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
|
/* fhandler_disk_file.cc
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc.
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 "winsup.h"
#include <unistd.h>
#include <stdlib.h>
#include <sys/cygwin.h>
#include <signal.h>
#include "cygerrno.h"
#include "perprocess.h"
#include "security.h"
#include "cygwin/version.h"
#include "fhandler.h"
#include "path.h"
#include "dtable.h"
#include "cygheap.h"
#include "shared_info.h"
#include "pinfo.h"
#include <assert.h>
#include <ctype.h>
#define _COMPILING_NEWLIB
#include <dirent.h>
static int __stdcall
num_entries (const char *win32_name)
{
WIN32_FIND_DATA buf;
HANDLE handle;
char buf1[MAX_PATH];
int count = 0;
strcpy (buf1, win32_name);
int len = strlen (buf1);
if (len == 0 || isdirsep (buf1[len - 1]))
strcat (buf1, "*");
else
strcat (buf1, "/*"); /* */
handle = FindFirstFileA (buf1, &buf);
if (handle == INVALID_HANDLE_VALUE)
return 2; /* 2 is the minimum number of links to a dir, so... */
count ++;
while (FindNextFileA (handle, &buf))
{
if ((buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
count ++;
}
FindClose (handle);
return count;
}
int __stdcall
fhandler_disk_file::fstat_by_handle (struct __stat64 *buf, path_conv *pc)
{
int res = 0;
BY_HANDLE_FILE_INFORMATION local;
/* 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*/
{
memset (&local, 0, sizeof (local));
local.nFileSizeLow = GetFileSize (get_handle (), &local.nFileSizeHigh);
}
return fstat_helper (buf, pc,
local.ftCreationTime,
local.ftLastAccessTime,
local.ftLastWriteTime,
local.nFileSizeHigh,
local.nFileSizeLow,
local.nFileIndexHigh,
local.nFileIndexLow,
local.nNumberOfLinks);
}
int __stdcall
fhandler_disk_file::fstat_by_name (struct __stat64 *buf, path_conv *pc)
{
int res;
HANDLE handle;
WIN32_FIND_DATA local;
if (!pc->exists ())
{
debug_printf ("already determined that pc does not exist");
set_errno (ENOENT);
res = -1;
}
else if ((handle = FindFirstFile (*pc, &local)) != INVALID_HANDLE_VALUE)
{
FindClose (handle);
res = fstat_helper (buf, pc,
local.ftCreationTime,
local.ftLastAccessTime,
local.ftLastWriteTime,
local.nFileSizeHigh,
local.nFileSizeLow);
}
else if (pc->isdir ())
{
FILETIME ft = {};
res = fstat_helper (buf, pc, ft, ft, ft, 0, 0);
}
else
{
debug_printf ("FindFirstFile failed for '%s', %E", (char *) *pc);
__seterrno ();
res = -1;
}
return res;
}
int __stdcall
fhandler_disk_file::fstat (struct __stat64 *buf, path_conv *pc)
{
int res = -1;
int oret;
int open_flags = O_RDONLY | O_BINARY | O_DIROPEN;
bool query_open_already;
if (get_io_handle ())
{
if (get_nohandle ())
return fstat_by_name (buf, pc);
else
return fstat_by_handle (buf, pc);
}
/* If we don't care if the file is executable or we already know if it is,
then just do a "query open" as it is apparently much faster. */
if (pc->exec_state () != dont_know_if_executable)
set_query_open (query_open_already = true);
else
query_open_already = false;
if (query_open_already && strncasematch (pc->volname (), "FAT", 3)
&& !strpbrk (get_win32_name (), "?*|<>"))
oret = 0;
else if (!(oret = open (pc, open_flags, 0))
&& !query_open_already
&& get_errno () == EACCES)
{
/* If we couldn't open the file, try a "query open" with no permissions.
This will allow us to determine *some* things about the file, at least. */
pc->set_exec (0);
set_query_open (true);
oret = open (pc, open_flags, 0);
}
if (!oret || get_nohandle ())
res = fstat_by_name (buf, pc);
else
{
res = fstat_by_handle (buf, pc);
close ();
}
return res;
}
int __stdcall
fhandler_disk_file::fstat_helper (struct __stat64 *buf, path_conv *pc,
FILETIME ftCreationTime,
FILETIME ftLastAccessTime,
FILETIME ftLastWriteTime,
DWORD nFileSizeHigh,
DWORD nFileSizeLow,
DWORD nFileIndexHigh,
DWORD nFileIndexLow,
DWORD nNumberOfLinks)
{
/* This is for FAT filesystems, which don't support atime/ctime */
if (ftLastAccessTime.dwLowDateTime == 0
&& ftLastAccessTime.dwHighDateTime == 0)
ftLastAccessTime = ftLastWriteTime;
if (ftCreationTime.dwLowDateTime == 0
&& ftCreationTime.dwHighDateTime == 0)
ftCreationTime = ftLastWriteTime;
to_timestruc_t (&ftLastAccessTime, &buf->st_atim);
to_timestruc_t (&ftLastWriteTime, &buf->st_mtim);
to_timestruc_t (&ftCreationTime, &buf->st_ctim);
buf->st_dev = pc->volser ();
buf->st_size = ((_off64_t)nFileSizeHigh << 32) + nFileSizeLow;
/* The number of links to a directory includes the
number of subdirectories in the directory, since all
those subdirectories point to it.
This is too slow on remote drives, so we do without it.
Setting the count to 2 confuses `find (1)' command. So
let's try it with `1' as link count. */
if (pc->isdir () && !pc->isremote () && nNumberOfLinks == 1)
buf->st_nlink = num_entries (pc->get_win32 ());
else
buf->st_nlink = nNumberOfLinks;
/* 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 (pc->has_acls () && (nFileIndexHigh || nFileIndexLow)
? pc->drive_type () : 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 = (((__ino64_t) nFileIndexHigh) << 32)
| (__ino64_t) 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;
/* GetCompressedFileSize() gets autoloaded. It returns INVALID_FILE_SIZE
if it doesn't exist. Since that's also a valid return value on 64bit
capable file systems, we must additionally check for the win32 error. */
nFileSizeLow = GetCompressedFileSizeA (pc->get_win32 (), &nFileSizeHigh);
if (nFileSizeLow != INVALID_FILE_SIZE || GetLastError () == NO_ERROR)
/* On systems supporting compressed (and sparsed) files,
GetCompressedFileSize() returns the actual amount of
bytes allocated on disk. */
buf->st_blocks = (((_off64_t)nFileSizeHigh << 32)
+ nFileSizeLow + S_BLKSIZE - 1) / S_BLKSIZE;
else
/* Just compute no. of blocks from file size. */
buf->st_blocks = (buf->st_size + S_BLKSIZE - 1) / S_BLKSIZE;
buf->st_mode = 0;
/* Using a side effect: get_file_attibutes checks for
directory. This is used, to set S_ISVTX, if needed. */
if (pc->isdir ())
buf->st_mode = S_IFDIR;
else if (pc->issymlink ())
{
/* symlinks are everything for everyone! */
buf->st_mode = S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO;
get_file_attribute (pc->has_acls (), get_win32_name (), NULL,
&buf->st_uid, &buf->st_gid);
goto done;
}
else if (pc->issocket ())
buf->st_mode = S_IFSOCK;
if (get_file_attribute (pc->has_acls (), get_win32_name (), &buf->st_mode,
&buf->st_uid, &buf->st_gid) == 0)
{
/* If read-only attribute is set, modify ntsec return value */
if (pc->has_attribute (FILE_ATTRIBUTE_READONLY) && !get_symlink_p ())
buf->st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
if (!(buf->st_mode & S_IFMT))
buf->st_mode |= S_IFREG;
}
else
{
buf->st_mode |= STD_RBITS;
if (!pc->has_attribute (FILE_ATTRIBUTE_READONLY))
buf->st_mode |= STD_WBITS;
/* | S_IWGRP | S_IWOTH; we don't give write to group etc */
if (S_ISDIR (buf->st_mode))
buf->st_mode |= S_IFDIR | STD_XBITS;
else if (buf->st_mode & S_IFMT)
/* nothing */;
else
{
buf->st_mode |= S_IFREG;
if (pc->exec_state () == dont_know_if_executable)
{
DWORD cur, done;
char magic[3];
/* First retrieve current position, set to beginning
of file if not already there. */
cur = SetFilePointer (get_handle (), 0, NULL, FILE_CURRENT);
if (cur != INVALID_SET_FILE_POINTER
&& (!cur || SetFilePointer (get_handle (), 0, NULL, FILE_BEGIN)
!= INVALID_SET_FILE_POINTER))
{
/* FIXME should we use /etc/magic ? */
magic[0] = magic[1] = magic[2] = '\0';
if (ReadFile (get_handle (), magic, 3, &done, NULL)
&& has_exec_chars (magic, done))
{
set_execable_p ();
pc->set_exec ();
buf->st_mode |= STD_XBITS;
}
(void) SetFilePointer (get_handle (), cur, NULL, FILE_BEGIN);
}
}
}
if (pc->exec_state () == is_executable)
buf->st_mode |= STD_XBITS;
/* This fakes the permissions of all files to match the current umask. */
buf->st_mode &= ~(cygheap->umask);
}
done:
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;
}
fhandler_disk_file::fhandler_disk_file (DWORD devtype) :
fhandler_base (devtype)
{
}
fhandler_disk_file::fhandler_disk_file () :
fhandler_base (FH_DISK)
{
}
int
fhandler_disk_file::open (path_conv *real_path, int flags, mode_t mode)
{
if (real_path->case_clash && flags & O_CREAT)
{
debug_printf ("case clash detected");
set_errno (ECASECLASH);
return 0;
}
set_has_acls (real_path->has_acls ());
set_isremote (real_path->isremote ());
int res = fhandler_base::open (real_path, flags | O_DIROPEN, mode);
if (!res)
goto out;
/* This is for file systems known for having a buggy CreateFile call
which might return a valid HANDLE without having actually opened
the file.
The only known file system to date is the SUN NFS Solstice Client 3.1
which returns a valid handle when trying to open a file in a nonexistent
directory. */
if (real_path->has_buggy_open () && !real_path->exists ())
{
debug_printf ("Buggy open detected.");
close ();
set_errno (ENOENT);
return 0;
}
/* Attributes may be set only if a file is _really_ created.
This code is now only used for ntea here since the files
security attributes are set in CreateFile () now. */
if (flags & O_CREAT
&& GetLastError () != ERROR_ALREADY_EXISTS
&& !allow_ntsec && allow_ntea)
set_file_attribute (has_acls (), get_win32_name (), mode);
set_fs_flags (real_path->fs_flags ());
set_symlink_p (real_path->issymlink ());
set_execable_p (real_path->exec_state ());
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 = fhandler_base::close ();
if (!res)
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)
{
_off64_t win32_start;
int win32_len;
DWORD win32_upper;
_off64_t 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 ((startpos = lseek (0, SEEK_CUR)) == ILLEGAL_SEEK)
return -1;
break;
case SEEK_END:
{
BY_HANDLE_FILE_INFORMATION finfo;
if (GetFileInformationByHandle (get_handle (), &finfo) == 0)
{
__seterrno ();
return -1;
}
startpos = ((_off64_t)finfo.nFileSizeHigh << 32)
+ finfo.nFileSizeLow;
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 = wincap.lock_file_highword ();
}
else
win32_upper = 0;
BOOL res;
if (wincap.has_lock_file_ex ())
{
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;
}
DIR *
fhandler_disk_file::opendir (path_conv& real_name)
{
DIR *dir;
DIR *res = NULL;
size_t len;
if (!real_name.isdir ())
set_errno (ENOTDIR);
else if ((len = strlen (real_name))> MAX_PATH - 3)
set_errno (ENAMETOOLONG);
else if ((dir = (DIR *) malloc (sizeof (DIR))) == NULL)
set_errno (ENOMEM);
else if ((dir->__d_dirname = (char *) malloc (len + 3)) == NULL)
{
free (dir);
set_errno (ENOMEM);
}
else if ((dir->__d_dirent =
(struct dirent *) malloc (sizeof (struct dirent))) == NULL)
{
free (dir->__d_dirname);
free (dir);
set_errno (ENOMEM);
}
else
{
strcpy (dir->__d_dirname, real_name.get_win32 ());
dir->__d_dirent->d_version = __DIRENT_VERSION;
cygheap_fdnew fd;
if (fd >= 0)
{
fd = this;
fd->set_nohandle (true);
dir->__d_dirent->d_fd = fd;
dir->__d_u.__d_data.__fh = this;
/* FindFirstFile doesn't seem to like duplicate /'s. */
len = strlen (dir->__d_dirname);
if (len == 0 || isdirsep (dir->__d_dirname[len - 1]))
strcat (dir->__d_dirname, "*");
else
strcat (dir->__d_dirname, "\\*"); /**/
dir->__d_cookie = __DIRENT_COOKIE;
dir->__d_u.__d_data.__handle = INVALID_HANDLE_VALUE;
dir->__d_position = 0;
dir->__d_dirhash = get_namehash ();
res = dir;
}
if (real_name.isencoded ())
set_encoded ();
}
syscall_printf ("%p = opendir (%s)", res, get_name ());
return res;
}
struct dirent *
fhandler_disk_file::readdir (DIR *dir)
{
WIN32_FIND_DATA buf;
HANDLE handle;
struct dirent *res = NULL;
if (dir->__d_u.__d_data.__handle == INVALID_HANDLE_VALUE
&& dir->__d_position == 0)
{
handle = FindFirstFileA (dir->__d_dirname, &buf);
DWORD lasterr = GetLastError ();
dir->__d_u.__d_data.__handle = handle;
if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES))
{
seterrno_from_win_error (__FILE__, __LINE__, lasterr);
return res;
}
}
else if (dir->__d_u.__d_data.__handle == INVALID_HANDLE_VALUE)
return res;
else if (!FindNextFileA (dir->__d_u.__d_data.__handle, &buf))
{
DWORD lasterr = GetLastError ();
(void) FindClose (dir->__d_u.__d_data.__handle);
dir->__d_u.__d_data.__handle = INVALID_HANDLE_VALUE;
/* POSIX says you shouldn't set errno when readdir can't
find any more files; so, if another error we leave it set. */
if (lasterr != ERROR_NO_MORE_FILES)
seterrno_from_win_error (__FILE__, __LINE__, lasterr);
syscall_printf ("%p = readdir (%p)", res, dir);
return res;
}
/* We get here if `buf' contains valid data. */
if (get_encoded ())
(void) fnunmunge (dir->__d_dirent->d_name, buf.cFileName);
else
strcpy (dir->__d_dirent->d_name, buf.cFileName);
/* Check for Windows shortcut. If it's a Cygwin or U/WIN
symlink, drop the .lnk suffix. */
if (buf.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
{
char *c = dir->__d_dirent->d_name;
int len = strlen (c);
if (strcasematch (c + len - 4, ".lnk"))
{
char fbuf[MAX_PATH + 1];
strcpy (fbuf, dir->__d_dirname);
strcpy (fbuf + strlen (fbuf) - 1, dir->__d_dirent->d_name);
path_conv fpath (fbuf, PC_SYM_NOFOLLOW);
if (fpath.issymlink ())
c[len - 4] = '\0';
}
}
dir->__d_position++;
res = dir->__d_dirent;
syscall_printf ("%p = readdir (%p) (%s)",
&dir->__d_dirent, dir, buf.cFileName);
return res;
}
_off64_t
fhandler_disk_file::telldir (DIR *dir)
{
return dir->__d_position;
}
void
fhandler_disk_file::seekdir (DIR *dir, _off64_t loc)
{
rewinddir (dir);
while (loc > dir->__d_position)
if (!readdir (dir))
break;
}
void
fhandler_disk_file::rewinddir (DIR *dir)
{
if (dir->__d_u.__d_data.__handle != INVALID_HANDLE_VALUE)
{
(void) FindClose (dir->__d_u.__d_data.__handle);
dir->__d_u.__d_data.__handle = INVALID_HANDLE_VALUE;
}
dir->__d_position = 0;
}
int
fhandler_disk_file::closedir (DIR *dir)
{
int res = 0;
if (dir->__d_u.__d_data.__handle != INVALID_HANDLE_VALUE &&
FindClose (dir->__d_u.__d_data.__handle) == 0)
{
__seterrno ();
res = -1;
}
syscall_printf ("%d = closedir (%p)", res, dir);
return 0;
}
fhandler_cygdrive::fhandler_cygdrive (int unit) :
fhandler_disk_file (FH_CYGDRIVE), unit (unit), ndrives (0), pdrive (NULL)
{
}
#define DRVSZ sizeof ("x:\\")
void
fhandler_cygdrive::set_drives ()
{
const int len = 1 + 26 * DRVSZ;
char *p = (char *) crealloc ((void *) win32_path_name,
sizeof (".") + sizeof ("..") + len);
win32_path_name = pdrive = p;
strcpy (p, ".");
strcpy (p + sizeof ("."), "..");
p += sizeof (".") + sizeof ("..");
ndrives = GetLogicalDriveStrings (len, p) / DRVSZ;
}
int
fhandler_cygdrive::fstat (struct __stat64 *buf, path_conv *pc)
{
if (!iscygdrive_root ())
return fhandler_disk_file::fstat (buf, pc);
buf->st_mode = S_IFDIR | 0555;
if (!ndrives)
set_drives ();
buf->st_nlink = ndrives;
return 0;
}
DIR *
fhandler_cygdrive::opendir (path_conv& real_name)
{
DIR *dir;
dir = fhandler_disk_file::opendir (real_name);
if (dir && iscygdrive_root () && !ndrives)
set_drives ();
return dir;
}
struct dirent *
fhandler_cygdrive::readdir (DIR *dir)
{
if (!iscygdrive_root ())
return fhandler_disk_file::readdir (dir);
if (!pdrive || !*pdrive)
return NULL;
else if (dir->__d_position > 1
&& GetFileAttributes (pdrive) == INVALID_FILE_ATTRIBUTES)
{
pdrive = strchr (pdrive, '\0') + 1;
return readdir (dir);
}
else if (*pdrive == '.')
strcpy (dir->__d_dirent->d_name, pdrive);
else
{
*dir->__d_dirent->d_name = cyg_tolower (*pdrive);
dir->__d_dirent->d_name[1] = '\0';
}
dir->__d_position++;
pdrive = strchr (pdrive, '\0') + 1;
syscall_printf ("%p = readdir (%p) (%s)", &dir->__d_dirent, dir,
dir->__d_dirent->d_name);
return dir->__d_dirent;
}
_off64_t
fhandler_cygdrive::telldir (DIR *dir)
{
return fhandler_disk_file::telldir (dir);
}
void
fhandler_cygdrive::seekdir (DIR *dir, _off64_t loc)
{
if (!iscygdrive_root ())
return fhandler_disk_file::seekdir (dir, loc);
for (pdrive = win32_path_name, dir->__d_position = -1; *pdrive;
pdrive = strchr (pdrive, '\0') + 1)
if (++dir->__d_position >= loc)
break;
return;
}
void
fhandler_cygdrive::rewinddir (DIR *dir)
{
if (!iscygdrive_root ())
return fhandler_disk_file::rewinddir (dir);
pdrive = win32_path_name;
dir->__d_position = 0;
return;
}
int
fhandler_cygdrive::closedir (DIR *dir)
{
if (!iscygdrive_root ())
return fhandler_disk_file::closedir (dir);
pdrive = win32_path_name;
return -1;
}
|