source: trunk/src/sh_unix.c@ 443

Last change on this file since 443 was 436, checked in by katerina, 11 years ago

Fix for ticket #340 (spurious reports with growing log files).
File size: 130.9 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
106/* moved here from far below
107 */
108#include <netdb.h>
109
110#define SH_NEED_PWD_GRP
111#define SH_NEED_GETHOSTBYXXX
112#include "sh_static.h"
113
114#ifndef HAVE_LSTAT
115#define lstat stat
116#endif
117
118#if defined(S_IFLNK) && !defined(S_ISLNK)
119#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
120#else
121#if !defined(S_ISLNK)
122#define S_ISLNK(mode) (0)
123#endif
124#endif
125
126#if defined(S_IFSOCK) && !defined(S_ISSOCK)
127#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
128#else
129#if !defined(S_ISSOCK)
130#define S_ISSOCK(mode) (0)
131#endif
132#endif
133
134#if defined(S_IFDOOR) && !defined(S_ISDOOR)
135#define S_ISDOOR(mode) (((mode) & S_IFMT) == S_IFDOOR)
136#else
137#if !defined(S_ISDOOR)
138#define S_ISDOOR(mode) (0)
139#endif
140#endif
141
142#if defined(S_IFPORT) && !defined(S_ISPORT)
143#define S_ISPORT(mode) (((mode) & S_IFMT) == S_IFPORT)
144#else
145#if !defined(S_ISPORT)
146#define S_ISPORT(mode) (0)
147#endif
148#endif
149
150#define SH_KEY_NULL _("000000000000000000000000000000000000000000000000")
151
152#undef FIL__
153#define FIL__ _("sh_unix.c")
154
155unsigned long mask_PRELINK = MASK_PRELINK_;
156unsigned long mask_USER0 = MASK_USER_;
157unsigned long mask_USER1 = MASK_USER_;
158unsigned long mask_USER2 = MASK_USER_;
159unsigned long mask_USER3 = MASK_USER_;
160unsigned long mask_USER4 = MASK_USER_;
161unsigned long mask_ALLIGNORE = MASK_ALLIGNORE_;
162unsigned long mask_ATTRIBUTES = MASK_ATTRIBUTES_;
163unsigned long mask_LOGFILES = MASK_LOGFILES_;
164unsigned long mask_LOGGROW = MASK_LOGGROW_;
165unsigned long mask_READONLY = MASK_READONLY_;
166unsigned long mask_NOIGNORE = MASK_NOIGNORE_;
167
168
169extern char **environ;
170
171int sh_unix_maskreset()
172{
173 mask_PRELINK = MASK_PRELINK_;
174 mask_USER0 = MASK_USER_;
175 mask_USER1 = MASK_USER_;
176 mask_USER2 = MASK_USER_;
177 mask_USER3 = MASK_USER_;
178 mask_USER4 = MASK_USER_;
179 mask_ALLIGNORE = MASK_ALLIGNORE_;
180 mask_ATTRIBUTES = MASK_ATTRIBUTES_;
181 mask_LOGFILES = MASK_LOGFILES_;
182 mask_LOGGROW = MASK_LOGGROW_;
183 mask_READONLY = MASK_READONLY_;
184 mask_NOIGNORE = MASK_NOIGNORE_;
185 return 0;
186}
187
188
189#ifdef SYS_SIGLIST_DECLARED
190/* extern const char * const sys_siglist[]; */
191#else
192char * sh_unix_siglist (int signum)
193{
194 switch (signum)
195 {
196#ifdef SIGHUP
197 case SIGHUP:
198 return _("Hangup");
199#endif
200#ifdef SIGINT
201 case SIGINT:
202 return _("Interrupt");
203#endif
204#ifdef SIGQUIT
205 case SIGQUIT:
206 return _("Quit");
207#endif
208#ifdef SIGILL
209 case SIGILL:
210 return _("Illegal instruction");
211#endif
212#ifdef SIGTRAP
213 case SIGTRAP:
214 return _("Trace/breakpoint trap");
215#endif
216#ifdef SIGABRT
217 case SIGABRT:
218 return _("IOT trap/Abort");
219#endif
220#ifdef SIGBUS
221 case SIGBUS:
222 return _("Bus error");
223#endif
224#ifdef SIGFPE
225 case SIGFPE:
226 return _("Floating point exception");
227#endif
228#ifdef SIGUSR1
229 case SIGUSR1:
230 return _("User defined signal 1");
231#endif
232#ifdef SIGSEGV
233 case SIGSEGV:
234 return _("Segmentation fault");
235#endif
236#ifdef SIGUSR2
237 case SIGUSR2:
238 return _("User defined signal 2");
239#endif
240#ifdef SIGPIPE
241 case SIGPIPE:
242 return _("Broken pipe");
243#endif
244#ifdef SIGALRM
245 case SIGALRM:
246 return _("Alarm clock");
247#endif
248#ifdef SIGTERM
249 case SIGTERM:
250 return _("Terminated");
251#endif
252#ifdef SIGSTKFLT
253 case SIGSTKFLT:
254 return _("Stack fault");
255#endif
256#ifdef SIGCHLD
257 case SIGCHLD:
258 return _("Child exited");
259#endif
260#ifdef SIGCONT
261 case SIGCONT:
262 return _("Continued");
263#endif
264#ifdef SIGSTOP
265 case SIGSTOP:
266 return _("Stopped");
267#endif
268#ifdef SIGTSTP
269 case SIGTSTP:
270 return _("Stop typed at tty");
271#endif
272#ifdef SIGTTIN
273 case SIGTTIN:
274 return _("Stopped (tty input)");
275#endif
276#ifdef SIGTTOU
277 case SIGTTOU:
278 return _("Stopped (tty output)");
279#endif
280#ifdef SIGURG
281 case SIGURG:
282 return _("Urgent condition");
283#endif
284#ifdef SIGXCPU
285 case SIGXCPU:
286 return _("CPU time limit exceeded");
287#endif
288#ifdef SIGXFSZ
289 case SIGXFSZ:
290 return _("File size limit exceeded");
291#endif
292#ifdef SIGVTALRM
293 case SIGVTALRM:
294 return _("Virtual time alarm");
295#endif
296#ifdef SIGPROF
297 case SIGPROF:
298 return _("Profile signal");
299#endif
300#ifdef SIGWINCH
301 case SIGWINCH:
302 return _("Window size changed");
303#endif
304#ifdef SIGIO
305 case SIGIO:
306 return _("Possible I/O");
307#endif
308#ifdef SIGPWR
309 case SIGPWR:
310 return _("Power failure");
311#endif
312#ifdef SIGUNUSED
313 case SIGUNUSED:
314 return _("Unused signal");
315#endif
316 }
317 return _("Unknown");
318}
319#endif
320
321
322/* Log from within a signal handler without using any
323 * functions that are not async signal safe.
324 *
325 * This is the safe_itoa helper function.
326 */
327char * safe_itoa(int i, char * str, int size)
328{
329 unsigned int u;
330 int iisneg = 0;
331 char *p = &str[size-1];
332
333 *p = '\0';
334 if (i < 0) {
335 iisneg = 1;
336 u = ((unsigned int)(-(1+i))) + 1;
337 } else {
338 u = i;
339 }
340 do {
341 --p;
342 *p = '0' + (u % 10);
343 u /= 10;
344 } while (u && (p != str));
345 if ((iisneg == 1) && (p != str)) {
346 --p;
347 *p = '-';
348 }
349 return p;
350}
351
352/* Log from within a signal handler without using any
353 * functions that are not async signal safe.
354 *
355 * This is the safe_logger function.
356 * Arguments: signal (signal number), method (0=logger, 1=stderr), thepid (pid)
357 */
358extern int OnlyStderr;
359
360int safe_logger (int thesignal, int method, char * details)
361{
362 unsigned int i = 0;
363 int status = -1;
364 struct stat buf;
365 pid_t newpid;
366 char str[128];
367 char * p;
368
369 char l0[64], l1[64], l2[64], l3[64];
370 char a0[32], a1[32], a2[32];
371 char e0[128];
372 char msg[128];
373
374 char * locations[] = { NULL, NULL, NULL, NULL, NULL };
375 char * envp[] = { NULL, NULL };
376 char * argp[] = { NULL, NULL, NULL, NULL, NULL };
377
378 pid_t thepid = getpid();
379
380 if ((sh.flag.isdaemon == S_FALSE) || (OnlyStderr == S_TRUE))
381 method = 1;
382
383 /* seems that solaris cc needs this way of initializing ...
384 */
385 locations[0] = l0;
386 locations[1] = l1;
387 locations[2] = l2;
388 locations[3] = l3;
389
390 envp[0] = e0;
391
392 argp[0] = a0;
393 argp[1] = a1;
394 argp[2] = a2;
395
396 sl_strlcpy(msg, _("samhain["), 128);
397 p = safe_itoa((int) thepid, str, 128);
398 if (p && *p)
399 sl_strlcat(msg, p, 128);
400 if (thesignal == 0)
401 {
402 if (details == NULL) {
403 sl_strlcat(msg, _("]: out of memory"), 128);
404 } else {
405 sl_strlcat(msg, _("]: "), 128);
406 sl_strlcat(msg, details, 128);
407 }
408 }
409 else
410 {
411 sl_strlcat(msg, _("]: exit on signal "), 128);
412 p = safe_itoa(thesignal, str, 128);
413 if (p && *p)
414 sl_strlcat(msg, p, 128);
415 }
416
417 if (method == 1) {
418#ifndef STDERR_FILENO
419#define STDERR_FILENO 2
420#endif
421 int retval = 0;
422 do {
423 retval = write(STDERR_FILENO, msg, strlen(msg));
424 } while (retval < 0 && errno == EINTR);
425 do {
426 retval = write(STDERR_FILENO, "\n", 1);
427 } while (retval < 0 && errno == EINTR);
428 return 0;
429 }
430
431 sl_strlcpy (l0, _("/usr/bin/logger"), 64);
432 sl_strlcpy (l1, _("/usr/sbin/logger"), 64);
433 sl_strlcpy (l2, _("/usr/ucb/logger"), 64);
434 sl_strlcpy (l3, _("/bin/logger"), 64);
435
436 sl_strlcpy (a0, _("logger"), 32);
437 sl_strlcpy (a1, _("-p"), 32);
438 sl_strlcpy (a2, _("daemon.alert"), 32);
439
440 sl_strlcpy (e0,
441 _("PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/ucb:/usr/local/bin"),
442 128);
443
444 while (locations[i] != NULL) {
445 status = stat(locations[i], &buf);
446 if (status == 0)
447 break;
448 ++i;
449 }
450
451 if (locations[i] != NULL) {
452 argp[3] = msg;
453 newpid = fork();
454 if (newpid == 0) {
455 execve(locations[i], argp, envp);
456 _exit(1);
457 }
458 else if (newpid > 0) {
459 waitpid(newpid, &status, WUNTRACED);
460 }
461 }
462 return 0;
463}
464
465void safe_fatal (const char * details,
466 const char * file, int line)
467{
468 char msg[128];
469 char str[128];
470 char * p;
471 int thesignal = 0;
472 int method = 0;
473
474 p = safe_itoa((int) line, str, 128);
475 sl_strlcpy(msg, _("FATAL: "), 128);
476 sl_strlcat(msg, file, 128);
477 sl_strlcat(msg, ": ", 128);
478 if (p && (*p)) {
479 sl_strlcat(msg, p , 128);
480 sl_strlcat(msg, ": ", 128);
481 }
482 sl_strlcat(msg, details, 128);
483 (void) safe_logger (thesignal, method, msg);
484 raise(SIGKILL);
485}
486
487extern char sh_sig_msg[64];
488
489volatile int immediate_exit_normal = 0;
490
491#if defined(SA_SIGACTION_WORKS)
492static
493void sh_unix_sigexit (int mysignal, siginfo_t * signal_info, void * signal_add)
494#else
495static
496void sh_unix_sigexit (int mysignal)
497#endif
498{
499
500#if defined(SA_SIGACTION_WORKS)
501 if (signal_info != NULL && signal_info->si_code == SI_USER &&
502 mysignal != SIGTERM && mysignal != SIGINT)
503 {
504 return;
505 }
506
507 /* avoid compiler warning (unused var)
508 */
509 (void) signal_add;
510#endif
511
512 /*
513 * Block re-entry
514 */
515 if (immediate_exit_normal > 0)
516 {
517 ++immediate_exit_normal;
518 if ((skey != NULL) && (immediate_exit_normal == 2))
519 memset (skey, '\0', sizeof(sh_key_t));
520 if (immediate_exit_normal == 2)
521 {
522 int val_return;
523
524 do {
525 val_return = chdir ("/");
526 } while (val_return < 0 && errno == EINTR);
527
528 safe_logger (mysignal, 0, NULL);
529 }
530 raise(SIGKILL);
531 }
532 else
533 {
534 immediate_exit_normal = 1;
535 }
536
537#ifdef SYS_SIGLIST_DECLARED
538 strncpy (sh_sig_msg, sys_siglist[mysignal], 40);
539#else
540 strncpy (sh_sig_msg, sh_unix_siglist(mysignal), 40);
541#endif
542 sh_sig_msg[63] = '\0';
543
544 ++sig_raised;
545 ++sig_urgent;
546 sig_termfast = 1;
547 return;
548}
549
550volatile int immediate_exit_fast = 0;
551
552#if defined(SA_SIGACTION_WORKS)
553static
554void sh_unix_sigexit_fast (int mysignal, siginfo_t * signal_info,
555 void * signal_add)
556#else
557static
558void sh_unix_sigexit_fast (int mysignal)
559#endif
560{
561#if defined(SL_DEBUG) && (defined(USE_SYSTEM_MALLOC) || !defined(USE_MALLOC_LOCK))
562 int retval;
563#endif
564
565#if defined(SA_SIGACTION_WORKS)
566 if (signal_info != NULL && signal_info->si_code == SI_USER)
567 {
568 return;
569 }
570#endif
571
572 /* avoid compiler warning (unused var)
573 */
574#if defined(SA_SIGACTION_WORKS)
575 (void) signal_add;
576#endif
577
578 /* Check whether the heap is ok; otherwise _exit
579 */
580#if !defined(SL_DEBUG) || (!defined(USE_SYSTEM_MALLOC) && defined(USE_MALLOC_LOCK))
581 ++immediate_exit_fast;
582 if (skey != NULL && immediate_exit_fast < 2)
583 memset (skey, '\0', sizeof(sh_key_t));
584 if (immediate_exit_fast < 2)
585 safe_logger (mysignal, 0, NULL);
586 raise(SIGKILL);
587#else
588
589 /* debug code
590 */
591 if (immediate_exit_fast == 1)
592 {
593 ++immediate_exit_fast;
594 if (skey != NULL)
595 memset (skey, '\0', sizeof(sh_key_t));
596#ifdef WITH_MESSAGE_QUEUE
597 close_ipc ();
598#endif
599 safe_logger (mysignal, 0, NULL);
600 do {
601 retval = chdir ("/");
602 } while (retval < 0 && errno == EINTR);
603 raise(SIGFPE);
604 }
605 else if (immediate_exit_fast == 2)
606 {
607 do {
608 retval = chdir ("/");
609 } while (retval < 0 && errno == EINTR);
610 raise(SIGFPE);
611 }
612 else if (immediate_exit_fast != 0)
613 {
614 raise(SIGKILL);
615 }
616
617 ++immediate_exit_fast;
618
619 /* The FPE|BUS|SEGV|ILL signals leave the system in an undefined
620 * state, thus it is best to exit immediately.
621 */
622#ifdef SYS_SIGLIST_DECLARED
623 strncpy (sh_sig_msg, sys_siglist[mysignal], 40);
624#else
625 strncpy (sh_sig_msg, sh_unix_siglist(mysignal), 40);
626#endif
627 sh_sig_msg[63] = '\0';
628
629 sl_stack_print();
630
631 /* Try to push out an error message.
632 */
633 sh_error_handle ((-1), FIL__, __LINE__, mysignal, MSG_EXIT_NORMAL,
634 sh.prg_name, sh_sig_msg);
635
636 if (skey != NULL)
637 memset (skey, '\0', sizeof(sh_key_t));
638#ifdef WITH_MESSAGE_QUEUE
639 close_ipc ();
640#endif
641
642 do {
643 retval = chdir ("/");
644 } while (retval < 0 && errno == EINTR);
645
646 raise(SIGFPE);
647#endif
648}
649
650
651static
652void sh_unix_sigaction (int mysignal)
653{
654 ++sig_raised;
655#ifdef SIGUSR1
656 if (mysignal == SIGUSR1)
657 sig_debug_switch = 1;
658#endif
659#ifdef SIGUSR2
660 if (mysignal == SIGUSR2)
661 {
662 ++sig_suspend_switch;
663 ++sig_urgent;
664 }
665#endif
666#ifdef SIGHUP
667 if (mysignal == SIGHUP)
668 sig_config_read_again = 1;
669#endif
670#ifdef SIGTTOU
671 if (mysignal == SIGTTOU)
672 sig_force_check = 1;
673#endif
674#ifdef SIGTTIN
675 if (mysignal == SIGTTIN)
676 sig_fresh_trail = 1;
677#endif
678#ifdef SIGABRT
679 if (mysignal == SIGABRT)
680 sig_fresh_trail = 1;
681#endif
682#ifdef SIGQUIT
683 if (mysignal == SIGQUIT)
684 {
685 sig_terminate = 1;
686 ++sig_urgent;
687 }
688#endif
689#ifdef SIGTERM
690 if (mysignal == SIGTERM)
691 {
692 strncpy (sh_sig_msg, _("Terminated"), 40);
693 sig_termfast = 1;
694 ++sig_urgent;
695 }
696#endif
697
698 return;
699}
700
701void sh_unix_ign_sigpipe()
702{
703 struct sigaction ignact;
704
705 ignact.sa_handler = SIG_IGN; /* signal action */
706 sigemptyset( &ignact.sa_mask ); /* set an empty mask */
707 ignact.sa_flags = 0; /* init sa_flags */
708
709#ifdef SIGPIPE
710 retry_sigaction(FIL__, __LINE__, SIGPIPE, &ignact, NULL);
711#endif
712
713 return;
714}
715static
716void sh_unix_siginstall (int goDaemon)
717{
718 struct sigaction act, act_fast, act2, oldact, ignact;
719#if defined (SH_WITH_SERVER)
720 (void) goDaemon;
721#endif
722
723 SL_ENTER(_("sh_unix_siginstall"));
724
725 ignact.sa_handler = SIG_IGN; /* signal action */
726 sigemptyset( &ignact.sa_mask ); /* set an empty mask */
727 ignact.sa_flags = 0; /* init sa_flags */
728
729#if defined(SA_SIGACTION_WORKS)
730 act.sa_sigaction = &sh_unix_sigexit; /* signal action */
731#else
732 act.sa_handler = &sh_unix_sigexit; /* signal action */
733#endif
734
735 sigfillset ( &act.sa_mask ); /* set a full mask */
736
737
738 /* Block all but deadly signals.
739 */
740#ifdef SIGILL
741 sigdelset ( &act.sa_mask, SIGILL );
742#endif
743#ifndef SL_DEBUG
744#ifdef SIGFPE
745 sigdelset ( &act.sa_mask, SIGFPE );
746#endif
747#endif
748#ifdef SIGSEGV
749 sigdelset ( &act.sa_mask, SIGSEGV );
750#endif
751#ifdef SIGBUS
752 sigdelset ( &act.sa_mask, SIGBUS );
753#endif
754
755#if defined(SA_SIGACTION_WORKS)
756 act_fast.sa_sigaction = &sh_unix_sigexit_fast; /* signal action */
757#else
758 act_fast.sa_handler = &sh_unix_sigexit_fast; /* signal action */
759#endif
760
761 sigfillset ( &act_fast.sa_mask ); /* set a full mask */
762
763#ifdef SIGILL
764 sigdelset ( &act_fast.sa_mask, SIGILL );
765#endif
766#ifndef SL_DEBUG
767#ifdef SIGFPE
768 sigdelset ( &act_fast.sa_mask, SIGFPE );
769#endif
770#endif
771#ifdef SIGSEGV
772 sigdelset ( &act_fast.sa_mask, SIGSEGV );
773#endif
774#ifdef SIGBUS
775 sigdelset ( &act_fast.sa_mask, SIGBUS );
776#endif
777
778
779 /* Use siginfo to verify origin of signal, if possible.
780 */
781#if defined(SA_SIGACTION_WORKS)
782 act.sa_flags = SA_SIGINFO;
783 act_fast.sa_flags = SA_SIGINFO;
784#else
785 act.sa_flags = 0;
786 act_fast.sa_flags = 0;
787#endif
788
789 /* Do not block the signal from being received in its handler ...
790 * (is this a good or a bad idea ??).
791 */
792#if defined(SA_NOMASK)
793 act_fast.sa_flags |= SA_NOMASK;
794#elif defined(SA_NODEFER)
795 act_fast.sa_flags |= SA_NODEFER;
796#endif
797
798
799 act2.sa_handler = &sh_unix_sigaction; /* signal action */
800 sigemptyset( &act2.sa_mask ); /* set an empty mask */
801 act2.sa_flags = 0; /* init sa_flags */
802
803 /* signals to control the daemon */
804
805#ifdef SIGHUP
806 retry_sigaction(FIL__, __LINE__, SIGHUP, &act2, &oldact);
807#endif
808#ifdef SIGABRT
809 retry_sigaction(FIL__, __LINE__, SIGABRT, &act2, &oldact);
810#endif
811#ifdef SIGUSR1
812 retry_sigaction(FIL__, __LINE__, SIGUSR1, &act2, &oldact);
813#endif
814#ifdef SIGUSR2
815 retry_sigaction(FIL__, __LINE__, SIGUSR2, &act2, &oldact);
816#endif
817#ifdef SIGQUIT
818 retry_sigaction(FIL__, __LINE__, SIGQUIT, &act2, &oldact);
819#endif
820#ifdef SIGTERM
821 retry_sigaction(FIL__, __LINE__, SIGTERM, &act, &oldact);
822#endif
823
824 /* fatal signals that may cause termination */
825
826#ifdef SIGILL
827 retry_sigaction(FIL__, __LINE__, SIGILL, &act_fast, &oldact);
828#endif
829#ifndef SL_DEBUG
830#ifdef SIGFPE
831 retry_sigaction(FIL__, __LINE__, SIGFPE, &act_fast, &oldact);
832#endif
833#endif
834#ifdef SIGSEGV
835 retry_sigaction(FIL__, __LINE__, SIGSEGV, &act_fast, &oldact);
836#endif
837#ifdef SIGBUS
838 retry_sigaction(FIL__, __LINE__, SIGBUS, &act_fast, &oldact);
839#endif
840
841 /* other signals */
842
843#ifdef SIGINT
844 retry_sigaction(FIL__, __LINE__, SIGINT, &act, &oldact);
845#endif
846#ifdef SIGPIPE
847 retry_sigaction(FIL__, __LINE__, SIGPIPE, &ignact, &oldact);
848#endif
849#ifdef SIGALRM
850 retry_sigaction(FIL__, __LINE__, SIGALRM, &ignact, &oldact);
851#endif
852#ifdef SIGTSTP
853 retry_sigaction(FIL__, __LINE__, SIGTSTP, &ignact, &oldact);
854#endif
855
856#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
857#ifdef SIGTTOU
858 if (goDaemon == 1)
859 retry_sigaction(FIL__, __LINE__, SIGTTOU, &act2, &oldact);
860 else
861 retry_sigaction(FIL__, __LINE__, SIGTTOU, &ignact, &oldact);
862#endif
863#ifdef SIGTTIN
864 if (goDaemon == 1)
865 retry_sigaction(FIL__, __LINE__, SIGTTIN, &act2, &oldact);
866 else
867 retry_sigaction(FIL__, __LINE__, SIGTTIN, &ignact, &oldact);
868#endif
869#else
870#ifdef SIGTTOU
871 retry_sigaction(FIL__, __LINE__, SIGTTOU, &ignact, &oldact);
872#endif
873#ifdef SIGTTIN
874 retry_sigaction(FIL__, __LINE__, SIGTTIN, &ignact, &oldact);
875#endif
876#endif
877
878#ifdef SIGTRAP
879#if !defined(SCREW_IT_UP)
880 retry_sigaction(FIL__, __LINE__, SIGTRAP, &act, &oldact);
881#endif
882#endif
883
884#ifdef SIGPOLL
885 retry_sigaction(FIL__, __LINE__, SIGPOLL, &ignact, &oldact);
886#endif
887#if defined(SIGPROF) && !defined(SH_PROFILE)
888 retry_sigaction(FIL__, __LINE__, SIGPROF, &ignact, &oldact);
889#endif
890#ifdef SIGSYS
891 retry_sigaction(FIL__, __LINE__, SIGSYS, &act, &oldact);
892#endif
893#ifdef SIGURG
894 retry_sigaction(FIL__, __LINE__, SIGURG, &ignact, &oldact);
895#endif
896#if defined(SIGVTALRM) && !defined(SH_PROFILE)
897 retry_sigaction(FIL__, __LINE__, SIGVTALRM, &ignact, &oldact);
898#endif
899#ifdef SIGXCPU
900 retry_sigaction(FIL__, __LINE__, SIGXCPU, &act, &oldact);
901#endif
902#ifdef SIGXFSZ
903 retry_sigaction(FIL__, __LINE__, SIGXFSZ, &act, &oldact);
904#endif
905
906#ifdef SIGEMT
907 retry_sigaction(FIL__, __LINE__, SIGEMT, &ignact, &oldact);
908#endif
909#ifdef SIGSTKFLT
910 retry_sigaction(FIL__, __LINE__, SIGSTKFLT, &act, &oldact);
911#endif
912#ifdef SIGIO
913 retry_sigaction(FIL__, __LINE__, SIGIO, &ignact, &oldact);
914#endif
915#ifdef SIGPWR
916 retry_sigaction(FIL__, __LINE__, SIGPWR, &act, &oldact);
917#endif
918
919#ifdef SIGLOST
920 retry_sigaction(FIL__, __LINE__, SIGLOST, &ignact, &oldact);
921#endif
922#ifdef SIGUNUSED
923 retry_sigaction(FIL__, __LINE__, SIGUNUSED, &ignact, &oldact);
924#endif
925
926 SL_RET0(_("sh_unix_siginstall"));
927}
928
929/* ---------------------------------------------------------------- */
930
931/* checksum the own binary
932 */
933int sh_unix_self_hash (const char * c)
934{
935 char message[512];
936 char hashbuf[KEYBUF_SIZE];
937
938 SL_ENTER(_("sh_unix_self_hash"));
939
940 if (c == NULL)
941 {
942 sh.exec.path[0] = '\0';
943 SL_RETURN((0), _("sh_unix_self_hash"));
944 }
945 sl_strlcpy(sh.exec.path, c, SH_PATHBUF);
946
947 sl_strlcpy(sh.exec.hash,
948 sh_tiger_hash (c, TIGER_FILE, TIGER_NOLIM, hashbuf, sizeof(hashbuf)),
949 KEY_LEN+1);
950 sl_snprintf(message, 512, _("%s has checksum: %s"),
951 sh.exec.path, sh.exec.hash);
952 message[511] = '\0';
953 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
954 message, _("sh_unix_self_hash"));
955 if (0 == sl_strcmp(sh.exec.hash, SH_KEY_NULL ))
956 {
957 dlog(1, FIL__, __LINE__,
958 _("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"),
959 sh.exec.path, sl_get_errmsg(), (int) sl_ret_euid());
960 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_NOACCESS,
961 (long) sh.real.uid, c);
962 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
963 }
964 SL_RETURN((0), _("sh_unix_self_hash"));
965}
966
967int sh_unix_self_check ()
968{
969 char newhash[KEY_LEN+1];
970 char message[512];
971 char hashbuf[KEYBUF_SIZE];
972
973 SL_ENTER(_("sh_unix_self_check"));
974 if (sh.exec.path == NULL || sh.exec.path[0] == '\0')
975 SL_RETURN((0), _("sh_unix_self_check"));
976
977 sl_strlcpy(newhash,
978 sh_tiger_hash (sh.exec.path, TIGER_FILE, TIGER_NOLIM, hashbuf, sizeof(hashbuf)),
979 KEY_LEN+1);
980 if (0 == sl_strncmp(sh.exec.hash,
981 newhash,
982 KEY_LEN))
983 SL_RETURN((0), _("sh_unix_self_check"));
984
985
986 dlog(1, FIL__, __LINE__,
987 _("The checksum of the executable: %s has changed since startup (%s -> %s).\n"),
988 sh.exec.path, sh.exec.hash, newhash);
989
990 sl_snprintf(message, 512,
991 _("The checksum of %s has changed since startup (%s -> %s)"),
992 sh.exec.path, sh.exec.hash, newhash);
993 message[511] = '\0';
994
995 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
996 message, _("sh_unix_self_check"));
997 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_E_AUTH,
998 sh.exec.path);
999 SL_RETURN((-1), _("sh_unix_self_check"));
1000}
1001
1002
1003/* ---------------------------------------------------------------- */
1004
1005long sh_group_to_gid (const char * g, int * fail)
1006{
1007 struct group * w;
1008 gid_t gid = 0;
1009 int status = 0;
1010
1011#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1012 struct group grp;
1013 char * buffer;
1014#endif
1015
1016 *fail = -1;
1017
1018 if (g)
1019 {
1020 size_t i;
1021 size_t len = strlen(g);
1022
1023 *fail = 0;
1024
1025 for (i = 0; i < len; ++i)
1026 {
1027 char c = g[i];
1028
1029 if (!isdigit((int) c))
1030 goto is_a_name;
1031 }
1032 return atol(g);
1033
1034 is_a_name:
1035
1036#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1037 buffer = SH_ALLOC(SH_GRBUF_SIZE);
1038 status = sh_getgrnam_r(g, &grp, buffer, SH_GRBUF_SIZE, &w);
1039#else
1040 errno = 0;
1041 w = sh_getgrnam(g);
1042 status = errno;
1043#endif
1044
1045 if ((status == ERANGE) && (w == NULL))
1046 {
1047 static int seen = 0;
1048
1049 if (seen == 0)
1050 {
1051 char errbuf[SH_ERRBUF_SIZE];
1052
1053 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
1054 sh_error_message(status, errbuf, sizeof(errbuf)),
1055 _("sh_group_to_gid"), (long) -1, _("line too long in group entry"));
1056 ++seen;
1057 }
1058 *fail = -1;
1059 }
1060 else if (w == NULL)
1061 {
1062 char * tmp = sh_util_strdup(g);
1063 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1064 _("sh_group_to_gid"), tmp);
1065 SH_FREE(tmp);
1066 *fail = -1;
1067 }
1068 else
1069 {
1070 gid = w->gr_gid;
1071 }
1072#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1073 SH_FREE(buffer);
1074#endif
1075 }
1076
1077 return gid;
1078}
1079
1080/* ---------------------------------------------------------------- */
1081
1082
1083/* added Tue Feb 22 10:36:44 NFT 2000 Rainer Wichmann */
1084static int tf_add_trusted_user_int(const char * c)
1085{
1086 struct passwd * w;
1087 int count;
1088 uid_t pwid = (uid_t)-1;
1089
1090#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1091 struct passwd pwd;
1092 char * buffer;
1093#endif
1094
1095 SL_ENTER(_("tf_add_trusted_user_int"));
1096
1097 /* First check for a user name.
1098 */
1099#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1100 buffer = SH_ALLOC(SH_PWBUF_SIZE);
1101 sh_getpwnam_r(c, &pwd, buffer, SH_PWBUF_SIZE, &w);
1102#else
1103 w = sh_getpwnam(c);
1104#endif
1105
1106 if ((w != NULL) && ((pwid = w->pw_uid) > 0))
1107 goto succe;
1108
1109 /* Failed, so check for a numerical value.
1110 */
1111 pwid = strtol(c, (char **)NULL, 10);
1112 if (pwid > 0 && pwid < 65535)
1113 goto succe;
1114
1115 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1116 _("add trusted user"), c);
1117#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1118 SH_FREE(buffer);
1119#endif
1120 SL_RETURN((-1), _("tf_add_trusted_user_int"));
1121
1122 succe:
1123 count = sl_trust_add_user(pwid);
1124#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1125 SH_FREE(buffer);
1126#endif
1127 SL_RETURN((count), _("tf_add_trusted_user_int"));
1128}
1129
1130int tf_add_trusted_user(const char * c)
1131{
1132 int i;
1133 char * q;
1134 char * p = sh_util_strdup (c);
1135#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1136 char * saveptr;
1137#endif
1138
1139 SL_ENTER(_("tf_add_trusted_user"));
1140
1141#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1142 q = strtok_r(p, ", \t", &saveptr);
1143#else
1144 q = strtok(p, ", \t");
1145#endif
1146 if (!q)
1147 {
1148 SH_FREE(p);
1149 SL_RETURN((-1), _("tf_add_trusted_user"));
1150 }
1151 while (q)
1152 {
1153 i = tf_add_trusted_user_int(q);
1154 if (SL_ISERROR(i))
1155 {
1156 SH_FREE(p);
1157 SL_RETURN((i), _("tf_add_trusted_user"));
1158 }
1159#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_STRTOK_R)
1160 q = strtok_r(NULL, ", \t", &saveptr);
1161#else
1162 q = strtok(NULL, ", \t");
1163#endif
1164 }
1165 SH_FREE(p);
1166 SL_RETURN((0), _("tf_add_trusted_user"));
1167}
1168
1169extern uid_t sl_trust_baduid(void);
1170extern gid_t sl_trust_badgid(void);
1171
1172#if defined(HOST_IS_CYGWIN) || defined(__cygwin__) || defined(__CYGWIN32__) || defined(__CYGWIN__)
1173int tf_trust_check (const char * file, int mode)
1174{
1175 (void) file;
1176 (void) mode;
1177 return 0;
1178}
1179#else
1180int tf_trust_check (const char * file, int mode)
1181{
1182 char * tmp;
1183 char * tmp2;
1184 char * p;
1185 int status;
1186 int level;
1187 uid_t ff_euid = (uid_t) -1;
1188
1189 SL_ENTER(_("tf_trust_check"));
1190
1191 if (mode == SL_YESPRIV)
1192 sl_get_euid(&ff_euid);
1193 else
1194 sl_get_ruid(&ff_euid);
1195
1196#if defined(SH_WITH_SERVER)
1197 if (0 == sl_ret_euid()) /* privileges not dropped yet */
1198 {
1199#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1200 struct passwd pwd;
1201 char * buffer = SH_ALLOC(SH_PWBUF_SIZE);
1202 struct passwd * tempres;
1203 sh_getpwnam_r(DEFAULT_IDENT, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
1204#else
1205 struct passwd * tempres = sh_getpwnam(DEFAULT_IDENT);
1206#endif
1207
1208 if (!tempres)
1209 {
1210 dlog(1, FIL__, __LINE__,
1211 _("User %s does not exist. Please add the user to your system.\n"),
1212 DEFAULT_IDENT);
1213 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
1214 }
1215 else
1216 {
1217 ff_euid = tempres->pw_uid;
1218 }
1219#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
1220 SH_FREE(buffer);
1221#endif
1222 }
1223#endif
1224
1225 status = sl_trustfile_euid(file, ff_euid);
1226
1227 if ( SL_ENONE != status)
1228 {
1229 if (status == SL_ESTAT)
1230 level = SH_ERR_ALL;
1231 else
1232 level = SH_ERR_ERR;
1233
1234 tmp = sh_util_safe_name (file);
1235 p = sl_trust_errfile();
1236 if (p && *p != '\0')
1237 {
1238 tmp2 = sh_util_safe_name (sl_trust_errfile());
1239 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST2,
1240 sl_error_string(status), tmp, tmp2);
1241 SH_FREE(tmp2);
1242 }
1243 else
1244 {
1245 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST1,
1246 sl_error_string(status), tmp);
1247 }
1248 SH_FREE(tmp);
1249
1250 if (status == SL_EBADUID || status == SL_EBADGID ||
1251 status == SL_EBADOTH || status == SL_ETRUNC ||
1252 status == SL_EINTERNAL )
1253 {
1254 switch (status) {
1255 case SL_EINTERNAL:
1256 dlog(1, FIL__, __LINE__,
1257 _("An internal error occured in the trustfile function.\n"));
1258 break;
1259 case SL_ETRUNC:
1260 tmp = sh_util_safe_name (file);
1261 dlog(1, FIL__, __LINE__,
1262 _("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"),
1263 tmp);
1264 SH_FREE(tmp);
1265 break;
1266 case SL_EBADOTH:
1267 tmp = sh_util_safe_name (file);
1268 p = sl_trust_errfile();
1269 dlog(1, FIL__, __LINE__,
1270 _("The path element: %s\nin the filename: %s is world writeable.\n"),
1271 p, tmp);
1272 SH_FREE(tmp);
1273 break;
1274 case SL_EBADUID:
1275 tmp = sh_util_safe_name (file);
1276 p = sl_trust_errfile();
1277 dlog(1, FIL__, __LINE__,
1278 _("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"),
1279 (UID_CAST)sl_trust_baduid(), p, tmp);
1280 SH_FREE(tmp);
1281 break;
1282 case SL_EBADGID:
1283 tmp = sh_util_safe_name (file);
1284 p = sl_trust_errfile();
1285 dlog(1, FIL__, __LINE__,
1286 _("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"),
1287 p, tmp, (UID_CAST)sl_trust_badgid(),
1288 (UID_CAST)sl_trust_baduid());
1289 SH_FREE(tmp);
1290 break;
1291 default:
1292 break;
1293 }
1294
1295 SL_RETURN((-1), _("tf_trust_check"));
1296 }
1297 }
1298
1299 SL_RETURN((0), _("tf_trust_check"));
1300}
1301#endif
1302
1303#ifdef HAVE_INITGROUPS
1304#ifdef HOST_IS_OSF
1305int sh_unix_initgroups ( char * in_user, gid_t in_gid)
1306#else
1307int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1308#endif
1309{
1310 int status = -1;
1311 status = sh_initgroups (in_user, in_gid);
1312 if (status < 0)
1313 {
1314 if (errno == EPERM)
1315 return 0;
1316 if (errno == EINVAL)
1317 return 0;
1318 return -1;
1319 }
1320 return 0;
1321}
1322#else
1323int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1324{
1325 (void) in_user;
1326 (void) in_gid;
1327 return 0;
1328}
1329#endif
1330
1331#ifdef HAVE_INITGROUPS
1332char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len);
1333int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1334{
1335 int status = -1;
1336 char user[SH_MINIBUF];
1337
1338 SL_ENTER(_("sh_unix_initgroups2"));
1339
1340 if (NULL == sh_unix_getUIDname (SH_ERR_ERR, in_pid, user, sizeof(user)))
1341 SL_RETURN((-1), _("sh_unix_initgroups2"));
1342 status = sh_initgroups (user, in_gid);
1343 if (status < 0)
1344 {
1345 if (errno == EPERM)
1346 status = 0;
1347 if (errno == EINVAL)
1348 status = 0;
1349 }
1350 SL_RETURN((status), _("sh_unix_initgroups2"));
1351}
1352#else
1353int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1354{
1355 (void) in_pid;
1356 (void) in_gid;
1357 return 0;
1358}
1359#endif
1360
1361void sh_unix_closeall (int fd, int except, int inchild)
1362{
1363 int fdx = fd;
1364#ifdef _SC_OPEN_MAX
1365 int fdlimit = sysconf (_SC_OPEN_MAX);
1366#else
1367#ifdef OPEN_MAX
1368 int fdlimit = OPEN_MAX;
1369#else
1370 int fdlimit = _POSIX_OPEN_MAX;
1371#endif
1372#endif
1373
1374 SL_ENTER(_("sh_unix_closeall"));
1375
1376 /* can't happen - so fix it :-(
1377 */
1378 if (fdlimit < 0)
1379 fdlimit = 20; /* POSIX lower limit */
1380
1381 if (fdlimit > 65536)
1382 fdlimit = 65536;
1383
1384 if (!inchild)
1385 sl_dropall (fdx, except);
1386 else
1387 sl_dropall_dirty (fdx, except);
1388
1389 /* Close everything from fd (inclusive) up to fdlimit (exclusive).
1390 */
1391 while (fd < fdlimit)
1392 {
1393 if (fd == except)
1394 fd++;
1395 else if (slib_do_trace != 0 && fd == slib_trace_fd)
1396 fd++;
1397 else
1398 sl_close_fd(FIL__, __LINE__, fd++);
1399 }
1400
1401 SL_RET0(_("sh_unix_closeall"));
1402}
1403
1404static void sh_unix_setlimits(void)
1405{
1406 struct rlimit limits;
1407
1408 SL_ENTER(_("sh_unix_setlimits"));
1409
1410 limits.rlim_cur = RLIM_INFINITY;
1411 limits.rlim_max = RLIM_INFINITY;
1412
1413#ifdef RLIMIT_CPU
1414 setrlimit (RLIMIT_CPU, &limits);
1415#endif
1416#ifdef RLIMIT_FSIZE
1417 setrlimit (RLIMIT_FSIZE, &limits);
1418#endif
1419#ifdef RLIMIT_DATA
1420 setrlimit (RLIMIT_DATA, &limits);
1421#endif
1422#ifdef RLIMIT_STACK
1423 setrlimit (RLIMIT_STACK, &limits);
1424#endif
1425#ifdef RLIMIT_RSS
1426 setrlimit (RLIMIT_RSS, &limits);
1427#endif
1428#ifdef RLIMIT_NPROC
1429 setrlimit (RLIMIT_NPROC, &limits);
1430#endif
1431#ifdef RLIMIT_MEMLOCK
1432 setrlimit (RLIMIT_MEMLOCK, &limits);
1433#endif
1434
1435#if !defined(SL_DEBUG)
1436 /* no core dumps
1437 */
1438 limits.rlim_cur = 0;
1439 limits.rlim_max = 0;
1440#ifdef RLIMIT_CORE
1441 setrlimit (RLIMIT_CORE, &limits);
1442#endif
1443#else
1444#ifdef RLIMIT_CORE
1445 setrlimit (RLIMIT_CORE, &limits);
1446#endif
1447#endif
1448
1449 limits.rlim_cur = 1024;
1450 limits.rlim_max = 1024;
1451
1452#if defined(RLIMIT_NOFILE)
1453 setrlimit (RLIMIT_NOFILE, &limits);
1454#elif defined(RLIMIT_OFILE)
1455 setrlimit (RLIMIT_OFILE, &limits);
1456#endif
1457
1458 SL_RET0(_("sh_unix_setlimits"));
1459}
1460
1461static void sh_unix_copyenv(void)
1462{
1463 char ** env0 = environ;
1464 char ** env1;
1465 int envlen = 0;
1466 size_t len;
1467
1468 SL_ENTER(_("sh_unix_copyenv"));
1469
1470 while (env0 != NULL && env0[envlen] != NULL) {
1471 /* printf("%2d: %s\n", envlen, env0[envlen]); */
1472 ++envlen;
1473 }
1474 ++envlen;
1475
1476 /* printf("-> %2d: slots allocated\n", envlen); */
1477 env1 = malloc (sizeof(char *) * envlen); /* only once */
1478 if (env1 == NULL)
1479 {
1480 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1481 SL_RET0(_("sh_unix_copyenv"));
1482 }
1483 env0 = environ;
1484 envlen = 0;
1485
1486 while (env0 != NULL && env0[envlen] != NULL) {
1487 len = strlen(env0[envlen]) + 1;
1488 env1[envlen] = malloc (len); /* only once */
1489 if (env1[envlen] == NULL)
1490 {
1491 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1492 SL_RET0(_("sh_unix_copyenv"));
1493 }
1494 sl_strlcpy(env1[envlen], env0[envlen], len);
1495 ++envlen;
1496 }
1497 env1[envlen] = NULL;
1498
1499 environ = env1;
1500 SL_RET0(_("sh_unix_copyenv"));
1501}
1502
1503/* delete all environment variables
1504 */
1505static void sh_unix_zeroenv(void)
1506{
1507 char * c;
1508 char ** env;
1509
1510 SL_ENTER(_("sh_unix_zeroenv"));
1511
1512 sh_unix_copyenv();
1513 env = environ;
1514
1515 while (env != NULL && *env != NULL) {
1516 c = strchr ((*env), '=');
1517#ifdef WITH_MYSQL
1518 /*
1519 * Skip the MYSQL_UNIX_PORT environment variable; MySQL may need it.
1520 */
1521 if (0 == sl_strncmp((*env), _("MYSQL_UNIX_PORT="), 16))
1522 {
1523 ++(env);
1524 continue;
1525 }
1526 if (0 == sl_strncmp((*env), _("MYSQL_TCP_PORT="), 15))
1527 {
1528 ++(env);
1529 continue;
1530 }
1531 if (0 == sl_strncmp((*env), _("MYSQL_HOME="), 11))
1532 {
1533 ++(env);
1534 continue;
1535 }
1536#endif
1537#ifdef WITH_ORACLE
1538 /*
1539 * Skip the ORACLE_HOME and TNS_ADMIN environment variables;
1540 * Oracle may need them.
1541 */
1542 if (0 == sl_strncmp((*env), _("ORACLE_HOME="), 12))
1543 {
1544 ++(env);
1545 continue;
1546 }
1547 if (0 == sl_strncmp((*env), _("TNS_ADMIN="), 10))
1548 {
1549 ++(env);
1550 continue;
1551 }
1552#endif
1553 /*
1554 * Skip the TZ environment variable.
1555 */
1556 if (0 == sl_strncmp((*env), _("TZ="), 3))
1557 {
1558 ++(env);
1559 continue;
1560 }
1561 ++(env);
1562 if (c != NULL)
1563 {
1564 ++c;
1565 while ((*c) != '\0') {
1566 (*c) = '\0';
1567 ++c;
1568 }
1569 }
1570 }
1571
1572#ifdef HAVE_TZSET
1573 tzset();
1574#endif
1575
1576 SL_RET0(_("sh_unix_zeroenv"));
1577}
1578
1579
1580static void sh_unix_resettimer(void)
1581{
1582 struct itimerval this_timer;
1583
1584 SL_ENTER(_("sh_unix_resettimer"));
1585
1586 this_timer.it_value.tv_sec = 0;
1587 this_timer.it_value.tv_usec = 0;
1588
1589 this_timer.it_interval.tv_sec = 0;
1590 this_timer.it_interval.tv_usec = 0;
1591
1592 setitimer(ITIMER_REAL, &this_timer, NULL);
1593#if !defined(SH_PROFILE)
1594 setitimer(ITIMER_VIRTUAL, &this_timer, NULL);
1595 setitimer(ITIMER_PROF, &this_timer, NULL);
1596#endif
1597
1598 SL_RET0(_("sh_unix_resettimer"));
1599}
1600
1601static void sh_unix_resetsignals(void)
1602{
1603 int sig_num;
1604#ifdef NSIG
1605 int max_sig = NSIG;
1606#else
1607 int max_sig = 255;
1608#endif
1609 int test;
1610 int status;
1611 struct sigaction act;
1612#if !defined(SH_PROFILE)
1613 struct sigaction oldact;
1614#endif
1615
1616 sigset_t set_proc;
1617
1618 SL_ENTER(_("sh_unix_resetsignals"));
1619 /*
1620 * Reset the current signal mask (inherited from parent process).
1621 */
1622
1623 sigfillset(&set_proc);
1624
1625 do {
1626 errno = 0;
1627 test = SH_SETSIGMASK(SIG_UNBLOCK, &set_proc, NULL);
1628 } while (test < 0 && errno == EINTR);
1629
1630 /*
1631 * Reset signal handling.
1632 */
1633
1634 act.sa_handler = SIG_DFL; /* signal action */
1635 sigemptyset( &act.sa_mask ); /* set an empty mask */
1636 act.sa_flags = 0; /* init sa_flags */
1637
1638 for (sig_num = 1; sig_num <= max_sig; ++sig_num)
1639 {
1640#if !defined(SH_PROFILE)
1641 test = retry_sigaction(FIL__, __LINE__, sig_num, &act, &oldact);
1642#else
1643 test = 0;
1644#endif
1645 if ((test == -1) && (errno != EINVAL))
1646 {
1647 char errbuf[SH_ERRBUF_SIZE];
1648 status = errno;
1649 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_SIG,
1650 sh_error_message (status, errbuf, sizeof(errbuf)), sig_num);
1651 }
1652 }
1653
1654 SL_RET0(_("sh_unix_resetsignals"));
1655}
1656
1657/* Get the local hostname (FQDN)
1658 */
1659static char * sh_tolower (char * s)
1660{
1661 char * ret = s;
1662 if (s)
1663 {
1664 for (; *s; ++s)
1665 {
1666 *s = tolower((unsigned char) *s);
1667 }
1668 }
1669 return ret;
1670}
1671
1672
1673#include <sys/socket.h>
1674
1675/* Required for BSD
1676 */
1677#ifdef HAVE_NETINET_IN_H
1678#include <netinet/in.h>
1679#endif
1680
1681#include <arpa/inet.h>
1682
1683const char * sh_unix_h_name (struct hostent * host_entry)
1684{
1685 char ** p;
1686 if (strchr(host_entry->h_name, '.')) {
1687 return host_entry->h_name;
1688 } else {
1689 for (p = host_entry->h_aliases; *p; ++p) {
1690 if (strchr(*p, '.'))
1691 return *p;
1692 }
1693 }
1694 return host_entry->h_name;
1695}
1696
1697/* uname() on FreeBSD is broken, because the 'nodename' buf is too small
1698 * to hold a valid (leftmost) domain label.
1699 */
1700#if defined(HAVE_UNAME) && !defined(HOST_IS_FREEBSD)
1701#include <sys/utsname.h>
1702void sh_unix_localhost()
1703{
1704 struct utsname buf;
1705 int i;
1706 int ddot;
1707 int len;
1708 char * p;
1709 char hostname[256];
1710 char numeric[SH_IP_BUF];
1711 char * canonical;
1712
1713
1714 SL_ENTER(_("sh_unix_localhost"));
1715
1716 (void) uname (&buf);
1717 /* flawfinder: ignore */ /* ff bug, ff sees system() */
1718 sl_strlcpy (sh.host.system, buf.sysname, SH_MINIBUF);
1719 sl_strlcpy (sh.host.release, buf.release, SH_MINIBUF);
1720 sl_strlcpy (sh.host.machine, buf.machine, SH_MINIBUF);
1721
1722 /* Workaround for cases where nodename could be
1723 * a truncated FQDN.
1724 */
1725 if (strlen(buf.nodename) == (sizeof(buf.nodename)-1))
1726 {
1727 p = strchr(buf.nodename, '.');
1728 if (NULL != p) {
1729 *p = '\0';
1730 sl_strlcpy(hostname, buf.nodename, 256);
1731 } else {
1732#ifdef HAVE_GETHOSTNAME
1733 if (0 != gethostname(hostname, 256))
1734 {
1735 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1736 _("nodename returned by uname may be truncated"),
1737 _("sh_unix_localhost"));
1738 sl_strlcpy (hostname, buf.nodename, 256);
1739 }
1740 else
1741 {
1742 hostname[255] = '\0';
1743 }
1744#else
1745 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1746 _("nodename returned by uname may be truncated"),
1747 _("sh_unix_localhost"));
1748 sl_strlcpy(hostname, buf.nodename, 256);
1749#endif
1750 }
1751 }
1752 else
1753 {
1754 sl_strlcpy(hostname, buf.nodename, 256);
1755 }
1756
1757 canonical = sh_ipvx_canonical(hostname, numeric, sizeof(numeric));
1758
1759 if (canonical == NULL)
1760 {
1761 sl_strlcpy (sh.host.name, hostname, SH_PATHBUF);
1762 sh_tolower (sh.host.name);
1763 }
1764 else
1765 {
1766 sl_strlcpy (sh.host.name, canonical, SH_PATHBUF);
1767 SH_FREE(canonical);
1768 }
1769
1770 /* check whether it looks like a FQDN
1771 */
1772 len = sl_strlen(sh.host.name);
1773 ddot = 0;
1774 for (i = 0; i < len; ++i)
1775 if (sh.host.name[i] == '.') ++ddot;
1776
1777 if (ddot == 0)
1778 {
1779 dlog(1, FIL__, __LINE__,
1780 _("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"),
1781 hostname, sh.host.name);
1782 sl_strlcpy (sh.host.name, numeric, SH_PATHBUF);
1783 SL_RET0(_("sh_unix_localhost"));
1784 }
1785
1786 if (sh_ipvx_is_numeric(sh.host.name))
1787 {
1788 dlog(1, FIL__, __LINE__,
1789 _("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"),
1790 hostname, sh.host.name);
1791 }
1792
1793 SL_RET0(_("sh_unix_localhost"));
1794}
1795
1796#else
1797
1798/*
1799 * --FreeBSD code
1800 */
1801#if defined(HAVE_UNAME)
1802#include <sys/utsname.h>
1803#endif
1804void sh_unix_localhost()
1805{
1806#if defined(HAVE_UNAME)
1807 struct utsname buf;
1808#endif
1809 int i;
1810 int ddot;
1811 int len;
1812 char hostname[1024];
1813 char numeric[SH_IP_BUF];
1814 char * canonical;
1815
1816 SL_ENTER(_("sh_unix_localhost"));
1817
1818#if defined(HAVE_UNAME)
1819 (void) uname (&buf);
1820 /* flawfinder: ignore */ /* ff bug, ff sees system() */
1821 sl_strlcpy (sh.host.system, buf.sysname, SH_MINIBUF);
1822 sl_strlcpy (sh.host.release, buf.release, SH_MINIBUF);
1823 sl_strlcpy (sh.host.machine, buf.machine, SH_MINIBUF);
1824#endif
1825
1826 (void) gethostname (hostname, 1024);
1827 hostname[1023] = '\0';
1828
1829 canonical = sh_ipvx_canonical(hostname, numeric, sizeof(numeric));
1830
1831 if (canonical == NULL)
1832 {
1833 sl_strlcpy (sh.host.name, hostname, SH_PATHBUF);
1834 sh_tolower (sh.host.name);
1835 }
1836 else
1837 {
1838 sl_strlcpy (sh.host.name, canonical, SH_PATHBUF);
1839 SH_FREE(canonical);
1840 }
1841
1842 /* check whether it looks like a FQDN
1843 */
1844 len = sl_strlen(sh.host.name);
1845 ddot = 0;
1846 for (i = 0; i < len; ++i)
1847 if (sh.host.name[i] == '.') ++ddot;
1848 if (ddot == 0)
1849 {
1850 dlog(1, FIL__, __LINE__,
1851 _("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"),
1852 hostname, sh.host.name);
1853 sl_strlcpy (sh.host.name, numeric, SH_PATHBUF);
1854 SL_RET0(_("sh_unix_localhost"));
1855 }
1856
1857 if (sh_ipvx_is_numeric(sh.host.name))
1858 {
1859 dlog(1, FIL__, __LINE__,
1860 _("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"),
1861 hostname, sh.host.name);
1862 }
1863
1864 SL_RET0(_("sh_unix_localhost"));
1865}
1866#endif
1867
1868
1869void sh_unix_memlock()
1870{
1871 SL_ENTER(_("sh_unix_memlock"));
1872
1873 /* do this before dropping privileges
1874 */
1875#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
1876 if (skey->mlock_failed == SL_FALSE)
1877 {
1878 if ( (-1) == sh_unix_mlock( FIL__, __LINE__,
1879 (char *) skey, sizeof (sh_key_t)) )
1880 {
1881 SH_MUTEX_LOCK_UNSAFE(mutex_skey);
1882 skey->mlock_failed = SL_TRUE;
1883 SH_MUTEX_UNLOCK_UNSAFE(mutex_skey);
1884 }
1885 }
1886#else
1887 if (skey->mlock_failed == SL_FALSE)
1888 {
1889 SH_MUTEX_LOCK_UNSAFE(mutex_skey);
1890 skey->mlock_failed = SL_TRUE;
1891 SH_MUTEX_UNLOCK_UNSAFE(mutex_skey);
1892 }
1893#endif
1894
1895 SL_RET0(_("sh_unix_memlock"));
1896}
1897
1898#ifdef SH_WITH_SERVER
1899char * chroot_dir = NULL;
1900
1901int sh_unix_set_chroot(const char * str)
1902{
1903 size_t len;
1904 static int block = 0;
1905
1906 if (block == 1)
1907 return 0;
1908
1909 if (str && *str == '/')
1910 {
1911 len = strlen(str) + 1;
1912 chroot_dir = malloc(strlen(str) + 1); /* only once */
1913 if (!chroot_dir)
1914 {
1915 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1916 return 1;
1917 }
1918 sl_strlcpy(chroot_dir, str, len);
1919 block = 1;
1920 return 0;
1921 }
1922 return 1;
1923}
1924
1925int sh_unix_chroot(void)
1926{
1927 int status;
1928
1929 if (chroot_dir != NULL)
1930 {
1931 status = retry_aud_chdir(FIL__, __LINE__, chroot_dir);
1932 if ( (-1) == status )
1933 {
1934 char errbuf[SH_ERRBUF_SIZE];
1935 status = errno;
1936 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
1937 sh_error_message (status, errbuf, sizeof(errbuf)), chroot_dir);
1938 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1939 }
1940 /* flawfinder: ignore */
1941 return (chroot(chroot_dir));
1942 }
1943 return 0;
1944}
1945/* #ifdef SH_WITH_SERVER */
1946#else
1947int sh_unix_chroot(void) { return 0; }
1948#endif
1949
1950/* daemon mode
1951 */
1952static int block_setdeamon = 0;
1953
1954int sh_unix_setdeamon(const char * dummy)
1955{
1956 int res = 0;
1957
1958 SL_ENTER(_("sh_unix_setdeamon"));
1959
1960 if (block_setdeamon != 0)
1961 SL_RETURN((0),_("sh_unix_setdeamon"));
1962
1963 if (dummy == NULL)
1964 sh.flag.isdaemon = ON;
1965 else
1966 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
1967
1968 if (sh.flag.opts == S_TRUE)
1969 block_setdeamon = 1;
1970
1971 SL_RETURN(res, _("sh_unix_setdeamon"));
1972}
1973#if defined(HAVE_LIBPRELUDE)
1974#include "sh_prelude.h"
1975#endif
1976
1977int sh_unix_setnodeamon(const char * dummy)
1978{
1979 int res = 0;
1980
1981 SL_ENTER(_("sh_unix_setnodeamon"));
1982
1983 if (block_setdeamon != 0)
1984 SL_RETURN((0),_("sh_unix_setmodeamon"));
1985
1986 if (dummy == NULL)
1987 sh.flag.isdaemon = OFF;
1988 else
1989 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
1990
1991 if (sh.flag.opts == S_TRUE)
1992 block_setdeamon = 1;
1993
1994 SL_RETURN(res, _("sh_unix_setnodeamon"));
1995}
1996
1997int sh_unix_init(int goDaemon)
1998{
1999 int status;
2000 uid_t uid;
2001 pid_t oldpid = getpid();
2002#if defined(SH_WITH_SERVER)
2003 extern int sh_socket_open_int (void);
2004#endif
2005 char errbuf[SH_ERRBUF_SIZE];
2006
2007 extern void sh_kill_sub();
2008
2009 SL_ENTER(_("sh_unix_init"));
2010
2011 /* fork twice, exit the parent process
2012 */
2013 if (goDaemon == 1) {
2014
2015 switch (aud_fork(FIL__, __LINE__)) {
2016 case 0: break; /* child process continues */
2017 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
2018 default: /* parent process exits */
2019 sh_kill_sub();
2020 aud__exit(FIL__, __LINE__, 0);
2021 }
2022
2023 /* Child processes do not inherit page locks across a fork.
2024 * Error in next fork would return in this (?) thread of execution.
2025 */
2026 sh_unix_memlock();
2027
2028 setsid(); /* should not fail */
2029 sh.pid = (UINT64) getpid();
2030
2031 switch (aud_fork(FIL__, __LINE__)) {
2032 case 0: break; /* child process continues */
2033 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
2034 default: /* parent process exits */
2035 sh_kill_sub();
2036 aud__exit(FIL__, __LINE__, 0);
2037 }
2038
2039 /* Child processes do not inherit page locks across a fork.
2040 */
2041 sh_unix_memlock();
2042 sh.pid = (UINT64) getpid();
2043
2044 } else {
2045 setsid(); /* should not fail */
2046 }
2047
2048 /* set working directory
2049 */
2050#ifdef SH_PROFILE
2051 status = 0;
2052#else
2053 status = retry_aud_chdir(FIL__, __LINE__, "/");
2054#endif
2055 if ( (-1) == status )
2056 {
2057 status = errno;
2058 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
2059 sh_error_message (status, errbuf, sizeof(errbuf)), "/");
2060 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2061 }
2062
2063 /* reset timers
2064 */
2065 sh_unix_resettimer();
2066
2067 /* signal handlers
2068 */
2069 sh_unix_resetsignals();
2070#if defined(SCREW_IT_UP)
2071 sh_sigtrap_prepare();
2072#endif
2073 sh_unix_siginstall (goDaemon);
2074
2075 /* set file creation mask
2076 */
2077 (void) umask (0); /* should not fail */
2078
2079 /* set resource limits to maximum, and
2080 * core dump size to zero
2081 */
2082 sh_unix_setlimits();
2083
2084 /* zero out the environment (like PATH='\0')
2085 */
2086 sh_unix_zeroenv();
2087
2088 if (goDaemon == 1)
2089 {
2090 /* Close first tree file descriptors
2091 */
2092 sl_close_fd (FIL__, __LINE__, 0); /* if running as daemon */
2093 sl_close_fd (FIL__, __LINE__, 1); /* if running as daemon */
2094 sl_close_fd (FIL__, __LINE__, 2); /* if running as daemon */
2095
2096 /* Enable full error logging
2097 */
2098 sh_error_only_stderr (S_FALSE);
2099
2100 /* open first three streams to /dev/null
2101 */
2102 status = aud_open(FIL__, __LINE__, SL_NOPRIV, _("/dev/null"), O_RDWR, 0);
2103 if (status < 0)
2104 {
2105 status = errno;
2106 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2107 sh_error_message(status, errbuf, sizeof(errbuf)), _("open"));
2108 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2109 }
2110
2111 status = retry_aud_dup(FIL__, __LINE__, 0);
2112 if (status >= 0)
2113 retry_aud_dup(FIL__, __LINE__, 0);
2114
2115 if (status < 0)
2116 {
2117 status = errno;
2118 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2119 sh_error_message(status, errbuf, sizeof(errbuf)), _("dup"));
2120 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2121 }
2122
2123 sh_error_enable_unsafe (S_TRUE);
2124#if defined(HAVE_LIBPRELUDE)
2125 sh_prelude_reset ();
2126#endif
2127
2128 /* --- wait until parent has exited ---
2129 */
2130 while (1 == 1)
2131 {
2132 errno = 0;
2133 if (0 > aud_kill (FIL__, __LINE__, oldpid, 0) && errno == ESRCH)
2134 {
2135 break;
2136 }
2137 retry_msleep(0, 1);
2138 }
2139
2140 /* write PID file
2141 */
2142 status = sh_unix_write_pid_file();
2143 if (status < 0)
2144 {
2145 sl_get_euid(&uid);
2146 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_PIDFILE,
2147 (long) uid, sh.srvlog.alt);
2148 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2149 }
2150#if defined(SH_WITH_SERVER)
2151 sh_socket_open_int ();
2152#endif
2153 }
2154 else
2155 {
2156 sh_error_enable_unsafe (S_TRUE);
2157#if defined(HAVE_LIBPRELUDE)
2158 sh_prelude_reset ();
2159#endif
2160#if defined(SH_WITH_SERVER)
2161 sh_socket_open_int ();
2162#endif
2163 }
2164
2165 /* chroot (this is a no-op if no chroot dir is specified
2166 */
2167 status = sh_unix_chroot();
2168 if (status < 0)
2169 {
2170 status = errno;
2171 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
2172 sh_error_message(status, errbuf, sizeof(errbuf)), _("chroot"));
2173 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
2174 }
2175
2176 /* drop capabilities
2177 */
2178 sl_drop_cap();
2179
2180 SL_RETURN((0),_("sh_unix_init"));
2181}
2182
2183/* --- run a command, securely --- */
2184
2185int sh_unix_run_command (const char * str)
2186{
2187 pid_t pid;
2188 char * arg[4];
2189 char * env[5];
2190 char * path = sh_util_strdup(_("/bin/sh"));
2191
2192 int status = -1;
2193
2194 arg[0] = sh_util_strdup(_("/bin/sh"));
2195 arg[1] = sh_util_strdup(_("-c"));
2196 arg[2] = sh_util_strdup(str);
2197 arg[3] = NULL;
2198
2199 env[0] = sh_util_strdup(_("PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/ucb"));
2200 env[1] = sh_util_strdup(_("SHELL=/bin/sh"));
2201 env[2] = sh_util_strdup(_("IFS= \t\n"));
2202 if (getenv("TZ")) { /* flawfinder: ignore */
2203 char * tz = sh_util_strdup(getenv("TZ")); /* flawfinder: ignore */
2204 size_t tzlen = strlen(tz);
2205 if (SL_TRUE == sl_ok_adds (4, tzlen)) {
2206 env[3] = SH_ALLOC(4+tzlen);
2207 sl_strlcpy(env[3], "TZ=", 4);
2208 sl_strlcat(env[3], tz , 4+tzlen);
2209 } else {
2210 env[3] = NULL;
2211 }
2212 } else {
2213 env[3] = NULL;
2214 }
2215 env[4] = NULL;
2216
2217 pid = fork();
2218
2219 if (pid == (pid_t)(-1))
2220 {
2221 return -1;
2222 }
2223
2224 else if (pid == 0) /* child */
2225 {
2226 memset(skey, 0, sizeof(sh_key_t));
2227 (void) umask(S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
2228 sh_unix_closeall (3, -1, SL_TRUE); /* in child process */
2229 execve(path, arg, env);
2230 _exit(EXIT_FAILURE);
2231 }
2232
2233 else /* parent */
2234 {
2235 int r;
2236
2237 while((r = waitpid(pid, &status, WUNTRACED)) != pid && r != -1) ;
2238
2239#if !defined(USE_UNO)
2240 if (r == -1 || !WIFEXITED(status))
2241 {
2242 status = -1;
2243 }
2244 else
2245 {
2246 status = WEXITSTATUS(status);
2247 }
2248#endif
2249 }
2250
2251 return status;
2252}
2253
2254/********************************************************
2255 *
2256 * TIME
2257 *
2258 ********************************************************/
2259
2260/* Figure out the time offset of the current timezone
2261 * in a portable way.
2262 */
2263char * t_zone(const time_t * xx)
2264{
2265 struct tm aa;
2266 struct tm bb;
2267
2268 int sign = 0;
2269 int diff = 0;
2270 int hh, mm;
2271 static char tz[64];
2272
2273 SL_ENTER(_("t_zone"));
2274
2275#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2276 gmtime_r (xx, &aa);
2277#else
2278 memcpy (&aa, gmtime(xx), sizeof(struct tm));
2279#endif
2280
2281#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2282 localtime_r (xx, &bb);
2283#else
2284 memcpy (&bb, localtime(xx), sizeof(struct tm));
2285#endif
2286
2287 /* Check for datum wrap-around.
2288 */
2289 if (aa.tm_year < bb.tm_year)
2290 sign = (-1);
2291 else if (aa.tm_mon < bb.tm_mon)
2292 sign = (-1);
2293 else if (aa.tm_mday < bb.tm_mday)
2294 sign = (-1);
2295 else if (bb.tm_year < aa.tm_year)
2296 sign = ( 1);
2297 else if (bb.tm_mon < aa.tm_mon)
2298 sign = ( 1);
2299 else if (bb.tm_mday < aa.tm_mday)
2300 sign = ( 1);
2301
2302 diff = aa.tm_hour * 60 + aa.tm_min;
2303 diff = (bb.tm_hour * 60 + bb.tm_min) - diff;
2304 diff = diff - (sign * 24 * 60); /* datum wrap-around correction */
2305 hh = diff / 60;
2306 mm = diff - (hh * 60);
2307 sprintf (tz, _("%+03d%02d"), hh, mm); /* known to fit */
2308
2309 SL_RETURN(tz, _("t_zone"));
2310}
2311
2312unsigned long sh_unix_longtime ()
2313{
2314 return ((unsigned long)time(NULL));
2315}
2316
2317#ifdef HAVE_GETTIMEOFDAY
2318unsigned long sh_unix_notime ()
2319{
2320 struct timeval tv;
2321
2322 gettimeofday (&tv, NULL);
2323
2324 return ((unsigned long)(tv.tv_sec + tv.tv_usec * 10835 + getpid() + getppid()));
2325
2326}
2327#endif
2328
2329static int count_dev_time = 0;
2330
2331void reset_count_dev_time(void)
2332{
2333 count_dev_time = 0;
2334 return;
2335}
2336
2337int sh_unix_settimeserver (const char * address)
2338{
2339
2340 SL_ENTER(_("sh_unix_settimeserver"));
2341
2342 if (address != NULL && count_dev_time < 2
2343 && sl_strlen(address) < SH_PATHBUF)
2344 {
2345 if (count_dev_time == 0)
2346 sl_strlcpy (sh.srvtime.name, address, SH_PATHBUF);
2347 else
2348 sl_strlcpy (sh.srvtime.alt, address, SH_PATHBUF);
2349
2350 ++count_dev_time;
2351 SL_RETURN((0), _("sh_unix_settimeserver"));
2352 }
2353 SL_RETURN((-1), _("sh_unix_settimeserver"));
2354}
2355
2356
2357#ifdef HAVE_NTIME
2358#define UNIXEPOCH 2208988800UL /* difference between Unix time and net time
2359 * The UNIX EPOCH starts in 1970.
2360 */
2361#include <sys/socket.h>
2362#include <netinet/in.h>
2363#include <arpa/inet.h>
2364#include <netdb.h>
2365#include <ctype.h>
2366#endif
2367
2368/* Timeserver service. */
2369/* define is missing on HP-UX 10.20 */
2370#ifndef IPPORT_TIMESERVER
2371#define IPPORT_TIMESERVER 37
2372#endif
2373
2374char * sh_unix_time (time_t thetime, char * buffer, size_t len)
2375{
2376
2377 int status;
2378 char AsciiTime[81]; /* local time */
2379 time_t time_now;
2380 struct tm * time_ptr;
2381#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2382 struct tm time_tm;
2383#endif
2384#ifdef SH_USE_XML
2385 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2386#else
2387 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2388#endif
2389
2390#ifdef HAVE_NTIME
2391 int fd; /* network file descriptor */
2392 u_char net_time[4]; /* remote time in network format */
2393 static int failerr = 0; /* no net time */
2394 int fail = 0; /* no net time */
2395 int errflag;
2396 char errmsg[256];
2397 char error_call[SH_MINIBUF];
2398 int error_num;
2399#endif
2400
2401 SL_ENTER(_("sh_unix_time"));
2402
2403#ifdef HAVE_NTIME
2404 if (thetime == 0)
2405 {
2406 if (sh.srvtime.name[0] == '\0')
2407 {
2408 fail = 1;
2409 (void) time (&time_now);
2410 }
2411 else /* have a timeserver address */
2412 {
2413 /* don't call timeserver more than once per second */
2414 static time_t time_old = 0;
2415 time_t time_new;
2416 static time_t time_saved = 0;
2417 (void) time (&time_new);
2418 if ((time_new == time_old) && (time_saved != 0))
2419 {
2420 time_now = time_saved;
2421 goto end;
2422 }
2423 time_old = time_new;
2424
2425
2426 fd = connect_port_2 (sh.srvtime.name, sh.srvtime.alt,
2427 IPPORT_TIMESERVER,
2428 error_call, &error_num, errmsg, sizeof(errmsg));
2429 if (fd >= 0)
2430 {
2431 if (4 != read_port (fd, (char *) net_time, 4, &errflag, 2))
2432 {
2433 fail = 1;
2434 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2435 MSG_E_NLOST,
2436 _("time"), sh.srvtime.name);
2437 }
2438 sl_close_fd(FIL__, __LINE__, fd);
2439 }
2440 else
2441 {
2442 sh_error_handle ((-1), FIL__, __LINE__, error_num,
2443 MSG_E_NET, errmsg, error_call,
2444 _("time"), sh.srvtime.name);
2445 fail = 1;
2446 }
2447
2448 if (fail == 0)
2449 {
2450 unsigned long ltmp;
2451 UINT32 ttmp;
2452 memcpy(&ttmp, net_time, sizeof(UINT32)); ltmp = ttmp;
2453 time_now = ntohl(ltmp) - UNIXEPOCH;
2454 time_saved = time_now;
2455
2456 if (failerr == 1) {
2457 failerr = 0;
2458 sh_error_handle ((-1), FIL__, __LINE__, 0,
2459 MSG_E_NEST,
2460 _("time"), sh.srvtime.name);
2461 }
2462 }
2463 else
2464 {
2465 (void) time (&time_now);
2466 time_saved = 0;
2467
2468 if (failerr == 0)
2469 {
2470 failerr = 1;
2471 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2472 MSG_SRV_FAIL,
2473 _("time"), sh.srvtime.name);
2474 }
2475 }
2476 end:
2477 ; /* 'label at end of compound statement' */
2478 }
2479 }
2480 else
2481 {
2482 time_now = thetime;
2483 }
2484
2485 /* #ifdef HAVE_NTIME */
2486#else
2487
2488 if (thetime == 0)
2489 {
2490 (void) time (&time_now);
2491 }
2492 else
2493 {
2494 time_now = thetime;
2495 }
2496
2497 /* #ifdef HAVE_NTIME */
2498#endif
2499
2500 if (time_now == (-1) )
2501 {
2502 sl_strlcpy(buffer, _(deftime), len);
2503 SL_RETURN(buffer, _("sh_unix_time"));
2504 }
2505 else
2506 {
2507#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2508 time_ptr = localtime_r (&time_now, &time_tm);
2509#else
2510 time_ptr = localtime (&time_now);
2511#endif
2512 }
2513 if (time_ptr != NULL)
2514 {
2515 status = strftime (AsciiTime, sizeof(AsciiTime),
2516#ifdef SH_USE_XML
2517 _("%Y-%m-%dT%H:%M:%S%%s"),
2518#else
2519 _("[%Y-%m-%dT%H:%M:%S%%s]"),
2520#endif
2521 time_ptr);
2522
2523 sl_snprintf(buffer, len, AsciiTime, t_zone(&time_now));
2524
2525 if ( (status == 0) || (status == sizeof(AsciiTime)) )
2526 {
2527 sl_strlcpy(buffer, _(deftime), len);
2528 SL_RETURN( buffer, _("sh_unix_time"));
2529 }
2530 else
2531 {
2532 SL_RETURN(buffer, _("sh_unix_time"));
2533 }
2534 }
2535
2536 /* last resort
2537 */
2538 sl_strlcpy(buffer, _(deftime), len);
2539 SL_RETURN( buffer, _("sh_unix_time"));
2540}
2541
2542static int sh_unix_use_localtime = S_FALSE;
2543
2544/* whether to use localtime for file timesatams in logs
2545 */
2546int sh_unix_uselocaltime (const char * c)
2547{
2548 int i;
2549 SL_ENTER(_("sh_unix_uselocaltime"));
2550 i = sh_util_flagval(c, &(sh_unix_use_localtime));
2551
2552 SL_RETURN(i, _("sh_unix_uselocaltime"));
2553}
2554
2555char * sh_unix_gmttime (time_t thetime, char * buffer, size_t len)
2556{
2557
2558 int status;
2559
2560 struct tm * time_ptr;
2561#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS)
2562 struct tm time_tm;
2563#endif
2564 char AsciiTime[81]; /* GMT time */
2565#ifdef SH_USE_XML
2566 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2567#else
2568 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2569#endif
2570
2571 SL_ENTER(_("sh_unix_gmttime"));
2572
2573 if (sh_unix_use_localtime == S_FALSE)
2574 {
2575#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GMTIME_R)
2576 time_ptr = gmtime_r (&thetime, &time_tm);
2577#else
2578 time_ptr = gmtime (&thetime);
2579#endif
2580 }
2581 else
2582 {
2583#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_LOCALTIME_R)
2584 time_ptr = localtime_r (&thetime, &time_tm);
2585#else
2586 time_ptr = localtime (&thetime);
2587#endif
2588 }
2589 if (time_ptr != NULL)
2590 {
2591 status = strftime (AsciiTime, 80,
2592#ifdef SH_USE_XML
2593 _("%Y-%m-%dT%H:%M:%S"),
2594#else
2595 _("[%Y-%m-%dT%H:%M:%S]"),
2596#endif
2597 time_ptr);
2598
2599 if ( (status == 0) || (status == 80) )
2600 sl_strlcpy(buffer, _(deftime), len);
2601 else
2602 sl_strlcpy(buffer, AsciiTime, len);
2603 SL_RETURN( buffer, _("sh_unix_gmttime"));
2604 }
2605
2606 /* last resort
2607 */
2608 sl_strlcpy(buffer, _(deftime), len);
2609 SL_RETURN( buffer, _("sh_unix_gmttime"));
2610}
2611
2612
2613char * sh_unix_getUIDdir (int level, uid_t uid, char * out, size_t len)
2614{
2615 struct passwd * tempres;
2616 int status = 0;
2617
2618#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2619 struct passwd pwd;
2620 char * buffer;
2621#endif
2622 char errbuf[SH_ERRBUF_SIZE];
2623
2624 SL_ENTER(_("sh_unix_getUIDdir"));
2625
2626#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2627 buffer = SH_ALLOC(SH_PWBUF_SIZE);
2628 sh_getpwuid_r(uid, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
2629#else
2630 errno = 0;
2631 tempres = sh_getpwuid(uid);
2632 status = errno;
2633#endif
2634
2635 if (tempres == NULL) {
2636 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2637 sh_error_message(status, errbuf, sizeof(errbuf)),
2638 _("getpwuid"), (long) uid, _("completely missing"));
2639#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2640 SH_FREE(buffer);
2641#endif
2642 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2643 }
2644
2645 if (tempres->pw_dir != NULL) {
2646 sl_strlcpy(out, tempres->pw_dir, len);
2647#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2648 SH_FREE(buffer);
2649#endif
2650 SL_RETURN( out, _("sh_unix_getUIDdir"));
2651 } else {
2652 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2653 sh_error_message(status, errbuf, sizeof(errbuf)),
2654 _("getpwuid"), (long) uid, _("pw_dir"));
2655#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2656 SH_FREE(buffer);
2657#endif
2658 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2659 }
2660}
2661
2662/* ------------------- Caching ----------------*/
2663#include "zAVLTree.h"
2664
2665#define CACHE_GID 0
2666#define CACHE_UID 1
2667
2668struct user_id {
2669 char * name;
2670 uid_t id;
2671 struct user_id * next;
2672};
2673
2674static struct user_id * uid_list = NULL;
2675static struct user_id * gid_list = NULL;
2676
2677SH_MUTEX_STATIC(mutex_cache, PTHREAD_MUTEX_INITIALIZER);
2678
2679static void sh_userid_free(struct user_id * item)
2680{
2681 while (item)
2682 {
2683 struct user_id * user = item;
2684 item = item->next;
2685
2686 SH_FREE(user->name);
2687 SH_FREE(user);
2688 }
2689 return;
2690}
2691
2692void sh_userid_destroy ()
2693{
2694 struct user_id * tmp_uid;
2695 struct user_id * tmp_gid;
2696
2697 SH_MUTEX_LOCK_UNSAFE(mutex_cache);
2698 tmp_gid = gid_list;
2699 gid_list = NULL;
2700 tmp_uid = uid_list;
2701 uid_list = NULL;
2702 SH_MUTEX_UNLOCK_UNSAFE(mutex_cache);
2703
2704 sh_userid_free(tmp_uid);
2705 sh_userid_free(tmp_gid);
2706 return;
2707}
2708
2709static void sh_userid_additem(struct user_id * list, struct user_id * item)
2710{
2711 if (list)
2712 {
2713 while (list && list->next)
2714 list = list->next;
2715 list->next = item;
2716 }
2717 return;
2718}
2719
2720static void sh_userid_add(uid_t id, char * username, int which)
2721{
2722 size_t len;
2723 struct user_id * user = SH_ALLOC(sizeof(struct user_id));
2724
2725 if (username)
2726 len = strlen(username) + 1;
2727 else
2728 len = 1;
2729
2730 user->name = SH_ALLOC(len);
2731 user->id = id;
2732 if (username)
2733 sl_strlcpy(user->name, username, len);
2734 else
2735 user->name[0] = '\0';
2736 user->next = NULL;
2737
2738 SH_MUTEX_LOCK(mutex_cache);
2739 if (which == CACHE_UID)
2740 {
2741 if (!uid_list)
2742 uid_list = user;
2743 else
2744 sh_userid_additem(uid_list, user);
2745 }
2746 else
2747 {
2748 if (!gid_list)
2749 gid_list = user;
2750 else
2751 sh_userid_additem(gid_list, user);
2752 }
2753 SH_MUTEX_UNLOCK(mutex_cache);
2754
2755 return;
2756}
2757
2758static char * sh_userid_search(struct user_id * list, uid_t id)
2759{
2760 while (list)
2761 {
2762 if (list->id == id)
2763 return list->name;
2764 list = list->next;
2765 }
2766 return NULL;
2767}
2768
2769static char * sh_userid_get (uid_t id, int which, char * out, size_t len)
2770{
2771 char * user = NULL;
2772
2773 SH_MUTEX_LOCK_UNSAFE(mutex_cache);
2774 if (which == CACHE_UID)
2775 user = sh_userid_search(uid_list, id);
2776 else
2777 user = sh_userid_search(gid_list, id);
2778 if (user)
2779 {
2780 sl_strlcpy(out, user, len);
2781 user = out;
2782 }
2783 SH_MUTEX_UNLOCK_UNSAFE(mutex_cache);
2784
2785 return user;
2786}
2787
2788/* --------- end caching code --------- */
2789
2790char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len)
2791{
2792 struct passwd * tempres;
2793#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2794 struct passwd pwd;
2795 char * buffer;
2796#endif
2797 int status = 0;
2798 char errbuf[SH_ERRBUF_SIZE];
2799 char * tmp;
2800
2801 SL_ENTER(_("sh_unix_getUIDname"));
2802
2803 tmp = sh_userid_get(uid, CACHE_UID, out, len);
2804
2805 if (tmp)
2806 {
2807 if (tmp[0] != '\0')
2808 {
2809 SL_RETURN( out, _("sh_unix_getUIDname"));
2810 }
2811 else
2812 {
2813 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2814 }
2815 }
2816
2817#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
2818 buffer = SH_ALLOC(SH_PWBUF_SIZE);
2819 sh_getpwuid_r(uid, &pwd, buffer, SH_PWBUF_SIZE, &tempres);
2820#else
2821 errno = 0;
2822 tempres = sh_getpwuid(uid);
2823 status = errno;
2824#endif
2825
2826 if (tempres == NULL)
2827 {
2828 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2829 sh_error_message(status, errbuf, sizeof(errbuf)),
2830 _("getpwuid"), (long) uid, _("completely missing"));
2831#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2832 SH_FREE(buffer);
2833#endif
2834 sh_userid_add(uid, NULL, CACHE_UID);
2835 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2836 }
2837
2838
2839 if (tempres->pw_name != NULL)
2840 {
2841
2842 sl_strlcpy(out, tempres->pw_name, len);
2843 sh_userid_add(uid, out, CACHE_UID);
2844
2845#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2846 SH_FREE(buffer);
2847#endif
2848
2849 SL_RETURN( out, _("sh_unix_getUIDname"));
2850 }
2851 else
2852 {
2853 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2854 sh_error_message(status, errbuf, sizeof(errbuf)),
2855 _("getpwuid"), (long) uid, _("pw_user"));
2856#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2857 SH_FREE(buffer);
2858#endif
2859 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2860 }
2861 /* notreached */
2862}
2863
2864char * sh_unix_getGIDname (int level, gid_t gid, char * out, size_t len)
2865{
2866 struct group * tempres;
2867 int status = 0;
2868
2869#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2870 struct group grp;
2871 char * buffer;
2872#endif
2873 char errbuf[SH_ERRBUF_SIZE];
2874 char * tmp;
2875
2876 SL_ENTER(_("sh_unix_getGIDname"));
2877
2878 tmp = sh_userid_get((uid_t)gid, CACHE_GID, out, len);
2879
2880 if (tmp)
2881 {
2882 if (tmp[0] != '\0')
2883 {
2884 SL_RETURN( out, _("sh_unix_getGIDname"));
2885 }
2886 else
2887 {
2888 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2889 }
2890 }
2891
2892#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2893 buffer = SH_ALLOC(SH_GRBUF_SIZE);
2894 status = sh_getgrgid_r(gid, &grp, buffer, SH_GRBUF_SIZE, &tempres);
2895#else
2896 errno = 0;
2897 tempres = sh_getgrgid(gid);
2898 status = errno;
2899#endif
2900
2901 if (status == ERANGE)
2902 {
2903 static int seen = 0;
2904
2905 if (seen == 0)
2906 {
2907 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2908 sh_error_message(status, errbuf, sizeof(errbuf)),
2909 _("getgrgid"), (long) gid, _("line too long in group entry"));
2910 ++seen;
2911 }
2912
2913#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2914 SH_FREE(buffer);
2915#endif
2916
2917 sh_userid_add(gid, NULL, CACHE_GID);
2918 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2919 }
2920
2921 if (tempres == NULL)
2922 {
2923 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2924 sh_error_message(status, errbuf, sizeof(errbuf)),
2925 _("getgrgid"), (long) gid, _("completely missing"));
2926
2927#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2928 SH_FREE(buffer);
2929#endif
2930
2931 sh_userid_add(gid, NULL, CACHE_GID);
2932 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2933 }
2934
2935 if (tempres->gr_name != NULL)
2936 {
2937
2938 sl_strlcpy(out, tempres->gr_name, len);
2939 sh_userid_add((uid_t)gid, out, CACHE_GID);
2940
2941#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2942 SH_FREE(buffer);
2943#endif
2944
2945 SL_RETURN( out, _("sh_unix_getGIDname"));
2946 }
2947 else
2948 {
2949 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2950 sh_error_message(status, errbuf, sizeof(errbuf)),
2951 _("getgrgid"), (long) gid, _("gr_name"));
2952
2953#if defined(HAVE_PTHREAD) && defined (_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
2954 SH_FREE(buffer);
2955#endif
2956
2957 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2958 }
2959 /* notreached */
2960}
2961
2962int sh_unix_getUser ()
2963{
2964 char * p;
2965 uid_t seuid, sruid;
2966 char user[USER_MAX];
2967 char dir[SH_PATHBUF];
2968
2969 SL_ENTER(_("sh_unix_getUser"));
2970
2971 seuid = geteuid();
2972
2973 sh.effective.uid = seuid;
2974
2975 p = sh_unix_getUIDdir (SH_ERR_ERR, seuid, dir, sizeof(dir));
2976
2977 if (p == NULL)
2978 SL_RETURN((-1), _("sh_unix_getUser"));
2979 else
2980 {
2981 if (sl_strlen(p) >= SH_PATHBUF) {
2982 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2983 _("getpwuid"), (long) seuid, _("pw_home"));
2984 SL_RETURN((-1), _("sh_unix_getUser"));
2985 } else {
2986 sl_strlcpy ( sh.effective.home, p, SH_PATHBUF);
2987 }
2988 }
2989
2990 sruid = getuid();
2991
2992 sh.real.uid = sruid;
2993
2994 p = sh_unix_getUIDname (SH_ERR_ERR, sruid, user, sizeof(user));
2995 if (p == NULL)
2996 SL_RETURN((-1), _("sh_unix_getUser"));
2997 else
2998 {
2999 if (sl_strlen(p) >= USER_MAX) {
3000 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
3001 _("getpwuid"), (long) sruid, _("pw_user"));
3002 SL_RETURN((-1), _("sh_unix_getUser"));
3003 } else {
3004 sl_strlcpy ( sh.real.user, p, USER_MAX);
3005 }
3006 }
3007
3008 p = sh_unix_getUIDdir (SH_ERR_ERR, sruid, dir, sizeof(dir));
3009
3010 if (p == NULL)
3011 SL_RETURN((-1), _("sh_unix_getUser"));
3012 else
3013 {
3014 if (sl_strlen(p) >= SH_PATHBUF) {
3015 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
3016 _("getpwuid"), (long) sruid, _("pw_home"));
3017 SL_RETURN((-1), _("sh_unix_getUser"));
3018 } else {
3019 sl_strlcpy ( sh.real.home, p, SH_PATHBUF);
3020 }
3021 }
3022
3023 SL_RETURN((0), _("sh_unix_getUser"));
3024
3025 /* notreached */
3026}
3027
3028
3029int sh_unix_getline (SL_TICKET fd, char * line, int sizeofline)
3030{
3031 register int count;
3032 register int n = 0;
3033 char c;
3034
3035 SL_ENTER(_("sh_unix_getline"));
3036
3037 if (sizeofline < 2) {
3038 line[0] = '\0';
3039 SL_RETURN((0), _("sh_unix_getline"));
3040 }
3041
3042 --sizeofline;
3043
3044 while (n < sizeofline) {
3045
3046 count = sl_read (fd, &c, 1);
3047
3048 /* end of file
3049 */
3050 if (count < 1) {
3051 line[n] = '\0';
3052 n = -1;
3053 break;
3054 }
3055
3056 if (/* c != '\0' && */ c != '\n') {
3057 line[n] = c;
3058 ++n;
3059 } else if (c == '\n') {
3060 if (n > 0) {
3061 line[n] = '\0';
3062 break;
3063 } else {
3064 line[n] = '\n'; /* get newline only if only char on line */
3065 ++n;
3066 line[n] = '\0';
3067 break;
3068 }
3069 } else {
3070 line[n] = '\0';
3071 break;
3072 }
3073
3074 }
3075
3076
3077 line[sizeofline] = '\0'; /* make sure line is terminated */
3078 SL_RETURN((n), _("sh_unix_getline"));
3079}
3080
3081
3082#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
3083
3084/**************************************************************
3085 *
3086 * --- FILE INFO ---
3087 *
3088 **************************************************************/
3089
3090#if (defined(__linux__) && (defined(HAVE_LINUX_EXT2_FS_H) || defined(HAVE_EXT2FS_EXT2_FS_H))) || defined(HAVE_STAT_FLAGS)
3091
3092#if defined(__linux__)
3093
3094/* --- Determine ext2fs file attributes. ---
3095 */
3096#include <sys/ioctl.h>
3097#if defined(HAVE_EXT2FS_EXT2_FS_H)
3098#include <ext2fs/ext2_fs.h>
3099#else
3100#include <linux/ext2_fs.h>
3101#endif
3102
3103/* __linux__ includes */
3104#endif
3105
3106static
3107int sh_unix_getinfo_attr (char * name,
3108 unsigned long * flags,
3109 char * c_attr,
3110 int fd, struct stat * buf)
3111{
3112
3113/* TAKEN FROM:
3114 *
3115 * lsattr.c - List file attributes on an ext2 file system
3116 *
3117 * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
3118 * Laboratoire MASI, Institut Blaise Pascal
3119 * Universite Pierre et Marie Curie (Paris VI)
3120 *
3121 * This file can be redistributed under the terms of the GNU General
3122 * Public License
3123 */
3124
3125#ifdef HAVE_STAT_FLAGS
3126
3127 SL_ENTER(_("sh_unix_getinfo_attr"));
3128
3129 *flags = 0;
3130
3131 /* cast to void to avoid compiler warning about unused parameters */
3132 (void) fd;
3133 (void) name;
3134
3135#ifdef UF_NODUMP
3136 if (buf->st_flags & UF_NODUMP) {
3137 *flags |= UF_NODUMP;
3138 c_attr[0] = 'd';
3139 }
3140#endif
3141#ifdef UF_IMMUTABLE
3142 if (buf->st_flags & UF_IMMUTABLE) {
3143 *flags |= UF_IMMUTABLE;
3144 c_attr[1] = 'i';
3145 }
3146#endif
3147#ifdef UF_APPEND
3148 if (buf->st_flags & UF_APPEND) {
3149 *flags |= UF_APPEND;
3150 c_attr[2] = 'a';
3151 }
3152#endif
3153#ifdef UF_NOUNLINK
3154 if (buf->st_flags & UF_NOUNLINK) {
3155 *flags |= UF_NOUNLINK;
3156 c_attr[3] = 'u';
3157 }
3158#endif
3159#ifdef UF_OPAQUE
3160 if (buf->st_flags & UF_OPAQUE) {
3161 *flags |= UF_OPAQUE;
3162 c_attr[4] = 'o';
3163 }
3164#endif
3165#ifdef SF_ARCHIVED
3166 if (buf->st_flags & SF_ARCHIVED) {
3167 *flags |= SF_ARCHIVED;
3168 c_attr[5] = 'R';
3169 }
3170
3171#endif
3172#ifdef SF_IMMUTABLE
3173 if (buf->st_flags & SF_IMMUTABLE) {
3174 *flags |= SF_IMMUTABLE;
3175 c_attr[6] = 'I';
3176 }
3177#endif
3178#ifdef SF_APPEND
3179 if (buf->st_flags & SF_APPEND) {
3180 *flags |= SF_APPEND;
3181 c_attr[7] = 'A';
3182 }
3183#endif
3184#ifdef SF_NOUNLINK
3185 if (buf->st_flags & SF_NOUNLINK) {
3186 *flags |= SF_NOUNLINK;
3187 c_attr[8] = 'U';
3188 }
3189#endif
3190
3191 /* ! HAVE_STAT_FLAGS */
3192#else
3193
3194#ifdef HAVE_EXT2_IOCTLS
3195 int /* fd, */ r, f;
3196
3197 SL_ENTER(_("sh_unix_getinfo_attr"));
3198
3199 *flags = 0;
3200 (void) buf;
3201
3202 /* open() -> aud_open() R.Wichmann
3203 fd = aud_open (FIL__, __LINE__, SL_YESPRIV, name, O_RDONLY|O_NONBLOCK, 0);
3204 */
3205
3206 if (fd == -1 || name == NULL)
3207 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
3208
3209
3210 r = ioctl (fd, EXT2_IOC_GETFLAGS, &f);
3211 /* sl_close_fd (FIL__, __LINE__, fd); */
3212
3213 if (r == -1)
3214 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
3215
3216 if (f == 0)
3217 SL_RETURN(0, _("sh_unix_getinfo_attr"));
3218
3219 *flags = f;
3220
3221/* ! HAVE_EXT2_IOCTLS */
3222#else
3223
3224 SL_ENTER(_("sh_unix_getinfo_attr"));
3225
3226 *flags = 0; /* modified by R.Wichmann */
3227
3228/* ! HAVE_EXT2_IOCTLS */
3229#endif
3230/*
3231 * END
3232 *
3233 * lsattr.c - List file attributes on an ext2 file system
3234 */
3235
3236 if (*flags == 0)
3237 goto theend;
3238
3239#ifdef EXT2_SECRM_FL
3240 if ( (*flags & EXT2_SECRM_FL) != 0 ) c_attr[0] = 's';
3241#endif
3242#ifdef EXT2_UNRM_FL
3243 if ( (*flags & EXT2_UNRM_FL) != 0 ) c_attr[1] = 'u';
3244#endif
3245#ifdef EXT2_SYNC_FL
3246 if ( (*flags & EXT2_SYNC_FL) != 0 ) c_attr[2] = 'S';
3247#endif
3248#ifdef EXT2_IMMUTABLE_FL
3249 if ( (*flags & EXT2_IMMUTABLE_FL) != 0) c_attr[3] = 'i';
3250#endif
3251#ifdef EXT2_APPEND_FL
3252 if ( (*flags & EXT2_APPEND_FL) != 0 ) c_attr[4] = 'a';
3253#endif
3254#ifdef EXT2_NODUMP_FL
3255 if ( (*flags & EXT2_NODUMP_FL) != 0 ) c_attr[5] = 'd';
3256#endif
3257#ifdef EXT2_NOATIME_FL
3258 if ( (*flags & EXT2_NOATIME_FL) != 0) c_attr[6] = 'A';
3259#endif
3260#ifdef EXT2_COMPR_FL
3261 if ( (*flags & EXT2_COMPR_FL) != 0 ) c_attr[7] = 'c';
3262#endif
3263
3264#ifdef EXT2_TOPDIR_FL
3265 if ( (*flags & EXT2_TOPDIR_FL) != 0 ) c_attr[8] = 'T';
3266#endif
3267#ifdef EXT2_DIRSYNC_FL
3268 if ( (*flags & EXT2_DIRSYNC_FL) != 0 ) c_attr[9] = 'D';
3269#endif
3270#ifdef EXT2_NOTAIL_FL
3271 if ( (*flags & EXT2_NOTAIL_FL) != 0 ) c_attr[10] = 't';
3272#endif
3273#ifdef EXT2_JOURNAL_DATA_FL
3274 if ( (*flags & EXT2_JOURNAL_DATA_FL) != 0) c_attr[11] = 'j';
3275#endif
3276
3277 theend:
3278 /* ext2 */
3279#endif
3280
3281 c_attr[12] = '\0';
3282
3283 SL_RETURN(0, _("sh_unix_getinfo_attr"));
3284}
3285
3286/* defined(__linux__) || defined(HAVE_STAT_FLAGS) */
3287#endif
3288
3289/* determine file type
3290 */
3291static
3292int sh_unix_getinfo_type (struct stat * buf,
3293 ShFileType * type,
3294 char * c_mode)
3295{
3296 SL_ENTER(_("sh_unix_getinfo_type"));
3297
3298 if ( S_ISREG(buf->st_mode) ) {
3299 (*type) = SH_FILE_REGULAR;
3300 c_mode[0] = '-';
3301 }
3302 else if ( S_ISLNK(buf->st_mode) ) {
3303 (*type) = SH_FILE_SYMLINK;
3304 c_mode[0] = 'l';
3305 }
3306 else if ( S_ISDIR(buf->st_mode) ) {
3307 (*type) = SH_FILE_DIRECTORY;
3308 c_mode[0] = 'd';
3309 }
3310 else if ( S_ISCHR(buf->st_mode) ) {
3311 (*type) = SH_FILE_CDEV;
3312 c_mode[0] = 'c';
3313 }
3314 else if ( S_ISBLK(buf->st_mode) ) {
3315 (*type) = SH_FILE_BDEV;
3316 c_mode[0] = 'b';
3317 }
3318 else if ( S_ISFIFO(buf->st_mode) ) {
3319 (*type) = SH_FILE_FIFO;
3320 c_mode[0] = '|';
3321 }
3322 else if ( S_ISSOCK(buf->st_mode) ) {
3323 (*type) = SH_FILE_SOCKET;
3324 c_mode[0] = 's';
3325 }
3326 else if ( S_ISDOOR(buf->st_mode) ) {
3327 (*type) = SH_FILE_DOOR;
3328 c_mode[0] = 'D';
3329 }
3330 else if ( S_ISPORT(buf->st_mode) ) {
3331 (*type) = SH_FILE_PORT;
3332 c_mode[0] = 'P';
3333 }
3334 else {
3335 (*type) = SH_FILE_UNKNOWN;
3336 c_mode[0] = '?';
3337 }
3338
3339 SL_RETURN(0, _("sh_unix_getinfo_type"));
3340}
3341
3342int sh_unix_get_ftype(char * fullpath)
3343{
3344 char c_mode[CMODE_SIZE];
3345 struct stat buf;
3346 ShFileType type;
3347 int res;
3348
3349 SL_ENTER(_("sh_unix_get_ftype"));
3350
3351 res = retry_lstat(FIL__, __LINE__, fullpath, &buf);
3352
3353 if (res < 0)
3354 SL_RETURN(SH_FILE_UNKNOWN, _("sh_unix_getinfo_type"));
3355
3356 sh_unix_getinfo_type (&buf, &type, c_mode);
3357
3358 SL_RETURN(type, _("sh_unix_get_ftype"));
3359}
3360
3361
3362static
3363int sh_unix_getinfo_mode (struct stat *buf,
3364 unsigned int * mode,
3365 char * c_mode)
3366{
3367
3368 SL_ENTER(_("sh_unix_getinfo_mode"));
3369
3370 (*mode) = buf->st_mode;
3371
3372 /* make 'ls'-like string */
3373
3374 if ( (buf->st_mode & S_IRUSR) != 0 ) c_mode[1] = 'r';
3375 if ( (buf->st_mode & S_IWUSR) != 0 ) c_mode[2] = 'w';
3376 if ( (buf->st_mode & S_IXUSR) != 0 ) {
3377 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 's';
3378 else c_mode[3] = 'x';
3379 } else {
3380 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 'S';
3381 }
3382
3383 if ( (buf->st_mode & S_IRGRP) != 0 ) c_mode[4] = 'r';
3384 if ( (buf->st_mode & S_IWGRP) != 0 ) c_mode[5] = 'w';
3385 if ( (buf->st_mode & S_IXGRP) != 0 ) {
3386 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 's';
3387 else c_mode[6] = 'x';
3388 } else {
3389 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 'S';
3390 }
3391
3392 if ( (buf->st_mode & S_IROTH) != 0 ) c_mode[7] = 'r';
3393 if ( (buf->st_mode & S_IWOTH) != 0 ) c_mode[8] = 'w';
3394#ifdef S_ISVTX /* not POSIX */
3395 if ( (buf->st_mode & S_IXOTH) != 0 ) {
3396 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 't';
3397 else c_mode[9] = 'x';
3398 } else {
3399 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 'T';
3400 }
3401#else
3402 if ( (buf->st_mode & S_IXOTH) != 0 ) c_mode[9] = 'x';
3403#endif
3404
3405 SL_RETURN(0, _("sh_unix_getinfo_mode"));
3406}
3407
3408
3409long IO_Limit = 0;
3410
3411void sh_unix_io_pause ()
3412{
3413 long runtime;
3414 float someval;
3415 unsigned long sometime;
3416
3417 if (IO_Limit == 0)
3418 {
3419 return;
3420 }
3421 else
3422 {
3423 runtime = (long) (time(NULL) - sh.statistics.time_start);
3424
3425 if (runtime > 0 && (long)(sh.statistics.bytes_hashed/runtime) > IO_Limit)
3426 {
3427 someval = sh.statistics.bytes_hashed - (IO_Limit * runtime);
3428 someval /= (float) IO_Limit;
3429 if (someval < 1.0)
3430 {
3431 someval *= 1000; /* milliseconds in a second */
3432 sometime = (unsigned long) someval;
3433 retry_msleep(0, sometime);
3434 }
3435 else
3436 {
3437 sometime = (unsigned long) someval;
3438 retry_msleep (sometime, 0);
3439 }
3440 }
3441 }
3442 return;
3443}
3444
3445int sh_unix_set_io_limit (const char * c)
3446{
3447 long val;
3448
3449 SL_ENTER(_("sh_unix_set_io_limit"));
3450
3451 val = strtol (c, (char **)NULL, 10);
3452 if (val < 0)
3453 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
3454 _("set I/O limit"), c);
3455
3456 val = (val < 0 ? 0 : val);
3457
3458 IO_Limit = val * 1024;
3459 SL_RETURN( 0, _("sh_unix_set_io_limit"));
3460}
3461
3462/* obtain file info
3463 */
3464extern int flag_err_debug;
3465
3466#include "sh_ignore.h"
3467
3468int sh_unix_checksum_size (char * filename, off_t size, int is_max_size,
3469 char * fileHash, int alert_timeout, SL_TICKET fd)
3470{
3471 file_type * tmpFile;
3472 int status;
3473
3474 SL_ENTER(_("sh_unix_checksum_size"));
3475
3476 tmpFile = SH_ALLOC(sizeof(file_type));
3477 tmpFile->link_path = NULL;
3478
3479 if (sh.flag.checkSum != SH_CHECK_INIT)
3480 {
3481 /* lookup file in database */
3482 if (is_max_size == S_TRUE) {
3483 status = sh_hash_get_it (filename, tmpFile, NULL);
3484 if ((status != 0) || (tmpFile->size > size)) {
3485 goto out;
3486 }
3487 } else {
3488 tmpFile->size = size;
3489 }
3490 }
3491 else
3492 {
3493 tmpFile->size = size;
3494 }
3495
3496 /* if last <= current get checksum */
3497 if (tmpFile->size <= size)
3498 {
3499 char hashbuf[KEYBUF_SIZE];
3500 UINT64 local_length = (UINT64) (tmpFile->size < 0 ? 0 : tmpFile->size);
3501 sl_strlcpy(fileHash,
3502 sh_tiger_generic_hash (filename, fd, &(local_length),
3503 alert_timeout, hashbuf, sizeof(hashbuf)),
3504 KEY_LEN+1);
3505
3506 /* return */
3507 if (tmpFile->link_path) SH_FREE(tmpFile->link_path);
3508 SH_FREE(tmpFile);
3509 SL_RETURN( 0, _("sh_unix_checksum_size"));
3510 }
3511
3512 out:
3513 if (tmpFile->link_path) SH_FREE(tmpFile->link_path);
3514 SH_FREE(tmpFile);
3515 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3516 SL_RETURN( -1, _("sh_unix_checksum_size"));
3517}
3518
3519/********************************************************
3520 * Search rotated logfile
3521 */
3522extern char * sh_rotated_log_search(const char * path, struct stat * buf);
3523
3524int sh_check_rotated_log (const char * path,
3525 UINT64 old_size, UINT64 old_inode, const char * old_hash)
3526{
3527 struct stat obuf;
3528 UINT64 length_nolim = TIGER_NOLIM;
3529 int retval = S_FALSE;
3530
3531 if (old_size != length_nolim)
3532 {
3533 char hashbuf[KEYBUF_SIZE];
3534 char * rotated_file;
3535
3536 obuf.st_ino = old_inode;
3537 rotated_file = sh_rotated_log_search(path, &obuf);
3538
3539 if (rotated_file && (0 != strcmp(path, rotated_file)))
3540 {
3541 SL_TICKET fd = sl_open_fastread (FIL__, __LINE__, rotated_file, SL_YESPRIV);
3542 if (!SL_ISERROR(fd))
3543 {
3544 sh_unix_checksum_size (rotated_file, old_size, S_FALSE, hashbuf, 120 /* alert_timeout */, fd);
3545
3546 sl_close(fd);
3547
3548 if (strncmp (old_hash, hashbuf, KEY_LEN) == 0) {
3549 retval = S_TRUE;
3550 }
3551 }
3552 SH_FREE(rotated_file);
3553 }
3554 }
3555 return retval;
3556}
3557
3558
3559int sh_unix_check_selinux = S_FALSE;
3560int sh_unix_check_acl = S_FALSE;
3561
3562#ifdef USE_ACL
3563
3564#include <sys/acl.h>
3565static char * sh_unix_getinfo_acl (char * path, int fd, struct stat * buf)
3566{
3567 /* system.posix_acl_access, system.posix_acl_default
3568 */
3569 char * out = NULL;
3570 char * collect = NULL;
3571 char * tmp;
3572 char * out_compact;
3573 ssize_t len;
3574 acl_t result;
3575
3576 SL_ENTER(_("sh_unix_getinfo_acl"));
3577
3578 result = (fd == -1) ?
3579 acl_get_file (path, ACL_TYPE_ACCESS) :
3580 acl_get_fd (fd);
3581
3582 if (result)
3583 {
3584 out = acl_to_text (result, &len);
3585 if (out && (len > 0)) {
3586 out_compact = sh_util_acl_compact (out, len);
3587 acl_free(out);
3588 if (out_compact)
3589 {
3590 collect = sh_util_strconcat (_("acl_access:"), out_compact, NULL);
3591 SH_FREE(out_compact);
3592 }
3593 }
3594 acl_free(result);
3595 }
3596
3597
3598 if ( S_ISDIR(buf->st_mode) )
3599 {
3600 result = acl_get_file (path, ACL_TYPE_DEFAULT);
3601
3602 if (result)
3603 {
3604 out = acl_to_text (result, &len);
3605 if (out && (len > 0)) {
3606 out_compact = sh_util_acl_compact (out, len);
3607 acl_free(out);
3608 if (out_compact) {
3609 if (collect) {
3610 tmp = sh_util_strconcat (_("acl_default:"),
3611 out_compact, ":", collect, NULL);
3612 SH_FREE(collect);
3613 }
3614 else {
3615 tmp = sh_util_strconcat (_("acl_default:"), out_compact, NULL);
3616 }
3617 SH_FREE(out_compact);
3618 collect = tmp;
3619 }
3620 }
3621 acl_free(result);
3622 }
3623 }
3624
3625 SL_RETURN((collect),_("sh_unix_getinfo_acl"));
3626}
3627#endif
3628
3629#ifdef USE_XATTR
3630
3631#include <attr/xattr.h>
3632static char * sh_unix_getinfo_xattr_int (char * path, int fd, char * name)
3633{
3634 char * out = NULL;
3635 char * tmp = NULL;
3636 size_t size = 256;
3637 ssize_t result;
3638
3639 SL_ENTER(_("sh_unix_getinfo_xattr_int"));
3640
3641 out = SH_ALLOC(size);
3642
3643 result = (fd == -1) ?
3644 lgetxattr (path, name, out, size-1) :
3645 fgetxattr (fd, name, out, size-1);
3646
3647 if (result == -1 && errno == ERANGE)
3648 {
3649 SH_FREE(out);
3650 result = (fd == -1) ?
3651 lgetxattr (path, name, NULL, 0) :
3652 fgetxattr (fd, name, NULL, 0);
3653 size = result + 1;
3654 out = SH_ALLOC(size);
3655 result = (fd == -1) ?
3656 lgetxattr (path, name, out, size-1) :
3657 fgetxattr (fd, name, out, size-1);
3658 }
3659
3660 if ((result > 0) && ((size_t)result < size))
3661 {
3662 out[size-1] = '\0';
3663 tmp = out;
3664 }
3665 else
3666 {
3667 SH_FREE(out);
3668 }
3669
3670 SL_RETURN((tmp),_("sh_unix_getinfo_xattr_int"));
3671}
3672
3673
3674static char * sh_unix_getinfo_xattr (char * path, int fd, struct stat * buf)
3675{
3676 /* system.posix_acl_access, system.posix_acl_default, security.selinux
3677 */
3678 char * tmp;
3679 char * out = NULL;
3680 char * collect = NULL;
3681
3682 SL_ENTER(_("sh_unix_getinfo_xattr"));
3683
3684#ifdef USE_ACL
3685 /*
3686 * we need the acl_get_fd/acl_get_file functions, getxattr will only
3687 * yield the raw bytes
3688 */
3689 if (sh_unix_check_acl == S_TRUE)
3690 {
3691 out = sh_unix_getinfo_acl(path, fd, buf);
3692
3693 if (out)
3694 {
3695 collect = out;
3696 }
3697 }
3698#else
3699 (void) buf;
3700#endif
3701
3702 if (sh_unix_check_selinux == S_TRUE)
3703 {
3704 out = sh_unix_getinfo_xattr_int(path, fd, _("security.selinux"));
3705
3706 if (out)
3707 {
3708 if (collect) {
3709 tmp = sh_util_strconcat(_("selinux:"), out, ":", collect, NULL);
3710 SH_FREE(collect);
3711 }
3712 else {
3713 tmp = sh_util_strconcat(_("selinux:"), out, NULL);
3714 }
3715 SH_FREE(out);
3716 collect = tmp;
3717 }
3718 }
3719
3720 SL_RETURN((collect),_("sh_unix_getinfo_xattr"));
3721}
3722#endif
3723
3724#ifdef USE_XATTR
3725int sh_unix_setcheckselinux (const char * c)
3726{
3727 int i;
3728 SL_ENTER(_("sh_unix_setcheckselinux"));
3729 i = sh_util_flagval(c, &(sh_unix_check_selinux));
3730
3731 SL_RETURN(i, _("sh_unix_setcheckselinux"));
3732}
3733#endif
3734
3735#ifdef USE_ACL
3736int sh_unix_setcheckacl (const char * c)
3737{
3738 int i;
3739 SL_ENTER(_("sh_unix_setcheckacl"));
3740 i = sh_util_flagval(c, &(sh_unix_check_acl));
3741
3742 SL_RETURN(i, _("sh_unix_setcheckacl"));
3743}
3744#endif
3745
3746#ifdef HAVE_LIBZ
3747#include <zlib.h>
3748#endif
3749
3750
3751static void * sh_dummy_filename;
3752static void * sh_dummy_tmp;
3753static void * sh_dummy_tmp2;
3754
3755int sh_unix_getinfo (int level, const char * filename, file_type * theFile,
3756 char * fileHash, int policy)
3757{
3758 char timestr[81];
3759 long runtim;
3760 struct stat buf;
3761 struct stat lbuf;
3762 struct stat fbuf;
3763 volatile int stat_return;
3764 volatile int stat_errno = 0;
3765
3766 ShFileType type;
3767 unsigned int mode;
3768 char * tmp;
3769 char * tmp2;
3770
3771 char * linknamebuf;
3772 volatile int linksize;
3773
3774 extern int get_the_fd (SL_TICKET ticket);
3775
3776 volatile SL_TICKET rval_open;
3777 volatile int err_open = 0;
3778
3779 volatile int fd;
3780 volatile int fstat_return;
3781 volatile int fstat_errno = 0;
3782 volatile int try = 0;
3783
3784 sh_string * content = NULL;
3785
3786 time_t tend;
3787 time_t tstart;
3788
3789
3790 char * path = NULL;
3791
3792 volatile int alert_timeout = 120;
3793
3794 path = theFile->fullpath;
3795
3796 SL_ENTER(_("sh_unix_getinfo"));
3797
3798 if (!MODI_INITIALIZED(theFile->check_mask))
3799 {
3800 tmp2 = sh_util_safe_name (theFile->fullpath);
3801 SH_MUTEX_LOCK(mutex_thread_nolog);
3802 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_SUBGPATH,
3803 _("Uninitialized check mask"), _("sh_unix_getinfo"),
3804 tmp2);
3805 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3806 SH_FREE(tmp2);
3807 }
3808
3809 /* Take the address to keep gcc from putting it into a register.
3810 * Avoids the 'clobbered by longjmp' warning.
3811 */
3812 sh_dummy_filename = (void *) &filename;
3813 sh_dummy_tmp = (void *) &tmp;
3814 sh_dummy_tmp2 = (void *) &tmp2;
3815
3816 /* --- Stat the file, and get checksum. ---
3817 */
3818 tstart = time(NULL);
3819
3820 stat_return = retry_lstat (FIL__, __LINE__,
3821 path /* theFile->fullpath */, &buf);
3822
3823 if (stat_return)
3824 stat_errno = errno;
3825
3826 theFile->link_path = NULL;
3827
3828 try_again:
3829
3830 fd = -1;
3831 fstat_return = -1;
3832 rval_open = -1;
3833
3834 if (stat_return == 0 && S_ISREG(buf.st_mode))
3835 {
3836 rval_open = sl_open_fastread (FIL__, __LINE__,
3837 path /* theFile->fullpath */, SL_YESPRIV);
3838 if (SL_ISERROR(rval_open))
3839 {
3840 char * stale = sl_check_stale();
3841
3842 if (stale)
3843 {
3844 SH_MUTEX_LOCK(mutex_thread_nolog);
3845 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, err_open, MSG_E_SUBGEN,
3846 stale, _("sh_unix_getinfo_open"));
3847 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3848 }
3849
3850 if (errno == EBADF && try == 0) /* obsolete, but we keep this, just in case */
3851 {
3852 ++try;
3853 goto try_again;
3854 }
3855 err_open = errno;
3856 }
3857
3858 alert_timeout = 120; /* this is per 8K block now ! */
3859
3860 if (path[1] == 'p' && path[5] == '/' && path[2] == 'r' &&
3861 path[3] == 'o' && path[4] == 'c' && path[0] == '/')
3862 {
3863 /* seven is magic */
3864 alert_timeout = 7;
3865 }
3866
3867 fd = get_the_fd(rval_open);
3868 }
3869
3870 tend = time(NULL);
3871
3872 /* An unprivileged user may slow lstat/open to a crawl
3873 * with clever path/symlink setup
3874 */
3875 if ((tend - tstart) > (time_t) /* 60 */ 6)
3876 {
3877 tmp2 = sh_util_safe_name (theFile->fullpath);
3878 SH_MUTEX_LOCK(mutex_thread_nolog);
3879 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_TOOLATE,
3880 (long)(tend - tstart), tmp2);
3881 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3882 SH_FREE(tmp2);
3883 }
3884
3885 if (fd >= 0)
3886 {
3887 fstat_return = retry_fstat (FIL__, __LINE__, fd, &fbuf);
3888
3889 if (fstat_return)
3890 {
3891 char * stale;
3892
3893 fstat_errno = errno;
3894
3895 stale = sl_check_stale();
3896
3897 if (stale)
3898 {
3899 SH_MUTEX_LOCK(mutex_thread_nolog);
3900 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, fstat_errno,
3901 MSG_E_SUBGEN,
3902 stale, _("sh_unix_getinfo_fstat"));
3903 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3904 }
3905
3906 if (try == 0) /* obsolete, but we keep this, just in case */
3907 {
3908 ++try;
3909 sl_close(rval_open);
3910 goto try_again;
3911 }
3912 }
3913 }
3914 else
3915 {
3916 fd = -1;
3917 }
3918
3919
3920 /* --- case 1: lstat failed ---
3921 */
3922 if (stat_return != 0)
3923 {
3924 stat_return = errno;
3925 if (!SL_ISERROR(rval_open))
3926 sl_close(rval_open);
3927 if (sh.flag.checkSum == SH_CHECK_INIT ||
3928 (sh_hash_have_it (theFile->fullpath) >= 0 &&
3929 (!SH_FFLAG_REPORTED_SET(theFile->file_reported))))
3930 {
3931 if (S_FALSE == sh_ignore_chk_del(theFile->fullpath)) {
3932 char errbuf[SH_ERRBUF_SIZE];
3933 uid_t euid;
3934 (void) sl_get_euid(&euid);
3935 tmp2 = sh_util_safe_name (theFile->fullpath);
3936 SH_MUTEX_LOCK(mutex_thread_nolog);
3937 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
3938 _("lstat"),
3939 sh_error_message (stat_errno, errbuf, sizeof(errbuf)),
3940 (long) euid,
3941 tmp2);
3942 SH_MUTEX_UNLOCK(mutex_thread_nolog);
3943 SH_FREE(tmp2);
3944 }
3945 }
3946 SL_RETURN((-1),_("sh_unix_getinfo"));
3947 }
3948
3949 /* --- case 2: not a regular file ---
3950 */
3951 else if (! S_ISREG(buf.st_mode))
3952 {
3953 if (fileHash != NULL)
3954 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3955 }
3956
3957 /* --- case 3a: a regular file, fstat ok ---
3958 */
3959 else if (fstat_return == 0 &&
3960 buf.st_mode == fbuf.st_mode &&
3961 buf.st_ino == fbuf.st_ino &&
3962 buf.st_uid == fbuf.st_uid &&
3963 buf.st_gid == fbuf.st_gid &&
3964 buf.st_dev == fbuf.st_dev )
3965 {
3966 if (fileHash != NULL)
3967 {
3968 if ((theFile->check_mask & MODI_CHK) == 0 ||
3969 sh_restrict_this(theFile->fullpath, (UINT64) fbuf.st_size,
3970 (UINT64) fbuf.st_mode, rval_open))
3971 {
3972 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3973 }
3974 else if ((theFile->check_mask & MODI_PREL) != 0 &&
3975 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
3976 alert_timeout, theFile->fullpath))
3977 {
3978 if (0 != sh_prelink_run (theFile->fullpath,
3979 fileHash, alert_timeout))
3980 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
3981 }
3982 else
3983 {
3984 char hashbuf[KEYBUF_SIZE];
3985 UINT64 length_current = TIGER_NOLIM;
3986
3987 if (MODI_TXT_ENABLED(theFile->check_mask) && fbuf.st_size < (10 * SH_TXT_MAX))
3988 {
3989 sl_init_content (rval_open, fbuf.st_size);
3990 }
3991
3992 sl_strlcpy(fileHash,
3993 sh_tiger_generic_hash (theFile->fullpath,
3994 rval_open, &length_current,
3995 alert_timeout,
3996 hashbuf, sizeof(hashbuf)),
3997 KEY_LEN+1);
3998
3999 content = sl_get_content(rval_open);
4000 content = sh_string_copy(content);
4001
4002 if ((theFile->check_mask & MODI_SGROW) != 0)
4003 {
4004 /* Update size so it matches the one for which the checksum
4005 has been computed */
4006 fbuf.st_size = length_current;
4007 buf.st_size = fbuf.st_size;
4008 sl_rewind(rval_open);
4009 sh_unix_checksum_size (theFile->fullpath, length_current, S_TRUE,
4010 &fileHash[KEY_LEN + 1],
4011 alert_timeout, rval_open);
4012 }
4013 }
4014 }
4015 }
4016
4017 /* --- case 3b: a regular file, fstat ok, but different ---
4018 */
4019 else if (fstat_return == 0 && S_ISREG(fbuf.st_mode))
4020 {
4021 memcpy (&buf, &fbuf, sizeof( struct stat ));
4022
4023 if (fileHash != NULL)
4024 {
4025 if ((theFile->check_mask & MODI_CHK) == 0 ||
4026 sh_restrict_this(theFile->fullpath, (UINT64) fbuf.st_size,
4027 (UINT64) fbuf.st_mode, rval_open))
4028 {
4029 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4030 }
4031 else if (policy == SH_LEVEL_PRELINK &&
4032 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
4033 alert_timeout, theFile->fullpath))
4034 {
4035 if (0 != sh_prelink_run (theFile->fullpath,
4036 fileHash, alert_timeout))
4037 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4038 }
4039 else
4040 {
4041 char hashbuf[KEYBUF_SIZE];
4042 UINT64 length_current = TIGER_NOLIM;
4043
4044 if (MODI_TXT_ENABLED(theFile->check_mask) && fbuf.st_size < (10 * SH_TXT_MAX))
4045 {
4046 sl_init_content (rval_open, fbuf.st_size);
4047 }
4048
4049 sl_strlcpy(fileHash,
4050 sh_tiger_generic_hash (theFile->fullpath, rval_open,
4051 &length_current,
4052 alert_timeout,
4053 hashbuf, sizeof(hashbuf)),
4054 KEY_LEN + 1);
4055
4056 content = sl_get_content(rval_open);
4057 content = sh_string_copy(content);
4058
4059 if ((theFile->check_mask & MODI_SGROW) != 0)
4060 {
4061 /* Update size so it matches the one for which the checksum
4062 has been computed */
4063 fbuf.st_size = length_current;
4064 buf.st_size = fbuf.st_size;
4065 sl_rewind(rval_open);
4066 sh_unix_checksum_size (theFile->fullpath, length_current, S_TRUE,
4067 &fileHash[KEY_LEN + 1],
4068 alert_timeout, rval_open);
4069 }
4070 }
4071 }
4072 }
4073
4074 /* --- case 4: a regular file, fstat failed ---
4075 */
4076
4077 else /* fstat_return != 0 or !S_ISREG(fbuf.st_mode) or open() failed */
4078 {
4079 uid_t euid;
4080
4081 if (fileHash != NULL)
4082 sl_strlcpy(fileHash, SH_KEY_NULL, KEY_LEN+1);
4083
4084 if ((theFile->check_mask & MODI_CHK) != 0)
4085 {
4086 tmp2 = sh_util_safe_name (theFile->fullpath);
4087
4088
4089 if (fd >= 0 && fstat_return != 0)
4090 {
4091 char errbuf[SH_ERRBUF_SIZE];
4092 (void) sl_get_euid(&euid);
4093
4094 SH_MUTEX_LOCK(mutex_thread_nolog);
4095 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_STAT,
4096 _("fstat"),
4097 sh_error_message (fstat_errno, errbuf, sizeof(errbuf)),
4098 (long) euid,
4099 tmp2);
4100 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4101 }
4102 else if (fd >= 0 && !S_ISREG(fbuf.st_mode))
4103 {
4104 SH_MUTEX_LOCK(mutex_thread_nolog);
4105 sh_error_handle (level, FIL__, __LINE__, fstat_errno,
4106 MSG_E_NOTREG, tmp2);
4107 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4108 }
4109 else
4110 {
4111 char errbuf[SH_ERRBUF_SIZE];
4112 char errbuf2[SH_ERRBUF_SIZE];
4113 sl_strlcpy(errbuf, sl_error_string(rval_open), sizeof(errbuf));
4114 sh_error_message(err_open, errbuf2, sizeof(errbuf2));
4115 SH_MUTEX_LOCK(mutex_thread_nolog);
4116 sh_error_handle (level, FIL__, __LINE__, err_open,
4117 MSG_E_READ, errbuf, errbuf2, tmp2);
4118 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4119 }
4120 SH_FREE(tmp2);
4121 }
4122 }
4123
4124
4125 /* --- Determine file type. ---
4126 */
4127 memset (theFile->c_mode, '-', CMODE_SIZE-1);
4128 theFile->c_mode[CMODE_SIZE-1] = '\0';
4129
4130 memset (theFile->link_c_mode, '-', CMODE_SIZE-1);
4131 theFile->link_c_mode[CMODE_SIZE-1] = '\0';
4132
4133 sh_unix_getinfo_type (&buf, &type, theFile->c_mode);
4134 theFile->type = type;
4135
4136#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
4137
4138 /* --- Determine file attributes. ---
4139 */
4140 memset (theFile->c_attributes, '-', ATTRBUF_SIZE);
4141 theFile->c_attributes[ATTRBUF_USED] = '\0';
4142 theFile->attributes = 0;
4143
4144#if (defined(__linux__) && (defined(HAVE_LINUX_EXT2_FS_H) || defined(HAVE_EXT2FS_EXT2_FS_H))) || defined(HAVE_STAT_FLAGS)
4145 if (theFile->c_mode[0] != 'c' && theFile->c_mode[0] != 'b' &&
4146 theFile->c_mode[0] != 'l' )
4147 sh_unix_getinfo_attr(theFile->fullpath,
4148 &theFile->attributes, theFile->c_attributes,
4149 fd, &buf);
4150#endif
4151#endif
4152
4153#if defined(USE_XATTR) && defined(USE_ACL)
4154 if (sh_unix_check_selinux == S_TRUE || sh_unix_check_acl == S_TRUE)
4155 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
4156#elif defined(USE_XATTR)
4157 if (sh_unix_check_selinux == S_TRUE)
4158 theFile->attr_string = sh_unix_getinfo_xattr (theFile->fullpath, fd, &buf);
4159#elif defined(USE_ACL)
4160 if (sh_unix_check_acl == S_TRUE)
4161 theFile->attr_string = sh_unix_getinfo_acl (theFile->fullpath, fd, &buf);
4162#else
4163 theFile->attr_string = NULL;
4164#endif
4165
4166 if (!SL_ISERROR(rval_open))
4167 sl_close(rval_open);
4168
4169
4170 /* --- I/O limit. ---
4171 */
4172 if (IO_Limit > 0)
4173 {
4174 runtim = (long) (time(NULL) - sh.statistics.time_start);
4175
4176 if (runtim > 0 && (long)(sh.statistics.bytes_hashed/runtim) > IO_Limit)
4177 retry_msleep(1, 0);
4178 }
4179
4180 /* --- Determine permissions. ---
4181 */
4182 sh_unix_getinfo_mode (&buf, &mode, theFile->c_mode);
4183
4184 /* --- Trivia. ---
4185 */
4186 theFile->dev = buf.st_dev;
4187 theFile->ino = buf.st_ino;
4188 theFile->mode = buf.st_mode;
4189 theFile->hardlinks = buf.st_nlink;
4190 theFile->owner = buf.st_uid;
4191 theFile->group = buf.st_gid;
4192 theFile->rdev = buf.st_rdev;
4193 theFile->size = buf.st_size;
4194 theFile->blksize = (unsigned long) buf.st_blksize;
4195 theFile->blocks = (unsigned long) buf.st_blocks;
4196 theFile->atime = buf.st_atime;
4197 theFile->mtime = buf.st_mtime;
4198 theFile->ctime = buf.st_ctime;
4199
4200
4201 /* --- Owner and group. ---
4202 */
4203
4204 if (NULL == sh_unix_getGIDname(SH_ERR_ALL, buf.st_gid, theFile->c_group, GROUP_MAX+1)) {
4205
4206 tmp2 = sh_util_safe_name (theFile->fullpath);
4207
4208 if (policy == SH_LEVEL_ALLIGNORE)
4209 {
4210 SH_MUTEX_LOCK(mutex_thread_nolog);
4211 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
4212 MSG_FI_NOGRP,
4213 (long) buf.st_gid, tmp2);
4214 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4215 }
4216 else
4217 {
4218 SH_MUTEX_LOCK(mutex_thread_nolog);
4219 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
4220 MSG_FI_NOGRP,
4221 (long) buf.st_gid, tmp2);
4222 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4223 }
4224 SH_FREE(tmp2);
4225 sl_snprintf(theFile->c_group, GROUP_MAX+1, "%d", (long) buf.st_gid);
4226 }
4227
4228
4229 if (NULL == sh_unix_getUIDname(SH_ERR_ALL, buf.st_uid, theFile->c_owner, USER_MAX+1)) {
4230
4231 tmp2 = sh_util_safe_name (theFile->fullpath);
4232
4233 if (policy == SH_LEVEL_ALLIGNORE)
4234 {
4235 SH_MUTEX_LOCK(mutex_thread_nolog);
4236 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
4237 MSG_FI_NOUSR,
4238 (long) buf.st_uid, tmp2);
4239 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4240 }
4241 else
4242 {
4243 SH_MUTEX_LOCK(mutex_thread_nolog);
4244 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
4245 MSG_FI_NOUSR,
4246 (long) buf.st_uid, tmp2);
4247 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4248 }
4249 SH_FREE(tmp2);
4250 sl_snprintf(theFile->c_owner, USER_MAX+1, "%d", (long) buf.st_uid);
4251 }
4252
4253 /* --- Output the file. ---
4254 */
4255 if (flag_err_debug == SL_TRUE)
4256 {
4257 tmp2 = sh_util_safe_name ((filename == NULL) ?
4258 theFile->fullpath : filename);
4259 (void) sh_unix_time(theFile->mtime, timestr, sizeof(timestr));
4260 SH_MUTEX_LOCK(mutex_thread_nolog);
4261 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LIST,
4262 theFile->c_mode,
4263 theFile->hardlinks,
4264 theFile->c_owner,
4265 theFile->c_group,
4266 (unsigned long) theFile->size,
4267 timestr,
4268 tmp2);
4269 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4270 SH_FREE(tmp2);
4271 }
4272
4273 /* --- Check for links. ---
4274 */
4275 if (theFile->c_mode[0] == 'l')
4276 {
4277 linknamebuf = SH_ALLOC(PATH_MAX);
4278
4279 /* flawfinder: ignore */
4280 linksize = readlink (theFile->fullpath, linknamebuf, PATH_MAX-1);
4281
4282 if (linksize < (PATH_MAX-1) && linksize >= 0)
4283 linknamebuf[linksize] = '\0';
4284 else
4285 linknamebuf[PATH_MAX-1] = '\0';
4286
4287 if (linksize < 0)
4288 {
4289 char errbuf[SH_ERRBUF_SIZE];
4290 linksize = errno;
4291 tmp2 = sh_util_safe_name (theFile->fullpath);
4292 SH_MUTEX_LOCK(mutex_thread_nolog);
4293 sh_error_handle (level, FIL__, __LINE__, linksize, MSG_FI_RDLNK,
4294 sh_error_message (linksize, errbuf, sizeof(errbuf)), tmp2);
4295 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4296 SH_FREE(tmp2);
4297 SH_FREE(linknamebuf);
4298 theFile->link_path = sh_util_strdup("-");
4299 SL_RETURN((-1),_("sh_unix_getinfo"));
4300 }
4301
4302 if (linknamebuf[0] == '/')
4303 {
4304 theFile->link_path = sh_util_strdup (linknamebuf);
4305 }
4306 else
4307 {
4308 tmp = sh_util_dirname(theFile->fullpath);
4309 if (tmp) {
4310 theFile->link_path = SH_ALLOC(PATH_MAX);
4311 sl_strlcpy (theFile->link_path, tmp, PATH_MAX);
4312 SH_FREE(tmp);
4313 } else {
4314 theFile->link_path = SH_ALLOC(PATH_MAX);
4315 theFile->link_path[0] = '\0';
4316 }
4317 /*
4318 * Only attach '/' if not root directory. Handle "//", which
4319 * according to POSIX is implementation-defined, and may be
4320 * different from "/" (however, three or more '/' will collapse
4321 * to one).
4322 */
4323 tmp = theFile->link_path; while (*tmp == '/') ++tmp;
4324 if (*tmp != '\0')
4325 {
4326 sl_strlcat (theFile->link_path, "/", PATH_MAX);
4327 }
4328 sl_strlcat (theFile->link_path, linknamebuf, PATH_MAX);
4329 }
4330
4331 /* stat the link
4332 */
4333 stat_return = retry_lstat (FIL__, __LINE__, theFile->link_path, &lbuf);
4334
4335 /* check for error
4336 */
4337 if (stat_return != 0)
4338 {
4339 stat_return = errno;
4340 tmp = sh_util_safe_name (theFile->fullpath);
4341 tmp2 = sh_util_safe_name (theFile->link_path);
4342 if (stat_return != ENOENT)
4343 {
4344 uid_t euid;
4345 char errbuf[SH_ERRBUF_SIZE];
4346
4347 (void) sl_get_euid(&euid);
4348 SH_MUTEX_LOCK(mutex_thread_nolog);
4349 sh_error_handle (level, FIL__, __LINE__, stat_return,
4350 MSG_FI_STAT,
4351 _("lstat"),
4352 sh_error_message (stat_return,errbuf, sizeof(errbuf)),
4353 (long) euid,
4354 tmp2);
4355 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4356 }
4357 else
4358 {
4359 /* a dangling link -- everybody seems to have plenty of them
4360 */
4361 SH_MUTEX_LOCK(mutex_thread_nolog);
4362 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_DLNK,
4363 tmp, tmp2);
4364 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4365 }
4366 theFile->linkisok = BAD;
4367 SH_FREE(tmp);
4368 SH_FREE(tmp2);
4369 SH_FREE(linknamebuf);
4370 /*
4371 * changed Tue Feb 10 16:16:13 CET 2004:
4372 * add dangling symlinks into database
4373 * SL_RETURN((-1),_("sh_unix_getinfo"));
4374 */
4375 theFile->linkmode = 0;
4376 SL_RETURN((0),_("sh_unix_getinfo"));
4377 }
4378
4379 theFile->linkisok = GOOD;
4380
4381
4382 /* --- Determine file type. ---
4383 */
4384 sh_unix_getinfo_type (&lbuf, &type, theFile->link_c_mode);
4385 theFile->type = type;
4386
4387 /* --- Determine permissions. ---
4388 */
4389 sh_unix_getinfo_mode (&lbuf, &mode, theFile->link_c_mode);
4390 theFile->linkmode = lbuf.st_mode;
4391
4392 /* --- Output the link. ---
4393 */
4394 if (theFile->linkisok == GOOD)
4395 {
4396 tmp2 = sh_util_safe_name (linknamebuf);
4397 SH_MUTEX_LOCK(mutex_thread_nolog);
4398 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LLNK,
4399 theFile->link_c_mode, tmp2);
4400 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4401 SH_FREE(tmp2);
4402 }
4403 SH_FREE(linknamebuf);
4404 }
4405 else /* not a link, theFile->c_mode[0] != 'l' */
4406 {
4407 if (content)
4408 {
4409#ifdef HAVE_LIBZ
4410 unsigned long clen;
4411 unsigned char * compressed;
4412#ifdef HAVE_COMPRESSBOUND
4413 clen = compressBound(sh_string_len(content));
4414#else
4415 if (sh_string_len(content) > 10*SH_TXT_MAX)
4416 clen = SH_TXT_MAX;
4417 else
4418 clen = 13 + (int)(1.0001*sh_string_len(content));
4419#endif
4420 compressed = SH_ALLOC(clen);
4421 if (Z_OK == compress(compressed, &clen,
4422 (unsigned char *) sh_string_str(content),
4423 sh_string_len(content)))
4424 {
4425 if (clen < SH_TXT_MAX)
4426 {
4427 sh_util_base64_enc_alloc (&(theFile->link_path),
4428 (char *) compressed, clen);
4429 }
4430 else
4431 {
4432 char tmsg[128];
4433 char * tpath = sh_util_safe_name (theFile->fullpath);
4434 sl_snprintf(tmsg, sizeof(tmsg),
4435 _("compressed file too large (%lu bytes)"),
4436 clen);
4437 SH_MUTEX_LOCK(mutex_thread_nolog);
4438 sh_error_handle (SH_ERR_WARN, FIL__, __LINE__, -1,
4439 MSG_E_SUBGPATH, tmsg,
4440 _("sh_unix_getinfo"), tpath);
4441 SH_MUTEX_UNLOCK(mutex_thread_nolog);
4442 SH_FREE(tpath);
4443 }
4444 }
4445 SH_FREE(compressed);
4446#endif
4447 sh_string_destroy(&content);
4448 }
4449 }
4450 SL_RETURN((0),_("sh_unix_getinfo"));
4451}
4452
4453/* #if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE) */
4454#endif
4455
4456int sh_unix_unlock(char * lockfile, char * flag)
4457{
4458 int error = 0;
4459
4460 SL_ENTER(_("sh_unix_unlock"));
4461
4462 if (sh.flag.isdaemon == S_FALSE && flag == NULL)
4463 SL_RETURN((0),_("sh_unix_unlock"));
4464
4465 /* --- Logfile is not locked to us. ---
4466 */
4467 if (sh.flag.islocked == BAD && flag != NULL)
4468 SL_RETURN((-1),_("sh_unix_unlock"));
4469
4470 /* --- Check whether the directory is secure. ---
4471 */
4472 if (0 != tf_trust_check (lockfile, SL_YESPRIV))
4473 SL_RETURN((-1),_("sh_unix_unlock"));
4474
4475 /* --- Delete the lock file. ---
4476 */
4477 error = retry_aud_unlink (FIL__, __LINE__, lockfile);
4478
4479 if (error == 0)
4480 {
4481 if (flag != NULL)
4482 sh.flag.islocked = BAD; /* not locked anymore */
4483 }
4484 else if (flag != NULL)
4485 {
4486 char errbuf[SH_ERRBUF_SIZE];
4487 error = errno;
4488 sh_error_handle ((-1), FIL__, __LINE__, error, MSG_E_UNLNK,
4489 sh_error_message(error, errbuf, sizeof(errbuf)),
4490 lockfile);
4491 SL_RETURN((-1),_("sh_unix_unlock"));
4492 }
4493 SL_RETURN((0),_("sh_unix_unlock"));
4494}
4495
4496int sh_unix_check_piddir (char * pidpath)
4497{
4498 static struct stat buf;
4499 int status = 0;
4500 char * pid_dir;
4501
4502 SL_ENTER(_("sh_unix_check_piddir"));
4503
4504 pid_dir = sh_util_dirname (pidpath);
4505
4506 status = retry_lstat (FIL__, __LINE__, pid_dir, &buf);
4507
4508 if (status < 0 && errno == ENOENT)
4509 {
4510 status = mkdir (pid_dir, 0777);
4511 if (status < 0)
4512 {
4513 sh_error_handle ((-1), FIL__, __LINE__, status,
4514 MSG_E_SUBGEN,
4515 _("Cannot create PID directory"),
4516 _("sh_unix_check_piddir"));
4517 SH_FREE(pid_dir);
4518 SL_RETURN((-1),_("sh_unix_check_piddir"));
4519 }
4520 }
4521 else if (!S_ISDIR(buf.st_mode))
4522 {
4523 sh_error_handle ((-1), FIL__, __LINE__, status,
4524 MSG_E_SUBGEN,
4525 _("Path of PID directory refers to a non-directory object"),
4526 _("sh_unix_check_piddir"));
4527 SH_FREE(pid_dir);
4528 SL_RETURN((-1),_("sh_unix_check_piddir"));
4529 }
4530 SH_FREE(pid_dir);
4531 SL_RETURN((0),_("sh_unix_check_piddir"));
4532}
4533
4534int sh_unix_lock (char * lockfile, char * flag)
4535{
4536 int filed;
4537 int errnum;
4538 char myPid[64];
4539 SL_TICKET fd;
4540 extern int get_the_fd (SL_TICKET ticket);
4541
4542 SL_ENTER(_("sh_unix_lock"));
4543
4544 sprintf (myPid, "%ld\n", (long) sh.pid); /* known to fit */
4545
4546 if (flag == NULL) /* PID file, check for directory */
4547 {
4548 if (0 != sh_unix_check_piddir (lockfile))
4549 {
4550 SL_RETURN((-1),_("sh_unix_lock"));
4551 }
4552 }
4553
4554 fd = sl_open_safe_rdwr (FIL__, __LINE__,
4555 lockfile, SL_YESPRIV); /* fails if file exists */
4556
4557 if (!SL_ISERROR(fd))
4558 {
4559 errnum = sl_write (fd, myPid, sl_strlen(myPid));
4560 filed = get_the_fd(fd);
4561 fchmod (filed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
4562 sl_close (fd);
4563
4564 if (!SL_ISERROR(errnum))
4565 {
4566 if (flag != NULL)
4567 sh.flag.islocked = GOOD;
4568 SL_RETURN((0),_("sh_unix_lock"));
4569 }
4570 }
4571
4572 TPT((0, FIL__, __LINE__, _("msg=<open pid file failed>\n")));
4573 if (flag != NULL)
4574 sh.flag.islocked = BAD;
4575 SL_RETURN((-1),_("sh_unix_lock"));
4576
4577 /* notreached */
4578}
4579
4580
4581/* check whether file is locked
4582 */
4583int sh_unix_test_and_lock (char * filename, char * lockfile)
4584{
4585 static struct stat buf;
4586 int status = 0;
4587
4588
4589 SL_TICKET fd;
4590 char line_in[128];
4591
4592 SL_ENTER(_("sh_unix_test_and_lock"));
4593
4594 status = retry_lstat (FIL__, __LINE__, lockfile, &buf);
4595
4596 /* --- No lock file found, try to lock. ---
4597 */
4598
4599 if (status < 0 && errno == ENOENT)
4600 {
4601 if (0 == sh_unix_lock (lockfile, filename))
4602 {
4603 if (filename != NULL)
4604 sh.flag.islocked = GOOD;
4605 SL_RETURN((0),_("sh_unix_test_and_lock"));
4606 }
4607 else
4608 {
4609 sh_error_handle ((-1), FIL__, __LINE__, status,
4610 MSG_E_SUBGEN,
4611 (filename == NULL) ? _("Cannot create PID file (1)") : _("Cannot create lock file (1)"),
4612 _("sh_unix_test_and_lock"));
4613 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4614 }
4615 }
4616 else if (status == 0 && buf.st_size == 0)
4617 {
4618 if (filename != NULL)
4619 sh.flag.islocked = GOOD;
4620 sh_unix_unlock (lockfile, filename);
4621 if (filename != NULL)
4622 sh.flag.islocked = BAD;
4623 if (0 == sh_unix_lock (lockfile, filename))
4624 {
4625 if (filename != NULL)
4626 sh.flag.islocked = GOOD;
4627 SL_RETURN((0),_("sh_unix_test_and_lock"));
4628 }
4629 else
4630 {
4631 sh_error_handle ((-1), FIL__, __LINE__, status,
4632 MSG_E_SUBGEN,
4633 (filename == NULL) ? _("Cannot create PID file (2)") : _("Cannot create lock file (2)"),
4634 _("sh_unix_test_and_lock"));
4635 SL_RETURN((-1),_("sh_unix_test_and_lock"));
4636 }
4637 }
4638
4639 /* --- Check on lock. ---
4640 */
4641
4642 if (status >= 0)
4643 {
4644 fd = sl_open_read (FIL__, __LINE__, lockfile, SL_YESPRIV);
4645 if (SL_ISERROR(fd))
4646 sh_error_handle ((-1), FIL__, __LINE__, fd,
4647 MSG_E_SUBGEN,
4648 (filename == NULL) ? _("Cannot open PID file for read") : _("Cannot open lock file for read"),
4649 _("sh_unix_test_and_lock"));
4650 }
4651 else
4652 fd = -1;
4653
4654 if (!SL_ISERROR(fd))
4655 {
4656 /* read the PID in the lock file
4657 */
4658 status = sl_read (fd, line_in, sizeof(line_in));
4659 line_in[sizeof(line_in)-1] = '\0';
4660
4661 /* convert to numeric
4662 */
4663 if (status > 0)
4664 {
4665 errno = 0;
4666 status = strtol(line_in, (char **)NULL, 10);
4667 if (errno == ERANGE || status <= 0)
4668 {
4669 sh_error_handle ((-1), FIL__, __LINE__, status,
4670 MSG_E_SUBGEN,
4671 (filename == NULL) ? _("Bad PID in PID file") : _("Bad PID in lock file"),
4672 _("sh_unix_test_and_lock"));
4673
4674 status = -1;
4675 }
4676 }
4677 else
4678 {
4679 sh_error_handle ((-1), FIL__, __LINE__, status,
4680 MSG_E_SUBGEN,
4681 (filename == NULL) ? _("Cannot read PID file") : _("Cannot read lock file"),
4682 _("sh_unix_test_and_lock"));
4683 }
4684 sl_close(fd);
4685
4686 if (status > 0 && (unsigned int) status == sh.pid)
4687 {
4688 if (filename != NULL)
4689 sh.flag.islocked = GOOD;
4690 SL_RETURN((0),_("sh_unix_test_and_lock"));
4691 }
4692
4693
4694 /* --- Check whether the process exists. ---
4695 */
4696 if (status > 0)
4697 {
4698 errno = 0;
4699 status = aud_kill (FIL__, __LINE__, status, 0);
4700
4701 /* Does not exist, so remove the stale lock
4702 * and create a new one.
4703 */
4704 if (status < 0 && errno == ESRCH)
4705 {
4706 if (filename != NULL)
4707 sh.flag.islocked = GOOD;
4708 if (0 != sh_unix_unlock(lockfile, filename) && (filename !=NULL))
4709 sh.flag.islocked = BAD;
4710 else
4711 {
4712 if (0 == sh_unix_lock (lockfile, filename))
4713 {
4714 if (filename != NULL)
4715 sh.flag.islocked = GOOD;
4716 SL_RETURN((0),_("sh_unix_test_and_lock"));
4717 }
4718 else
4719 {
4720 sh_error_handle ((-1), FIL__, __LINE__, status,
4721 MSG_E_SUBGEN,
4722 (filename == NULL) ? _("Cannot create PID file (3)") : _("Cannot create lock file (3)"),
4723 _("sh_unix_test_and_lock"));
4724 }
4725 if (filename != NULL)
4726 sh.flag.islocked = BAD;
4727 }
4728 }
4729 else
4730 {
4731 sh_error_handle ((-1), FIL__, __LINE__, status,
4732 MSG_E_SUBGEN,
4733 (filename == NULL) ? _("Cannot remove stale PID file, PID may be a running process") : _("Cannot remove stale lock file, PID may be a running process"),
4734 _("sh_unix_test_and_lock"));
4735 if (filename != NULL)
4736 sh.flag.islocked = BAD;
4737 }
4738 }
4739 }
4740 SL_RETURN((-1),_("sh_unix_testlock"));
4741}
4742
4743/* write the PID file
4744 */
4745int sh_unix_write_pid_file()
4746{
4747 return sh_unix_test_and_lock(NULL, sh.srvlog.alt);
4748}
4749
4750/* write lock for filename
4751 */
4752int sh_unix_write_lock_file(char * filename)
4753{
4754 size_t len;
4755 int res;
4756 char * lockfile;
4757
4758 if (filename == NULL)
4759 return (-1);
4760
4761 len = sl_strlen(filename);
4762 if (sl_ok_adds(len, 6))
4763 len += 6;
4764 lockfile = SH_ALLOC(len);
4765 sl_strlcpy(lockfile, filename, len);
4766 sl_strlcat(lockfile, _(".lock"), len);
4767 res = sh_unix_test_and_lock(filename, lockfile);
4768 SH_FREE(lockfile);
4769 return res;
4770}
4771
4772/* rm lock for filename
4773 */
4774int sh_unix_rm_lock_file(char * filename)
4775{
4776 size_t len;
4777 int res;
4778 char * lockfile;
4779
4780 if (filename == NULL)
4781 return (-1);
4782
4783 len = sl_strlen(filename);
4784 if (sl_ok_adds(len, 6))
4785 len += 6;
4786 lockfile = SH_ALLOC(len);
4787 sl_strlcpy(lockfile, filename, len);
4788 sl_strlcat(lockfile, _(".lock"), len);
4789
4790 res = sh_unix_unlock(lockfile, filename);
4791 SH_FREE(lockfile);
4792 return res;
4793}
4794
4795/* rm lock for filename
4796 */
4797int sh_unix_rm_pid_file()
4798{
4799 return sh_unix_unlock(sh.srvlog.alt, NULL);
4800}
4801
4802/* Test whether file exists
4803 */
4804int sh_unix_file_exists(char * path)
4805{
4806 struct stat buf;
4807
4808 SL_ENTER(_("sh_unix_file_exists"));
4809
4810 if (0 == retry_lstat(FIL__, __LINE__, path, &buf))
4811 SL_RETURN( S_TRUE, _("sh_unix_file_exists"));
4812 else
4813 SL_RETURN( S_FALSE, _("sh_unix_file_exists"));
4814}
4815
4816
4817/* Test whether file exists, is a character device, and allows read
4818 * access.
4819 */
4820int sh_unix_device_readable(int fd)
4821{
4822 struct stat buf;
4823
4824 SL_ENTER(_("sh_unix_device_readable"));
4825
4826 if (retry_fstat(FIL__, __LINE__, fd, &buf) == -1)
4827 SL_RETURN( (-1), _("sh_unix_device_readable"));
4828 else if ( S_ISCHR(buf.st_mode) && 0 != (S_IROTH & buf.st_mode) )
4829 SL_RETURN( (0), _("sh_unix_device_readable"));
4830 else
4831 SL_RETURN( (-1), _("sh_unix_device_readable"));
4832}
4833
4834static char preq[16];
4835
4836/* return true if database is remote
4837 */
4838int file_is_remote ()
4839{
4840 static int init = 0;
4841 struct stat buf;
4842
4843 SL_ENTER(_("file_is_remote"));
4844
4845 if (init == 0)
4846 {
4847 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4848 ++init;
4849 }
4850 if (0 == sl_strncmp (sh.data.path, preq, 15))
4851 {
4852 if (sh.data.path[15] != '\0') /* should be start of path */
4853 {
4854 if (0 == stat(&(sh.data.path[15]), &buf))
4855 {
4856 SL_RETURN( S_FALSE, _("file_is_remote"));
4857 }
4858 }
4859 SL_RETURN( S_TRUE, _("file_is_remote"));
4860 }
4861 SL_RETURN( S_FALSE, _("file_is_remote"));
4862}
4863
4864/* Return the path to the configuration/database file.
4865 */
4866char * file_path(char what, char flag)
4867{
4868 static int init = 0;
4869
4870 SL_ENTER(_("file_path"));
4871
4872 if (init == 0)
4873 {
4874 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
4875 ++init;
4876 }
4877
4878 switch (what)
4879 {
4880
4881 case 'C':
4882 if (0 == sl_strncmp (sh.conf.path, preq, 15))
4883 {
4884#if defined(SH_WITH_SERVER)
4885 if (sh.flag.isserver == S_TRUE && sl_strlen(sh.conf.path) == 15)
4886 SL_RETURN( NULL, _("file_path"));
4887 if (sh.flag.isserver == S_TRUE)
4888 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4889#endif
4890 if (flag == 'R')
4891 SL_RETURN( preq, _("file_path"));
4892 if (flag == 'I')
4893 {
4894 if (sl_strlen(sh.conf.path) == 15)
4895 SL_RETURN( NULL, _("file_path"));
4896 else
4897 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
4898 }
4899 SL_RETURN ( preq, _("file_path"));
4900 }
4901 else
4902 SL_RETURN( sh.conf.path, _("file_path"));
4903 /* break; *//* unreachable */
4904
4905 case 'D':
4906 if (0 == sl_strncmp (sh.data.path, preq, 15))
4907 {
4908 if (flag == 'R')
4909 SL_RETURN( preq, _("file_path"));
4910 if (flag == 'W' && sl_strlen(sh.data.path) == 15)
4911 SL_RETURN (NULL, _("file_path"));
4912 if (flag == 'W')
4913 SL_RETURN( &(sh.data.path[15]), _("file_path"));
4914 }
4915 else
4916 SL_RETURN( sh.data.path, _("file_path"));
4917 break;
4918
4919 default:
4920 SL_RETURN( NULL, _("file_path"));
4921 }
4922
4923 return NULL; /* notreached */
4924}
4925/************************************************/
4926/**** Mlock Utilities ****/
4927/************************************************/
4928
4929#include <limits.h>
4930
4931int sh_unix_pagesize()
4932{
4933 int pagesize = 4096;
4934#if defined(_SC_PAGESIZE)
4935 pagesize = sysconf(_SC_PAGESIZE);
4936#elif defined(_SC_PAGE_SIZE)
4937 pagesize = sysconf(_SC_PAGE_SIZE);
4938#elif defined(HAVE_GETPAGESIZE)
4939 pagesize = getpagesize();
4940#elif defined(PAGESIZE)
4941 pagesize = PAGESIZE;
4942#endif
4943
4944 return ((pagesize > 0) ? pagesize : 4096);
4945}
4946
4947typedef struct sh_page_lt {
4948 unsigned long page_start;
4949 int page_refcount;
4950 char file[64];
4951 int line;
4952 struct sh_page_lt * next;
4953} sh_page_l;
4954
4955sh_page_l * sh_page_locked = NULL;
4956volatile int page_locking = 0;
4957
4958unsigned long sh_unix_lookup_page (void * in_addr, size_t len, int * num_pages)
4959{
4960 int pagesize = sh_unix_pagesize();
4961 unsigned long addr = (unsigned long) in_addr;
4962
4963 unsigned long pagebase;
4964 unsigned long pagediff;
4965 unsigned long pagenum = addr / pagesize;
4966
4967 SL_ENTER(_("sh_unix_lookup_page"));
4968#if 0
4969 fprintf(stderr, "mlock: --> base %ld, pagenum: %ld\n",
4970 addr, pagenum);
4971#endif
4972
4973 /* address of first page
4974 */
4975 pagebase = pagenum * pagesize;
4976
4977 /* number of pages
4978 */
4979 pagediff = (addr + len) - pagebase;
4980 pagenum = pagediff / pagesize;
4981 if (pagenum * pagesize < pagediff)
4982 ++pagenum;
4983
4984#if 0
4985 fprintf(stderr, "mlock: --> pagebase %ld, pagediff %ld, (addr + len) %ld\n",
4986 pagebase, pagediff, (addr + len));
4987#endif
4988
4989 *num_pages = pagenum;
4990 SL_RETURN((pagebase), _("sh_unix_lookup_page"));
4991}
4992
4993
4994#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
4995
4996SH_MUTEX_STATIC(mutex_mlock,PTHREAD_MUTEX_INITIALIZER);
4997
4998int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
4999{
5000 int num_pages;
5001 int status = 0;
5002 int pagesize;
5003 sh_page_l * page_list;
5004 unsigned long addr;
5005#ifdef TEST_MLOCK
5006 int i = 0;
5007#endif
5008
5009 SL_ENTER(_("sh_unix_mlock"));
5010
5011 /* There's no cancellation point here, except if tracing is on
5012 */
5013 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5014
5015 page_list = sh_page_locked;
5016
5017 if (0 != page_locking)
5018 {
5019 status = -1;
5020 goto exit_mlock;
5021 }
5022
5023 page_locking = 1;
5024
5025 pagesize = sh_unix_pagesize();
5026 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
5027
5028#ifdef TEST_MLOCK
5029 fprintf(stderr, "mlock: addr %ld, base %ld, pages: %d, length %d\n",
5030 (unsigned long) in_addr, addr, num_pages, len);
5031#endif
5032
5033 /* increase refcount of locked pages
5034 * addr is first page; num_pages is #(consecutive pages) to lock
5035 */
5036
5037 while ((page_list != NULL) && (num_pages > 0))
5038 {
5039#ifdef TEST_MLOCK
5040 fprintf(stderr, "mlock: check page %d: %ld [%d]\n",
5041 i, page_list->page_start, page_list->page_refcount);
5042#endif
5043 if (page_list->page_start == addr)
5044 {
5045 page_list->page_refcount += 1;
5046 num_pages -= 1;
5047 addr += pagesize;
5048#ifdef TEST_MLOCK
5049 fprintf(stderr, "mlock: found page %d: %ld [%d], next page %ld\n",
5050 i, page_list->page_start, page_list->page_refcount, addr);
5051#endif
5052 }
5053#ifdef TEST_MLOCK
5054 ++i;
5055#endif
5056 page_list = page_list->next;
5057 }
5058
5059 /* mlock some more pages, if needed
5060 */
5061 while (num_pages > 0)
5062 {
5063#ifdef TEST_MLOCK
5064 fprintf(stderr, "mlock: lock page %d: mlock %ld [num_pages %d]\n",
5065 i, addr, num_pages);
5066 ++i;
5067#endif
5068 page_list = SH_ALLOC(sizeof(sh_page_l));
5069 page_list->page_start = addr;
5070 page_list->page_refcount = 1;
5071 sl_strlcpy(page_list->file, file, 64);
5072 page_list->line = line;
5073 status = mlock( (void *) addr, pagesize);
5074 if (status != 0)
5075 {
5076#ifdef TEST_MLOCK
5077 char errbuf[SH_ERRBUF_SIZE];
5078 fprintf(stderr, "mlock: error: %s\n",
5079 sh_error_message(errno, errbuf, sizeof(errbuf)));
5080#endif
5081 SH_FREE(page_list);
5082 page_locking = 0;
5083 goto exit_mlock;
5084 }
5085 page_list->next = sh_page_locked;
5086 sh_page_locked = page_list;
5087 num_pages -= 1;
5088 addr += pagesize;
5089 }
5090 page_locking = 0;
5091
5092 exit_mlock:
5093 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5094
5095 SL_RETURN((status), _("sh_unix_mlock"));
5096}
5097#else
5098int sh_unix_mlock (const char * file, int line, void * in_addr, size_t len)
5099{
5100 (void) file; (void) line;
5101 (void) in_addr; (void) len;
5102 return -1;
5103}
5104#endif
5105
5106#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5107int sh_unix_munlock (void * in_addr, size_t len)
5108{
5109 int num_pages;
5110 int unlocked;
5111 int status;
5112 int pagesize;
5113 sh_page_l * page_list;
5114 sh_page_l * page_last;
5115 unsigned long addr;
5116
5117 int test_count;
5118 int test_status;
5119 int test_pages;
5120
5121#ifdef TEST_MLOCK
5122 int i = 0;
5123#endif
5124
5125 SL_ENTER(_("sh_unix_munlock"));
5126
5127 /* There's no cancellation point here, except if tracing is on
5128 */
5129 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5130
5131 unlocked = 0;
5132 status = 0;
5133 page_list = sh_page_locked;
5134
5135 if (0 != page_locking)
5136 {
5137 status = -1;
5138 goto exit_munlock;
5139 }
5140 page_locking = 1;
5141
5142 pagesize = sh_unix_pagesize();
5143 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
5144
5145#ifdef TEST_MLOCK
5146 fprintf(stderr, "munlock: in_addr %ld, addr %ld, pages: %d, length %d\n",
5147 (unsigned long) in_addr, addr, num_pages, len);
5148#endif
5149
5150 test_pages = num_pages;
5151
5152 /* reduce refcount of locked pages
5153 * addr is first page; num_pages is #(consecutive pages) to lock
5154 */
5155 while ((page_list != NULL) && (num_pages > 0))
5156 {
5157#ifdef TEST_MLOCK
5158 fprintf(stderr, "munlock: page %d: %ld [%d]\n",
5159 i, page_list->page_start, page_list->page_refcount);
5160#endif
5161
5162 test_status = 0;
5163 for (test_count = 0; test_count < test_pages; ++test_count)
5164 {
5165 if (page_list->page_start == (addr + (test_count * pagesize)))
5166 {
5167 test_status = 1;
5168 break;
5169 }
5170 }
5171
5172 if (test_status == 1)
5173 {
5174 page_list->page_refcount -= 1;
5175 if (page_list->page_refcount == 0)
5176 {
5177 status = munlock ( (void *) addr, pagesize);
5178 ++unlocked;
5179 }
5180 num_pages -= 1;
5181#ifdef TEST_MLOCK
5182 fprintf(stderr,
5183 "munlock: page %d: %ld [refcount %d], refcount reduced\n",
5184 i, page_list->page_start, page_list->page_refcount);
5185#endif
5186 }
5187#ifdef TEST_MLOCK
5188 ++i;
5189#endif
5190 page_list = page_list->next;
5191 }
5192
5193#ifdef TEST_MLOCK
5194 i = 0;
5195#endif
5196
5197 if (unlocked > 0)
5198 {
5199 page_list = sh_page_locked;
5200 page_last = sh_page_locked;
5201
5202 while ((page_list != NULL) && (unlocked > 0))
5203 {
5204 if (page_list->page_refcount == 0)
5205 {
5206#ifdef TEST_MLOCK
5207 fprintf(stderr, "munlock: remove page %d: %ld [refcount %d]\n",
5208 i, page_list->page_start, page_list->page_refcount);
5209#endif
5210 if (page_last != page_list)
5211 {
5212 page_last->next = page_list->next;
5213 SH_FREE(page_list);
5214 page_list = page_last->next;
5215 }
5216 else
5217 {
5218 page_last = page_list->next;
5219 if (page_list == sh_page_locked)
5220 sh_page_locked = page_list->next;
5221 SH_FREE(page_list);
5222 page_list = page_last;
5223 }
5224 --unlocked;
5225 }
5226 else
5227 {
5228#ifdef TEST_MLOCK
5229 fprintf(stderr, "munlock: skip page %d: %ld [refcount %d]\n",
5230 i, page_list->page_start, page_list->page_refcount);
5231#endif
5232
5233 page_last = page_list;
5234 page_list = page_list->next;
5235 }
5236#ifdef TEST_MLOCK
5237 ++i;
5238#endif
5239 }
5240 }
5241
5242 page_locking = 0;
5243
5244 exit_munlock:
5245 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5246 SL_RETURN((status), _("sh_unix_munlock"));
5247}
5248#else
5249int sh_unix_munlock (void * in_addr, size_t len)
5250{
5251 (void) in_addr; (void) len;
5252 return -1;
5253}
5254#endif
5255
5256int sh_unix_count_mlock()
5257{
5258 int i = 0;
5259 char str[32][64];
5260 sh_page_l * page_list;
5261
5262 SL_ENTER(_("sh_unix_count_mlock"));
5263
5264#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5265 /* There's no cancellation point here, except if tracing is on
5266 */
5267 SH_MUTEX_LOCK_UNSAFE(mutex_mlock);
5268#endif
5269
5270 page_list = sh_page_locked;
5271
5272 while (page_list != NULL)
5273 {
5274#ifdef WITH_TPT
5275 if (i < 32)
5276 sl_snprintf(str[i], 64, _("file: %s line: %d page: %d"),
5277 page_list->file, page_list->line, i+1);
5278#endif
5279 page_list = page_list->next;
5280 ++i;
5281 }
5282
5283#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
5284 SH_MUTEX_UNLOCK_UNSAFE(mutex_mlock);
5285#endif
5286
5287#ifdef WITH_TPT
5288 {
5289 int j = 0;
5290 while (j < i && j < 32)
5291 {
5292 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, j, MSG_E_SUBGEN,
5293 str[j], _("sh_unix_count_mlock"));
5294 ++j;
5295 }
5296 }
5297#endif
5298
5299 sl_snprintf(str[0], 64, _("%d pages locked"), i);
5300 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, i, MSG_E_SUBGEN,
5301 str[0], _("sh_unix_count_mlock"));
5302 SL_RETURN((i), _("sh_unix_count_mlock"));
5303}
5304
5305/************************************************/
5306/************************************************/
5307/**** Stealth Utilities ****/
5308/************************************************/
5309/************************************************/
5310#ifdef SH_STEALTH
5311
5312void sh_unix_xor_code (char * str, int len)
5313{
5314 register int i;
5315
5316 for (i = 0; i < len; ++i) str[i] ^= (char) XOR_CODE;
5317 return;
5318}
5319
5320#if !defined(SH_STEALTH_MICRO)
5321
5322
5323int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
5324 unsigned long * bytes_read);
5325unsigned long first_hex_block(SL_TICKET fd, unsigned long * max);
5326
5327/*
5328 * --- Get hidden data from a block of hex data. ---
5329 */
5330int sh_unix_getline_stealth (SL_TICKET fd, char * str, int len)
5331{
5332 int add_off = 0, llen;
5333 static unsigned long off_data = 0;
5334 static unsigned long max_data = 0;
5335 static unsigned long bytes_read = 0;
5336 static int stealth_init = BAD;
5337
5338 SL_ENTER(_("sh_unix_getline_stealth"));
5339
5340 if (str == NULL)
5341 {
5342 off_data = 0;
5343 max_data = 0;
5344 bytes_read = 0;
5345 stealth_init = BAD;
5346 SL_RETURN(0, _("sh_unix_getline_stealth"));
5347 }
5348
5349 /* --- Initialize. ---
5350 */
5351 if (stealth_init == BAD)
5352 {
5353 off_data = first_hex_block(fd, &max_data);
5354 if (off_data == 0)
5355 {
5356 dlog(1, FIL__, __LINE__,
5357 _("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"));
5358 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
5359 _("Stealth config file."));
5360 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
5361 }
5362 stealth_init = GOOD;
5363 max_data += off_data;
5364 }
5365
5366 /* --- Seek to proper position. ---
5367 */
5368 if (bytes_read >= max_data || add_off < 0)
5369 {
5370 dlog(1, FIL__, __LINE__,
5371 _("The capacity of the container image file for the stealth config file seems to be too small. Your config file is likely truncated.\n"));
5372 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
5373 _("Stealth config file."));
5374 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
5375 }
5376 sl_seek(fd, off_data);
5377
5378 /* --- Read one line. ---
5379 */
5380 add_off = hideout_hex_block(fd, (unsigned char *) str, len, &bytes_read);
5381 off_data += add_off;
5382
5383 llen = sl_strlen(str);
5384 SL_RETURN(llen, _("sh_unix_getline_stealth"));
5385}
5386
5387int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len,
5388 unsigned long * bytes_read)
5389{
5390
5391 register int i, j, k;
5392 unsigned char c, e;
5393 register int num;
5394 unsigned char mask[9] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
5395 unsigned long here = 0;
5396 unsigned long retval = 0;
5397 unsigned long bread = 0;
5398
5399 SL_ENTER(_("hideout_hex_block"));
5400
5401 ASSERT_RET((len > 1), _("len > 1"), (0));
5402
5403 --len;
5404
5405 i = 0;
5406 while (i < len)
5407 {
5408 for (j = 0; j < 8; ++j)
5409 {
5410
5411 /* --- Get a low byte, modify, read back. ---
5412 */
5413 for (k = 0; k < 2; ++k)
5414 {
5415 /* -- Skip whitespace. ---
5416 */
5417 c = ' ';
5418 do {
5419 do {
5420 num = sl_read (fd, &c, 1);
5421 } while (num == 0 && errno == EINTR);
5422 if (num > 0)
5423 ++here;
5424 else if (num == 0)
5425 SL_RETURN((0), _("hideout_hex_block"));
5426 else
5427 SL_RETURN((-1), _("hideout_hex_block"));
5428 } while (c == '\n' || c == '\t' || c == '\r' ||
5429 c == ' ');
5430 }
5431
5432
5433 /* --- e is the value of the low byte. ---
5434 */
5435 e = (unsigned char) sh_util_hexchar( c );
5436 if ((e & mask[7]) != 0) /* bit is set */
5437 str[i] |= mask[j];
5438 else /* bit is not set */
5439 str[i] &= ~mask[j];
5440
5441 bread += 1;
5442 }
5443 if (str[i] == '\n') break;
5444 ++i;
5445 }
5446
5447 if (i != 0)
5448 str[i] = '\0';
5449 else
5450 str[i+1] = '\0'; /* keep newline and terminate */
5451 retval += here;
5452 *bytes_read += (bread/8);
5453
5454 SL_RETURN(retval, _("hideout_hex_block"));
5455}
5456
5457/* --- Get offset of first data block. ---
5458 */
5459unsigned long first_hex_block(SL_TICKET fd, unsigned long * max)
5460{
5461 unsigned int i;
5462 long num = 1;
5463 unsigned long lnum;
5464 char c;
5465 int nothex = 0;
5466 unsigned long retval = 0;
5467 unsigned int this_line = 0;
5468 char theline[SH_BUFSIZE];
5469
5470 SL_ENTER(_("first_hex_block"));
5471
5472 *max = 0;
5473
5474 while (1)
5475 {
5476 theline[0] = '\0';
5477 this_line = 0;
5478 c = '\0';
5479 while (c != '\n' && num > 0 && this_line < (sizeof(theline)-1))
5480 {
5481 do {
5482 num = sl_read (fd, &c, 1);
5483 } while (num == 0 && errno == EINTR);
5484 if (num > 0)
5485 theline[this_line] = c;
5486 else
5487 SL_RETURN((0), _("first_hex_block"));
5488 ++this_line;
5489 }
5490 theline[this_line] = '\0';
5491
5492 /* not only 'newline' */
5493 if (this_line > 60)
5494 {
5495 nothex = 0;
5496 i = 0;
5497 while (nothex == 0 && i < (this_line-1))
5498 {
5499 if (! isxdigit((int)theline[i])) nothex = 1;
5500 ++i;
5501 }
5502 if (nothex == 1) retval += this_line;
5503 }
5504 else
5505 {
5506 nothex = 1;
5507 retval += this_line;
5508 }
5509
5510 if (nothex == 0)
5511 {
5512 *max = 0;
5513 do {
5514 do {
5515 num = sl_read (fd, theline, SH_BUFSIZE);
5516 } while (num == 0 && errno == EINTR);
5517 if (num > 0)
5518 {
5519 lnum = (unsigned long) num;
5520 for (i = 0; i < lnum; ++i)
5521 {
5522 c = theline[i];
5523 if (c == '\n' || c == '\t' || c == '\r' || c == ' ')
5524 ;
5525 else if (!isxdigit((int)c))
5526 break;
5527 else
5528 *max += 1;
5529 }
5530 }
5531 } while (num > 0);
5532
5533 *max /= 16;
5534 SL_RETURN((retval), _("first_hex_block"));
5535 }
5536
5537 }
5538 /* SL_RETURN((0), _("first_hex_block")); *//* unreachable */
5539}
5540
5541 /* if !defined(SH_STEALTH_MICRO) */
5542#endif
5543
5544 /* ifdef SH_STEALTH */
5545#endif
5546
5547/*
5548 * anti-debugger code
5549 */
5550#if defined(SCREW_IT_UP)
5551
5552#if defined(HAVE_PTHREAD)
5553
5554static pthread_key_t gSigtrapVariables_key;
5555static pthread_once_t gSigtrapVariables_key_once = PTHREAD_ONCE_INIT;
5556
5557static inline void make_gSigtrapVariables_key()
5558{
5559 (void) pthread_key_create(&gSigtrapVariables_key, free);
5560}
5561
5562struct sh_sigtrap_variables * sh_sigtrap_variables_get()
5563{
5564 void * ptr;
5565
5566 (void) pthread_once(&gSigtrapVariables_key_once, make_gSigtrapVariables_key);
5567
5568 ptr = pthread_getspecific(gSigtrapVariables_key);
5569 if (ptr == NULL) {
5570 ptr = malloc(sizeof(struct sh_sigtrap_variables));
5571 if (ptr == NULL) {
5572 return NULL;
5573 }
5574 (void) pthread_setspecific(gSigtrapVariables_key, ptr);
5575 }
5576
5577 return (struct sh_sigtrap_variables *) ptr;
5578}
5579
5580/* !defined(HAVE_PTHREAD) */
5581#else
5582
5583static struct sh_sigtrap_variables global_sigtrap_variables;
5584struct sh_sigtrap_variables * sh_sigtrap_variables_get()
5585{
5586 return &global_sigtrap_variables;
5587}
5588
5589#endif
5590
5591int sh_sigtrap_max_duration_set (const char * str)
5592{
5593 /* For security (prevent reloading with larger value)
5594 * this value can only be set once.
5595 */
5596 static int once = 0;
5597 int i;
5598
5599 SL_ENTER(_("sh_sigtrap_max_duration_set"));
5600
5601 i = atoi (str);
5602
5603 if (i >= 0 && once == 0)
5604 {
5605 sh.sigtrap_max_duration = i;
5606 once = 1;
5607 }
5608 else
5609 {
5610 SL_RETURN ((-1), _("sh_sigtrap_max_duration_set"));
5611 }
5612 SL_RETURN( (0), _("sh_sigtrap_max_duration_set"));
5613}
5614
5615void sh_sigtrap_handler (int signum)
5616{
5617 struct sh_sigtrap_variables * sigtrap_variables;
5618 sigtrap_variables = sh_sigtrap_variables_get();
5619 if (sigtrap_variables == NULL) {
5620 /* Perhaps, it's better to not die, and to continue using Samhain,
5621 even if this part does not work. */
5622 return;
5623 }
5624
5625#ifdef HAVE_GETTIMEOFDAY
5626 {
5627 struct timeval tv;
5628 long difftv;
5629
5630 gettimeofday(&tv, NULL);
5631 difftv = (tv.tv_sec - sigtrap_variables->save_tv.tv_sec) * 1000000 +
5632 (tv.tv_usec - sigtrap_variables->save_tv.tv_usec);
5633 if (difftv > sh.sigtrap_max_duration)
5634 raise(SIGKILL);
5635 }
5636#endif
5637
5638 sigtrap_variables->not_traced = signum;
5639 return;
5640}
5641#endif
Note: See TracBrowser for help on using the repository browser.