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
|
/* fhandler.cc. See console.cc for fhandler_console functions.
Copyright 1996, 1997, 1998, 1999, 2000 Cygnus Solutions.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include <sys/fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include "winsup.h"
static NO_COPY const int CHUNK_SIZE = 1024; /* Used for crlf conversions */
static char fhandler_disk_dummy_name[] = "some disk file";
int
fhandler_base::puts_readahead (const char *s, size_t len = (size_t) -1)
{
int success = 1;
while ((*s || (len != (size_t) -1 && len--))
&& (success = put_readahead (*s++) > 0))
continue;
return success;
}
int
fhandler_base::put_readahead (char value)
{
char *newrabuf;
if (raixput < rabuflen)
/* Nothing to do */;
else if ((newrabuf = (char *) realloc (rabuf, rabuflen += 32)))
rabuf = newrabuf;
else
return 0;
rabuf[raixput++] = value;
ralen++;
return 1;
}
int
fhandler_base::get_readahead ()
{
int chret = -1;
if (raixget < ralen)
chret = ((unsigned char)rabuf[raixget++]) & 0xff;
/* FIXME - not thread safe */
if (raixget >= ralen)
raixget = raixput = ralen = 0;
return chret;
}
int
fhandler_base::peek_readahead (int queryput)
{
int chret = -1;
if (!queryput && raixget < ralen)
chret = ((unsigned char) rabuf[raixget]) & 0xff;
else if (queryput && raixput > 0)
chret = ((unsigned char) rabuf[raixput - 1]) & 0xff;
return chret;
}
void
fhandler_base::set_readahead_valid (int val, int ch = -1)
{
if (!val)
ralen = raixget = raixput = 0;
if (ch != -1)
put_readahead(ch);
}
int
fhandler_base::eat_readahead (int n)
{
int oralen = ralen;
if (n < 0)
n = ralen;
if (n > 0 && ralen)
{
if ((int) (ralen -= n) < 0)
ralen = 0;
if (raixget >= ralen)
raixget = raixput = ralen = 0;
else if (raixput > ralen)
raixput = ralen;
}
return oralen;
}
int
fhandler_base::get_readahead_into_buffer (char *buf, size_t buflen)
{
int ch;
int copied_chars = 0;
while (buflen)
if ((ch = get_readahead ()) < 0)
break;
else
{
buf[copied_chars++] = (unsigned char)(ch & 0xff);
buflen--;
}
return copied_chars;
}
/**********************************************************************/
/* fhandler_base */
/* Record the file name.
Filenames are used mostly for debugging messages, and it's hoped that
in cases where the name is really required, the filename wouldn't ever
be too long (e.g. devices or some such).
*/
void
fhandler_base::set_name (const char *unix, const char *win32, int unit)
{
if (!no_free_names ())
{
if (unix_path_name_ != NULL && unix_path_name_ != fhandler_disk_dummy_name)
free (unix_path_name_);
if (win32_path_name_ != NULL && unix_path_name_ != fhandler_disk_dummy_name)
free (win32_path_name_);
}
unix_path_name_ = win32_path_name_ = NULL;
if (unix == NULL || !*unix)
return;
unix_path_name_ = strdup (unix);
if (unix_path_name_ == NULL)
{
system_printf ("fatal error. strdup failed");
exit (ENOMEM);
}
if (win32)
win32_path_name_ = strdup (win32);
else
{
const char *fmt = get_native_name ();
win32_path_name_ = (char *) malloc (strlen(fmt) + 16);
__small_sprintf (win32_path_name_, fmt, unit);
}
if (win32_path_name_ == NULL)
{
system_printf ("fatal error. strdup failed");
exit (ENOMEM);
}
}
/* Normal file i/o handlers. */
/* Cover function to ReadFile to achieve (as much as possible) Posix style
semantics and use of errno. */
int
fhandler_base::raw_read (void *ptr, size_t ulen)
{
DWORD bytes_read;
if (!ReadFile (get_handle(), ptr, ulen, &bytes_read, 0))
{
int errcode;
/* Some errors are not really errors. Detect such cases here. */
errcode = GetLastError ();
switch (errcode)
{
case ERROR_BROKEN_PIPE:
/* This is really EOF. */
bytes_read = 0;
break;
case ERROR_MORE_DATA:
/* `bytes_read' is supposedly valid. */
break;
default:
syscall_printf ("ReadFile %s failed, %E", unix_path_name_);
__seterrno_from_win_error (errcode);
return -1;
break;
}
}
return bytes_read;
}
int
fhandler_base::linearize (unsigned char *buf)
{
unsigned char *orig_buf = buf;
#define cbuf ((char *)buf)
strcpy (cbuf, get_name() ?: "");
char *p = strcpy (strchr (cbuf, '\0') + 1, get_win32_name ());
buf = (unsigned char *)memcpy (strchr (p, '\0') + 1, this, cb);
debug_printf ("access_ %p, status %p, io_handle %p, output_handle %p",
access_, status, get_io_handle (), get_output_handle ());
return (buf + cb) - orig_buf;
#undef cbuf
}
int
fhandler_base::de_linearize (const char *buf, const char *unix_name,
const char *win32_name)
{
int thiscb = cb;
memcpy(this, buf, cb);
unix_path_name_ = win32_path_name_ = NULL;
set_name (unix_name, win32_name);
debug_printf ("access_ %p, status %p, io_handle %p, output_handle %p",
access_, status, get_io_handle (), get_output_handle ());
if (thiscb != cb)
system_printf ("mismatch in linearize/delinearize %d != %d", thiscb, cb);
raixput = raixget = ralen = rabuflen = 0;
rabuf = NULL;
return cb;
}
/* Cover function to WriteFile to provide Posix interface and semantics
(as much as possible). */
int
fhandler_base::raw_write (const void *ptr, size_t len)
{
DWORD bytes_written;
if (!WriteFile (get_handle(), ptr, len, &bytes_written, 0))
{
if (GetLastError () == ERROR_DISK_FULL && bytes_written > 0)
return bytes_written;
__seterrno ();
if (get_errno () == EPIPE)
raise (SIGPIPE);
return -1;
}
return bytes_written;
}
/* Open system call handler function.
Path is now already checked for symlinks */
int
fhandler_base::open (int flags, mode_t mode)
{
int res = 0;
HANDLE x;
int file_attributes;
int shared;
int creation_distribution;
syscall_printf ("(%s, %p)", get_win32_name (), flags);
set_flags (flags);
if (get_win32_name () == NULL)
{
set_errno (ENOENT);
goto done;
}
if (get_device () == FH_TAPE)
{
access_ = GENERIC_READ | GENERIC_WRITE;
}
else if ((flags & (O_RDONLY | O_WRONLY | O_RDWR)) == O_RDONLY)
{
access_ = GENERIC_READ;
}
else if ((flags & (O_RDONLY | O_WRONLY | O_RDWR)) == O_WRONLY)
{
access_ = GENERIC_WRITE;
}
else
{
access_ = GENERIC_READ | GENERIC_WRITE;
}
/* FIXME: O_EXCL handling? */
if ((flags & O_TRUNC) && ((flags & O_ACCMODE) != O_RDONLY))
{
if (flags & O_CREAT)
{
creation_distribution = CREATE_ALWAYS;
}
else
{
creation_distribution = TRUNCATE_EXISTING;
}
}
else if (flags & O_CREAT)
creation_distribution = OPEN_ALWAYS;
else
creation_distribution = OPEN_EXISTING;
if ((flags & O_EXCL) && (flags & O_CREAT))
{
creation_distribution = CREATE_NEW;
}
if (flags & O_APPEND)
set_append_p();
/* These flags are host dependent. */
shared = host_dependent.shared;
file_attributes = FILE_ATTRIBUTE_NORMAL;
if (flags & O_DIROPEN)
file_attributes |= FILE_FLAG_BACKUP_SEMANTICS;
if (get_device () == FH_SERIAL)
file_attributes |= FILE_FLAG_OVERLAPPED;
x = CreateFileA (get_win32_name (), access_, shared,
&sec_none, creation_distribution,
file_attributes,
0);
syscall_printf ("%d = CreateFileA (%s, %p, %p, %p, %p, %p, 0)",
x,
get_win32_name (), access_, shared,
&sec_none, creation_distribution,
file_attributes);
if (x == INVALID_HANDLE_VALUE)
{
if (GetLastError () == ERROR_INVALID_HANDLE)
set_errno (ENOENT);
else
__seterrno ();
goto done;
}
// Attributes may be set only if a file is _really_ created.
if (flags & O_CREAT && get_device () == FH_DISK
&& GetLastError () != ERROR_ALREADY_EXISTS)
set_file_attribute (has_acls (), get_win32_name (), mode);
namehash_ = hash_path_name (0, get_win32_name ());
set_io_handle (x);
rpos_ = 0;
rsize_ = -1;
int bin;
if (flags & (O_BINARY | O_TEXT))
bin = flags & O_TEXT ? 0 : O_BINARY;
else if (get_device () == FH_DISK)
bin = get_w_binary () || get_r_binary ();
else
bin = (__fmode & O_BINARY) || get_w_binary () || get_r_binary ();
set_r_binary (bin);
set_w_binary (bin);
syscall_printf ("filemode set to %s", bin ? "binary" : "text");
if (get_device () != FH_TAPE
&& get_device () != FH_FLOPPY
&& get_device () != FH_SERIAL)
{
if (flags & O_APPEND)
SetFilePointer (get_handle(), 0, 0, FILE_END);
else
SetFilePointer (get_handle(), 0, 0, FILE_BEGIN);
}
res = 1;
done:
syscall_printf ("%d = fhandler_base::open (%s, %p)", res, get_win32_name (),
flags);
return res;
}
/* states:
open buffer in binary mode? Just do the read.
open buffer in text mode? Scan buffer for control zs and handle
the first one found. Then scan buffer, converting every \r\n into
an \n. If last char is an \r, look ahead one more char, if \n then
modify \r, if not, remember char.
*/
int
fhandler_base::read (void *in_ptr, size_t in_len)
{
int len = (int) in_len;
char *ctrlzpos;
char *ptr = (char *) in_ptr;
int c;
int copied_chars = 0;
while (len)
if ((c = get_readahead ()) < 0)
break;
else
{
ptr[copied_chars++] = (unsigned char) (c & 0xff);
len--;
}
if (len)
{
int readlen = raw_read (ptr + copied_chars, len);
if (copied_chars == 0)
copied_chars = readlen; /* Propagate error or EOF */
else if (readlen > 0) /* FIXME: should flag EOF for next read */
copied_chars += readlen;
}
if (copied_chars <= 0 || get_r_binary ())
return copied_chars;
/* Scan buffer for a control-z and shorten the buffer to that length */
ctrlzpos = (char *) memchr ((char *) ptr, 0x1a, copied_chars);
if (ctrlzpos)
{
lseek ((ctrlzpos - ((char *) ptr + copied_chars)), SEEK_CUR);
copied_chars = ctrlzpos - (char *) ptr;
}
if (copied_chars == 0)
return 0;
/* Scan buffer and turn \r\n into \n */
register char *src= (char *) ptr;
register char *dst = (char *) ptr;
register char *end = src + copied_chars - 1;
/* Read up to the last but one char - the last char needs special handling */
while (src < end)
{
*dst = *src++;
if (*dst != '\r' || *src != '\n')
dst++;
}
c = *src;
/* if last char is a '\r' then read one more to see if we should
translate this one too */
if (c == '\r')
{
char c1 = 0;
len = raw_read (&c1, 1);
if (len <= 0)
/* nothing */;
else if (c1 == '\n')
c = '\n';
else
set_readahead_valid (1, c1);
}
*dst++ = c;
copied_chars = dst - (char *) ptr;
rpos_ += copied_chars;
#ifndef NOSTRACE
if (strace.active)
{
char buf[16 * 6 + 1];
char *p = buf;
for (int i = 0; i < copied_chars && i < 16; ++i)
{
unsigned char c = ((unsigned char *) ptr)[i];
/* >= 33 so space prints in hex */
__small_sprintf (p, c >= 33 && c <= 127 ? " %c" : " %p", c);
p += strlen (p);
}
debug_printf ("read %d bytes (%s%s)", copied_chars, buf,
copied_chars > 16 ? " ..." : "");
}
#endif
return copied_chars;
}
int
fhandler_base::write (const void *ptr, size_t len)
{
int res;
if (get_append_p ())
SetFilePointer (get_handle(), 0, 0, FILE_END);
else if (os_being_run != winNT && get_check_win95_lseek_bug ())
{
/* Note: this bug doesn't happen on NT4, even though the documentation
for WriteFile() says that it *may* happen on any OS. */
int actual_length, current_position;
set_check_win95_lseek_bug (0); /* don't do it again */
actual_length = GetFileSize (get_handle (), NULL);
current_position = SetFilePointer (get_handle (), 0, 0, FILE_CURRENT);
if (current_position > actual_length)
{
/* Oops, this is the bug case - Win95 uses whatever is on the disk
instead of some known (safe) value, so we must seek back and
fill in the gap with zeros. - DJ */
char zeros[512];
int number_of_zeros_to_write = current_position - actual_length;
memset(zeros, 0, 512);
SetFilePointer (get_handle (), 0, 0, FILE_END);
while (number_of_zeros_to_write > 0)
{
DWORD zeros_this_time = (number_of_zeros_to_write > 512
? 512 : number_of_zeros_to_write);
DWORD written;
if (!WriteFile (get_handle (), zeros, zeros_this_time, &written,
NULL))
{
__seterrno ();
if (get_errno () == EPIPE)
raise (SIGPIPE);
/* This might fail, but it's the best we can hope for */
SetFilePointer (get_handle (), current_position, 0, FILE_BEGIN);
return -1;
}
if (written < zeros_this_time) /* just in case */
{
set_errno (ENOSPC);
/* This might fail, but it's the best we can hope for */
SetFilePointer (get_handle (), current_position, 0, FILE_BEGIN);
return -1;
}
number_of_zeros_to_write -= written;
}
}
}
if (get_w_binary ())
{
res = raw_write (ptr, len);
}
else
{
#ifdef NOTDEF
/* Keep track of previous \rs, we don't want to turn existing
\r\n's into \r\n\n's */
register int pr = 0;
/* Copy things in chunks */
char buf[CHUNK_SIZE];
for (unsigned int i = 0; i < len; i += sizeof (buf) / 2)
{
register const char *src = (char *)ptr + i;
int todo;
if ((todo = len - i) > sizeof (buf) / 2)
todo = sizeof (buf) / 2;
register const char *end = src + todo;
register char *dst = buf;
while (src < end)
{
if (*src == '\n' && !pr)
{
/* Emit a cr lf here */
*dst ++ = '\r';
*dst ++ = '\n';
}
else if (*src == '\r')
{
*dst ++ = '\r';
pr = 1;
}
else
{
*dst ++ = *src;
pr = 0;
}
src++;
}
int want = dst - buf;
if ((res = raw_write (buf, want)) != want)
{
if (res == -1)
return -1;
/* FIXME: */
/* Tricky... Didn't write everything we wanted.. How can
we work out exactly which chars were sent? We don't...
This will only happen in pretty nasty circumstances. */
rpos_ += i;
return i;
}
}
#else
/* This is the Microsoft/DJGPP way. Still not ideal, but it's
compatible. */
int left_in_data = len;
char *data = (char *)ptr;
while (left_in_data > 0)
{
char buf[CHUNK_SIZE], *buf_ptr = buf;
int left_in_buf = CHUNK_SIZE;
while (left_in_buf > 0 && left_in_data > 0)
{
if (*data == '\n')
{
if (left_in_buf == 1)
{
/* Not enough room for \r and \n */
break;
}
*buf_ptr++ = '\r';
left_in_buf--;
}
*buf_ptr++ = *data++;
left_in_buf--;
left_in_data--;
}
/* We've got a buffer-full, or we're out of data. Write it out */
int want = buf_ptr - buf;
if ((res = raw_write (buf, want)) != want)
{
if (res == -1)
return -1;
/* FIXME: */
/* Tricky... Didn't write everything we wanted.. How can
we work out exactly which chars were sent? We don't...
This will only happen in pretty nasty circumstances. */
int i = (len-left_in_data) - left_in_buf;
rpos_ += i;
/* just in case the math is off, guarantee it looks like
a disk full error */
if (i >= (int)len)
i = len-1;
if (i < 0)
i = 0;
return i;
}
}
#endif
/* Done everything, update by the chars that the user sent */
rpos_ += len;
/* Length of file has changed */
rsize_ = -1;
res = len;
debug_printf ("after write, name %s, rpos %d", unix_path_name_, rpos_);
}
return res;
}
off_t
fhandler_base::lseek (off_t offset, int whence)
{
off_t res;
/* Seeks on text files is tough, we rewind and read till we get to the
right place. */
if (whence != SEEK_CUR || offset != 0)
{
if (whence == SEEK_CUR)
offset -= ralen - raixget;
set_readahead_valid (0);
}
debug_printf ("lseek (%s, %d, %d)", unix_path_name_, offset, whence);
#if 0 /* lseek has no business messing about with text-mode stuff */
if (!get_r_binary ())
{
int newplace;
if (whence == 0)
{
newplace = offset;
}
else if (whence ==1)
{
newplace = rpos + offset;
}
else
{
/* Seek from the end of a file.. */
if (rsize == -1)
{
/* Find the size of the file by reading till the end */
char b[CHUNK_SIZE];
while (read (b, sizeof (b)) > 0)
;
rsize = rpos;
}
newplace = rsize + offset;
}
if (rpos > newplace)
{
SetFilePointer (handle, 0, 0, 0);
rpos = 0;
}
/* You can never shrink something more than 50% by turning CRLF into LF,
so we binary chop looking for the right place */
while (rpos < newplace)
{
char b[CHUNK_SIZE];
size_t span = (newplace - rpos) / 2;
if (span == 0)
span = 1;
if (span > sizeof (b))
span = sizeof (b);
debug_printf ("lseek (%s, %d, %d) span %d, rpos %d newplace %d",
name, offset, whence,span,rpos, newplace);
read (b, span);
}
debug_printf ("Returning %d", newplace);
return newplace;
}
#endif /* end of deleted code dealing with text mode */
DWORD win32_whence = whence == SEEK_SET ? FILE_BEGIN
: (whence == SEEK_CUR ? FILE_CURRENT : FILE_END);
res = SetFilePointer (get_handle(), offset, 0, win32_whence);
if (res == -1)
{
__seterrno ();
}
else
{
/* When next we write(), we will check to see if *this* seek went beyond
the end of the file, and back-seek and fill with zeros if so - DJ */
set_check_win95_lseek_bug ();
/* If this was a SEEK_CUR with offset 0, we still might have
readahead that we have to take into account when calculating
the actual position for the application. */
if (whence == SEEK_CUR)
res -= ralen - raixget;
}
return res;
}
int
fhandler_base::close (void)
{
int res = -1;
syscall_printf ("handle %p", get_handle());
if (CloseHandle (get_handle()))
res = 0;
else
{
paranoid_printf ("CloseHandle (%d <%s>) failed", get_handle(),
get_name ());
__seterrno ();
}
return res;
}
int
fhandler_base::ioctl (unsigned int cmd, void *buf)
{
if (cmd == FIONBIO)
syscall_printf ("ioctl (FIONBIO, %p)", buf);
else
syscall_printf ("ioctl (%x, %p)", cmd, buf);
set_errno (EINVAL);
return -1;
}
int
fhandler_base::lock (int, struct flock *)
{
set_errno (ENOSYS);
return -1;
}
int
fhandler_base::fstat (struct stat *buf)
{
return stat_dev (get_device (), get_unit (), get_namehash (), buf);
return 0;
}
extern "C" char * __stdcall
rootdir(char *full_path)
{
/* Possible choices:
* d:... -> d:/
* \\server\share... -> \\server\share\
* else current drive.
*/
char *root=full_path;
if (full_path[1] == ':')
strcpy (full_path + 2, "\\");
else if (full_path[0] == '\\' && full_path[1] == '\\')
{
char *cp = full_path + 2;
while (*cp && *cp != '\\')
cp++;
if (!*cp)
{
set_errno (ENOTDIR);
return NULL;
}
cp++;
while (*cp && *cp != '\\')
cp++;
strcpy (cp, "\\");
}
else
root = NULL;
return root;
}
int
fhandler_disk_file::fstat (struct stat *buf)
{
int res = 0; // avoid a compiler warning
BY_HANDLE_FILE_INFORMATION local;
int old_errno = get_errno ();
memset (buf, 0, sizeof (*buf));
if (is_device ())
return stat_dev (get_device (), get_unit (), get_namehash (), buf);
/* NT 3.51 seems to have a bug when attempting to get vol serial
numbers. This loop gets around this. */
for (int i = 0; i < 2; i++)
{
if (!(res = GetFileInformationByHandle (get_handle (), &local)))
break;
if (local.dwVolumeSerialNumber && (long) local.dwVolumeSerialNumber != -1)
break;
}
debug_printf ("%d = GetFileInformationByHandle (%s, %d)",
res, get_win32_name (), get_handle ());
if (res == 0)
{
/* GetFileInformationByHandle will fail if it's given stdin/out/err
or a pipe*/
DWORD lsize, hsize;
if (GetFileType (get_handle ()) != FILE_TYPE_DISK)
buf->st_mode = S_IFCHR;
lsize = GetFileSize (get_handle (), &hsize);
if (lsize == 0xffffffff && GetLastError () != NO_ERROR)
buf->st_mode = S_IFCHR;
else
buf->st_size = lsize;
/* We expect these to fail! */
buf->st_mode |= STD_RBITS | STD_WBITS;
buf->st_blksize = S_BLKSIZE;
buf->st_ino = get_namehash ();
syscall_printf ("0 = fstat (, %p)", buf);
return 0;
}
if (!get_win32_name ())
{
set_errno (ENOENT);
return -1;
}
set_errno (old_errno);
buf->st_atime = to_time_t (&local.ftLastAccessTime);
buf->st_mtime = to_time_t (&local.ftLastWriteTime);
buf->st_ctime = to_time_t (&local.ftCreationTime);
buf->st_nlink = local.nNumberOfLinks;
buf->st_dev = local.dwVolumeSerialNumber;
buf->st_size = local.nFileSizeLow;
/* Allocate some place to determine the root directory. Need to allocate
enough so that rootdir can add a trailing slash if path starts with \\. */
char root[strlen (get_win32_name ()) + 3];
strcpy (root, get_win32_name ());
/* Assume that if a drive has ACL support it MAY have valid "inodes".
It definitely does not have valid inodes if it does not have ACL
support. */
switch (has_acls () ? GetDriveType (rootdir (root)) : DRIVE_UNKNOWN)
{
case DRIVE_FIXED:
case DRIVE_REMOVABLE:
case DRIVE_CDROM:
case DRIVE_RAMDISK:
/* Although the documentation indicates otherwise, it seems like
"inodes" on these devices are persistent, at least across reboots. */
buf->st_ino = local.nFileIndexHigh | local.nFileIndexLow;
break;
default:
/* Either the nFileIndex* fields are unreliable or unavailable. Use the
next best alternative. */
buf->st_ino = get_namehash ();
break;
}
buf->st_blksize = S_BLKSIZE;
buf->st_blocks = (buf->st_size + S_BLKSIZE-1) / S_BLKSIZE;
/* Using a side effect: get_file_attibutes checks for
directory. This is used, to set S_ISVTX, if needed. */
if (local.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
buf->st_mode |= S_IFDIR;
if (! get_file_attribute (has_acls (),
get_win32_name (),
&buf->st_mode,
&buf->st_uid,
&buf->st_gid))
{
/* If read-only attribute is set, modify ntsec return value */
if (local.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
buf->st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
buf->st_mode &= ~S_IFMT;
if (get_symlink_p ())
buf->st_mode |= S_IFLNK;
else if (get_socket_p ())
buf->st_mode |= S_IFSOCK;
else if (local.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
buf->st_mode |= S_IFDIR;
else
buf->st_mode |= S_IFREG;
}
else
{
buf->st_mode = 0;
buf->st_mode |= STD_RBITS;
if (! (local.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
buf->st_mode |= STD_WBITS;
/* | S_IWGRP | S_IWOTH; we don't give write to group etc */
if (get_symlink_p ())
buf->st_mode |= S_IFLNK;
else if (get_socket_p ())
buf->st_mode |= S_IFSOCK;
else
switch (GetFileType (get_handle ()))
{
case FILE_TYPE_CHAR:
case FILE_TYPE_UNKNOWN:
buf->st_mode |= S_IFCHR;
break;
case FILE_TYPE_DISK:
if (local.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
buf->st_mode |= S_IFDIR | STD_XBITS;
else
{
buf->st_mode |= S_IFREG;
if (get_execable_p ())
buf->st_mode |= STD_XBITS;
}
break;
case FILE_TYPE_PIPE:
buf->st_mode |= S_IFSOCK;
break;
}
}
syscall_printf ("0 = fstat (, %p) st_atime=%x st_size=%d, st_mode=%p, st_ino=%d, sizeof=%d",
buf, buf->st_atime, buf->st_size, buf->st_mode,
(int) buf->st_ino, sizeof (*buf));
return 0;
}
void
fhandler_base::init (HANDLE f, DWORD a, mode_t bin)
{
set_io_handle (f);
set_r_binary (bin);
set_w_binary (bin);
access_ = a;
a &= GENERIC_READ | GENERIC_WRITE;
if (a == GENERIC_READ)
set_flags (O_RDONLY);
if (a == GENERIC_WRITE)
set_flags (O_WRONLY);
if (a == (GENERIC_READ | GENERIC_WRITE))
set_flags (O_RDWR);
debug_printf ("created new fhandler_base for handle %p", f);
}
void
fhandler_base::dump (void)
{
paranoid_printf ("here");
}
void
fhandler_base::set_io_handle (HANDLE x)
{
debug_printf ("set handle to %p", x);
io_handle = x;
}
int
fhandler_base::dup (fhandler_base *child)
{
debug_printf ("in fhandler_base dup");
HANDLE nh;
if (!DuplicateHandle (hMainProc, get_handle(), hMainProc, &nh, 0, TRUE,
DUPLICATE_SAME_ACCESS))
{
system_printf ("dup(%s) failed, handle %x, %E",
get_name (), get_handle());
__seterrno ();
return -1;
}
child->set_io_handle (nh);
return 0;
}
/* Base terminal handlers. These just return errors. */
int
fhandler_base::tcflush (int)
{
set_errno (ENOTTY);
return -1;
}
int
fhandler_base::tcsendbreak (int)
{
set_errno (ENOTTY);
return -1;
}
int
fhandler_base::tcdrain (void)
{
set_errno (ENOTTY);
return -1;
}
int
fhandler_base::tcflow (int)
{
set_errno (ENOTTY);
return -1;
}
int
fhandler_base::tcsetattr (int, const struct termios *)
{
set_errno (ENOTTY);
return -1;
}
int
fhandler_base::tcgetattr (struct termios *)
{
set_errno (ENOTTY);
return -1;
}
int
fhandler_base::tcsetpgrp (const pid_t)
{
set_errno (ENOTTY);
return -1;
}
int
fhandler_base::tcgetpgrp (void)
{
set_errno (ENOTTY);
return -1;
}
/* Normal I/O constructor */
fhandler_base::fhandler_base (DWORD devtype, const char *name, int unit):
access_ (0),
io_handle (NULL),
rpos_ (0),
rsize_ (0),
namehash_ (0),
openflags_ (0),
rabuf (NULL),
ralen (0),
raixget (0),
raixput (0),
rabuflen (0)
{
status = devtype;
int bin = __fmode & O_TEXT ? 0 : 1;
if (status != FH_DISK && status != FH_CONSOLE)
{
if (!get_r_binset ())
set_r_binary (bin);
if (!get_w_binset ())
set_w_binary (bin);
}
unix_path_name_ = win32_path_name_ = NULL;
set_name (name, NULL, unit);
}
/* Normal I/O destructor */
fhandler_base::~fhandler_base (void)
{
if (!no_free_names ())
{
if (unix_path_name_ != NULL && unix_path_name_ != fhandler_disk_dummy_name)
free (unix_path_name_);
if (win32_path_name_ != NULL && win32_path_name_ != fhandler_disk_dummy_name)
free (win32_path_name_);
}
unix_path_name_ = win32_path_name_ = NULL;
}
/**********************************************************************/
/* fhandler_disk_file */
fhandler_disk_file::fhandler_disk_file (const char *name) :
fhandler_base (FH_DISK, name)
{
set_cb (sizeof *this);
set_no_free_names ();
unix_path_name_ = win32_path_name_ = fhandler_disk_dummy_name;
}
int
fhandler_disk_file::open (const char *path, int flags, mode_t mode)
{
syscall_printf ("(%s, %p)", path, flags);
/* O_NOSYMLINK is an internal flag for implementing lstat, nothing more. */
path_conv real_path (path, (flags & O_NOSYMLINK) ? SYMLINK_NOFOLLOW:SYMLINK_FOLLOW);
if (real_path.error &&
(flags & O_NOSYMLINK || real_path.error != ENOENT || !(flags & O_CREAT)))
{
set_errno (real_path.error);
syscall_printf ("0 = fhandler_disk_file::open (%s, %p)", path, flags);
return 0;
}
set_name (path, real_path.get_win32 ());
set_no_free_names (0);
return open (real_path, flags, mode);
}
int
fhandler_disk_file::open (path_conv& real_path, int flags, mode_t mode)
{
if (get_win32_name () == fhandler_disk_dummy_name)
{
win32_path_name_ = real_path.get_win32 ();
set_no_free_names ();
}
/* If necessary, do various other things to see if path is a program. */
if (!real_path.isexec ())
real_path.set_exec (check_execable_p (get_win32_name ()));
if (real_path.isbinary ())
{
set_r_binary (1);
set_w_binary (1);
}
set_has_acls (real_path.has_acls ());
if (real_path.file_attributes () != (DWORD)-1
&& (real_path.file_attributes () & FILE_ATTRIBUTE_DIRECTORY))
flags |= O_DIROPEN;
int res = this->fhandler_base::open (flags, mode);
if (!res)
goto out;
extern BOOL allow_ntea;
extern BOOL allow_ntsec;
if (!real_path.isexec () && !allow_ntea
&& (!allow_ntsec || !real_path.has_acls ())
&& GetFileType (get_handle ()) == FILE_TYPE_DISK)
{
DWORD done;
char magic[3];
/* FIXME should we use /etc/magic ? */
magic[0] = magic[1] = magic[2] = '\0';
ReadFile (get_handle (), magic, 3, &done, 0);
if ((magic[0] == ':' && magic[1] == '\n') ||
(magic[0] == '#' && magic[1] == '!'))
real_path.set_exec ();
if (!(flags & O_APPEND))
SetFilePointer (get_handle(), 0, 0, FILE_BEGIN);
}
if (flags & O_APPEND)
SetFilePointer (get_handle(), 0, 0, FILE_END);
set_symlink_p (real_path.issymlink ());
set_execable_p (real_path.isexec ());
set_socket_p (real_path.issocket ());
out:
syscall_printf ("%d = fhandler_disk_file::open (%s, %p)", res,
get_win32_name (), flags);
return res;
}
int
fhandler_disk_file::close ()
{
int res;
if ((res = this->fhandler_base::close ()) == 0)
cygwin_shared->delqueue.process_queue ();
return res;
}
/*
* FIXME !!!
* The correct way to do this to get POSIX locking
* semantics is to keep a linked list of posix lock
* requests and map them into Win32 locks. The problem
* is that Win32 does not deal correctly with overlapping
* lock requests. Also another pain is that Win95 doesn't do
* non-blocking or non exclusive locks at all. For '95 just
* convert all lock requests into blocking,exclusive locks.
* This shouldn't break many apps but denying all locking
* would.
* For now just convert to Win32 locks and hope for the best.
*/
int
fhandler_disk_file::lock (int cmd, struct flock *fl)
{
int win32_start;
int win32_len;
DWORD win32_upper;
DWORD startpos;
/*
* We don't do getlck calls yet.
*/
if (cmd == F_GETLK)
{
set_errno (ENOSYS);
return -1;
}
/*
* Calculate where in the file to start from,
* then adjust this by fl->l_start.
*/
switch (fl->l_whence)
{
case SEEK_SET:
startpos = 0;
break;
case SEEK_CUR:
if ((off_t) (startpos = lseek (0, SEEK_CUR)) == (off_t)-1)
return -1;
break;
case SEEK_END:
{
BY_HANDLE_FILE_INFORMATION finfo;
if (GetFileInformationByHandle (get_handle(), &finfo) == 0)
{
__seterrno ();
return -1;
}
startpos = finfo.nFileSizeLow; /* Nowhere to keep high word */
break;
}
default:
set_errno (EINVAL);
return -1;
}
/*
* Now the fun starts. Adjust the start and length
* fields until they make sense.
*/
win32_start = startpos + fl->l_start;
if (fl->l_len < 0)
{
win32_start -= fl->l_len;
win32_len = -fl->l_len;
}
else
win32_len = fl->l_len;
if (win32_start < 0)
{
/* watch the signs! */
win32_len -= -win32_start;
if (win32_len <= 0)
{
/* Failure ! */
set_errno (EINVAL);
return -1;
}
win32_start = 0;
}
/*
* Special case if len == 0 for POSIX means lock
* to the end of the entire file (and all future extensions).
*/
if (win32_len == 0)
{
win32_len = 0xffffffff;
win32_upper = host_dependent.win32_upper;
}
else
win32_upper = 0;
BOOL res;
if (os_being_run == winNT)
{
DWORD lock_flags = (cmd == F_SETLK) ? LOCKFILE_FAIL_IMMEDIATELY : 0;
lock_flags |= (fl->l_type == F_WRLCK) ? LOCKFILE_EXCLUSIVE_LOCK : 0;
OVERLAPPED ov;
ov.Internal = 0;
ov.InternalHigh = 0;
ov.Offset = (DWORD)win32_start;
ov.OffsetHigh = 0;
ov.hEvent = (HANDLE) 0;
if (fl->l_type == F_UNLCK)
{
res = UnlockFileEx (get_handle (), 0, (DWORD)win32_len, win32_upper, &ov);
}
else
{
res = LockFileEx (get_handle (), lock_flags, 0, (DWORD)win32_len,
win32_upper, &ov);
/* Deal with the fail immediately case. */
/*
* FIXME !! I think this is the right error to check for
* but I must admit I haven't checked....
*/
if ((res == 0) && (lock_flags & LOCKFILE_FAIL_IMMEDIATELY) &&
(GetLastError () == ERROR_LOCK_FAILED))
{
set_errno (EAGAIN);
return -1;
}
}
}
else
{
/* Windows 95 -- use primitive lock call */
if (fl->l_type == F_UNLCK)
res = UnlockFile (get_handle (), (DWORD)win32_start, 0, (DWORD)win32_len,
win32_upper);
else
res = LockFile (get_handle (), (DWORD)win32_start, 0, (DWORD)win32_len, win32_upper);
}
if (res == 0)
{
__seterrno ();
return -1;
}
return 0;
}
/* Perform various heuristics on PATH to see if it's a program. */
int
fhandler_disk_file::check_execable_p (const char *path)
{
int len = strlen (path);
const char *ch = path + (len > 4 ? len - 4 : len);
if (strcasematch (".exe", ch)
|| strcasematch (".bat", ch)
|| strcasematch (".com", ch))
return 1;
return 0;
}
/**********************************************************************/
/* /dev/null */
fhandler_dev_null::fhandler_dev_null (const char *name) :
fhandler_base (FH_NULL, name)
{
set_cb (sizeof *this);
}
void
fhandler_dev_null::dump (void)
{
paranoid_printf ("here");
}
/**********************************************************************/
/* fhandler_pipe */
fhandler_pipe::fhandler_pipe (const char *name, DWORD devtype) :
fhandler_base (devtype, name)
{
set_cb (sizeof *this);
}
off_t
fhandler_pipe::lseek (off_t offset, int whence)
{
debug_printf ("(%d, %d)", offset, whence);
set_errno (ESPIPE);
return -1;
}
#ifdef DEBUGGING
#define nameparm name
#else
#define nameparm
#endif
void
fhandler_base::set_inheritance (HANDLE &h, int not_inheriting, const char *nameparm)
#undef nameparm
{
HANDLE newh;
if (!DuplicateHandle (hMainProc, h, hMainProc, &newh, 0, !not_inheriting,
DUPLICATE_SAME_ACCESS))
debug_printf ("DuplicateHandle %E");
#ifndef DEBUGGING
else
{
hclose (h);
h = newh;
}
#else
else if (!name)
{
hclose (h);
h = newh;
}
else
/* FIXME: This won't work with sockets */
{
ForceCloseHandle2 (h, name);
h = newh;
ProtectHandle2 (h, name);
}
#endif
}
void
fhandler_base::fork_fixup (HANDLE parent, HANDLE &h, const char *name)
{
if (!DuplicateHandle (parent, h, hMainProc, &h, 0, !get_close_on_exec (),
DUPLICATE_SAME_ACCESS))
system_printf ("%s - %E, handle %s<%p>", get_name (), name, h);
}
void
fhandler_base::set_close_on_exec (int val)
{
set_inheritance (io_handle, val);
set_close_on_exec_flag (val);
debug_printf ("set close_on_exec for %s to %d", get_name (), val);
}
void
fhandler_base::fixup_after_fork (HANDLE parent)
{
debug_printf ("inheriting '%s' from parent", get_name ());
fork_fixup (parent, io_handle, "io_handle");
}
|