On Tue, Feb 01, 2005 at 06:48:56AM -0700, Eric Blake wrote:
>This question came up on the coreutils list:
>
>Does cygwin provide any support for sparse files on NTFS volumes that
>support it? lseek() could be patched to use FSCTL_SET_ZERO_DATA when a
>seek jumps past the end of a file open for writing, but there is still the
>issue of when that file is given the FSCTL_SET_SPARSE attribute.
Yes.
% fgrep FSCTL_SET_SPARSE *.cc
fhandler.cc: BOOL r = DeviceIoControl (h, FSCTL_SET_SPARSE, NULL, 0,
NULL,
fhandler.cc: syscall_printf ("%d = DeviceIoControl(%p,
FSCTL_SET_SPARSE, "
There are limitations on when a file is considered sparse, however. The
archives
probably have more details.
cgf
--
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Problem reports: http://cygwin.com/problems.html
Documentation: http://cygwin.com/docs.html
FAQ: http://cygwin.com/faq/
