summaryrefslogtreecommitdiff
path: root/source3/smbd/open.c
blob: 2c9d3290d8140b8516f0bba9a1c7d5851850afee (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
/* 
   Unix SMB/CIFS implementation.
   file opening and share modes
   Copyright (C) Andrew Tridgell 1992-1998
   Copyright (C) Jeremy Allison 2001
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

extern userdom_struct current_user_info;
extern uint16 global_oplock_port;
extern BOOL global_client_failed_oplock_break;

/****************************************************************************
 fd support routines - attempt to do a dos_open.
****************************************************************************/

static int fd_open(struct connection_struct *conn, char *fname, 
		   int flags, mode_t mode)
{
	int fd;
#ifdef O_NOFOLLOW
	if (!lp_symlinks(SNUM(conn)))
		flags |= O_NOFOLLOW;
#endif

	fd = SMB_VFS_OPEN(conn,fname,flags,mode);

	/* Fix for files ending in '.' */
	if((fd == -1) && (errno == ENOENT) &&
	   (strchr_m(fname,'.')==NULL)) {
		pstrcat(fname,".");
		fd = SMB_VFS_OPEN(conn,fname,flags,mode);
	}

	DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n", fname,
		flags, (int)mode, fd, (fd == -1) ? strerror(errno) : "" ));

	return fd;
}

/****************************************************************************
 Close the file associated with a fsp.
****************************************************************************/

int fd_close(struct connection_struct *conn, files_struct *fsp)
{
	if (fsp->fd == -1)
		return 0; /* what we used to call a stat open. */
	return fd_close_posix(conn, fsp);
}


/****************************************************************************
 Check a filename for the pipe string.
****************************************************************************/

static void check_for_pipe(char *fname)
{
	/* special case of pipe opens */
	char s[10];
	StrnCpy(s,fname,sizeof(s)-1);
	strlower_m(s);
	if (strstr(s,"pipe/")) {
		DEBUG(3,("Rejecting named pipe open for %s\n",fname));
		unix_ERR_class = ERRSRV;
		unix_ERR_code = ERRaccess;
		unix_ERR_ntstatus = NT_STATUS_ACCESS_DENIED;
	}
}

/****************************************************************************
 Open a file.
****************************************************************************/

static BOOL open_file(files_struct *fsp,connection_struct *conn,
		      const char *fname1,SMB_STRUCT_STAT *psbuf,int flags,mode_t mode, uint32 desired_access)
{
	extern struct current_user current_user;
	pstring fname;
	int accmode = (flags & O_ACCMODE);
	int local_flags = flags;

	fsp->fd = -1;
	fsp->oplock_type = NO_OPLOCK;
	errno = EPERM;

	pstrcpy(fname,fname1);

	/* Check permissions */

	/*
	 * This code was changed after seeing a client open request 
	 * containing the open mode of (DENY_WRITE/read-only) with
	 * the 'create if not exist' bit set. The previous code
	 * would fail to open the file read only on a read-only share
	 * as it was checking the flags parameter  directly against O_RDONLY,
	 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
	 * JRA.
	 */

	if (!CAN_WRITE(conn)) {
		/* It's a read-only share - fail if we wanted to write. */
		if(accmode != O_RDONLY) {
			DEBUG(3,("Permission denied opening %s\n",fname));
			check_for_pipe(fname);
			return False;
		} else if(flags & O_CREAT) {
			/* We don't want to write - but we must make sure that O_CREAT
			   doesn't create the file if we have write access into the
			   directory.
			*/
			flags &= ~O_CREAT;
			local_flags &= ~O_CREAT;
		}
	}

	/*
	 * This little piece of insanity is inspired by the
	 * fact that an NT client can open a file for O_RDONLY,
	 * but set the create disposition to FILE_EXISTS_TRUNCATE.
	 * If the client *can* write to the file, then it expects to
	 * truncate the file, even though it is opening for readonly.
	 * Quicken uses this stupid trick in backup file creation...
	 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
	 * for helping track this one down. It didn't bite us in 2.0.x
	 * as we always opened files read-write in that release. JRA.
	 */

	if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
		DEBUG(10,("open_file: truncate requested on read-only open for file %s\n",fname ));
		local_flags = (flags & ~O_ACCMODE)|O_RDWR;
	}

	if ((desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
			(local_flags & O_CREAT) || ((local_flags & O_TRUNC) == O_TRUNC) ) {

		/*
		 * We can't actually truncate here as the file may be locked.
		 * open_file_shared will take care of the truncate later. JRA.
		 */

		local_flags &= ~O_TRUNC;

#if defined(O_NONBLOCK) && defined(S_ISFIFO)
		/*
		 * We would block on opening a FIFO with no one else on the
		 * other end. Do what we used to do and add O_NONBLOCK to the
		 * open flags. JRA.
		 */

		if (VALID_STAT(*psbuf) && S_ISFIFO(psbuf->st_mode))
			local_flags |= O_NONBLOCK;
#endif

		/* Don't create files with Microsoft wildcard characters. */
		if ((local_flags & O_CREAT) && !VALID_STAT(*psbuf) && ms_has_wild(fname))  {
			unix_ERR_class = ERRDOS;
			unix_ERR_code = ERRinvalidname;
			unix_ERR_ntstatus = NT_STATUS_OBJECT_NAME_INVALID;
			return False;
		}

		/* Actually do the open */
		fsp->fd = fd_open(conn, fname, local_flags, mode);
		if (fsp->fd == -1)  {
			DEBUG(3,("Error opening file %s (%s) (local_flags=%d) (flags=%d)\n",
				 fname,strerror(errno),local_flags,flags));
			check_for_pipe(fname);
			return False;
		}

		/* Inherit the ACL if the file was created. */
		if ((local_flags & O_CREAT) && !VALID_STAT(*psbuf))
			inherit_access_acl(conn, fname, mode);

	} else
		fsp->fd = -1; /* What we used to call a stat open. */

	if (!VALID_STAT(*psbuf)) {
		int ret;

		if (fsp->fd == -1)
			ret = SMB_VFS_STAT(conn, fname, psbuf);
		else {
			ret = SMB_VFS_FSTAT(fsp,fsp->fd,psbuf);
			/* If we have an fd, this stat should succeed. */
			if (ret == -1)
				DEBUG(0,("Error doing fstat on open file %s (%s)\n", fname,strerror(errno) ));
		}

		/* For a non-io open, this stat failing means file not found. JRA */
		if (ret == -1) {
			fd_close(conn, fsp);
			return False;
		}
	}

	/*
	 * POSIX allows read-only opens of directories. We don't
	 * want to do this (we use a different code path for this)
	 * so catch a directory open and return an EISDIR. JRA.
	 */

	if(S_ISDIR(psbuf->st_mode)) {
		fd_close(conn, fsp);
		errno = EISDIR;
		return False;
	}

	fsp->mode = psbuf->st_mode;
	fsp->inode = psbuf->st_ino;
	fsp->dev = psbuf->st_dev;
	fsp->vuid = current_user.vuid;
	fsp->size = psbuf->st_size;
	fsp->pos = -1;
	fsp->can_lock = True;
	fsp->can_read = ((flags & O_WRONLY)==0);
	fsp->can_write = ((flags & (O_WRONLY|O_RDWR))!=0);
	fsp->share_mode = 0;
	fsp->desired_access = desired_access;
	fsp->print_file = False;
	fsp->modified = False;
	fsp->oplock_type = NO_OPLOCK;
	fsp->sent_oplock_break = NO_BREAK_SENT;
	fsp->is_directory = False;
	fsp->is_stat = False;
	fsp->directory_delete_on_close = False;
	string_set(&fsp->fsp_name,fname);
	fsp->wcp = NULL; /* Write cache pointer. */

	DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
		 *current_user_info.smb_name ? current_user_info.smb_name : conn->user,fsp->fsp_name,
		 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
		 conn->num_files_open + 1));

	return True;
}

/****************************************************************************
  C. Hoch 11/22/95
  Helper for open_file_shared. 
  Truncate a file after checking locking; close file if locked.
  **************************************************************************/

static int truncate_unless_locked(struct connection_struct *conn, files_struct *fsp)
{
	SMB_BIG_UINT mask = (SMB_BIG_UINT)-1;

	if (is_locked(fsp,fsp->conn,mask,0,WRITE_LOCK,True)){
		errno = EACCES;
		unix_ERR_class = ERRDOS;
		unix_ERR_code = ERRlock;
		unix_ERR_ntstatus = dos_to_ntstatus(ERRDOS, ERRlock);
		return -1;
	} else {
		return SMB_VFS_FTRUNCATE(fsp,fsp->fd,0); 
	}
}

/*******************************************************************
return True if the filename is one of the special executable types
********************************************************************/
static BOOL is_executable(const char *fname)
{
	if ((fname = strrchr_m(fname,'.'))) {
		if (strequal(fname,".com") ||
		    strequal(fname,".dll") ||
		    strequal(fname,".exe") ||
		    strequal(fname,".sym")) {
			return True;
		}
	}
	return False;
}

enum {AFAIL,AREAD,AWRITE,AALL};

/*******************************************************************
reproduce the share mode access table
this is horrendoously complex, and really can't be justified on any
rational grounds except that this is _exactly_ what NT does. See
the DENY1 and DENY2 tests in smbtorture for a comprehensive set of
test routines.
********************************************************************/
static int access_table(int new_deny,int old_deny,int old_mode,
			BOOL same_pid, BOOL isexe)
{
	  if (new_deny == DENY_ALL || old_deny == DENY_ALL) return(AFAIL);

	  if (same_pid) {
		  if (isexe && old_mode == DOS_OPEN_RDONLY && 
		      old_deny == DENY_DOS && new_deny == DENY_READ) {
			  return AFAIL;
		  }
		  if (!isexe && old_mode == DOS_OPEN_RDONLY && 
		      old_deny == DENY_DOS && new_deny == DENY_DOS) {
			  return AREAD;
		  }
		  if (new_deny == DENY_FCB && old_deny == DENY_DOS) {
			  if (isexe) return AFAIL;
			  if (old_mode == DOS_OPEN_RDONLY) return AFAIL;
			  return AALL;
		  }
		  if (old_mode == DOS_OPEN_RDONLY && old_deny == DENY_DOS) {
			  if (new_deny == DENY_FCB || new_deny == DENY_READ) {
				  if (isexe) return AREAD;
				  return AFAIL;
			  }
		  }
		  if (old_deny == DENY_FCB) {
			  if (new_deny == DENY_DOS || new_deny == DENY_FCB) return AALL;
			  return AFAIL;
		  }
	  }

	  if (old_deny == DENY_DOS || new_deny == DENY_DOS || 
	      old_deny == DENY_FCB || new_deny == DENY_FCB) {
		  if (isexe) {
			  if (old_deny == DENY_FCB || new_deny == DENY_FCB) {
				  return AFAIL;
			  }
			  if (old_deny == DENY_DOS) {
				  if (new_deny == DENY_READ && 
				      (old_mode == DOS_OPEN_RDONLY || 
				       old_mode == DOS_OPEN_RDWR)) {
					  return AFAIL;
				  }
				  if (new_deny == DENY_WRITE && 
				      (old_mode == DOS_OPEN_WRONLY || 
				       old_mode == DOS_OPEN_RDWR)) {
					  return AFAIL;
				  }
				  return AALL;
			  }
			  if (old_deny == DENY_NONE) return AALL;
			  if (old_deny == DENY_READ) return AWRITE;
			  if (old_deny == DENY_WRITE) return AREAD;
		  }
		  /* it isn't a exe, dll, sym or com file */
		  if (old_deny == new_deny && same_pid)
			  return(AALL);    

		  if (old_deny == DENY_READ || new_deny == DENY_READ) return AFAIL;
		  if (old_mode == DOS_OPEN_RDONLY) return(AREAD);
		  
		  return(AFAIL);
	  }
	  
	  switch (new_deny) 
		  {
		  case DENY_WRITE:
			  if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_RDONLY) return(AREAD);
			  if (old_deny==DENY_READ && old_mode==DOS_OPEN_RDONLY) return(AWRITE);
			  if (old_deny==DENY_NONE && old_mode==DOS_OPEN_RDONLY) return(AALL);
			  return(AFAIL);
		  case DENY_READ:
			  if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_WRONLY) return(AREAD);
			  if (old_deny==DENY_READ && old_mode==DOS_OPEN_WRONLY) return(AWRITE);
			  if (old_deny==DENY_NONE && old_mode==DOS_OPEN_WRONLY) return(AALL);
			  return(AFAIL);
		  case DENY_NONE:
			  if (old_deny==DENY_WRITE) return(AREAD);
			  if (old_deny==DENY_READ) return(AWRITE);
			  if (old_deny==DENY_NONE) return(AALL);
			  return(AFAIL);      
		  }
	  return(AFAIL);      
}


/****************************************************************************
check if we can open a file with a share mode
****************************************************************************/

static BOOL check_share_mode(connection_struct *conn, share_mode_entry *share, int share_mode, uint32 desired_access,
			     const char *fname, BOOL fcbopen, int *flags)
{
	int deny_mode = GET_DENY_MODE(share_mode);
	int old_open_mode = GET_OPEN_MODE(share->share_mode);
	int old_deny_mode = GET_DENY_MODE(share->share_mode);

	/*
	 * share modes = false means don't bother to check for
	 * DENY mode conflict. This is a *really* bad idea :-). JRA.
	 */

	if(!lp_share_modes(SNUM(conn)))
		return True;

	/*
	 * Don't allow any opens once the delete on close flag has been
	 * set.
	 */

	if (GET_DELETE_ON_CLOSE_FLAG(share->share_mode)) {
		DEBUG(5,("check_share_mode: Failing open on file %s as delete on close flag is set.\n",
			fname ));
		/* Use errno to map to correct error. */
		unix_ERR_class = SMB_SUCCESS;
		unix_ERR_code = 0;
		unix_ERR_ntstatus = NT_STATUS_OK;
		return False;
	}

	/* this is a nasty hack, but necessary until we rewrite our open
	   handling to use a NTCreateX call as the basic call.
	   NT may open a file with neither read nor write access, and in
		   this case it expects the open not to conflict with any
		   existing deny modes. This happens (for example) during a
		   "xcopy /o" where the second file descriptor is used for
		   ACL sets
		   (tridge)
	*/

	/*
	 * This is a bit wierd - the test for desired access not having the
	 * critical bits seems seems odd. Firstly, if both opens have no
	 * critical bits then always ignore. Then check the "allow delete"
	 * then check for either. This probably isn't quite right yet but
	 * gets us much closer. JRA.
	 */

	/*
	 * If desired_access doesn't contain READ_DATA,WRITE_DATA,APPEND_DATA or EXECUTE
	 * and the existing desired_acces then share modes don't conflict.
	 */

	if ( !(desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) &&
		!(share->desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ) {

		/*
		 * Wrinkle discovered by smbtorture....
		 * If both are non-io open and requester is asking for delete and current open has delete access
		 * but neither open has allowed file share delete then deny.... this is very strange and
		 * seems to be the only case in which non-io opens conflict. JRA.
		 */

		if ((desired_access & DELETE_ACCESS) && (share->desired_access & DELETE_ACCESS) && 
				(!GET_ALLOW_SHARE_DELETE(share->share_mode) || !GET_ALLOW_SHARE_DELETE(share_mode))) {
			DEBUG(5,("check_share_mode: Failing open on file %s as delete access requests conflict.\n",
				fname ));
			unix_ERR_class = ERRDOS;
			unix_ERR_code = ERRbadshare;
			unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;

			return False;
		}

		DEBUG(5,("check_share_mode: Allowing open on file %s as both desired access (0x%x) \
and existing desired access (0x%x) are non-data opens\n", 
			fname, (unsigned int)desired_access, (unsigned int)share->desired_access ));
		return True;
	}

	/*
	 * If delete access was requested and the existing share mode doesn't have
	 * ALLOW_SHARE_DELETE then deny.
	 */

	if ((desired_access & DELETE_ACCESS) && !GET_ALLOW_SHARE_DELETE(share->share_mode)) {
		DEBUG(5,("check_share_mode: Failing open on file %s as delete access requested and allow share delete not set.\n",
			fname ));
		unix_ERR_class = ERRDOS;
		unix_ERR_code = ERRbadshare;
		unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;

		return False;
	}

	/*
	 * The inverse of the above.
	 * If delete access was granted and the new share mode doesn't have
	 * ALLOW_SHARE_DELETE then deny.
	 */

	if ((share->desired_access & DELETE_ACCESS) && !GET_ALLOW_SHARE_DELETE(share_mode)) {
		DEBUG(5,("check_share_mode: Failing open on file %s as delete access granted and allow share delete not requested.\n",
			fname ));
		unix_ERR_class = ERRDOS;
		unix_ERR_code = ERRbadshare;
		unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;

		return False;
	}

	/*
	 * If desired_access doesn't contain READ_DATA,WRITE_DATA,APPEND_DATA or EXECUTE
	 * then share modes don't conflict. Likewise with existing desired access.
	 */

	if ( !(desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
		!(share->desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ) {
		DEBUG(5,("check_share_mode: Allowing open on file %s as desired access (0x%x) doesn't conflict with\
existing desired access (0x%x).\n", fname, (unsigned int)desired_access, (unsigned int)share->desired_access ));
		return True;
	}

	{
		int access_allowed = access_table(deny_mode,old_deny_mode,old_open_mode,
						(share->pid == sys_getpid()),is_executable(fname));

		if ((access_allowed == AFAIL) ||
			(!fcbopen && (access_allowed == AREAD && *flags == O_RDWR)) ||
			(access_allowed == AREAD && *flags != O_RDONLY) ||
			(access_allowed == AWRITE && *flags != O_WRONLY)) {

			DEBUG(2,("Share violation on file (%d,%d,%d,%d,%s,fcbopen = %d, flags = %d) = %d\n",
				deny_mode,old_deny_mode,old_open_mode,
				(int)share->pid,fname, fcbopen, *flags, access_allowed));

			unix_ERR_class = ERRDOS;
			unix_ERR_code = ERRbadshare;
			unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;

			return False;
		}

		if (access_allowed == AREAD)
			*flags = O_RDONLY;

		if (access_allowed == AWRITE)
			*flags = O_WRONLY;

	}

	return True;
}


#if defined(DEVELOPER)
static void validate_my_share_entries(int num, share_mode_entry *share_entry)
{
	files_struct *fsp;

	if (share_entry->pid != sys_getpid())
		return;

	fsp = file_find_dif(share_entry->dev, share_entry->inode, share_entry->share_file_id);
	if (!fsp) {
		DEBUG(0,("validate_my_share_entries: PANIC : %s\n", share_mode_str(num, share_entry) ));
		smb_panic("validate_my_share_entries: Cannot match a share entry with an open file\n");
	}

	if (((uint16)fsp->oplock_type) != share_entry->op_type) {
		pstring str;
		DEBUG(0,("validate_my_share_entries: PANIC : %s\n", share_mode_str(num, share_entry) ));
		slprintf(str, sizeof(str)-1, "validate_my_share_entries: file %s, oplock_type = 0x%x, op_type = 0x%x\n",
				fsp->fsp_name, (unsigned int)fsp->oplock_type, (unsigned int)share_entry->op_type );
		smb_panic(str);
	}
}
#endif

/****************************************************************************
 Deal with open deny mode and oplock break processing.
 Invarient: Share mode must be locked on entry and exit.
 Returns -1 on error, or number of share modes on success (may be zero).
****************************************************************************/

static int open_mode_check(connection_struct *conn, const char *fname, SMB_DEV_T dev,
			   SMB_INO_T inode, 
			   uint32 desired_access,
			   int share_mode, int *p_flags, int *p_oplock_request,
			   BOOL *p_all_current_opens_are_level_II)
{
	int i;
	int num_share_modes;
	int oplock_contention_count = 0;
	share_mode_entry *old_shares = 0;
	BOOL fcbopen = False;
	BOOL broke_oplock;	
	
	if(GET_OPEN_MODE(share_mode) == DOS_OPEN_FCB)
		fcbopen = True;
	
	num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
	
	if(num_share_modes == 0)
		return 0;
	
	/*
	 * Check if the share modes will give us access.
	 */
	
	do {
		share_mode_entry broken_entry;
		
		broke_oplock = False;
		*p_all_current_opens_are_level_II = True;
		
		for(i = 0; i < num_share_modes; i++) {
			share_mode_entry *share_entry = &old_shares[i];
			
#if defined(DEVELOPER)
			validate_my_share_entries(i, share_entry);
#endif

			/* 
			 * By observation of NetBench, oplocks are broken *before* share
			 * modes are checked. This allows a file to be closed by the client
			 * if the share mode would deny access and the client has an oplock. 
			 * Check if someone has an oplock on this file. If so we must break 
			 * it before continuing. 
			 */
			
			if((*p_oplock_request && EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) ||
			   (!*p_oplock_request && (share_entry->op_type != NO_OPLOCK))) {
				
				BOOL opb_ret;

				DEBUG(5,("open_mode_check: oplock_request = %d, breaking oplock (%x) on file %s, \
dev = %x, inode = %.0f\n", *p_oplock_request, share_entry->op_type, fname, (unsigned int)dev, (double)inode));
				
				/* Ensure the reply for the open uses the correct sequence number. */
				/* This isn't a real deferred packet as it's response will also increment
				 * the sequence.
				 */
				srv_defer_sign_response(get_current_mid(), False);

				/* Oplock break - unlock to request it. */
				unlock_share_entry(conn, dev, inode);
				
				opb_ret = request_oplock_break(share_entry, False);
				
				/* Now relock. */
				lock_share_entry(conn, dev, inode);
				
				if(opb_ret == False) {
					DEBUG(0,("open_mode_check: FAILED when breaking oplock (%x) on file %s, \
dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
					SAFE_FREE(old_shares);
					errno = EACCES;
					unix_ERR_class = ERRDOS;
					unix_ERR_code = ERRbadshare;
					unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
					return -1;
				}
				
				broke_oplock = True;
				broken_entry = *share_entry;
				break;
				
			} else if (!LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) {
				*p_all_current_opens_are_level_II = False;
			}
			
			/* someone else has a share lock on it, check to see if we can too */
			if (!check_share_mode(conn, share_entry, share_mode, desired_access,
						fname, fcbopen, p_flags)) {
				SAFE_FREE(old_shares);
				errno = EACCES;
				return -1;
                        }
			
		} /* end for */
		
		if(broke_oplock) {
			SAFE_FREE(old_shares);
			num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
			oplock_contention_count++;
			
			/* Paranoia check that this is no longer an exlusive entry. */
			for(i = 0; i < num_share_modes; i++) {
				share_mode_entry *share_entry = &old_shares[i];
				
				if (share_modes_identical(&broken_entry, share_entry) && 
				    EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type) ) {
					
					/*
					 * This should not happen. The target left this oplock
					 * as exlusive.... The process *must* be dead.... 
					 */
					
					DEBUG(0,("open_mode_check: exlusive oplock left by process %d after break ! For file %s, \
dev = %x, inode = %.0f. Deleting it to continue...\n", (int)broken_entry.pid, fname, (unsigned int)dev, (double)inode));
					
					if (process_exists(broken_entry.pid)) {
						DEBUG(0,("open_mode_check: Existent process %lu left active oplock.\n",
							 (unsigned long)broken_entry.pid ));
					}
					
					if (del_share_entry(dev, inode, &broken_entry, NULL) == -1) {
						errno = EACCES;
						unix_ERR_class = ERRDOS;
						unix_ERR_code = ERRbadshare;
						unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
						return -1;
					}
					
					/*
					 * We must reload the share modes after deleting the 
					 * other process's entry.
					 */
					
					SAFE_FREE(old_shares);
					num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
					break;
				}
			} /* end for paranoia... */
		} /* end if broke_oplock */
		
	} while(broke_oplock);
	
	if(old_shares != 0)
		SAFE_FREE(old_shares);
	
	/*
	 * Refuse to grant an oplock in case the contention limit is
	 * reached when going through the lock list multiple times.
	 */
	
	if(oplock_contention_count >= lp_oplock_contention_limit(SNUM(conn))) {
		*p_oplock_request = 0;
		DEBUG(4,("open_mode_check: oplock contention = %d. Not granting oplock.\n",
			 oplock_contention_count ));
	}
	
	return num_share_modes;
}

/****************************************************************************
set a kernel flock on a file for NFS interoperability
this requires a patch to Linux
****************************************************************************/
static void kernel_flock(files_struct *fsp, int deny_mode)
{
#if HAVE_KERNEL_SHARE_MODES
	int kernel_mode = 0;
	if (deny_mode == DENY_READ) kernel_mode = LOCK_MAND|LOCK_WRITE;
	else if (deny_mode == DENY_WRITE) kernel_mode = LOCK_MAND|LOCK_READ;
	else if (deny_mode == DENY_ALL) kernel_mode = LOCK_MAND;
	if (kernel_mode) flock(fsp->fd, kernel_mode);
#endif
	;;
}


static BOOL open_match_attributes(connection_struct *conn, char *path, mode_t existing_mode,
		mode_t new_mode, mode_t *returned_mode)
{
	uint32 old_dos_mode, new_dos_mode;
	uint32 noarch_old_dos_mode, noarch_new_dos_mode;
	SMB_STRUCT_STAT sbuf;

	ZERO_STRUCT(sbuf);

	sbuf.st_mode = existing_mode;
	old_dos_mode = dos_mode(conn, path, &sbuf);

	sbuf.st_mode = new_mode;
	new_dos_mode = dos_mode(conn, path, &sbuf);

	noarch_old_dos_mode = (old_dos_mode & ~FILE_ATTRIBUTE_ARCHIVE);
	noarch_new_dos_mode = (new_dos_mode & ~FILE_ATTRIBUTE_ARCHIVE);

	if((noarch_old_dos_mode == 0 && noarch_new_dos_mode != 0) || 
	   (noarch_old_dos_mode != 0 && ((noarch_old_dos_mode & noarch_new_dos_mode) == noarch_old_dos_mode)))
		*returned_mode = new_mode;
	else
		*returned_mode = (mode_t)0;

	DEBUG(10,("open_match_attributes: file %s old_dos_mode = 0x%x, existing_mode = 0%o, new_dos_mode = 0x%x returned_mode = 0%o\n",
		path,
		old_dos_mode, (unsigned int)existing_mode, new_dos_mode, (unsigned int)*returned_mode ));

	/* If we're mapping SYSTEM and HIDDEN ensure they match. */
	if (lp_map_system(SNUM(conn))) {
		if ((old_dos_mode & FILE_ATTRIBUTE_SYSTEM) && !(new_dos_mode & FILE_ATTRIBUTE_SYSTEM))
			return False;
	}
	if (lp_map_hidden(SNUM(conn))) {
		if ((old_dos_mode & FILE_ATTRIBUTE_HIDDEN) && !(new_dos_mode & FILE_ATTRIBUTE_HIDDEN))
			return False;
	}
	return True;
}

/****************************************************************************
 Open a file with a share mode.
****************************************************************************/

files_struct *open_file_shared(connection_struct *conn,char *fname, SMB_STRUCT_STAT *psbuf, 
			       int share_mode,int ofun, mode_t mode,int oplock_request, 
			       int *Access,int *action)
{
	return open_file_shared1(conn, fname, psbuf, 0, share_mode, ofun, mode, 
				 oplock_request, Access, action);
}

/****************************************************************************
 Open a file with a share mode.
****************************************************************************/

files_struct *open_file_shared1(connection_struct *conn,char *fname, SMB_STRUCT_STAT *psbuf, 
				uint32 desired_access, 
				int share_mode,int ofun, mode_t mode,int oplock_request, 
				int *Access,int *action)
{
	int flags=0;
	int flags2=0;
	int deny_mode = GET_DENY_MODE(share_mode);
	BOOL allow_share_delete = GET_ALLOW_SHARE_DELETE(share_mode);
	BOOL delete_on_close = GET_DELETE_ON_CLOSE_FLAG(share_mode);
	BOOL file_existed = VALID_STAT(*psbuf);
	BOOL fcbopen = False;
	BOOL def_acl = False;
	SMB_DEV_T dev = 0;
	SMB_INO_T inode = 0;
	int num_share_modes = 0;
	BOOL all_current_opens_are_level_II = False;
	BOOL fsp_open = False;
	files_struct *fsp = NULL;
	int open_mode=0;
	uint16 port = 0;
	mode_t new_mode = (mode_t)0;

	if (conn->printer) {
		/* printers are handled completely differently. Most of the passed parameters are
			ignored */
		if (Access)
			*Access = DOS_OPEN_WRONLY;
		if (action)
			*action = FILE_WAS_CREATED;
		return print_fsp_open(conn, fname);
	}

	fsp = file_new(conn);
	if(!fsp)
		return NULL;

	DEBUG(10,("open_file_shared: fname = %s, share_mode = %x, ofun = %x, mode = %o, oplock request = %d\n",
		fname, share_mode, ofun, (int)mode,  oplock_request ));

	if (!check_name(fname,conn)) {
		file_free(fsp);
		return NULL;
	} 

	/* ignore any oplock requests if oplocks are disabled */
	if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break) {
		oplock_request = 0;
	}

	/* this is for OS/2 EAs - try and say we don't support them */
	if (strstr(fname,".+,;=[].")) {
		unix_ERR_class = ERRDOS;
		/* OS/2 Workplace shell fix may be main code stream in a later release. */ 
#if 1 /* OS2_WPS_FIX - Recent versions of OS/2 need this. */
		unix_ERR_code = ERRcannotopen;
#else /* OS2_WPS_FIX */
		unix_ERR_code = ERROR_EAS_NOT_SUPPORTED;
#endif /* OS2_WPS_FIX */

		DEBUG(5,("open_file_shared: OS/2 EA's are not supported.\n"));
		file_free(fsp);
		return NULL;
	}

	if ((GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL) && file_existed)  {
		DEBUG(5,("open_file_shared: create new requested for file %s and file already exists.\n",
			fname ));
		file_free(fsp);
		errno = EEXIST;
		return NULL;
	}
      
	if (CAN_WRITE(conn) && (GET_FILE_CREATE_DISPOSITION(ofun) == FILE_CREATE_IF_NOT_EXIST))
		flags2 |= O_CREAT;

	if (CAN_WRITE(conn) && (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE))
		flags2 |= O_TRUNC;

	/* We only care about matching attributes on file exists and truncate. */
	if (file_existed && (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE)) {
		if (!open_match_attributes(conn, fname, psbuf->st_mode, mode, &new_mode)) {
			DEBUG(5,("open_file_shared: attributes missmatch for file %s (0%o, 0%o)\n",
						fname, (int)psbuf->st_mode, (int)mode ));
			file_free(fsp);
			errno = EACCES;
			return NULL;
		}
	}

	if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL)
		flags2 |= O_EXCL;

	/* note that we ignore the append flag as 
		append does not mean the same thing under dos and unix */

	switch (GET_OPEN_MODE(share_mode)) {
		case DOS_OPEN_WRONLY: 
			flags = O_WRONLY; 
			if (desired_access == 0)
				desired_access = FILE_WRITE_DATA;
			break;
		case DOS_OPEN_FCB: 
			fcbopen = True;
			flags = O_RDWR; 
			if (desired_access == 0)
				desired_access = FILE_READ_DATA|FILE_WRITE_DATA;
			break;
		case DOS_OPEN_RDWR: 
			flags = O_RDWR; 
			if (desired_access == 0)
				desired_access = FILE_READ_DATA|FILE_WRITE_DATA;
			break;
		default:
			flags = O_RDONLY;
			if (desired_access == 0)
				desired_access = FILE_READ_DATA;
			break;
	}

#if defined(O_SYNC)
	if (GET_FILE_SYNC_OPENMODE(share_mode)) {
		flags2 |= O_SYNC;
	}
#endif /* O_SYNC */
  
	if (flags != O_RDONLY && file_existed && 
			(!CAN_WRITE(conn) || IS_DOS_READONLY(dos_mode(conn,fname,psbuf)))) {
		if (!fcbopen) {
			DEBUG(5,("open_file_shared: read/write access requested for file %s on read only %s\n",
				fname, !CAN_WRITE(conn) ? "share" : "file" ));
			file_free(fsp);
			errno = EACCES;
			return NULL;
		}
		flags = O_RDONLY;
	}

	if (deny_mode > DENY_NONE && deny_mode!=DENY_FCB) {
		DEBUG(2,("Invalid deny mode %d on file %s\n",deny_mode,fname));
		file_free(fsp);
		errno = EINVAL;
		return NULL;
	}

	if (file_existed) {

		dev = psbuf->st_dev;
		inode = psbuf->st_ino;

		lock_share_entry(conn, dev, inode);

		num_share_modes = open_mode_check(conn, fname, dev, inode, 
						  desired_access,
						  share_mode,
						  &flags, &oplock_request, &all_current_opens_are_level_II);
		if(num_share_modes == -1) {

			/*
			 * This next line is a subtlety we need for MS-Access. If a file open will
			 * fail due to share permissions and also for security (access)
			 * reasons, we need to return the access failed error, not the
			 * share error. This means we must attempt to open the file anyway
			 * in order to get the UNIX access error - even if we're going to
			 * fail the open for share reasons. This is bad, as we're burning
			 * another fd if there are existing locks but there's nothing else
			 * we can do. We also ensure we're not going to create or tuncate
			 * the file as we only want an access decision at this stage. JRA.
			 */
			errno = 0;
			fsp_open = open_file(fsp,conn,fname,psbuf,
						flags|(flags2&~(O_TRUNC|O_CREAT)),mode,desired_access);

			DEBUG(4,("open_file_shared : share_mode deny - calling open_file with \
flags=0x%X flags2=0x%X mode=0%o returned %d\n",
				flags,(flags2&~(O_TRUNC|O_CREAT)),(int)mode,(int)fsp_open ));

			if (!fsp_open && errno) {
				unix_ERR_class = ERRDOS;
				unix_ERR_code = ERRnoaccess;
				unix_ERR_ntstatus = NT_STATUS_ACCESS_DENIED;
			}

			unlock_share_entry(conn, dev, inode);
			if (fsp_open)
				fd_close(conn, fsp);
			file_free(fsp);
			return NULL;
		}

		/*
		 * We exit this block with the share entry *locked*.....
		 */
	}

	/*
	 * Ensure we pay attention to default ACLs on directories if required.
	 */

        if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
			(def_acl = directory_has_default_acl(conn, parent_dirname(fname))))
                mode = 0777;

	DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
			flags,flags2,(int)mode));

	/*
	 * open_file strips any O_TRUNC flags itself.
	 */

	fsp_open = open_file(fsp,conn,fname,psbuf,flags|flags2,mode,desired_access);

	if (!fsp_open && (flags == O_RDWR) && (errno != ENOENT) && fcbopen) {
		if((fsp_open = open_file(fsp,conn,fname,psbuf,O_RDONLY,mode,desired_access)) == True)
			flags = O_RDONLY;
	}

	if (!fsp_open) {
		if(file_existed)
			unlock_share_entry(conn, dev, inode);
		file_free(fsp);
		return NULL;
	}

	/*
	 * Deal with the race condition where two smbd's detect the file doesn't
	 * exist and do the create at the same time. One of them will win and
	 * set a share mode, the other (ie. this one) should check if the
	 * requested share mode for this create is allowed.
	 */

	if (!file_existed) { 

		/*
		 * Now the file exists and fsp is successfully opened,
		 * fsp->dev and fsp->inode are valid and should replace the
		 * dev=0,inode=0 from a non existent file. Spotted by
		 * Nadav Danieli <nadavd@exanet.com>. JRA.
		 */

		dev = fsp->dev;
		inode = fsp->inode;

		lock_share_entry_fsp(fsp);

		num_share_modes = open_mode_check(conn, fname, dev, inode, 
						  desired_access,
						  share_mode,
						  &flags, &oplock_request, &all_current_opens_are_level_II);

		if(num_share_modes == -1) {
			unlock_share_entry_fsp(fsp);
			fd_close(conn,fsp);
			file_free(fsp);
			return NULL;
		}

		/*
		 * If there are any share modes set then the file *did*
		 * exist. Ensure we return the correct value for action.
		 */

		if (num_share_modes > 0)
			file_existed = True;

		/*
		 * We exit this block with the share entry *locked*.....
		 */
	}

	/* note that we ignore failure for the following. It is
           basically a hack for NFS, and NFS will never set one of
           these only read them. Nobody but Samba can ever set a deny
           mode and we have already checked our more authoritative
           locking database for permission to set this deny mode. If
           the kernel refuses the operations then the kernel is wrong */
	kernel_flock(fsp, deny_mode);

	/*
	 * At this point onwards, we can guarentee that the share entry
	 * is locked, whether we created the file or not, and that the
	 * deny mode is compatible with all current opens.
	 */

	/*
	 * If requested, truncate the file.
	 */

	if (flags2&O_TRUNC) {
		/*
		 * We are modifing the file after open - update the stat struct..
		 */
		if ((truncate_unless_locked(conn,fsp) == -1) || (SMB_VFS_FSTAT(fsp,fsp->fd,psbuf)==-1)) {
			unlock_share_entry_fsp(fsp);
			fd_close(conn,fsp);
			file_free(fsp);
			return NULL;
		}
	}

	switch (flags) {
		case O_RDONLY:
			open_mode = DOS_OPEN_RDONLY;
			break;
		case O_RDWR:
			open_mode = DOS_OPEN_RDWR;
			break;
		case O_WRONLY:
			open_mode = DOS_OPEN_WRONLY;
			break;
	}

	fsp->share_mode = SET_DENY_MODE(deny_mode) | 
						SET_OPEN_MODE(open_mode) | 
						SET_ALLOW_SHARE_DELETE(allow_share_delete);

	DEBUG(10,("open_file_shared : share_mode = %x\n", fsp->share_mode ));

	if (Access)
		(*Access) = open_mode;

	if (action) {
		if (file_existed && !(flags2 & O_TRUNC))
			*action = FILE_WAS_OPENED;
		if (!file_existed)
			*action = FILE_WAS_CREATED;
		if (file_existed && (flags2 & O_TRUNC))
			*action = FILE_WAS_OVERWRITTEN;
	}

	/* 
	 * Setup the oplock info in both the shared memory and
	 * file structs.
	 */

	if(oplock_request && (num_share_modes == 0) && 
			!IS_VETO_OPLOCK_PATH(conn,fname) && set_file_oplock(fsp, oplock_request) ) {
		port = global_oplock_port;
	} else if (oplock_request && all_current_opens_are_level_II) {
		port = global_oplock_port;
		oplock_request = LEVEL_II_OPLOCK;
		set_file_oplock(fsp, oplock_request);
	} else {
		port = 0;
		oplock_request = 0;
	}

	set_share_mode(fsp, port, oplock_request);

	if (delete_on_close) {
		NTSTATUS result = set_delete_on_close_internal(fsp, delete_on_close);

		if (NT_STATUS_V(result) !=  NT_STATUS_V(NT_STATUS_OK)) {
			/* Remember to delete the mode we just added. */
			del_share_mode(fsp, NULL);
			unlock_share_entry_fsp(fsp);
			fd_close(conn,fsp);
			file_free(fsp);
			return NULL;
		}
	}
	
	/*
	 * Take care of inherited ACLs on created files - if default ACL not
	 * selected.
	 */

	if (!file_existed && !def_acl) {

		int saved_errno = errno; /* We might get ENOSYS in the next call.. */

		if (SMB_VFS_FCHMOD_ACL(fsp, fsp->fd, mode) == -1 && errno == ENOSYS)
			errno = saved_errno; /* Ignore ENOSYS */

	} else if (new_mode) {

		int ret = -1;

		/* Attributes need changing. File already existed. */

		{
			int saved_errno = errno; /* We might get ENOSYS in the next call.. */
			ret = SMB_VFS_FCHMOD_ACL(fsp, fsp->fd, new_mode);

			if (ret == -1 && errno == ENOSYS) {
				errno = saved_errno; /* Ignore ENOSYS */
			} else {
				DEBUG(5, ("open_file_shared: failed to reset attributes of file %s to 0%o\n",
					fname, (int)new_mode));
				ret = 0; /* Don't do the fchmod below. */
			}
		}

		if ((ret == -1) && (SMB_VFS_FCHMOD(fsp, fsp->fd, new_mode) == -1))
			DEBUG(5, ("open_file_shared: failed to reset attributes of file %s to 0%o\n",
				fname, (int)new_mode));
	}

	unlock_share_entry_fsp(fsp);

	conn->num_files_open++;

	return fsp;
}

/****************************************************************************
 Open a file for for write to ensure that we can fchmod it.
****************************************************************************/

files_struct *open_file_fchmod(connection_struct *conn, const char *fname, SMB_STRUCT_STAT *psbuf)
{
	files_struct *fsp = NULL;
	BOOL fsp_open;

	if (!VALID_STAT(*psbuf))
		return NULL;

	fsp = file_new(conn);
	if(!fsp)
		return NULL;

	/* note! we must use a non-zero desired access or we don't get
           a real file descriptor. Oh what a twisted web we weave. */
	fsp_open = open_file(fsp,conn,fname,psbuf,O_WRONLY,0,FILE_WRITE_DATA);

	/* 
	 * This is not a user visible file open.
	 * Don't set a share mode and don't increment
	 * the conn->num_files_open.
	 */

	if (!fsp_open) {
		file_free(fsp);
		return NULL;
	}

	return fsp;
}

/****************************************************************************
 Close the fchmod file fd - ensure no locks are lost.
****************************************************************************/

int close_file_fchmod(files_struct *fsp)
{
	int ret = fd_close(fsp->conn, fsp);
	file_free(fsp);
	return ret;
}

/****************************************************************************
 Open a directory from an NT SMB call.
****************************************************************************/

files_struct *open_directory(connection_struct *conn, char *fname, SMB_STRUCT_STAT *psbuf,
			uint32 desired_access, int share_mode, int smb_ofun, mode_t unixmode, int *action)
{
	extern struct current_user current_user;
	BOOL got_stat = False;
	files_struct *fsp = file_new(conn);
	BOOL delete_on_close = GET_DELETE_ON_CLOSE_FLAG(share_mode);

	if(!fsp)
		return NULL;

	if (VALID_STAT(*psbuf))
		got_stat = True;

	if (got_stat && (GET_FILE_OPEN_DISPOSITION(smb_ofun) == FILE_EXISTS_FAIL)) {
		file_free(fsp);
		errno = EEXIST; /* Setup so correct error is returned to client. */
		return NULL;
	}

	if (GET_FILE_CREATE_DISPOSITION(smb_ofun) == FILE_CREATE_IF_NOT_EXIST) {

		if (got_stat) {

			if(!S_ISDIR(psbuf->st_mode)) {
				DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
				file_free(fsp);
				errno = EACCES;
				return NULL;
			}
			*action = FILE_WAS_OPENED;

		} else {

			/*
			 * Try and create the directory.
			 */

			if(!CAN_WRITE(conn)) {
				DEBUG(2,("open_directory: failing create on read-only share\n"));
				file_free(fsp);
				errno = EACCES;
				return NULL;
			}

			if (ms_has_wild(fname))  {
				file_free(fsp);
				DEBUG(5,("open_directory: failing create on filename %s with wildcards\n", fname));
				unix_ERR_class = ERRDOS;
				unix_ERR_code = ERRinvalidname;
				unix_ERR_ntstatus = NT_STATUS_OBJECT_NAME_INVALID;
				return NULL;
			}

			if(vfs_MkDir(conn,fname, unix_mode(conn,aDIR, fname)) < 0) {
				DEBUG(2,("open_directory: unable to create %s. Error was %s\n",
					 fname, strerror(errno) ));
				file_free(fsp);
				return NULL;
			}

			if(SMB_VFS_STAT(conn,fname, psbuf) != 0) {
				file_free(fsp);
				return NULL;
			}

			*action = FILE_WAS_CREATED;

		}
	} else {

		/*
		 * Don't create - just check that it *was* a directory.
		 */

		if(!got_stat) {
			DEBUG(3,("open_directory: unable to stat name = %s. Error was %s\n",
				 fname, strerror(errno) ));
			file_free(fsp);
			return NULL;
		}

		if(!S_ISDIR(psbuf->st_mode)) {
			DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
			file_free(fsp);
			return NULL;
		}

		*action = FILE_WAS_OPENED;
	}
	
	DEBUG(5,("open_directory: opening directory %s\n", fname));

	/*
	 * Setup the files_struct for it.
	 */
	
	fsp->mode = psbuf->st_mode;
	fsp->inode = psbuf->st_ino;
	fsp->dev = psbuf->st_dev;
	fsp->size = psbuf->st_size;
	fsp->vuid = current_user.vuid;
	fsp->pos = -1;
	fsp->can_lock = True;
	fsp->can_read = False;
	fsp->can_write = False;
	fsp->share_mode = share_mode;
	fsp->desired_access = desired_access;
	fsp->print_file = False;
	fsp->modified = False;
	fsp->oplock_type = NO_OPLOCK;
	fsp->sent_oplock_break = NO_BREAK_SENT;
	fsp->is_directory = True;
	fsp->is_stat = False;
	fsp->directory_delete_on_close = False;
	string_set(&fsp->fsp_name,fname);

	if (delete_on_close) {
		NTSTATUS result = set_delete_on_close_internal(fsp, delete_on_close);

		if (NT_STATUS_V(result) !=  NT_STATUS_V(NT_STATUS_OK)) {
			file_free(fsp);
			return NULL;
		}
	}
	conn->num_files_open++;

	return fsp;
}

/****************************************************************************
 Open a pseudo-file (no locking checks - a 'stat' open).
****************************************************************************/

files_struct *open_file_stat(connection_struct *conn, char *fname, SMB_STRUCT_STAT *psbuf)
{
	extern struct current_user current_user;
	files_struct *fsp = NULL;

	if (!VALID_STAT(*psbuf))
		return NULL;

	/* Can't 'stat' open directories. */
	if(S_ISDIR(psbuf->st_mode))
		return NULL;

	fsp = file_new(conn);
	if(!fsp)
		return NULL;

	DEBUG(5,("open_file_stat: 'opening' file %s\n", fname));

	/*
	 * Setup the files_struct for it.
	 */
	
	fsp->mode = psbuf->st_mode;
	/* 
	 * Don't store dev or inode, we don't want any iterator
	 * to see this.
	 */
	fsp->inode = (SMB_INO_T)0;
	fsp->dev = (SMB_DEV_T)0;
	fsp->size = psbuf->st_size;
	fsp->vuid = current_user.vuid;
	fsp->pos = -1;
	fsp->can_lock = False;
	fsp->can_read = False;
	fsp->can_write = False;
	fsp->share_mode = 0;
	fsp->desired_access = 0;
	fsp->print_file = False;
	fsp->modified = False;
	fsp->oplock_type = NO_OPLOCK;
	fsp->sent_oplock_break = NO_BREAK_SENT;
	fsp->is_directory = False;
	fsp->is_stat = True;
	fsp->directory_delete_on_close = False;
	string_set(&fsp->fsp_name,fname);

	conn->num_files_open++;

	return fsp;
}