source: trunk/src/sh_suidchk.c@ 157

Last change on this file since 157 was 150, checked in by katerina, 17 years ago

Fix more 'label at end of compound statement' (closes ticket #86).
File size: 51.5 KB
Line 
1/* SAMHAIN file system integrity testing */
2/* Copyright (C) 2001 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 <sys/types.h>
27#include <sys/stat.h>
28#include <fcntl.h>
29#include <unistd.h>
30#include <errno.h>
31#include <limits.h>
32
33#ifdef HAVE_SCHED_H
34#include <sched.h>
35#endif
36
37#ifdef SH_USE_SUIDCHK
38
39#undef FIL__
40#define FIL__ _("sh_suidchk.c")
41
42#if defined (SH_WITH_CLIENT) || defined (SH_STANDALONE)
43
44#if TIME_WITH_SYS_TIME
45#include <sys/time.h>
46#include <time.h>
47#else
48#if HAVE_SYS_TIME_H
49#include <sys/time.h>
50#else
51#include <time.h>
52#endif
53#endif
54
55#ifdef HAVE_DIRENT_H
56#include <dirent.h>
57#define NAMLEN(dirent) sl_strlen((dirent)->d_name)
58#else
59#define dirent direct
60#define NAMLEN(dirent) (dirent)->d_namlen
61#ifdef HAVE_SYS_NDIR_H
62#include <sys/ndir.h>
63#endif
64#ifdef HAVE_SYS_DIR_H
65#include <sys/dir.h>
66#endif
67#ifdef HAVE_NDIR_H
68#include <ndir.h>
69#endif
70#endif
71#define NEED_ADD_DIRENT
72
73#include "samhain.h"
74#include "sh_pthread.h"
75#include "sh_utils.h"
76#include "sh_error.h"
77#include "sh_modules.h"
78#include "sh_suidchk.h"
79#include "sh_hash.h"
80#include "sh_unix.h"
81#include "sh_files.h"
82#include "sh_schedule.h"
83#include "sh_calls.h"
84
85
86sh_rconf sh_suidchk_table[] = {
87 {
88 N_("severitysuidcheck"),
89 sh_suidchk_set_severity
90 },
91 {
92 N_("suidcheckactive"),
93 sh_suidchk_set_activate
94 },
95 {
96 N_("suidcheckinterval"),
97 sh_suidchk_set_timer
98 },
99 {
100 N_("suidcheckschedule"),
101 sh_suidchk_set_schedule
102 },
103 {
104 N_("suidcheckexclude"),
105 sh_suidchk_set_exclude
106 },
107 {
108 N_("suidcheckfps"),
109 sh_suidchk_set_fps
110 },
111 {
112 N_("suidcheckyield"),
113 sh_suidchk_set_yield
114 },
115 {
116 N_("suidchecknosuid"),
117 sh_suidchk_set_nosuid
118 },
119 {
120 N_("suidcheckquarantinefiles"),
121 sh_suidchk_set_quarantine
122 },
123 {
124 N_("suidcheckquarantinemethod"),
125 sh_suidchk_set_qmethod
126 },
127 {
128 N_("suidcheckquarantinedelete"),
129 sh_suidchk_set_qdelete
130 },
131 {
132 NULL,
133 NULL
134 },
135};
136
137
138static time_t lastcheck = (time_t) 0;
139static int ShSuidchkActive = S_TRUE;
140static time_t ShSuidchkInterval = 7200;
141static long ShSuidchkFps = 0;
142static int ShSuidchkNosuid = S_FALSE;
143static int ShSuidchkYield = S_FALSE;
144static int ShSuidchkQEnable = S_FALSE;
145static int ShSuidchkQMethod = SH_Q_CHANGEPERM;
146static int ShSuidchkQDelete = S_FALSE;
147static int ShSuidchkSeverity = SH_ERR_SEVERE;
148static char * ShSuidchkExclude = NULL;
149static size_t ExcludeLen = 0;
150
151static time_t FileLimNow = 0;
152static time_t FileLimStart = 0;
153static long FileLimNum = 0;
154static long FileLimTotal = 0;
155
156static sh_schedule_t * ShSuidchkSched = NULL;
157
158static char *
159filesystem_type (char * path, char * relpath, struct stat * statp);
160
161#ifndef PATH_MAX
162#define PATH_MAX 1024
163#endif
164
165extern unsigned long sh_files_maskof (int class);
166
167static void set_defaults (void)
168{
169 ShSuidchkActive = S_TRUE;
170 ShSuidchkInterval = 7200;
171 ShSuidchkFps = 0;
172 ShSuidchkNosuid = S_FALSE;
173 ShSuidchkYield = S_FALSE;
174 ShSuidchkQEnable = S_FALSE;
175 ShSuidchkQMethod = SH_Q_CHANGEPERM;
176 ShSuidchkQDelete = S_FALSE;
177 ShSuidchkSeverity = SH_ERR_SEVERE;
178 if (ShSuidchkExclude != NULL)
179 SH_FREE(ShSuidchkExclude);
180 ShSuidchkExclude = NULL;
181 ExcludeLen = 0;
182
183 FileLimNow = 0;
184 FileLimStart = 0;
185 FileLimNum = 0;
186 FileLimTotal = 0;
187
188 return;
189}
190
191/* Recursively descend into the directory to make sure that
192 * there is no symlink in the path.
193 */
194static int do_truncate_int (char * path, int depth)
195{
196 char * q;
197 struct stat one;
198 struct stat two;
199 int fd;
200 char errbuf[SH_ERRBUF_SIZE];
201
202 if (depth > 99)
203 {
204 sh_error_handle ((-1), FIL__, __LINE__, EINVAL,
205 MSG_SUID_ERROR,
206 _("do_truncate: max depth 99 exceeded"));
207 return -1;
208 }
209 ++depth;
210 if (path[0] != '/')
211 {
212 sh_error_handle ((-1), FIL__, __LINE__, EINVAL,
213 MSG_SUID_ERROR,
214 _("do_truncate: not an absolute path"));
215 return -1;
216 }
217 ++path;
218 q = strchr(path, '/');
219 if (q)
220 {
221 *q = '\0';
222 if (0 != retry_lstat(FIL__, __LINE__, path, &one))
223 {
224 sh_error_handle ((-1), FIL__, __LINE__, errno,
225 MSG_SUID_ERROR,
226 sh_error_message(errno, errbuf, sizeof(errbuf)));
227 *q = '/';
228 return -1;
229 }
230 if (/*@-usedef@*/!S_ISDIR(one.st_mode)/*@+usedef@*/)
231
232 {
233 sh_error_handle ((-1), FIL__, __LINE__, EINVAL,
234 MSG_SUID_ERROR,
235 _("Possible race: not a directory"));
236 *q = '/';
237 return -1;
238 }
239
240
241 if (0 != chdir(path))
242 {
243 sh_error_handle ((-1), FIL__, __LINE__, errno,
244 MSG_SUID_ERROR,
245 sh_error_message(errno, errbuf, sizeof(errbuf)));
246 *q = '/';
247 return -1;
248 }
249 *q = '/';
250 if (0 != retry_lstat(FIL__, __LINE__, ".", &two))
251 {
252 sh_error_handle ((-1), FIL__, __LINE__, errno,
253 MSG_SUID_ERROR,
254 sh_error_message(errno, errbuf, sizeof(errbuf)));
255 return -1;
256 }
257 if (/*@-usedef@*/(one.st_dev != two.st_dev) ||
258 (one.st_ino != two.st_ino) ||
259 (!S_ISDIR(two.st_mode))/*@+usedef@*/)
260 {
261 sh_error_handle ((-1), FIL__, __LINE__, EINVAL,
262 MSG_SUID_ERROR,
263 _("Possible race: lstat(dir) != lstat(.)"));
264 return -1;
265 }
266
267
268 return (do_truncate_int(q, depth));
269 }
270 else
271 {
272 /* no more '/', so this is the file
273 */
274 if (*path == '\0')
275 return -1;
276 if (0 != retry_lstat(FIL__, __LINE__, path, &one))
277 {
278 sh_error_handle ((-1), FIL__, __LINE__, errno,
279 MSG_SUID_ERROR,
280 sh_error_message(errno, errbuf, sizeof(errbuf)));
281 return -1;
282 }
283 fd = open(path, O_RDWR);
284 if (-1 == fd)
285 {
286 sh_error_handle ((-1), FIL__, __LINE__, errno,
287 MSG_SUID_ERROR,
288 sh_error_message(errno, errbuf, sizeof(errbuf)));
289 return -1;
290 }
291 if (0 != retry_fstat(FIL__, __LINE__, fd, &two))
292 {
293 sh_error_handle ((-1), FIL__, __LINE__, errno,
294 MSG_SUID_ERROR,
295 sh_error_message(errno, errbuf, sizeof(errbuf)));
296 (void) close(fd);
297 return -1;
298 }
299 if (/*@-usedef@*/(one.st_dev != two.st_dev) ||
300 (one.st_ino != two.st_ino)/*@+usedef@*/)
301 {
302 sh_error_handle ((-1), FIL__, __LINE__, EINVAL,
303 MSG_SUID_ERROR,
304 _("Possible race: lstat != fstat"));
305 (void) close(fd);
306 return -1;
307 }
308 if (!S_ISREG(two.st_mode))
309 {
310 sh_error_handle ((-1), FIL__, __LINE__, EINVAL,
311 MSG_SUID_ERROR,
312 _("Possible race: not a regular file"));
313 (void) close(fd);
314 return -1;
315 }
316 if ((0 == (two.st_mode & S_ISUID)) && (0 == (two.st_mode & S_ISGID)))
317 {
318 sh_error_handle ((-1), FIL__, __LINE__, EINVAL,
319 MSG_SUID_ERROR,
320 _("Possible race: not a suid/sgid file"));
321 (void) close(fd);
322 return -1;
323 }
324 if (ShSuidchkQDelete == S_FALSE)
325 {
326 if ((two.st_mode & S_ISUID) > 0)
327 two.st_mode -= S_ISUID;
328 if ((two.st_mode & S_ISGID) > 0)
329 two.st_mode -= S_ISGID;
330#ifdef HAVE_FCHMOD
331 if (-1 == /*@-unrecog@*/fchmod(fd, two.st_mode)/*@+unrecog@*/)
332 {
333 sh_error_handle ((-1), FIL__, __LINE__, errno,
334 MSG_SUID_ERROR,
335 sh_error_message(errno, errbuf, sizeof(errbuf)));
336 (void) close(fd);
337 return -1;
338 }
339#else
340 sh_error_handle ((-1), FIL__, __LINE__, errno,
341 MSG_SUID_ERROR,
342 _("The fchmod() function is not available"));
343 (void) close(fd);
344 return -1;
345#endif
346 if (two.st_nlink > 1)
347 {
348 sh_error_handle ((-1), FIL__, __LINE__, 0,
349 MSG_SUID_ERROR,
350 _("Not truncated because hardlink count gt 1"));
351 (void) close(fd);
352 return -1;
353 }
354 /* The man page says: 'POSIX has ftruncate'
355 */
356 if (-1 == /*@-unrecog@*/ftruncate(fd, 0)/*@+unrecog@*/)
357 {
358 sh_error_handle ((-1), FIL__, __LINE__, errno,
359 MSG_SUID_ERROR,
360 sh_error_message(errno, errbuf, sizeof(errbuf)));
361 (void) close(fd);
362 return -1;
363 }
364 }
365 else
366 {
367 if (-1 == retry_aud_unlink(FIL__, __LINE__, path))
368 {
369 sh_error_handle ((-1), FIL__, __LINE__, errno,
370 MSG_SUID_ERROR,
371 sh_error_message(errno, errbuf, sizeof(errbuf)));
372 (void) close(fd);
373 return -1;
374 }
375 }
376 (void) close (fd);
377 return (0);
378 }
379}
380
381static int do_truncate (const char * path_in)
382{
383 int caperr;
384 int result;
385 char * path;
386 char errbuf[SH_ERRBUF_SIZE];
387
388 if (0 != chdir("/"))
389 {
390 sh_error_handle ((-1), FIL__, __LINE__, errno,
391 MSG_SUID_ERROR,
392 sh_error_message(errno, errbuf, sizeof(errbuf)));
393 }
394
395 if (0 != (caperr = sl_get_cap_qdel()))
396 {
397 sh_error_handle((-1), FIL__, __LINE__, caperr, MSG_E_SUBGEN,
398 sh_error_message (caperr, errbuf, sizeof(errbuf)),
399 _("sl_get_cap_qdel"));
400 }
401
402 path = sh_util_strdup (path_in);
403 result = do_truncate_int (path, 0);
404 SH_FREE(path);
405
406 if (0 != (caperr = sl_drop_cap_qdel()))
407 {
408 sh_error_handle((-1), FIL__, __LINE__, caperr, MSG_E_SUBGEN,
409 sh_error_message (caperr, errbuf, sizeof(errbuf)),
410 _("sl_drop_cap_qdel"));
411 }
412
413 if (0 != chdir("/"))
414 {
415 sh_error_handle ((-1), FIL__, __LINE__, errno,
416 MSG_SUID_ERROR,
417 sh_error_message(errno, errbuf, sizeof(errbuf)));
418 }
419 return result;
420}
421
422static void sh_q_delete(const char * fullpath)
423{
424 int status;
425 char * msg;
426 char * tmp;
427
428 if (do_truncate (fullpath) == -1)
429 {
430 status = errno;
431 msg = SH_ALLOC(SH_BUFSIZE);
432 tmp = sh_util_safe_name(fullpath);
433
434 (void) sl_snprintf(msg, SH_BUFSIZE,
435 _("Problem quarantining file. File NOT quarantined. errno = %ld"),
436 status);
437 sh_error_handle (ShSuidchkSeverity,
438 FIL__, __LINE__,
439 status,
440 MSG_SUID_QREPORT, msg,
441 tmp );
442 SH_FREE(tmp);
443 SH_FREE(msg);
444 }
445 else
446 {
447 tmp = sh_util_safe_name(fullpath);
448 sh_error_handle (ShSuidchkSeverity,
449 FIL__, __LINE__, 0,
450 MSG_SUID_QREPORT,
451 _("Quarantine method applied"),
452 tmp );
453 SH_FREE(tmp);
454 }
455 return;
456}
457
458static void sh_q_move(const char * fullpath, file_type * theFile,
459 const char * timestrc, const char * timestra,
460 const char * timestrm)
461{
462 int status;
463 int readFile = -1;
464 int writeFile = -1;;
465 struct stat fileInfo;
466 ssize_t count;
467 char * msg;
468 char * tmp;
469 char * basetmp;
470 char * filetmp;
471 char buffer[1024];
472 char * dir = SH_ALLOC(PATH_MAX+1);
473 mode_t umask_old;
474 FILE * filePtr = NULL;
475
476 (void) sl_strlcpy (dir, DEFAULT_QDIR, PATH_MAX+1);
477
478 if (retry_stat (FIL__, __LINE__, dir, &fileInfo) != 0)
479 {
480 /* Quarantine directory does not exist,
481 */
482 status = errno;
483 msg = SH_ALLOC(SH_BUFSIZE);
484 tmp = sh_util_safe_name(fullpath);
485
486 (void) sl_snprintf(msg, SH_BUFSIZE,
487 _("Problem quarantining file. File NOT quarantined. errno = %ld (stat)"),
488 status);
489 sh_error_handle (ShSuidchkSeverity,
490 FIL__, __LINE__,
491 status,
492 MSG_SUID_QREPORT, msg,
493 tmp );
494 SH_FREE(tmp);
495 SH_FREE(msg);
496 }
497 else
498 {
499 if (retry_lstat (FIL__, __LINE__,
500 fullpath, &fileInfo) == -1)
501 {
502 status = errno;
503 msg = SH_ALLOC(SH_BUFSIZE);
504 tmp = sh_util_safe_name(fullpath);
505
506 (void) sl_snprintf(msg, SH_BUFSIZE, _("I/O error. errno = %ld(stat)"), status);
507 sh_error_handle (ShSuidchkSeverity,
508 FIL__, __LINE__,
509 status,
510 MSG_SUID_QREPORT,
511 msg, tmp );
512 SH_FREE(tmp);
513 SH_FREE(msg);
514 }
515 else
516 {
517 basetmp = sh_util_strdup(fullpath);
518 filetmp = SH_ALLOC(PATH_MAX+1);
519 tmp = sh_util_basename(basetmp);
520
521 (void) sl_snprintf(filetmp, PATH_MAX+1, "%s/%s",
522 DEFAULT_QDIR, tmp);
523 SH_FREE(tmp);
524 SH_FREE(basetmp);
525
526 readFile = open (fullpath, O_RDONLY);
527 if (readFile != -1)
528 writeFile = open (filetmp, O_WRONLY|O_CREAT);
529
530 if ((readFile == -1) || (writeFile == -1))
531 {
532 status = errno;
533 msg = SH_ALLOC(SH_BUFSIZE);
534 tmp = sh_util_safe_name(fullpath);
535
536 (void) sl_snprintf(msg, SH_BUFSIZE, _("Problem quarantining file. File NOT quarantined. errno = %ld (open)"), status);
537 sh_error_handle (ShSuidchkSeverity,
538 FIL__, __LINE__, status,
539 MSG_SUID_QREPORT,
540 msg, tmp );
541 SH_FREE(tmp);
542 SH_FREE(msg);
543 }
544 else
545 {
546 /* sizeof(buffer) is 1024
547 */
548 while ((count = (int) read (readFile, buffer, sizeof (buffer))) > 0)
549 {
550 if ((int) write (writeFile, buffer, (size_t) count) != count)
551 {
552 status = errno;
553 msg = SH_ALLOC(SH_BUFSIZE);
554 tmp = sh_util_safe_name(fullpath);
555
556 (void) sl_snprintf(msg, SH_BUFSIZE,
557 _("I/O error. errno = %ld (write)"), status);
558 sh_error_handle (ShSuidchkSeverity,
559 FIL__,
560 __LINE__,
561 status,
562 MSG_SUID_QREPORT,
563 msg, tmp );
564 SH_FREE(tmp);
565 SH_FREE(msg);
566 }
567 }
568 }
569
570 (void) close (readFile);
571 (void) fchmod(writeFile, S_IRUSR | S_IWUSR | S_IXUSR);
572 (void) close (writeFile);
573
574 if (do_truncate (fullpath) == -1)
575 {
576 status = errno;
577 msg = SH_ALLOC(SH_BUFSIZE);
578 tmp = sh_util_safe_name(fullpath);
579
580 (void) sl_snprintf(msg, SH_BUFSIZE,
581 _("Problem quarantining file. File NOT quarantined. errno = %ld"),
582 status);
583 sh_error_handle (ShSuidchkSeverity,
584 FIL__, __LINE__, status,
585 MSG_SUID_QREPORT,
586 msg, tmp );
587 SH_FREE(tmp);
588 SH_FREE(msg);
589 }
590 else
591 {
592 tmp = sh_util_basename(fullpath);
593
594 (void) sl_snprintf(filetmp, PATH_MAX+1, "%s/%s.info",
595 DEFAULT_QDIR,
596 tmp);
597
598 SH_FREE(tmp);
599 /*
600 * avoid chmod by setting umask
601 */
602 umask_old = umask (0077);
603 filePtr = fopen (filetmp, "w+");
604
605 /*@-usedef@*/
606 if (filePtr)
607 {
608 fprintf(filePtr,
609 _("File Info:\n filename=%s\n size=%lu\n owner=%s(%d)\n group=%s(%d)\n ctime=%s\n atime=%s\n mtime=%s\n"),
610 fullpath,
611 (unsigned long) theFile->size,
612 theFile->c_owner, (int) theFile->owner,
613 theFile->c_group, (int) theFile->group,
614 timestrc, timestra, timestrm);
615 (void) fclose (filePtr);
616 }
617 /*@+usedef@*/
618 umask (umask_old);
619
620 tmp = sh_util_safe_name(fullpath);
621 sh_error_handle (ShSuidchkSeverity,
622 FIL__,__LINE__,
623 0, MSG_SUID_QREPORT,
624 _("Quarantine method applied"),
625 tmp );
626 SH_FREE(tmp);
627 }
628 SH_FREE(filetmp);
629 }
630 }
631 SH_FREE(dir);
632 return;
633}
634
635static void sh_q_changeperm(const char * fullpath)
636{
637 int caperr;
638 int status;
639 char * msg;
640 char * tmp;
641 struct stat fileInfo;
642 struct stat fileInfo_F;
643 int cperm_status = 0;
644 int file_d = -1;
645 char errbuf[SH_ERRBUF_SIZE];
646
647 if (retry_lstat(FIL__, __LINE__, fullpath, &fileInfo) == -1)
648 {
649 status = errno;
650 msg = SH_ALLOC(SH_BUFSIZE);
651 tmp = sh_util_safe_name(fullpath);
652
653 (void) sl_snprintf(msg, SH_BUFSIZE, _("I/O error. errno = %ld"), status);
654 sh_error_handle (ShSuidchkSeverity,
655 FIL__, __LINE__,
656 status,
657 MSG_SUID_QREPORT, msg,
658 tmp );
659 SH_FREE(tmp);
660 SH_FREE(msg);
661 cperm_status = -1;
662 }
663
664 if (cperm_status == 0)
665 {
666 if (0 != (caperr = sl_get_cap_qdel()))
667 {
668 sh_error_handle((-1), FIL__, __LINE__,
669 caperr, MSG_E_SUBGEN,
670 sh_error_message (caperr, errbuf, sizeof(errbuf)),
671 _("sl_get_cap_qdel"));
672 cperm_status = -1;
673 }
674 }
675
676 if (cperm_status == 0)
677 {
678 file_d = aud_open (FIL__, __LINE__, SL_YESPRIV,
679 fullpath, O_RDONLY, 0);
680 if (-1 == file_d)
681 {
682 status = errno;
683 msg = SH_ALLOC(SH_BUFSIZE);
684 tmp = sh_util_safe_name(fullpath);
685
686 (void) sl_snprintf(msg, SH_BUFSIZE, _("I/O error. errno = %ld"), status);
687 sh_error_handle (ShSuidchkSeverity,
688 FIL__, __LINE__,
689 status,
690 MSG_SUID_QREPORT, msg,
691 tmp );
692 SH_FREE(tmp);
693 SH_FREE(msg);
694 cperm_status = -1;
695 }
696 }
697
698 if (cperm_status == 0)
699 {
700 if (retry_fstat(FIL__, __LINE__, file_d, &fileInfo_F) == -1)
701 {
702 status = errno;
703 msg = SH_ALLOC(SH_BUFSIZE);
704 tmp = sh_util_safe_name(fullpath);
705
706 (void) sl_snprintf(msg, SH_BUFSIZE,
707 _("I/O error. errno = %ld"), status);
708 sh_error_handle (ShSuidchkSeverity,
709 FIL__, __LINE__,
710 status,
711 MSG_SUID_QREPORT, msg,
712 tmp );
713 SH_FREE(tmp);
714 SH_FREE(msg);
715 cperm_status = -1;
716 }
717 }
718
719 if (cperm_status == 0)
720 {
721 if (fileInfo_F.st_ino != fileInfo.st_ino ||
722 fileInfo_F.st_dev != fileInfo.st_dev ||
723 fileInfo_F.st_mode != fileInfo.st_mode)
724 {
725 status = errno;
726 msg = SH_ALLOC(SH_BUFSIZE);
727 tmp = sh_util_safe_name(fullpath);
728
729 (void) sl_snprintf(msg, SH_BUFSIZE,
730 _("Race detected. errno = %ld"), status);
731 sh_error_handle (ShSuidchkSeverity,
732 FIL__, __LINE__,
733 status,
734 MSG_SUID_QREPORT, msg,
735 tmp );
736 SH_FREE(tmp);
737 SH_FREE(msg);
738 cperm_status = -1;
739 }
740 }
741
742 if ((fileInfo.st_mode & S_ISUID) > 0)
743 fileInfo.st_mode -= S_ISUID;
744 if ((fileInfo.st_mode & S_ISGID) > 0)
745 fileInfo.st_mode -= S_ISGID;
746
747 if (cperm_status == 0)
748 {
749 if (fchmod(file_d, fileInfo.st_mode) == -1)
750 {
751 status = errno;
752 msg = SH_ALLOC(SH_BUFSIZE);
753 tmp = sh_util_safe_name(fullpath);
754
755 (void) sl_snprintf(msg, SH_BUFSIZE,
756 _("Problem quarantining file. File NOT quarantined. errno = %ld"),
757 status);
758 sh_error_handle (ShSuidchkSeverity,
759 FIL__, __LINE__,
760 status,
761 MSG_SUID_QREPORT,
762 msg, tmp );
763 SH_FREE(tmp);
764 SH_FREE(msg);
765 }
766 else
767 {
768 tmp = sh_util_safe_name(fullpath);
769 sh_error_handle (ShSuidchkSeverity,
770 FIL__, __LINE__,
771 0,
772 MSG_SUID_QREPORT,
773 _("Quarantine method applied"),
774 tmp );
775 SH_FREE(tmp);
776 }
777 }
778
779 if (0 != (caperr = sl_drop_cap_qdel()))
780 {
781 sh_error_handle((-1), FIL__, __LINE__,
782 caperr, MSG_E_SUBGEN,
783 sh_error_message (caperr, errbuf, sizeof(errbuf)),
784 _("sl_drop_cap_qdel"));
785 }
786
787 if (file_d != -1)
788 {
789 do {
790 status = close (file_d);
791 } while (status == -1 && errno == EINTR);
792
793 if (-1 == status)
794 {
795 status = errno;
796 msg = SH_ALLOC(SH_BUFSIZE);
797 tmp = sh_util_safe_name(fullpath);
798
799 (void) sl_snprintf(msg, SH_BUFSIZE,
800 _("I/O error. errno = %ld"), status);
801 sh_error_handle (ShSuidchkSeverity,
802 FIL__, __LINE__,
803 status,
804 MSG_SUID_QREPORT, msg,
805 tmp );
806 SH_FREE(tmp);
807 SH_FREE(msg);
808 cperm_status = -1;
809 }
810 }
811 return;
812}
813
814static void report_file (const char * tmpcat, file_type * theFile,
815 char * timestrc, char * timestra, char * timestrm)
816{
817 char * msg = SH_ALLOC(SH_BUFSIZE);
818 char * tmp = sh_util_safe_name(tmpcat);
819
820 msg[0] = '\0';
821 /*@-usedef@*/
822
823#ifdef SH_USE_XML
824 (void) sl_snprintf(msg, SH_BUFSIZE, _("owner_new=\"%s\" iowner_new=\"%ld\" group_new=\"%s\" igroup_new=\"%ld\" size_new=\"%lu\" ctime_new=\"%s\" atime_new=\"%s\" mtime_new=\"%s\""),
825 theFile->c_owner, theFile->owner,
826 theFile->c_group, theFile->group,
827 (unsigned long) theFile->size,
828 timestrc, timestra, timestrm);
829#else
830 (void) sl_snprintf(msg, SH_BUFSIZE, _("owner_new=<%s>, iowner_new=<%ld>, group_new=<%s>, igroup_new=<%ld>, filesize=<%lu>, ctime=<%s>, atime=<%s>, mtime=<%s>"),
831 theFile->c_owner, theFile->owner,
832 theFile->c_group, theFile->group,
833 (unsigned long) theFile->size,
834 timestrc, timestra, timestrm);
835#endif
836 /*@+usedef@*/
837
838 sh_error_handle (ShSuidchkSeverity, FIL__, __LINE__,
839 0, MSG_SUID_POLICY,
840 _("suid/sgid file not in database"),
841 tmp, msg );
842 SH_FREE(tmp);
843 SH_FREE(msg);
844 return;
845}
846
847static
848int sh_suidchk_check_internal (char * iname)
849{
850 DIR * thisDir = NULL;
851 struct dirent * thisEntry;
852 char * tmpcat;
853 char * tmp;
854 char timestrc[32];
855 char timestra[32];
856 char timestrm[32];
857 struct stat buf;
858 int status;
859 int fflags;
860 char * fs;
861 long sl_status = SL_ENONE;
862 file_type theFile;
863 char fileHash[2*(KEY_LEN + 1)];
864
865 struct sh_dirent * dirlist = NULL;
866 struct sh_dirent * dirlist_orig = NULL;
867 char errbuf[SH_ERRBUF_SIZE];
868
869 SL_ENTER(_("sh_suidchk_check_internal"));
870
871 if (iname == NULL)
872 {
873 TPT((0, FIL__, __LINE__ , _("msg=<directory name is NULL>\n")));
874 SL_RETURN( (-1), _("sh_suidchk_check_internal"));
875 }
876
877 if (sig_urgent > 0) {
878 SL_RETURN( (0), _("sh_suidchk_check_internal"));
879 }
880
881 thisDir = opendir (iname);
882
883 if (thisDir == NULL)
884 {
885 status = errno;
886 tmp = sh_util_safe_name(iname);
887 sh_error_handle (ShDFLevel[SH_ERR_T_DIR], FIL__, __LINE__, status,
888 MSG_E_OPENDIR,
889 sh_error_message (status, errbuf, sizeof(errbuf)), tmp);
890 SH_FREE(tmp);
891 SL_RETURN( (-1), _("sh_suidchk_check_internal"));
892 }
893
894 /* Loop over directory entries
895 */
896 SH_MUTEX_LOCK(mutex_readdir);
897
898 do {
899
900 thisEntry = readdir (thisDir);
901
902 if (thisEntry != NULL) {
903
904 if (sl_strcmp (thisEntry->d_name, ".") == 0)
905 continue;
906
907 if (sl_strcmp (thisEntry->d_name, "..") == 0)
908 continue;
909
910 dirlist = addto_sh_dirlist (thisEntry, dirlist);
911 }
912
913 } while (thisEntry != NULL);
914
915 SH_MUTEX_UNLOCK(mutex_readdir);
916
917 closedir(thisDir);
918
919 dirlist_orig = dirlist;
920
921 do {
922
923 /* If the directory is empty, dirlist = NULL
924 */
925 if (!dirlist)
926 break;
927
928 if (sig_urgent > 0) {
929 SL_RETURN( (0), _("sh_suidchk_check_internal"));
930 }
931
932 tmpcat = SH_ALLOC(PATH_MAX);
933 (void) sl_strlcpy(tmpcat, iname, PATH_MAX);
934
935 if ((sl_strlen(tmpcat) != sl_strlen(iname)) || (tmpcat[0] == '\0'))
936 {
937 sl_status = SL_ETRUNC;
938 }
939 else
940 {
941 if (tmpcat[1] != '\0')
942 sl_status = sl_strlcat(tmpcat, "/", PATH_MAX);
943 }
944
945 if (! SL_ISERROR(sl_status))
946 sl_status = sl_strlcat(tmpcat, dirlist->sh_d_name, PATH_MAX);
947
948 if (SL_ISERROR(sl_status))
949 {
950 tmp = sh_util_safe_name(tmpcat);
951 sh_error_handle ((-1), FIL__, __LINE__, (int) sl_status,
952 MSG_E_SUBGPATH,
953 _("path too long"),
954 _("sh_suidchk_check_internal"), tmp );
955 SH_FREE(tmp);
956 dirlist = dirlist->next;
957 continue;
958 }
959
960 ++FileLimNum;
961 ++FileLimTotal;
962
963 /* Rate limit (Fps == Files per second)
964 */
965 if ((ShSuidchkFps > 0 && FileLimNum > ShSuidchkFps && FileLimTotal > 0)&&
966 (ShSuidchkYield == S_FALSE))
967 {
968 FileLimNum = 0;
969 FileLimNow = time(NULL);
970
971 if ( (FileLimNow - FileLimStart) > 0 &&
972 FileLimTotal/(FileLimNow - FileLimStart) > ShSuidchkFps )
973 (void) retry_msleep((int)((FileLimTotal/(FileLimNow-FileLimStart))/
974 ShSuidchkFps) , 0);
975 }
976
977 status = (int) retry_lstat(FIL__, __LINE__, tmpcat, &buf);
978
979 if (status != 0)
980 {
981 status = errno;
982 tmp = sh_util_safe_name(tmpcat);
983 sh_error_handle (SH_ERR_ERR, FIL__, __LINE__, status, MSG_ERR_LSTAT,
984 sh_error_message(status, errbuf, sizeof(errbuf)),
985 tmpcat );
986 SH_FREE(tmp);
987 }
988 else
989 {
990 if (/*@-usedef@*/S_ISDIR(buf.st_mode)/*@+usedef@*/ &&
991 (ShSuidchkExclude == NULL ||
992 0 != strcmp(tmpcat, ShSuidchkExclude)))
993 {
994 /* fs is a STATIC string or NULL
995 */
996 fs = filesystem_type (tmpcat, tmpcat, &buf);
997 if (fs != NULL
998#ifndef SH_SUIDTESTDIR
999 &&
1000 0 != strncmp (_("afs"), fs, 3) &&
1001 0 != strncmp (_("devfs"), fs, 5) &&
1002 0 != strncmp (_("iso9660"), fs, 7) &&
1003 0 != strncmp (_("lustre"), fs, 6) &&
1004 0 != strncmp (_("mmfs"), fs, 4) &&
1005 0 != strncmp (_("msdos"), fs, 5) &&
1006 0 != strncmp (_("nfs"), fs, 3) &&
1007 0 != strncmp (_("proc"), fs, 4) &&
1008 0 != strncmp (_("vfat"), fs, 4)
1009#endif
1010 )
1011 {
1012 if ((ShSuidchkNosuid == S_TRUE) ||
1013 (0 != strncmp (_("nosuid"), fs, 6)))
1014 /* fprintf(stderr, "%s: %s\n", fs, tmpcat); */
1015 (void) sh_suidchk_check_internal(tmpcat);
1016 }
1017 }
1018 else if (S_ISREG(buf.st_mode) &&
1019 (0 !=(S_ISUID & buf.st_mode) ||
1020#if defined(HOST_IS_LINUX)
1021 (0 !=(S_ISGID & buf.st_mode) &&
1022 0 !=(S_IXGRP & buf.st_mode))
1023#else
1024 0 !=(S_ISGID & buf.st_mode)
1025#endif
1026 )
1027 )
1028 {
1029
1030 (void) sl_strlcpy (theFile.fullpath, tmpcat, PATH_MAX);
1031 theFile.check_mask = sh_files_maskof(SH_LEVEL_READONLY);
1032 CLEAR_SH_FFLAG_REPORTED(theFile.file_reported);
1033 theFile.attr_string = NULL;
1034
1035 status = sh_unix_getinfo (ShDFLevel[SH_ERR_T_RO],
1036 dirlist->sh_d_name,
1037 &theFile, fileHash, 0);
1038
1039 tmp = sh_util_safe_name(tmpcat);
1040
1041 if (status != 0)
1042 {
1043 sh_error_handle (ShSuidchkSeverity, FIL__, __LINE__,
1044 0, MSG_E_SUBGPATH,
1045 _("Could not check suid/sgid file"),
1046 _("sh_suidchk_check_internal"),
1047 tmp);
1048 }
1049 else
1050 {
1051
1052 if ( sh.flag.update == S_TRUE &&
1053 (sh.flag.checkSum == SH_CHECK_INIT ||
1054 sh.flag.checkSum == SH_CHECK_CHECK))
1055 {
1056 /* Updating database. Report new files that
1057 * are not in database already. Then compare
1058 * to database and report changes.
1059 */
1060 if (-1 == sh_hash_have_it (tmpcat))
1061 {
1062 sh_error_handle ((-1), FIL__, __LINE__,
1063 0, MSG_SUID_FOUND, tmp );
1064 }
1065 else
1066 {
1067 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__,
1068 0, MSG_SUID_FOUND, tmp );
1069 }
1070
1071 if (0 == sh_hash_compdata (SH_LEVEL_READONLY,
1072 &theFile, fileHash,
1073 _("[SuidCheck]"),
1074 ShSuidchkSeverity))
1075 {
1076 sh_hash_pushdata_memory (&theFile, fileHash);
1077 }
1078
1079 sh_hash_addflag(tmpcat, SH_FFLAG_SUIDCHK);
1080
1081 }
1082
1083 else if (sh.flag.checkSum == SH_CHECK_INIT &&
1084 sh.flag.update == S_FALSE )
1085 {
1086 /* Running init. Report on files detected.
1087 */
1088 sh_hash_pushdata (&theFile, fileHash);
1089 sh_error_handle ((-1), FIL__, __LINE__,
1090 0, MSG_SUID_FOUND, tmp );
1091 }
1092
1093 else if (sh.flag.checkSum == SH_CHECK_CHECK )
1094 {
1095 /* Running file check. Report on new files
1096 * detected, and quarantine them.
1097 */
1098 sh_error_handle (SH_ERR_ALL, FIL__, __LINE__,
1099 0, MSG_SUID_FOUND, tmp );
1100
1101 fflags = sh_hash_getflags(tmpcat);
1102
1103 if ( (-1 == fflags) || (!SH_FFLAG_SUIDCHK_SET(fflags)))
1104 {
1105 if (-1 == fflags)
1106 {
1107 (void) sh_unix_gmttime (theFile.ctime, timestrc, sizeof(timestrc));
1108 (void) sh_unix_gmttime (theFile.atime, timestra, sizeof(timestra));
1109 (void) sh_unix_gmttime (theFile.mtime, timestrm, sizeof(timestrm));
1110
1111 report_file(tmpcat, &theFile, timestrc, timestra, timestrm);
1112 }
1113 /* Quarantine file according to configured method
1114 */
1115 if (ShSuidchkQEnable == S_TRUE)
1116 {
1117 switch (ShSuidchkQMethod)
1118 {
1119 case SH_Q_DELETE:
1120 sh_q_delete(theFile.fullpath);
1121 break;
1122 case SH_Q_CHANGEPERM:
1123 sh_q_changeperm(theFile.fullpath);
1124 break;
1125 case SH_Q_MOVE:
1126 sh_q_move(theFile.fullpath, &theFile, timestrc, timestra, timestrm);
1127 break;
1128 default:
1129 sh_error_handle (ShSuidchkSeverity, FIL__,
1130 __LINE__, 0, MSG_SUID_QREPORT,
1131 _("Bad quarantine method"), tmp);
1132 break;
1133 }
1134 }
1135 else
1136 {
1137 /* 1.8.1 push file to in-memory database
1138 */
1139 (void) sh_hash_compdata (SH_LEVEL_READONLY,
1140 &theFile, fileHash,
1141 _("[SuidCheck]"),
1142 ShSuidchkSeverity);
1143
1144 sh_hash_addflag(tmpcat, SH_FFLAG_SUIDCHK);
1145
1146 }
1147 }
1148 else
1149 {
1150 /* File exists. Check for modifications.
1151 */
1152 (void) sh_hash_compdata (SH_LEVEL_READONLY,
1153 &theFile, fileHash,
1154 _("[SuidCheck]"),
1155 ShSuidchkSeverity);
1156
1157 sh_hash_addflag(tmpcat, SH_FFLAG_SUIDCHK);
1158
1159 }
1160 }
1161 }
1162 SH_FREE(tmp);
1163 if (theFile.attr_string)
1164 SH_FREE(theFile.attr_string);
1165 }
1166 }
1167 SH_FREE(tmpcat);
1168
1169
1170#ifdef HAVE_SCHED_YIELD
1171 if (ShSuidchkYield == S_TRUE)
1172 {
1173 if (sched_yield() == -1)
1174 {
1175 status = errno;
1176 sh_error_handle ((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
1177 _("Failed to release time slice"),
1178 _("sh_suidchk_check_internal") );
1179 }
1180 }
1181#endif
1182
1183 dirlist = dirlist->next;
1184
1185 } while (dirlist != NULL);
1186
1187
1188 kill_sh_dirlist (dirlist_orig);
1189
1190 SL_RETURN( (0), _("sh_suidchk_check_internal"));
1191}
1192
1193/*************
1194 *
1195 * module init
1196 *
1197 *************/
1198int sh_suidchk_init (struct mod_type * arg)
1199{
1200 (void) arg;
1201 if (ShSuidchkActive == S_FALSE)
1202 return (-1);
1203
1204 return (0);
1205}
1206
1207
1208/*************
1209 *
1210 * module cleanup
1211 *
1212 *************/
1213int sh_suidchk_end ()
1214{
1215 return (0);
1216}
1217
1218
1219/*************
1220 *
1221 * module timer
1222 *
1223 *************/
1224int sh_suidchk_timer (time_t tcurrent)
1225{
1226 if (sh.flag.checkSum == SH_CHECK_INIT)
1227 return -1;
1228
1229 /* One-shot (not daemon and not loop forever)
1230 */
1231 if (sh.flag.isdaemon != S_TRUE && sh.flag.loop == S_FALSE)
1232 return -1;
1233
1234 if (ShSuidchkSched != NULL)
1235 {
1236 return test_sched(ShSuidchkSched);
1237 }
1238 if ((time_t) (tcurrent - lastcheck) >= ShSuidchkInterval)
1239 {
1240 lastcheck = tcurrent;
1241 return (-1);
1242 }
1243 return 0;
1244}
1245
1246/*************
1247 *
1248 * module check
1249 *
1250 *************/
1251
1252int sh_suidchk_check ()
1253{
1254 int status;
1255
1256 SL_ENTER(_("sh_suidchk_check"));
1257
1258 sh_error_handle (SH_ERR_NOTICE, FIL__, __LINE__, EINVAL, MSG_E_SUBGEN,
1259 _("Checking for SUID programs"),
1260 _("suidchk_check") );
1261
1262 FileLimNow = time(NULL);
1263 FileLimStart = FileLimNow;
1264 FileLimNum = 0;
1265 FileLimTotal = 0;
1266
1267#ifdef SH_SUIDTESTDIR
1268 status = sh_suidchk_check_internal (SH_SUIDTESTDIR);
1269#else
1270 status = sh_suidchk_check_internal ("/");
1271#endif
1272
1273 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_SUID_SUMMARY,
1274 FileLimTotal,
1275 (long) (time(NULL) - FileLimStart) );
1276
1277 SL_RETURN(status, _("sh_suidchk_check"));
1278}
1279
1280/*************
1281 *
1282 * module setup
1283 *
1284 *************/
1285
1286int sh_suidchk_set_severity (const char * c)
1287{
1288 int retval;
1289 char tmp[32];
1290
1291 SL_ENTER(_("sh_suidchk_set_severity"));
1292 tmp[0] = '='; tmp[1] = '\0';
1293 (void) sl_strlcat (tmp, c, 32);
1294 retval = sh_error_set_level (tmp, &ShSuidchkSeverity);
1295 SL_RETURN(retval, _("sh_suidchk_set_severity"));
1296}
1297
1298int sh_suidchk_set_exclude (const char * c)
1299{
1300 SL_ENTER(_("sh_suidchk_set_exclude"));
1301
1302 if (c == NULL || c[0] == '\0')
1303 {
1304 SL_RETURN(-1, _("sh_suidchk_set_exclude"));
1305 }
1306
1307 if (0 == sl_strncmp(c, _("NULL"), 4))
1308 {
1309 if (ShSuidchkExclude != NULL)
1310 SH_FREE(ShSuidchkExclude);
1311 ShSuidchkExclude = NULL;
1312 SL_RETURN(0, _("sh_suidchk_set_exclude"));
1313 }
1314
1315 if (ShSuidchkExclude != NULL)
1316 SH_FREE(ShSuidchkExclude);
1317
1318 ShSuidchkExclude = sh_util_strdup (c);
1319 ExcludeLen = sl_strlen (ShSuidchkExclude);
1320 if (ShSuidchkExclude[ExcludeLen-1] == '/')
1321 {
1322 ShSuidchkExclude[ExcludeLen-1] = '\0';
1323 ExcludeLen--;
1324 }
1325 SL_RETURN(0, _("sh_suidchk_set_exclude"));
1326}
1327
1328int sh_suidchk_set_timer (const char * c)
1329{
1330 long val;
1331
1332 SL_ENTER(_("sh_suidchk_set_timer"));
1333
1334 val = strtol (c, (char **)NULL, 10);
1335 if (val <= 0)
1336 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1337 _("suidchk timer"), c);
1338
1339 val = (val <= 0 ? 7200 : val);
1340
1341 ShSuidchkInterval = (time_t) val;
1342 SL_RETURN( 0, _("sh_suidchk_set_timer"));
1343}
1344
1345
1346static void sh_suidchk_free_schedule ()
1347{
1348 sh_schedule_t * current = ShSuidchkSched;
1349 sh_schedule_t * next = NULL;
1350
1351 while (current != NULL)
1352 {
1353 next = current->next;
1354 SH_FREE(current);
1355 current = next;
1356 }
1357 ShSuidchkSched = NULL;
1358 return;
1359}
1360
1361int sh_suidchk_reconf ()
1362{
1363 sh_suidchk_free_schedule();
1364 set_defaults();
1365 return 0;
1366}
1367
1368int sh_suidchk_set_schedule (const char * str)
1369{
1370 int status;
1371 sh_schedule_t * newSched = NULL;
1372
1373 SL_ENTER(_("sh_suidchk_set_schedule"));
1374
1375 /*
1376 if (ShSuidchkSched != NULL)
1377 {
1378 SH_FREE(ShSuidchkSched);
1379 ShSuidchkSched = NULL;
1380 }
1381 */
1382
1383 if (0 == sl_strncmp(str, _("NULL"), 4))
1384 {
1385 (void) sh_suidchk_free_schedule ();
1386 return 0;
1387 }
1388
1389 newSched = SH_ALLOC(sizeof(sh_schedule_t));
1390 status = create_sched(str, newSched);
1391 if (status != 0)
1392 {
1393 SH_FREE(newSched);
1394 newSched = NULL;
1395 }
1396 else
1397 {
1398 newSched->next = ShSuidchkSched;
1399 ShSuidchkSched = newSched;
1400 }
1401 SL_RETURN( status, _("sh_suidchk_set_schedule"));
1402}
1403
1404
1405
1406int sh_suidchk_set_fps (const char * c)
1407{
1408 long val;
1409
1410 SL_ENTER(_("sh_suidchk_set_fps"));
1411
1412 val = strtol (c, (char **)NULL, 10);
1413 if (val < 0)
1414 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1415 _("suidchk fps"), c);
1416
1417 val = (val < 0 ? 0 : val);
1418
1419 ShSuidchkFps = val;
1420 SL_RETURN( 0, _("sh_suidchk_set_fps"));
1421}
1422
1423int sh_suidchk_set_yield (const char * c)
1424{
1425 int i;
1426 SL_ENTER(_("sh_suidchk_set_yield"));
1427#ifdef HAVE_SCHED_YIELD
1428 i = sh_util_flagval(c, &ShSuidchkYield);
1429#else
1430 (void) c; /* cast to void to avoid compiler warning */
1431 i = -1;
1432#endif
1433 SL_RETURN(i, _("sh_suidchk_set_yield"));
1434}
1435
1436int sh_suidchk_set_activate (const char * c)
1437{
1438 int i;
1439 SL_ENTER(_("sh_suidchk_set_activate"));
1440 i = sh_util_flagval(c, &ShSuidchkActive);
1441 SL_RETURN(i, _("sh_suidchk_set_activate"));
1442}
1443
1444int sh_suidchk_set_nosuid (const char * c)
1445{
1446 int i;
1447 SL_ENTER(_("sh_suidchk_set_nosuid"));
1448 i = sh_util_flagval(c, &ShSuidchkNosuid);
1449 SL_RETURN(i, _("sh_suidchk_set_nosuid"));
1450}
1451
1452int sh_suidchk_set_quarantine (const char * c)
1453{
1454 int i;
1455 SL_ENTER(_("sh_suidchk_set_quarantine"));
1456 i = sh_util_flagval(c, &ShSuidchkQEnable);
1457 SL_RETURN(i, _("sh_suidchk_set_quarantine"));
1458}
1459
1460int sh_suidchk_set_qdelete (const char * c)
1461{
1462 int i;
1463 SL_ENTER(_("sh_suidchk_set_qdelete"));
1464 i = sh_util_flagval(c, &ShSuidchkQDelete);
1465 SL_RETURN(i, _("sh_suidchk_set_qdelete"));
1466}
1467
1468int sh_suidchk_set_qmethod (const char * c)
1469{
1470 long val;
1471 int ret = 0;
1472 struct stat buf;
1473
1474 SL_ENTER(_("sh_suidchk_set_qmethod"));
1475
1476 val = strtol (c, (char **)NULL, 10);
1477 if (val < 0)
1478 {
1479 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1480 _("suidchk qmethod"), c);
1481 ret = -1;
1482 }
1483 else
1484 {
1485 switch (val)
1486 {
1487 case SH_Q_DELETE:
1488 ShSuidchkQMethod = SH_Q_DELETE;
1489 break;
1490 case SH_Q_CHANGEPERM:
1491 ShSuidchkQMethod = SH_Q_CHANGEPERM;
1492 break;
1493 case SH_Q_MOVE:
1494 if (retry_stat (FIL__, __LINE__, DEFAULT_QDIR, &buf) != 0)
1495 {
1496 if (mkdir (DEFAULT_QDIR, 0750) == -1)
1497 {
1498 sh_error_handle ((-1), FIL__, __LINE__, EINVAL,
1499 MSG_SUID_ERROR,
1500 _("Unable to create quarantine directory"));
1501 }
1502 }
1503 ShSuidchkQMethod = SH_Q_MOVE;
1504 break;
1505 default:
1506 sh_error_handle ((-1), FIL__, __LINE__, EINVAL, MSG_EINVALS,
1507 _("suidchk qmethod"), c);
1508 ShSuidchkQMethod = -1;
1509 ret = -1;
1510 break;
1511 }
1512 }
1513
1514 SL_RETURN( ret, _("sh_suidchk_set_qmethod"));
1515}
1516
1517#if defined(FSTYPE_STATFS) || defined(FSTYPE_AIX_STATFS)
1518/* dirname.c -- return all but the last element in a path
1519 Copyright (C) 1990 Free Software Foundation, Inc.
1520
1521 This program is free software; you can redistribute it and/or modify
1522 it under the terms of the GNU General Public License as published by
1523 the Free Software Foundation; either version 2, or (at your option)
1524 any later version.
1525
1526 This program is distributed in the hope that it will be useful,
1527 but WITHOUT ANY WARRANTY; without even the implied warranty of
1528 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1529 GNU General Public License for more details.
1530
1531 You should have received a copy of the GNU General Public License
1532 along with this program; if not, write to the Free Software Foundation,
1533 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
1534
1535/* Return the leading directories part of PATH,
1536 allocated with malloc. If out of memory, return 0.
1537 Assumes that trailing slashes have already been
1538 removed. */
1539
1540char * sh_dirname (const char * path)
1541{
1542 char *newpath;
1543 char *slash;
1544 int length; /* Length of result, not including NUL. */
1545
1546 slash = strrchr (path, '/');
1547 if (slash == NULL)
1548 {
1549 /* File is in the current directory. */
1550 path = ".";
1551 length = 1;
1552 }
1553 else
1554 {
1555 /* Remove any trailing slashes from the result. */
1556 while (slash > path && *slash == '/')
1557 --slash;
1558
1559 length = slash - path + 1;
1560 }
1561 newpath = (char *) SH_ALLOC (length + 1);
1562 if (newpath == NULL)
1563 return NULL;
1564 strncpy (newpath, path, length);
1565 newpath[length] = '\0';
1566 return newpath;
1567}
1568/* #ifdef FSTYPE_STATFS */
1569#endif
1570
1571/* fstype.c -- determine type of filesystems that files are on
1572 Copyright (C) 1990, 91, 92, 93, 94 Free Software Foundation, Inc.
1573
1574 This program is free software; you can redistribute it and/or modify
1575 it under the terms of the GNU General Public License as published by
1576 the Free Software Foundation; either version 2, or (at your option)
1577 any later version.
1578
1579 This program is distributed in the hope that it will be useful,
1580 but WITHOUT ANY WARRANTY; without even the implied warranty of
1581 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1582 GNU General Public License for more details.
1583
1584 You should have received a copy of the GNU General Public License
1585 along with this program; if not, write to the Free Software
1586 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
1587
1588/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
1589
1590/* Modified by R. Wichmann:
1591 - replaced error() by sh_error_handle()
1592 - replaced xstrdup() by sl_strdup()
1593 - replaced strstr() by sl_strstr()
1594 - some additions to recognize nosuid fs
1595*/
1596
1597/* modetype.h -- file type bits definitions for POSIX systems
1598 Requires sys/types.h sys/stat.h.
1599 Copyright (C) 1990 Free Software Foundation, Inc.
1600
1601 This program is free software; you can redistribute it and/or modify
1602 it under the terms of the GNU General Public License as published by
1603 the Free Software Foundation; either version 2, or (at your option)
1604 any later version.
1605
1606 This program is distributed in the hope that it will be useful,
1607 but WITHOUT ANY WARRANTY; without even the implied warranty of
1608 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1609 GNU General Public License for more details.
1610
1611 You should have received a copy of the GNU General Public License
1612 along with this program; if not, write to the Free Software
1613 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
1614
1615/* POSIX.1 doesn't mention the S_IFMT bits; instead, it uses S_IStype
1616 test macros. To make storing file types more convenient, define
1617 them; the values don't need to correspond to what the kernel uses,
1618 because of the way we use them. */
1619#ifndef S_IFMT /* Doesn't have traditional Unix macros. */
1620#define S_IFBLK 1
1621#define S_IFCHR 2
1622#define S_IFDIR 4
1623#define S_IFREG 8
1624#ifdef S_ISLNK
1625#define S_IFLNK 16
1626#endif
1627#ifdef S_ISFIFO
1628#define S_IFIFO 32
1629#endif
1630#ifdef S_ISSOCK
1631#define S_IFSOCK 64
1632#endif
1633#endif /* !S_IFMT */
1634
1635#ifdef STAT_MACROS_BROKEN
1636#undef S_ISBLK
1637#undef S_ISCHR
1638#undef S_ISDIR
1639#undef S_ISREG
1640#undef S_ISFIFO
1641#undef S_ISLNK
1642#undef S_ISSOCK
1643#undef S_ISMPB
1644#undef S_ISMPC
1645#undef S_ISNWK
1646#endif
1647
1648/* Do the reverse: define the POSIX.1 macros for traditional Unix systems
1649 that don't have them. */
1650#if !defined(S_ISBLK) && defined(S_IFBLK)
1651#define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
1652#endif
1653#if !defined(S_ISCHR) && defined(S_IFCHR)
1654#define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
1655#endif
1656#if !defined(S_ISDIR) && defined(S_IFDIR)
1657#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
1658#endif
1659#if !defined(S_ISREG) && defined(S_IFREG)
1660#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
1661#endif
1662#if !defined(S_ISFIFO) && defined(S_IFIFO)
1663#define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
1664#endif
1665#if !defined(S_ISLNK) && defined(S_IFLNK)
1666#define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
1667#endif
1668#if !defined(S_ISSOCK) && defined(S_IFSOCK)
1669#define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
1670#endif
1671#if !defined(S_ISMPB) && defined(S_IFMPB) /* V7 */
1672#define S_ISMPB(m) (((m) & S_IFMT) == S_IFMPB)
1673#define S_ISMPC(m) (((m) & S_IFMT) == S_IFMPC)
1674#endif
1675#if !defined(S_ISNWK) && defined(S_IFNWK) /* HP/UX */
1676#define S_ISNWK(m) (((m) & S_IFMT) == S_IFNWK)
1677#endif
1678
1679
1680static char *filesystem_type_uncached (char *path, char *relpath,
1681 struct stat *statp);
1682
1683#ifdef FSTYPE_MNTENT /* 4.3BSD etc. */
1684static int xatoi (char *cp);
1685#endif
1686
1687#ifdef FSTYPE_MNTENT /* 4.3BSD, SunOS, HP-UX, Dynix, Irix. */
1688#include <mntent.h>
1689#if !defined(MOUNTED)
1690# if defined(MNT_MNTTAB) /* HP-UX. */
1691# define MOUNTED MNT_MNTTAB
1692# endif
1693# if defined(MNTTABNAME) /* Dynix. */
1694# define MOUNTED MNTTABNAME
1695# endif
1696#endif
1697#endif
1698
1699#ifdef FSTYPE_GETMNT /* Ultrix. */
1700#include <sys/param.h>
1701#include <sys/mount.h>
1702#include <sys/fs_types.h>
1703#endif
1704
1705#ifdef FSTYPE_USG_STATFS /* SVR3. */
1706#include <sys/statfs.h>
1707#include <sys/fstyp.h>
1708#endif
1709
1710#ifdef FSTYPE_STATVFS /* SVR4. */
1711#include <sys/statvfs.h>
1712#include <sys/fstyp.h>
1713#endif
1714
1715#ifdef FSTYPE_STATFS /* 4.4BSD. */
1716#include <sys/param.h> /* NetBSD needs this. */
1717#include <sys/mount.h>
1718
1719#ifndef MFSNAMELEN /* NetBSD defines this. */
1720static char *
1721fstype_to_string (t)
1722 short t;
1723{
1724#ifdef INITMOUNTNAMES /* Defined in 4.4BSD, not in NET/2. */
1725 static char *mn[] = INITMOUNTNAMES;
1726 if (t >= 0 && t <= MOUNT_MAXTYPE)
1727 return mn[t];
1728 else
1729 return "?";
1730#else /* !INITMOUNTNAMES */
1731 switch (t)
1732 {
1733 case MOUNT_UFS:
1734 return _("ufs");
1735 case MOUNT_NFS:
1736 return _("nfs");
1737#ifdef MOUNT_PC
1738 case MOUNT_PC:
1739 return _("pc");
1740#endif
1741#ifdef MOUNT_MFS
1742 case MOUNT_MFS:
1743 return _("mfs");
1744#endif
1745#ifdef MOUNT_LO
1746 case MOUNT_LO:
1747 return _("lofs");
1748#endif
1749#ifdef MOUNT_TFS
1750 case MOUNT_TFS:
1751 return _("tfs");
1752#endif
1753#ifdef MOUNT_TMP
1754 case MOUNT_TMP:
1755 return _("tmp");
1756#endif
1757#ifdef MOUNT_MSDOS
1758 case MOUNT_MSDOS:
1759 return _("msdos");
1760#endif
1761#ifdef MOUNT_ISO9660
1762 case MOUNT_ISO9660:
1763 return _("iso9660fs");
1764#endif
1765 default:
1766 return "?";
1767 }
1768#endif /* !INITMOUNTNAMES */
1769}
1770#endif /* !MFSNAMELEN */
1771#endif /* FSTYPE_STATFS */
1772
1773#ifdef FSTYPE_AIX_STATFS /* AIX. */
1774#include <sys/vmount.h>
1775#include <sys/statfs.h>
1776
1777#define FSTYPE_STATFS /* Otherwise like 4.4BSD. */
1778#define f_type f_vfstype
1779
1780static char *
1781fstype_to_string (t)
1782 short t;
1783{
1784 switch (t)
1785 {
1786 case MNT_AIX:
1787 return _("aix"); /* AIX 4.3: NFS filesystems are actually MNT_AIX. */
1788#ifdef MNT_NAMEFS
1789 case MNT_NAMEFS:
1790 return _("namefs");
1791#endif
1792 case MNT_NFS:
1793 return _("nfs");
1794 case MNT_JFS:
1795 return _("jfs");
1796 case MNT_CDROM:
1797 return _("cdrom");
1798#ifdef MNT_PROCFS
1799 case MNT_PROCFS:
1800 return _("procfs");
1801#endif
1802#ifdef MNT_SFS
1803 case MNT_SFS:
1804 return _("sfs");
1805#endif
1806#ifdef MNT_CACHEFS
1807 case MNT_CACHEFS:
1808 return _("cachefs");
1809#endif
1810#ifdef MNT_NFS3
1811 case MNT_NFS3:
1812 return _("nfs3");
1813#endif
1814#ifdef MNT_AUTOFS
1815 case MNT_AUTOFS:
1816 return _("autofs");
1817#endif
1818#ifdef MNT_VXFS
1819 case MNT_VXFS:
1820 return _("vxfs");
1821#endif
1822#ifdef MNT_VXODM
1823 case MNT_VXODM:
1824 return _("veritasfs");
1825#endif
1826#ifdef MNT_UDF
1827 case MNT_UDF:
1828 return _("udfs");
1829#endif
1830#ifdef MNT_NFS4
1831 case MNT_NFS4:
1832 return _("nfs4");
1833#endif
1834#ifdef MNT_RFS4
1835 case MNT_RFS4:
1836 return _("nfs4");
1837#endif
1838#ifdef MNT_CIFS
1839 case MNT_CIFS:
1840 return _("cifs");
1841#endif
1842 default:
1843 return "?";
1844 }
1845}
1846#endif /* FSTYPE_AIX_STATFS */
1847
1848#ifdef AFS
1849#include <netinet/in.h>
1850#include <afs/venus.h>
1851#if __STDC__
1852/* On SunOS 4, afs/vice.h defines this to rely on a pre-ANSI cpp. */
1853#undef _VICEIOCTL
1854#define _VICEIOCTL(id) ((unsigned int ) _IOW('V', id, struct ViceIoctl))
1855#endif
1856#ifndef _IOW
1857/* AFS on Solaris 2.3 doesn't get this definition. */
1858#include <sys/ioccom.h>
1859#endif
1860
1861static int
1862in_afs (path)
1863 char *path;
1864{
1865 static char space[2048];
1866 struct ViceIoctl vi;
1867
1868 vi.in_size = 0;
1869 vi.out_size = sizeof (space);
1870 vi.out = space;
1871
1872 if (pioctl (path, VIOC_FILE_CELL_NAME, &vi, 1)
1873 && (errno == EINVAL || errno == ENOENT))
1874 return 0;
1875 return 1;
1876}
1877#endif /* AFS */
1878
1879/* Nonzero if the current filesystem's type is known. */
1880static int fstype_known = 0;
1881
1882/* Return a static string naming the type of filesystem that the file PATH,
1883 described by STATP, is on.
1884 RELPATH is the file name relative to the current directory.
1885 Return "unknown" if its filesystem type is unknown. */
1886
1887static char *
1888filesystem_type (char * path, char * relpath, struct stat * statp)
1889{
1890 static char *current_fstype = NULL;
1891 static dev_t current_dev;
1892
1893 if (current_fstype != NULL)
1894 {
1895 if ((0 != fstype_known) && statp->st_dev == current_dev)
1896 return current_fstype; /* Cached value. */
1897 SH_FREE (current_fstype);
1898 }
1899 current_dev = statp->st_dev;
1900 current_fstype = filesystem_type_uncached (path, relpath, statp);
1901 return current_fstype;
1902}
1903
1904/* Return a newly allocated string naming the type of filesystem that the
1905 file PATH, described by STATP, is on.
1906 RELPATH is the file name relative to the current directory.
1907 Return "unknown" if its filesystem type is unknown. */
1908
1909static char *
1910filesystem_type_uncached (path, relpath, statp)
1911 char *path;
1912 char *relpath;
1913 struct stat *statp;
1914{
1915 char * type = NULL;
1916#ifdef MFSNAMELEN /* NetBSD. */
1917 static char my_tmp_type[64];
1918#endif
1919
1920#ifdef FSTYPE_MNTENT /* 4.3BSD, SunOS, HP-UX, Dynix, Irix. */
1921 char *table = MOUNTED;
1922 FILE *mfp;
1923 struct mntent *mnt;
1924
1925 if (path == NULL || relpath == NULL)
1926 return NULL;
1927
1928 mfp = setmntent (table, "r");
1929 if (mfp == NULL)
1930 {
1931 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_SUBGEN,
1932 _("setmntent() failed"),
1933 _("filesystem_type_uncached") );
1934 return NULL;
1935 }
1936
1937 /* Find the entry with the same device number as STATP, and return
1938 that entry's fstype. */
1939 while (type == NULL && (mnt = getmntent (mfp)) != NULL)
1940 {
1941 char *devopt;
1942 dev_t dev;
1943 struct stat disk_stats;
1944
1945#ifdef MNTTYPE_IGNORE
1946 if (0 == strcmp (mnt->mnt_type, MNTTYPE_IGNORE))
1947 continue;
1948#endif
1949
1950 /* Newer systems like SunOS 4.1 keep the dev number in the mtab,
1951 in the options string. For older systems, we need to stat the
1952 directory that the filesystem is mounted on to get it.
1953
1954 Unfortunately, the HPUX 9.x mnttab entries created by automountq
1955 contain a dev= option but the option value does not match the
1956 st_dev value of the file (maybe the lower 16 bits match?). */
1957
1958#if !defined(hpux) && !defined(__hpux__)
1959 devopt = sl_strstr (mnt->mnt_opts, "dev=");
1960 if (devopt)
1961 {
1962 if (devopt[4] == '0' && (devopt[5] == 'x' || devopt[5] == 'X'))
1963 dev = (dev_t) xatoi (devopt + 6);
1964 else
1965 dev = (dev_t) xatoi (devopt + 4);
1966 }
1967 else
1968#endif /* not hpux */
1969 {
1970 if (stat (mnt->mnt_dir, &disk_stats) == -1)
1971 {
1972 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_SUBGEN,
1973 _("stat() failed"),
1974 _("filesystem_type_uncached") );
1975 return NULL;
1976 }
1977 dev = disk_stats.st_dev;
1978 }
1979
1980 if (dev == statp->st_dev)
1981 {
1982 /* check for the "nosuid" option
1983 */
1984#ifdef HAVE_HASMNTOPT
1985 if (NULL == hasmntopt(mnt, "nosuid") || (ShSuidchkNosuid == S_TRUE))
1986 type = mnt->mnt_type;
1987 else
1988 type = _("nosuid"); /* hasmntopt (nosuid) */
1989#else
1990 type = mnt->mnt_type;
1991#endif
1992 }
1993 }
1994
1995 if (endmntent (mfp) == 0)
1996 {
1997 sh_error_handle ((-1), FIL__, __LINE__, 0, MSG_E_SUBGEN,
1998 _("endmntent() failed"),
1999 _("filesystem_type_uncached") );
2000 }
2001#endif
2002
2003#ifdef FSTYPE_GETMNT /* Ultrix. */
2004 int offset = 0;
2005 struct fs_data fsd;
2006
2007 if (path == NULL || relpath == NULL)
2008 return NULL;
2009
2010 while (type == NULL
2011 && getmnt (&offset, &fsd, sizeof (fsd), NOSTAT_MANY, 0) > 0)
2012 {
2013 if (fsd.fd_req.dev == statp->st_dev)
2014 type = gt_names[fsd.fd_req.fstype];
2015 }
2016#endif
2017
2018#ifdef FSTYPE_USG_STATFS /* SVR3. */
2019 struct statfs fss;
2020 char typebuf[FSTYPSZ];
2021
2022 if (path == NULL || relpath == NULL)
2023 return NULL;
2024
2025 if (statfs (relpath, &fss, sizeof (struct statfs), 0) == -1)
2026 {
2027 /* Don't die if a file was just removed. */
2028 if (errno != ENOENT)
2029 {
2030 sh_error_handle ((-1), FIL__, __LINE__, errno, MSG_E_SUBGEN,
2031 _("statfs() failed"),
2032 _("filesystem_type_uncached") );
2033 return NULL;
2034 }
2035 }
2036 else if (!sysfs (GETFSTYP, fss.f_fstyp, typebuf))
2037 type = typebuf;
2038#endif
2039
2040#ifdef FSTYPE_STATVFS /* SVR4. */
2041 struct statvfs fss;
2042
2043 if (path == NULL || relpath == NULL)
2044 return NULL;
2045
2046 if (statvfs (relpath, &fss) == -1)
2047 {
2048 /* Don't die if a file was just removed. */
2049 if (errno != ENOENT)
2050 {
2051 sh_error_handle ((-1), FIL__, __LINE__, errno, MSG_E_SUBGEN,
2052 _("statvfs() failed"),
2053 _("filesystem_type_uncached") );
2054 return NULL;
2055 }
2056 }
2057 else
2058 {
2059 type = fss.f_basetype;
2060
2061 /* patch by Konstantin Khrooschev <nathoo@co.ru>
2062 */
2063 if( (fss.f_flag & ST_NOSUID) && (ShSuidchkNosuid == S_FALSE))
2064 type = _("nosuid");
2065 }
2066 (void) statp; /* fix compiler warning */
2067#endif
2068
2069#ifdef FSTYPE_STATFS /* 4.4BSD. */
2070 struct statfs fss;
2071 char *p;
2072#if defined(MNT_VISFLAGMASK) && defined(HAVE_STRUCT_STATFS_F_FLAGS)
2073 int flags;
2074#endif
2075 /* char * sh_dirname(const char *path); */
2076
2077 if (path == NULL || relpath == NULL)
2078 return NULL;
2079
2080 if (S_ISLNK (statp->st_mode))
2081 p = sh_dirname (relpath);
2082 else
2083 p = relpath;
2084
2085 if (statfs (p, &fss) == -1)
2086 {
2087 /* Don't die if symlink to nonexisting file, or a file that was
2088 just removed. */
2089 if (errno != ENOENT)
2090 {
2091 sh_error_handle ((-1), FIL__, __LINE__, errno, MSG_E_SUBGEN,
2092 _("statfs() failed"),
2093 _("filesystem_type_uncached") );
2094 return NULL;
2095 }
2096 }
2097 else
2098 {
2099
2100#ifdef MFSNAMELEN /* NetBSD. */
2101 /* MEMORY LEAK !!!
2102 * type = sh_util_strdup (fss.f_fstypename);
2103 */
2104 sl_strlcpy (my_tmp_type, fss.f_fstypename, 64);
2105 type = my_tmp_type;
2106#else
2107 type = fstype_to_string (fss.f_type);
2108#endif
2109
2110#ifdef HAVE_STRUCT_STATFS_F_FLAGS
2111#ifdef MNT_VISFLAGMASK
2112 flags = fss.f_flags & MNT_VISFLAGMASK;
2113 if ((flags & MNT_NOSUID) && (ShSuidchkNosuid == S_FALSE))
2114#else
2115 if ((fss.f_flags & MNT_NOSUID) && (ShSuidchkNosuid == S_FALSE))
2116#endif
2117 type = _("nosuid");
2118#endif
2119 }
2120 if (p != relpath)
2121 SH_FREE (p);
2122#endif
2123
2124#ifdef AFS
2125 if ((!type || !strcmp (type, "xx")) && in_afs (relpath))
2126 type = "afs";
2127#endif
2128
2129 /* An unknown value can be caused by an ENOENT error condition.
2130 Don't cache those values. */
2131 fstype_known = (int)(type != NULL);
2132
2133 return sh_util_strdup (type ? type : "unknown");
2134}
2135
2136#ifdef FSTYPE_MNTENT /* 4.3BSD etc. */
2137/* Return the value of the hexadecimal number represented by CP.
2138 No prefix (like '0x') or suffix (like 'h') is expected to be
2139 part of CP. */
2140
2141static int
2142xatoi (cp)
2143 char *cp;
2144{
2145 int val;
2146
2147 val = 0;
2148 while (*cp != '\0')
2149 {
2150 /*@+charint@*/
2151 if (*cp >= 'a' && *cp <= 'f')
2152 val = val * 16 + *cp - 'a' + 10;
2153 else if (*cp >= 'A' && *cp <= 'F')
2154 val = val * 16 + *cp - 'A' + 10;
2155 else if (*cp >= '0' && *cp <= '9')
2156 val = val * 16 + *cp - '0';
2157 else
2158 break;
2159 /*@-charint@*/
2160 cp++;
2161 }
2162 return val;
2163}
2164#endif
2165
2166
2167
2168#endif
2169
2170
2171/* #ifdef SH_USE_UTMP */
2172#endif
2173
2174
2175
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