summaryrefslogtreecommitdiff
path: root/source3/lib/system.c
blob: 3daa041a277e13d229d5d339e108ae109aa7dc93 (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
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
/* 
   Unix SMB/CIFS implementation.
   Samba system utilities
   Copyright (C) Andrew Tridgell 1992-1998
   Copyright (C) Jeremy Allison  1998-2005
   Copyright (C) Timur Bakeyev        2005
   Copyright (C) Bjoern Jacke    2006-2007

   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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "system/syslog.h"
#include "system/capability.h"
#include "system/passwd.h"
#include "system/filesys.h"

#ifdef HAVE_SYS_SYSCTL_H
#include <sys/sysctl.h>
#endif

#ifdef HAVE_SYS_PRCTL_H
#include <sys/prctl.h>
#endif

/*
   The idea is that this file will eventually have wrappers around all
   important system calls in samba. The aims are:

   - to enable easier porting by putting OS dependent stuff in here

   - to allow for hooks into other "pseudo-filesystems"

   - to allow easier integration of things like the japanese extensions

   - to support the philosophy of Samba to expose the features of
     the OS within the SMB model. In general whatever file/printer/variable
     expansions/etc make sense to the OS should be acceptable to Samba.
*/



/*******************************************************************
A read wrapper that will deal with EINTR.
********************************************************************/

ssize_t sys_read(int fd, void *buf, size_t count)
{
	ssize_t ret;

	do {
		ret = read(fd, buf, count);
#if defined(EWOULDBLOCK)
	} while (ret == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
#else
	} while (ret == -1 && (errno == EINTR || errno == EAGAIN));
#endif
	return ret;
}

/*******************************************************************
A write wrapper that will deal with EINTR.
********************************************************************/

ssize_t sys_write(int fd, const void *buf, size_t count)
{
	ssize_t ret;

	do {
		ret = write(fd, buf, count);
#if defined(EWOULDBLOCK)
	} while (ret == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
#else
	} while (ret == -1 && (errno == EINTR || errno == EAGAIN));
#endif
	return ret;
}

/*******************************************************************
A writev wrapper that will deal with EINTR.
********************************************************************/

ssize_t sys_writev(int fd, const struct iovec *iov, int iovcnt)
{
	ssize_t ret;

#if 0
	/* Try to confuse write_data_iov a bit */
	if ((random() % 5) == 0) {
		return sys_write(fd, iov[0].iov_base, iov[0].iov_len);
	}
	if (iov[0].iov_len > 1) {
		return sys_write(fd, iov[0].iov_base,
				 (random() % (iov[0].iov_len-1)) + 1);
	}
#endif

	do {
		ret = writev(fd, iov, iovcnt);
#if defined(EWOULDBLOCK)
	} while (ret == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
#else
	} while (ret == -1 && (errno == EINTR || errno == EAGAIN));
#endif
	return ret;
}

/*******************************************************************
A pread wrapper that will deal with EINTR
********************************************************************/

#if defined(HAVE_PREAD)
ssize_t sys_pread(int fd, void *buf, size_t count, off_t off)
{
	ssize_t ret;

	do {
		ret = pread(fd, buf, count, off);
	} while (ret == -1 && errno == EINTR);
	return ret;
}
#endif

/*******************************************************************
A write wrapper that will deal with EINTR
********************************************************************/

#if defined(HAVE_PWRITE)
ssize_t sys_pwrite(int fd, const void *buf, size_t count, off_t off)
{
	ssize_t ret;

	do {
		ret = pwrite(fd, buf, count, off);
	} while (ret == -1 && errno == EINTR);
	return ret;
}
#endif

/*******************************************************************
A send wrapper that will deal with EINTR or EAGAIN or EWOULDBLOCK.
********************************************************************/

ssize_t sys_send(int s, const void *msg, size_t len, int flags)
{
	ssize_t ret;

	do {
		ret = send(s, msg, len, flags);
#if defined(EWOULDBLOCK)
	} while (ret == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
#else
	} while (ret == -1 && (errno == EINTR || errno == EAGAIN));
#endif
	return ret;
}

/*******************************************************************
A recvfrom wrapper that will deal with EINTR.
********************************************************************/

ssize_t sys_recvfrom(int s, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen)
{
	ssize_t ret;

	do {
		ret = recvfrom(s, buf, len, flags, from, fromlen);
#if defined(EWOULDBLOCK)
	} while (ret == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
#else
	} while (ret == -1 && (errno == EINTR || errno == EAGAIN));
#endif
	return ret;
}

/*******************************************************************
A fcntl wrapper that will deal with EINTR.
********************************************************************/

int sys_fcntl_ptr(int fd, int cmd, void *arg)
{
	int ret;

	do {
		ret = fcntl(fd, cmd, arg);
	} while (ret == -1 && errno == EINTR);
	return ret;
}

/*******************************************************************
A fcntl wrapper that will deal with EINTR.
********************************************************************/

int sys_fcntl_long(int fd, int cmd, long arg)
{
	int ret;

	do {
		ret = fcntl(fd, cmd, arg);
	} while (ret == -1 && errno == EINTR);
	return ret;
}

/****************************************************************************
 Get/Set all the possible time fields from a stat struct as a timespec.
****************************************************************************/

static struct timespec get_atimespec(const struct stat *pst)
{
#if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
	struct timespec ret;

	/* Old system - no ns timestamp. */
	ret.tv_sec = pst->st_atime;
	ret.tv_nsec = 0;
	return ret;
#else
#if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC)
	return pst->st_atim;
#elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC)
	struct timespec ret;
	ret.tv_sec = pst->st_atime;
	ret.tv_nsec = pst->st_atimensec;
	return ret;
#elif defined(HAVE_STRUCT_STAT_ST_MTIME_N)
	struct timespec ret;
	ret.tv_sec = pst->st_atime;
	ret.tv_nsec = pst->st_atime_n;
	return ret;
#elif defined(HAVE_STRUCT_STAT_ST_UMTIME)
	struct timespec ret;
	ret.tv_sec = pst->st_atime;
	ret.tv_nsec = pst->st_uatime * 1000;
	return ret;
#elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC)
	return pst->st_atimespec;
#else
#error	CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
#endif
#endif
}

static struct timespec get_mtimespec(const struct stat *pst)
{
#if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
	struct timespec ret;

	/* Old system - no ns timestamp. */
	ret.tv_sec = pst->st_mtime;
	ret.tv_nsec = 0;
	return ret;
#else
#if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC)
	return pst->st_mtim;
#elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC)
	struct timespec ret;
	ret.tv_sec = pst->st_mtime;
	ret.tv_nsec = pst->st_mtimensec;
	return ret;
#elif defined(HAVE_STRUCT_STAT_ST_MTIME_N)
	struct timespec ret;
	ret.tv_sec = pst->st_mtime;
	ret.tv_nsec = pst->st_mtime_n;
	return ret;
#elif defined(HAVE_STRUCT_STAT_ST_UMTIME)
	struct timespec ret;
	ret.tv_sec = pst->st_mtime;
	ret.tv_nsec = pst->st_umtime * 1000;
	return ret;
#elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC)
	return pst->st_mtimespec;
#else
#error	CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
#endif
#endif
}

static struct timespec get_ctimespec(const struct stat *pst)
{
#if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
	struct timespec ret;

	/* Old system - no ns timestamp. */
	ret.tv_sec = pst->st_ctime;
	ret.tv_nsec = 0;
	return ret;
#else
#if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC)
	return pst->st_ctim;
#elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC)
	struct timespec ret;
	ret.tv_sec = pst->st_ctime;
	ret.tv_nsec = pst->st_ctimensec;
	return ret;
#elif defined(HAVE_STRUCT_STAT_ST_MTIME_N)
	struct timespec ret;
	ret.tv_sec = pst->st_ctime;
	ret.tv_nsec = pst->st_ctime_n;
	return ret;
#elif defined(HAVE_STRUCT_STAT_ST_UMTIME)
	struct timespec ret;
	ret.tv_sec = pst->st_ctime;
	ret.tv_nsec = pst->st_uctime * 1000;
	return ret;
#elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC)
	return pst->st_ctimespec;
#else
#error	CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
#endif
#endif
}

/****************************************************************************
 Return the best approximation to a 'create time' under UNIX from a stat
 structure.
****************************************************************************/

static struct timespec calc_create_time_stat(const struct stat *st)
{
	struct timespec ret, ret1;
	struct timespec c_time = get_ctimespec(st);
	struct timespec m_time = get_mtimespec(st);
	struct timespec a_time = get_atimespec(st);

	ret = timespec_compare(&c_time, &m_time) < 0 ? c_time : m_time;
	ret1 = timespec_compare(&ret, &a_time) < 0 ? ret : a_time;

	if(!null_timespec(ret1)) {
		return ret1;
	}

	/*
	 * One of ctime, mtime or atime was zero (probably atime).
	 * Just return MIN(ctime, mtime).
	 */
	return ret;
}

/****************************************************************************
 Return the best approximation to a 'create time' under UNIX from a stat_ex
 structure.
****************************************************************************/

static struct timespec calc_create_time_stat_ex(const struct stat_ex *st)
{
	struct timespec ret, ret1;
	struct timespec c_time = st->st_ex_ctime;
	struct timespec m_time = st->st_ex_mtime;
	struct timespec a_time = st->st_ex_atime;

	ret = timespec_compare(&c_time, &m_time) < 0 ? c_time : m_time;
	ret1 = timespec_compare(&ret, &a_time) < 0 ? ret : a_time;

	if(!null_timespec(ret1)) {
		return ret1;
	}

	/*
	 * One of ctime, mtime or atime was zero (probably atime).
	 * Just return MIN(ctime, mtime).
	 */
	return ret;
}

/****************************************************************************
 Return the 'create time' from a stat struct if it exists (birthtime) or else
 use the best approximation.
****************************************************************************/

static void make_create_timespec(const struct stat *pst, struct stat_ex *dst,
				 bool fake_dir_create_times)
{
	if (S_ISDIR(pst->st_mode) && fake_dir_create_times) {
		dst->st_ex_btime.tv_sec = 315493200L;          /* 1/1/1980 */
		dst->st_ex_btime.tv_nsec = 0;
	}

	dst->st_ex_calculated_birthtime = false;

#if defined(HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC)
	dst->st_ex_btime = pst->st_birthtimespec;
#elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC)
	dst->st_ex_btime.tv_sec = pst->st_birthtime;
	dst->st_ex_btime.tv_nsec = pst->st_birthtimenspec;
#elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIME)
	dst->st_ex_btime.tv_sec = pst->st_birthtime;
	dst->st_ex_btime.tv_nsec = 0;
#else
	dst->st_ex_btime = calc_create_time_stat(pst);
	dst->st_ex_calculated_birthtime = true;
#endif

	/* Deal with systems that don't initialize birthtime correctly.
	 * Pointed out by SATOH Fumiyasu <fumiyas@osstech.jp>.
	 */
	if (null_timespec(dst->st_ex_btime)) {
		dst->st_ex_btime = calc_create_time_stat(pst);
		dst->st_ex_calculated_birthtime = true;
	}
}

/****************************************************************************
 If we update a timestamp in a stat_ex struct we may have to recalculate
 the birthtime. For now only implement this for write time, but we may
 also need to do it for atime and ctime. JRA.
****************************************************************************/

void update_stat_ex_mtime(struct stat_ex *dst,
				struct timespec write_ts)
{
	dst->st_ex_mtime = write_ts;

	/* We may have to recalculate btime. */
	if (dst->st_ex_calculated_birthtime) {
		dst->st_ex_btime = calc_create_time_stat_ex(dst);
	}
}

void update_stat_ex_create_time(struct stat_ex *dst,
                                struct timespec create_time)
{
	dst->st_ex_btime = create_time;
	dst->st_ex_calculated_birthtime = false;
}

void init_stat_ex_from_stat (struct stat_ex *dst,
			    const struct stat *src,
			    bool fake_dir_create_times)
{
	dst->st_ex_dev = src->st_dev;
	dst->st_ex_ino = src->st_ino;
	dst->st_ex_mode = src->st_mode;
	dst->st_ex_nlink = src->st_nlink;
	dst->st_ex_uid = src->st_uid;
	dst->st_ex_gid = src->st_gid;
	dst->st_ex_rdev = src->st_rdev;
	dst->st_ex_size = src->st_size;
	dst->st_ex_atime = get_atimespec(src);
	dst->st_ex_mtime = get_mtimespec(src);
	dst->st_ex_ctime = get_ctimespec(src);
	make_create_timespec(src, dst, fake_dir_create_times);
#ifdef HAVE_STAT_ST_BLKSIZE
	dst->st_ex_blksize = src->st_blksize;
#else
	dst->st_ex_blksize = STAT_ST_BLOCKSIZE;
#endif

#ifdef HAVE_STAT_ST_BLOCKS
	dst->st_ex_blocks = src->st_blocks;
#else
	dst->st_ex_blocks = src->st_size / dst->st_ex_blksize + 1;
#endif

#ifdef HAVE_STAT_ST_FLAGS
	dst->st_ex_flags = src->st_flags;
#else
	dst->st_ex_flags = 0;
#endif
}

/*******************************************************************
A stat() wrapper.
********************************************************************/

int sys_stat(const char *fname, SMB_STRUCT_STAT *sbuf,
	     bool fake_dir_create_times)
{
	int ret;
	struct stat statbuf;
	ret = stat(fname, &statbuf);
	if (ret == 0) {
		/* we always want directories to appear zero size */
		if (S_ISDIR(statbuf.st_mode)) {
			statbuf.st_size = 0;
		}
		init_stat_ex_from_stat(sbuf, &statbuf, fake_dir_create_times);
	}
	return ret;
}

/*******************************************************************
 An fstat() wrapper.
********************************************************************/

int sys_fstat(int fd, SMB_STRUCT_STAT *sbuf, bool fake_dir_create_times)
{
	int ret;
	struct stat statbuf;
	ret = fstat(fd, &statbuf);
	if (ret == 0) {
		/* we always want directories to appear zero size */
		if (S_ISDIR(statbuf.st_mode)) {
			statbuf.st_size = 0;
		}
		init_stat_ex_from_stat(sbuf, &statbuf, fake_dir_create_times);
	}
	return ret;
}

/*******************************************************************
 An lstat() wrapper.
********************************************************************/

int sys_lstat(const char *fname,SMB_STRUCT_STAT *sbuf,
	      bool fake_dir_create_times)
{
	int ret;
	struct stat statbuf;
	ret = lstat(fname, &statbuf);
	if (ret == 0) {
		/* we always want directories to appear zero size */
		if (S_ISDIR(statbuf.st_mode)) {
			statbuf.st_size = 0;
		}
		init_stat_ex_from_stat(sbuf, &statbuf, fake_dir_create_times);
	}
	return ret;
}

/*******************************************************************
 An posix_fallocate() wrapper.
********************************************************************/
int sys_posix_fallocate(int fd, off_t offset, off_t len)
{
#if defined(HAVE_POSIX_FALLOCATE) && !defined(HAVE_BROKEN_POSIX_FALLOCATE)
	return posix_fallocate(fd, offset, len);
#elif defined(F_RESVSP64)
	/* this handles XFS on IRIX */
	struct flock64 fl;
	off_t new_len = offset + len;
	int ret;
	struct stat64 sbuf;

	/* unlikely to get a too large file on a 64bit system but ... */
	if (new_len < 0)
		return EFBIG;

	fl.l_whence = SEEK_SET;
	fl.l_start = offset;
	fl.l_len = len;

	ret=fcntl(fd, F_RESVSP64, &fl);

	if (ret != 0)
		return errno;

	/* Make sure the file gets enlarged after we allocated space: */
	fstat64(fd, &sbuf);
	if (new_len > sbuf.st_size)
		ftruncate64(fd, new_len);
	return 0;
#else
	return ENOSYS;
#endif
}

/*******************************************************************
 An fallocate() function that matches the semantics of the Linux one.
********************************************************************/

#ifdef HAVE_LINUX_FALLOC_H
#include <linux/falloc.h>
#endif

int sys_fallocate(int fd, enum vfs_fallocate_mode mode, off_t offset, off_t len)
{
#if defined(HAVE_LINUX_FALLOCATE64) || defined(HAVE_LINUX_FALLOCATE)
	int lmode;
	switch (mode) {
	case VFS_FALLOCATE_EXTEND_SIZE:
		lmode = 0;
		break;
	case VFS_FALLOCATE_KEEP_SIZE:
		lmode = FALLOC_FL_KEEP_SIZE;
		break;
	default:
		errno = EINVAL;
		return -1;
	}
#if defined(HAVE_LINUX_FALLOCATE)
	return fallocate(fd, lmode, offset, len);
#endif
#else
	/* TODO - plumb in fallocate from other filesysetms like VXFS etc. JRA. */
	errno = ENOSYS;
	return -1;
#endif
}

#if HAVE_KERNEL_SHARE_MODES
#ifndef LOCK_MAND
#define LOCK_MAND	32	/* This is a mandatory flock */
#define LOCK_READ	64	/* ... Which allows concurrent read operations */
#define LOCK_WRITE	128	/* ... Which allows concurrent write operations */
#define LOCK_RW		192	/* ... Which allows concurrent read & write ops */
#endif
#endif

/*******************************************************************
 A flock() wrapper that will perform the kernel flock.
********************************************************************/

void kernel_flock(int fd, uint32 share_mode, uint32 access_mask)
{
#if HAVE_KERNEL_SHARE_MODES
	int kernel_mode = 0;
	if (share_mode == FILE_SHARE_WRITE) {
		kernel_mode = LOCK_MAND|LOCK_WRITE;
	} else if (share_mode == FILE_SHARE_READ) {
		kernel_mode = LOCK_MAND|LOCK_READ;
	} else if (share_mode == FILE_SHARE_NONE) {
		kernel_mode = LOCK_MAND;
	}
	if (kernel_mode) {
		flock(fd, kernel_mode);
	}
#endif
	;
}



/*******************************************************************
 An fdopendir wrapper.
 Ugly hack - we need dirfd for this to work correctly in the
 calling code.. JRA.
********************************************************************/

DIR *sys_fdopendir(int fd)
{
#if defined(HAVE_FDOPENDIR) && defined(HAVE_DIRFD)
	return fdopendir(fd);
#else
	errno = ENOSYS;
	return NULL;
#endif
}

/*******************************************************************
 An mknod() wrapper.
********************************************************************/

int sys_mknod(const char *path, mode_t mode, SMB_DEV_T dev)
{
#if defined(HAVE_MKNOD)
	return mknod(path, mode, dev);
#else
	/* No mknod system call. */
	errno = ENOSYS;
	return -1;
#endif
}

/*******************************************************************
The wait() calls vary between systems
********************************************************************/

int sys_waitpid(pid_t pid,int *status,int options)
{
#ifdef HAVE_WAITPID
	return waitpid(pid,status,options);
#else /* HAVE_WAITPID */
	return wait4(pid, status, options, NULL);
#endif /* HAVE_WAITPID */
}

/*******************************************************************
 System wrapper for getwd. Always returns MALLOC'ed memory, or NULL
 on error (malloc fail usually).
********************************************************************/

char *sys_getwd(void)
{
#ifdef GETCWD_TAKES_NULL
	return getcwd(NULL, 0);
#elif HAVE_GETCWD
	char *wd = NULL, *s = NULL;
	size_t allocated = PATH_MAX;

	while (1) {
		s = SMB_REALLOC_ARRAY(s, char, allocated);
		if (s == NULL) {
			return NULL;
		}
		wd = getcwd(s, allocated);
		if (wd) {
			break;
		}
		if (errno != ERANGE) {
			SAFE_FREE(s);
			break;
		}
		allocated *= 2;
		if (allocated < PATH_MAX) {
			SAFE_FREE(s);
			break;
		}
	}
	return wd;
#else
	char *s = SMB_MALLOC_ARRAY(char, PATH_MAX);
	if (s == NULL) {
		return NULL;
	}
	return getwd(s);
#endif
}

#if defined(HAVE_POSIX_CAPABILITIES)

/**************************************************************************
 Try and abstract process capabilities (for systems that have them).
****************************************************************************/

/* Set the POSIX capabilities needed for the given purpose into the effective
 * capability set of the current process. Make sure they are always removed
 * from the inheritable set, because there is no circumstance in which our
 * children should inherit our elevated privileges.
 */
static bool set_process_capability(enum smbd_capability capability,
				   bool enable)
{
	cap_value_t cap_vals[2] = {0};
	int num_cap_vals = 0;

	cap_t cap;

#if defined(HAVE_PRCTL) && defined(PR_GET_KEEPCAPS) && defined(PR_SET_KEEPCAPS)
	/* On Linux, make sure that any capabilities we grab are sticky
	 * across UID changes. We expect that this would allow us to keep both
	 * the effective and permitted capability sets, but as of circa 2.6.16,
	 * only the permitted set is kept. It is a bug (which we work around)
	 * that the effective set is lost, but we still require the effective
	 * set to be kept.
	 */
	if (!prctl(PR_GET_KEEPCAPS)) {
		prctl(PR_SET_KEEPCAPS, 1);
	}
#endif

	cap = cap_get_proc();
	if (cap == NULL) {
		DEBUG(0,("set_process_capability: cap_get_proc failed: %s\n",
			strerror(errno)));
		return False;
	}

	switch (capability) {
		case KERNEL_OPLOCK_CAPABILITY:
#ifdef CAP_NETWORK_MGT
			/* IRIX has CAP_NETWORK_MGT for oplocks. */
			cap_vals[num_cap_vals++] = CAP_NETWORK_MGT;
#endif
			break;
		case DMAPI_ACCESS_CAPABILITY:
#ifdef CAP_DEVICE_MGT
			/* IRIX has CAP_DEVICE_MGT for DMAPI access. */
			cap_vals[num_cap_vals++] = CAP_DEVICE_MGT;
#elif CAP_MKNOD
			/* Linux has CAP_MKNOD for DMAPI access. */
			cap_vals[num_cap_vals++] = CAP_MKNOD;
#endif
			break;
		case LEASE_CAPABILITY:
#ifdef CAP_LEASE
			cap_vals[num_cap_vals++] = CAP_LEASE;
#endif
			break;
	}

	SMB_ASSERT(num_cap_vals <= ARRAY_SIZE(cap_vals));

	if (num_cap_vals == 0) {
		cap_free(cap);
		return True;
	}

	cap_set_flag(cap, CAP_EFFECTIVE, num_cap_vals, cap_vals,
		enable ? CAP_SET : CAP_CLEAR);

	/* We never want to pass capabilities down to our children, so make
	 * sure they are not inherited.
	 */
	cap_set_flag(cap, CAP_INHERITABLE, num_cap_vals, cap_vals, CAP_CLEAR);

	if (cap_set_proc(cap) == -1) {
		DEBUG(0, ("set_process_capability: cap_set_proc failed: %s\n",
			strerror(errno)));
		cap_free(cap);
		return False;
	}

	cap_free(cap);
	return True;
}

#endif /* HAVE_POSIX_CAPABILITIES */

/****************************************************************************
 Gain the oplock capability from the kernel if possible.
****************************************************************************/

void set_effective_capability(enum smbd_capability capability)
{
#if defined(HAVE_POSIX_CAPABILITIES)
	set_process_capability(capability, True);
#endif /* HAVE_POSIX_CAPABILITIES */
}

void drop_effective_capability(enum smbd_capability capability)
{
#if defined(HAVE_POSIX_CAPABILITIES)
	set_process_capability(capability, False);
#endif /* HAVE_POSIX_CAPABILITIES */
}

/**************************************************************************
 Wrapper for random().
****************************************************************************/

long sys_random(void)
{
#if defined(HAVE_RANDOM)
	return (long)random();
#elif defined(HAVE_RAND)
	return (long)rand();
#else
	DEBUG(0,("Error - no random function available !\n"));
	exit(1);
#endif
}

/**************************************************************************
 Wrapper for srandom().
****************************************************************************/

void sys_srandom(unsigned int seed)
{
#if defined(HAVE_SRANDOM)
	srandom(seed);
#elif defined(HAVE_SRAND)
	srand(seed);
#else
	DEBUG(0,("Error - no srandom function available !\n"));
	exit(1);
#endif
}

#ifndef NGROUPS_MAX
#define NGROUPS_MAX 32 /* Guess... */
#endif

/**************************************************************************
 Returns equivalent to NGROUPS_MAX - using sysconf if needed.
****************************************************************************/

int groups_max(void)
{
#if defined(SYSCONF_SC_NGROUPS_MAX)
	int ret = sysconf(_SC_NGROUPS_MAX);
	return (ret == -1) ? NGROUPS_MAX : ret;
#else
	return NGROUPS_MAX;
#endif
}

/**************************************************************************
 Wrap setgroups and getgroups for systems that declare getgroups() as
 returning an array of gid_t, but actuall return an array of int.
****************************************************************************/

#if defined(HAVE_BROKEN_GETGROUPS)

#ifdef HAVE_BROKEN_GETGROUPS
#define GID_T int
#else
#define GID_T gid_t
#endif

static int sys_broken_getgroups(int setlen, gid_t *gidset)
{
	GID_T gid;
	GID_T *group_list;
	int i, ngroups;

	if(setlen == 0) {
		return getgroups(setlen, &gid);
	}

	/*
	 * Broken case. We need to allocate a
	 * GID_T array of size setlen.
	 */

	if(setlen < 0) {
		errno = EINVAL; 
		return -1;
	} 

	if (setlen == 0)
		setlen = groups_max();

	if((group_list = SMB_MALLOC_ARRAY(GID_T, setlen)) == NULL) {
		DEBUG(0,("sys_getgroups: Malloc fail.\n"));
		return -1;
	}

	if((ngroups = getgroups(setlen, group_list)) < 0) {
		int saved_errno = errno;
		SAFE_FREE(group_list);
		errno = saved_errno;
		return -1;
	}

	for(i = 0; i < ngroups; i++)
		gidset[i] = (gid_t)group_list[i];

	SAFE_FREE(group_list);
	return ngroups;
}

static int sys_broken_setgroups(int setlen, gid_t *gidset)
{
	GID_T *group_list;
	int i ; 

	if (setlen == 0)
		return 0 ;

	if (setlen < 0 || setlen > groups_max()) {
		errno = EINVAL; 
		return -1;   
	}

	/*
	 * Broken case. We need to allocate a
	 * GID_T array of size setlen.
	 */

	if((group_list = SMB_MALLOC_ARRAY(GID_T, setlen)) == NULL) {
		DEBUG(0,("sys_setgroups: Malloc fail.\n"));
		return -1;    
	}

	for(i = 0; i < setlen; i++) 
		group_list[i] = (GID_T) gidset[i]; 

	if(setgroups(setlen, group_list) != 0) {
		int saved_errno = errno;
		SAFE_FREE(group_list);
		errno = saved_errno;
		return -1;
	}

	SAFE_FREE(group_list);
	return 0 ;
}

#endif /* HAVE_BROKEN_GETGROUPS */

/* This is a list of systems that require the first GID passed to setgroups(2)
 * to be the effective GID. If your system is one of these, add it here.
 */
#if defined (FREEBSD) || defined (DARWINOS)
#define USE_BSD_SETGROUPS
#endif

#if defined(USE_BSD_SETGROUPS)
/* Depending on the particular BSD implementation, the first GID that is
 * passed to setgroups(2) will either be ignored or will set the credential's
 * effective GID. In either case, the right thing to do is to guarantee that
 * gidset[0] is the effective GID.
 */
static int sys_bsd_setgroups(gid_t primary_gid, int setlen, const gid_t *gidset)
{
	gid_t *new_gidset = NULL;
	int max;
	int ret;

	/* setgroups(2) will fail with EINVAL if we pass too many groups. */
	max = groups_max();

	/* No group list, just make sure we are setting the efective GID. */
	if (setlen == 0) {
		return setgroups(1, &primary_gid);
	}

	/* If the primary gid is not the first array element, grow the array
	 * and insert it at the front.
	 */
	if (gidset[0] != primary_gid) {
	        new_gidset = SMB_MALLOC_ARRAY(gid_t, setlen + 1);
	        if (new_gidset == NULL) {
			return -1;
	        }

		memcpy(new_gidset + 1, gidset, (setlen * sizeof(gid_t)));
		new_gidset[0] = primary_gid;
		setlen++;
	}

	if (setlen > max) {
		DEBUG(3, ("forced to truncate group list from %d to %d\n",
			setlen, max));
		setlen = max;
	}

#if defined(HAVE_BROKEN_GETGROUPS)
	ret = sys_broken_setgroups(setlen, new_gidset ? new_gidset : gidset);
#else
	ret = setgroups(setlen, new_gidset ? new_gidset : gidset);
#endif

	if (new_gidset) {
		int errsav = errno;
		SAFE_FREE(new_gidset);
		errno = errsav;
	}

	return ret;
}

#endif /* USE_BSD_SETGROUPS */

/**************************************************************************
 Wrapper for getgroups. Deals with broken (int) case.
****************************************************************************/

int sys_getgroups(int setlen, gid_t *gidset)
{
#if defined(HAVE_BROKEN_GETGROUPS)
	return sys_broken_getgroups(setlen, gidset);
#else
	return getgroups(setlen, gidset);
#endif
}

/**************************************************************************
 Wrapper for setgroups. Deals with broken (int) case and BSD case.
****************************************************************************/

int sys_setgroups(gid_t UNUSED(primary_gid), int setlen, gid_t *gidset)
{
#if !defined(HAVE_SETGROUPS)
	errno = ENOSYS;
	return -1;
#endif /* HAVE_SETGROUPS */

#if defined(USE_BSD_SETGROUPS)
	return sys_bsd_setgroups(primary_gid, setlen, gidset);
#elif defined(HAVE_BROKEN_GETGROUPS)
	return sys_broken_setgroups(setlen, gidset);
#else
	return setgroups(setlen, gidset);
#endif
}

/**************************************************************************
 Extract a command into an arg list.
****************************************************************************/

static char **extract_args(TALLOC_CTX *mem_ctx, const char *command)
{
	char *trunc_cmd;
	char *saveptr;
	char *ptr;
	int argcl;
	char **argl = NULL;
	int i;

	if (!(trunc_cmd = talloc_strdup(mem_ctx, command))) {
		DEBUG(0, ("talloc failed\n"));
		goto nomem;
	}

	if(!(ptr = strtok_r(trunc_cmd, " \t", &saveptr))) {
		TALLOC_FREE(trunc_cmd);
		errno = EINVAL;
		return NULL;
	}

	/*
	 * Count the args.
	 */

	for( argcl = 1; ptr; ptr = strtok_r(NULL, " \t", &saveptr))
		argcl++;

	TALLOC_FREE(trunc_cmd);

	if (!(argl = talloc_array(mem_ctx, char *, argcl + 1))) {
		goto nomem;
	}

	/*
	 * Now do the extraction.
	 */

	if (!(trunc_cmd = talloc_strdup(mem_ctx, command))) {
		goto nomem;
	}

	ptr = strtok_r(trunc_cmd, " \t", &saveptr);
	i = 0;

	if (!(argl[i++] = talloc_strdup(argl, ptr))) {
		goto nomem;
	}

	while((ptr = strtok_r(NULL, " \t", &saveptr)) != NULL) {

		if (!(argl[i++] = talloc_strdup(argl, ptr))) {
			goto nomem;
		}
	}

	argl[i++] = NULL;
	TALLOC_FREE(trunc_cmd);
	return argl;

 nomem:
	DEBUG(0, ("talloc failed\n"));
	TALLOC_FREE(trunc_cmd);
	TALLOC_FREE(argl);
	errno = ENOMEM;
	return NULL;
}

/**************************************************************************
 Wrapper for popen. Safer as it doesn't search a path.
 Modified from the glibc sources.
 modified by tridge to return a file descriptor. We must kick our FILE* habit
****************************************************************************/

typedef struct _popen_list
{
	int fd;
	pid_t child_pid;
	struct _popen_list *next;
} popen_list;

static popen_list *popen_chain;

int sys_popen(const char *command)
{
	int parent_end, child_end;
	int pipe_fds[2];
	popen_list *entry = NULL;
	char **argl = NULL;

	if (pipe(pipe_fds) < 0)
		return -1;

	parent_end = pipe_fds[0];
	child_end = pipe_fds[1];

	if (!*command) {
		errno = EINVAL;
		goto err_exit;
	}

	if((entry = SMB_MALLOC_P(popen_list)) == NULL)
		goto err_exit;

	ZERO_STRUCTP(entry);

	/*
	 * Extract the command and args into a NULL terminated array.
	 */

	if(!(argl = extract_args(NULL, command)))
		goto err_exit;

	entry->child_pid = fork();

	if (entry->child_pid == -1) {
		goto err_exit;
	}

	if (entry->child_pid == 0) {

		/*
		 * Child !
		 */

		int child_std_end = STDOUT_FILENO;
		popen_list *p;

		close(parent_end);
		if (child_end != child_std_end) {
			dup2 (child_end, child_std_end);
			close (child_end);
		}

		/*
		 * POSIX.2:  "popen() shall ensure that any streams from previous
		 * popen() calls that remain open in the parent process are closed
		 * in the new child process."
		 */

		for (p = popen_chain; p; p = p->next)
			close(p->fd);

		execv(argl[0], argl);
		_exit (127);
	}

	/*
	 * Parent.
	 */

	close (child_end);
	TALLOC_FREE(argl);

	/* Link into popen_chain. */
	entry->next = popen_chain;
	popen_chain = entry;
	entry->fd = parent_end;

	return entry->fd;

err_exit:

	SAFE_FREE(entry);
	TALLOC_FREE(argl);
	close(pipe_fds[0]);
	close(pipe_fds[1]);
	return -1;
}

/**************************************************************************
 Wrapper for pclose. Modified from the glibc sources.
****************************************************************************/

int sys_pclose(int fd)
{
	int wstatus;
	popen_list **ptr = &popen_chain;
	popen_list *entry = NULL;
	pid_t wait_pid;
	int status = -1;

	/* Unlink from popen_chain. */
	for ( ; *ptr != NULL; ptr = &(*ptr)->next) {
		if ((*ptr)->fd == fd) {
			entry = *ptr;
			*ptr = (*ptr)->next;
			status = 0;
			break;
		}
	}

	if (status < 0 || close(entry->fd) < 0)
		return -1;

	/*
	 * As Samba is catching and eating child process
	 * exits we don't really care about the child exit
	 * code, a -1 with errno = ECHILD will do fine for us.
	 */

	do {
		wait_pid = sys_waitpid (entry->child_pid, &wstatus, 0);
	} while (wait_pid == -1 && errno == EINTR);

	SAFE_FREE(entry);

	if (wait_pid == -1)
		return -1;
	return wstatus;
}

/**************************************************************************
 Wrapper for Admin Logs.
****************************************************************************/

 void sys_adminlog(int priority, const char *format_str, ...) 
{
	va_list ap;
	int ret;
	char *msgbuf = NULL;

	va_start( ap, format_str );
	ret = vasprintf( &msgbuf, format_str, ap );
	va_end( ap );

	if (ret == -1)
		return;

#if defined(HAVE_SYSLOG)
	syslog( priority, "%s", msgbuf );
#else
	DEBUG(0,("%s", msgbuf ));
#endif
	SAFE_FREE(msgbuf);
}

/****************************************************************************
 Return the major devicenumber for UNIX extensions.
****************************************************************************/

uint32 unix_dev_major(SMB_DEV_T dev)
{
#if defined(HAVE_DEVICE_MAJOR_FN)
        return (uint32)major(dev);
#else
        return (uint32)(dev >> 8);
#endif
}

/****************************************************************************
 Return the minor devicenumber for UNIX extensions.
****************************************************************************/

uint32 unix_dev_minor(SMB_DEV_T dev)
{
#if defined(HAVE_DEVICE_MINOR_FN)
        return (uint32)minor(dev);
#else
        return (uint32)(dev & 0xff);
#endif
}

#if 0
/*******************************************************************
 Return the number of CPUs.
********************************************************************/

int sys_get_number_of_cores(void)
{
	int ret = -1;

#if defined(HAVE_SYSCONF)
#if defined(_SC_NPROCESSORS_ONLN)
	ret = (int)sysconf(_SC_NPROCESSORS_ONLN);
#endif
#if defined(_SC_NPROCESSORS_CONF)
	if (ret < 1) {
		ret = (int)sysconf(_SC_NPROCESSORS_CONF);
	}
#endif
#elif defined(HAVE_SYSCTL) && defined(CTL_HW)
	int name[2];
	unsigned int len = sizeof(ret);

	name[0] = CTL_HW;
#if defined(HW_AVAILCPU)
	name[1] = HW_AVAILCPU;

	if (sysctl(name, 2, &ret, &len, NULL, 0) == -1) {
		ret = -1;
	}
#endif
#if defined(HW_NCPU)
	if(ret < 1) {
		name[0] = CTL_HW;
		name[1] = HW_NCPU;
		if (sysctl(nm, 2, &count, &len, NULL, 0) == -1) {
			ret = -1;
		}
	}
#endif
#endif
	if (ret < 1) {
		ret = 1;
	}
	return ret;
}
#endif

#if defined(HAVE_AIO)

/*******************************************************************
 An aio_read wrapper.
********************************************************************/

int sys_aio_read(SMB_STRUCT_AIOCB *aiocb)
{
#if defined(HAVE_AIO_READ)
        return aio_read(aiocb);
#else
	errno = ENOSYS;
	return -1;
#endif
}

/*******************************************************************
 An aio_write wrapper.
********************************************************************/

int sys_aio_write(SMB_STRUCT_AIOCB *aiocb)
{
#if defined(HAVE_AIO_WRITE)
        return aio_write(aiocb);
#else
	errno = ENOSYS;
	return -1;
#endif
}

/*******************************************************************
 An aio_return wrapper.
********************************************************************/

ssize_t sys_aio_return(SMB_STRUCT_AIOCB *aiocb)
{
#if defined(HAVE_AIO_RETURN)
        return aio_return(aiocb);
#else
	errno = ENOSYS;
	return -1;
#endif
}

/*******************************************************************
 An aio_cancel wrapper.
********************************************************************/

int sys_aio_cancel(int fd, SMB_STRUCT_AIOCB *aiocb)
{
#if defined(HAVE_AIO_CANCEL)
        return aio_cancel(fd, aiocb);
#else
	errno = ENOSYS;
	return -1;
#endif
}

/*******************************************************************
 An aio_error wrapper.
********************************************************************/

int sys_aio_error(const SMB_STRUCT_AIOCB *aiocb)
{
#if defined(HAVE_AIO_ERROR)
        return aio_error(aiocb);
#else
	errno = ENOSYS;
	return -1;
#endif
}

/*******************************************************************
 An aio_fsync wrapper.
********************************************************************/

int sys_aio_fsync(int op, SMB_STRUCT_AIOCB *aiocb)
{
#if defined(HAVE_AIO_FSYNC)
        return aio_fsync(op, aiocb);
#else
	errno = ENOSYS;
	return -1;
#endif
}

/*******************************************************************
 An aio_fsync wrapper.
********************************************************************/

int sys_aio_suspend(const SMB_STRUCT_AIOCB * const cblist[], int n, const struct timespec *timeout)
{
#if defined(HAVE_AIO_FSYNC)
        return aio_suspend(cblist, n, timeout);
#else
	errno = ENOSYS;
	return -1;
#endif
}
#else /* !HAVE_AIO */

int sys_aio_read(SMB_STRUCT_AIOCB *aiocb)
{
	errno = ENOSYS;
	return -1;
}

int sys_aio_write(SMB_STRUCT_AIOCB *aiocb)
{
	errno = ENOSYS;
	return -1;
}

ssize_t sys_aio_return(SMB_STRUCT_AIOCB *aiocb)
{
	errno = ENOSYS;
	return -1;
}

int sys_aio_cancel(int fd, SMB_STRUCT_AIOCB *aiocb)
{
	errno = ENOSYS;
	return -1;
}

int sys_aio_error(const SMB_STRUCT_AIOCB *aiocb)
{
	errno = ENOSYS;
	return -1;
}

int sys_aio_fsync(int op, SMB_STRUCT_AIOCB *aiocb)
{
	errno = ENOSYS;
	return -1;
}

int sys_aio_suspend(const SMB_STRUCT_AIOCB * const cblist[], int n, const struct timespec *timeout)
{
	errno = ENOSYS;
	return -1;
}
#endif /* HAVE_AIO */