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* fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Don't use

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FileAllInformation info class since it needs a big buffer.  Add a
	comment.
This commit is contained in:
Corinna Vinschen 2009-07-12 13:00:36 +00:00
parent 731a438281
commit 77dcafa5ad
2 changed files with 45 additions and 20 deletions
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6
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,9 @@
2009-07-12 Corinna Vinschen <corinna@vinschen.de>
* fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Don't use
FileAllInformation info class since it needs a big buffer. Add a
comment.
2009-07-07 Dave Korn <dave.korn.cygwin@gmail.com>
* winbase.h (ilockexch): Avoid making 'ret' volatile.

59
winsup/cygwin/fhandler_disk_file.cc
View File

@ -331,16 +331,35 @@ fhandler_base::fstat_by_handle (struct __stat64 *buf)
if (pc.fs_is_nfs ())
return fstat_by_nfs_ea (buf);
struct {
FILE_ALL_INFORMATION fai;
WCHAR buf[NAME_MAX + 1];
} fai_buf;
/* Don't use FileAllInformation info class. It returns a pathname rather
than a filename, so it needs a really big buffer for no good reason
since we don't need the name anyway. So we just call the three info
classes necessary to get all information required by stat(2). */
FILE_BASIC_INFORMATION fbi;
FILE_STANDARD_INFORMATION fsi;
FILE_INTERNAL_INFORMATION fii;
status = NtQueryInformationFile (get_handle (), &io, &fai_buf.fai,
sizeof fai_buf, FileAllInformation);
status = NtQueryInformationFile (get_handle (), &io, &fbi, sizeof fbi,
FileBasicInformation);
if (!NT_SUCCESS (status))
{
debug_printf ("%p = NtQueryInformationFile(%S)",
debug_printf ("%p = NtQueryInformationFile(%S, FileBasicInformation)",
status, pc.get_nt_native_path ());
return -1;
}
status = NtQueryInformationFile (get_handle (), &io, &fsi, sizeof fsi,
FileStandardInformation);
if (!NT_SUCCESS (status))
{
debug_printf ("%p = NtQueryInformationFile(%S, FileStandardInformation)",
status, pc.get_nt_native_path ());
return -1;
}
status = NtQueryInformationFile (get_handle (), &io, &fii, sizeof fii,
FileInternalInformation);
if (!NT_SUCCESS (status))
{
debug_printf ("%p = NtQueryInformationFile(%S, FileInternalInformation)",
status, pc.get_nt_native_path ());
return -1;
}
@ -348,21 +367,21 @@ fhandler_base::fstat_by_handle (struct __stat64 *buf)
support a change timestamp. In that case use the LastWriteTime
entry, as in other calls to fstat_helper. */
if (pc.is_rep_symlink ())
fai_buf.fai.BasicInformation.FileAttributes &= ~FILE_ATTRIBUTE_DIRECTORY;
pc.file_attributes (fai_buf.fai.BasicInformation.FileAttributes);
fbi.FileAttributes &= ~FILE_ATTRIBUTE_DIRECTORY;
pc.file_attributes (fbi.FileAttributes);
return fstat_helper (buf,
fai_buf.fai.BasicInformation.ChangeTime.QuadPart
? *(FILETIME *) (void *) &fai_buf.fai.BasicInformation.ChangeTime
: *(FILETIME *) (void *) &fai_buf.fai.BasicInformation.LastWriteTime,
*(FILETIME *) (void *) &fai_buf.fai.BasicInformation.LastAccessTime,
*(FILETIME *) (void *) &fai_buf.fai.BasicInformation.LastWriteTime,
*(FILETIME *) (void *) &fai_buf.fai.BasicInformation.CreationTime,
fbi.ChangeTime.QuadPart
? *(FILETIME *) (void *) &fbi.ChangeTime
: *(FILETIME *) (void *) &fbi.LastWriteTime,
*(FILETIME *) (void *) &fbi.LastAccessTime,
*(FILETIME *) (void *) &fbi.LastWriteTime,
*(FILETIME *) (void *) &fbi.CreationTime,
get_dev (),
fai_buf.fai.StandardInformation.EndOfFile.QuadPart,
fai_buf.fai.StandardInformation.AllocationSize.QuadPart,
fai_buf.fai.InternalInformation.FileId.QuadPart,
fai_buf.fai.StandardInformation.NumberOfLinks,
fai_buf.fai.BasicInformation.FileAttributes);
fsi.EndOfFile.QuadPart,
fsi.AllocationSize.QuadPart,
fii.FileId.QuadPart,
fsi.NumberOfLinks,
fbi.FileAttributes);
}
int __stdcall