if !defined(S_ISSOCK)
131#define S_ISSOCK(mode) (0)
132#endif
133#endif
134
135#if defined(S_IFDOOR) && !defined(S_ISDOOR)
136#define S_ISDOOR(mode) (((mode) & S_IFMT) == S_IFDOOR)
137#else
138#if !defined(S_ISDOOR)
139#define S_ISDOOR(mode) (0)
140#endif
141#endif
142
143#if defined(S_IFPORT) && !defined(S_ISPORT)
144#define S_ISPORT(mode) (((mode) & S_IFMT) == S_IFPORT)
145#else
146#if !defined(S_ISPORT)
147#define S_ISPORT(mode) (0)
148#endif
149#endif
150
151#define SH_KEY_NULL _("000000000000000000000000000000000000000000000000")
152
153#undef FIL__
154#define FIL__ _("sh_unix.c")
155
156unsigned long mask_PRELINK = MASK_PRELINK_;
157unsigned long mask_USER0 = MASK_USER_;
158unsigned long mask_USER1 = MASK_USER_;
159unsigned long mask_USER2 = MASK_USER_;
160unsigned long mask_USER3 = MASK_USER_;
161unsigned long mask_USER4 = MASK_USER_;
162unsigned long mask_ALLIGNORE = MASK_ALLIGNORE_;
163unsigned long mask_ATTRIBUTES = MASK_ATTRIBUTES_;
164unsigned long mask_LOGFILES = MASK_LOGFILES_;
165unsigned long mask_LOGGROW = MASK_LOGGROW_;
166unsigned long mask_READONLY = MASK_READONLY_;
167unsigned long mask_NOIGNORE = MASK_NOIGNORE_;
168
169
170extern char **environ;
171
172int sh_unix_maskreset()
173{
174 mask_PRELINK = MASK_PRELINK_;
175 mask_USER0 = MASK_USER_;
176 mask_USER1 = MASK_USER_;
177 mask_USER2 = MASK_USER_;
178 mask_USER3 = MASK_USER_;
179 mask_USER4 = MASK_USER_;
180 mask_ALLIGNORE = MASK_ALLIGNORE_;
181 mask_ATTRIBUTES = MASK_ATTRIBUTES_;
182 mask_LOGFILES = MASK_LOGFILES_;
183 mask_LOGGROW = MASK_LOGGROW_;
184 mask_READONLY = MASK_READONLY_;
185 mask_NOIGNORE = MASK_NOIGNORE_;
186 return 0;
187}
188
189
190#ifdef SYS_SIGLIST_DECLARED
191/* extern const char * const sys_siglist[]; */
192#else
193char * sh_unix_siglist (int signum)
194{
195 switch (signum)
196 {
197#ifdef SIGHUP
198 case SIGHUP:
199 return _("Hangup");
200#endif
201#ifdef SIGINT
202 case SIGINT:
203 return _("Interrupt");
204#endif
205#ifdef SIGQUIT
206 case SIGQUIT:
207 return _("Quit");
208#endif
209#ifdef SIGILL
210 case SIGILL:
211 return _("Illegal instruction");
212#endif
213#ifdef SIGTRAP
214 case SIGTRAP:
215 return _("Trace/breakpoint trap");
216#endif
217#ifdef SIGABRT
218 case SIGABRT:
219 return _("IOT trap/Abort");
220#endif
221#ifdef SIGBUS
222 case SIGBUS:
223 return _("Bus error");
224#endif
225#ifdef SIGFPE
226 case SIGFPE:
227 return _("Floating point exception");
228#endif
229#ifdef SIGUSR1
230 case SIGUSR1:
231 return _("User defined signal 1");
232#endif
233#ifdef SIGSEGV
234 case SIGSEGV:
235 return _("Segmentation fault");
236#endif
237#ifdef SIGUSR2
238 case SIGUSR2:
239 return _("User defined signal 2");
240#endif
241#ifdef SIGPIPE
242 case SIGPIPE:
243 return _("Broken pipe");
244#endif
245#ifdef SIGALRM
246 case SIGALRM:
247 return _("Alarm clock");
248#endif
249#ifdef SIGTERM
250 case SIGTERM:
251 return _("Terminated");
252#endif
253#ifdef SIGSTKFLT
254 case SIGSTKFLT:
255 return _("Stack fault");
256#endif
257#ifdef SIGCHLD
258 case SIGCHLD:
259 return _("Child exited");
260#endif
261#ifdef SIGCONT
262 case SIGCONT:
263 return _("Continued");
264#endif
265#ifdef SIGSTOP
266 case SIGSTOP:
267 return _("Stopped");
268#endif
269#ifdef SIGTSTP
270 case SIGTSTP:
271 return _("Stop typed at tty");
272#endif
273#ifdef SIGTTIN
274 case SIGTTIN:
275 return _("Stopped (tty input)");
276#endif
277#ifdef SIGTTOU
278 case SIGTTOU:
279 return _("Stopped (tty output)");
280#endif
281#ifdef SIGURG
282 case SIGURG:
283 return _("Urgent condition");
284#endif
285#ifdef SIGXCPU
286 case SIGXCPU:
287 return _("CPU time limit exceeded");
288#endif
289#ifdef SIGXFSZ
290 case SIGXFSZ:
291 return _("File size limit exceeded");
292#endif
293#ifdef SIGVTALRM
294 case SIGVTALRM:
295 return _("Virtual time alarm");
296#endif
297#ifdef SIGPROF
298 case SIGPROF:
299 return _("Profile signal");
300#endif
301#ifdef SIGWINCH
302 case SIGWINCH:
303 return _("Window size changed");
304#endif
305#ifdef SIGIO
306 case SIGIO:
307 return _("Possible I/O");
308#endif
309#ifdef SIGPWR
310 case SIGPWR:
311 return _("Power failure");
312#endif
313#ifdef SIGUNUSED
314 case SIGUNUSED:
315 return _("Unused signal");
316#endif
317 }
318 return _("Unknown");
319}
320#endif
321
322
323/* Log from within a signal handler without using any
324 * functions that are not async signal safe.
325 *
326 * This is the safe_itoa helper function.
327 */
328char * safe_itoa(int i, char * str, int size)
329{
330 unsigned int u;
331 int iisneg = 0;
332 char *p = &str[size-1];
333
334 *p = '\0';
335 if (i < 0) {
336 iisneg = 1;
337 u = ((unsigned int)(-(1+i))) + 1;
338 } else {
339 u = i;
340 }
341 do {
342 --p;
343 *p = '0' + (u % 10);
344 u /= 10;
345 } while (u && (p != str));
346 if ((iisneg == 1) && (p != str)) {
347 --p;
348 *p = '-';
349 }
350 return p;
351}
352
353/* Log from within a signal handler without using any
354 * functions that are not async signal safe.
355 *
356 * This is the safe_logger function.
357 * Arguments: signal (signal number), method (0=logger, 1=stderr), thepid (pid)
358 */
359extern int OnlyStderr;
360
361int safe_logger (int thesignal, int method, char * details)
362{
363 unsigned int i = 0;
364 int status = -1;
365 struct stat buf;
366 pid_t newpid;
367 char str[128];
368 char * p;
369
370 char l0[64], l1[64], l2[64], l3[64];
371 char a0[32];
372 char e0[128];
373 char msg[128];
374
375 char * locations[] = { NULL, NULL, NULL, NULL, NULL };
376 char * envp[] = { NULL, NULL };
377 char * argp[] = { NULL, NULL, NULL };
378
379 pid_t thepid = getpid();
380
381 if ((sh.flag.isdaemon == S_FALSE) || (OnlyStderr == S_TRUE))
382 method = 1;
383
384 /* seems that solaris cc needs this way of initializing ...
385 */
386 locations[0] = l0;
387 locations[1] = l1;
388 locations[2] = l2;
389 locations[3] = l3;
390
391 envp[0] = e0;
392 argp[0] = a0;
393
394 sl_strlcpy(msg, _("samhain["), 128);
395 p = safe_itoa((int) thepid, str, 128);
396 if (p && *p)
397 sl_strlcat(msg, p, 128);
398 if (thesignal == 0)
399 {
400 if (details == NULL) {
401 sl_strlcat(msg, _("]: out of memory"), 128);
402 } else {
403 sl_strlcat(msg, _("]: "), 128);
404 sl_strlcat(msg, details, 128);
405 }
406 }
407 else
408 {
409 sl_strlcat(msg, _("]: exit on signal "), 128);
410 p = safe_itoa(thesignal, str, 128);
411 if (p && *p)
412 sl_strlcat(msg, p, 128);
413 }
414
415 if (method == 1) {
416#ifndef STDERR_FILENO
417#define STDERR_FILENO 2
418#endif
419 int retval = 0;
420 do {
421 retval = write(STDERR_FILENO, msg, strlen(msg));
422 } while (retval < 0 && errno == EINTR);
423 do {
424 retval = write(STDERR_FILENO, "\n", 1);
425 } while (retval < 0 && errno == EINTR);
426 return 0;
427 }
428
429 sl_strlcpy (l0, _("/usr/bin/logger"), 64);
430 sl_strlcpy (l1, _("/usr/sbin/logger"), 64);
431 sl_strlcpy (l2, _("/usr/ucb/logger"), 64);
432 sl_strlcpy (l3, _("/bin/logger"), 64);
433
434 sl_strlcpy (a0, _("logger"), 32);
435 sl_strlcpy (e0,
436 _("PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/ucb:/usr/local/bin"),
437 128);
438
439 while (locations[i] != NULL) {
440 status = stat(locations[i], &buf);
441 if (status == 0)
442 break;
443 ++i;
444 }
445
446 if (locations[i] != NULL) {
447 argp[1] = msg;
448 newpid = fork();
449 if (newpid == 0) {
450 execve(locations[i], argp, envp);
451 _exit(1);
452 }
453 else if (newpid > 0) {
454 waitpid(newpid, &status, WUNTRACED);
455 }
456 }
457 return 0;
458}
459
460void safe_fatal (const char * details,
461 const char * file, int line)
462{
463 char msg[128];
464 char str[128];
465 char * p;
466 int thesignal = 0;
467 int method = 0;
468
469 p = safe_itoa((int) line, str, 128);
470 sl_strlcpy(msg, _("FATAL: "), 128);
471 sl_strlcat(msg, file, 128);
472 sl_strlcat(msg, ": ", 128);
473 if (p && (*p)) {
474 sl_strlcat(msg, p , 128);
475 sl_strlcat(msg, ": ", 128);
476 }
477 sl_strlcat(msg, details, 128);
478 (void) safe_logger (thesignal, method, msg);
479
480 close_ipc ();
481 raise(SIGKILL);
482}
483
484extern char sh_sig_msg[64];
485
486volatile int immediate_exit_normal = 0;
487
488#if defined(SA_SIGACTION_WORKS)
489static
490void sh_unix_sigexit (int mysignal, siginfo_t * signal_info, void * signal_add)
491#else
492static
493void sh_unix_sigexit (int mysignal)
494#endif
495{
496
497#if defined(SA_SIGACTION_WORKS)
498 if (signal_info != NULL && signal_info->si_code == SI_USER &&
499 mysignal != SIGTERM && mysignal != SIGINT)
500 {
501 return;
502 }
503
504 /* avoid compiler warning (unused var)
505 */
506 (void) signal_add;
507#endif
508
509 /*
510 * Block re-entry
511 */
512 if (immediate_exit_normal > 0)
513 {
514 ++immediate_exit_normal;
515 if ((skey != NULL) && (immediate_exit_normal == 2))
516 memset (skey, 0, sizeof(sh_key_t));
517 if (immediate_exit_normal == 2)
518 {
519 int val_return;
520
521 do {
522 val_return = chdir ("/");
523 } while (val_return < 0 && errno == EINTR);
524
525 close_ipc ();
526 safe_logger (mysignal, 0, NULL);
527 }
528 raise(SIGKILL);
529 }
530 else
531 {
532 immediate_exit_normal = 1;
533 }
534
535#ifdef SYS_SIGLIST_DECLARED
536 strncpy (sh_sig_msg, sys_siglist[mysignal], 40);
537#else
538 strncpy (sh_sig_msg, sh_unix_siglist(mysignal), 40);
539#endif
540 sh_sig_msg[63] = '\0';
541
542 ++sig_raised;
543 ++sig_urgent;
544 sig_termfast = 1;
545 return;
546}
547
548volatile int immediate_exit_fast = 0;
549
550#if defined(SA_SIGACTION_WORKS)
551static
552void sh_unix_sigexit_fast (int mysignal, siginfo_t * signal_info,
553 void * signal_add)
554#else
555static
556void sh_unix_sigexit_fast (int mysignal)
557#endif
558{
559#if defined(SL_DEBUG) && (defined(USE_SYSTEM_MALLOC) || !defined(USE_MALLOC_LOCK))
560 int retval;
561#endif
562
563#if defined(SA_SIGACTION_WORKS)
564 if (signal_info != NULL && signal_info->si_code == SI_USER)
565 {
566 return;
567 }
568#endif
569
570 /* avoid compiler warning (unused var)
571 */
572#if defined(SA_SIGACTION_WORKS)
573 (void) signal_add;
574#endif
575
576 /* Check whether the heap is ok; otherwise _exit
577 */
578#if !defined(SL_DEBUG) || (!defined(USE_SYSTEM_MALLOC) && defined(USE_MALLOC_LOCK))
579 ++immediate_exit_fast;
580 if (skey != NULL && immediate_exit_fast < 2)
581 memset (skey, 0, sizeof(sh_key_t));
582 if (immediate_exit_fast < 2)
583 safe_logger (mysignal, 0, NULL);
584 raise(SIGKILL);
585#else
586
587 /* debug code
588 */
589 if (immediate_exit_fast == 1)
590 {
591 ++immediate_exit_fast;
592 if (skey != NULL)
593 memset (skey, 0, sizeof(sh_key_t));
594 close_ipc ();
595 safe_logger (mysignal, 0, NULL);
596 do {
597 retval = chdir ("/");
598 } while (retval < 0 && errno == EINTR);
599 raise(SIGFPE);
600 }
601 else if (immediate_exit_fast == 2)
602 {
603 do {
604 retval = chdir ("/");
605 } while (retval < 0 && errno == EINTR);
606 raise(SIGFPE);
607 }
608 else if (immediate_exit_fast != 0)
609 {
610 raise(SIGKILL);
611 }
612
613 ++immediate_exit_fast;
614
615 /* The FPE|BUS|SEGV|ILL signals leave the system in an undefined
616 * state, thus it is best to exit immediately.
617 */
618#ifdef SYS_SIGLIST_DECLARED
619 strncpy (sh_sig_msg, sys_siglist[mysignal], 40);
620#else
621 strncpy (sh_sig_msg, sh_unix_siglist(mysignal), 40);
622#endif
623 sh_sig_msg[63] = '\0';
624
625 sl_stack_print();
626
627 /* Try to push out an error message.
628 */
629 sh_error_handle ((-1), FIL__, __LINE__, mysignal, MSG_EXIT_NORMAL,
630 sh.prg_name, sh_sig_msg);
631
632 if (skey != NULL)
633 memset (skey, 0, sizeof(sh_key_t));
634 close_ipc ();
635
636 do {
637 retval = chdir ("/");
638 } while (retval < 0 && errno == EINTR);
639
640 raise(SIGFPE);
641#endif
642}
643
644
645static
646void sh_unix_sigaction (int mysignal)
647{
648 ++sig_raised;
649#ifdef SIGUSR1
650 if (mysignal == SIGUSR1)
651 sig_debug_switch = 1;
652#endif
653#ifdef SIGUSR2
654 if (mysignal == SIGUSR2)
655 {
656 ++sig_suspend_switch;
657 ++sig_urgent;
658 }
659#endif
660#ifdef SIGHUP
661 if (mysignal == SIGHUP)
662 sig_config_read_again = 1;
663#endif
664#ifdef SIGTTOU
665 if (mysignal == SIGTTOU) {
666 sig_force_check = 1; sh_sem_trylock(); }
667#endif
668#ifdef SIGTSTP
669 if (mysignal == SIGTSTP) {
670 sig_force_check = 1; sig_force_silent = 1; sh_sem_trylock(); }
671#endif
672#ifdef SIGTTIN
673 if (mysignal == SIGTTIN)
674 sig_fresh_trail = 1;
675#endif
676#ifdef SIGABRT
677 if (mysignal == SIGABRT)
678 sig_fresh_trail = 1;
679#endif
680#ifdef SIGQUIT
681 if (mysignal == SIGQUIT)
682 sig_terminate = 1;
683#endif
684#ifdef SIGTERM
685 if (mysignal == SIGTERM)
686 {
687 strncpy (sh_sig_msg, _("Terminated"), 40);
688 sig_termfast = 1;
689 ++sig_urgent;
690 }
691#endif
692
693 return;
694}
695
696void sh_unix_ign_sigpipe()
697{
698 struct sigaction ignact;
699
700 ignact.sa_handler = SIG_IGN; /* signal action */
701 sigemptyset( &ignact.sa_mask ); /* set an empty mask */
702 ignact.sa_flags = 0; /* init sa_flags */
703
704#ifdef SIGPIPE
705 retry_sigaction(FIL__, __LINE__, SIGPIPE, &ignact, NULL);
706#endif
707
708 return;
709}
710static
711void sh_unix_siginstall (int goDaemon)
712{
713 struct sigaction act, act_fast, act2, oldact, ignact;
714#if defined (SH_WITH_SERVER)
715 (void) goDaemon;
716#endif
717
718 SL_ENTER(_("sh_unix_siginstall"));
719
720 ignact.sa_handler = SIG_IGN; /* signal action */
721 sigemptyset( &ignact.sa_mask ); /* set an empty mask */
722 ignact.sa_flags = 0; /* init sa_flags */
723
724#if defined(SA_SIGACTION_WORKS)
725 act.sa_sigaction = &sh_unix_sigexit; /* signal action */
726#else
727 act.sa_handler = &sh_unix_sigexit; /* signal action */
728#endif
729
730 sigfillset ( &act.sa_mask ); /* set a full mask */
731
732
733 /* Block all but deadly signals.
734 */
735#ifdef SIGILL
736 sigdelset ( &act.sa_mask, SIGILL );
737#endif
738#ifndef SL_DEBUG
739#ifdef SIGFPE
740 sigdelset ( &act.sa_mask, SIGFPE );
741#endif
742#endif
743#ifdef SIGSEGV
744 sigdelset ( &act.sa_mask, SIGSEGV );
745#endif
746#ifdef SIGBUS
747 sigdelset ( &act.sa_mask, SIGBUS );
748#endif
749
750#if defined(SA_SIGACTION_WORKS)
751 act_fast.sa_sigaction = &sh_unix_sigexit_fast; /* signal action */
752#else
753 act_fast.sa_handler = &sh_unix_sigexit_fast; /* signal action */
754#endif
755
756 sigfillset ( &act_fast.sa_mask ); /* set a full mask */
757
758#ifdef SIGILL
759 sigdelset ( &act_fast.sa_mask, SIGILL );
760#endif
761#ifndef SL_DEBUG
762#ifdef SIGFPE
763 sigdelset ( &act_fast.sa_mask, SIGFPE );
764#endif
765#endif
766#ifdef SIGSEGV
767 sigdelset ( &act_fast.sa_mask, SIGSEGV );
768#endif
769#ifdef SIGBUS
770 sigdelset ( &act_fast.sa_mask, SIGBUS );
771#endif
772
773
774 /* Use siginfo to verify origin of signal, if possible.
775 */
776#if defined(SA_SIGACTION_WORKS)
777 act.sa_flags = SA_SIGINFO;
778 act_fast.sa_flags = SA_SIGINFO;
779#else
780 act.sa_flags = 0;
781 act_fast.sa_flags = 0;
782#endif
783
784 /* Do not block the signal from being received in its handler ...
785 * (is this a good or a bad idea ??).
786 */
787#if defined(SA_NOMASK)
788 act_fast.sa_flags |= SA_NOMASK;
789#elif defined(SA_NODEFER)
790 act_fast.sa_flags |= SA_NODEFER;
791#endif
792
793
794 act2.sa_handler = &sh_unix_sigaction; /* signal action */
795 sigemptyset( &act2.sa_mask ); /* set an empty mask */
796 act2.sa_flags = 0; /* init sa_flags */
797
798 /* signals to control the daemon */
799
800#ifdef SIGHUP
801 retry_sigaction(FIL__, __LINE__, SIGHUP, &act2, &oldact);
802#endif
803#ifdef SIGABRT
804 retry_sigaction(FIL__, __LINE__, SIGABRT, &act2, &oldact);
805#endif
806#ifdef SIGUSR1
807 retry_sigaction(FIL__, __LINE__, SIGUSR1, &act2, &oldact);
808#endif
809#ifdef SIGUSR2
810 retry_sigaction(FIL__, __LINE__, SIGUSR2, &act2, &oldact);
811#endif
812#ifdef SIGQUIT
813 retry_sigaction(FIL__, __LINE__, SIGQUIT, &act2, &oldact);
814#endif
815#ifdef SIGTERM
816 retry_sigaction(FIL__, __LINE__, SIGTERM, &act, &oldact);
817#endif
818
819 /* fatal signals that may cause termination */
820
821#ifdef SIGILL
822 retry_sigaction(FIL__, __LINE__, SIGILL, &act_fast, &oldact);
823#endif
824#ifndef SL_DEBUG
825#ifdef SIGFPE
826 retry_sigaction(FIL__, __LINE__, SIGFPE, &act_fast, &oldact);
827#endif
828#endif
829#ifdef SIGSEGV
830 retry_sigaction(FIL__, __LINE__, SIGSEGV, &act_fast, &oldact);
831#endif
832#ifdef SIGBUS
833 retry_sigaction(FIL__, __LINE__, SIGBUS, &act_fast, &oldact);
834#endif
835
836 /* other signals */
837
838#ifdef SIGINT
839 retry_sigaction(FIL__, __LINE__, SIGINT, &act, &oldact);
840#endif
841#ifdef SIGPIPE
842 retry_sigaction(FIL__, __LINE__, SIGPIPE, &ignact, &oldact);
843#endif
844#ifdef SIGALRM
845 retry_sigaction(FIL__, __LINE__, SIGALRM, &ignact, &oldact);
846#endif
847
848#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
849#ifdef SIGTTOU
850 if (goDaemon == 1)
851 retry_sigaction(FIL__, __LINE__, SIGTTOU, &act2, &oldact);
852 else
853 retry_sigaction(FIL__, __LINE__, SIGTTOU, &ignact, &oldact);
854#endif
855#ifdef SIGTSTP
856 if (goDaemon == 1)
857 retry_sigaction(FIL__, __LINE__, SIGTSTP, &act2, &oldact);
858 else
859 retry_sigaction(FIL__, __LINE__, SIGTSTP, &ignact, &oldact);
860#endif
861#ifdef SIGTTIN
862 if (goDaemon == 1)
863 retry_sigaction(FIL__, __LINE__, SIGTTIN, &act2, &oldact);
864 else
865 retry_sigaction(FIL__, __LINE__, SIGTTIN, &ignact, &oldact);
866#endif
867#else
868#ifdef SIGTSTP
869 retry_sigaction(FIL__, __LINE__, SIGTSTP, &ignact, &oldact);
870#endif
871#ifdef SIGTTOU
872 retry_sigaction(FIL__, __LINE__, SIGTTOU, &ignact, &oldact);
873#endif
874#ifdef SIGTTIN
875 retry_sigaction(FIL__, __LINE__, SIGTTIN, &ignact, &oldact);
876#endif
877#endif
878
879#ifdef SIGTRAP
880#if !defined(SCREW_IT_UP)
881 retry_sigaction(FIL__, __LINE__, SIGTRAP, &act, &oldact);
882#endif
883#endif
884
885#ifdef SIGPOLL
886 retry_sigaction(FIL__, __LINE__, SIGPOLL, &ignact, &oldact);
887#endif
888#if defined(SIGPROF) && !defined(SH_PROFILE)
889 retry_sigaction(FIL__, __LINE__, SIGPROF, &ignact, &oldact);
890#endif
891#ifdef SIGSYS
892 retry_sigaction(FIL__, __LINE__, SIGSYS, &act, &oldact);
893#endif
894#ifdef SIGURG
895 retry_sigaction(FIL__, __LINE__, SIGURG, &ignact, &oldact);
896#endif
897#if defined(SIGVTALRM) && !defined(SH_PROFILE)
898 retry_sigaction(FIL__, __LINE__, SIGVTALRM, &ignact, &oldact);
899#endif
900#ifdef SIGXCPU
901 retry_sigaction(FIL__, __LINE__, SIGXCPU, &act, &oldact);
902#endif
903#ifdef SIGXFSZ
904 retry_sigaction(FIL__, __LINE__, SIGXFSZ, &act, &oldact);
905#endif
906
907#ifdef SIGEMT
908 retry_sigaction(FIL__, __LINE__, SIGEMT, &ignact, &oldact);
909#endif
910#ifdef SIGSTKFLT
911 retry_sigaction(FIL__, __LINE__, SIGSTKFLT, &act, &oldact);
912#endif
913#ifdef SIGIO
914 retry_sigaction(FIL__, __LINE__, SIGIO, &ignact, &oldact);
915#endif
916#ifdef SIGPWR
917 retry_sigaction(FIL__, __LINE__, SIGPWR, &act, &oldact);
918#endif
919
920#ifdef SIGLOST
921 retry_sigaction(FIL__, __LINE__, SIGLOST, &ignact, &oldact);
922#endif
923#ifdef SIGUNUSED
924 retry_sigaction(FIL__, __LINE__, SIGUNUSED, &ignact, &oldact);
925#endif
926
927 SL_RET0(_("sh_unix_siginstall"));
928}
929
930/* ---------------------------------------------------------------- */
931
932/* checksum the own binary
933 */
934int sh_unix_self_hash (const char * c)
935{
936 char message[512];
937 char hashbuf[KEYBUF_SIZE];
938
939 SL_ENTER(_("sh_unix_self_hash"));
940
941 if (c == NULL)
942 {
943 sh.exec.path[0] = '\0';
944 SL_RETURN((0), _("sh_unix_self_hash"));
945 }
946 sl_strlcpy(sh.exec.path, c, SH_PATHBUF);
947
948 sl_strlcpy(sh.exec.hash,
949 sh_tiger_hash (c, TIGER_FILE, TIGER_NOLIM, hashbuf, sizeof(hashbuf)),
950 KEY_LEN+1);
951 sl_snprintf(message, 512, _("%s has checksum: %s"),
952 sh.exec.path, sh.exec.hash);
953 message[511] = '\0';
954 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
955 message, _("sh_unix_self_hash"));
956 if (0 == sl_strcmp(sh.exec.hash, SH_KEY_NULL ))
957 {
958 dlog(1, FIL__, __LINE__,
959 _("Could not checksum my own executable because of the\nfollowing error: %s: %s\n\nPossible reasons include:\n Wrong path in configure file option SamhainPath=/path/to/executable\n No read permission for the effective UID: %d\n"),
960 sh.exec.path, sl_get_errmsg(), (int) sl_ret_euid());
961 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_NOACCESS,
962 (long) sh.real.uid, c);
963 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
964 }
965 SL_RETURN((0), _("sh_unix_self_hash"));
966}
967
968int sh_unix_self_check ()
969{
970 char newhash[KEY_LEN+1];
971 char message[512];
972 char hashbuf[KEYBUF_SIZE];
973
974 SL_ENTER(_("sh_unix_self_check"));
975 if (sh.exec.path[0] == '\0')
976 SL_RETURN((0), _("sh_unix_self_check"));
977
978 sl_strlcpy(newhash,
979 sh_tiger_hash (sh.exec.path, TIGER_FILE, TIGER_NOLIM, hashbuf, sizeof(hashbuf)),
980 KEY_LEN+1);
981 if (0 == sl_strncmp(sh.exec.hash, newhash, KEY_LEN))
982 {
983 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
984 _("Checksum ok"), _("sh_unix_self_check"));
985 SL_RETURN((0), _("sh_unix_self_check"));
986 }
987
988 if (0 == sl_strncmp(SH_KEY_NULL, newhash, KEY_LEN))
989 {
990 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
991 _("Could not read samhain executable"), _("sh_unix_self_check"));
992 SL_RETURN((0), _("sh_unix_self_check"));
993 }
994
995 dlog(1, FIL__, __LINE__,
996 _("The checksum of the executable: %s has changed since startup (%s -> %s).\n"),
997 sh.exec.path, sh.exec.hash, newhash);
998
999 sl_snprintf(message, 512,
1000 _("The checksum of %s has changed since startup (%s -> %s)"),
1001 sh.exec.path, sh.exec.hash, newhash);
1002 message[511] = '\0';
1003
1004 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1005 message, _("sh_unix_self_check"));
1006 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_E_AUTH,
1007 sh.exec.path);
1008 SL_RETURN((-1), _("sh_unix_self_check"));
1009}
1010
1011
1012/* ---------------------------------------------------------------- */
1013
1014long sh_group_to_gid (const char * g, int * fail)
1015{
1016 struct group * w;
1017 gid_t gid = 0;
1018 int status = 0;
1019
1020#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1021 struct group grp;
1022 char * buffer;
1023 static size_t gbufsize = SH_GRBUF_SIZE;
1024#endif
1025
1026 *fail = -1;
1027
1028 if (g)
1029 {
1030 size_t i;
1031 size_t len = strlen(g);
1032
1033 *fail = 0;
1034
1035 for (i = 0; i < len; ++i)
1036 {
1037 char c = g[i];
1038
1039 if (!isdigit((int) c))
1040 goto is_a_name;
1041 }
1042 return atol(g);
1043
1044 is_a_name:
1045
1046#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1047
1048 buffer = SH_ALLOC(gbufsize);
1049 status = sh_getgrnam_r(g, &grp, buffer, gbufsize, &w);
1050
1051 if ((status == ERANGE) && (w == NULL))
1052 {
1053 if (S_TRUE == sl_ok_adds( gbufsize, SH_GRBUF_SIZE ))
1054 {
1055 SH_FREE(buffer);
1056 gbufsize += SH_GRBUF_SIZE;
1057 goto is_a_name;
1058 }
1059 }
1060
1061#else
1062
1063 errno = 0;
1064 w = sh_getgrnam(g);
1065 status = errno;
1066
1067#endif
1068
1069 if ((status == ERANGE) && (w == NULL))
1070 {
1071 static int seen = 0;
1072
1073 if (seen == 0)
1074 {
1075 char errbuf[SH_ERRBUF_SIZE];
1076
1077 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
1078 sh_error_message(status, errbuf, sizeof(errbuf)),
1079 _("sh_group_to_gid"), (long) -1, _("line too long in group entry"));
1080 ++seen;
1081 }
1082 *fail = -1;
1083 }
1084 else if (w == NULL)
1085 {
1086 char * tmp = sh_util_strdup(g);
1087 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1088 _("sh_group_to_gid"), tmp);
1089 SH_FREE(tmp);
1090 *fail = -1;
1091 }
1092 else
1093 {
1094 gid = w->gr_gid;
1095 }
1096#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1097 SH_FREE(buffer);
1098#endif
1099 }
1100
1101 return gid;
1102}
1103
1104/* ---------------------------------------------------------------- */
1105
1106
1107/* added Tue Feb 22 10:36:44 NFT 2000 Rainer Wichmann */
1108static int tf_add_trusted_user_int(const char * c)
1109{
1110 struct passwd * w;
1111 int count;
1112 uid_t pwid = (uid_t)-1;
1113
1114#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1115 struct passwd pwd;
1116 char * buffer;
1117#endif
1118
1119 SL_ENTER(_("tf_add_trusted_user_int"));
1120
1121 /* First check for a user name.
1122 */
1123#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1124 buffer = SH_ALLOC(SH_PWBUF_SIZE);
1125 sh_getpwnam_r(c, &pwd, buffer, SH_PWBUF_SIZE, &w);
1126#else
1127 w = sh_getpwnam(c);
1128#endif
1129
1130 if ((w != NULL) && ((pwid = w->pw_uid) > 0))
1131 goto succe;
1132
1133 /* Failed, so check for a numerical value.
1134 */
1135 pwid = strtol(c, (char **)NULL, 10);
1136 if (pwid > 0 && pwid < 65535)
1137 goto succe;
1138
1139 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1140 _("add trusted user"), c);
1141#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1142 SH_FREE(buffer);
1143#endif
1144 SL_RETURN((-1), _("tf_add_trusted_user_int"));
1145
1146 succe:
1147 count = sl_trust_add_user(pwid);
1148#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1149 SH_FREE(buffer);
1150#endif
1151 SL_RETURN((count), _("tf_add_trusted_user_int"));
1152}
1153
1154int tf_add_trusted_user(const char * c)
1155{
1156 int i;
1157 char * q;
1158 char * p = sh_util_strdup (c);
1159#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1160 char * saveptr;
1161#endif
1162
1163 SL_ENTER(_("tf_add_trusted_user"));
1164
1165#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1166 q = strtok_r(p, ", \t", &saveptr);
1167#else
1168 q = strtok(p, ", \t");
1169#endif
1170 if (!q)
1171 {
1172 SH_FREE(p);
1173 SL_RETURN((-1), _("tf_add_trusted_user"));
1174 }
1175 while (q)
1176 {
1177 i = tf_add_trusted_user_int(q);
1178 if (SL_ISERROR(i))
1179 {
1180 SH_FREE(p);
1181 SL_RETURN((i), _("tf_add_trusted_user"));
1182 }
1183#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1184 q = strtok_r(NULL, ", \t", &saveptr);
1185#else
1186 q = strtok(NULL, ", \t");
1187#endif
1188 }
1189 SH_FREE(p);
1190 SL_RETURN((0), _("tf_add_trusted_user"));
1191}
1192
1193extern uid_t sl_trust_baduid(void);
1194extern gid_t sl_trust_badgid(void);
1195
1196#if defined(HOST_IS_CYGWIN) || defined(__cygwin__) || defined(__CYGWIN32__) || defined(__CYGWIN__)
1197int tf_trust_check (const char * file, int mode)
1198{
1199 (void) file;
1200 (void) mode;
1201 return 0;
1202}
1203#else
1204int tf_trust_check (const char * file, int mode)
1205{
1206 char * tmp;
1207 char * tmp2;
1208 char * p;
1209 int status;
1210 int level;
1211 uid_t ff_euid = (uid_t) -1;
1212 uid_t baduid;
1213 gid_t badgid;
1214
1215 SL_ENTER(_("tf_trust_check"));
1216
1217 if (mode == SL_YESPRIV)
1218 sl_get_euid(&ff_euid);
1219 else
1220 sl_get_ruid(&ff_euid);
1221
1222#if defined(SH_WITH_SERVER)
1223 if (0 == sl_ret_euid()) /* privileges not dropped yet */
1224 {
1225#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1226 struct passwd pwd;
1227 char * buffer = SH_ALLOC(SH_PWBUF_SIZE);
1228 struct passwd * tempres;
1229 sh_getpwnam_r(DEFAULT_IDENT, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
1230#else
1231 struct passwd * tempres = sh_getpwnam(DEFAULT_IDENT);
1232#endif
1233
1234 if (!tempres)
1235 {
1236 dlog(1, FIL__, __LINE__,
1237 _("User %s does not exist. Please add the user to your system.\n"),
1238 DEFAULT_IDENT);
1239 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
1240 }
1241 else
1242 {
1243 ff_euid = tempres->pw_uid;
1244 }
1245#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1246 SH_FREE(buffer);
1247#endif
1248 }
1249#endif
1250
1251 status = sl_trustfile_euid(file, ff_euid);
1252
1253 if ( SL_ENONE != status)
1254 {
1255 if (status == SL_ESTAT)
1256 level = SH_ERR_ALL;
1257 else
1258 level = SH_ERR_ERR;
1259
1260 tmp = sh_util_safe_name (file);
1261 p = sh_util_strdup(sl_trust_errfile());
1262 baduid = sl_trust_baduid();
1263 badgid = sl_trust_badgid();
1264
1265 if (p && *p != '\0')
1266 {
1267 tmp2 = sh_util_safe_name (p);
1268 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST2,
1269 sl_error_string(status), tmp, tmp2);
1270 SH_FREE(tmp2);
1271 }
1272 else
1273 {
1274 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST1,
1275 sl_error_string(status), tmp);
1276 }
1277
1278 if (status == SL_EBADUID || status == SL_EBADGID ||
1279 status == SL_EBADOTH || status == SL_ETRUNC ||
1280 status == SL_EINTERNAL )
1281 {
1282 switch (status) {
1283 case SL_EINTERNAL:
1284 dlog(1, FIL__, __LINE__,
1285 _("An internal error occured in the trustfile function.\n"));
1286 break;
1287 case SL_ETRUNC:
1288 dlog(1, FIL__, __LINE__,
1289 _("A filename truncation occured in the trustfile function.\nProbably the normalized filename for %s\nis too long. This may be due e.g. to deep or circular softlinks.\n"),
1290 tmp);
1291 break;
1292 case SL_EBADOTH:
1293 dlog(1, FIL__, __LINE__,
1294 _("The path element: %s\nin the filename: %s is world writeable.\n"),
1295 (p) ? p : _("(null)"), tmp);
1296 break;
1297 case SL_EBADUID:
1298 dlog(1, FIL__, __LINE__,
1299 _("The owner (UID = %ld) of the path element: %s\nin the filename: %s\nis not in the list of trusted users.\nTo fix the problem, you can:\n - run ./configure again with the option --with-trusted=0,...,UID\n where UID is the UID of the untrusted user, or\n - use the option TrustedUser=UID in the configuration file.\n"),
1300 (UID_CAST)baduid, (p) ? p : _("(null)"), tmp);
1301 break;
1302 case SL_EBADGID:
1303 dlog(1, FIL__, __LINE__,
1304 _("The path element: %s\nin the filename: %s\nis group writeable (GID = %ld), and at least one of the group\nmembers (UID = %ld) is not in the list of trusted users.\nTo fix the problem, you can:\n - run ./configure again with the option --with-trusted=0,...,UID\n where UID is the UID of the untrusted user, or\n - use the option TrustedUser=UID in the configuration file.\n"),
1305 (p) ? p : _("(null)"), tmp, (UID_CAST)badgid,
1306 (UID_CAST)baduid);
1307 break;
1308 default:
1309 break;
1310 }
1311 SH_FREE(tmp);
1312 if (p) SH_FREE(p);
1313 SL_RETURN((-1), _("tf_trust_check"));
1314 }
1315 else {
1316 SH_FREE(tmp);
1317 if (p) SH_FREE(p);
1318 }
1319 }
1320
1321 SL_RETURN((0), _("tf_trust_check"));
1322}
1323#endif
1324
1325#ifdef HAVE_INITGROUPS
1326#ifdef HOST_IS_OSF
1327int sh_unix_initgroups ( char * in_user, gid_t in_gid)
1328#else
1329int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1330#endif
1331{
1332 int status = -1;
1333 status = sh_initgroups (in_user, in_gid);
1334 if (status < 0)
1335 {
1336 if (errno == EPERM)
1337 return 0;
1338 if (errno == EINVAL)
1339 return 0;
1340 return -1;
1341 }
1342 return 0;
1343}
1344#else
1345int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1346{
1347 (void) in_user;
1348 (void) in_gid;
1349 return 0;
1350}
1351#endif
1352
1353#ifdef HAVE_INITGROUPS
1354char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len);
1355int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1356{
1357 int status = -1;
1358 char user[SH_MINIBUF];
1359
1360 SL_ENTER(_("sh_unix_initgroups2"));
1361
1362 if (NULL == sh_unix_getUIDname (SH_ERR_ERR, in_pid, user, sizeof(user)))
1363 SL_RETURN((-1), _("sh_unix_initgroups2"));
1364 status = sh_initgroups (user, in_gid);
1365 if (status < 0)
1366 {
1367 if (errno == EPERM)
1368 status = 0;
1369 if (errno == EINVAL)
1370 status = 0;
1371 }
1372 SL_RETURN((status), _("sh_unix_initgroups2"));
1373}
1374#else
1375int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1376{
1377 (void) in_pid;
1378 (void) in_gid;
1379 return 0;
1380}
1381#endif
1382
1383void sh_unix_closeall (int fd, int except, int inchild)
1384{
1385 int fdx = fd;
1386#ifdef _SC_OPEN_MAX
1387 int fdlimit = sysconf (_SC_OPEN_MAX);
1388#else
1389#ifdef OPEN_MAX
1390 int fdlimit = OPEN_MAX;
1391#else
1392 int fdlimit = _POSIX_OPEN_MAX;
1393#endif
1394#endif
1395
1396 SL_ENTER(_("sh_unix_closeall"));
1397
1398 /* can't happen - so fix it :-(
1399 */
1400 if (fdlimit < 0)
1401 fdlimit = 20; /* POSIX lower limit */
1402
1403 if (fdlimit > 65536)
1404 fdlimit = 65536;
1405
1406 if (!inchild)
1407 sl_dropall (fdx, except);
1408 else
1409 sl_dropall_dirty (fdx, except);
1410
1411 /* Close everything from fd (inclusive) up to fdlimit (exclusive).
1412 */
1413 while (fd < fdlimit)
1414 {
1415 if (fd == except)
1416 fd++;
1417 else if (slib_do_trace != 0 && fd == slib_trace_fd)
1418 fd++;
1419 else
1420 sl_close_fd(FIL__, __LINE__, fd++);
1421 }
1422
1423 SL_RET0(_("sh_unix_closeall"));
1424}
1425
1426static void sh_unix_setlimits(void)
1427{
1428 struct rlimit limits;
1429
1430 SL_ENTER(_("sh_unix_setlimits"));
1431
1432 limits.rlim_cur = RLIM_INFINITY;
1433 limits.rlim_max = RLIM_INFINITY;
1434
1435#ifdef RLIMIT_CPU
1436 setrlimit (RLIMIT_CPU, &limits);
1437#endif
1438#ifdef RLIMIT_FSIZE
1439 setrlimit (RLIMIT_FSIZE, &limits);
1440#endif
1441#ifdef RLIMIT_DATA
1442 setrlimit (RLIMIT_DATA, &limits);
1443#endif
1444#ifdef RLIMIT_STACK
1445 setrlimit (RLIMIT_STACK, &limits);
1446#endif
1447#ifdef RLIMIT_RSS
1448 setrlimit (RLIMIT_RSS, &limits);
1449#endif
1450#ifdef RLIMIT_NPROC
1451 setrlimit (RLIMIT_NPROC, &limits);
1452#endif
1453#ifdef RLIMIT_MEMLOCK
1454 setrlimit (RLIMIT_MEMLOCK, &limits);
1455#endif
1456
1457#if !defined(SL_DEBUG)
1458 /* no core dumps
1459 */
1460 limits.rlim_cur = 0;
1461 limits.rlim_max = 0;
1462#ifdef RLIMIT_CORE
1463 setrlimit (RLIMIT_CORE, &limits);
1464#endif
1465#else
1466#ifdef RLIMIT_CORE
1467 setrlimit (RLIMIT_CORE, &limits);
1468#endif
1469#endif
1470
1471 limits.rlim_cur = 1024;
1472 limits.rlim_max = 1024;
1473
1474#if defined(RLIMIT_NOFILE)
1475 setrlimit (RLIMIT_NOFILE, &limits);
1476#elif defined(RLIMIT_OFILE)
1477 setrlimit (RLIMIT_OFILE, &limits);
1478#endif
1479
1480 SL_RET0(_("sh_unix_setlimits"));
1481}
1482
1483static void sh_unix_copyenv(void)
1484{
1485 char ** env0 = environ;
1486 char ** env1;
1487 int envlen = 0;
1488 size_t len;
1489
1490 SL_ENTER(_("sh_unix_copyenv"));
1491
1492 while (env0 != NULL && env0[envlen] != NULL) {
1493 /* printf("%2d: %s\n", envlen, env0[envlen]); */
1494 ++envlen;
1495 }
1496 ++envlen;
1497
1498 /* printf("-> %2d: slots allocated\n", envlen); */
1499 env1 = calloc(1,sizeof(char *) * envlen); /* only once */
1500 if (env1 == NULL)
1501 {
1502 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1503 SL_RET0(_("sh_unix_copyenv"));
1504 }
1505 env0 = environ;
1506 envlen = 0;
1507
1508 while (env0 != NULL && env0[envlen] != NULL) {
1509 len = strlen(env0[envlen]) + 1;
1510 env1[envlen] = calloc(1,len); /* only once */
1511 if (env1[envlen] == NULL)
1512 {
1513 int i;
1514 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1515 for (i = 0; i < envlen; ++i) free(env1[len]);
1516 free(env1);
1517 SL_RET0(_("sh_unix_copyenv"));
1518 }
1519 sl_strlcpy(env1[envlen], env0[envlen], len);
1520 ++envlen;
1521 }
1522 env1[envlen] = NULL;
1523
1524 environ = env1;
1525 SL_RET0(_("sh_unix_copyenv"));
1526}
1527
1528/* delete all environment variables
1529 */
1530static void sh_unix_zeroenv(void)
1531{
1532 char * c;
1533 char ** env;
1534
1535 SL_ENTER(_("sh_unix_zeroenv"));
1536
1537 sh_unix_copyenv();
1538 env = environ;
1539
1540 while (env != NULL && *env != NULL) {
1541 c = strchr ((*env), '=');
1542#ifdef WITH_MYSQL
1543 /*
1544 * Skip the MYSQL_UNIX_PORT environment variable; MySQL may need it.
1545 */
1546 if (0 == sl_strncmp((*env), _("MYSQL_UNIX_PORT="), 16))
1547 {
1548 ++(env);
1549 continue;
1550 }
1551 if (0 == sl_strncmp((*env), _("MYSQL_TCP_PORT="), 15))
1552 {
1553 ++(env);
1554 continue;
1555 }
1556 if (0 == sl_strncmp((*env), _("MYSQL_HOME="), 11))
1557 {
1558 ++(env);
1559 continue;
1560 }
1561#endif
1562#ifdef WITH_ORACLE
1563 /*
1564 * Skip the ORACLE_HOME and TNS_ADMIN environment variables;
1565 * Oracle may need them.
1566 */
1567 if (0 == sl_strncmp((*env), _("ORACLE_HOME="), 12))
1568 {
1569 ++(env);
1570 continue;
1571 }
1572 if (0 == sl_strncmp((*env), _("TNS_ADMIN="), 10))
1573 {
1574 ++(env);
1575 continue;
1576 }
1577#endif
1578 /*
1579 * Skip the TZ environment variable.
1580 */
1581 if (0 == sl_strncmp((*env), _("TZ="), 3))
1582 {
1583 ++(env);
1584 continue;
1585 }
1586 ++(env);
1587 if (c != NULL)
1588 {
1589 ++c;
1590 while ((*c) != '\0') {
1591 (*c) = '\0';
1592 ++c;
1593 }
1594 }
1595 }
1596
1597#ifdef HAVE_TZSET
1598 tzset();
1599#endif
1600
1601 SL_RET0(_("sh_unix_zeroenv"));
1602}
1603
1604
1605static void sh_unix_resettimer(void)
1606{
1607 struct itimerval this_timer;
1608
1609 SL_ENTER(_("sh_unix_resettimer"));
1610
1611 this_timer.it_value.tv_sec = 0;
1612 this_timer.it_value.tv_usec = 0;
1613
1614 this_timer.it_interval.tv_sec = 0;
1615 this_timer.it_interval.tv_usec = 0;
1616
1617 setitimer(ITIMER_REAL, &this_timer, NULL);
1618#if !defined(SH_PROFILE)
1619 setitimer(ITIMER_VIRTUAL, &this_timer, NULL);
1620 setitimer(ITIMER_PROF, &this_timer, NULL);
1621#endif
1622
1623 SL_RET0(_("sh_unix_resettimer"));
1624}
1625
1626static void sh_unix_resetsignals(void)
1627{
1628 int sig_num;
1629#ifdef NSIG
1630 int max_sig = NSIG;
1631#else
1632 int max_sig = 255;
1633#endif
1634 int test;
1635 int status;
1636 struct sigaction act;
1637#if !defined(SH_PROFILE)
1638 struct sigaction oldact;
1639#endif
1640
1641 sigset_t set_proc;
1642
1643 SL_ENTER(_("sh_unix_resetsignals"));
1644 /*
1645 * Reset the current signal mask (inherited from parent process).
1646 */
1647
1648 sigfillset(&set_proc);
1649
1650 do {
1651 errno = 0;
1652 test = SH_SETSIGMASK(SIG_UNBLOCK, &set_proc, NULL);
1653 } while (test < 0 && errno == EINTR);
1654
1655 /*
1656 * Reset signal handling.
1657 */
1658
1659 act.sa_handler = SIG_DFL; /* signal action */
1660 sigemptyset( &act.sa_mask ); /* set an empty mask */
1661 act.sa_flags = 0; /* init sa_flags */
1662
1663 for (sig_num = 1; sig_num <= max_sig; ++sig_num)
1664 {
1665#if !defined(SH_PROFILE)
1666 test = retry_sigaction(FIL__, __LINE__, sig_num, &act, &oldact);
1667#else
1668 test = 0;
1669#endif
1670 if ((test == -1) && (errno != EINVAL))
1671 {
1672 char errbuf[SH_ERRBUF_SIZE];
1673 status = errno;
1674 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_SIG,
1675 sh_error_message (status, errbuf, sizeof(errbuf)), sig_num);
1676 }
1677 }
1678
1679 SL_RET0(_("sh_unix_resetsignals"));
1680}
1681
1682/* Get the local hostname (FQDN)
1683 */
1684static char * sh_tolower (char * s)
1685{
1686 char * ret = s;
1687 if (s)
1688 {
1689 for (; *s; ++s)
1690 {
1691 *s = tolower((unsigned char) *s);
1692 }
1693 }
1694 return ret;
1695}
1696
1697
1698#include <sys/socket.h>
1699
1700/* Required for BSD
1701 */
1702#ifdef HAVE_NETINET_IN_H
1703#include <netinet/in.h>
1704#endif
1705
1706#include <arpa/inet.h>
1707
1708const char * sh_unix_h_name (struct hostent * host_entry)
1709{
1710 char ** p;
1711 if (strchr(host_entry->h_name, '.')) {
1712 return host_entry->h_name;
1713 } else {
1714 for (p = host_entry->h_aliases; *p; ++p) {
1715 if (strchr(*p, '.'))
1716 return *p;
1717 }
1718 }
1719 return host_entry->h_name;
1720}
1721
1722/* uname() on FreeBSD is broken, because the 'nodename' buf is too small
1723 * to hold a valid (leftmost) domain label.
1724 */
1725#if defined(HAVE_UNAME) && !defined(HOST_IS_FREEBSD)
1726#include <sys/utsname.h>
1727void sh_unix_localhost()
1728{
1729 struct utsname buf;
1730 int i;
1731 unsigned int ddot;
1732 int len;
1733 char * p;
1734 char hostname[256];
1735 char numeric[SH_IP_BUF];
1736 char * canonical;
1737
1738
1739 SL_ENTER(_("sh_unix_localhost"));
1740
1741 (void) uname (&buf);
1742 /* flawfinder: ignore */ /* ff bug, ff sees system() */
1743 sl_strlcpy (sh.host.system, buf.sysname, SH_MINIBUF);
1744 sl_strlcpy (sh.host.release, buf.release, SH_MINIBUF);
1745 sl_strlcpy (sh.host.machine, buf.machine, SH_MINIBUF);
1746
1747 /* Workaround for cases where nodename could be
1748 * a truncated FQDN.
1749 */
1750 if (strlen(buf.nodename) == (sizeof(buf.nodename)-1))
1751 {
1752 p = strchr(buf.nodename, '.');
1753 if (NULL != p) {
1754 *p = '\0';
1755 sl_strlcpy(hostname, buf.nodename, 256);
1756 } else {
1757#ifdef HAVE_GETHOSTNAME
1758 if (0 != gethostname(hostname, 256))
1759 {
1760 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1761 _("nodename returned by uname may be truncated"),
1762 _("sh_unix_localhost"));
1763 sl_strlcpy (hostname, buf.nodename, 256);
1764 }
1765 else
1766 {
1767 hostname[255] = '\0';
1768 }
1769#else
1770 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1771 _("nodename returned by uname may be truncated"),
1772 _("sh_unix_localhost"));
1773 sl_strlcpy(hostname, buf.nodename, 256);
1774#endif
1775 }
1776 }
1777 else
1778 {
1779 sl_strlcpy(hostname, buf.nodename, 256);
1780 }
1781
1782 canonical = sh_ipvx_canonical(hostname, numeric, sizeof(numeric));
1783
1784 if (canonical == NULL)
1785 {
1786 sl_strlcpy (sh.host.name, hostname, SH_PATHBUF);
1787 sh_tolower (sh.host.name);
1788 }
1789 else
1790 {
1791 sl_strlcpy (sh.host.name, canonical, SH_PATHBUF);
1792 SH_FREE(canonical);
1793 }
1794
1795 /* check whether it looks like a FQDN
1796 */
1797 len = sl_strlen(sh.host.name);
1798 ddot = 0;
1799 for (i = 0; i < len; ++i)
1800 if (sh.host.name[i] == '.') ++ddot;
1801
1802 if (ddot == 0)
1803 {
1804 dlog(1, FIL__, __LINE__,
1805 _("According to uname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN.\nRather, it resolves this to %s.\nFor more information, see the entry about self-resolving under\n'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1806 hostname, sh.host.name);
1807 sl_strlcpy (sh.host.name, numeric, SH_PATHBUF);
1808 SL_RET0(_("sh_unix_localhost"));
1809 }
1810
1811 if (sh_ipvx_is_numeric(sh.host.name))
1812 {
1813 dlog(1, FIL__, __LINE__,
1814 _("According to uname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN.\nRather, it resolves this to %s.\nFor more information, see the entry about self-resolving under\n'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1815 hostname, sh.host.name);
1816 }
1817
1818 SL_RET0(_("sh_unix_localhost"));
1819}
1820
1821#else
1822
1823/*
1824 * --FreeBSD code
1825 */
1826#if defined(HAVE_UNAME)
1827#include <sys/utsname.h>
1828#endif
1829void sh_unix_localhost()
1830{
1831#if defined(HAVE_UNAME)
1832 struct utsname buf;
1833#endif
1834 int i;
1835 int ddot;
1836 int len;
1837 char hostname[1024];
1838 char numeric[SH_IP_BUF];
1839 char * canonical;
1840
1841 SL_ENTER(_("sh_unix_localhost"));
1842
1843#if defined(HAVE_UNAME)
1844 (void) uname (&buf);
1845 /* flawfinder: ignore */ /* ff bug, ff sees system() */
1846 sl_strlcpy (sh.host.system, buf.sysname, SH_MINIBUF);
1847 sl_strlcpy (sh.host.release, buf.release, SH_MINIBUF);
1848 sl_strlcpy (sh.host.machine, buf.machine, SH_MINIBUF);
1849#endif
1850
1851 (void) gethostname (hostname, 1024);
1852 hostname[1023] = '\0';
1853
1854 canonical = sh_ipvx_canonical(hostname, numeric, sizeof(numeric));
1855
1856 if (canonical == NULL)
1857 {
1858 sl_strlcpy (sh.host.name, hostname, SH_PATHBUF);
1859 sh_tolower (sh.host.name);
1860 }
1861 else
1862 {
1863 sl_strlcpy (sh.host.name, canonical, SH_PATHBUF);
1864 SH_FREE(canonical);
1865 }
1866
1867 /* check whether it looks like a FQDN
1868 */
1869 len = sl_strlen(sh.host.name);
1870 ddot = 0;
1871 for (i = 0; i < len; ++i)
1872 if (sh.host.name[i] == '.') ++ddot;
1873 if (ddot == 0)
1874 {
1875 dlog(1, FIL__, __LINE__,
1876 _("According to uname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN.\nRather, it resolves this to %s.\nFor more information, see the entry about self-resolving under\n'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1877 hostname, sh.host.name);
1878 sl_strlcpy (sh.host.name, numeric, SH_PATHBUF);
1879 SL_RET0(_("sh_unix_localhost"));
1880 }
1881
1882 if (sh_ipvx_is_numeric(sh.host.name))
1883 {
1884 dlog(1, FIL__, __LINE__,
1885 _("According to uname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN.\nRather, it resolves this to %s.\nFor more information, see the entry about self-resolving under\n'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1886 hostname, sh.host.name);
1887 }
1888
1889 SL_RET0(_("sh_unix_localhost"));
1890}
1891#endif
1892
1893
1894void sh_unix_memlock()
1895{
1896 SL_ENTER(_("sh_unix_memlock"));
1897
1898 /* do this before dropping privileges
1899 */
1900#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
1901 if (skey->mlock_failed == S_FALSE)
1902 {
1903 if ( (-1) == sh_unix_mlock( FIL__, __LINE__,
1904 (char *) skey, sizeof (sh_key_t)) )
1905 {
1906 SH_MUTEX_LOCK_UNSAFE(mutex_skey);
1907 skey->mlock_failed = S_TRUE;
1908 SH_MUTEX_UNLOCK_UNSAFE(mutex_skey);
1909 }
1910 }
1911#else
1912 if (skey->mlock_failed == S_FALSE)
1913 {
1914 SH_MUTEX_LOCK_UNSAFE(mutex_skey);
1915 skey->mlock_failed = S_TRUE;
1916 SH_MUTEX_UNLOCK_UNSAFE(mutex_skey);
1917 }
1918#endif
1919
1920 SL_RET0(_("sh_unix_memlock"));
1921}
1922
1923#ifdef SH_WITH_SERVER
1924char * chroot_dir = NULL;
1925
1926int sh_unix_set_chroot(const char * str)
1927{
1928 size_t len;
1929 static int block = 0;
1930
1931 if (block == 1)
1932 return 0;
1933
1934 if (str && *str == '/')
1935 {
1936 len = strlen(str) + 1;
1937 chroot_dir = calloc(1,strlen(str) + 1); /* only once */
1938 if (!chroot_dir)
1939 {
1940 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1941 return 1;
1942 }
1943 sl_strlcpy(chroot_dir, str, len);
1944 block = 1;
1945 return 0;
1946 }
1947 return 1;
1948}
1949
1950int sh_unix_chroot(void)
1951{
1952 int status;
1953
1954 if (chroot_dir != NULL)
1955 {
1956 status = retry_aud_chdir(FIL__, __LINE__, chroot_dir);
1957 if ( (-1) == status )
1958 {
1959 char errbuf[SH_ERRBUF_SIZE];
1960 status = errno;
1961 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
1962 sh_error_message (status, errbuf, sizeof(errbuf)), chroot_dir);
1963 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1964 }
1965 /* flawfinder: ignore */
1966 return (chroot(chroot_dir));
1967 }
1968 return 0;
1969}
1970/* #ifdef SH_WITH_SERVER */
1971#else
1972int sh_unix_chroot(void) { return 0; }
1973#endif
1974
1975/* daemon mode
1976 */
1977static int block_setdeamon = 0;
1978
1979int sh_unix_setdeamon(const char * dummy)
1980{
1981 int res = 0;
1982
1983 SL_ENTER(_("sh_unix_setdeamon"));
1984
1985 if (block_setdeamon != 0)
1986 SL_RETURN((0),_("sh_unix_setdeamon"));
1987
1988 if (dummy == NULL)
1989 sh.flag.isdaemon = S_TRUE;
1990 else
1991 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
1992
1993 if (sh.flag.opts == S_TRUE)
1994 block_setdeamon = 1;
1995
1996 SL_RETURN(res, _("sh_unix_setdeamon"));
1997}
1998#if defined(HAVE_LIBPRELUDE)
1999#include "sh_prelude.h"
2000#endif
2001
2002int sh_unix_setnodeamon(const char * dummy)
2003{
2004 int res = 0;
2005
2006 SL_ENTER(_("sh_unix_setnodeamon"));
2007
2008 if (block_setdeamon != 0)
2009 SL_RETURN((0),_("sh_unix_setmodeamon"));
2010
2011 if (dummy == NULL)
2012 sh.flag.isdaemon = S_FALSE;
2013 else
2014 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
2015
2016 if (sh.flag.opts == S_TRUE)
2017 block_setdeamon = 1;
2018
2019 SL_RETURN(res, _("sh_unix_setnodeamon"));
2020}
2021
2022int sh_unix_init(int goDaemon)
2023{
2024 int status;
2025 uid_t uid;
2026 pid_t oldpid = getpid();
2027#if defined(SH_WITH_SERVER)
2028 extern int sh_socket_open_int (void);
2029#endif
2030 char errbuf[SH_ERRBUF_SIZE];
2031
2032 extern void sh_kill_sub();
2033
2034 SL_ENTER(_("sh_unix_init"));
2035
2036 /* fork twice, exit the parent process
2037 */
2038 if (goDaemon == 1) {
2039
2040 switch (aud_fork(FIL__, __LINE__)) {
2041 case 0: break; /* child process continues */
2042 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
2043 default: /* parent process exits */
2044 sh_kill_sub();
2045 aud__exit(FIL__, __LINE__, 0);
2046 }
2047
2048 /* Child processes do not inherit page locks across a fork.
2049 * Error in next fork would return in this (?) thread of execution.
2050 */
2051 sh_unix_memlock();
2052
2053 setsid(); /* should not fail */
2054 sh.pid = (UINT64) getpid();
2055
2056 switch (aud_fork(FIL__, __LINE__)) {
2057 case 0: break; /* child process continues */
2058 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
2059 default: /* parent process exits */
2060 sh_kill_sub();
2061 aud__exit(FIL__, __LINE__, 0);
2062 }
2063
2064 /* Child processes do not inherit page locks across a fork.
2065 */
2066 sh_unix_memlock();
2067 sh.pid = (UINT64) getpid();
2068
2069 } else {
2070 setsid(); /* should not fail */
2071 }
2072
2073 /* set working directory
2074 */
2075#ifdef SH_PROFILE
2076 status = 0;
2077#else
2078 status = retry_aud_chdir(FIL__, __LINE__, "/");
2079#endif
2080 if ( (-1) == status )
2081 {
2082 status = errno;
2083 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
2084 sh_error_message (status, errbuf, sizeof(errbuf)), "/");
2085 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2086 }
2087
2088 /* reset timers
2089 */
2090 sh_unix_resettimer();
2091
2092 /* signal handlers
2093 */
2094 sh_unix_resetsignals();
2095#if defined(SCREW_IT_UP)
2096 sh_sigtrap_prepare();
2097#endif
2098 sh_unix_siginstall (goDaemon);
2099
2100 /* set file creation mask
2101 */
2102 (void) umask (0); /* should not fail */
2103
2104 /* set resource limits to maximum, and
2105 * core dump size to zero
2106 */
2107 sh_unix_setlimits();
2108
2109 /* zero out the environment (like PATH='\0')
2110 */
2111 sh_unix_zeroenv();
2112
2113 if (goDaemon == 1)
2114 {
2115 /* Close first tree file descriptors
2116 */
2117 sl_close_fd (FIL__, __LINE__, 0); /* if running as daemon */
2118 sl_close_fd (FIL__, __LINE__, 1); /* if running as daemon */
2119 sl_close_fd (FIL__, __LINE__, 2); /* if running as daemon */
2120
2121 /* Enable full error logging
2122 */
2123 sh_error_only_stderr (S_FALSE);
2124
2125 /* open first three streams to /dev/null
2126 */
2127 status = aud_open(FIL__, __LINE__, SL_NOPRIV, _("/dev/null"), O_RDWR, 0);
2128 if (status < 0)
2129 {
2130 status = errno;
2131 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2132 sh_error_message(status, errbuf, sizeof(errbuf)), _("open"));
2133 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2134 }
2135
2136 status = retry_aud_dup(FIL__, __LINE__, 0);
2137 if (status >= 0)
2138 retry_aud_dup(FIL__, __LINE__, 0);
2139
2140 if (status < 0)
2141 {
2142 status = errno;
2143 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2144 sh_error_message(status, errbuf, sizeof(errbuf)), _("dup"));
2145 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2146 }
2147
2148 sh_error_enable_unsafe (S_TRUE);
2149#if defined(HAVE_LIBPRELUDE)
2150 sh_prelude_reset ();
2151#endif
2152
2153 /* --- wait until parent has exited ---
2154 */
2155 while (1 == 1)
2156 {
2157 errno = 0;
2158 if (0 > aud_kill (FIL__, __LINE__, oldpid, 0) && errno == ESRCH)
2159 {
2160 break;
2161 }
2162 retry_msleep(0, 1);
2163 }
2164
2165 /* write PID file
2166 */
2167 status = sh_unix_write_pid_file();
2168 if (status < 0)
2169 {
2170 sl_get_euid(&uid);
2171 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_PIDFILE,
2172 (long) uid, sh.srvlog.alt);
2173 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2174 }
2175#if defined(SH_WITH_SERVER)
2176 sh_socket_open_int ();
2177#endif
2178 }
2179 else
2180 {
2181 sh_error_enable_unsafe (S_TRUE);
2182#if defined(HAVE_LIBPRELUDE)
2183 sh_prelude_reset ();
2184#endif
2185#if defined(SH_WITH_SERVER)
2186 sh_socket_open_int ();
2187#endif
2188 }
2189
2190 /* chroot (this is a no-op if no chroot dir is specified
2191 */
2192 status = sh_unix_chroot();
2193 if (status < 0)
2194 {
2195 status = errno;
2196 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2197 sh_error_message(status, errbuf, sizeof(errbuf)), _("chroot"));
2198 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2199 }
2200
2201 /* drop capabilities
2202 */
2203 sl_drop_cap();
2204
2205 SL_RETURN((0),_("sh_unix_init"));
2206}
2207
2208/* --- run a command, securely --- */
2209
2210int sh_unix_run_command (const char * str)
2211{
2212 pid_t pid;
2213 char * arg[4];
2214 char * env[5];
2215 char * path = sh_util_strdup(_("/bin/sh"));
2216
2217 int status = -1;
2218
2219 arg[0] = sh_util_strdup(_("/bin/sh"));
2220 arg[1] = sh_util_strdup(_("-c"));
2221 arg[2] = sh_util_strdup(str);
2222 arg[3] = NULL;
2223
2224 env[0] = sh_util_strdup(_("PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/ucb"));
2225 env[1] = sh_util_strdup(_("SHELL=/bin/sh"));
2226 env[2] = sh_util_strdup(_("IFS= \t\n"));
2227 if (getenv("TZ")) { /* flawfinder: ignore */
2228 char * tz = sh_util_strdup(getenv("TZ")); /* flawfinder: ignore */
2229 size_t tzlen = strlen(tz);
2230 if (S_TRUE == sl_ok_adds (4, tzlen)) {
2231 env[3] = SH_ALLOC(4+tzlen);
2232 sl_strlcpy(env[3], "TZ=", 4);
2233 sl_strlcat(env[3], tz , 4+tzlen);
2234 } else {
2235 env[3] = NULL;
2236 }
2237 } else {
2238 env[3] = NULL;
2239 }
2240 env[4] = NULL;
2241
2242 pid = fork();
2243
2244 if (pid == (pid_t)(-1))
2245 {
2246 return -1;
2247 }
2248
2249 else if (pid == 0) /* child */
2250 {
2251 memset(skey, 0, sizeof(sh_key_t));
2252 (void) umask(S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
2253 sh_unix_closeall (3, -1, S_TRUE); /* in child process */
2254 execve(path, arg, env);
2255 _exit(EXIT_FAILURE);
2256 }
2257
2258 else /* parent */
2259 {
2260 int r;
2261
2262 while((r = waitpid(pid, &status, WUNTRACED)) != pid && r != -1) ;
2263
2264#if !defined(USE_UNO)
2265 if (r == -1 || !WIFEXITED(status))
2266 {
2267 status = -1;
2268 }
2269 else
2270 {
2271 status = WEXITSTATUS(status);
2272 }
2273#endif
2274 }
2275
2276 return status;
2277}
2278
2279/********************************************************
2280 *
2281 * TIME
2282 *
2283 ********************************************************/
2284
2285/* Figure out the time offset of the current timezone
2286 * in a portable way.
2287 */
2288char * t_zone(const time_t * xx)
2289{
2290 struct tm aa;
2291 struct tm bb;
2292
2293 struct tm * aptr;
2294 struct tm * bptr;
2295
2296 int sign = 0;
2297 int diff = 0;
2298 int hh, mm;
2299 static char tz[64];
2300
2301 SL_ENTER(_("t_zone"));
2302
2303#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2304 aptr = gmtime_r (xx, &aa);
2305#else
2306 aptr = gmtime(xx);
2307 if (aptr)
2308 memcpy (&aa, aptr, sizeof(struct tm));
2309#endif
2310
2311#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2312 bptr = localtime_r (xx, &bb);
2313#else
2314 bptr = localtime(xx);
2315 if (bptr)
2316 memcpy (&bb, bptr, sizeof(struct tm));
2317#endif
2318
2319 if (bptr && aptr)
2320 {
2321 /* Check for datum wrap-around.
2322 */
2323 if ((aa.tm_mday == 1) && (aa.tm_mday < bb.tm_mday) && (aa.tm_hour < bb.tm_hour))
2324 sign = ( 1);
2325 else if (aa.tm_year < bb.tm_year)
2326 sign = (-1);
2327 else if (aa.tm_mon < bb.tm_mon)
2328 sign = (-1);
2329 else if (aa.tm_mday < bb.tm_mday)
2330 sign = (-1);
2331 else if (bb.tm_year < aa.tm_year)
2332 sign = ( 1);
2333 else if (bb.tm_mon < aa.tm_mon)
2334 sign = ( 1);
2335 else if (bb.tm_mday < aa.tm_mday)
2336 sign = ( 1);
2337
2338 diff = aa.tm_hour * 60 + aa.tm_min;
2339 diff = (bb.tm_hour * 60 + bb.tm_min) - diff;
2340 diff = diff - (sign * 24 * 60); /* datum wrap-around correction */
2341 hh = diff / 60;
2342 mm = diff - (hh * 60);
2343 sl_snprintf (tz, sizeof(tz), _("%+03d%02d"), hh, mm); /* known to fit */
2344 }
2345 else
2346 {
2347 sl_snprintf (tz, sizeof(tz), _("%+03d%02d"), 0, 0);
2348 }
2349 SL_RETURN(tz, _("t_zone"));
2350}
2351
2352unsigned long sh_unix_longtime ()
2353{
2354 return ((unsigned long)time(NULL));
2355}
2356
2357#ifdef HAVE_GETTIMEOFDAY
2358unsigned long sh_unix_notime ()
2359{
2360 struct timeval tv;
2361
2362 gettimeofday (&tv, NULL);
2363
2364 return ((unsigned long)(tv.tv_sec + tv.tv_usec * 10835 + getpid() + getppid()));
2365
2366}
2367#endif
2368
2369static int count_dev_time = 0;
2370
2371void reset_count_dev_time(void)
2372{
2373 count_dev_time = 0;
2374 return;
2375}
2376
2377int sh_unix_settimeserver (const char * address)
2378{
2379
2380 SL_ENTER(_("sh_unix_settimeserver"));
2381
2382 if (address != NULL && count_dev_time < 2
2383 && sl_strlen(address) < SH_PATHBUF)
2384 {
2385 if (count_dev_time == 0)
2386 sl_strlcpy (sh.srvtime.name, address, SH_PATHBUF);
2387 else
2388 sl_strlcpy (sh.srvtime.alt, address, SH_PATHBUF);
2389
2390 ++count_dev_time;
2391 SL_RETURN((0), _("sh_unix_settimeserver"));
2392 }
2393 SL_RETURN((-1), _("sh_unix_settimeserver"));
2394}
2395
2396
2397#ifdef HAVE_NTIME
2398#define UNIXEPOCH 2208988800UL /* difference between Unix time and net time
2399 * The UNIX EPOCH starts in 1970.
2400 */
2401#include <sys/socket.h>
2402#include <netinet/in.h>
2403#include <arpa/inet.h>
2404#include <netdb.h>
2405#include <ctype.h>
2406#endif
2407
2408/* Timeserver service. */
2409/* define is missing on HP-UX 10.20 */
2410#ifndef IPPORT_TIMESERVER
2411#define IPPORT_TIMESERVER 37
2412#endif
2413
2414char * sh_unix_time (time_t thetime, char * buffer, size_t len)
2415{
2416
2417 int status;
2418 char AsciiTime[81]; /* local time */
2419 time_t time_now;
2420 struct tm * time_ptr;
2421#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2422 struct tm time_tm;
2423#endif
2424#ifdef SH_USE_XML
2425 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2426#else
2427 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2428#endif
2429
2430#ifdef HAVE_NTIME
2431 int fd; /* network file descriptor */
2432 u_char net_time[4]; /* remote time in network format */
2433 static int failerr = 0; /* no net time */
2434 int fail = 0; /* no net time */
2435 int errflag;
2436 char errmsg[256];
2437 char error_call[SH_MINIBUF];
2438 int error_num;
2439#endif
2440
2441 SL_ENTER(_("sh_unix_time"));
2442
2443#ifdef HAVE_NTIME
2444 if (thetime == 0)
2445 {
2446 if (sh.srvtime.name[0] == '\0')
2447 {
2448 fail = 1;
2449 (void) time (&time_now);
2450 }
2451 else /* have a timeserver address */
2452 {
2453 /* don't call timeserver more than once per second */
2454 static time_t time_old = 0;
2455 time_t time_new;
2456 static time_t time_saved = 0;
2457 (void) time (&time_new);
2458 if ((time_new == time_old) && (time_saved != 0))
2459 {
2460 time_now = time_saved;
2461 goto end;
2462 }
2463 time_old = time_new;
2464
2465
2466 fd = connect_port_2 (sh.srvtime.name, sh.srvtime.alt,
2467 IPPORT_TIMESERVER,
2468 error_call, &error_num, errmsg, sizeof(errmsg));
2469 if (fd >= 0)
2470 {
2471 if (4 != read_port (fd, (char *) net_time, 4, &errflag, 2))
2472 {
2473 fail = 1;
2474 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2475 MSG_E_NLOST,
2476 _("time"), sh.srvtime.name);
2477 }
2478 sl_close_fd(FIL__, __LINE__, fd);
2479 }
2480 else
2481 {
2482 sh_error_handle ((-1), FIL__, __LINE__, error_num,
2483 MSG_E_NET, errmsg, error_call,
2484 _("time"), sh.srvtime.name);
2485 errflag = error_num;
2486 fail = 1;
2487 }
2488
2489 if (fail == 0)
2490 {
2491 unsigned long ltmp;
2492 UINT32 ttmp;
2493 memcpy(&ttmp, net_time, sizeof(UINT32)); ltmp = ttmp;
2494 time_now = ntohl(ltmp) - UNIXEPOCH;
2495 time_saved = time_now;
2496
2497 if (failerr == 1) {
2498 failerr = 0;
2499 sh_error_handle ((-1), FIL__, __LINE__, 0,
2500 MSG_E_NEST,
2501 _("time"), sh.srvtime.name);
2502 }
2503 }
2504 else
2505 {
2506 (void) time (&time_now);
2507 time_saved = 0;
2508
2509 if (failerr == 0)
2510 {
2511 failerr = 1;
2512 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2513 MSG_SRV_FAIL,
2514 _("time"), sh.srvtime.name);
2515 }
2516 }
2517 end:
2518 ; /* 'label at end of compound statement' */
2519 }
2520 }
2521 else
2522 {
2523 time_now = thetime;
2524 }
2525
2526 /* #ifdef HAVE_NTIME */
2527#else
2528
2529 if (thetime == 0)
2530 {
2531 (void) time (&time_now);
2532 }
2533 else
2534 {
2535 time_now = thetime;
2536 }
2537
2538 /* #ifdef HAVE_NTIME */
2539#endif
2540
2541 if (time_now == (-1) )
2542 {
2543 sl_strlcpy(buffer, _(deftime), len);
2544 SL_RETURN(buffer, _("sh_unix_time"));
2545 }
2546 else
2547 {
2548#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2549 time_ptr = localtime_r (&time_now, &time_tm);
2550#else
2551 time_ptr = localtime (&time_now);
2552#endif
2553 }
2554 if (time_ptr != NULL)
2555 {
2556 status = strftime (AsciiTime, sizeof(AsciiTime),
2557#ifdef SH_USE_XML
2558 _("%Y-%m-%dT%H:%M:%S%%s"),
2559#else
2560 _("[%Y-%m-%dT%H:%M:%S%%s]"),
2561#endif
2562 time_ptr);
2563
2564 sl_snprintf(buffer, len, AsciiTime, t_zone(&time_now));
2565
2566 if ( (status == 0) || (status == sizeof(AsciiTime)) )
2567 {
2568 sl_strlcpy(buffer, _(deftime), len);
2569 SL_RETURN( buffer, _("sh_unix_time"));
2570 }
2571 else
2572 {
2573 SL_RETURN(buffer, _("sh_unix_time"));
2574 }
2575 }
2576
2577 /* last resort
2578 */
2579 sl_strlcpy(buffer, _(deftime), len);
2580 SL_RETURN( buffer, _("sh_unix_time"));
2581}
2582
2583static int sh_unix_use_localtime = S_FALSE;
2584
2585/* whether to use localtime for file timestamps in logs
2586 */
2587int sh_unix_uselocaltime (const char * c)
2588{
2589 int i;
2590 SL_ENTER(_("sh_unix_uselocaltime"));
2591 i = sh_util_flagval(c, &(sh_unix_use_localtime));
2592
2593 SL_RETURN(i, _("sh_unix_uselocaltime"));
2594}
2595
2596char * sh_unix_gmttime (time_t thetime, char * buffer, size_t len)
2597{
2598
2599 int status;
2600
2601 struct tm * time_ptr;
2602#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS)
2603 struct tm time_tm;
2604#endif
2605 char AsciiTime[81]; /* GMT time */
2606#ifdef SH_USE_XML
2607 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2608#else
2609 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2610#endif
2611
2612 SL_ENTER(_("sh_unix_gmttime"));
2613
2614 if (sh_unix_use_localtime == S_FALSE)
2615 {
2616#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2617 time_ptr = gmtime_r (&thetime, &time_tm);
2618#else
2619 time_ptr = gmtime (&thetime);
2620#endif
2621 }
2622 else
2623 {
2624#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2625 time_ptr = localtime_r (&thetime, &time_tm);
2626#else
2627 time_ptr = localtime (&thetime);
2628#endif
2629 }
2630 if (time_ptr != NULL)
2631 {
2632 status = strftime (AsciiTime, 80,
2633#ifdef SH_USE_XML
2634 _("%Y-%m-%dT%H:%M:%S"),
2635#else
2636 _("[%Y-%m-%dT%H:%M:%S]"),
2637#endif
2638 time_ptr);
2639
2640 if ( (status == 0) || (status == 80) )
2641 sl_strlcpy(buffer, _(deftime), len);
2642 else
2643 sl_strlcpy(buffer, AsciiTime, len);
2644 SL_RETURN( buffer, _("sh_unix_gmttime"));
2645 }
2646
2647 /* last resort
2648 */
2649 sl_strlcpy(buffer, _(deftime), len);
2650 SL_RETURN( buffer, _("sh_unix_gmttime"));
2651}
2652
2653
2654char * sh_unix_getUIDdir (int level, uid_t uid, char * out, size_t len)
2655{
2656 struct passwd * tempres;
2657 int status = 0;
2658
2659#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2660 struct passwd pwd;
2661 char * buffer;
2662#endif
2663 char errbuf[SH_ERRBUF_SIZE];
2664
2665 SL_ENTER(_("sh_unix_getUIDdir"));
2666
2667#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2668 buffer = SH_ALLOC(SH_PWBUF_SIZE);
2669 sh_getpwuid_r(uid, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
2670#else
2671 errno = 0;
2672 tempres = sh_getpwuid(uid);
2673 status = errno;
2674#endif
2675
2676 if (tempres == NULL) {
2677 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2678 sh_error_message(status, errbuf, sizeof(errbuf)),
2679 _("getpwuid"), (long) uid, _("completely missing"));
2680#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2681 SH_FREE(buffer);
2682#endif
2683 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2684 }
2685
2686 if (tempres->pw_dir != NULL) {
2687 sl_strlcpy(out, tempres->pw_dir, len);
2688#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2689 SH_FREE(buffer);
2690#endif
2691 SL_RETURN( out, _("sh_unix_getUIDdir"));
2692 } else {
2693 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2694 sh_error_message(status, errbuf, sizeof(errbuf)),
2695 _("getpwuid"), (long) uid, _("pw_dir"));
2696#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2697 SH_FREE(buffer);
2698#endif
2699 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2700 }
2701}
2702
2703/* ------------------- Caching ----------------*/
2704#include "zAVLTree.h"
2705
2706#define CACHE_GID 0
2707#define CACHE_UID 1
2708
2709struct user_id {
2710 char * name;
2711 uid_t id;
2712 struct user_id * next;
2713};
2714
2715static struct user_id * uid_list = NULL;
2716static struct user_id * gid_list = NULL;
2717
2718SH_MUTEX_STATIC(mutex_cache, PTHREAD_MUTEX_INITIALIZER);
2719
2720static void sh_userid_free(struct user_id * item)
2721{
2722 while (item)
2723 {
2724 struct user_id * user = item;
2725 item = item->next;
2726
2727 SH_FREE(user->name);
2728 SH_FREE(user);
2729 }
2730 return;
2731}
2732
2733void sh_userid_destroy ()
2734{
2735 struct user_id * tmp_uid;
2736 struct user_id * tmp_gid;
2737
2738 SH_MUTEX_LOCK_UNSAFE(mutex_cache);
2739 tmp_gid = gid_list;
2740 gid_list = NULL;
2741 tmp_uid = uid_list;
2742 uid_list = NULL;
2743 SH_MUTEX_UNLOCK_UNSAFE(mutex_cache);
2744
2745 sh_userid_free(tmp_uid);
2746 sh_userid_free(tmp_gid);
2747 return;
2748}
2749
2750static void sh_userid_additem(struct user_id * list, struct user_id * item)
2751{
2752 if (list)
2753 {
2754 while (list && list->next)
2755 list = list->next;
2756 list->next = item;
2757 }
2758 return;
2759}
2760
2761static void sh_userid_add(uid_t id, char * username, int which)
2762{
2763 size_t len;
2764 struct user_id * user = SH_ALLOC(sizeof(struct user_id));
2765
2766 if (username)
2767 len = strlen(username) + 1;
2768 else
2769 len = 1;
2770
2771 user->name = SH_ALLOC(len);
2772 user->id = id;
2773 if (username)
2774 sl_strlcpy(user->name, username, len);
2775 else
2776 user->name[0] = '\0';
2777 user->next = NULL;
2778
2779 SH_MUTEX_LOCK(mutex_cache);
2780 if (which == CACHE_UID)
2781 {
2782 if (!uid_list)
2783 uid_list = user;
2784 else
2785 sh_userid_additem(uid_list, user);
2786 }
2787 else
2788 {
2789 if (!gid_list)
2790 gid_list = user;
2791 else
2792 sh_userid_additem(gid_list, user);
2793 }
2794 SH_MUTEX_UNLOCK(mutex_cache);
2795
2796 return;
2797}
2798
2799static char * sh_userid_search(struct user_id * list, uid_t id)
2800{
2801 while (list)
2802 {
2803 if (list->id == id)
2804 return list->name;
2805 list = list->next;
2806 }
2807 return NULL;
2808}
2809
2810static char * sh_userid_get (uid_t id, int which, char * out, size_t len)
2811{
2812 char * user = NULL;
2813
2814 SH_MUTEX_LOCK_UNSAFE(mutex_cache);
2815 if (which == CACHE_UID)
2816 user = sh_userid_search(uid_list, id);
2817 else
2818 user = sh_userid_search(gid_list, id);
2819 if (user)
2820 {
2821 sl_strlcpy(out, user, len);
2822 user = out;
2823 }
2824 SH_MUTEX_UNLOCK_UNSAFE(mutex_cache);
2825
2826 return user;
2827}
2828
2829/* --------- end caching code --------- */
2830
2831#include "sh_subuid.h"
2832
2833char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len)
2834{
2835 struct passwd * tempres;
2836#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2837 struct passwd pwd;
2838 char * buffer;
2839#endif
2840 int status = 0;
2841 char errbuf[SH_ERRBUF_SIZE];
2842 char * tmp;
2843
2844 SL_ENTER(_("sh_unix_getUIDname"));
2845
2846 tmp = sh_userid_get(uid, CACHE_UID, out, len);
2847
2848 if (tmp)
2849 {
2850 if (tmp[0] != '\0')
2851 {
2852 SL_RETURN( out, _("sh_unix_getUIDname"));
2853 }
2854 else
2855 {
2856 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2857 }
2858 }
2859
2860#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2861 buffer = SH_ALLOC(SH_PWBUF_SIZE);
2862 sh_getpwuid_r(uid, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
2863#else
2864 errno = 0;
2865 tempres = sh_getpwuid(uid);
2866 status = errno;
2867#endif
2868
2869 /* case 1: we have it
2870 */
2871 if (tempres && tempres->pw_name != NULL)
2872 {
2873
2874 sl_strlcpy(out, tempres->pw_name, len);
2875 sh_userid_add(uid, out, CACHE_UID);
2876
2877#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2878 SH_FREE(buffer);
2879#endif
2880
2881 SL_RETURN( out, _("sh_unix_getUIDname"));
2882 }
2883
2884#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2885 SH_FREE(buffer);
2886#endif
2887
2888 if (tempres == NULL)
2889 {
2890 char * pwname = sh_get_subuid ((unsigned long) uid);
2891
2892 if (pwname)
2893 {
2894 sl_strlcpy(out, pwname, len);
2895 sh_userid_add(uid, out, CACHE_UID);
2896 SL_RETURN( out, _("sh_unix_getUIDname"));
2897 }
2898
2899 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2900 sh_error_message(status, errbuf, sizeof(errbuf)),
2901 _("getpwuid"), (long) uid, _("completely missing"));
2902 sh_userid_add(uid, NULL, CACHE_UID);
2903 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2904 }
2905
2906
2907 /* getwpuid returns struct, but no pw_name
2908 */
2909 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2910 sh_error_message(status, errbuf, sizeof(errbuf)),
2911 _("getpwuid"), (long) uid, _("pw_user"));
2912 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2913}
2914
2915char * sh_unix_getGIDname (int level, gid_t gid, char * out, size_t len)
2916{
2917 struct group * tempres;
2918 int status = 0;
2919
2920#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2921 struct group grp;
2922 char * buffer;
2923#endif
2924 char errbuf[SH_ERRBUF_SIZE];
2925 char * tmp;
2926
2927 SL_ENTER(_("sh_unix_getGIDname"));
2928
2929 tmp = sh_userid_get((uid_t)gid, CACHE_GID, out, len);
2930
2931 if (tmp)
2932 {
2933 if (tmp[0] != '\0')
2934 {
2935 SL_RETURN( out, _("sh_unix_getGIDname"));
2936 }
2937 else
2938 {
2939 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2940 }
2941 }
2942
2943#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2944 buffer = SH_ALLOC(SH_GRBUF_SIZE);
2945 status = sh_getgrgid_r(gid, &grp, buffer, SH_GRBUF_SIZE, &tempres);
2946#else
2947 errno = 0;
2948 tempres = sh_getgrgid(gid);
2949 status = errno;
2950#endif
2951
2952 if (status == ERANGE)
2953 {
2954 static int seen = 0;
2955
2956 if (seen == 0)
2957 {
2958 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2959 sh_error_message(status, errbuf, sizeof(errbuf)),
2960 _("getgrgid"), (long) gid, _("line too long in group entry"));
2961 ++seen;
2962 }
2963
2964#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2965 SH_FREE(buffer);
2966#endif
2967
2968 sh_userid_add(gid, NULL, CACHE_GID);
2969 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2970 }
2971
2972 if (tempres && tempres->gr_name != NULL)
2973 {
2974
2975 sl_strlcpy(out, tempres->gr_name, len);
2976 sh_userid_add((uid_t)gid, out, CACHE_GID);
2977
2978#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2979 SH_FREE(buffer);
2980#endif
2981
2982 SL_RETURN( out, _("sh_unix_getGIDname"));
2983 }
2984
2985#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2986 SH_FREE(buffer);
2987#endif
2988
2989 if (tempres == NULL)
2990 {
2991 char * grname = sh_get_subgid ((unsigned long) gid);
2992
2993 if (grname)
2994 {
2995 sl_strlcpy(out, grname, len);
2996 sh_userid_add((uid_t)gid, out, CACHE_GID);
2997 SL_RETURN( out, _("sh_unix_getGIDname"));
2998 }
2999
3000 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
3001 sh_error_message(status, errbuf, sizeof(errbuf)),
3002 _("getgrgid"), (long) gid, _("completely missing"));
3003 sh_userid_add(gid, NULL, CACHE_GID);
3004 SL_RETURN( NULL, _("sh_unix_getGIDname"));
3005 }
3006
3007 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
3008 sh_error_message(status, errbuf, sizeof(errbuf)),
3009 _("getgrgid"), (long) gid, _("gr_name"));
3010 SL_RETURN( NULL, _("sh_unix_getGIDname"));
3011}
3012
3013int sh_unix_getUser ()
3014{
3015 char * p;
3016 uid_t seuid, sruid;
3017 char user[USER_MAX];
3018 char dir[SH_PATHBUF];
3019
3020 SL_ENTER(_("sh_unix_getUser"));
3021
3022 seuid = geteuid();
3023
3024 sh.effective.uid = seuid;
3025
3026 p = sh_unix_getUIDdir (SH_ERR_ERR, seuid, dir, sizeof(dir));
3027
3028 if (p == NULL)
3029 SL_RETURN((-1), _("sh_unix_getUser"));
3030 else
3031 {
3032 if (sl_strlen(p) >= SH_PATHBUF) {
3033 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
3034 _("getpwuid"), (long) seuid, _("pw_home"));
3035 SL_RETURN((-1), _("sh_unix_getUser"));
3036 } else {
3037 sl_strlcpy ( sh.effective.home, p, SH_PATHBUF);
3038 }
3039 }
3040
3041 sruid = getuid();
3042
3043 sh.real.uid = sruid;
3044
3045 p = sh_unix_getUIDname (SH_ERR_ERR, sruid, user, sizeof(user));
3046 if (p == NULL)
3047 SL_RETURN((-1), _("sh_unix_getUser"));
3048 else
3049 {
3050 if (sl_strlen(p) >= USER_MAX) {
3051 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
3052 _("getpwuid"), (long) sruid, _("pw_user"));
3053 SL_RETURN((-1), _("sh_unix_getUser"));
3054 } else {
3055 sl_strlcpy ( sh.real.user, p, USER_MAX);
3056 }
3057 }
3058
3059 p = sh_unix_getUIDdir (SH_ERR_ERR, sruid, dir, sizeof(dir));
3060
3061 if (p == NULL)
3062 SL_RETURN((-1), _("sh_unix_getUser"));
3063 else
3064 {
3065 if (sl_strlen(p) >= SH_PATHBUF) {
3066 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
3067 _("getpwuid"), (long) sruid, _("pw_home"));
3068 SL_RETURN((-1), _("sh_unix_getUser"));
3069 } else {
3070 sl_strlcpy ( sh.real.home, p, SH_PATHBUF);
3071 }
3072 }
3073
3074 SL_RETURN((0), _("sh_unix_getUser"));
3075
3076 /* notreached */
3077}
3078
3079/* return >0 on success, -1 on EOF */
3080int sh_unix_getline (SL_TICKET fd, char * line, int sizeofline)
3081{
3082 register int count;
3083 register int n = 0;
3084 char c;
3085
3086 SL_ENTER(_("sh_unix_getline"));
3087
3088 if (sizeofline < 2) {
3089 line[0] = '\0';
3090 SL_RETURN((0), _("sh_unix_getline"));
3091 }
3092
3093 --sizeofline;
3094
3095 while (n < sizeofline) {
3096
3097 count = sl_read (fd, &c, 1);
3098
3099 /* end of file
3100 */
3101 if (count < 1) {
3102 line[n] = '\0';
3103 n = -1;
3104 break;
3105 }
3106
3107 if (/* c != '\0' && */ c != '\n') {
3108 line[n] = c;
3109 ++n;
3110 } else if (c == '\n') {
3111 if (n > 0) {
3112 line[n] = '\0';
3113 break;
3114 } else {
3115 line[n] = '\n'; /* get newline only if only char on line */
3116 ++n;
3117 line[n] = '\0';
3118 break;
3119 }
3120 } else {
3121 line[n] = '\0';
3122 break;
3123 }
3124
3125 }
3126
3127
3128 line[sizeofline] = '\0'; /* make sure line is terminated */
3129 SL_RETURN((n), _("sh_unix_getline"));
3130}
3131
3132
3133#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
3134
3135/**************************************************************
3136 *
3137 * --- FILE INFO ---
3138 *
3139 **************************************************************/
3140
3141#if (defined(__linux__) && (defined(HAVE_LINUX_EXT2_FS_H) || defined(HAVE_EXT2FS_EXT2_FS_H))) || defined(HAVE_STAT_FLAGS)
3142
3143#if defined(__linux__)
3144
3145/* --- Determine ext2fs file attributes. ---
3146 */
3147#include <sys/ioctl.h>
3148#if defined(HAVE_EXT2FS_EXT2_FS_H)
3149#include <ext2fs/ext2_fs.h>
3150#else
3151#include <linux/ext2_fs.h>
3152#endif
3153
3154/* __linux__ includes */
3155#endif
3156
3157static
3158int sh_unix_getinfo_attr (char * name,
3159 unsigned long * flags,
3160 char * c_attr,
3161 int fd, struct stat * buf)
3162{
3163
3164/* TAKEN FROM:
3165 *
3166 * lsattr.c - List file attributes on an ext2 file system
3167 *
3168 * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
3169 * Laboratoire MASI, Institut Blaise Pascal
3170 * Universite Pierre et Marie Curie (Paris VI)
3171 *
3172 * This file can be redistributed under the terms of the GNU General
3173 * Public License
3174 */
3175
3176#ifdef HAVE_STAT_FLAGS
3177
3178 SL_ENTER(_("sh_unix_getinfo_attr"));
3179
3180 *flags = 0;
3181
3182 /* cast to void to avoid compiler warning about unused parameters */
3183 (void) fd;
3184 (void) name;
3185
3186#ifdef UF_NODUMP
3187 if (buf->st_flags & UF_NODUMP) {
3188 *flags |= UF_NODUMP;
3189 c_attr[0] = 'd';
3190 }
3191#endif
3192#ifdef UF_IMMUTABLE
3193 if (buf->st_flags & UF_IMMUTABLE) {
3194 *flags |= UF_IMMUTABLE;
3195 c_attr[1] = 'i';
3196 }
3197#endif
3198#ifdef UF_APPEND
3199 if (buf->st_flags & UF_APPEND) {
3200 *flags |= UF_APPEND;
3201 c_attr[2] = 'a';
3202 }
3203#endif
3204#ifdef UF_NOUNLINK
3205 if (buf->st_flags & UF_NOUNLINK) {
3206 *flags |= UF_NOUNLINK;
3207 c_attr[3] = 'u';
3208 }
3209#endif
3210#ifdef UF_OPAQUE
3211 if (buf->st_flags & UF_OPAQUE) {
3212 *flags |= UF_OPAQUE;
3213 c_attr[4] = 'o';
3214 }
3215#endif
3216#ifdef SF_ARCHIVED
3217 if (buf->st_flags & SF_ARCHIVED) {
3218 *flags |= SF_ARCHIVED;
3219 c_attr[5] = 'R';
3220 }
3221
3222#endif
3223#ifdef SF_IMMUTABLE
3224 if (buf->st_flags & SF_IMMUTABLE) {
3225 *flags |= SF_IMMUTABLE;
3226 c_attr[6] = 'I';
3227 }
3228#endif
3229#ifdef SF_APPEND
3230 if (buf->st_flags & SF_APPEND) {
3231 *flags |= SF_APPEND;
3232 c_attr[7] = 'A';
3233 }
3234#endif
3235#ifdef SF_NOUNLINK
3236 if (buf->st_flags & SF_NOUNLINK) {
3237 *flags |= SF_NOUNLINK;
3238 c_attr[8] = 'U';
3239 }
3240#endif
3241
3242 /* ! HAVE_STAT_FLAGS */
3243#else
3244
3245#ifdef HAVE_EXT2_IOCTLS
3246 int /* fd, */ r, f;
3247
3248 SL_ENTER(_("sh_unix_getinfo_attr"));
3249
3250 *flags = 0;
3251 (void) buf;
3252
3253 /* open() -> aud_open() R.Wichmann
3254 fd = aud_open (FIL__, __LINE__, SL_YESPRIV, name, O_RDONLY|O_NONBLOCK, 0);
3255 */
3256
3257 if (fd == -1 || name == NULL)
3258 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
3259
3260
3261 r = ioctl (fd, EXT2_IOC_GETFLAGS, &f);
3262 /* sl_close_fd (FIL__, __LINE__, fd); */
3263
3264 if (r == -1)
3265 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
3266
3267 if (f == 0)
3268 SL_RETURN(0, _("sh_unix_getinfo_attr"));
3269
3270 *flags = f;
3271
3272/* ! HAVE_EXT2_IOCTLS */
3273#else
3274
3275 SL_ENTER(_("sh_unix_getinfo_attr"));
3276
3277 *flags = 0; /* modified by R.Wichmann */
3278
3279/* ! HAVE_EXT2_IOCTLS */
3280#endif
3281/*
3282 * END
3283 *
3284 * lsattr.c - List file attributes on an ext2 file system
3285 */
3286
3287 if (*flags == 0)
3288 goto theend;
3289
3290#ifdef EXT2_SECRM_FL
3291 if ( (*flags & EXT2_SECRM_FL) != 0 ) c_attr[0] = 's';
3292#endif
3293#ifdef EXT2_UNRM_FL
3294 if ( (*flags & EXT2_UNRM_FL) != 0 ) c_attr[1] = 'u';
3295#endif
3296#ifdef EXT2_SYNC_FL
3297 if ( (*flags & EXT2_SYNC_FL) != 0 ) c_attr[2] = 'S';
3298#endif
3299#ifdef EXT2_IMMUTABLE_FL
3300 if ( (*flags & EXT2_IMMUTABLE_FL) != 0) c_attr[3] = 'i';
3301#endif
3302#ifdef EXT2_APPEND_FL
3303 if ( (*flags & EXT2_APPEND_FL) != 0 ) c_attr[4] = 'a';
3304#endif
3305#ifdef EXT2_NODUMP_FL
3306 if ( (*flags & EXT2_NODUMP_FL) != 0 ) c_attr[5] = 'd';
3307#endif
3308#ifdef EXT2_NOATIME_FL
3309 if ( (*flags & EXT2_NOATIME_FL) != 0) c_attr[6] = 'A';
3310#endif
3311#ifdef EXT2_COMPR_FL
3312 if ( (*flags & EXT2_COMPR_FL) != 0 ) c_attr[7] = 'c';
3313#endif
3314
3315#ifdef EXT2_TOPDIR_FL
3316 if ( (*flags & EXT2_TOPDIR_FL) != 0 ) c_attr[8] = 'T';
3317#endif
3318#ifdef EXT2_DIRSYNC_FL
3319 if ( (*flags & EXT2_DIRSYNC_FL) != 0 ) c_attr[9] = 'D';
3320#endif
3321#ifdef EXT2_NOTAIL_FL
3322 if ( (*flags & EXT2_NOTAIL_FL) != 0 ) c_attr[10] = 't';
3323#endif
3324#ifdef EXT2_JOURNAL_DATA_FL
3325 if ( (*flags & EXT2_JOURNAL_DATA_FL) != 0) c_attr[11] = 'j';
3326#endif
3327
3328 theend:
3329 /* ext2 */
3330#endif
3331
3332 c_attr[12] = '\0';
3333
3334 SL_RETURN(0, _("sh_unix_getinfo_attr"));
3335}
3336
3337/* defined(__linux__) || defined(HAVE_STAT_FLAGS) */
3338#endif
3339
3340/* determine file type
3341 */
3342static
3343int sh_unix_getinfo_type (struct stat * buf,
3344 ShFileType * type,
3345 char * c_mode)
3346{
3347 SL_ENTER(_("sh_unix_getinfo_type"));
3348
3349 if ( S_ISREG(buf->st_mode) ) {
3350 (*type) = SH_FILE_REGULAR;
3351 c_mode[0] = '-';
3352 }
3353 else if ( S_ISLNK(buf->st_mode) ) {
3354 (*type) = SH_FILE_SYMLINK;
3355 c_mode[0] = 'l';
3356 }
3357 else if ( S_ISDIR(buf->st_mode) ) {
3358 (*type) = SH_FILE_DIRECTORY;
3359 c_mode[0] = 'd';
3360 }
3361 else if ( S_ISCHR(buf->st_mode) ) {
3362 (*type) = SH_FILE_CDEV;
3363 c_mode[0] = 'c';
3364 }
3365 else if ( S_ISBLK(buf->st_mode) ) {
3366 (*type) = SH_FILE_BDEV;
3367 c_mode[0] = 'b';
3368 }
3369 else if ( S_ISFIFO(buf->st_mode) ) {
3370 (*type) = SH_FILE_FIFO;
3371 c_mode[0] = '|';
3372 }
3373 else if ( S_ISSOCK(buf->st_mode) ) {
3374 (*type) = SH_FILE_SOCKET;
3375 c_mode[0] = 's';
3376 }
3377 else if ( S_ISDOOR(buf->st_mode) ) {
3378 (*type) = SH_FILE_DOOR;
3379 c_mode[0] = 'D';
3380 }
3381 else if ( S_ISPORT(buf->st_mode) ) {
3382 (*type) = SH_FILE_PORT;
3383 c_mode[0] = 'P';
3384 }
3385 else {
3386 (*type) = SH_FILE_UNKNOWN;
3387 c_mode[0] = '?';
3388 }
3389
3390 SL_RETURN(0, _("sh_unix_getinfo_type"));
3391}
3392
3393int sh_unix_get_ftype(char * fullpath)
3394{
3395 char c_mode[CMODE_SIZE];
3396 struct stat buf;
3397 ShFileType type;
3398 int res;
3399
3400 SL_ENTER(_("sh_unix_get_ftype"));
3401
3402 res = retry_lstat(FIL__, __LINE__, fullpath, &buf);
3403
3404 if (res < 0)
3405 SL_RETURN(SH_FILE_UNKNOWN, _("sh_unix_getinfo_type"));
3406
3407 sh_unix_getinfo_type (&buf, &type, c_mode);
3408
3409 SL_RETURN(type, _("sh_unix_get_ftype"));
3410}
3411
3412
3413static
3414int sh_unix_getinfo_mode (struct stat *buf,
3415 unsigned int * mode,
3416 char * c_mode)
3417{
3418
3419 SL_ENTER(_("sh_unix_getinfo_mode"));
3420
3421 (*mode) = buf->st_mode;
3422
3423 /* make 'ls'-like string */
3424
3425 if ( (buf->st_mode & S_IRUSR) != 0 ) c_mode[1] = 'r';
3426 if ( (buf->st_mode & S_IWUSR) != 0 ) c_mode[2] = 'w';
3427 if ( (buf->st_mode & S_IXUSR) != 0 ) {
3428 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 's';
3429 else c_mode[3] = 'x';
3430 } else {
3431 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 'S';
3432 }
3433
3434 if ( (buf->st_mode & S_IRGRP) != 0 ) c_mode[4] = 'r';
3435 if ( (buf->st_mode & S_IWGRP) != 0 ) c_mode[5] = 'w';
3436 if ( (buf->st_mode & S_IXGRP) != 0 ) {
3437 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 's';
3438 else c_mode[6] = 'x';
3439 } else {
3440 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 'S';
3441 }
3442
3443 if ( (buf->st_mode & S_IROTH) != 0 ) c_mode[7] = 'r';
3444 if ( (buf->st_mode & S_IWOTH) != 0 ) c_mode[8] = 'w';
3445#ifdef S_ISVTX /* not POSIX */
3446 if ( (buf->st_mode & S_IXOTH) != 0 ) {
3447 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 't';
3448 else c_mode[9] = 'x';
3449 } else {
3450 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 'T';
3451 }
3452#else
3453 if ( (buf->st_mode & S_IXOTH) != 0 ) c_mode[9] = 'x';
3454#endif
3455
3456 SL_RETURN(0, _("sh_unix_getinfo_mode"));
3457}
3458
3459
3460long IO_Limit = 0;
3461
3462void sh_unix_io_pause ()
3463{
3464 long runtime;
3465 float someval;
3466 unsigned long sometime;
3467
3468 if (IO_Limit == 0)
3469 {
3470 return;
3471 }
3472 else
3473 {
3474 runtime = (long) (time(NULL) - sh.statistics.time_start);
3475
3476 if (runtime > 0 && (long)(sh.statistics.bytes_hashed/runtime) > IO_Limit)
3477 {
3478 someval = sh.statistics.bytes_hashed - (IO_Limit * runtime);
3479 someval /= (float) IO_Limit;
3480 if (someval < 1.0)
3481 {
3482 someval *= 1000; /* milliseconds in a second */
3483 sometime = (unsigned long) someval;
3484 retry_msleep(0, sometime);
3485 }
3486 else
3487 {
3488 sometime = (unsigned long) someval;
3489 retry_msleep (sometime, 0);
3490 }
3491 }
3492 }
3493 return;
3494}
3495
3496int sh_unix_set_io_limit (const char * c)
3497{
3498 long val;
3499
3500 SL_ENTER(_("sh_unix_set_io_limit"));
3501
3502 val = strtol (c, (char **)NULL, 10);
3503 if (val < 0)
3504 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
3505 _("set I/O limit"), c);
3506
3507 val = (val < 0 ? 0 : val);
3508
3509 IO_Limit = val * 1024;
3510 SL_RETURN( 0, _("sh_unix_set_io_limit"));
3511}
3512
3513/* obtain file info
3514 */
3515extern int flag_err_debug;
3516
3517#include "sh_ignore.h"
3518
3519int sh_unix_checksum_size (char * filename, off_t size, int is_max_size,
3520 char * fileHash, int alert_timeout, SL_TICKET fd, unsigned long mask)
3521{
3522 file_type * tmpFile;
3523 int status;
3524
3525 SL_ENTER(_("sh_unix_checksum_size"));
3526
3527 tmpFile = SH_ALLOC(sizeof(file_type));
3528 tmpFile->link_path = NULL;
3529
3530 if (sh.flag.checkSum != SH_CHECK_INIT)
3531 {
3532 /* lookup file in database */
3533 if (is_max_size == S_TRUE) {
3534 status = sh_hash_get_it (filename, tmpFile, NULL);
3535 if ((status != 0) || (tmpFile->size > size)) {
3536 goto out;
3537 }
3538 } else {
3539 tmpFile->size = size;
3540 }
3541 }
3542 else
3543 {
3544 tmpFile->size = size;
3545 }
3546
3547 /* if last <= current get checksum */
3548 if (tmpFile->size <= size)
3549 {
3550 char hashbuf[KEYBUF_SIZE];
3551 UINT64 local_length = (UINT64) (tmpFile->size < 0 ? 0 : tmpFile->size);
3552 if (sh.flag.opts == S_TRUE) sh_tiger_set_hashtype_mask(mask);
3553 sl_strlcpy(fileHash,
3554 sh_tiger_generic_hash (filename, fd, &(local_length),
3555 alert_timeout, hashbuf, sizeof(hashbuf)),
3556 KEY_LEN+1);
3557
3558 /* return */
3559 if (tmpFile->link_path) SH_FREE(tmpFile->link_path);
3560 SH_FREE(tmpFile);
3561 SL_RETURN( 0, _("sh_unix_checksum_size"));
3562 }
3563
3564 out:
3565 if (tmpFile->link_path) SH_FREE(tmpFile->link_path);
3566 SH_FREE(tmpFile);
3567 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3568 SL_RETURN( -1, _("sh_unix_checksum_size"));
3569}
3570
3571/********************************************************
3572 * Search rotated logfile
3573 */
3574extern char * sh_rotated_log_search(const char * path, struct stat * buf);
3575
3576int sh_check_rotated_log (const char * path,
3577 UINT64 old_size, UINT64 old_inode, const char * old_hash, unsigned long mask)
3578{
3579 struct stat obuf;
3580 UINT64 length_nolim = TIGER_NOLIM;
3581 int retval = S_FALSE;
3582
3583 if (old_size != length_nolim)
3584 {
3585 char hashbuf[KEYBUF_SIZE];
3586 char * rotated_file;
3587
3588 obuf.st_ino = old_inode;
3589 rotated_file = sh_rotated_log_search(path, &obuf);
3590
3591 if (rotated_file && (0 != strcmp(path, rotated_file)))
3592 {
3593 SL_TICKET fd = sl_open_fastread (FIL__, __LINE__, rotated_file, SL_YESPRIV);
3594 if (!SL_ISERROR(fd))
3595 {
3596 sh_unix_checksum_size (rotated_file, old_size, S_FALSE,
3597 hashbuf, 120 /* alert_timeout */, fd, mask);
3598
3599 sl_close(fd);
3600
3601 if (strncmp (old_hash, hashbuf, KEY_LEN) == 0) {
3602 retval = S_TRUE;
3603 }
3604 }
3605 SH_FREE(rotated_file);
3606 }
3607 }
3608 return retval;
3609}
3610
3611
3612int sh_unix_check_selinux = S_FALSE;
3613int sh_unix_check_acl = S_FALSE;
3614
3615#ifdef USE_ACL
3616
3617#include <sys/acl.h>
3618static char * sh_unix_getinfo_acl (char * path, int fd, struct stat * buf)
3619{
3620 /* system.posix_acl_access, system.posix_acl_default
3621 */
3622 char * out = NULL;
3623 char * collect = NULL;
3624 char * tmp;
3625 char * out_compact;
3626 ssize_t len;
3627 acl_t result;
3628
3629 SL_ENTER(_("sh_unix_getinfo_acl"));
3630
3631 result = (fd == -1) ?
3632 acl_get_file (path, ACL_TYPE_ACCESS) :
3633 acl_get_fd (fd);
3634
3635 if (result)
3636 {
3637 out = acl_to_text (result, &len);
3638 if (out && (len > 0)) {
3639 out_compact = sh_util_acl_compact (out, len);
3640 acl_free(out);
3641 if (out_compact)
3642 {
3643 collect = sh_util_strconcat (_("acl_access:"), out_compact, NULL);
3644 SH_FREE(out_compact);
3645 }
3646 }
3647 acl_free(result);
3648 }
3649
3650
3651 if ( S_ISDIR(buf->st_mode) )
3652 {
3653 result = acl_get_file (path, ACL_TYPE_DEFAULT);
3654
3655 if (result)
3656 {
3657 out = acl_to_text (result, &len);
3658 if (out && (len > 0)) {
3659 out_compact = sh_util_acl_compact (out, len);
3660 acl_free(out);
3661 if (out_compact) {
3662 if (collect) {
3663 tmp = sh_util_strconcat (_("acl_default:"),
3664 out_compact, ":", collect, NULL);
3665 SH_FREE(collect);
3666 }
3667 else {
3668 tmp = sh_util_strconcat (_("acl_default:"), out_compact, NULL);
3669 }
3670 SH_FREE(out_compact);
3671 collect = tmp;
3672 }
3673 }
3674 acl_free(result);
3675 }
3676 }
3677
3678 SL_RETURN((collect),_("sh_unix_getinfo_acl"));
3679}
3680#endif
3681
3682#ifdef USE_XATTR
3683
3684#include <attr/xattr.h>
3685static char * sh_unix_getinfo_xattr_int (char * path, int fd, char * name)
3686{
3687 char * out = NULL;
3688 char * tmp = NULL;
3689 size_t size = 256;
3690 ssize_t result;
3691
3692 SL_ENTER(_("sh_unix_getinfo_xattr_int"));
3693
3694 out = SH_ALLOC(size);
3695
3696 result = (fd == -1) ?
3697 lgetxattr (path, name, out, size-1) :
3698 fgetxattr (fd, name, out, size-1);
3699
3700 if (result == -1 && errno == ERANGE)
3701 {
3702 SH_FREE(out);
3703 result = (fd == -1) ?
3704 lgetxattr (path, name, NULL, 0) :
3705 fgetxattr (fd, name, NULL, 0);
3706 size = result + 1;
3707 out = SH_ALLOC(size);
3708 result = (fd == -1) ?
3709 lgetxattr (path, name, out, size-1) :
3710 fgetxattr (fd, name, out, size-1);
3711 }
3712
3713 if ((result > 0) && ((size_t)result < size))
3714 {
3715 out[size-1] = '\0';
3716 tmp = out;
3717 }
3718 else
3719 {
3720 SH_FREE(out);
3721 }
3722
3723 SL_RETURN((tmp),_("sh_unix_getinfo_xattr_int"));
3724}
3725
3726
3727static char * sh_unix_getinfo_xattr (char * path, int fd, struct stat * buf)
3728{
3729 /* system.posix_acl_access, system.posix_acl_default, security.selinux
3730 */
3731 char * tmp;
3732 char * out = NULL;
3733 char * collect = NULL;
3734
3735 SL_ENTER(_("sh_unix_getinfo_xattr"));
3736
3737#ifdef USE_ACL
3738 /*
3739 * we need the acl_get_fd/acl_get_file functions, getxattr will only
3740 * yield the raw bytes
3741 */
3742 if (sh_unix_check_acl == S_TRUE)
3743 {
3744 out = sh_unix_getinfo_acl(path, fd, buf);
3745
3746 if (out)
3747 {
3748 collect = out;
3749 }
3750 }
3751#else
3752 (void) buf;
3753#endif
3754
3755 if (sh_unix_check_selinux == S_TRUE)
3756 {
3757 out = sh_unix_getinfo_xattr_int(path, fd, _("security.selinux"));
3758
3759 if (out)
3760 {
3761 if (collect) {
3762 tmp = sh_util_strconcat(_("selinux:"), out, ":", collect, NULL);
3763 SH_FREE(collect);
3764 }
3765 else {
3766 tmp = sh_util_strconcat(_("selinux:"), out, NULL);
3767 }
3768 SH_FREE(out);
3769 collect = tmp;
3770 }
3771 }
3772
3773 SL_RETURN((collect),_("sh_unix_getinfo_xattr"));
3774}
3775#endif
3776
3777#ifdef USE_XATTR
3778int sh_unix_setcheckselinux (const char * c)
3779{
3780 int i;
3781 SL_ENTER(_("sh_unix_setcheckselinux"));
3782 i = sh_util_flagval(c, &(sh_unix_check_selinux));
3783
3784 SL_RETURN(i, _("sh_unix_setcheckselinux"));
3785}
3786#endif
3787
3788#ifdef USE_ACL
3789int sh_unix_setcheckacl (const char * c)
3790{
3791 int i;
3792 SL_ENTER(_("sh_unix_setcheckacl"));
3793 i = sh_util_flagval(c, &(sh_unix_check_acl));
3794
3795 SL_RETURN(i, _("sh_unix_setcheckacl"));
3796}
3797#endif
3798
3799#ifdef HAVE_LIBZ
3800#include <zlib.h>
3801#endif
3802
3803
3804static void * sh_dummy_filename;
3805void * sh_dummy_tmp;
3806void * sh_dummy_tmp2;
3807
3808int sh_unix_getinfo (int level, const char * filename, file_type * theFile,
3809 char * fileHash, int policy)
3810{
3811 char timestr[81];
3812 long runtim;
3813 struct stat buf;
3814 struct stat lbuf;
3815 struct stat fbuf;
3816 volatile int stat_return;
3817 volatile int stat_errno = 0;
3818
3819 ShFileType type;
3820 unsigned int mode;
3821 char * tmp;
3822 char * tmp2;
3823
3824 char * linknamebuf;
3825 volatile int linksize;
3826
3827 extern int get_the_fd (SL_TICKET ticket);
3828
3829 volatile SL_TICKET rval_open;
3830 volatile int err_open = 0;
3831
3832 volatile int fd;
3833 volatile int fstat_return;
3834 volatile int fstat_errno = 0;
3835 volatile int try = 0;
3836
3837 sh_string * content = NULL;
3838
3839 time_t tend;
3840 time_t tstart;
3841
3842
3843 char * path = NULL;
3844
3845 volatile int alert_timeout = 120;
3846
3847 path = theFile->fullpath;
3848
3849 SL_ENTER(_("sh_unix_getinfo"));
3850
3851 if (!MODI_INITIALIZED(theFile->check_flags))
3852 {
3853 tmp2 = sh_util_safe_name (theFile->fullpath);
3854 SH_MUTEX_LOCK(mutex_thread_nolog);
3855 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_SUBGPATH,
3856 _("Uninitialized check mask"), _("sh_unix_getinfo"),
3857 tmp2);
3858 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3859 SH_FREE(tmp2);
3860 SL_RETURN((-1),_("sh_unix_getinfo"));
3861 }
3862
3863 /* Take the address to keep gcc from putting it into a register.
3864 * Avoids the 'clobbered by longjmp' warning.
3865 */
3866 sh_dummy_filename = (void *) &filename;
3867 sh_dummy_tmp = (void *) &tmp;
3868 sh_dummy_tmp2 = (void *) &tmp2;
3869
3870 /* --- Stat the file, and get checksum. ---
3871 */
3872 tstart = time(NULL);
3873
3874 stat_return = retry_lstat (FIL__, __LINE__,
3875 path /* theFile->fullpath */, &buf);
3876
3877 if (stat_return)
3878 stat_errno = errno;
3879
3880 theFile->link_path = NULL;
3881
3882 try_again:
3883
3884 fd = -1;
3885 fstat_return = -1;
3886 rval_open = -1;
3887
3888 if (stat_return == 0 && S_ISREG(buf.st_mode))
3889 {
3890 rval_open = sl_open_fastread (FIL__, __LINE__,
3891 path /* theFile->fullpath */, SL_YESPRIV);
3892 if (SL_ISERROR(rval_open))
3893 {
3894 char * stale = sl_check_stale();
3895
3896 if (stale)
3897 {
3898 SH_MUTEX_LOCK(mutex_thread_nolog);
3899 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, err_open, MSG_E_SUBGEN,
3900 stale, _("sh_unix_getinfo_open"));
3901 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3902 }
3903
3904 if (errno == EBADF && try == 0) /* obsolete, but we keep this, just in case */
3905 {
3906 ++try;
3907 goto try_again;
3908 }
3909 err_open = errno;
3910 }
3911
3912 alert_timeout = 120; /* this is per 8K block now ! */
3913
3914 if (path[1] == 'p' && path[5] == '/' && path[2] == 'r' &&
3915 path[3] == 'o' && path[4] == 'c' && path[0] == '/')
3916 {
3917 /* seven is magic */
3918 alert_timeout = 7;
3919 }
3920
3921 fd = get_the_fd(rval_open);
3922 }
3923
3924 tend = time(NULL);
3925
3926 /* An unprivileged user may slow lstat/open to a crawl
3927 * with clever path/symlink setup
3928 */
3929 if ((tend - tstart) > (time_t) /* 60 */ 6)
3930 {
3931 tmp2 = sh_util_safe_name (theFile->fullpath);
3932 SH_MUTEX_LOCK(mutex_thread_nolog);
3933 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_TOOLATE,
3934 (long)(tend - tstart), tmp2);
3935 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3936 SH_FREE(tmp2);
3937 }
3938
3939 if (fd >= 0)
3940 {
3941 fstat_return = retry_fstat (FIL__, __LINE__, fd, &fbuf);
3942
3943 if (fstat_return)
3944 {
3945 char * stale;
3946
3947 fstat_errno = errno;
3948
3949 stale = sl_check_stale();
3950
3951 if (stale)
3952 {
3953 SH_MUTEX_LOCK(mutex_thread_nolog);
3954 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, fstat_errno,
3955 MSG_E_SUBGEN,
3956 stale, _("sh_unix_getinfo_fstat"));
3957 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3958 }
3959
3960 if (try == 0) /* obsolete, but we keep this, just in case */
3961 {
3962 ++try;
3963 sl_close(rval_open);
3964 goto try_again;
3965 }
3966 }
3967 }
3968 else
3969 {
3970 fd = -1;
3971 }
3972
3973
3974 /* --- case 1: lstat failed ---
3975 */
3976 if (stat_return != 0)
3977 {
3978 stat_return = errno;
3979 if (!SL_ISERROR(rval_open))
3980 sl_close(rval_open);
3981 if (sh.flag.checkSum == SH_CHECK_INIT ||
3982 (sh_hash_have_it (theFile->fullpath) >= 0 &&
3983 (!SH_FFLAG_REPORTED_SET(theFile->file_reported))))
3984 {
3985 if (S_FALSE == sh_ignore_chk_del(theFile->fullpath)) {
3986 int flags = sh_hash_getflags (theFile->fullpath);
3987
3988 if ((flags >= 0) && (flags & SH_FFLAG_ENOENT) == 0) {
3989 char errbuf[SH_ERRBUF_SIZE];
3990 uid_t euid;
3991 (void) sl_get_euid(&euid);
3992 tmp2 = sh_util_safe_name (theFile->fullpath);
3993 SH_MUTEX_LOCK(mutex_thread_nolog);
3994 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
3995 _("lstat"),
3996 sh_error_message (stat_errno, errbuf, sizeof(errbuf)),
3997 (long) euid,
3998 tmp2);
3999 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4000 SH_FREE(tmp2);
4001 sh_hash_set_flag (theFile->fullpath, SH_FFLAG_ENOENT);
4002 }
4003 }
4004 }
4005 SL_RETURN((-1),_("sh_unix_getinfo"));
4006 }
4007
4008 /* --- case 2: not a regular file ---
4009 */
4010 else if (! S_ISREG(buf.st_mode))
4011 {
4012 if (fileHash != NULL)
4013 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4014 }
4015
4016 /* --- case 3a: a regular file, fstat ok ---
4017 */
4018 else if (fstat_return == 0 &&
4019 buf.st_mode == fbuf.st_mode &&
4020 buf.st_ino == fbuf.st_ino &&
4021 buf.st_uid == fbuf.st_uid &&
4022 buf.st_gid == fbuf.st_gid &&
4023 buf.st_dev == fbuf.st_dev )
4024 {
4025 if (fileHash != NULL)
4026 {
4027 if ((theFile->check_flags & MODI_CHK) == 0 ||
4028 sh_restrict_this(theFile->fullpath, (UINT64) fbuf.st_size,
4029 (UINT64) fbuf.st_mode, rval_open))
4030 {
4031 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4032 }
4033 else if ((theFile->check_flags & MODI_PREL) != 0 &&
4034 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
4035 alert_timeout, theFile->fullpath))
4036 {
4037 if (0 != sh_prelink_run (theFile->fullpath,
4038 fileHash, alert_timeout, theFile->check_flags))
4039 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4040 }
4041 else
4042 {
4043 char hashbuf[KEYBUF_SIZE];
4044 UINT64 length_current = TIGER_NOLIM;
4045
4046 if (MODI_TXT_ENABLED(theFile->check_flags) && fbuf.st_size < (10 * SH_TXT_MAX))
4047 {
4048 sl_init_content (rval_open, fbuf.st_size);
4049 }
4050
4051 if (sh.flag.opts == S_TRUE) sh_tiger_set_hashtype_mask(theFile->check_flags);
4052 sl_strlcpy(fileHash,
4053 sh_tiger_generic_hash (theFile->fullpath,
4054 rval_open, &length_current,
4055 alert_timeout,
4056 hashbuf, sizeof(hashbuf)),
4057 KEY_LEN+1);
4058
4059 content = sl_get_content(rval_open);
4060 content = sh_string_copy(content);
4061
4062 if ((theFile->check_flags & MODI_SGROW) != 0)
4063 {
4064 /* Update size so it matches the one for which the checksum
4065 has been computed */
4066 fbuf.st_size = length_current;
4067 buf.st_size = fbuf.st_size;
4068 sl_rewind(rval_open);
4069 sh_unix_checksum_size (theFile->fullpath, length_current, S_TRUE,
4070 &fileHash[KEY_LEN + 1],
4071 alert_timeout, rval_open, theFile->check_flags);
4072 }
4073 }
4074 }
4075 }
4076
4077 /* --- case 3b: a regular file, fstat ok, but different ---
4078 */
4079 else if (fstat_return == 0 && S_ISREG(fbuf.st_mode))
4080 {
4081 memcpy (&buf, &fbuf, sizeof( struct stat ));
4082
4083 if (fileHash != NULL)
4084 {
4085 if ((theFile->check_flags & MODI_CHK) == 0 ||
4086 sh_restrict_this(theFile->fullpath, (UINT64) fbuf.st_size,
4087 (UINT64) fbuf.st_mode, rval_open))
4088 {
4089 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4090 }
4091 else if (policy == SH_LEVEL_PRELINK &&
4092 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
4093 alert_timeout, theFile->fullpath))
4094 {
4095 if (0 != sh_prelink_run (theFile->fullpath,
4096 fileHash, alert_timeout, theFile->check_flags))
4097 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4098 }
4099 else
4100 {
4101 char hashbuf[KEYBUF_SIZE];
4102 UINT64 length_current = TIGER_NOLIM;
4103
4104 if (MODI_TXT_ENABLED(theFile->check_flags) && fbuf.st_size < (10 * SH_TXT_MAX))
4105 {
4106 sl_init_content (rval_open, fbuf.st_size);
4107 }
4108
4109 if (sh.flag.opts == S_TRUE) sh_tiger_set_hashtype_mask(theFile->check_flags);
4110 sl_strlcpy(fileHash,
4111 sh_tiger_generic_hash (theFile->fullpath, rval_open,
4112 &length_current,
4113 alert_timeout,
4114 hashbuf, sizeof(hashbuf)),
4115 KEY_LEN + 1);
4116
4117 content = sl_get_content(rval_open);
4118 content = sh_string_copy(content);
4119
4120 if ((theFile->check_flags & MODI_SGROW) != 0)
4121 {
4122 /* Update size so it matches the one for which the checksum
4123 has been computed */
4124 fbuf.st_size = length_current;
4125 buf.st_size = fbuf.st_size;
4126 sl_rewind(rval_open);
4127 sh_unix_checksum_size (theFile->fullpath, length_current, S_TRUE,
4128 &fileHash[KEY_LEN + 1],
4129 alert_timeout, rval_open, theFile->check_flags);
4130 }
4131 }
4132 }
4133 }
4134
4135 /* --- case 4: a regular file, fstat failed ---
4136 */
4137
4138 else /* fstat_return != 0 or !S_ISREG(fbuf.st_mode) or open() failed */
4139 {
4140 uid_t euid;
4141
4142 if (fileHash != NULL)
4143 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4144
4145 if ((theFile->check_flags & MODI_CHK) != 0)
4146 {
4147 tmp2 = sh_util_safe_name (theFile->fullpath);
4148
4149
4150 if (fd >= 0 && fstat_return != 0)
4151 {
4152 char errbuf[SH_ERRBUF_SIZE];
4153 (void) sl_get_euid(&euid);
4154
4155 SH_MUTEX_LOCK(mutex_thread_nolog);
4156 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
4157 _("fstat"),
4158 sh_error_message (fstat_errno, errbuf, sizeof(errbuf)),
4159 (long) euid,
4160 tmp2);
4161 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4162 }
4163 else if (fd >= 0 && !S_ISREG(fbuf.st_mode))
4164 {
4165 SH_MUTEX_LOCK(mutex_thread_nolog);
4166 sh_error_handle (level, FIL__, __LINE__, fstat_errno,
4167 MSG_E_NOTREG, tmp2);
4168 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4169 }
4170 else
4171 {
4172 char errbuf[SH_ERRBUF_SIZE];
4173 char errbuf2[SH_ERRBUF_SIZE];
4174 sl_strlcpy(errbuf, sl_error_string(rval_open), sizeof(errbuf));
4175 sh_error_message(err_open, errbuf2, sizeof(errbuf2));
4176 SH_MUTEX_LOCK(mutex_thread_nolog);
4177 sh_error_handle (level, FIL__, __LINE__, err_open,
4178 MSG_E_READ, errbuf, errbuf2, tmp2);
4179 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4180 }
4181 SH_FREE(tmp2);
4182 }
4183 }
4184
4185
4186 /* --- Determine file type. ---
4187 */
4188 memset (theFile->c_mode, '-', CMODE_SIZE-1);
4189 theFile->c_mode[CMODE_SIZE-1] = '\0';
4190
4191 memset (theFile->link_c_mode, '-', CMODE_SIZE-1);
4192 theFile->link_c_mode[CMODE_SIZE-1] = '\0';
4193
4194 sh_unix_getinfo_type (&buf, &type, theFile->c_mode);
4195 theFile->type = type;
4196
4197#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
4198
4199 /* --- Determine file attributes. ---
4200 */
4201 memset (theFile->c_attributes, '-', ATTRBUF_SIZE);
4202 theFile->c_attributes[ATTRBUF_USED] = '\0';
4203 theFile->attributes = 0;
4204
4205#if (defined(__linux__) && (defined(HAVE_LINUX_EXT2_FS_H) || defined(HAVE_EXT2FS_EXT2_FS_H))) || defined(HAVE_STAT_FLAGS)
4206 if (theFile->c_mode[0] != 'c' && theFile->c_mode[0] != 'b' &&
4207 theFile->c_mode[0] != 'l' )
4208 sh_unix_getinfo_attr(theFile->fullpath,
4209 &theFile->attributes, theFile->c_attributes,
4210 fd, &buf);
4211#endif
4212#endif
4213
4214#if defined(USE_XATTR) && defined(USE_ACL)
4215 if (sh_unix_check_selinux == S_TRUE || sh_unix_check_acl == S_TRUE)
4216 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
4217#elif defined(USE_XATTR)
4218 if (sh_unix_check_selinux == S_TRUE)
4219 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
4220#elif defined(USE_ACL)
4221 if (sh_unix_check_acl == S_TRUE)
4222 theFile->attr_string = sh_unix_getinfo_acl (theFile->fullpath, fd, &buf);
4223#else
4224 theFile->attr_string = NULL;
4225#endif
4226
4227 if (!SL_ISERROR(rval_open))
4228 sl_close(rval_open);
4229
4230
4231 /* --- I/O limit. ---
4232 */
4233 if (IO_Limit > 0)
4234 {
4235 runtim = (long) (time(NULL) - sh.statistics.time_start);
4236
4237 if (runtim > 0 && (long)(sh.statistics.bytes_hashed/runtim) > IO_Limit)
4238 retry_msleep(1, 0);
4239 }
4240
4241 /* --- Determine permissions. ---
4242 */
4243 sh_unix_getinfo_mode (&buf, &mode, theFile->c_mode);
4244
4245 /* --- Trivia. ---
4246 */
4247 theFile->dev = buf.st_dev;
4248 theFile->ino = buf.st_ino;
4249 theFile->mode = buf.st_mode;
4250 theFile->hardlinks = buf.st_nlink;
4251 theFile->owner = buf.st_uid;
4252 theFile->group = buf.st_gid;
4253 theFile->rdev = buf.st_rdev;
4254 theFile->size = buf.st_size;
4255 theFile->blksize = (unsigned long) buf.st_blksize;
4256 theFile->blocks = (unsigned long) buf.st_blocks;
4257 theFile->atime = buf.st_atime;
4258 theFile->mtime = buf.st_mtime;
4259 theFile->ctime = buf.st_ctime;
4260
4261
4262 /* --- Owner and group. ---
4263 */
4264
4265 if (NULL == sh_unix_getGIDname(SH_ERR_ALL, buf.st_gid, theFile->c_group, GROUP_MAX+1)) {
4266
4267 tmp2 = sh_util_safe_name (theFile->fullpath);
4268
4269 if (policy == SH_LEVEL_ALLIGNORE)
4270 {
4271 SH_MUTEX_LOCK(mutex_thread_nolog);
4272 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
4273 MSG_FI_NOGRP,
4274 (long) buf.st_gid, tmp2);
4275 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4276 }
4277 else
4278 {
4279 SH_MUTEX_LOCK(mutex_thread_nolog);
4280 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
4281 MSG_FI_NOGRP,
4282 (long) buf.st_gid, tmp2);
4283 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4284 }
4285 SH_FREE(tmp2);
4286 sl_snprintf(theFile->c_group, GROUP_MAX+1, "%d", (long) buf.st_gid);
4287 }
4288
4289
4290 if (NULL == sh_unix_getUIDname(SH_ERR_ALL, buf.st_uid, theFile->c_owner, USER_MAX+1)) {
4291
4292 tmp2 = sh_util_safe_name (theFile->fullpath);
4293
4294 if (policy == SH_LEVEL_ALLIGNORE)
4295 {
4296 SH_MUTEX_LOCK(mutex_thread_nolog);
4297 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
4298 MSG_FI_NOUSR,
4299 (long) buf.st_uid, tmp2);
4300 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4301 }
4302 else
4303 {
4304 SH_MUTEX_LOCK(mutex_thread_nolog);
4305 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
4306 MSG_FI_NOUSR,
4307 (long) buf.st_uid, tmp2);
4308 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4309 }
4310 SH_FREE(tmp2);
4311 sl_snprintf(theFile->c_owner, USER_MAX+1, "%d", (long) buf.st_uid);
4312 }
4313
4314 /* --- Output the file. ---
4315 */
4316 if (flag_err_debug == S_TRUE)
4317 {
4318 tmp2 = sh_util_safe_name ((filename == NULL) ?
4319 theFile->fullpath : filename);
4320 (void) sh_unix_time(theFile->mtime, timestr, sizeof(timestr));
4321 SH_MUTEX_LOCK(mutex_thread_nolog);
4322 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LIST,
4323 theFile->c_mode,
4324 theFile->hardlinks,
4325 theFile->c_owner,
4326 theFile->c_group,
4327 (unsigned long) theFile->size,
4328 timestr,
4329 tmp2);
4330 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4331 SH_FREE(tmp2);
4332 }
4333
4334 /* --- Check for links. ---
4335 */
4336 if (theFile->c_mode[0] == 'l')
4337 {
4338 linknamebuf = SH_ALLOC(PATH_MAX);
4339
4340 /* flawfinder: ignore */
4341 linksize = readlink (theFile->fullpath, linknamebuf, PATH_MAX-1);
4342
4343 if (linksize < (PATH_MAX-1) && linksize >= 0)
4344 linknamebuf[linksize] = '\0';
4345 else
4346 linknamebuf[PATH_MAX-1] = '\0';
4347
4348 if (linksize < 0)
4349 {
4350 char errbuf[SH_ERRBUF_SIZE];
4351 linksize = errno;
4352 tmp2 = sh_util_safe_name (theFile->fullpath);
4353 SH_MUTEX_LOCK(mutex_thread_nolog);
4354 sh_error_handle (level, FIL__, __LINE__, linksize, MSG_FI_RDLNK,
4355 sh_error_message (linksize, errbuf, sizeof(errbuf)), tmp2);
4356 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4357 SH_FREE(tmp2);
4358 SH_FREE(linknamebuf);
4359 theFile->link_path = sh_util_strdup("-");
4360 SL_RETURN((-1),_("sh_unix_getinfo"));
4361 }
4362
4363 if (linknamebuf[0] == '/')
4364 {
4365 theFile->link_path = sh_util_strdup (linknamebuf);
4366 }
4367 else
4368 {
4369 tmp = sh_util_dirname(theFile->fullpath);
4370 if (tmp) {
4371 theFile->link_path = SH_ALLOC(PATH_MAX);
4372 sl_strlcpy (theFile->link_path, tmp, PATH_MAX);
4373 SH_FREE(tmp);
4374 } else {
4375 theFile->link_path = SH_ALLOC(PATH_MAX);
4376 theFile->link_path[0] = '\0';
4377 }
4378 /*
4379 * Only attach '/' if not root directory. Handle "//", which
4380 * according to POSIX is implementation-defined, and may be
4381 * different from "/" (however, three or more '/' will collapse
4382 * to one).
4383 */
4384 tmp = theFile->link_path; while (*tmp == '/') ++tmp;
4385 if (*tmp != '\0')
4386 {
4387 sl_strlcat (theFile->link_path, "/", PATH_MAX);
4388 }
4389 sl_strlcat (theFile->link_path, linknamebuf, PATH_MAX);
4390 }
4391
4392 /* stat the link
4393 */
4394 stat_return = retry_lstat (FIL__, __LINE__, theFile->link_path, &lbuf);
4395
4396 /* check for error
4397 */
4398 if (stat_return != 0)
4399 {
4400 stat_return = errno;
4401 tmp = sh_util_safe_name (theFile->fullpath);
4402 tmp2 = sh_util_safe_name (theFile->link_path);
4403 if (stat_return != ENOENT)
4404 {
4405 uid_t euid;
4406 char errbuf[SH_ERRBUF_SIZE];
4407
4408 (void) sl_get_euid(&euid);
4409 SH_MUTEX_LOCK(mutex_thread_nolog);
4410 sh_error_handle (level, FIL__, __LINE__, stat_return,
4411 MSG_FI_STAT,
4412 _("lstat (link target)"),
4413 sh_error_message (stat_return,errbuf, sizeof(errbuf)),
4414 (long) euid,
4415 tmp2);
4416 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4417 }
4418 else
4419 {
4420 /* a dangling link -- everybody seems to have plenty of them
4421 */
4422 SH_MUTEX_LOCK(mutex_thread_nolog);
4423 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_DLNK,
4424 tmp, tmp2);
4425 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4426 }
4427 theFile->linkisok = BAD;
4428 SH_FREE(tmp);
4429 SH_FREE(tmp2);
4430 SH_FREE(linknamebuf);
4431 /*
4432 * changed Tue Feb 10 16:16:13 CET 2004:
4433 * add dangling symlinks into database
4434 * SL_RETURN((-1),_("sh_unix_getinfo"));
4435 */
4436 theFile->linkmode = 0;
4437 SL_RETURN((0),_("sh_unix_getinfo"));
4438 }
4439
4440 theFile->linkisok = GOOD;
4441
4442
4443 /* --- Determine file type. ---
4444 */
4445 sh_unix_getinfo_type (&lbuf, &type, theFile->link_c_mode);
4446 theFile->type = type;
4447
4448 /* --- Determine permissions. ---
4449 */
4450 sh_unix_getinfo_mode (&lbuf, &mode, theFile->link_c_mode);
4451 theFile->linkmode = lbuf.st_mode;
4452
4453 /* --- Output the link. ---
4454 */
4455 if (theFile->linkisok == GOOD)
4456 {
4457 tmp2 = sh_util_safe_name (linknamebuf);
4458 SH_MUTEX_LOCK(mutex_thread_nolog);
4459 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LLNK,
4460 theFile->link_c_mode, tmp2);
4461 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4462 SH_FREE(tmp2);
4463 }
4464 SH_FREE(linknamebuf);
4465 }
4466 else /* not a link, theFile->c_mode[0] != 'l' */
4467 {
4468 if (content)
4469 {
4470#ifdef HAVE_LIBZ
4471 unsigned long clen;
4472 unsigned char * compressed;
4473#ifdef HAVE_COMPRESSBOUND
4474 clen = compressBound(sh_string_len(content));
4475#else
4476 if (sh_string_len(content) > 10*SH_TXT_MAX)
4477 clen = SH_TXT_MAX;
4478 else
4479 clen = 13 + (int)(1.0001*sh_string_len(content));
4480#endif
4481 compressed = SH_ALLOC(clen);
4482 if (Z_OK == compress(compressed, &clen,
4483 (unsigned char *) sh_string_str(content),
4484 sh_string_len(content)))
4485 {
4486 if (clen < SH_TXT_MAX)
4487 {
4488 sh_util_base64_enc_alloc (&(theFile->link_path),
4489 (char *) compressed, clen);
4490 }
4491 else
4492 {
4493 char tmsg[128];
4494 char * tpath = sh_util_safe_name (theFile->fullpath);
4495 sl_snprintf(tmsg, sizeof(tmsg),
4496 _("compressed file too large (%lu bytes)"),
4497 clen);
4498 SH_MUTEX_LOCK(mutex_thread_nolog);
4499 sh_error_handle (SH_ERR_WARN, FIL__, __LINE__, -1,
4500 MSG_E_SUBGPATH, tmsg,
4501 _("sh_unix_getinfo"), tpath);
4502 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4503 SH_FREE(tpath);
4504 }
4505 }
4506 SH_FREE(compressed);
4507#endif
4508 sh_string_destroy(&content);
4509 }
4510 }
4511 SL_RETURN((0),_("sh_unix_getinfo"));
4512}
4513
4514/* #if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE) */
4515#endif
4516
4517int sh_unix_unlock(char * lockfile, char * flag)
4518{
4519 int error = 0;
4520
4521 SL_ENTER(_("sh_unix_unlock"));
4522
4523 if (sh.flag.isdaemon == S_FALSE && flag == NULL)
4524 SL_RETURN((0),_("sh_unix_unlock"));
4525
4526 /* --- Logfile is not locked to us. ---
4527 */
4528 if (sh.flag.islocked == BAD && flag != NULL)
4529 SL_RETURN((-1),_("sh_unix_unlock"));
4530
4531 /* --- Check whether the directory is secure. ---
4532 */
4533 if (0 != tf_trust_check (lockfile, SL_YESPRIV))
4534 SL_RETURN((-1),_("sh_unix_unlock"));
4535
4536 /* --- Delete the lock file. ---
4537 */
4538 error = retry_aud_unlink (FIL__, __LINE__, lockfile);
4539
4540 if (error == 0)
4541 {
4542 if (flag != NULL)
4543 sh.flag.islocked = BAD; /* not locked anymore */
4544 }
4545 else if (flag != NULL)
4546 {
4547 char errbuf[SH_ERRBUF_SIZE];
4548 error = errno;
4549 sh_error_handle ((-1), FIL__, __LINE__, error, MSG_E_UNLNK,
4550 sh_error_message(error, errbuf, sizeof(errbuf)),
4551 lockfile);
4552 SL_RETURN((-1),_("sh_unix_unlock"));
4553 }
4554 SL_RETURN((0),_("sh_unix_unlock"));
4555}
4556
4557int sh_unix_check_piddir (char * pidpath)
4558{
4559 static struct stat buf;
4560 int status = 0;
4561 char * pid_dir;
4562
4563 SL_ENTER(_("sh_unix_check_piddir"));
4564
4565 pid_dir = sh_util_dirname (pidpath);
4566
4567 status = retry_lstat (FIL__, __LINE__, pid_dir, &buf);
4568
4569 if (status < 0 && errno == ENOENT)
4570 {
4571 status = mkdir (pid_dir, 0777);
4572 if (status < 0)
4573 {
4574 sh_error_handle ((-1), FIL__, __LINE__, status,
4575 MSG_E_SUBGEN,
4576 _("Cannot create PID directory"),
4577 _("sh_unix_check_piddir"));
4578 SH_FREE(pid_dir);
4579 SL_RETURN((-1),_("sh_unix_check_piddir"));
4580 }
4581 }
4582 else if (!S_ISDIR(buf.st_mode))
4583 {
4584 sh_error_handle ((-1), FIL__, __LINE__, status,
4585 MSG_E_SUBGEN,
4586 _("Path of PID directory refers to a non-directory object"),
4587 _("sh_unix_check_piddir"));
4588 SH_FREE(pid_dir);
4589 SL_RETURN((-1),_("sh_unix_check_piddir"));
4590 }
4591 SH_FREE(pid_dir);
4592 SL_RETURN((0),_("sh_unix_check_piddir"));
4593}
4594
4595int sh_unix_lock (char * lockfile, char * flag)
4596{
4597 int filed;
4598 int errnum;
4599 char myPid[64];
4600 SL_TICKET fd;
4601 extern int get_the_fd (SL_TICKET ticket);
4602
4603 SL_ENTER(_("sh_unix_lock"));
4604
4605 sl_snprintf (myPid, sizeof(myPid), "%ld\n", (long) sh.pid); /* known to fit */
4606
4607 if (flag == NULL) /* PID file, check for directory */
4608 {
4609 if (0 != sh_unix_check_piddir (lockfile))
4610 {
4611 SL_RETURN((-1),_("sh_unix_lock"));
4612 }
4613 }
4614
4615 fd = sl_open_safe_rdwr (FIL__, __LINE__,
4616 lockfile, SL_YESPRIV); /* fails if file exists */
4617
4618 if (!SL_ISERROR(fd))
4619 {
4620 errnum = sl_write (fd, myPid, sl_strlen(myPid));
4621 filed = get_the_fd(fd);
4622 fchmod (filed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
4623 sl_close (fd);
4624
4625 if (!SL_ISERROR(errnum))
4626 {
4627 if (flag != NULL)
4628 sh.flag.islocked = GOOD;
4629 SL_RETURN((0),_("sh_unix_lock"));
4630 }
4631 }
4632
4633 TPT((0, FIL__, __LINE__, _("msg=<open pid file failed>\n")));
4634 if (flag != NULL)
4635 sh.flag.islocked = BAD;
4636 SL_RETURN((-1),_("sh_unix_lock"));
4637
4638 /* notreached */
4639}
4640
4641
4642/* check whether file is locked
4643 */
4644int sh_unix_test_and_lock (char * filename, char * lockfile)
4645{
4646 static struct stat buf;
4647 int status = 0;
4648
4649
4650 SL_TICKET fd;
4651 char line_in[128];
4652
4653 SL_ENTER(_("sh_unix_test_and_lock"));
4654
4655 status = retry_lstat (FIL__, __LINE__, lockfile, &buf);
4656
4657 /* --- No lock file found, try to lock. ---
4658 */
4659
4660 if (status < 0 && errno == ENOENT)
4661 {
4662 if (0 == sh_unix_lock (lockfile, filename))
4663 {
4664 if (filename != NULL)
4665 sh.flag.islocked = GOOD;
4666 SL_RETURN((0),_("sh_unix_test_and_lock"));
4667 }
4668 else
4669 {
4670 sh_error_handle ((-1), FIL__, __LINE__, status,
4671 MSG_E_SUBGEN,
4672 (filename == NULL) ? _("Cannot create PID file (1)") : _("Cannot create lock file (1)"),
4673 _("sh_unix_test_and_lock"));
4674 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4675 }
4676 }
4677 else if (status == 0 && buf.st_size == 0)
4678 {
4679 if (filename != NULL)
4680 sh.flag.islocked = GOOD;
4681 sh_unix_unlock (lockfile, filename);
4682 if (filename != NULL)
4683 sh.flag.islocked = BAD;
4684 if (0 == sh_unix_lock (lockfile, filename))
4685 {
4686 if (filename != NULL)
4687 sh.flag.islocked = GOOD;
4688 SL_RETURN((0),_("sh_unix_test_and_lock"));
4689 }
4690 else
4691 {
4692 sh_error_handle ((-1), FIL__, __LINE__, status,
4693 MSG_E_SUBGEN,
4694 (filename == NULL) ? _("Cannot create PID file (2)") : _("Cannot create lock file (2)"),
4695 _("sh_unix_test_and_lock"));
4696 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4697 }
4698 }
4699
4700 /* --- Check on lock. ---
4701 */
4702
4703 if (status >= 0)
4704 {
4705 fd = sl_open_read (FIL__, __LINE__, lockfile, SL_YESPRIV);
4706 if (SL_ISERROR(fd))
4707 sh_error_handle ((-1), FIL__, __LINE__, fd,
4708 MSG_E_SUBGEN,
4709 (filename == NULL) ? _("Cannot open PID file for read") : _("Cannot open lock file for read"),
4710 _("sh_unix_test_and_lock"));
4711 }
4712 else
4713 fd = -1;
4714
4715 if (!SL_ISERROR(fd))
4716 {
4717 /* read the PID in the lock file
4718 */
4719 status = sl_read (fd, line_in, sizeof(line_in));
4720 line_in[sizeof(line_in)-1] = '\0';
4721
4722 /* convert to numeric
4723 */
4724 if (status > 0)
4725 {
4726 errno = 0;
4727 status = strtol(line_in, (char **)NULL, 10);
4728 if (errno == ERANGE || status <= 0)
4729 {
4730 sh_error_handle ((-1), FIL__, __LINE__, status,
4731 MSG_E_SUBGEN,
4732 (filename == NULL) ? _("Bad PID in PID file") : _("Bad PID in lock file"),
4733 _("sh_unix_test_and_lock"));
4734
4735 status = -1;
4736 }
4737 }
4738 else
4739 {
4740 sh_error_handle ((-1), FIL__, __LINE__, status,
4741 MSG_E_SUBGEN,
4742 (filename == NULL) ? _("Cannot read PID file") : _("Cannot read lock file"),
4743 _("sh_unix_test_and_lock"));
4744 }
4745 sl_close(fd);
4746
4747 if (status > 0 && (unsigned int) status == sh.pid)
4748 {
4749 if (filename != NULL)
4750 sh.flag.islocked = GOOD;
4751 SL_RETURN((0),_("sh_unix_test_and_lock"));
4752 }
4753
4754
4755 /* --- Check whether the process exists. ---
4756 */
4757 if (status > 0)
4758 {
4759 errno = 0;
4760 status = aud_kill (FIL__, __LINE__, status, 0);
4761
4762 /* Does not exist, so remove the stale lock
4763 * and create a new one.
4764 */
4765 if (status < 0 && errno == ESRCH)
4766 {
4767 if (filename != NULL)
4768 sh.flag.islocked = GOOD;
4769 if (0 != sh_unix_unlock(lockfile, filename) && (filename !=NULL))
4770 sh.flag.islocked = BAD;
4771 else
4772 {
4773 if (0 == sh_unix_lock (lockfile, filename))
4774 {
4775 if (filename != NULL)
4776 sh.flag.islocked = GOOD;
4777 SL_RETURN((0),_("sh_unix_test_and_lock"));
4778 }
4779 else
4780 {
4781 sh_error_handle ((-1), FIL__, __LINE__, status,
4782 MSG_E_SUBGEN,
4783 (filename == NULL) ? _("Cannot create PID file (3)") : _("Cannot create lock file (3)"),
4784 _("sh_unix_test_and_lock"));
4785 }
4786 if (filename != NULL)
4787 sh.flag.islocked = BAD;
4788 }
4789 }
4790 else
4791 {
4792 sh_error_handle ((-1), FIL__, __LINE__, status,
4793 MSG_E_SUBGEN,
4794 (filename == NULL) ? _("Cannot remove stale PID file, PID may be a running process") : _("Cannot remove stale lock file, PID may be a running process"),
4795 _("sh_unix_test_and_lock"));
4796 if (filename != NULL)
4797 sh.flag.islocked = BAD;
4798 }
4799 }
4800 }
4801 SL_RETURN((-1),_("sh_unix_testlock"));
4802}
4803
4804/* write the PID file
4805 */
4806int sh_unix_write_pid_file()
4807{
4808 return sh_unix_test_and_lock(NULL, sh.srvlog.alt);
4809}
4810
4811/* write lock for filename
4812 */
4813int sh_unix_write_lock_file(char * filename)
4814{
4815 size_t len;
4816 int res;
4817 char * lockfile;
4818
4819 if (filename == NULL)
4820 return (-1);
4821
4822 len = sl_strlen(filename);
4823 if (sl_ok_adds(len, 6))
4824 len += 6;
4825 lockfile = SH_ALLOC(len);
4826 sl_strlcpy(lockfile, filename, len);
4827 sl_strlcat(lockfile, _(".lock"), len);
4828 res = sh_unix_test_and_lock(filename, lockfile);
4829 SH_FREE(lockfile);
4830 return res;
4831}
4832
4833/* rm lock for filename
4834 */
4835int sh_unix_rm_lock_file(char * filename)
4836{
4837 size_t len;
4838 int res;
4839 char * lockfile;
4840
4841 if (filename == NULL)
4842 return (-1);
4843
4844 len = sl_strlen(filename);
4845 if (sl_ok_adds(len, 6))
4846 len += 6;
4847 lockfile = SH_ALLOC(len);
4848 sl_strlcpy(lockfile, filename, len);
4849 sl_strlcat(lockfile, _(".lock"), len);
4850
4851 res = sh_unix_unlock(lockfile, filename);
4852 SH_FREE(lockfile);
4853 return res;
4854}
4855
4856/* rm lock for filename
4857 */
4858int sh_unix_rm_pid_file()
4859{
4860 return sh_unix_unlock(sh.srvlog.alt, NULL);
4861}
4862
4863/* Test whether file exists
4864 */
4865int sh_unix_file_exists(char * path)
4866{
4867 struct stat buf;
4868
4869 SL_ENTER(_("sh_unix_file_exists"));
4870
4871 if (0 == retry_lstat(FIL__, __LINE__, path, &buf))
4872 SL_RETURN( S_TRUE, _("sh_unix_file_exists"));
4873 else
4874 SL_RETURN( S_FALSE, _("sh_unix_file_exists"));
4875}
4876
4877
4878/* Test whether file exists, is a character device, and allows read
4879 * access.
4880 */
4881int sh_unix_device_readable(int fd)
4882{
4883 struct stat buf;
4884
4885 SL_ENTER(_("sh_unix_device_readable"));
4886
4887 if (retry_fstat(FIL__, __LINE__, fd, &buf) == -1)
4888 SL_RETURN( (-1), _("sh_unix_device_readable"));
4889 else if ( S_ISCHR(buf.st_mode) && 0 != (S_IROTH & buf.st_mode) )
4890 SL_RETURN( (0), _("sh_unix_device_readable"));
4891 else
4892 SL_RETURN( (-1), _("sh_unix_device_readable"));
4893}
4894
4895static char preq[16];
4896
4897/* return true if database is remote
4898 */
4899int file_is_remote ()
4900{
4901 static int init = 0;
4902 struct stat buf;
4903
4904 SL_ENTER(_("file_is_remote"));
4905
4906 if (init == 0)
4907 {
4908 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4909 ++init;
4910 }
4911 if (0 == sl_strncmp (sh.data.path, preq, 15))
4912 {
4913 if (sh.data.path[15] != '\0') /* should be start of path */
4914 {
4915 if (0 == stat(&(sh.data.path[15]), &buf))
4916 {
4917 SL_RETURN( S_FALSE, _("file_is_remote"));
4918 }
4919 else
4920 {
4921 char * tmp = sh_util_safe_name (&(sh.data.path[15]));
4922 sh_error_handle((-1), FIL__, __LINE__, S_FALSE, MSG_E_SUBGPATH,
4923 _("No local baseline database at expected path"),
4924 _("file_is_remote"),
4925 tmp);
4926 SH_FREE(tmp);
4927 }
4928 }
4929 else
4930 {
4931 sh_error_handle((-1), FIL__, __LINE__, S_FALSE, MSG_E_SUBGEN,
4932 _("No local baseline database path known"),
4933 _("file_is_remote"));
4934 }
4935 SL_RETURN( S_TRUE, _("file_is_remote"));
4936 }
4937 SL_RETURN( S_FALSE, _("file_is_remote"));
4938}
4939
4940/* Return the path to the configuration/database file.
4941 */
4942char * file_path(char what, char flag)
4943{
4944 static int init = 0;
4945
4946 SL_ENTER(_("file_path"));
4947
4948 if (init == 0)
4949 {
4950 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4951 ++init;
4952 }
4953
4954 switch (what)
4955 {
4956
4957 case 'C':
4958 if (0 == sl_strncmp (sh.conf.path, preq, 15))
4959 {
4960#if defined(SH_WITH_SERVER)
4961 if (sh.flag.isserver == S_TRUE && sl_strlen(sh.conf.path) == 15)
4962 SL_RETURN( NULL, _("file_path"));
4963 if (sh.flag.isserver == S_TRUE)
4964 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4965#endif
4966 if (flag == 'R')
4967 SL_RETURN( preq, _("file_path"));
4968 if (flag == 'I')
4969 {
4970 if (sl_strlen(sh.conf.path) == 15)
4971 SL_RETURN( NULL, _("file_path"));
4972 else
4973 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4974 }
4975 SL_RETURN ( preq, _("file_path"));
4976 }
4977 else
4978 SL_RETURN( sh.conf.path, _("file_path"));
4979 /* break; *//* unreachable */
4980
4981 case 'D':
4982 if (0 == sl_strncmp (sh.data.path, preq, 15))
4983 {
4984 if (flag == 'R')
4985 SL_RETURN( preq, _("file_path"));
4986 if (flag == 'W' && sl_strlen(sh.data.path) == 15)
4987 SL_RETURN (NULL, _("file_path"));
4988 if (flag == 'W')
4989 SL_RETURN( &(sh.data.path[15]), _("file_path"));
4990 }
4991 else
4992 SL_RETURN( sh.data.path, _("file_path"));
4993 break;
4994
4995 default:
4996 SL_RETURN( NULL, _("file_path"));
4997 }
4998
4999 return NULL; /* notreached */
5000}
5001/************************************************/
5002/**** Mlock Utilities ****/
5003/************************************************/
5004
5005#include <limits.h>
5006
5007int sh_unix_pagesize()
5008{
5009 int pagesize = 4096;
5010#if defined(_SC_PAGESIZE)
5011 pagesize = sysconf(_SC_PAGESIZE);
5012#elif defined(_SC_PAGE_SIZE)
5013 pagesize = sysconf(_SC_PAGE_SIZE);
5014#elif defined(HAVE_GETPAGESIZE)
5015 pagesize = getpagesize();
5016#elif defined(PAGESIZE)
5017 pagesize = PAGESIZE;
5018#endif
5019
5020 return ((pagesize > 0) ? pagesize : 4096);
5021}
5022
5023typedef struct sh_page_lt {
5024 unsigned long page_start;
5025 int page_refcount;
5026 char file[64];
5027 int line;
5028 struct sh_page_lt * next;
5029} sh_page_l;
5030
5031sh_page_l * sh_page_locked = NULL;
5032volatile int page_locking = 0;
5033
5034unsigned long sh_unix_lookup_page (void * in_addr, size_t len, int * num_pages)
5035{
5036 int pagesize = sh_unix_pagesize();
5037 unsigned long addr = (unsigned long) in_addr;
5038
5039 unsigned long pagebase;
5040 unsigned long pagediff;
5041 unsigned long pagenum = addr / pagesize;
5042
5043 SL_ENTER(_("sh_unix_lookup_page"));
5044#if 0
5045 fprintf(stderr, "mlock: --> base %ld, pagenum: %ld\n",
5046 addr, pagenum);
5047#endif
5048
5049 /* address of first page
5050 */
5051 pagebase = pagenum * pagesize;
5052
5053 /* number of pages
5054 */
5055 pagediff = (addr + len) - pagebase;
5056 pagenum = pagediff / pagesize;
5057 if (pagenum * pagesize < pagediff)
5058 ++pagenum;
5059
5060#if 0
5061 fprintf(stderr, "mlock: --> pagebase %ld, pagediff %ld, (addr + len) %ld\n",
5062 pagebase, pagediff, (addr + len));
5063#endif
5064
5065 *num_pages = pagenum;
5066 SL_RETURN((pagebase), _("sh_unix_lookup_page"));
5067}
5068
5069
5070#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5071
5072SH_MUTEX_STATIC(mutex_mlock,PTHREAD_MUTEX_INITIALIZER);
5073
5074int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
5075{
5076 int num_pages;
5077 int status = 0;
5078 int pagesize;
5079 sh_page_l * page_list;
5080 unsigned long addr;
5081#ifdef TEST_MLOCK
5082 int i = 0;
5083#endif
5084
5085 SL_ENTER(_("sh_unix_mlock"));
5086
5087 /* There's no cancellation point here, except if tracing is on
5088 */
5089 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5090
5091 page_list = sh_page_locked;
5092
5093 if (0 != page_locking)
5094 {
5095 status = -1;
5096 goto exit_mlock;
5097 }
5098
5099 page_locking = 1;
5100
5101 pagesize = sh_unix_pagesize();
5102 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
5103
5104#ifdef TEST_MLOCK
5105 fprintf(stderr, "mlock: addr %ld, base %ld, pages: %d, length %d\n",
5106 (unsigned long) in_addr, addr, num_pages, len);
5107#endif
5108
5109 /* increase refcount of locked pages
5110 * addr is first page; num_pages is #(consecutive pages) to lock
5111 */
5112
5113 while ((page_list != NULL) && (num_pages > 0))
5114 {
5115#ifdef TEST_MLOCK
5116 fprintf(stderr, "mlock: check page %d: %ld [%d]\n",
5117 i, page_list->page_start, page_list->page_refcount);
5118#endif
5119 if (page_list->page_start == addr)
5120 {
5121 page_list->page_refcount += 1;
5122 num_pages -= 1;
5123 addr += pagesize;
5124#ifdef TEST_MLOCK
5125 fprintf(stderr, "mlock: found page %d: %ld [%d], next page %ld\n",
5126 i, page_list->page_start, page_list->page_refcount, addr);
5127#endif
5128 }
5129#ifdef TEST_MLOCK
5130 ++i;
5131#endif
5132 page_list = page_list->next;
5133 }
5134
5135 /* mlock some more pages, if needed
5136 */
5137 while (num_pages > 0)
5138 {
5139#ifdef TEST_MLOCK
5140 fprintf(stderr, "mlock: lock page %d: mlock %ld [num_pages %d]\n",
5141 i, addr, num_pages);
5142 ++i;
5143#endif
5144 page_list = SH_ALLOC(sizeof(sh_page_l));
5145 page_list->page_start = addr;
5146 page_list->page_refcount = 1;
5147 sl_strlcpy(page_list->file, file, 64);
5148 page_list->line = line;
5149 status = mlock( (void *) addr, pagesize);
5150 if (status != 0)
5151 {
5152#ifdef TEST_MLOCK
5153 char errbuf[SH_ERRBUF_SIZE];
5154 fprintf(stderr, "mlock: error: %s\n",
5155 sh_error_message(errno, errbuf, sizeof(errbuf)));
5156#endif
5157 SH_FREE(page_list);
5158 page_locking = 0;
5159 goto exit_mlock;
5160 }
5161 page_list->next = sh_page_locked;
5162 sh_page_locked = page_list;
5163 num_pages -= 1;
5164 addr += pagesize;
5165 }
5166 page_locking = 0;
5167
5168 exit_mlock:
5169 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5170
5171 SL_RETURN((status), _("sh_unix_mlock"));
5172}
5173#else
5174int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
5175{
5176 (void) file; (void) line;
5177 (void) in_addr; (void) len;
5178 return -1;
5179}
5180#endif
5181
5182#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5183int sh_unix_munlock (void * in_addr, size_t len)
5184{
5185 int num_pages;
5186 int unlocked;
5187 int status;
5188 int pagesize;
5189 sh_page_l * page_list;
5190 sh_page_l * page_last;
5191 unsigned long addr;
5192
5193 int test_count;
5194 int test_status;
5195 int test_pages;
5196
5197#ifdef TEST_MLOCK
5198 int i = 0;
5199#endif
5200
5201 SL_ENTER(_("sh_unix_munlock"));
5202
5203 /* There's no cancellation point here, except if tracing is on
5204 */
5205 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5206
5207 unlocked = 0;
5208 status = 0;
5209 page_list = sh_page_locked;
5210
5211 if (0 != page_locking)
5212 {
5213 status = -1;
5214 goto exit_munlock;
5215 }
5216 page_locking = 1;
5217
5218 pagesize = sh_unix_pagesize();
5219 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
5220
5221#ifdef TEST_MLOCK
5222 fprintf(stderr, "munlock: in_addr %ld, addr %ld, pages: %d, length %d\n",
5223 (unsigned long) in_addr, addr, num_pages, len);
5224#endif
5225
5226 test_pages = num_pages;
5227
5228 /* reduce refcount of locked pages
5229 * addr is first page; num_pages is #(consecutive pages) to lock
5230 */
5231 while ((page_list != NULL) && (num_pages > 0))
5232 {
5233#ifdef TEST_MLOCK
5234 fprintf(stderr, "munlock: page %d: %ld [%d]\n",
5235 i, page_list->page_start, page_list->page_refcount);
5236#endif
5237
5238 test_status = 0;
5239 for (test_count = 0; test_count < test_pages; ++test_count)
5240 {
5241 if (page_list->page_start == (addr + (test_count * pagesize)))
5242 {
5243 test_status = 1;
5244 break;
5245 }
5246 }
5247
5248 if (test_status == 1)
5249 {
5250 page_list->page_refcount -= 1;
5251 if (page_list->page_refcount == 0)
5252 {
5253 status = munlock ( (void *) addr, pagesize);
5254 ++unlocked;
5255 }
5256 num_pages -= 1;
5257#ifdef TEST_MLOCK
5258 fprintf(stderr,
5259 "munlock: page %d: %ld [refcount %d], refcount reduced\n",
5260 i, page_list->page_start, page_list->page_refcount);
5261#endif
5262 }
5263#ifdef TEST_MLOCK
5264 ++i;
5265#endif
5266 page_list = page_list->next;
5267 }
5268
5269#ifdef TEST_MLOCK
5270 i = 0;
5271#endif
5272
5273 if (unlocked > 0)
5274 {
5275 page_list = sh_page_locked;
5276 page_last = sh_page_locked;
5277
5278 while ((page_list != NULL) && (unlocked > 0))
5279 {
5280 if (page_list->page_refcount == 0)
5281 {
5282#ifdef TEST_MLOCK
5283 fprintf(stderr, "munlock: remove page %d: %ld [refcount %d]\n",
5284 i, page_list->page_start, page_list->page_refcount);
5285#endif
5286 if (page_last != page_list)
5287 {
5288 page_last->next = page_list->next;
5289 SH_FREE(page_list);
5290 page_list = page_last->next;
5291 }
5292 else
5293 {
5294 page_last = page_list->next;
5295 if (page_list == sh_page_locked)
5296 sh_page_locked = page_list->next;
5297 SH_FREE(page_list);
5298 page_list = page_last;
5299 }
5300 --unlocked;
5301 }
5302 else
5303 {
5304#ifdef TEST_MLOCK
5305 fprintf(stderr, "munlock: skip page %d: %ld [refcount %d]\n",
5306 i, page_list->page_start, page_list->page_refcount);
5307#endif
5308
5309 page_last = page_list;
5310 page_list = page_list->next;
5311 }
5312#ifdef TEST_MLOCK
5313 ++i;
5314#endif
5315 }
5316 }
5317
5318 page_locking = 0;
5319
5320 exit_munlock:
5321 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5322 SL_RETURN((status), _("sh_unix_munlock"));
5323}
5324#else
5325int sh_unix_munlock (void * in_addr, size_t len)
5326{
5327 (void) in_addr; (void) len;
5328 return -1;
5329}
5330#endif
5331
5332int sh_unix_count_mlock()
5333{
5334 unsigned int i = 0;
5335 char str[32][64];
5336 sh_page_l * page_list;
5337
5338 SL_ENTER(_("sh_unix_count_mlock"));
5339
5340#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5341 /* There's no cancellation point here, except if tracing is on
5342 */
5343 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5344#endif
5345
5346 page_list = sh_page_locked;
5347
5348 while (page_list != NULL)
5349 {
5350#ifdef WITH_TPT
5351 if (i < 32)
5352 sl_snprintf(str[i], 64, _("file: %s line: %d page: %d"),
5353 page_list->file, page_list->line, i+1);
5354#endif
5355 page_list = page_list->next;
5356 ++i;
5357 }
5358
5359#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5360 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5361#endif
5362
5363#ifdef WITH_TPT
5364 {
5365 unsigned int j = 0;
5366 while (j < i && j < 32)
5367 {
5368 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, j, MSG_E_SUBGEN,
5369 str[j], _("sh_unix_count_mlock"));
5370 ++j;
5371 }
5372 }
5373#endif
5374
5375 sl_snprintf(str[0], 64, _("%d pages locked"), i);
5376 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, i, MSG_E_SUBGEN,
5377 str[0], _("sh_unix_count_mlock"));
5378 SL_RETURN((i), _("sh_unix_count_mlock"));
5379}
5380
5381/************************************************/
5382/************************************************/
5383/**** Stealth Utilities ****/
5384/************************************************/
5385/************************************************/
5386#ifdef SH_STEALTH
5387
5388void sh_unix_xor_code (char * str, int len)
5389{
5390 register int i;
5391
5392 for (i = 0; i < len; ++i) str[i] ^= (char) XOR_CODE;
5393 return;
5394}
5395
5396#if !defined(SH_STEALTH_MICRO)
5397
5398
5399int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
5400 unsigned long * bytes_read);
5401unsigned long first_hex_block(SL_TICKET fd, unsigned long * max);
5402
5403/*
5404 * --- Get hidden data from a block of hex data. ---
5405 */
5406int sh_unix_getline_stealth (SL_TICKET fd, char * str, int len)
5407{
5408 int add_off = 0, llen;
5409 unsigned long bread;
5410 static unsigned long off_data = 0;
5411 static unsigned long max_data = 0;
5412 static unsigned long bytes_read = 0;
5413 static int stealth_init = BAD;
5414
5415 SL_ENTER(_("sh_unix_getline_stealth"));
5416
5417 if (str == NULL)
5418 {
5419 off_data = 0;
5420 max_data = 0;
5421 bytes_read = 0;
5422 stealth_init = BAD;
5423 SL_RETURN(0, _("sh_unix_getline_stealth"));
5424 }
5425
5426 /* --- Initialize. ---
5427 */
5428 if (stealth_init == BAD)
5429 {
5430 off_data = first_hex_block(fd, &max_data);
5431 if (off_data == 0)
5432 {
5433 dlog(1, FIL__, __LINE__,
5434 _("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"));
5435 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
5436 _("Stealth config file."));
5437 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
5438 }
5439 stealth_init = GOOD;
5440 max_data += off_data;
5441 }
5442
5443 /* --- Seek to proper position. ---
5444 */
5445 if (bytes_read >= max_data || add_off < 0)
5446 {
5447 dlog(1, FIL__, __LINE__,
5448 _("The capacity of the container image file for the stealth config file seems to be too small. Your config file is likely truncated.\n"));
5449 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
5450 _("Stealth config file."));
5451 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
5452 }
5453 sl_seek(fd, off_data);
5454
5455 /* --- Read one line. ---
5456 */
5457 add_off = hideout_hex_block(fd, (unsigned char *) str, len, &bread);
5458 if (add_off > 0)
5459 off_data += add_off;
5460 bytes_read += bread;
5461
5462 if (bread == 0 || add_off <= 0) /* EOF */
5463 str[0] = '\0';
5464
5465 llen = sl_strlen(str);
5466 SL_RETURN(llen, _("sh_unix_getline_stealth"));
5467}
5468
5469int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
5470 unsigned long * bytes_read)
5471{
5472
5473 register int i, j, k;
5474 unsigned char c, e;
5475 register int num;
5476 unsigned char mask[9] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
5477 unsigned long here = 0;
5478 unsigned long retval = 0;
5479 unsigned long bread = 0;
5480
5481 SL_ENTER(_("hideout_hex_block"));
5482
5483 ASSERT_RET((len > 1), _("len > 1"), (0));
5484
5485 str[0] = '\0';
5486 *bytes_read = 0;
5487 --len;
5488
5489 i = 0;
5490 while (i < len)
5491 {
5492 for (j = 0; j < 8; ++j)
5493 {
5494
5495 /* --- Get a low byte, modify, read back. ---
5496 */
5497 for (k = 0; k < 2; ++k)
5498 {
5499 /* -- Skip whitespace. ---
5500 */
5501 c = ' ';
5502 do {
5503 do {
5504 errno = 0;
5505 num = sl_read (fd, &c, 1);
5506 } while (num == 0 && errno == EINTR);
5507 if (num > 0)
5508 ++here;
5509 else if (num == 0) {
5510 SL_RETURN((-1), _("hideout_hex_block"));
5511 }
5512 else {
5513 SL_RETURN((-1), _("hideout_hex_block"));
5514 }
5515 } while (c == '\n' || c == '\t' || c == '\r' ||
5516 c == ' ');
5517 }
5518
5519
5520 /* --- e is the value of the low byte. ---
5521 */
5522 e = (unsigned char) sh_util_hexchar( c );
5523 if ((e & mask[7]) != 0) /* bit is set */
5524 str[i] |= mask[j];
5525 else /* bit is not set */
5526 str[i] &= ~mask[j];
5527
5528 bread += 1;
5529 }
5530 if (str[i] == '\n') break;
5531 ++i;
5532 }
5533
5534 if (i != 0)
5535 str[i] = '\0';
5536 else if (str[0] == '\n')
5537 str[i+1] = '\0'; /* keep newline and terminate */
5538 else
5539 str[0] = '\0';
5540 retval += here;
5541 *bytes_read += (bread/8);
5542
5543 SL_RETURN(retval, _("hideout_hex_block"));
5544}
5545
5546/* --- Get offset of first data block. ---
5547 */
5548unsigned long first_hex_block(SL_TICKET fd, unsigned long * max)
5549{
5550 unsigned int i;
5551 long num = 1;
5552 unsigned long lnum;
5553 char c;
5554 int nothex = 0;
5555 unsigned long retval = 0;
5556 unsigned int this_line = 0;
5557 char theline[SH_BUFSIZE];
5558
5559 SL_ENTER(_("first_hex_block"));
5560
5561 *max = 0;
5562
5563 while (1)
5564 {
5565 theline[0] = '\0';
5566 this_line = 0;
5567 c = '\0';
5568 while (c != '\n' && this_line < (sizeof(theline)-1))
5569 {
5570 do {
5571 num = sl_read (fd, &c, 1);
5572 } while (num == 0 && errno == EINTR);
5573 if (num > 0)
5574 theline[this_line] = c;
5575 else
5576 SL_RETURN((0), _("first_hex_block"));
5577 ++this_line;
5578 }
5579 theline[this_line] = '\0';
5580
5581 /* not only 'newline' */
5582 if (this_line > 60)
5583 {
5584 nothex = 0;
5585 i = 0;
5586 while (nothex == 0 && i < (this_line-1))
5587 {
5588 if (! isxdigit((int)theline[i])) nothex = 1;
5589 ++i;
5590 }
5591 if (nothex == 1) retval += this_line;
5592 }
5593 else
5594 {
5595 nothex = 1;
5596 retval += this_line;
5597 }
5598
5599 if (nothex == 0)
5600 {
5601 *max = 0;
5602 do {
5603 do {
5604 num = sl_read (fd, theline, SH_BUFSIZE);
5605 } while (num == 0 && errno == EINTR);
5606 if (num > 0)
5607 {
5608 lnum = (unsigned long) num;
5609 for (i = 0; i < lnum; ++i)
5610 {
5611 c = theline[i];
5612 if (c == '\n' || c == '\t' || c == '\r' || c == ' ')
5613 ;
5614 else if (!isxdigit((int)c))
5615 break;
5616 else
5617 *max += 1;
5618 }
5619 }
5620 } while (num > 0);
5621
5622 *max /= 16;
5623 SL_RETURN((retval), _("first_hex_block"));
5624 }
5625
5626 }
5627 /* SL_RETURN((0), _("first_hex_block")); *//* unreachable */
5628}
5629
5630 /* if !defined(SH_STEALTH_MICRO) */
5631#endif
5632
5633 /* ifdef SH_STEALTH */
5634#endif
5635
5636/*
5637 * anti-debugger code
5638 */
5639#if defined(SCREW_IT_UP)
5640
5641#if defined(HAVE_PTHREAD)
5642
5643static pthread_key_t gSigtrapVariables_key;
5644static pthread_once_t gSigtrapVariables_key_once = PTHREAD_ONCE_INIT;
5645
5646static inline void make_gSigtrapVariables_key()
5647{
5648 (void) pthread_key_create(&gSigtrapVariables_key, free);
5649}
5650
5651struct sh_sigtrap_variables * sh_sigtrap_variables_get()
5652{
5653 void * ptr;
5654
5655 (void) pthread_once(&gSigtrapVariables_key_once, make_gSigtrapVariables_key);
5656
5657 ptr = pthread_getspecific(gSigtrapVariables_key);
5658 if (ptr == NULL) {
5659 ptr = calloc(1,sizeof(struct sh_sigtrap_variables));
5660 if (ptr == NULL) {
5661 return NULL;
5662 }
5663 (void) pthread_setspecific(gSigtrapVariables_key, ptr);
5664 }
5665
5666 return (struct sh_sigtrap_variables *) ptr;
5667}
5668
5669/* !defined(HAVE_PTHREAD) */
5670#else
5671
5672static struct sh_sigtrap_variables global_sigtrap_variables;
5673struct sh_sigtrap_variables * sh_sigtrap_variables_get()
5674{
5675 return &global_sigtrap_variables;
5676}
5677
5678#endif
5679
5680int sh_sigtrap_max_duration_set (const char * str)
5681{
5682 /* For security (prevent reloading with larger value)
5683 * this value can only be set once.
5684 */
5685 static int once = 0;
5686 int i;
5687
5688 SL_ENTER(_("sh_sigtrap_max_duration_set"));
5689
5690 i = atoi (str);
5691
5692 if (i >= 0 && once == 0)
5693 {
5694 sh.sigtrap_max_duration = i;
5695 once = 1;
5696 }
5697 else
5698 {
5699 SL_RETURN ((-1), _("sh_sigtrap_max_duration_set"));
5700 }
5701 SL_RETURN( (0), _("sh_sigtrap_max_duration_set"));
5702}
5703
5704void sh_sigtrap_handler (int signum)
5705{
5706 struct sh_sigtrap_variables * sigtrap_variables;
5707 sigtrap_variables = sh_sigtrap_variables_get();
5708 if (sigtrap_variables == NULL) {
5709 /* Perhaps, it's better to not die, and to continue using Samhain,
5710 even if this part does not work. */
5711 return;
5712 }
5713
5714#ifdef HAVE_GETTIMEOFDAY
5715 {
5716 struct timeval tv;
5717 long difftv;
5718
5719 gettimeofday(&tv, NULL);
5720 difftv = (tv.tv_sec - sigtrap_variables->save_tv.tv_sec) * 1000000 +
5721 (tv.tv_usec - sigtrap_variables->save_tv.tv_usec);
5722 if (difftv > sh.sigtrap_max_duration)
5723 raise(SIGKILL);
5724 }
5725#endif
5726
5727 sigtrap_variables->not_traced = signum;
5728 /* cppcheck-suppress memleak */
5729 return;
5730}
5731#endif
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