I think this error is located in the cygwin/ntea.cc read_ea function.
NtQueryEaFile fails due to unsupported extended attributes on fat32 and
iso9660 and ret is set to -1. After setting ret to -1 the function
checks fea->EaValueLength which is in my case 8313 (see log) due to an
uninitialized stack and read_ea return 8313. Now the calling function
(fhandler_base::fstat_helper) is using the uninitialized data for the
timestamp and file size and returns incorrect values.
This error doesn't happen on the new 1.7 release, but I need a solution
for the stable version.
if (!NT_SUCCESS (status))
{
ret = -1;
debug_printf ("%x = NtQueryEaFile (%s, %s), Win32 error %d",
status, file, attrname, RtlNtStatusToDosError
(status));
}
if (!fea->EaValueLength)
ret = 0;
else
{
memcpy (attrbuf, fea->EaName + fea->EaNameLength + 1,
fea->EaValueLength);
ret = fea->EaValueLength;
}
David Engraf schrieb:
Hi,
I have encountered a problem while listening the content of a CD. When I
call "ls -l /cygdrive/d" the file size and creation/modification time is
corrupted. This also happens on usb sticks formatted with fat32. Only
ntfs formatted filesystems have the correct listening.
Attached is a strace log calling the function fstat on a file located on
the specified filesystem.
//ISO9660
get_file_attribute: file: d:\README.txt
read_ea: 1. chance, C0000010 = NtQueryEaFile (d:\README.txt, .UNIXATTR),
Win32 error 1
read_ea: C0000010 = NtQueryEaFile (d:\README.txt, .UNIXATTR), Win32 error 1
read_ea: 8313 = read_ea (0, d:\README.txt, .UNIXATTR, 22A9F0, 4)
fhandler_base::fstat_helper: 0 = fstat (, 0x22A9E0) st_atime=6B126FF
st_size=-40681930227712, st_mode=0x22A9F061,
st_ino=-4583408731929810241, sizeof=96
fstat64: 0 = fstat (3, 0x22A9E0)
//FAT32
get_file_attribute: file: e:\README.txt
read_ea: 1. chance, C000004F = NtQueryEaFile (e:\README.txt, .UNIXATTR),
Win32 error 282
read_ea: C000004F = NtQueryEaFile (e:\README.txt, .UNIXATTR), Win32
error 282
read_ea: 8313 = read_ea (0, e:\README.txt, .UNIXATTR, 22A9F0, 4)
fhandler_base::fstat_helper: 0 = fstat (, 0x22A9E0) st_atime=6D7072
st_size=3328772759537140781, st_mode=0x22A9F061,
st_ino=-3532118121688219773, sizeof=96
fstat64: 0 = fstat (3, 0x22A9E0)
//NTFS
get_file_attribute: file: c:\README.txt
read_ea: 0 = read_ea (6BC, c:\README.txt, .UNIXATTR, 22A410, 4)
fhandler_base::fstat_helper: 0 = fstat (, 0x22A400) st_atime=4A1A7CA3
st_size=3088, st_mode=0x8124, st_ino=3096224743855743, sizeof=96
fstat64: 0 = fstat (6, 0x22A400)
Thank you
--
David Engraf
Product Engineer
SYSGO AG
Office Mainz
Am Pfaffenstein 14 / D-55270 Klein-Winternheim / Germany
Handelsregister: HRB Mainz 90 HRB 8066
Vorstand: Michael Tiedemann
Aufsichtsratsvorsitzender: Knut Degen
USt(VAT)-Id-Nr.: DE 149062328
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