diff options
| author | Corinna Vinschen <corinna@vinschen.de> | 2003-02-20 13:14:53 +0300 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2003-02-20 13:14:53 +0300 |
| commit | 7920792369b18fd7d796a61aa7f3dda98c1957c8 (patch) | |
| tree | 7d26abbdd63ae0d57a9c26f61d916412ef85aa25 /winsup/cygwin/fhandler_disk_file.cc | |
| parent | 3f3d479490d6b84dd23f7d150a1520e596698e54 (diff) | |
w32api:
* include/winioctl.h (FSCTL_SET_SPARSE): Define.
cygwin:
* wincap.h (wincaps::supports_sparse_files): New flag.
(wincapc::supports_sparse_files): New method.
* wincap.cc (wincap_unknown): Define value for the new flag.
(wincap_95): Ditto.
(wincap_95osr2): Ditto.
(wincap_98): Ditto.
(wincap_98se): Ditto.
(wincap_me): Ditto.
(wincap_nt3): Ditto.
(wincap_nt4): Ditto.
(wincap_nt4sp4): Ditto.
(wincap_2000): Ditto.
(wincap_xp): Ditto.
* path.h (path_conv::fs_flags): New method.
* fhandler_disk_file.cc: Include winioctl.h for DeviceIoControl.
(fhandler_disk_file::open): Set newly created and truncated files as
sparse on platforms that support it.
Diffstat (limited to 'winsup/cygwin/fhandler_disk_file.cc')
| -rw-r--r-- | winsup/cygwin/fhandler_disk_file.cc | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/winsup/cygwin/fhandler_disk_file.cc b/winsup/cygwin/fhandler_disk_file.cc index 8deb7fb16..27e621708 100644 --- a/winsup/cygwin/fhandler_disk_file.cc +++ b/winsup/cygwin/fhandler_disk_file.cc @@ -26,6 +26,7 @@ details. */ #include "pinfo.h" #include <assert.h> #include <ctype.h> +#include <winioctl.h> #define _COMPILING_NEWLIB #include <dirent.h> @@ -386,6 +387,19 @@ fhandler_disk_file::open (path_conv *real_path, int flags, mode_t mode) return 0; } + /* Set newly created and truncated files as sparse files. */ + if ((real_path->fs_flags () & FILE_SUPPORTS_SPARSE_FILES) + && (get_access () & GENERIC_WRITE) == GENERIC_WRITE + && (get_flags () & (O_CREAT | O_TRUNC))) + { + DWORD dw; + HANDLE h = get_handle (); + BOOL r = DeviceIoControl (h , FSCTL_SET_SPARSE, NULL, 0, NULL, 0, &dw, + NULL); + syscall_printf ("%d = DeviceIoControl(0x%x, FSCTL_SET_SPARSE, NULL, 0, " + "NULL, 0, &dw, NULL)", r, h); + } + set_symlink_p (real_path->issymlink ()); set_execable_p (real_path->exec_state ()); set_socket_p (real_path->issocket ()); |