source: trunk/src/sh_unix.c@ 30

Last change on this file since 30 was 30, checked in by rainer, 19 years ago

Release candidate 3 for version 2.2.0
File size: 97.7 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
28
29#ifdef HAVE_MEMORY_H
30#include <memory.h>
31#endif
32
33#ifdef HAVE_UNISTD_H
34#include <errno.h>
35#include <signal.h>
36#include <pwd.h>
37#include <grp.h>
38#include <sys/types.h>
39#include <sys/stat.h>
40#include <sys/resource.h>
41#include <fcntl.h>
42#include <unistd.h>
43#include <sys/wait.h>
44
45/*********************
46#ifdef HAVE_SYS_VFS_H
47#include <sys/vfs.h>
48#endif
49**********************/
50#endif
51
52#if TIME_WITH_SYS_TIME
53#include <sys/time.h>
54#include <time.h>
55#else
56#if HAVE_SYS_TIME_H
57#include <sys/time.h>
58#else
59#include <time.h>
60#endif
61#endif
62
63#ifdef HAVE_SYS_SELECT_H
64#include <sys/select.h>
65#endif
66
67#ifndef FD_SET
68#define NFDBITS 32
69#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
70#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
71#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
72#endif /* !FD_SET */
73#ifndef FD_SETSIZE
74#define FD_SETSIZE 32
75#endif
76#ifndef FD_ZERO
77#define FD_ZERO(p) memset((char *)(p), '\0', sizeof(*(p)))
78#endif
79
80
81#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
82#include <sys/mman.h>
83#endif
84
85#include "samhain.h"
86#include "sh_error.h"
87#include "sh_unix.h"
88#include "sh_utils.h"
89#include "sh_mem.h"
90#include "sh_hash.h"
91#include "sh_tools.h"
92#include "sh_tiger.h"
93#include "sh_prelink.h"
94
95/* moved here from far below
96 */
97#include <netdb.h>
98
99#define SH_NEED_PWD_GRP
100#define SH_NEED_GETHOSTBYXXX
101#include "sh_static.h"
102
103#ifndef HAVE_LSTAT
104#define lstat stat
105#endif
106
107#if defined(S_IFLNK) && !defined(S_ISLNK)
108#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
109#else
110#if !defined(S_ISLNK)
111#define S_ISLNK(mode) (0)
112#endif
113#endif
114
115#if defined(S_IFSOCK) && !defined(S_ISSOCK)
116#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
117#else
118#if !defined(S_ISSOCK)
119#define S_ISSOCK(mode) (0)
120#endif
121#endif
122
123#undef FIL__
124#define FIL__ _("sh_unix.c")
125
126unsigned long mask_PRELINK = MASK_PRELINK_;
127unsigned long mask_USER0 = MASK_USER_;
128unsigned long mask_USER1 = MASK_USER_;
129unsigned long mask_USER2 = MASK_USER_;
130unsigned long mask_USER3 = MASK_USER_;
131unsigned long mask_USER4 = MASK_USER_;
132unsigned long mask_ALLIGNORE = MASK_ALLIGNORE_;
133unsigned long mask_ATTRIBUTES = MASK_ATTRIBUTES_;
134unsigned long mask_LOGFILES = MASK_LOGFILES_;
135unsigned long mask_LOGGROW = MASK_LOGGROW_;
136unsigned long mask_READONLY = MASK_READONLY_;
137unsigned long mask_NOIGNORE = MASK_NOIGNORE_;
138
139
140extern char **environ;
141
142int sh_unix_maskreset()
143{
144 mask_PRELINK = MASK_PRELINK_;
145 mask_USER0 = MASK_USER_;
146 mask_USER1 = MASK_USER_;
147 mask_USER2 = MASK_USER_;
148 mask_USER3 = MASK_USER_;
149 mask_USER4 = MASK_USER_;
150 mask_ALLIGNORE = MASK_ALLIGNORE_;
151 mask_ATTRIBUTES = MASK_ATTRIBUTES_;
152 mask_LOGFILES = MASK_LOGFILES_;
153 mask_LOGGROW = MASK_LOGGROW_;
154 mask_READONLY = MASK_READONLY_;
155 mask_NOIGNORE = MASK_NOIGNORE_;
156 return 0;
157}
158
159
160#ifdef SYS_SIGLIST_DECLARED
161/* extern const char * const sys_siglist[]; */
162#else
163char * sh_unix_siglist (int signum)
164{
165 switch (signum)
166 {
167#ifdef SIGHUP
168 case SIGHUP:
169 return _("Hangup");
170#endif
171#ifdef SIGINT
172 case SIGINT:
173 return _("Interrupt");
174#endif
175#ifdef SIGQUIT
176 case SIGQUIT:
177 return _("Quit");
178#endif
179#ifdef SIGILL
180 case SIGILL:
181 return _("Illegal instruction");
182#endif
183#ifdef SIGTRAP
184 case SIGTRAP:
185 return _("Trace/breakpoint trap");
186#endif
187#ifdef SIGABRT
188 case SIGABRT:
189 return _("IOT trap/Abort");
190#endif
191#ifdef SIGBUS
192 case SIGBUS:
193 return _("Bus error");
194#endif
195#ifdef SIGFPE
196 case SIGFPE:
197 return _("Floating point exception");
198#endif
199#ifdef SIGUSR1
200 case SIGUSR1:
201 return _("User defined signal 1");
202#endif
203#ifdef SIGSEGV
204 case SIGSEGV:
205 return _("Segmentation fault");
206#endif
207#ifdef SIGUSR2
208 case SIGUSR2:
209 return _("User defined signal 2");
210#endif
211#ifdef SIGPIPE
212 case SIGPIPE:
213 return _("Broken pipe");
214#endif
215#ifdef SIGALRM
216 case SIGALRM:
217 return _("Alarm clock");
218#endif
219#ifdef SIGTERM
220 case SIGTERM:
221 return _("Terminated");
222#endif
223#ifdef SIGSTKFLT
224 case SIGSTKFLT:
225 return _("Stack fault");
226#endif
227#ifdef SIGCHLD
228 case SIGCHLD:
229 return _("Child exited");
230#endif
231#ifdef SIGCONT
232 case SIGCONT:
233 return _("Continued");
234#endif
235#ifdef SIGSTOP
236 case SIGSTOP:
237 return _("Stopped");
238#endif
239#ifdef SIGTSTP
240 case SIGTSTP:
241 return _("Stop typed at tty");
242#endif
243#ifdef SIGTTIN
244 case SIGTTIN:
245 return _("Stopped (tty input)");
246#endif
247#ifdef SIGTTOU
248 case SIGTTOU:
249 return _("Stopped (tty output)");
250#endif
251#ifdef SIGURG
252 case SIGURG:
253 return _("Urgent condition");
254#endif
255#ifdef SIGXCPU
256 case SIGXCPU:
257 return _("CPU time limit exceeded");
258#endif
259#ifdef SIGXFSZ
260 case SIGXFSZ:
261 return _("File size limit exceeded");
262#endif
263#ifdef SIGVTALRM
264 case SIGVTALRM:
265 return _("Virtual time alarm");
266#endif
267#ifdef SIGPROF
268 case SIGPROF:
269 return _("Profile signal");
270#endif
271#ifdef SIGWINCH
272 case SIGWINCH:
273 return _("Window size changed");
274#endif
275#ifdef SIGIO
276 case SIGIO:
277 return _("Possible I/O");
278#endif
279#ifdef SIGPWR
280 case SIGPWR:
281 return _("Power failure");
282#endif
283#ifdef SIGUNUSED
284 case SIGUNUSED:
285 return _("Unused signal");
286#endif
287 }
288 return _("Unknown");
289}
290#endif
291
292
293/* Log from within a signal handler without using any
294 * functions that are not async signal safe.
295 *
296 * This is the safe_itoa helper function.
297 */
298char * safe_itoa(int i, char * str, int size)
299{
300 unsigned int u;
301 int iisneg = 0;
302 char *p = &str[size-1];
303
304 *p = '\0';
305 if (i < 0) {
306 iisneg = 1;
307 u = ((unsigned int)(-(1+i))) + 1;
308 } else {
309 u = i;
310 }
311 do {
312 --p;
313 *p = '0' + (u % 10);
314 u /= 10;
315 } while (u && (p != str));
316 if ((iisneg == 1) && (p != str)) {
317 --p;
318 *p = '-';
319 }
320 return p;
321}
322
323/* Log from within a signal handler without using any
324 * functions that are not async signal safe.
325 *
326 * This is the safe_logger function.
327 * Arguments: signal (signal number), method (0=logger, 1=stderr), thepid (pid)
328 */
329extern int OnlyStderr;
330
331int safe_logger (int signal, int method, char * details)
332{
333 int i = 0;
334 int status = -1;
335 struct stat buf;
336 pid_t newpid;
337 char str[128];
338 char * p;
339
340 char l0[64], l1[64], l2[64], l3[64];
341 char a0[32], a1[32], a2[32];
342 char e0[128];
343 char msg[128];
344
345 char * locations[] = { NULL, NULL, NULL, NULL, NULL };
346 char * envp[] = { NULL, NULL };
347 char * argp[] = { NULL, NULL, NULL, NULL, NULL };
348
349 pid_t thepid = getpid();
350
351 if ((sh.flag.isdaemon == S_FALSE) || (OnlyStderr == S_TRUE))
352 method = 1;
353
354 /* seems that solaris cc needs this way of initializing ...
355 */
356 locations[0] = l0;
357 locations[1] = l1;
358 locations[2] = l2;
359 locations[3] = l3;
360
361 envp[0] = e0;
362
363 argp[0] = a0;
364 argp[1] = a1;
365 argp[2] = a2;
366
367 sl_strlcpy(msg, _("samhain["), 128);
368 p = safe_itoa((int) thepid, str, 128);
369 if (p && *p)
370 sl_strlcat(msg, p, 128);
371 if (signal == 0)
372 {
373 if (details == NULL) {
374 sl_strlcat(msg, _("]: out of memory"), 128);
375 } else {
376 sl_strlcat(msg, _("]: "), 128);
377 sl_strlcat(msg, details, 128);
378 }
379 }
380 else
381 {
382 sl_strlcat(msg, _("]: exit on signal "), 128);
383 p = safe_itoa(signal, str, 128);
384 if (p && *p)
385 sl_strlcat(msg, p, 128);
386 }
387
388 if (method == 1) {
389#ifndef STDERR_FILENO
390#define STDERR_FILENO 2
391#endif
392 write(STDERR_FILENO, msg, strlen(msg));
393 write(STDERR_FILENO, "\n", 1);
394 return 0;
395 }
396
397 sl_strlcpy (l0, _("/usr/bin/logger"), 64);
398 sl_strlcpy (l1, _("/usr/sbin/logger"), 64);
399 sl_strlcpy (l2, _("/usr/ucb/logger"), 64);
400 sl_strlcpy (l3, _("/bin/logger"), 64);
401
402 sl_strlcpy (a0, _("logger"), 32);
403 sl_strlcpy (a1, _("-p"), 32);
404 sl_strlcpy (a2, _("daemon.alert"), 32);
405
406 sl_strlcpy (e0,
407 _("PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/ucb:/usr/local/bin"),
408 128);
409
410 while (locations[i] != NULL) {
411 status = stat(locations[i], &buf);
412 if (status == 0)
413 break;
414 ++i;
415 }
416
417 if (locations[i] != NULL) {
418 argp[3] = msg;
419 newpid = fork();
420 if (newpid == 0) {
421 execve(locations[i], argp, envp);
422 _exit(1);
423 }
424 else if (newpid > 0) {
425 waitpid(newpid, &status, WUNTRACED);
426 }
427 }
428 return 0;
429}
430
431void safe_fatal (int signal, int method, char * details,
432 char * file, int line)
433{
434 char msg[128];
435 char str[128];
436 char * p;
437 p = safe_itoa((int) line, str, 128);
438 sl_strlcpy(msg, _("FATAL: "), 128);
439 sl_strlcat(msg, file, 128);
440 sl_strlcat(msg, ": ", 128);
441 if (p && (*p)) {
442 sl_strlcat(msg, p , 128);
443 sl_strlcat(msg, ": ", 128);
444 }
445 sl_strlcat(msg, details, 128);
446 safe_logger (signal, method, msg);
447 _exit(EXIT_FAILURE);
448}
449
450extern char sh_sig_msg[64];
451
452volatile int immediate_exit_normal = 0;
453
454#if defined(SA_SIGACTION_WORKS)
455static
456void sh_unix_sigexit (int mysignal, siginfo_t * signal_info, void * signal_add)
457#else
458static
459void sh_unix_sigexit (int mysignal)
460#endif
461{
462
463#if defined(SA_SIGACTION_WORKS)
464 if (signal_info != NULL && signal_info->si_code == SI_USER &&
465 mysignal != SIGTERM && mysignal != SIGINT)
466 {
467 return;
468 }
469
470 /* avoid compiler warning (unused var)
471 */
472 (void) signal_add;
473#endif
474
475 /*
476 * Block re-entry
477 */
478 if (immediate_exit_normal > 0)
479 {
480 ++immediate_exit_normal;
481 if ((skey != NULL) && (immediate_exit_normal == 2))
482 memset (skey, '\0', sizeof(sh_key_t));
483 if (immediate_exit_normal == 2)
484 {
485 chdir ("/");
486 safe_logger (mysignal, 0, NULL);
487 }
488 _exit(mysignal);
489 }
490 else
491 {
492 immediate_exit_normal = 1;
493 }
494
495#ifdef SYS_SIGLIST_DECLARED
496 strncpy (sh_sig_msg, sys_siglist[mysignal], 40);
497#else
498 strncpy (sh_sig_msg, sh_unix_siglist(mysignal), 40);
499#endif
500 sh_sig_msg[63] = '\0';
501
502 ++sig_raised;
503 ++sig_urgent;
504 sig_termfast = 1;
505 return;
506}
507
508volatile int immediate_exit_fast = 0;
509
510#if defined(SA_SIGACTION_WORKS)
511static
512void sh_unix_sigexit_fast (int mysignal, siginfo_t * signal_info,
513 void * signal_add)
514#else
515static
516void sh_unix_sigexit_fast (int mysignal)
517#endif
518{
519#if defined(SA_SIGACTION_WORKS)
520 if (signal_info != NULL && signal_info->si_code == SI_USER)
521 {
522 return;
523 }
524#endif
525
526 /* avoid compiler warning (unused var)
527 */
528#if defined(SA_SIGACTION_WORKS)
529 (void) signal_add;
530#endif
531
532 /* Check whether the heap is ok; otherwise _exit
533 */
534#if !defined(SL_DEBUG)
535 ++immediate_exit_fast;
536 if (skey != NULL && immediate_exit_fast < 2)
537 memset (skey, '\0', sizeof(sh_key_t));
538 if (immediate_exit_fast < 2)
539 safe_logger (mysignal, 0, NULL);
540 _exit(mysignal);
541#else
542
543 /* debug code
544 */
545 if (immediate_exit_fast == 1)
546 {
547 ++immediate_exit_fast;
548 if (skey != NULL)
549 memset (skey, '\0', sizeof(sh_key_t));
550#ifdef WITH_MESSAGE_QUEUE
551 close_ipc ();
552#endif
553 safe_logger (mysignal, 0, NULL);
554 chdir ("/");
555 raise(SIGFPE);
556 }
557 else if (immediate_exit_fast == 2)
558 {
559 chdir ("/");
560 raise(SIGFPE);
561 }
562 else if (immediate_exit_fast != 0)
563 {
564 _exit(mysignal);
565 }
566
567 ++immediate_exit_fast;
568
569 /* The FPE|BUS|SEGV|ILL signals leave the system in an undefined
570 * state, thus it is best to exit immediately.
571 */
572#ifdef SYS_SIGLIST_DECLARED
573 strncpy (sh_sig_msg, sys_siglist[mysignal], 40);
574#else
575 strncpy (sh_sig_msg, sh_unix_siglist(mysignal), 40);
576#endif
577
578 sl_stack_print();
579
580 /* Try to push out an error message.
581 */
582 sh_error_handle ((-1), FIL__, __LINE__, mysignal, MSG_EXIT_NORMAL,
583 sh.prg_name, sh_sig_msg);
584
585 if (skey != NULL)
586 memset (skey, '\0', sizeof(sh_key_t));
587#ifdef WITH_MESSAGE_QUEUE
588 close_ipc ();
589#endif
590
591 chdir ("/");
592 raise(SIGFPE);
593#endif
594}
595
596
597static
598void sh_unix_sigaction (int mysignal)
599{
600 ++sig_raised;
601#ifdef SIGUSR1
602 if (mysignal == SIGUSR1)
603 sig_debug_switch = 1;
604#endif
605#ifdef SIGUSR2
606 if (mysignal == SIGUSR2)
607 {
608 ++sig_suspend_switch;
609 ++sig_urgent;
610 }
611#endif
612#ifdef SIGHUP
613 if (mysignal == SIGHUP)
614 sig_config_read_again = 1;
615#endif
616#ifdef SIGTTOU
617 if (mysignal == SIGTTOU)
618 sig_force_check = 1;
619#endif
620#ifdef SIGABRT
621 if (mysignal == SIGABRT)
622 sig_fresh_trail = 1;
623#endif
624#ifdef SIGQUIT
625 if (mysignal == SIGQUIT)
626 {
627 sig_terminate = 1;
628 ++sig_urgent;
629 }
630#endif
631#ifdef SIGTERM
632 if (mysignal == SIGTERM)
633 {
634 strncpy (sh_sig_msg, _("Terminated"), 40);
635 sig_termfast = 1;
636 ++sig_urgent;
637 }
638#endif
639
640 return;
641}
642
643static
644void sh_unix_siginstall (int goDaemon)
645{
646 struct sigaction act, act_fast, act2, oldact, ignact;
647#if defined (SH_WITH_SERVER)
648 (void) goDaemon;
649#endif
650
651 SL_ENTER(_("sh_unix_siginstall"));
652
653 ignact.sa_handler = SIG_IGN; /* signal action */
654 sigemptyset( &ignact.sa_mask ); /* set an empty mask */
655 ignact.sa_flags = 0; /* init sa_flags */
656
657#if defined(SA_SIGACTION_WORKS)
658 act.sa_sigaction = &sh_unix_sigexit; /* signal action */
659#else
660 act.sa_handler = &sh_unix_sigexit; /* signal action */
661#endif
662
663 sigfillset ( &act.sa_mask ); /* set a full mask */
664
665
666 /* Block all but deadly signals.
667 */
668#ifdef SIGILL
669 sigdelset ( &act.sa_mask, SIGILL );
670#endif
671#ifndef SL_DEBUG
672#ifdef SIGFPE
673 sigdelset ( &act.sa_mask, SIGFPE );
674#endif
675#endif
676#ifdef SIGSEGV
677 sigdelset ( &act.sa_mask, SIGSEGV );
678#endif
679#ifdef SIGBUS
680 sigdelset ( &act.sa_mask, SIGBUS );
681#endif
682
683#if defined(SA_SIGACTION_WORKS)
684 act_fast.sa_sigaction = &sh_unix_sigexit_fast; /* signal action */
685#else
686 act_fast.sa_handler = &sh_unix_sigexit_fast; /* signal action */
687#endif
688
689 sigfillset ( &act_fast.sa_mask ); /* set a full mask */
690
691#ifdef SIGILL
692 sigdelset ( &act_fast.sa_mask, SIGILL );
693#endif
694#ifndef SL_DEBUG
695#ifdef SIGFPE
696 sigdelset ( &act_fast.sa_mask, SIGFPE );
697#endif
698#endif
699#ifdef SIGSEGV
700 sigdelset ( &act_fast.sa_mask, SIGSEGV );
701#endif
702#ifdef SIGBUS
703 sigdelset ( &act_fast.sa_mask, SIGBUS );
704#endif
705
706
707 /* Use siginfo to verify origin of signal, if possible.
708 */
709#if defined(SA_SIGACTION_WORKS)
710 act.sa_flags = SA_SIGINFO;
711 act_fast.sa_flags = SA_SIGINFO;
712#else
713 act.sa_flags = 0;
714 act_fast.sa_flags = 0;
715#endif
716
717 /* Do not block the signal from being received in its handler ...
718 * (is this a good or a bad idea ??).
719 */
720#if defined(SA_NOMASK)
721 act_fast.sa_flags |= SA_NOMASK;
722#elif defined(SA_NODEFER)
723 act_fast.sa_flags |= SA_NODEFER;
724#endif
725
726
727 act2.sa_handler = &sh_unix_sigaction; /* signal action */
728 sigemptyset( &act2.sa_mask ); /* set an empty mask */
729 act2.sa_flags = 0; /* init sa_flags */
730
731 /* signals to control the daemon */
732
733#ifdef SIGHUP
734 retry_sigaction(FIL__, __LINE__, SIGHUP, &act2, &oldact);
735#endif
736#ifdef SIGABRT
737 retry_sigaction(FIL__, __LINE__, SIGABRT, &act2, &oldact);
738#endif
739#ifdef SIGUSR1
740 retry_sigaction(FIL__, __LINE__, SIGUSR1, &act2, &oldact);
741#endif
742#ifdef SIGUSR2
743 retry_sigaction(FIL__, __LINE__, SIGUSR2, &act2, &oldact);
744#endif
745#ifdef SIGQUIT
746 retry_sigaction(FIL__, __LINE__, SIGQUIT, &act2, &oldact);
747#endif
748#ifdef SIGTERM
749 retry_sigaction(FIL__, __LINE__, SIGTERM, &act, &oldact);
750#endif
751
752 /* fatal signals that may cause termination */
753
754#ifdef SIGILL
755 retry_sigaction(FIL__, __LINE__, SIGILL, &act_fast, &oldact);
756#endif
757#ifndef SL_DEBUG
758#ifdef SIGFPE
759 retry_sigaction(FIL__, __LINE__, SIGFPE, &act_fast, &oldact);
760#endif
761#endif
762#ifdef SIGSEGV
763 retry_sigaction(FIL__, __LINE__, SIGSEGV, &act_fast, &oldact);
764#endif
765#ifdef SIGBUS
766 retry_sigaction(FIL__, __LINE__, SIGBUS, &act_fast, &oldact);
767#endif
768
769 /* other signals */
770
771#ifdef SIGINT
772 retry_sigaction(FIL__, __LINE__, SIGINT, &act, &oldact);
773#endif
774#ifdef SIGPIPE
775 retry_sigaction(FIL__, __LINE__, SIGPIPE, &act, &oldact);
776#endif
777#ifdef SIGALRM
778 retry_sigaction(FIL__, __LINE__, SIGALRM, &ignact, &oldact);
779#endif
780#ifdef SIGTSTP
781 retry_sigaction(FIL__, __LINE__, SIGTSTP, &ignact, &oldact);
782#endif
783#ifdef SIGTTIN
784 retry_sigaction(FIL__, __LINE__, SIGTTIN, &ignact, &oldact);
785#endif
786#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
787#ifdef SIGTTOU
788 if (goDaemon == 1)
789 retry_sigaction(FIL__, __LINE__, SIGTTOU, &act2, &oldact);
790 else
791 retry_sigaction(FIL__, __LINE__, SIGTTOU, &ignact, &oldact);
792#endif
793#else
794#ifdef SIGTTOU
795 retry_sigaction(FIL__, __LINE__, SIGTTOU, &ignact, &oldact);
796#endif
797#endif
798
799#ifdef SIGTRAP
800#if !defined(SCREW_IT_UP)
801 retry_sigaction(FIL__, __LINE__, SIGTRAP, &act, &oldact);
802#endif
803#endif
804
805#ifdef SIGPOLL
806 retry_sigaction(FIL__, __LINE__, SIGPOLL, &ignact, &oldact);
807#endif
808#if defined(SIGPROF) && !defined(SH_PROFILE)
809 retry_sigaction(FIL__, __LINE__, SIGPROF, &ignact, &oldact);
810#endif
811#ifdef SIGSYS
812 retry_sigaction(FIL__, __LINE__, SIGSYS, &act, &oldact);
813#endif
814#ifdef SIGURG
815 retry_sigaction(FIL__, __LINE__, SIGURG, &ignact, &oldact);
816#endif
817#if defined(SIGVTALRM) && !defined(SH_PROFILE)
818 retry_sigaction(FIL__, __LINE__, SIGVTALRM, &ignact, &oldact);
819#endif
820#ifdef SIGXCPU
821 retry_sigaction(FIL__, __LINE__, SIGXCPU, &act, &oldact);
822#endif
823#ifdef SIGXFSZ
824 retry_sigaction(FIL__, __LINE__, SIGXFSZ, &act, &oldact);
825#endif
826
827#ifdef SIGEMT
828 retry_sigaction(FIL__, __LINE__, SIGEMT, &ignact, &oldact);
829#endif
830#ifdef SIGSTKFLT
831 retry_sigaction(FIL__, __LINE__, SIGSTKFLT, &act, &oldact);
832#endif
833#ifdef SIGIO
834 retry_sigaction(FIL__, __LINE__, SIGIO, &ignact, &oldact);
835#endif
836#ifdef SIGPWR
837 retry_sigaction(FIL__, __LINE__, SIGPWR, &act, &oldact);
838#endif
839
840#ifdef SIGLOST
841 retry_sigaction(FIL__, __LINE__, SIGLOST, &ignact, &oldact);
842#endif
843#ifdef SIGUNUSED
844 retry_sigaction(FIL__, __LINE__, SIGUNUSED, &ignact, &oldact);
845#endif
846
847 SL_RET0(_("sh_unix_siginstall"));
848}
849
850/* ---------------------------------------------------------------- */
851
852/* checksum the own binary
853 */
854int sh_unix_self_hash (const char * c)
855{
856 char message[512];
857
858 SL_ENTER(_("sh_unix_self_hash"));
859
860 if (c == NULL)
861 {
862 sh.exec.path[0] = '\0';
863 SL_RETURN((0), _("sh_unix_self_hash"));
864 }
865 sl_strlcpy(sh.exec.path, c, SH_PATHBUF);
866
867 sl_strlcpy(sh.exec.hash,
868 sh_tiger_hash (c, TIGER_FILE, 0),
869 KEY_LEN+1);
870 sl_snprintf(message, 512, _("%s has checksum: %s"),
871 sh.exec.path, sh.exec.hash);
872 message[511] = '\0';
873 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
874 message, _("sh_unix_self_hash"));
875 if (0 == sl_strcmp(sh.exec.hash,
876 _("000000000000000000000000000000000000000000000000")
877 ))
878 {
879 dlog(1, FIL__, __LINE__,
880 _("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"),
881 sh.exec.path, sl_get_errmsg(), (int) sl_ret_euid());
882 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_NOACCESS,
883 (long) sh.real.uid, c);
884 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
885 }
886 SL_RETURN((0), _("sh_unix_self_hash"));
887}
888
889int sh_unix_self_check ()
890{
891 char newhash[KEY_LEN+1];
892 char message[512];
893
894 SL_ENTER(_("sh_unix_self_check"));
895 if (sh.exec.path == NULL || sh.exec.path[0] == '\0')
896 SL_RETURN((0), _("sh_unix_self_check"));
897
898 sl_strlcpy(newhash, sh_tiger_hash (sh.exec.path, TIGER_FILE, 0), KEY_LEN+1);
899 if (0 == sl_strncmp(sh.exec.hash,
900 newhash,
901 KEY_LEN))
902 SL_RETURN((0), _("sh_unix_self_check"));
903
904
905 dlog(1, FIL__, __LINE__,
906 _("The checksum of the executable: %s has changed since startup (%s -> %s).\n"),
907 sh.exec.path, sh.exec.hash, newhash);
908
909 sl_snprintf(message, 512,
910 _("The checksum of %s has changed since startup (%s -> %s)"),
911 sh.exec.path, sh.exec.hash, newhash);
912 message[511] = '\0';
913
914 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, 0, MSG_E_SUBGEN,
915 message, _("sh_unix_self_check"));
916 sh_error_handle ((-1), FIL__, __LINE__, EACCES, MSG_E_AUTH,
917 sh.exec.path);
918 SL_RETURN((-1), _("sh_unix_self_check"));
919}
920
921
922/* ---------------------------------------------------------------- */
923
924
925/* added Tue Feb 22 10:36:44 NFT 2000 Rainer Wichmann */
926static int tf_add_trusted_user_int(const char * c)
927{
928 register struct passwd * w;
929 int count;
930 uid_t pwid = (uid_t)-1;
931
932 SL_ENTER(_("tf_add_trusted_user_int"));
933
934 /* First check for a user name.
935 */
936 if ((w = sh_getpwnam(c)) != NULL && ((pwid = w->pw_uid) > 0))
937 goto succe;
938
939 /* Failed, so check for a numerical value.
940 */
941 pwid = strtol(c, (char **)NULL, 10);
942 if (pwid > 0 && pwid < 65535)
943 goto succe;
944
945 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
946 _("add trusted user"), c);
947 SL_RETURN((-1), _("tf_add_trusted_user_int"));
948
949 succe:
950 count = sl_trust_add_user(pwid);
951 SL_RETURN((count), _("tf_add_trusted_user_int"));
952}
953
954int tf_add_trusted_user(const char * c)
955{
956 int i;
957 char * q;
958 char * p = sh_util_strdup (c);
959
960 SL_ENTER(_("tf_add_trusted_user"));
961
962 q = strtok(p, ", \t");
963 if (!q)
964 {
965 SH_FREE(p);
966 SL_RETURN((-1), _("tf_add_trusted_user"));
967 }
968 while (q)
969 {
970 i = tf_add_trusted_user_int(q);
971 if (SL_ISERROR(i))
972 {
973 SH_FREE(p);
974 SL_RETURN((i), _("tf_add_trusted_user"));
975 }
976 q = strtok(NULL, ", \t");
977 }
978 SH_FREE(p);
979 SL_RETURN((0), _("tf_add_trusted_user"));
980}
981
982extern uid_t sl_trust_baduid();
983extern gid_t sl_trust_badgid();
984
985#if defined(HOST_IS_CYGWIN) || defined(__cygwin__) || defined(__CYGWIN32__) || defined(__CYGWIN__)
986int tf_trust_check (char * file, int mode)
987{
988 (void) file;
989 (void) mode;
990 return 0;
991}
992#else
993int tf_trust_check (char * file, int mode)
994{
995 char * tmp;
996 char * tmp2;
997 char * p;
998 int status;
999 int level;
1000 uid_t ff_euid;
1001
1002 SL_ENTER(_("tf_trust_check"));
1003
1004 if (mode == SL_YESPRIV)
1005 sl_get_euid(&ff_euid);
1006 else
1007 sl_get_ruid(&ff_euid);
1008
1009#if defined(SH_WITH_SERVER)
1010 if (0 == sl_ret_euid()) /* privileges not dropped yet */
1011 {
1012 struct passwd * tempres = sh_getpwnam(DEFAULT_IDENT);
1013
1014 if (!tempres)
1015 {
1016 dlog(1, FIL__, __LINE__,
1017 _("User %s does not exist. Please add the user to your system.\n"),
1018 DEFAULT_IDENT);
1019 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
1020 }
1021 ff_euid = tempres->pw_uid;
1022 }
1023#endif
1024
1025 status = sl_trustfile_euid(file, ff_euid);
1026
1027 if ( SL_ENONE != status)
1028 {
1029 if (status == SL_ESTAT)
1030 level = SH_ERR_ALL;
1031 else
1032 level = SH_ERR_ERR;
1033
1034 tmp = sh_util_safe_name (file);
1035 p = sl_trust_errfile();
1036 if (p && *p != '\0')
1037 {
1038 tmp2 = sh_util_safe_name (sl_trust_errfile());
1039 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST2,
1040 sl_error_string(status), tmp, tmp2);
1041 SH_FREE(tmp2);
1042 }
1043 else
1044 {
1045 sh_error_handle(level, FIL__, __LINE__, status, MSG_E_TRUST1,
1046 sl_error_string(status), tmp);
1047 }
1048 SH_FREE(tmp);
1049
1050 if (status == SL_EBADUID || status == SL_EBADGID ||
1051 status == SL_EBADOTH || status == SL_ETRUNC ||
1052 status == SL_EINTERNAL )
1053 {
1054 switch (status) {
1055 case SL_EINTERNAL:
1056 dlog(1, FIL__, __LINE__,
1057 _("An internal error occured in the trustfile function.\n"));
1058 break;
1059 case SL_ETRUNC:
1060 tmp = sh_util_safe_name (file);
1061 dlog(1, FIL__, __LINE__,
1062 _("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"),
1063 tmp);
1064 SH_FREE(tmp);
1065 break;
1066 case SL_EBADOTH:
1067 tmp = sh_util_safe_name (file);
1068 p = sl_trust_errfile();
1069 dlog(1, FIL__, __LINE__,
1070 _("The path element: %s\nin the filename: %s is world writeable.\n"),
1071 p, tmp);
1072 SH_FREE(tmp);
1073 break;
1074 case SL_EBADUID:
1075 tmp = sh_util_safe_name (file);
1076 p = sl_trust_errfile();
1077 dlog(1, FIL__, __LINE__,
1078 _("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"),
1079 (UID_CAST)sl_trust_baduid(), p, tmp);
1080 SH_FREE(tmp);
1081 break;
1082 case SL_EBADGID:
1083 tmp = sh_util_safe_name (file);
1084 p = sl_trust_errfile();
1085 dlog(1, FIL__, __LINE__,
1086 _("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"),
1087 p, tmp, (UID_CAST)sl_trust_badgid(),
1088 (UID_CAST)sl_trust_baduid());
1089 SH_FREE(tmp);
1090 break;
1091 default:
1092 break;
1093 }
1094
1095 SL_RETURN((-1), _("tf_trust_check"));
1096 }
1097 }
1098
1099 SL_RETURN((0), _("tf_trust_check"));
1100}
1101#endif
1102
1103#ifdef HAVE_INITGROUPS
1104#ifdef HOST_IS_OSF
1105int sh_unix_initgroups ( char * in_user, gid_t in_gid)
1106#else
1107int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1108#endif
1109{
1110 int status = -1;
1111 status = sh_initgroups (in_user, in_gid);
1112 if (status < 0)
1113 {
1114 if (errno == EPERM)
1115 return 0;
1116 if (errno == EINVAL)
1117 return 0;
1118 return -1;
1119 }
1120 return 0;
1121}
1122#else
1123int sh_unix_initgroups (const char * in_user, gid_t in_gid)
1124{
1125 (void) in_user;
1126 (void) in_gid;
1127 return 0;
1128}
1129#endif
1130
1131#ifdef HAVE_INITGROUPS
1132char * sh_unix_getUIDname (int level, uid_t uid);
1133int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1134{
1135 int status = -1;
1136 char * user = NULL;
1137
1138 SL_ENTER(_("sh_unix_initgroups2"));
1139
1140 user = sh_unix_getUIDname (SH_ERR_ERR, in_pid);
1141 if (user == NULL)
1142 SL_RETURN((-1), _("sh_unix_initgroups2"));
1143 status = sh_initgroups (user, in_gid);
1144 if (status < 0)
1145 {
1146 if (errno == EPERM)
1147 status = 0;
1148 if (errno == EINVAL)
1149 status = 0;
1150 }
1151 SL_RETURN((status), _("sh_unix_initgroups2"));
1152}
1153#else
1154int sh_unix_initgroups2 (uid_t in_pid, gid_t in_gid)
1155{
1156 (void) in_pid;
1157 (void) in_gid;
1158 return 0;
1159}
1160#endif
1161
1162void sh_unix_closeall (int fd, int except)
1163{
1164 int fdx = fd;
1165#ifdef _SC_OPEN_MAX
1166 int fdlimit = sysconf (_SC_OPEN_MAX);
1167#else
1168#ifdef OPEN_MAX
1169 int fdlimit = OPEN_MAX;
1170#else
1171 int fdlimit = _POSIX_OPEN_MAX;
1172#endif
1173#endif
1174
1175 SL_ENTER(_("sh_unix_closeall"));
1176
1177 /* can't happen - so fix it :-(
1178 */
1179 if (fdlimit < 0)
1180 fdlimit = 8; /* POSIX lower limit */
1181
1182 if (fdlimit > 65536)
1183 fdlimit = 65536;
1184
1185 /* Close everything from fd (inclusive) up to fdlimit (exclusive).
1186 */
1187 while (fd < fdlimit)
1188 {
1189 if (fd == except)
1190 fd++;
1191 else if (slib_do_trace != 0 && fd == slib_trace_fd)
1192 fd++;
1193 else
1194 close(fd++);
1195 }
1196
1197 sl_dropall (fdx, except);
1198
1199 SL_RET0(_("sh_unix_closeall"));
1200}
1201
1202static void sh_unix_setlimits(void)
1203{
1204 struct rlimit limits;
1205
1206 SL_ENTER(_("sh_unix_setlimits"));
1207
1208 limits.rlim_cur = RLIM_INFINITY;
1209 limits.rlim_max = RLIM_INFINITY;
1210
1211#ifdef RLIMIT_CPU
1212 setrlimit (RLIMIT_CPU, &limits);
1213#endif
1214#ifdef RLIMIT_FSIZE
1215 setrlimit (RLIMIT_FSIZE, &limits);
1216#endif
1217#ifdef RLIMIT_DATA
1218 setrlimit (RLIMIT_DATA, &limits);
1219#endif
1220#ifdef RLIMIT_STACK
1221 setrlimit (RLIMIT_STACK, &limits);
1222#endif
1223#ifdef RLIMIT_RSS
1224 setrlimit (RLIMIT_RSS, &limits);
1225#endif
1226#ifdef RLIMIT_NPROC
1227 setrlimit (RLIMIT_NPROC, &limits);
1228#endif
1229#ifdef RLIMIT_MEMLOCK
1230 setrlimit (RLIMIT_MEMLOCK, &limits);
1231#endif
1232
1233#if !defined(SL_DEBUG)
1234 /* no core dumps
1235 */
1236 limits.rlim_cur = 0;
1237 limits.rlim_max = 0;
1238#ifdef RLIMIT_CORE
1239 setrlimit (RLIMIT_CORE, &limits);
1240#endif
1241#else
1242#ifdef RLIMIT_CORE
1243 setrlimit (RLIMIT_CORE, &limits);
1244#endif
1245#endif
1246
1247 limits.rlim_cur = 1024;
1248 limits.rlim_max = 1024;
1249
1250#if defined(RLIMIT_NOFILE)
1251 setrlimit (RLIMIT_NOFILE, &limits);
1252#elif defined(RLIMIT_OFILE)
1253 setrlimit (RLIMIT_OFILE, &limits);
1254#endif
1255
1256 SL_RET0(_("sh_unix_setlimits"));
1257}
1258
1259static void sh_unix_copyenv(void)
1260{
1261 char ** env0 = environ;
1262 char ** env1;
1263 int envlen = 0;
1264 size_t len;
1265
1266 SL_ENTER(_("sh_unix_copyenv"));
1267
1268 while (env0 != NULL && env0[envlen] != NULL) {
1269 /* printf("%2d: %s\n", envlen, env0[envlen]); */
1270 ++envlen;
1271 }
1272 ++envlen;
1273
1274 /* printf("-> %2d: slots allocated\n", envlen); */
1275 env1 = malloc (sizeof(char *) * envlen); /* only once */
1276 if (env1 == NULL)
1277 {
1278 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1279 SL_RET0(_("sh_unix_copyenv"));
1280 }
1281 env0 = environ;
1282 envlen = 0;
1283
1284 while (env0 != NULL && env0[envlen] != NULL) {
1285 len = strlen(env0[envlen]) + 1;
1286 env1[envlen] = malloc (len); /* only once */
1287 if (env1[envlen] == NULL)
1288 {
1289 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1290 SL_RET0(_("sh_unix_copyenv"));
1291 }
1292 sl_strlcpy(env1[envlen], env0[envlen], len);
1293 ++envlen;
1294 }
1295 env1[envlen] = NULL;
1296
1297 environ = env1;
1298 SL_RET0(_("sh_unix_copyenv"));
1299}
1300
1301/* delete all environment variables
1302 */
1303static void sh_unix_zeroenv(void)
1304{
1305 char * c;
1306 char ** env;
1307
1308 SL_ENTER(_("sh_unix_zeroenv"));
1309
1310 sh_unix_copyenv();
1311 env = environ;
1312
1313 while (env != NULL && *env != NULL) {
1314 c = strchr ((*env), '=');
1315#ifdef WITH_MYSQL
1316 /*
1317 * Skip the MYSQL_UNIX_PORT environment variable; MySQL may need it.
1318 */
1319 if (0 == sl_strncmp((*env), _("MYSQL_UNIX_PORT="), 16))
1320 {
1321 ++(env);
1322 continue;
1323 }
1324 if (0 == sl_strncmp((*env), _("MYSQL_TCP_PORT="), 15))
1325 {
1326 ++(env);
1327 continue;
1328 }
1329 if (0 == sl_strncmp((*env), _("MYSQL_HOME="), 11))
1330 {
1331 ++(env);
1332 continue;
1333 }
1334#endif
1335#ifdef WITH_ORACLE
1336 /*
1337 * Skip the ORACLE_HOME environment variable; Oracle may need it.
1338 */
1339 if (0 == sl_strncmp((*env), _("ORACLE_HOME="), 12))
1340 {
1341 ++(env);
1342 continue;
1343 }
1344#endif
1345 /*
1346 * Skip the TZ environment variable.
1347 */
1348 if (0 == sl_strncmp((*env), _("TZ="), 3))
1349 {
1350 ++(env);
1351 continue;
1352 }
1353 ++(env);
1354 if (c != NULL)
1355 {
1356 ++c;
1357 while ((*c) != '\0') {
1358 (*c) = '\0';
1359 ++c;
1360 }
1361 }
1362 }
1363
1364 SL_RET0(_("sh_unix_zeroenv"));
1365}
1366
1367
1368static void sh_unix_resettimer(void)
1369{
1370 struct itimerval this_timer;
1371
1372 SL_ENTER(_("sh_unix_resettimer"));
1373
1374 this_timer.it_value.tv_sec = 0;
1375 this_timer.it_value.tv_usec = 0;
1376
1377 this_timer.it_interval.tv_sec = 0;
1378 this_timer.it_interval.tv_usec = 0;
1379
1380 setitimer(ITIMER_REAL, &this_timer, NULL);
1381#if !defined(SH_PROFILE)
1382 setitimer(ITIMER_VIRTUAL, &this_timer, NULL);
1383 setitimer(ITIMER_PROF, &this_timer, NULL);
1384#endif
1385
1386 SL_RET0(_("sh_unix_resettimer"));
1387}
1388
1389static void sh_unix_resetsignals(void)
1390{
1391 int sig_num;
1392#ifdef NSIG
1393 int max_sig = NSIG;
1394#else
1395 int max_sig = 255;
1396#endif
1397 int test;
1398 struct sigaction act, oldact;
1399 int status;
1400
1401 sigset_t set_proc;
1402
1403 SL_ENTER(_("sh_unix_resetsignals"));
1404 /*
1405 * Reset the current signal mask (inherited from parent process).
1406 */
1407
1408 sigfillset(&set_proc);
1409
1410 do {
1411 errno = 0;
1412 test = sigprocmask(SIG_UNBLOCK, &set_proc, NULL);
1413 } while (test < 0 && errno == EINTR);
1414
1415 /*
1416 * Reset signal handling.
1417 */
1418
1419 act.sa_handler = SIG_DFL; /* signal action */
1420 sigemptyset( &act.sa_mask ); /* set an empty mask */
1421 act.sa_flags = 0; /* init sa_flags */
1422
1423 for (sig_num = 1; sig_num <= max_sig; ++sig_num)
1424 {
1425#if !defined(SH_PROFILE)
1426 test = retry_sigaction(FIL__, __LINE__, sig_num, &act, &oldact);
1427#else
1428 test = 0;
1429#endif
1430 if ((test == -1) && (errno != EINVAL))
1431 {
1432 status = errno;
1433 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_SIG,
1434 sh_error_message (status), sig_num);
1435 }
1436 }
1437
1438 SL_RET0(_("sh_unix_resetsignals"));
1439}
1440
1441/* Get the local hostname (FQDN)
1442 */
1443#include <sys/socket.h>
1444
1445/* Required for BSD
1446 */
1447#ifdef HAVE_NETINET_IN_H
1448#include <netinet/in.h>
1449#endif
1450
1451#include <arpa/inet.h>
1452
1453char * sh_unix_h_name (struct hostent * host_entry)
1454{
1455 char ** p;
1456 if (strchr(host_entry->h_name, '.')) {
1457 return host_entry->h_name;
1458 } else {
1459 for (p = host_entry->h_aliases; *p; ++p) {
1460 if (strchr(*p, '.'))
1461 return *p;
1462 }
1463 }
1464 return host_entry->h_name;
1465}
1466
1467/* uname() on FreeBSD is broken, because the 'nodename' buf is too small
1468 * to hold a valid (leftmost) domain label.
1469 */
1470#if defined(HAVE_UNAME) && !defined(HOST_IS_FREEBSD)
1471#include <sys/utsname.h>
1472void sh_unix_localhost()
1473{
1474 struct utsname buf;
1475 struct hostent * he1;
1476 int i;
1477 int ddot = 0;
1478 int len;
1479 char * p;
1480 char hostname[256];
1481
1482
1483 SL_ENTER(_("sh_unix_localhost"));
1484
1485 (void) uname (&buf);
1486 /* flawfinder: ignore */ /* ff bug, ff sees system() */
1487 sl_strlcpy (sh.host.system, buf.sysname, SH_MINIBUF);
1488 sl_strlcpy (sh.host.release, buf.release, SH_MINIBUF);
1489 sl_strlcpy (sh.host.machine, buf.machine, SH_MINIBUF);
1490
1491 /* Workaround for cases where nodename could be
1492 * a truncated FQDN.
1493 */
1494 if (strlen(buf.nodename) == (sizeof(buf.nodename)-1))
1495 {
1496 p = strchr(buf.nodename, '.');
1497 if (NULL != p) {
1498 *p = '\0';
1499 sl_strlcpy(hostname, buf.nodename, 256);
1500 } else {
1501#ifdef HAVE_GETHOSTNAME
1502 if (0 != gethostname(hostname, 256))
1503 {
1504 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1505 _("nodename returned by uname may be truncated"),
1506 _("sh_unix_localhost"));
1507 sl_strlcpy (hostname, buf.nodename, 256);
1508 }
1509 else
1510 {
1511 hostname[255] = '\0';
1512 }
1513#else
1514 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
1515 _("nodename returned by uname may be truncated"),
1516 _("sh_unix_localhost"));
1517 sl_strlcpy(hostname, buf.nodename, 256);
1518#endif
1519 }
1520 }
1521 else
1522 {
1523 sl_strlcpy(hostname, buf.nodename, 256);
1524 }
1525
1526 he1 = sh_gethostbyname(hostname);
1527
1528 if (he1 == NULL)
1529 {
1530 dlog(1, FIL__, __LINE__,
1531 _("According to uname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN. For more information, see the entry about self-resolving under 'Most frequently' in the FAQ that you will find in the docs/ subdirectory.\n"),
1532 hostname);
1533 sl_strlcpy (sh.host.name, hostname, SH_PATHBUF);
1534 }
1535 else
1536 {
1537 sl_strlcpy (sh.host.name, sh_unix_h_name(he1), SH_PATHBUF);
1538 }
1539
1540
1541 /* check whether it looks like a FQDN
1542 */
1543 len = sl_strlen(sh.host.name);
1544 for (i = 0; i < len; ++i)
1545 if (sh.host.name[i] == '.') ++ddot;
1546
1547 if (ddot == 0 && he1 != NULL)
1548 {
1549 dlog(1, FIL__, __LINE__,
1550 _("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"),
1551 hostname, sh.host.name);
1552 sl_strlcpy (sh.host.name,
1553 inet_ntoa (*(struct in_addr *) he1->h_addr),
1554 SH_PATHBUF);
1555 SL_RET0(_("sh_unix_localhost"));
1556 }
1557
1558 if (is_numeric(sh.host.name))
1559 {
1560 dlog(1, FIL__, __LINE__,
1561 _("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"),
1562 hostname, sh.host.name);
1563 }
1564
1565 SL_RET0(_("sh_unix_localhost"));
1566}
1567#else
1568void sh_unix_localhost()
1569{
1570 struct hostent * he1;
1571 int i;
1572 int ddot = 0;
1573 int len;
1574 char hostname[1024];
1575
1576
1577 SL_ENTER(_("sh_unix_localhost"));
1578
1579 (void) gethostname (hostname, 1024);
1580 hostname[1023] = '\0';
1581 he1 = sh_gethostbyname(hostname);
1582
1583 if (he1 != NULL)
1584 {
1585 sl_strlcpy (sh.host.name, sh_unix_h_name(he1), SH_PATHBUF);
1586 }
1587 else
1588 {
1589 dlog(1, FIL__, __LINE__,
1590 _("According to gethostname, your nodename is %s, but your resolver\nlibrary cannot resolve this nodename to a FQDN.\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"),
1591 hostname);
1592 sl_strlcpy (sh.host.name, _("localhost"), SH_PATHBUF);
1593 SL_RET0(_("sh_unix_localhost"));
1594 }
1595
1596 /* check whether it looks like a FQDN
1597 */
1598 len = sl_strlen(sh.host.name);
1599 for (i = 0; i < len; ++i)
1600 if (sh.host.name[i] == '.') ++ddot;
1601 if (ddot == 0)
1602 {
1603 dlog(1, FIL__, __LINE__,
1604 _("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"),
1605 hostname, sh.host.name);
1606 sl_strlcpy (sh.host.name,
1607 inet_ntoa (*(struct in_addr *) he1->h_addr),
1608 SH_PATHBUF);
1609 SL_RET0(_("sh_unix_localhost"));
1610 }
1611
1612 if (is_numeric(sh.host.name))
1613 {
1614 dlog(1, FIL__, __LINE__,
1615 _("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"),
1616 hostname, sh.host.name);
1617 }
1618
1619 SL_RET0(_("sh_unix_localhost"));
1620}
1621#endif
1622
1623
1624void sh_unix_memlock()
1625{
1626 SL_ENTER(_("sh_unix_memlock"));
1627
1628 /* do this before dropping privileges
1629 */
1630#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
1631 if (skey->mlock_failed == SL_FALSE)
1632 {
1633 if ( (-1) == sh_unix_mlock( FIL__, __LINE__,
1634 (char *) skey, sizeof (sh_key_t)) )
1635 {
1636 skey->mlock_failed = SL_TRUE;
1637 }
1638 }
1639#else
1640 if (skey->mlock_failed == SL_FALSE)
1641 {
1642 skey->mlock_failed = SL_TRUE;
1643 }
1644#endif
1645
1646 SL_RET0(_("sh_unix_memlock"));
1647}
1648
1649#ifdef SH_WITH_SERVER
1650char * chroot_dir = NULL;
1651
1652int sh_unix_set_chroot(const char * str)
1653{
1654 size_t len;
1655 static int block = 0;
1656
1657 if (block == 1)
1658 return 0;
1659
1660 if (str && *str == '/')
1661 {
1662 len = strlen(str) + 1;
1663 chroot_dir = malloc(strlen(str) + 1); /* only once */
1664 if (!chroot_dir)
1665 {
1666 fprintf(stderr, _("%s: %d: Out of memory\n"), FIL__, __LINE__);
1667 return 1;
1668 }
1669 sl_strlcpy(chroot_dir, str, len);
1670 block = 1;
1671 return 0;
1672 }
1673 return 1;
1674}
1675
1676int sh_unix_chroot()
1677{
1678 int status;
1679
1680 if (chroot_dir != NULL)
1681 {
1682 status = retry_aud_chdir(FIL__, __LINE__, chroot_dir);
1683 if ( (-1) == status )
1684 {
1685 status = errno;
1686 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
1687 sh_error_message (status), chroot_dir);
1688 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1689 }
1690 /* flawfinder: ignore */
1691 return (chroot(chroot_dir));
1692 }
1693 return 0;
1694}
1695/* #ifdef SH_WITH_SERVER */
1696#else
1697int sh_unix_chroot() { return 0; }
1698#endif
1699
1700/* daemon mode
1701 */
1702static int block_setdeamon = 0;
1703
1704int sh_unix_setdeamon(const char * dummy)
1705{
1706 int res = 0;
1707
1708 SL_ENTER(_("sh_unix_setdeamon"));
1709
1710 if (block_setdeamon != 0)
1711 SL_RETURN((0),_("sh_unix_setdeamon"));
1712
1713 if (dummy == NULL)
1714 sh.flag.isdaemon = ON;
1715 else
1716 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
1717
1718 if (sh.flag.opts == S_TRUE)
1719 block_setdeamon = 1;
1720
1721 SL_RETURN(res, _("sh_unix_setdeamon"));
1722}
1723#if defined(HAVE_LIBPRELUDE)
1724#include "sh_prelude.h"
1725#endif
1726
1727int sh_unix_setnodeamon(const char * dummy)
1728{
1729 int res = 0;
1730
1731 SL_ENTER(_("sh_unix_setnodeamon"));
1732
1733 if (block_setdeamon != 0)
1734 SL_RETURN((0),_("sh_unix_setmodeamon"));
1735
1736 if (dummy == NULL)
1737 sh.flag.isdaemon = OFF;
1738 else
1739 res = sh_util_flagval (dummy, &sh.flag.isdaemon);
1740
1741 if (sh.flag.opts == S_TRUE)
1742 block_setdeamon = 1;
1743
1744 SL_RETURN(res, _("sh_unix_setnodeamon"));
1745}
1746
1747int sh_unix_init(int goDaemon)
1748{
1749 int status;
1750 uid_t uid;
1751 pid_t oldpid = getpid();
1752#if defined(SH_WITH_SERVER)
1753 extern int sh_socket_open_int ();
1754#endif
1755
1756 SL_ENTER(_("sh_unix_init"));
1757
1758 /* fork twice, exit the parent process
1759 */
1760 if (goDaemon == 1) {
1761
1762 switch (aud_fork(FIL__, __LINE__)) {
1763 case 0: break; /* child process continues */
1764 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
1765 default: aud__exit(FIL__, __LINE__, 0); /* parent process exits */
1766 }
1767
1768 /* Child processes do not inherit page locks across a fork.
1769 * Error in next fork would return in this (?) thread of execution.
1770 */
1771 sh_unix_memlock();
1772
1773 setsid(); /* should not fail */
1774
1775 switch (aud_fork(FIL__, __LINE__)) {
1776 case 0: break; /* child process continues */
1777 case -1: SL_RETURN((-1),_("sh_unix_init")); /* error */
1778 default: aud__exit(FIL__, __LINE__, 0); /* parent process exits */
1779 }
1780
1781 /* Child processes do not inherit page locks across a fork.
1782 */
1783 sh_unix_memlock();
1784
1785 } else {
1786 setsid(); /* should not fail */
1787 }
1788
1789 /* set working directory
1790 */
1791#ifdef SH_PROFILE
1792 status = 0;
1793#else
1794 status = retry_aud_chdir(FIL__, __LINE__, "/");
1795#endif
1796 if ( (-1) == status )
1797 {
1798 status = errno;
1799 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_W_CHDIR,
1800 sh_error_message (status), "/");
1801 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1802 }
1803
1804 /* reset timers
1805 */
1806 sh_unix_resettimer();
1807
1808 /* signal handlers
1809 */
1810 sh_unix_resetsignals();
1811#if defined(SCREW_IT_UP)
1812 sh_sigtrap_prepare();
1813#endif
1814 sh_unix_siginstall (goDaemon);
1815
1816 /* set file creation mask
1817 */
1818 (void) umask (0); /* should not fail */
1819
1820 /* set resource limits to maximum, and
1821 * core dump size to zero
1822 */
1823 sh_unix_setlimits();
1824
1825 /* zero out the environment (like PATH='\0')
1826 */
1827 sh_unix_zeroenv();
1828
1829
1830 /* close all file descriptors, and
1831 * open first three streams to /dev/null
1832 */
1833 if (goDaemon == 1)
1834 {
1835 sh_unix_closeall (0, -1); /* if running as daemon */
1836 aud_open(FIL__, __LINE__, SL_NOPRIV, _("/dev/null"), O_RDWR, 0);
1837 retry_aud_dup(FIL__, __LINE__, 0);
1838 retry_aud_dup(FIL__, __LINE__, 0);
1839#if defined(HAVE_LIBPRELUDE)
1840 sh_prelude_reset ();
1841#endif
1842
1843 /* --- wait until parent has exited ---
1844 */
1845 while (1 == 1)
1846 {
1847 errno = 0;
1848 if (0 > aud_kill (FIL__, __LINE__, oldpid, 0) && errno == ESRCH)
1849 {
1850 break;
1851 }
1852 retry_msleep(0, 1);
1853 }
1854
1855 /* write PID file
1856 */
1857 status = sh_unix_write_pid_file();
1858 if (status < 0)
1859 {
1860 sl_get_euid(&uid);
1861 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_PIDFILE,
1862 (long) uid, sh.srvlog.alt);
1863 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1864 }
1865#if defined(SH_WITH_SERVER)
1866 sh_socket_open_int ();
1867#endif
1868 }
1869 else
1870 {
1871 sh_unix_closeall(3, -1); /* if not daemon */
1872#if defined(HAVE_LIBPRELUDE)
1873 sh_prelude_reset ();
1874#endif
1875#if defined(SH_WITH_SERVER)
1876 sh_socket_open_int ();
1877#endif
1878 }
1879
1880 /* chroot (this is a no-op if no chroot dir is specified
1881 */
1882 status = sh_unix_chroot();
1883 if (status < 0)
1884 {
1885 status = errno;
1886 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
1887 sh_error_message(status), _("chroot"));
1888 aud_exit(FIL__, __LINE__, EXIT_FAILURE);
1889 }
1890
1891 /* drop capabilities
1892 */
1893 sl_drop_cap();
1894
1895 SL_RETURN((0),_("sh_unix_init"));
1896}
1897
1898/********************************************************
1899 *
1900 * TIME
1901 *
1902 ********************************************************/
1903
1904/* Figure out the time offset of the current timezone
1905 * in a portable way.
1906 */
1907char * t_zone(const time_t * xx)
1908{
1909 struct tm aa;
1910 struct tm bb;
1911 struct tm * cc;
1912 int sign = 0;
1913 int diff = 0;
1914 int hh, mm;
1915 static char tz[64];
1916
1917 SL_ENTER(_("t_zone"));
1918
1919
1920 cc = gmtime (xx);
1921 memcpy (&aa, cc, sizeof(struct tm));
1922 cc = localtime (xx);
1923 memcpy (&bb, cc, sizeof(struct tm));
1924
1925 /* Check for datum wrap-around.
1926 */
1927 if (aa.tm_year < bb.tm_year)
1928 sign = (-1);
1929 else if (aa.tm_mon < bb.tm_mon)
1930 sign = (-1);
1931 else if (aa.tm_mday < bb.tm_mday)
1932 sign = (-1);
1933 else if (bb.tm_year < aa.tm_year)
1934 sign = ( 1);
1935 else if (bb.tm_mon < aa.tm_mon)
1936 sign = ( 1);
1937 else if (bb.tm_mday < aa.tm_mday)
1938 sign = ( 1);
1939
1940 diff = aa.tm_hour * 60 + aa.tm_min;
1941 diff = (bb.tm_hour * 60 + bb.tm_min) - diff;
1942 diff = diff - (sign * 24 * 60); /* datum wrap-around correction */
1943 hh = diff / 60;
1944 mm = diff - (hh * 60);
1945 sprintf (tz, _("%+03d%02d"), hh, mm); /* known to fit */
1946
1947 SL_RETURN(tz, _("t_zone"));
1948}
1949
1950unsigned long sh_unix_longtime ()
1951{
1952 return ((unsigned long)time(NULL));
1953}
1954
1955#ifdef HAVE_GETTIMEOFDAY
1956unsigned long sh_unix_notime ()
1957{
1958 struct timeval tv;
1959
1960 gettimeofday (&tv, NULL);
1961
1962 return ((unsigned long)(tv.tv_sec + tv.tv_usec * 10835 + getpid() + getppid()));
1963
1964}
1965#endif
1966
1967static int count_dev_time = 0;
1968
1969void reset_count_dev_time(void)
1970{
1971 count_dev_time = 0;
1972 return;
1973}
1974
1975int sh_unix_settimeserver (const char * address)
1976{
1977
1978 SL_ENTER(_("sh_unix_settimeserver"));
1979
1980 if (address != NULL && count_dev_time < 2
1981 && sl_strlen(address) < SH_PATHBUF)
1982 {
1983 if (count_dev_time == 0)
1984 sl_strlcpy (sh.srvtime.name, address, SH_PATHBUF);
1985 else
1986 sl_strlcpy (sh.srvtime.alt, address, SH_PATHBUF);
1987
1988 ++count_dev_time;
1989 SL_RETURN((0), _("sh_unix_settimeserver"));
1990 }
1991 SL_RETURN((-1), _("sh_unix_settimeserver"));
1992}
1993
1994
1995#ifdef HAVE_NTIME
1996#define UNIXEPOCH 2208988800UL /* difference between Unix time and net time
1997 * The UNIX EPOCH starts in 1970.
1998 */
1999#include <sys/socket.h>
2000#include <netinet/in.h>
2001#include <arpa/inet.h>
2002#include <netdb.h>
2003#include <ctype.h>
2004#endif
2005
2006/* Timeserver service. */
2007/* define is missing on HP-UX 10.20 */
2008#ifndef IPPORT_TIMESERVER
2009#define IPPORT_TIMESERVER 37
2010#endif
2011
2012char * sh_unix_time (time_t thetime)
2013{
2014
2015 int status;
2016
2017 time_t time_now;
2018 struct tm * time_ptr;
2019 static char AsciiTime[81]; /* local time */
2020 static char RetTime[81]; /* local time */
2021#ifdef SH_USE_XML
2022 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2023#else
2024 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2025#endif
2026
2027#ifdef HAVE_NTIME
2028 int fd; /* network file descriptor */
2029 u_char net_time[4]; /* remote time in network format */
2030 static int failerr = 0; /* no net time */
2031 int fail = 0; /* no net time */
2032 int errflag;
2033 char errmsg[256];
2034 char error_call[SH_MINIBUF];
2035 int error_num;
2036#endif
2037
2038 SL_ENTER(_("sh_unix_time"));
2039
2040#ifdef HAVE_NTIME
2041 if (thetime == 0)
2042 {
2043 if (sh.srvtime.name[0] == '\0')
2044 {
2045 fail = 1;
2046 (void) time (&time_now);
2047 }
2048 else /* have a timeserver address */
2049 {
2050 fd = connect_port_2 (sh.srvtime.name, sh.srvtime.alt,
2051 IPPORT_TIMESERVER,
2052 error_call, &error_num, errmsg, sizeof(errmsg));
2053 if (fd >= 0)
2054 {
2055 if (4 != read_port (fd, (char *) net_time, 4, &errflag, 2))
2056 {
2057 fail = 1;
2058 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2059 MSG_E_NLOST,
2060 _("time"), sh.srvtime.name);
2061 }
2062 close(fd);
2063 }
2064 else
2065 {
2066 sh_error_handle ((-1), FIL__, __LINE__, error_num,
2067 MSG_E_NET, errmsg, error_call,
2068 _("time"), sh.srvtime.name);
2069 fail = 1;
2070 }
2071
2072 if (fail == 0)
2073 {
2074 time_now = ntohl(* (long *) net_time) - UNIXEPOCH;
2075 /* fprintf(stderr, "TIME IS %ld\n", time_now); */
2076 if (failerr == 1) {
2077 failerr = 0;
2078 sh_error_handle ((-1), FIL__, __LINE__, 0,
2079 MSG_E_NEST,
2080 _("time"), sh.srvtime.name);
2081 }
2082 }
2083 else
2084 {
2085 (void) time (&time_now);
2086 if (failerr == 0)
2087 {
2088 failerr = 1;
2089 sh_error_handle ((-1), FIL__, __LINE__, errflag,
2090 MSG_SRV_FAIL,
2091 _("time"), sh.srvtime.name);
2092 }
2093 }
2094 }
2095 }
2096 else
2097 {
2098 time_now = thetime;
2099 }
2100
2101 /* #ifdef HAVE_NTIME */
2102#else
2103
2104 if (thetime == 0)
2105 {
2106 (void) time (&time_now);
2107 }
2108 else
2109 {
2110 time_now = thetime;
2111 }
2112
2113 /* #ifdef HAVE_NTIME */
2114#endif
2115
2116 if (time_now == (-1) )
2117 SL_RETURN( _(deftime), _("sh_unix_time"));
2118 else
2119 time_ptr = localtime (&time_now);
2120
2121 if (time_ptr != NULL)
2122 {
2123 status = strftime (AsciiTime, 80,
2124#ifdef SH_USE_XML
2125 _("%Y-%m-%dT%H:%M:%S%%s"),
2126#else
2127 _("[%Y-%m-%dT%H:%M:%S%%s]"),
2128#endif
2129 time_ptr);
2130
2131 sl_snprintf(RetTime, 80, AsciiTime, t_zone(&time_now));
2132
2133 if ( (status == 0) || (status == 80) )
2134 SL_RETURN( _(deftime), _("sh_unix_time"));
2135 else
2136 SL_RETURN( &RetTime[0], _("sh_unix_time"));
2137 }
2138
2139 /* last resort
2140 */
2141 SL_RETURN( _(deftime), _("sh_unix_time"));
2142}
2143
2144static int sh_unix_use_localtime = S_FALSE;
2145
2146/* whether to use localtime for file timesatams in logs
2147 */
2148int sh_unix_uselocaltime (const char * c)
2149{
2150 int i;
2151 SL_ENTER(_("sh_unix_uselocaltime"));
2152 i = sh_util_flagval(c, &(sh_unix_use_localtime));
2153
2154 SL_RETURN(i, _("sh_unix_uselocaltime"));
2155}
2156
2157char * sh_unix_gmttime (time_t thetime)
2158{
2159
2160 int status;
2161
2162 struct tm * time_ptr;
2163 static char AsciiTime[81]; /* GMT time */
2164#ifdef SH_USE_XML
2165 static char deftime[] = N_("0000-00-00T00:00:00"); /* default time */
2166#else
2167 static char deftime[] = N_("[0000-00-00T00:00:00]"); /* default time */
2168#endif
2169
2170 SL_ENTER(_("sh_unix_gmttime"));
2171
2172 if (sh_unix_use_localtime == S_FALSE)
2173 time_ptr = gmtime (&thetime);
2174 else
2175 time_ptr = localtime (&thetime);
2176
2177 if (time_ptr != NULL)
2178 {
2179 status = strftime (AsciiTime, 80,
2180#ifdef SH_USE_XML
2181 _("%Y-%m-%dT%H:%M:%S"),
2182#else
2183 _("[%Y-%m-%dT%H:%M:%S]"),
2184#endif
2185 time_ptr);
2186
2187 if ( (status == 0) || (status == 80) )
2188 SL_RETURN( _(deftime), _("sh_unix_gmttime"));
2189 else
2190 SL_RETURN( &AsciiTime[0], _("sh_unix_gmttime"));
2191 }
2192
2193 /* last resort
2194 */
2195 SL_RETURN( _(deftime), _("sh_unix_gmttime"));
2196}
2197
2198
2199
2200char * sh_unix_getUIDdir (int level, uid_t uid)
2201{
2202 struct passwd * tempres;
2203 int status = 0;
2204
2205 SL_ENTER(_("sh_unix_getUIDdir"));
2206
2207 errno = 0;
2208 tempres = sh_getpwuid(uid);
2209 status = errno;
2210
2211 if (tempres == NULL) {
2212 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2213 sh_error_message(status),
2214 _("getpwuid"), (long) uid, _("completely missing"));
2215 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2216 }
2217
2218 if (tempres->pw_dir != NULL) {
2219 SL_RETURN( tempres->pw_dir, _("sh_unix_getUIDdir"));
2220 } else {
2221 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2222 sh_error_message(status),
2223 _("getpwuid"), (long) uid, _("pw_dir"));
2224 SL_RETURN( NULL, _("sh_unix_getUIDdir"));
2225 }
2226}
2227
2228char * sh_unix_getUIDname (int level, uid_t uid)
2229{
2230 struct passwd * tempres;
2231 int status = 0;
2232 static uid_t old_uid;
2233 static char name[32] = { '\0' };
2234
2235 SL_ENTER(_("sh_unix_getUIDname"));
2236
2237 if ((uid == old_uid) && (name[0] != '\0')) {
2238 SL_RETURN( name, _("sh_unix_getUIDname"));
2239 }
2240
2241 errno = 0;
2242 tempres = sh_getpwuid(uid);
2243 status = errno;
2244
2245 if (tempres == NULL) {
2246 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2247 sh_error_message(status),
2248 _("getpwuid"), (long) uid, _("completely missing"));
2249 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2250 }
2251
2252
2253 if (tempres->pw_name != NULL) {
2254 sl_strlcpy(name, tempres->pw_name, sizeof(name));
2255 old_uid = uid;
2256 SL_RETURN( name, _("sh_unix_getUIDname"));
2257 } else {
2258 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_PWNULL,
2259 sh_error_message(status),
2260 _("getpwuid"), (long) uid, _("pw_user"));
2261 SL_RETURN( NULL, _("sh_unix_getUIDname"));
2262 }
2263}
2264
2265char * sh_unix_getGIDname (int level, gid_t gid)
2266{
2267 struct group * tempres;
2268 int status = 0;
2269 static gid_t old_gid;
2270 static char name[32] = { '\0' };
2271
2272 SL_ENTER(_("sh_unix_getGIDname"));
2273
2274 if ((gid == old_gid) && (name[0] != '\0')) {
2275 SL_RETURN( name, _("sh_unix_getUIDname"));
2276 }
2277
2278 errno = 0;
2279 tempres = sh_getgrgid(gid);
2280 status = errno;
2281
2282 if (tempres == NULL) {
2283 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2284 sh_error_message(status),
2285 _("getgrgid"), (long) gid, _("completely missing"));
2286
2287 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2288 }
2289
2290 if (tempres->gr_name != NULL) {
2291 sl_strlcpy(name, tempres->gr_name, sizeof(name));
2292 old_gid = gid;
2293 SL_RETURN( name, _("sh_unix_getGIDname"));
2294 } else {
2295 sh_error_handle (level, FIL__, __LINE__, EINVAL, MSG_E_GRNULL,
2296 sh_error_message(status),
2297 _("getgrgid"), (long) gid, _("gr_name"));
2298 SL_RETURN( NULL, _("sh_unix_getGIDname"));
2299 }
2300}
2301
2302int sh_unix_getUser ()
2303{
2304 char * p;
2305 uid_t seuid, sruid;
2306
2307 SL_ENTER(_("sh_unix_getUser"));
2308
2309 seuid = geteuid();
2310
2311 sh.effective.uid = seuid;
2312
2313 p = sh_unix_getUIDdir (SH_ERR_ERR, seuid);
2314
2315 if (p == NULL)
2316 SL_RETURN((-1), _("sh_unix_getUser"));
2317 else
2318 {
2319 if (sl_strlen(p) >= SH_PATHBUF) {
2320 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2321 _("getpwuid"), (long) seuid, _("pw_home"));
2322 SL_RETURN((-1), _("sh_unix_getUser"));
2323 } else {
2324 sl_strlcpy ( sh.effective.home, p, SH_PATHBUF);
2325 }
2326 }
2327
2328 sruid = getuid();
2329
2330 sh.real.uid = sruid;
2331
2332 p = sh_unix_getUIDname (SH_ERR_ERR, sruid);
2333 if (p == NULL)
2334 SL_RETURN((-1), _("sh_unix_getUser"));
2335 else
2336 {
2337 if (sl_strlen(p) >= USER_MAX) {
2338 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2339 _("getpwuid"), (long) sruid, _("pw_user"));
2340 SL_RETURN((-1), _("sh_unix_getUser"));
2341 } else {
2342 sl_strlcpy ( sh.real.user, p, USER_MAX);
2343 }
2344 }
2345
2346 p = sh_unix_getUIDdir (SH_ERR_ERR, sruid);
2347
2348 if (p == NULL)
2349 SL_RETURN((-1), _("sh_unix_getUser"));
2350 else
2351 {
2352 if (sl_strlen(p) >= SH_PATHBUF) {
2353 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, EINVAL, MSG_E_PWLONG,
2354 _("getpwuid"), (long) sruid, _("pw_home"));
2355 SL_RETURN((-1), _("sh_unix_getUser"));
2356 } else {
2357 sl_strlcpy ( sh.real.home, p, SH_PATHBUF);
2358 }
2359 }
2360
2361 SL_RETURN((0), _("sh_unix_getUser"));
2362
2363 /* notreached */
2364}
2365
2366
2367int sh_unix_getline (SL_TICKET fd, char * line, int sizeofline)
2368{
2369 register int count;
2370 register int n = 0;
2371 char c;
2372
2373 SL_ENTER(_("sh_unix_getline"));
2374
2375 if (sizeofline < 2) {
2376 line[n] = '\0';
2377 SL_RETURN((0), _("sh_unix_getline"));
2378 }
2379
2380 while (n < sizeofline) {
2381
2382 count = sl_read (fd, &c, 1);
2383
2384 /* end of file
2385 */
2386 if (count < 1) {
2387 line[n] = '\0';
2388 n = -1;
2389 break;
2390 }
2391
2392 if (/* c != '\0' && */ c != '\n') {
2393 line[n] = c;
2394 ++n;
2395 } else if (c == '\n') {
2396 if (n > 0) {
2397 line[n] = '\0';
2398 break;
2399 } else {
2400 line[n] = '\n'; /* get newline only if only char on line */
2401 ++n;
2402 line[n] = '\0';
2403 break;
2404 }
2405 } else {
2406 line[n] = '\0';
2407 break;
2408 }
2409
2410 }
2411
2412
2413 line[sizeofline] = '\0'; /* make sure line is terminated */
2414 SL_RETURN((n), _("sh_unix_getline"));
2415}
2416
2417
2418#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
2419
2420/**************************************************************
2421 *
2422 * --- FILE INFO ---
2423 *
2424 **************************************************************/
2425
2426#if (defined(__linux__) && (defined(HAVE_LINUX_EXT2_FS_H) || defined(HAVE_EXT2FS_EXT2_FS_H))) || defined(HAVE_STAT_FLAGS)
2427
2428#if defined(__linux__)
2429
2430/* --- Determine ext2fs file attributes. ---
2431 */
2432#include <sys/ioctl.h>
2433#if defined(HAVE_EXT2FS_EXT2_FS_H)
2434#include <ext2fs/ext2_fs.h>
2435#else
2436#include <linux/ext2_fs.h>
2437#endif
2438
2439/* __linux__ includes */
2440#endif
2441
2442static
2443int sh_unix_getinfo_attr (char * name,
2444 unsigned long * flags,
2445 char * c_attr,
2446 int fd, struct stat * buf)
2447{
2448
2449/* TAKEN FROM:
2450 *
2451 * lsattr.c - List file attributes on an ext2 file system
2452 *
2453 * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
2454 * Laboratoire MASI, Institut Blaise Pascal
2455 * Universite Pierre et Marie Curie (Paris VI)
2456 *
2457 * This file can be redistributed under the terms of the GNU General
2458 * Public License
2459 */
2460
2461#ifdef HAVE_STAT_FLAGS
2462
2463 SL_ENTER(_("sh_unix_getinfo_attr"));
2464
2465 *flags = 0;
2466
2467 /* cast to void to avoid compiler warning about unused parameters */
2468 (void) fd;
2469 (void) name;
2470
2471#ifdef UF_NODUMP
2472 if (buf->st_flags & UF_NODUMP) {
2473 *flags |= UF_NODUMP;
2474 c_attr[0] = 'd';
2475 }
2476#endif
2477#ifdef UF_IMMUTABLE
2478 if (buf->st_flags & UF_IMMUTABLE) {
2479 *flags |= UF_IMMUTABLE;
2480 c_attr[1] = 'i';
2481 }
2482#endif
2483#ifdef UF_APPEND
2484 if (buf->st_flags & UF_APPEND) {
2485 *flags |= UF_APPEND;
2486 c_attr[2] = 'a';
2487 }
2488#endif
2489#ifdef UF_NOUNLINK
2490 if (buf->st_flags & UF_NOUNLINK) {
2491 *flags |= UF_NOUNLINK;
2492 c_attr[3] = 'u';
2493 }
2494#endif
2495#ifdef UF_OPAQUE
2496 if (buf->st_flags & UF_OPAQUE) {
2497 *flags |= UF_OPAQUE;
2498 c_attr[4] = 'o';
2499 }
2500#endif
2501#ifdef SF_ARCHIVED
2502 if (buf->st_flags & SF_ARCHIVED) {
2503 *flags |= SF_ARCHIVED;
2504 c_attr[5] = 'R';
2505 }
2506
2507#endif
2508#ifdef SF_IMMUTABLE
2509 if (buf->st_flags & SF_IMMUTABLE) {
2510 *flags |= SF_IMMUTABLE;
2511 c_attr[6] = 'I';
2512 }
2513#endif
2514#ifdef SF_APPEND
2515 if (buf->st_flags & SF_APPEND) {
2516 *flags |= SF_APPEND;
2517 c_attr[7] = 'A';
2518 }
2519#endif
2520#ifdef SF_NOUNLINK
2521 if (buf->st_flags & SF_NOUNLINK) {
2522 *flags |= SF_NOUNLINK;
2523 c_attr[8] = 'U';
2524 }
2525#endif
2526
2527 /* ! HAVE_STAT_FLAGS */
2528#else
2529
2530#ifdef HAVE_EXT2_IOCTLS
2531 int /* fd, */ r, f;
2532
2533 SL_ENTER(_("sh_unix_getinfo_attr"));
2534
2535 *flags = 0;
2536 (void) buf;
2537
2538 /* open() -> aud_open() R.Wichmann
2539 fd = aud_open (FIL__, __LINE__, SL_YESPRIV, name, O_RDONLY|O_NONBLOCK, 0);
2540 */
2541
2542 if (fd == -1 || name == NULL)
2543 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
2544
2545
2546 r = ioctl (fd, EXT2_IOC_GETFLAGS, &f);
2547 /* close (fd); */
2548
2549 if (r == -1)
2550 SL_RETURN(-1, _("sh_unix_getinfo_attr"));
2551
2552 if (f == 0)
2553 SL_RETURN(0, _("sh_unix_getinfo_attr"));
2554
2555 *flags = f;
2556
2557/* ! HAVE_EXT2_IOCTLS */
2558#else
2559
2560 SL_ENTER(_("sh_unix_getinfo_attr"));
2561
2562 *flags = 0; /* modified by R.Wichmann */
2563
2564/* ! HAVE_EXT2_IOCTLS */
2565#endif
2566/*
2567 * END
2568 *
2569 * lsattr.c - List file attributes on an ext2 file system
2570 */
2571
2572 if (*flags == 0)
2573 goto theend;
2574
2575#ifdef EXT2_SECRM_FL
2576 if ( (*flags & EXT2_SECRM_FL) != 0 ) c_attr[0] = 's';
2577#endif
2578#ifdef EXT2_UNRM_FL
2579 if ( (*flags & EXT2_UNRM_FL) != 0 ) c_attr[1] = 'u';
2580#endif
2581#ifdef EXT2_SYNC_FL
2582 if ( (*flags & EXT2_SYNC_FL) != 0 ) c_attr[2] = 'S';
2583#endif
2584#ifdef EXT2_IMMUTABLE_FL
2585 if ( (*flags & EXT2_IMMUTABLE_FL) != 0) c_attr[3] = 'i';
2586#endif
2587#ifdef EXT2_APPEND_FL
2588 if ( (*flags & EXT2_APPEND_FL) != 0 ) c_attr[4] = 'a';
2589#endif
2590#ifdef EXT2_NODUMP_FL
2591 if ( (*flags & EXT2_NODUMP_FL) != 0 ) c_attr[5] = 'd';
2592#endif
2593#ifdef EXT2_NOATIME_FL
2594 if ( (*flags & EXT2_NOATIME_FL) != 0) c_attr[6] = 'A';
2595#endif
2596#ifdef EXT2_COMPR_FL
2597 if ( (*flags & EXT2_COMPR_FL) != 0 ) c_attr[7] = 'c';
2598#endif
2599
2600#ifdef EXT2_TOPDIR_FL
2601 if ( (*flags & EXT2_TOPDIR_FL) != 0 ) c_attr[8] = 'T';
2602#endif
2603#ifdef EXT2_DIRSYNC_FL
2604 if ( (*flags & EXT2_DIRSYNC_FL) != 0 ) c_attr[9] = 'D';
2605#endif
2606#ifdef EXT2_NOTAIL_FL
2607 if ( (*flags & EXT2_NOTAIL_FL) != 0 ) c_attr[10] = 't';
2608#endif
2609#ifdef EXT2_JOURNAL_DATA_FL
2610 if ( (*flags & EXT2_JOURNAL_DATA_FL) != 0) c_attr[11] = 'j';
2611#endif
2612
2613 theend:
2614 /* ext2 */
2615#endif
2616
2617 c_attr[12] = '\0';
2618
2619 SL_RETURN(0, _("sh_unix_getinfo_attr"));
2620}
2621#else
2622static
2623int sh_unix_getinfo_attr (char * name,
2624 unsigned long * flags,
2625 char * c_attr,
2626 int fd, struct stat * buf)
2627{
2628 return 0;
2629}
2630
2631/* defined(__linux__) || defined(HAVE_STAT_FLAGS) */
2632#endif
2633
2634/* determine file type
2635 */
2636static
2637int sh_unix_getinfo_type (struct stat * buf,
2638 ShFileType * type,
2639 char * c_mode)
2640{
2641 SL_ENTER(_("sh_unix_getinfo_type"));
2642
2643 if ( S_ISREG(buf->st_mode) ) {
2644 (*type) = SH_FILE_REGULAR;
2645 c_mode[0] = '-';
2646 }
2647 else if ( S_ISLNK(buf->st_mode) ) {
2648 (*type) = SH_FILE_SYMLINK;
2649 c_mode[0] = 'l';
2650 }
2651 else if ( S_ISDIR(buf->st_mode) ) {
2652 (*type) = SH_FILE_DIRECTORY;
2653 c_mode[0] = 'd';
2654 }
2655 else if ( S_ISCHR(buf->st_mode) ) {
2656 (*type) = SH_FILE_CDEV;
2657 c_mode[0] = 'c';
2658 }
2659 else if ( S_ISBLK(buf->st_mode) ) {
2660 (*type) = SH_FILE_BDEV;
2661 c_mode[0] = 'b';
2662 }
2663 else if ( S_ISFIFO(buf->st_mode) ) {
2664 (*type) = SH_FILE_FIFO;
2665 c_mode[0] = '|';
2666 }
2667 else if ( S_ISSOCK(buf->st_mode) ) {
2668 (*type) = SH_FILE_SOCKET;
2669 c_mode[0] = 's';
2670 }
2671 else {
2672 (*type) = SH_FILE_UNKNOWN;
2673 c_mode[0] = '?';
2674 }
2675
2676 SL_RETURN(0, _("sh_unix_getinfo_type"));
2677}
2678
2679int sh_unix_get_ftype(char * fullpath)
2680{
2681 char c_mode[16];
2682 struct stat buf;
2683 ShFileType type;
2684 int res;
2685
2686 SL_ENTER(_("sh_unix_get_ftype"));
2687
2688 res = retry_lstat(FIL__, __LINE__, fullpath, &buf);
2689
2690 if (res < 0)
2691 SL_RETURN(SH_FILE_UNKNOWN, _("sh_unix_getinfo_type"));
2692
2693 sh_unix_getinfo_type (&buf, &type, c_mode);
2694
2695 SL_RETURN(type, _("sh_unix_get_ftype"));
2696}
2697
2698
2699static
2700int sh_unix_getinfo_mode (struct stat *buf,
2701 unsigned int * mode,
2702 char * c_mode)
2703{
2704
2705 SL_ENTER(_("sh_unix_getinfo_mode"));
2706
2707 (*mode) = buf->st_mode;
2708
2709 /* make 'ls'-like string */
2710
2711 if ( (buf->st_mode & S_IRUSR) != 0 ) c_mode[1] = 'r';
2712 if ( (buf->st_mode & S_IWUSR) != 0 ) c_mode[2] = 'w';
2713 if ( (buf->st_mode & S_IXUSR) != 0 ) {
2714 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 's';
2715 else c_mode[3] = 'x';
2716 } else {
2717 if ((buf->st_mode & S_ISUID) != 0 ) c_mode[3] = 'S';
2718 }
2719
2720 if ( (buf->st_mode & S_IRGRP) != 0 ) c_mode[4] = 'r';
2721 if ( (buf->st_mode & S_IWGRP) != 0 ) c_mode[5] = 'w';
2722 if ( (buf->st_mode & S_IXGRP) != 0 ) {
2723 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 's';
2724 else c_mode[6] = 'x';
2725 } else {
2726 if ((buf->st_mode & S_ISGID) != 0 ) c_mode[6] = 'S';
2727 }
2728
2729 if ( (buf->st_mode & S_IROTH) != 0 ) c_mode[7] = 'r';
2730 if ( (buf->st_mode & S_IWOTH) != 0 ) c_mode[8] = 'w';
2731#ifdef S_ISVTX /* not POSIX */
2732 if ( (buf->st_mode & S_IXOTH) != 0 ) {
2733 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 't';
2734 else c_mode[9] = 'x';
2735 } else {
2736 if ((buf->st_mode & S_ISVTX) != 0 ) c_mode[9] = 'T';
2737 }
2738#else
2739 if ( (buf->st_mode & S_IXOTH) != 0 ) c_mode[9] = 'x';
2740#endif
2741
2742 SL_RETURN(0, _("sh_unix_getinfo_mode"));
2743}
2744
2745
2746long IO_Limit = 0;
2747
2748void sh_unix_io_pause ()
2749{
2750 long runtime;
2751 float someval;
2752 unsigned long sometime;
2753
2754 if (IO_Limit == 0)
2755 {
2756 return;
2757 }
2758 else
2759 {
2760 runtime = (long) (time(NULL) - sh.statistics.time_start);
2761
2762 if (runtime > 0 && (long)(sh.statistics.bytes_hashed/runtime) > IO_Limit)
2763 {
2764 someval = sh.statistics.bytes_hashed - (IO_Limit * runtime);
2765 someval /= (float) IO_Limit;
2766 if (someval < 1.0)
2767 {
2768 someval *= 1000; /* milliseconds in a second */
2769 sometime = (unsigned long) someval;
2770 /* fprintf(stderr, "FIXME PAUSE %ld\n", sometime); */
2771 retry_msleep(0, sometime);
2772 }
2773 else
2774 {
2775 sometime = (unsigned long) someval;
2776 /* fprintf(stderr, "FIXME PAUSE %ld sec\n", sometime); */
2777 retry_msleep (sometime, 0);
2778 }
2779 }
2780 }
2781 return;
2782}
2783
2784int sh_unix_set_io_limit (const char * c)
2785{
2786 long val;
2787
2788 SL_ENTER(_("sh_unix_set_io_limit"));
2789
2790 val = strtol (c, (char **)NULL, 10);
2791 if (val < 0)
2792 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
2793 _("set I/O limit"), c);
2794
2795 val = (val < 0 ? 0 : val);
2796
2797 IO_Limit = val * 1024;
2798 SL_RETURN( 0, _("sh_unix_set_io_limit"));
2799}
2800
2801/* obtain file info
2802 */
2803extern int flag_err_debug;
2804
2805#include "sh_ignore.h"
2806
2807int sh_unix_checksum_size (char * filename, struct stat * fbuf,
2808 char * fileHash, int alert_timeout)
2809{
2810 file_type tmpFile;
2811 int status;
2812
2813 SL_ENTER(_("sh_unix_checksum_size"));
2814
2815 /* lookup file in database */
2816 status = sh_hash_get_it (filename, &tmpFile);
2817 if (status != 0) {
2818 goto out;
2819 }
2820
2821 /* if last < current get checksum */
2822 if (tmpFile.size < fbuf->st_size)
2823 {
2824 sl_strlcpy(fileHash,
2825 sh_tiger_generic_hash (filename, TIGER_FD, tmpFile.size,
2826 alert_timeout),
2827 KEY_LEN+1);
2828
2829 /* return */
2830 SL_RETURN( 0, _("sh_unix_checksum_size"));
2831 }
2832
2833 out:
2834 sl_strlcpy(fileHash,
2835 _("000000000000000000000000000000000000000000000000"),
2836 KEY_LEN+1);
2837 SL_RETURN( -1, _("sh_unix_checksum_size"));
2838}
2839
2840int sh_unix_getinfo (int level, char * filename, file_type * theFile,
2841 char * fileHash, int policy)
2842{
2843 char timestr[81];
2844 long runtim;
2845 struct stat buf;
2846 struct stat lbuf;
2847 struct stat fbuf;
2848 int stat_return;
2849
2850 ShFileType type;
2851 unsigned int mode;
2852 char * name;
2853 char * tmp;
2854 char * tmp2;
2855
2856 char * linknamebuf;
2857 int linksize;
2858
2859 extern int get_the_fd (SL_TICKET ticket);
2860
2861 SL_TICKET rval_open;
2862 int fd;
2863 int fstat_return;
2864
2865 time_t tend;
2866 time_t tstart;
2867
2868
2869 char * path = NULL;
2870
2871 int alert_timeout = 120;
2872
2873 path = theFile->fullpath;
2874
2875#if 0
2876 {
2877 char pwd[256];
2878 printf("%d %s %s %s (%s)\n", flagrel, theFile->fullpath, filename, path,
2879 getcwd (pwd, 256));
2880 }
2881#endif
2882
2883 SL_ENTER(_("sh_unix_getinfo"));
2884
2885 /* --- Stat the file, and get checksum. ---
2886 */
2887 tstart = time(NULL);
2888
2889 stat_return = retry_lstat (FIL__, __LINE__,
2890 path /* theFile->fullpath */, &buf);
2891
2892 fd = -1;
2893 fstat_return = -1;
2894 rval_open = -1;
2895
2896 if (stat_return == 0 && S_ISREG(buf.st_mode))
2897 {
2898 rval_open = sl_open_fastread (path /* theFile->fullpath */, SL_YESPRIV);
2899
2900 alert_timeout = 120; /* this is per 8K block now ! */
2901
2902 if (path[1] == 'p' && path[5] == '/' && path[2] == 'r' &&
2903 path[3] == 'o' && path[4] == 'c' && path[0] == '/')
2904 {
2905 /* seven is magic */
2906 alert_timeout = 7;
2907 }
2908
2909 fd = get_the_fd(rval_open);
2910 }
2911
2912 tend = time(NULL);
2913
2914 /* An unprivileged user may slow lstat/open to a crawl
2915 * with clever path/symlink setup
2916 */
2917 if ((tend - tstart) > (time_t) /* 60 */ 6)
2918 {
2919 tmp2 = sh_util_safe_name (theFile->fullpath);
2920 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_TOOLATE,
2921 (long)(tend - tstart), tmp2);
2922 SH_FREE(tmp2);
2923 }
2924
2925 if (fd >= 0)
2926 fstat_return = retry_fstat (FIL__, __LINE__, fd, &fbuf);
2927 else
2928 fd = -1;
2929
2930
2931 /* --- case 1: lstat failed ---
2932 */
2933 if (stat_return != 0)
2934 {
2935 stat_return = errno;
2936 if (!SL_ISERROR(rval_open))
2937 sl_close(rval_open);
2938 if (sh.flag.checkSum == SH_CHECK_INIT ||
2939 (sh_hash_have_it (theFile->fullpath) >= 0 &&
2940 theFile->reported == S_FALSE))
2941 {
2942 if (S_FALSE == sh_ignore_chk_del(theFile->fullpath)) {
2943 tmp2 = sh_util_safe_name (theFile->fullpath);
2944 sh_error_handle (level, FIL__, __LINE__, stat_return, MSG_FI_LSTAT,
2945 sh_error_message (stat_return), tmp2);
2946 SH_FREE(tmp2);
2947 }
2948 }
2949 SL_RETURN((-1),_("sh_unix_getinfo"));
2950 }
2951
2952 /* --- case 2: not a regular file ---
2953 */
2954 else if (! S_ISREG(buf.st_mode))
2955 {
2956 if (fileHash != NULL)
2957 sl_strlcpy(fileHash,
2958 _("000000000000000000000000000000000000000000000000"),
2959 KEY_LEN+1);
2960 }
2961
2962 /* --- case 3a: a regular file, fstat ok ---
2963 */
2964 else if (fstat_return == 0 &&
2965 buf.st_mode == fbuf.st_mode &&
2966 buf.st_ino == fbuf.st_ino &&
2967 buf.st_uid == fbuf.st_uid &&
2968 buf.st_gid == fbuf.st_gid &&
2969 buf.st_dev == fbuf.st_dev )
2970 {
2971 if (fileHash != NULL)
2972 {
2973 if ((theFile->check_mask & MODI_CHK) == 0)
2974 {
2975 sl_strlcpy(fileHash,
2976 _("000000000000000000000000000000000000000000000000"),
2977 KEY_LEN+1);
2978 }
2979 else if ((theFile->check_mask & MODI_PREL) != 0 &&
2980 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
2981 alert_timeout))
2982 {
2983 if (0 != sh_prelink_run (theFile->fullpath,
2984 fileHash, alert_timeout))
2985 sl_strlcpy(fileHash,
2986 _("000000000000000000000000000000000000000000000000"),
2987 KEY_LEN+1);
2988 }
2989 else
2990 {
2991 tiger_fd = rval_open;
2992 sl_strlcpy(fileHash,
2993 sh_tiger_generic_hash (theFile->fullpath,
2994 TIGER_FD, 0,
2995 alert_timeout),
2996 KEY_LEN+1);
2997 if ((theFile->check_mask & MODI_SGROW) != 0)
2998 {
2999 sl_rewind(rval_open);
3000 tiger_fd = rval_open;
3001 sh_unix_checksum_size (theFile->fullpath, &fbuf,
3002 &fileHash[KEY_LEN + 1],
3003 alert_timeout);
3004 }
3005 }
3006 }
3007 }
3008
3009 /* --- case 3b: a regular file, fstat ok, but different ---
3010 */
3011 else if (fstat_return == 0 && S_ISREG(fbuf.st_mode))
3012 {
3013 memcpy (&buf, &fbuf, sizeof( struct stat ));
3014
3015 if (fileHash != NULL)
3016 {
3017 if ((theFile->check_mask & MODI_CHK) == 0)
3018 {
3019 sl_strlcpy(fileHash,
3020 _("000000000000000000000000000000000000000000000000"),
3021 KEY_LEN+1);
3022 }
3023 else if (policy == SH_LEVEL_PRELINK &&
3024 S_TRUE == sh_prelink_iself(rval_open, fbuf.st_size,
3025 alert_timeout))
3026 {
3027 if (0 != sh_prelink_run (theFile->fullpath,
3028 fileHash, alert_timeout))
3029 sl_strlcpy(fileHash,
3030 _("000000000000000000000000000000000000000000000000"),
3031 KEY_LEN+1);
3032 }
3033 else
3034 {
3035 tiger_fd = rval_open;
3036 sl_strlcpy(fileHash,
3037 sh_tiger_generic_hash (theFile->fullpath, TIGER_FD, 0,
3038 alert_timeout),
3039 KEY_LEN + 1);
3040 if ((theFile->check_mask & MODI_SGROW) != 0)
3041 {
3042 sl_rewind(rval_open);
3043 tiger_fd = rval_open;
3044 sh_unix_checksum_size (theFile->fullpath, &fbuf,
3045 &fileHash[KEY_LEN + 1],
3046 alert_timeout);
3047 }
3048 }
3049 }
3050 }
3051
3052 /* --- case 4: a regular file, fstat failed ---
3053 */
3054
3055 else /* fstat_return != 0 or !S_ISREG(fbuf->st_mode) */
3056 {
3057 fstat_return = errno;
3058 if (fileHash != NULL)
3059 sl_strlcpy(fileHash,
3060 _("000000000000000000000000000000000000000000000000"),
3061 KEY_LEN + 1);
3062
3063 tmp2 = sh_util_safe_name (theFile->fullpath);
3064 sh_error_handle (level, FIL__, __LINE__, fstat_return, MSG_E_READ,
3065 tmp2);
3066 SH_FREE(tmp2);
3067 }
3068
3069
3070 /* --- Determine file type. ---
3071 */
3072 memset (theFile->c_mode, '-', 10);
3073 theFile->c_mode[10] = '\0';
3074
3075 memset (theFile->link_c_mode, '-', 10);
3076 theFile->link_c_mode[10] = '\0';
3077
3078 sh_unix_getinfo_type (&buf, &type, theFile->c_mode);
3079 theFile->type = type;
3080
3081#if defined(__linux__) || defined(HAVE_STAT_FLAGS)
3082
3083 /* --- Determine file attributes. ---
3084 */
3085 memset (theFile->c_attributes, '-', 12);
3086 theFile->c_attributes[12] = '\0';
3087 theFile->attributes = 0;
3088
3089 if (theFile->c_mode[0] != 'c' && theFile->c_mode[0] != 'b' &&
3090 theFile->c_mode[0] != 'l' )
3091 sh_unix_getinfo_attr(theFile->fullpath,
3092 &theFile->attributes, theFile->c_attributes,
3093 fd, &buf);
3094#endif
3095
3096 if (!SL_ISERROR(rval_open))
3097 sl_close(rval_open);
3098
3099
3100 /* --- I/O limit. ---
3101 */
3102 if (IO_Limit > 0)
3103 {
3104 runtim = (long) (time(NULL) - sh.statistics.time_start);
3105
3106 if (runtim > 0 && (long)(sh.statistics.bytes_hashed/runtim) > IO_Limit)
3107 retry_msleep(1, 0);
3108 }
3109
3110 /* --- Determine permissions. ---
3111 */
3112 sh_unix_getinfo_mode (&buf, &mode, theFile->c_mode);
3113
3114 /* --- Trivia. ---
3115 */
3116 theFile->dev = buf.st_dev;
3117 theFile->ino = buf.st_ino;
3118 theFile->mode = buf.st_mode;
3119 theFile->hardlinks = buf.st_nlink;
3120 theFile->owner = buf.st_uid;
3121 theFile->group = buf.st_gid;
3122 theFile->rdev = buf.st_rdev;
3123 theFile->size = buf.st_size;
3124 theFile->blksize = (unsigned long) buf.st_blksize;
3125 theFile->blocks = (unsigned long) buf.st_blocks;
3126 theFile->atime = buf.st_atime;
3127 theFile->mtime = buf.st_mtime;
3128 theFile->ctime = buf.st_ctime;
3129
3130
3131 /* --- Owner and group. ---
3132 */
3133
3134 if ( (name = sh_unix_getGIDname(SH_ERR_ALL,
3135 buf.st_gid)) != NULL) {
3136 sl_strlcpy (theFile->c_group, name, GROUP_MAX+1);
3137 } else {
3138
3139 tmp2 = sh_util_safe_name (theFile->fullpath);
3140
3141 if (policy == SH_LEVEL_ALLIGNORE)
3142 {
3143 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
3144 MSG_FI_NOGRP,
3145 (long) buf.st_gid, tmp2);
3146 }
3147 else
3148 {
3149 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
3150 MSG_FI_NOGRP,
3151 (long) buf.st_gid, tmp2);
3152 }
3153 SH_FREE(tmp2);
3154 sl_snprintf(theFile->c_group, GROUP_MAX+1, "%d", (long) buf.st_gid);
3155 }
3156
3157
3158 if ( (name = sh_unix_getUIDname(SH_ERR_ALL,
3159 buf.st_uid)) != NULL) {
3160 sl_strlcpy (theFile->c_owner, name, USER_MAX+1);
3161 } else {
3162
3163 tmp2 = sh_util_safe_name (theFile->fullpath);
3164
3165 if (policy == SH_LEVEL_ALLIGNORE)
3166 {
3167 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__, ENOENT,
3168 MSG_FI_NOUSR,
3169 (long) buf.st_uid, tmp2);
3170 }
3171 else
3172 {
3173 sh_error_handle (ShDFLevel[SH_ERR_T_NAME], FIL__, __LINE__, ENOENT,
3174 MSG_FI_NOUSR,
3175 (long) buf.st_uid, tmp2);
3176 }
3177 SH_FREE(tmp2);
3178 sl_snprintf(theFile->c_owner, USER_MAX+1, "%d", (long) buf.st_uid);
3179 }
3180
3181 /* --- Output the file. ---
3182 */
3183 if (flag_err_debug == SL_TRUE)
3184 {
3185 tmp2 = sh_util_safe_name ((filename == NULL) ?
3186 theFile->fullpath : filename);
3187 sl_strlcpy(timestr, sh_unix_time(theFile->mtime), 81);
3188 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LIST,
3189 theFile->c_mode,
3190 theFile->hardlinks,
3191 theFile->c_owner,
3192 theFile->c_group,
3193 (unsigned long) theFile->size,
3194 timestr,
3195 tmp2);
3196 SH_FREE(tmp2);
3197 }
3198
3199 /* --- Check for links. ---
3200 */
3201 if (theFile->c_mode[0] == 'l')
3202 {
3203
3204 linknamebuf = SH_ALLOC(PATH_MAX);
3205
3206 /* flawfinder: ignore */
3207 linksize = readlink (theFile->fullpath, linknamebuf, PATH_MAX-1);
3208
3209 if (linksize < (PATH_MAX-1) && linksize >= 0)
3210 linknamebuf[linksize] = '\0';
3211 else
3212 linknamebuf[PATH_MAX-1] = '\0';
3213
3214 if (linksize < 0)
3215 {
3216 linksize = errno;
3217 tmp2 = sh_util_safe_name (theFile->fullpath);
3218 sh_error_handle (level, FIL__, __LINE__, linksize, MSG_FI_RDLNK,
3219 sh_error_message (linksize), tmp2);
3220 SH_FREE(tmp2);
3221 SH_FREE(linknamebuf);
3222 theFile->linkpath[0] = '-';
3223 theFile->linkpath[1] = '\0';
3224 SL_RETURN((-1),_("sh_unix_getinfo"));
3225 }
3226
3227 if (linknamebuf[0] == '/')
3228 {
3229 sl_strlcpy (theFile->linkpath, linknamebuf, PATH_MAX);
3230 }
3231 else
3232 {
3233 tmp = sh_util_basename(theFile->fullpath);
3234 sl_strlcpy (theFile->linkpath,
3235 tmp,
3236 PATH_MAX);
3237 SH_FREE(tmp);
3238 sl_strlcat (theFile->linkpath,
3239 "/", PATH_MAX);
3240 sl_strlcat (theFile->linkpath,
3241 linknamebuf,
3242 PATH_MAX);
3243 }
3244
3245 /* stat the link
3246 */
3247 stat_return = retry_lstat (FIL__, __LINE__, theFile->linkpath, &lbuf);
3248
3249 /* check for error
3250 */
3251 if (stat_return != 0)
3252 {
3253 stat_return = errno;
3254 tmp = sh_util_safe_name (theFile->fullpath);
3255 tmp2 = sh_util_safe_name (theFile->linkpath);
3256 if (stat_return != ENOENT)
3257 {
3258 sh_error_handle (level, FIL__, __LINE__, stat_return,
3259 MSG_FI_LSTAT,
3260 sh_error_message (stat_return), tmp2);
3261 }
3262 else
3263 {
3264 /* a dangling link -- everybody seems to have plenty of them
3265 */
3266 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_DLNK,
3267 tmp, tmp2);
3268 }
3269 theFile->linkisok = BAD;
3270 SH_FREE(tmp);
3271 SH_FREE(tmp2);
3272 SH_FREE(linknamebuf);
3273 /*
3274 * changed Tue Feb 10 16:16:13 CET 2004:
3275 * add dangling symlinks into database
3276 * SL_RETURN((-1),_("sh_unix_getinfo"));
3277 */
3278 theFile->linkmode = 0;
3279 SL_RETURN((0),_("sh_unix_getinfo"));
3280 }
3281
3282 theFile->linkisok = GOOD;
3283
3284
3285 /* --- Determine file type. ---
3286 */
3287 sh_unix_getinfo_type (&lbuf, &type, theFile->link_c_mode);
3288 theFile->type = type;
3289
3290 /* --- Determine permissions. ---
3291 */
3292 sh_unix_getinfo_mode (&lbuf, &mode, theFile->link_c_mode);
3293 theFile->linkmode = lbuf.st_mode;
3294
3295 /* --- Output the link. ---
3296 */
3297 if (theFile->linkisok == GOOD)
3298 {
3299 tmp2 = sh_util_safe_name (linknamebuf);
3300 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_FI_LLNK,
3301 theFile->link_c_mode, tmp2);
3302 SH_FREE(tmp2);
3303 }
3304 SH_FREE(linknamebuf);
3305 }
3306 SL_RETURN((0),_("sh_unix_getinfo"));
3307}
3308
3309/* #if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE) */
3310#endif
3311
3312int sh_unix_unlock (char * lockfile, char * flag);
3313int sh_unix_lock (char * lockfile, char * flag);
3314
3315/* check whether file is locked
3316 */
3317int sh_unix_test_and_lock (char * filename, char * lockfile)
3318{
3319 static struct stat buf;
3320 int status = 0;
3321
3322
3323 SL_TICKET fd;
3324 char line_in[128];
3325
3326 SL_ENTER(_("sh_unix_test_and_lock"));
3327
3328 if (filename != NULL)
3329 {
3330 status = retry_lstat (FIL__, __LINE__, filename, &buf);
3331
3332 /* no logfile to lock
3333 */
3334 if (status < 0)
3335 SL_RETURN((-1),_("sh_unix_test_and_lock"));
3336 }
3337
3338 status = retry_lstat (FIL__, __LINE__, lockfile, &buf);
3339
3340 /* --- No lock file found, try to lock. ---
3341 */
3342
3343 if (status < 0 && errno == ENOENT)
3344 {
3345 if (0 == sh_unix_lock (lockfile, filename))
3346 {
3347 if (filename != NULL)
3348 sh.flag.islocked = GOOD;
3349 SL_RETURN((0),_("sh_unix_test_and_lock"));
3350 }
3351 }
3352 else if (status == 0 && buf.st_size == 0)
3353 {
3354 if (filename != NULL)
3355 sh.flag.islocked = GOOD;
3356 sh_unix_unlock (lockfile, filename);
3357 if (filename != NULL)
3358 sh.flag.islocked = BAD;
3359 if (0 == sh_unix_lock (lockfile, filename))
3360 {
3361 if (filename != NULL)
3362 sh.flag.islocked = GOOD;
3363 SL_RETURN((0),_("sh_unix_test_and_lock"));
3364 }
3365 else
3366 {
3367 sh_error_handle ((-1), FIL__, __LINE__, status,
3368 MSG_E_SUBGEN,
3369 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
3370 _("sh_unix_test_and_lock"));
3371 SL_RETURN((-1),_("sh_unix_test_and_lock"));
3372 }
3373 }
3374
3375 /* --- Check on lock. ---
3376 */
3377
3378 if (status >= 0)
3379 {
3380 fd = sl_open_read (lockfile, SL_YESPRIV);
3381 if (SL_ISERROR(fd))
3382 sh_error_handle ((-1), FIL__, __LINE__, fd,
3383 MSG_E_SUBGEN,
3384 (filename == NULL) ? _("Cannot open PID file for read") : _("Cannot open lock file for read"),
3385 _("sh_unix_test_and_lock"));
3386 }
3387 else
3388 fd = -1;
3389
3390 if (!SL_ISERROR(fd))
3391 {
3392 /* read the PID in the lock file
3393 */
3394 status = sh_unix_getline (fd, line_in, sizeof(line_in)-1);
3395
3396 /* convert to numeric
3397 */
3398 if (status > 0)
3399 {
3400 errno = 0;
3401 status = strtol(line_in, (char **)NULL, 10);
3402 if (errno == ERANGE || status <= 0)
3403 {
3404 sh_error_handle ((-1), FIL__, __LINE__, status,
3405 MSG_E_SUBGEN,
3406 (filename == NULL) ? _("Bad PID in PID file") : _("Bad PID in lock file"),
3407 _("sh_unix_test_and_lock"));
3408
3409 status = -1;
3410 }
3411 }
3412 else
3413 {
3414 sh_error_handle ((-1), FIL__, __LINE__, status,
3415 MSG_E_SUBGEN,
3416 (filename == NULL) ? _("Cannot read PID file") : _("Cannot read lock file"),
3417 _("sh_unix_test_and_lock"));
3418 }
3419 sl_close(fd);
3420
3421 if (status == (int) getpid())
3422 {
3423 if (filename != NULL)
3424 sh.flag.islocked = GOOD;
3425 SL_RETURN((0),_("sh_unix_test_and_lock"));
3426 }
3427
3428
3429 /* --- Check whether the process exists. ---
3430 */
3431 if (status > 0)
3432 {
3433 errno = 0;
3434 status = aud_kill (FIL__, __LINE__, status, 0);
3435
3436 /* Does not exist, so remove the stale lock
3437 * and create a new one.
3438 */
3439 if (status < 0 && errno == ESRCH)
3440 {
3441 if (filename != NULL)
3442 sh.flag.islocked = GOOD;
3443 if (0 != sh_unix_unlock(lockfile, filename) && (filename !=NULL))
3444 sh.flag.islocked = BAD;
3445 else
3446 {
3447 if (0 == sh_unix_lock (lockfile, filename))
3448 {
3449 if (filename != NULL)
3450 sh.flag.islocked = GOOD;
3451 SL_RETURN((0),_("sh_unix_test_and_lock"));
3452 }
3453 else
3454 {
3455 sh_error_handle ((-1), FIL__, __LINE__, status,
3456 MSG_E_SUBGEN,
3457 (filename == NULL) ? _("Cannot create PID file") : _("Cannot create lock file"),
3458 _("sh_unix_test_and_lock"));
3459 }
3460 if (filename != NULL)
3461 sh.flag.islocked = BAD;
3462 }
3463 }
3464 else
3465 {
3466 sh_error_handle ((-1), FIL__, __LINE__, status,
3467 MSG_E_SUBGEN,
3468 (filename == NULL) ? _("Cannot remove stale PID file, PID may be a running process") : _("Cannot remove stale lock file, PID may be a running process"),
3469 _("sh_unix_test_and_lock"));
3470 if (filename != NULL)
3471 sh.flag.islocked = BAD;
3472 }
3473 }
3474 }
3475 SL_RETURN((-1),_("sh_unix_testlock"));
3476}
3477
3478/* write the PID file
3479 */
3480int sh_unix_write_pid_file()
3481{
3482 return sh_unix_test_and_lock(NULL, sh.srvlog.alt);
3483}
3484
3485/* write lock for filename
3486 */
3487int sh_unix_write_lock_file(char * filename)
3488{
3489 int i;
3490 char * lockfile;
3491
3492 if (filename == NULL)
3493 return (-1);
3494
3495 i = 6 + sl_strlen(filename);
3496 lockfile = SH_ALLOC(i);
3497 sl_strlcpy(lockfile, filename, i);
3498 sl_strlcat(lockfile, _(".lock"), i);
3499 i = sh_unix_test_and_lock(filename, lockfile);
3500 SH_FREE(lockfile);
3501 return i;
3502}
3503
3504int sh_unix_unlock(char * lockfile, char * flag)
3505{
3506 int error = 0;
3507
3508 SL_ENTER(_("sh_unix_unlock"));
3509
3510 /* --- Logfile is not locked to us. ---
3511 */
3512 if (sh.flag.islocked == BAD && flag != NULL)
3513 SL_RETURN((-1),_("sh_unix_unlock"));
3514
3515 /* --- Check whether the directory is secure. ---
3516 */
3517 if (0 != tf_trust_check (lockfile, SL_YESPRIV))
3518 SL_RETURN((-1),_("sh_unix_unlock"));
3519
3520 /* --- Delete the lock file. ---
3521 */
3522 error = retry_aud_unlink (FIL__, __LINE__, lockfile);
3523
3524 if (error == 0)
3525 {
3526 if (flag != NULL)
3527 sh.flag.islocked = BAD; /* not locked anymore */
3528 }
3529 else if (flag != NULL)
3530 {
3531 error = errno;
3532 sh_error_handle ((-1), FIL__, __LINE__, error, MSG_E_UNLNK,
3533 sh_error_message(error), lockfile);
3534 SL_RETURN((-1),_("sh_unix_unlock"));
3535 }
3536 SL_RETURN((0),_("sh_unix_unlock"));
3537}
3538
3539/* rm lock for filename
3540 */
3541int sh_unix_rm_lock_file(char * filename)
3542{
3543 int i;
3544 char * lockfile;
3545
3546 if (filename == NULL)
3547 return (-1);
3548
3549 i = 6 + sl_strlen(filename);
3550 lockfile = SH_ALLOC(i);
3551 sl_strlcpy(lockfile, filename, i);
3552 sl_strlcat(lockfile, _(".lock"), i);
3553 i = sh_unix_unlock(lockfile, filename);
3554 SH_FREE(lockfile);
3555 return i;
3556}
3557
3558/* rm lock for filename
3559 */
3560int sh_unix_rm_pid_file()
3561{
3562 return sh_unix_unlock(sh.srvlog.alt, NULL);
3563}
3564
3565int sh_unix_lock (char * lockfile, char * flag)
3566{
3567 struct stat buf;
3568 int status;
3569 int filed;
3570 int errnum;
3571 char myPid[64];
3572 SL_TICKET fd;
3573 extern int get_the_fd (SL_TICKET ticket);
3574
3575
3576 status = retry_lstat (FIL__, __LINE__, lockfile, &buf);
3577
3578 SL_ENTER(_("sh_unix_lock"));
3579
3580 if (0 == status)
3581 {
3582 if (flag != NULL)
3583 sh.flag.islocked = BAD;
3584 SL_RETURN((-1),_("sh_unix_lock"));
3585 }
3586
3587 sprintf (myPid, "%ld\n", (long) getpid()); /* known to fit */
3588
3589 fd = sl_open_write (lockfile, SL_YESPRIV);
3590
3591 if (!SL_ISERROR(fd))
3592 {
3593 errnum = sl_write (fd, myPid, sl_strlen(myPid));
3594 filed = get_the_fd(fd);
3595 fchmod (filed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
3596 sl_close (fd);
3597
3598 if (!SL_ISERROR(errnum))
3599 {
3600 if (flag != NULL)
3601 sh.flag.islocked = GOOD;
3602 SL_RETURN((0),_("sh_unix_lock"));
3603 }
3604 }
3605
3606 TPT((0, FIL__, __LINE__, _("msg=<open pid file failed>\n")));
3607 if (flag != NULL)
3608 sh.flag.islocked = BAD;
3609 SL_RETURN((-1),_("sh_unix_lock"));
3610
3611 /* notreached */
3612}
3613
3614/* Test whether file exists
3615 */
3616int sh_unix_file_stat(char * path)
3617{
3618 struct stat buf;
3619
3620 SL_ENTER(_("sh_unix_file_stat"));
3621
3622 if (-1 == retry_stat(FIL__, __LINE__, path, &buf))
3623 SL_RETURN( (0), _("sh_unix_file_stat"));
3624 else
3625 SL_RETURN( (-1), _("sh_unix_file_stat"));
3626}
3627
3628
3629/* Test whether file exists, is a character device, allows read
3630 * access, and is not world writeable.
3631 */
3632int sh_unix_file_exists(int fd)
3633{
3634 struct stat buf;
3635
3636 SL_ENTER(_("sh_unix_file_exists"));
3637
3638 if (retry_fstat(FIL__, __LINE__, fd, &buf) == -1)
3639 SL_RETURN( (-1), _("sh_unix_file_exists"));
3640 else if ( S_ISCHR(buf.st_mode) && 0 != (S_IROTH & buf.st_mode)
3641 /*
3642 * #if !defined(__CYGWIN32__) && !defined(__CYGWIN__)
3643 * && 0 == (S_IWOTH & buf.st_mode)
3644 * #endif
3645 */
3646 )
3647 SL_RETURN( (0), _("sh_unix_file_exists"));
3648 else
3649 SL_RETURN( (-1), _("sh_unix_file_exists"));
3650}
3651
3652static char preq[16];
3653
3654/* return true if database is remote
3655 */
3656int file_is_remote ()
3657{
3658 static int init = 0;
3659
3660 SL_ENTER(_("file_is_remote"));
3661
3662 if (init == 0)
3663 {
3664 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
3665 ++init;
3666 }
3667 if (0 == sl_strncmp (sh.data.path, preq, 15))
3668 {
3669 SL_RETURN( S_TRUE, _("file_is_remote"));
3670 }
3671 SL_RETURN( S_FALSE, _("file_is_remote"));
3672}
3673
3674/* Return the path to the configuration/database file.
3675 */
3676char * file_path(char what, char flag)
3677{
3678 static int init = 0;
3679
3680 SL_ENTER(_("file_path"));
3681
3682 if (init == 0)
3683 {
3684 sl_strlcpy(preq, _("REQ_FROM_SERVER"), 16);
3685 ++init;
3686 }
3687
3688 switch (what)
3689 {
3690
3691 case 'C':
3692 if (0 == sl_strncmp (sh.conf.path, preq, 15))
3693 {
3694#if defined(SH_WITH_SERVER)
3695 if (sh.flag.isserver == S_TRUE && sl_strlen(sh.conf.path) == 15)
3696 SL_RETURN( NULL, _("file_path"));
3697 if (sh.flag.isserver == S_TRUE)
3698 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
3699#endif
3700 if (flag == 'R')
3701 SL_RETURN( preq, _("file_path"));
3702 if (flag == 'I')
3703 {
3704 if (sl_strlen(sh.conf.path) == 15)
3705 SL_RETURN( NULL, _("file_path"));
3706 else
3707 SL_RETURN( &(sh.conf.path[15]), _("file_path"));
3708 }
3709 SL_RETURN ( preq, _("file_path"));
3710 }
3711 else
3712 SL_RETURN( sh.conf.path, _("file_path"));
3713 /* break; *//* unreachable */
3714
3715 case 'D':
3716 if (0 == sl_strncmp (sh.data.path, preq, 15))
3717 {
3718 if (flag == 'R')
3719 SL_RETURN( preq, _("file_path"));
3720 if (flag == 'W' && sl_strlen(sh.data.path) == 15)
3721 SL_RETURN (NULL, _("file_path"));
3722 if (flag == 'W')
3723 SL_RETURN( &(sh.data.path[15]), _("file_path"));
3724 }
3725 else
3726 SL_RETURN( sh.data.path, _("file_path"));
3727 break;
3728
3729 default:
3730 SL_RETURN( NULL, _("file_path"));
3731 }
3732
3733 return NULL; /* notreached */
3734}
3735/************************************************/
3736/**** Mlock Utilities ****/
3737/************************************************/
3738
3739#include <limits.h>
3740
3741int sh_unix_pagesize()
3742{
3743 int pagesize = 4096;
3744#if defined(_SC_PAGESIZE)
3745 pagesize = sysconf(_SC_PAGESIZE);
3746#elif defined(_SC_PAGE_SIZE)
3747 pagesize = sysconf(_SC_PAGE_SIZE);
3748#elif defined(HAVE_GETPAGESIZE)
3749 pagesize = getpagesize();
3750#elif defined(PAGESIZE)
3751 pagesize = PAGESIZE;
3752#endif
3753
3754 return ((pagesize > 0) ? pagesize : 4096);
3755}
3756
3757typedef struct sh_page_lt {
3758 unsigned long page_start;
3759 int page_refcount;
3760 char file[64];
3761 int line;
3762 struct sh_page_lt * next;
3763} sh_page_l;
3764
3765sh_page_l * sh_page_locked = NULL;
3766volatile int page_locking = 0;
3767
3768unsigned long sh_unix_lookup_page (void * in_addr, size_t len, int * num_pages)
3769{
3770 int pagesize = sh_unix_pagesize();
3771 unsigned long addr = (unsigned long) in_addr;
3772
3773 unsigned long pagebase;
3774 unsigned long pagediff;
3775 unsigned long pagenum = addr / pagesize;
3776
3777 SL_ENTER(_("sh_unix_lookup_page"));
3778#if 0
3779 fprintf(stderr, "mlock: --> base %ld, pagenum: %ld\n",
3780 addr, pagenum);
3781#endif
3782
3783 /* address of first page
3784 */
3785 pagebase = pagenum * pagesize;
3786
3787 /* number of pages
3788 */
3789 pagediff = (addr + len) - pagebase;
3790 pagenum = pagediff / pagesize;
3791 if (pagenum * pagesize < pagediff)
3792 ++pagenum;
3793
3794#if 0
3795 fprintf(stderr, "mlock: --> pagebase %ld, pagediff %ld, (addr + len) %ld\n",
3796 pagebase, pagediff, (addr + len));
3797#endif
3798
3799 *num_pages = pagenum;
3800 SL_RETURN((pagebase), _("sh_unix_lookup_page"));
3801}
3802
3803
3804#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
3805int sh_unix_mlock (char * file, int line, void * in_addr, size_t len)
3806{
3807 int num_pages;
3808 int status = 0;
3809 int pagesize;
3810 sh_page_l * page_list = sh_page_locked;
3811 unsigned long addr;
3812#ifdef TEST_MLOCK
3813 int i = 0;
3814#endif
3815
3816 SL_ENTER(_("sh_unix_mlock"));
3817
3818 if (0 != page_locking)
3819 {
3820 SL_RETURN((-1), _("sh_unix_mlock"));
3821 }
3822 page_locking = 1;
3823
3824 pagesize = sh_unix_pagesize();
3825 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
3826
3827#ifdef TEST_MLOCK
3828 fprintf(stderr, "mlock: addr %ld, base %ld, pages: %d, length %d\n",
3829 (unsigned long) in_addr, addr, num_pages, len);
3830#endif
3831
3832 /* increase refcount of locked pages
3833 * addr is first page; num_pages is #(consecutive pages) to lock
3834 */
3835 while ((page_list != NULL) && (num_pages > 0))
3836 {
3837#ifdef TEST_MLOCK
3838 fprintf(stderr, "mlock: check page %d: %ld [%d]\n",
3839 i, page_list->page_start, page_list->page_refcount);
3840#endif
3841 if (page_list->page_start == addr)
3842 {
3843 page_list->page_refcount += 1;
3844 num_pages -= 1;
3845 addr += pagesize;
3846#ifdef TEST_MLOCK
3847 fprintf(stderr, "mlock: found page %d: %ld [%d], next page %ld\n",
3848 i, page_list->page_start, page_list->page_refcount, addr);
3849#endif
3850 }
3851#ifdef TEST_MLOCK
3852 ++i;
3853#endif
3854 page_list = page_list->next;
3855 }
3856
3857 /* mlock some more pages, if needed
3858 */
3859 while (num_pages > 0)
3860 {
3861#ifdef TEST_MLOCK
3862 fprintf(stderr, "mlock: lock page %d: mlock %ld [num_pages %d]\n",
3863 i, addr, num_pages);
3864 ++i;
3865#endif
3866 page_list = SH_ALLOC(sizeof(sh_page_l));
3867 page_list->page_start = addr;
3868 page_list->page_refcount = 1;
3869 sl_strlcpy(page_list->file, file, 64);
3870 page_list->line = line;
3871 status = mlock( (void *) addr, pagesize);
3872 if (status != 0)
3873 {
3874#ifdef TEST_MLOCK
3875 fprintf(stderr, "mlock: error: %s\n", sh_error_message(errno));
3876#endif
3877 SH_FREE(page_list);
3878 page_locking = 0;
3879 SL_RETURN((status), _("sh_unix_mlock"));
3880 }
3881 page_list->next = sh_page_locked;
3882 sh_page_locked = page_list;
3883 num_pages -= 1;
3884 addr += pagesize;
3885 }
3886
3887 page_locking = 0;
3888 SL_RETURN((status), _("sh_unix_mlock"));
3889}
3890#else
3891int sh_unix_mlock (void * in_addr, size_t len)
3892{
3893 (void) in_addr; (void) len;
3894 return -1;
3895}
3896#endif
3897
3898#if defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
3899int sh_unix_munlock (void * in_addr, size_t len)
3900{
3901 int num_pages;
3902 int unlocked = 0;
3903 int status = 0;
3904 int pagesize;
3905 sh_page_l * page_list = sh_page_locked;
3906 sh_page_l * page_last;
3907 unsigned long addr;
3908
3909 int test_count;
3910 int test_status;
3911 int test_pages;
3912
3913#ifdef TEST_MLOCK
3914 int i = 0;
3915#endif
3916
3917 SL_ENTER(_("sh_unix_munlock"));
3918
3919 if (0 != page_locking)
3920 {
3921 SL_RETURN((-1), _("sh_unix_munlock"));
3922 }
3923 page_locking = 1;
3924
3925 pagesize = sh_unix_pagesize();
3926 addr = sh_unix_lookup_page (in_addr, len, &num_pages);
3927
3928#ifdef TEST_MLOCK
3929 fprintf(stderr, "munlock: in_addr %ld, addr %ld, pages: %d, length %d\n",
3930 (unsigned long) in_addr, addr, num_pages, len);
3931#endif
3932
3933 test_pages = num_pages;
3934
3935 /* reduce refcount of locked pages
3936 * addr is first page; num_pages is #(consecutive pages) to lock
3937 */
3938 while ((page_list != NULL) && (num_pages > 0))
3939 {
3940#ifdef TEST_MLOCK
3941 fprintf(stderr, "munlock: page %d: %ld [%d]\n",
3942 i, page_list->page_start, page_list->page_refcount);
3943#endif
3944
3945 test_status = 0;
3946 for (test_count = 0; test_count < test_pages; ++test_count)
3947 {
3948 if (page_list->page_start == (addr + (test_count * pagesize)))
3949 {
3950 test_status = 1;
3951 break;
3952 }
3953 }
3954
3955 if (test_status == 1)
3956 {
3957 page_list->page_refcount -= 1;
3958 if (page_list->page_refcount == 0)
3959 {
3960 status = munlock ( (void *) addr, pagesize);
3961 ++unlocked;
3962 }
3963 num_pages -= 1;
3964#ifdef TEST_MLOCK
3965 fprintf(stderr,
3966 "munlock: page %d: %ld [refcount %d], refcount reduced\n",
3967 i, page_list->page_start, page_list->page_refcount);
3968#endif
3969 }
3970#ifdef TEST_MLOCK
3971 ++i;
3972#endif
3973 page_list = page_list->next;
3974 }
3975
3976#ifdef TEST_MLOCK
3977 i = 0;
3978#endif
3979
3980 if (unlocked > 0)
3981 {
3982 page_list = sh_page_locked;
3983 page_last = sh_page_locked;
3984
3985 while ((page_list != NULL) && (unlocked > 0))
3986 {
3987 if (page_list->page_refcount == 0)
3988 {
3989#ifdef TEST_MLOCK
3990 fprintf(stderr, "munlock: remove page %d: %ld [refcount %d]\n",
3991 i, page_list->page_start, page_list->page_refcount);
3992#endif
3993 if (page_last != page_list)
3994 {
3995 page_last->next = page_list->next;
3996 SH_FREE(page_list);
3997 page_list = page_last->next;
3998 }
3999 else
4000 {
4001 page_last = page_list->next;
4002 if (page_list == sh_page_locked)
4003 sh_page_locked = page_list->next;
4004 SH_FREE(page_list);
4005 page_list = page_last;
4006 }
4007 --unlocked;
4008 }
4009 else
4010 {
4011#ifdef TEST_MLOCK
4012 fprintf(stderr, "munlock: skip page %d: %ld [refcount %d]\n",
4013 i, page_list->page_start, page_list->page_refcount);
4014#endif
4015
4016 page_last = page_list;
4017 page_list = page_list->next;
4018 }
4019#ifdef TEST_MLOCK
4020 ++i;
4021#endif
4022 }
4023 }
4024
4025 page_locking = 0;
4026 SL_RETURN((status), _("sh_unix_munlock"));
4027}
4028#else
4029int sh_unix_munlock (void * in_addr, size_t len)
4030{
4031 (void) in_addr; (void) len;
4032 return -1;
4033}
4034#endif
4035
4036int sh_unix_count_mlock()
4037{
4038 int i = 0;
4039 char str[128];
4040 sh_page_l * page_list = sh_page_locked;
4041
4042 SL_ENTER(_("sh_unix_count_mlock"));
4043 while (page_list != NULL)
4044 {
4045#ifdef WITH_TPT
4046 sl_snprintf(str, sizeof(str), _("file: %s line: %d page: %d"),
4047 page_list->file, page_list->line, i+1);
4048 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, i, MSG_E_SUBGEN,
4049 str, _("sh_unix_count_mlock"));
4050#endif
4051 page_list = page_list->next;
4052 ++i;
4053 }
4054 sl_snprintf(str, sizeof(str), _("%d pages locked"), i);
4055 sh_error_handle(SH_ERR_INFO, FIL__, __LINE__, i, MSG_E_SUBGEN,
4056 str, _("sh_unix_count_mlock"));
4057 SL_RETURN((i), _("sh_unix_count_mlock"));
4058}
4059
4060/************************************************/
4061/************************************************/
4062/**** Stealth Utilities ****/
4063/************************************************/
4064/************************************************/
4065#ifdef SH_STEALTH
4066
4067void sh_unix_xor_code (char * str, int len)
4068{
4069 register int i;
4070
4071 for (i = 0; i < len; ++i) str[i] ^= (char) XOR_CODE;
4072 return;
4073}
4074
4075#if !defined(SH_STEALTH_MICRO)
4076
4077static unsigned long off_data = 0;
4078static unsigned long max_data = 0;
4079static int stealth_init = BAD;
4080
4081int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len);
4082unsigned long first_hex_block(SL_TICKET fd, unsigned long * max);
4083
4084/*
4085 * --- Get hidden data from a block of hex data. ---
4086 */
4087int sh_unix_getline_stealth (SL_TICKET fd, char * str, int len)
4088{
4089 int add_off, llen;
4090
4091 SL_ENTER(_("sh_unix_getline_stealth"));
4092
4093 /* --- Initialize. ---
4094 */
4095 if (stealth_init == BAD)
4096 {
4097 off_data = first_hex_block(fd, &max_data);
4098 if (off_data == 0)
4099 {
4100 dlog(1, FIL__, __LINE__,
4101 _("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"));
4102 sh_error_handle ((-1), FIL__, __LINE__, EIO, MSG_P_NODATA,
4103 _("Stealth config file."));
4104 aud_exit (FIL__, __LINE__, EXIT_FAILURE);
4105 }
4106 stealth_init = GOOD;
4107 }
4108
4109 /* --- Seek to proper position. ---
4110 */
4111 sl_seek(fd, off_data);
4112
4113 /* --- Read one line. ---
4114 */
4115 add_off = hideout_hex_block(fd, (unsigned char *) str, len);
4116 off_data += add_off;
4117
4118
4119 llen = sl_strlen(str);
4120 SL_RETURN(llen, _("sh_unix_getline_stealth"));
4121}
4122
4123int hideout_hex_block(SL_TICKET fd, unsigned char * str, int len)
4124{
4125
4126 register int i, j, k;
4127 unsigned char c, e;
4128 register int num;
4129 unsigned char mask[9] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
4130 unsigned long here = 0;
4131 unsigned long retval = 0;
4132
4133 SL_ENTER(_("hideout_hex_block"));
4134
4135 i = 0;
4136 while (i < len)
4137 {
4138 for (j = 0; j < 8; ++j)
4139 {
4140
4141 /* --- Get a low byte, modify, read back. ---
4142 */
4143 for (k = 0; k < 2; ++k)
4144 {
4145 /* -- Skip whitespace. ---
4146 */
4147 c = ' ';
4148 do {
4149 do {
4150 num = sl_read (fd, &c, 1);
4151 } while (num == 0 && errno == EINTR);
4152 if (num == 0)
4153 SL_RETURN((-1), _("hideout_hex_block"));
4154 ++here;
4155 } while (c == '\n' || c == '\t' || c == '\r' ||
4156 c == ' ');
4157 }
4158
4159
4160 /* --- e is the value of the low byte. ---
4161 */
4162 e = (unsigned char) sh_util_hexchar( c );
4163 if ((e & mask[7]) != 0) /* bit is set */
4164 str[i] |= mask[j];
4165 else /* bit is not set */
4166 str[i] &= ~mask[j];
4167
4168 }
4169 if (str[i] == '\n') break;
4170 ++i;
4171 }
4172
4173 if (i != 0)
4174 str[i] = '\0';
4175 else
4176 str[i+1] = '\0';
4177 retval += here;
4178
4179 SL_RETURN(retval, _("hideout_hex_block"));
4180}
4181
4182/* --- Get offset of first data block. ---
4183 */
4184unsigned long first_hex_block(SL_TICKET fd, unsigned long * max)
4185{
4186 int i;
4187 register int num = 1;
4188 char c;
4189 int nothex = 0;
4190 unsigned long retval = 0;
4191 int this_line = 0;
4192 char theline[SH_BUFSIZE];
4193
4194 SL_ENTER(_("first_hex_block"));
4195
4196 *max = 0;
4197
4198 while (1)
4199 {
4200 theline[0] = '\0';
4201 this_line = 0;
4202 c = '\0';
4203 while (c != '\n' && num > 0)
4204 {
4205 do {
4206 num = sl_read (fd, &c, 1);
4207 } while (num == 0 && errno == EINTR);
4208 if (num > 0)
4209 theline[this_line] = c;
4210 else
4211 SL_RETURN((0), _("first_hex_block"));
4212 this_line += num;
4213 }
4214 theline[this_line] = '\0';
4215
4216 /* not only 'newline' */
4217 if (this_line > 60)
4218 {
4219 nothex = 0;
4220 i = 0;
4221 while (nothex == 0 && i < (this_line-1))
4222 {
4223 if (! isxdigit((int)theline[i])) nothex = 1;
4224 ++i;
4225 }
4226 if (nothex == 1) retval += this_line;
4227 }
4228 else
4229 {
4230 nothex = 1;
4231 retval += this_line;
4232 }
4233
4234 if (nothex == 0)
4235 {
4236 *max = 0;
4237 do {
4238 do {
4239 num = sl_read (fd, theline, SH_BUFSIZE);
4240 } while (num == 0 && errno == EINTR);
4241 for (i = 0; i < num; ++i)
4242 {
4243 c = theline[i];
4244 if (c == '\n' || c == '\t' || c == '\r' || c == ' ')
4245 ;
4246 else if (!isxdigit((int)c))
4247 break;
4248 else
4249 *max += 1;
4250 }
4251 } while (num > 0);
4252
4253 *max /= 16;
4254 SL_RETURN((retval), _("first_hex_block"));
4255 }
4256
4257 }
4258 /* SL_RETURN((0), _("first_hex_block")); *//* unreachable */
4259}
4260
4261 /* if !defined(SH_STEALTH_MICRO) */
4262#endif
4263
4264 /* ifdef SH_STEALTH */
4265#endif
4266
4267/*
4268 * anti-debugger code
4269 */
4270#if defined(SCREW_IT_UP)
4271volatile int sh_not_traced = 0;
4272
4273#ifdef HAVE_GETTIMEOFDAY
4274struct timeval save_tv;
4275#endif
4276
4277void sh_sigtrap_handler (int signum)
4278{
4279#ifdef HAVE_GETTIMEOFDAY
4280 struct timeval tv;
4281 long difftv;
4282
4283 gettimeofday(&tv, NULL);
4284 difftv = (tv.tv_sec - save_tv.tv_sec) * 1000000 +
4285 (tv.tv_usec - save_tv.tv_usec);
4286 if (difftv > 500000)
4287 _exit(6);
4288#endif
4289 sh_not_traced += signum;
4290 return;
4291}
4292#endif
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