diff options
| -rw-r--r-- | winsup/cygwin/fhandler/base.cc | 9 | ||||
| -rw-r--r-- | winsup/cygwin/release/3.4.10 | 3 |
2 files changed, 12 insertions, 0 deletions
diff --git a/winsup/cygwin/fhandler/base.cc b/winsup/cygwin/fhandler/base.cc index 58b63da8d..05e51536f 100644 --- a/winsup/cygwin/fhandler/base.cc +++ b/winsup/cygwin/fhandler/base.cc @@ -773,6 +773,15 @@ fhandler_base::open (int flags, mode_t mode) NtClose (fh); goto done; } + /* Drop sparseness */ + if (pc.file_attributes () & FILE_ATTRIBUTE_SPARSE_FILE) + { + FILE_SET_SPARSE_BUFFER fssb = { SetSparse: FALSE }; + status = NtFsControlFile (fh, NULL, NULL, NULL, &io, + FSCTL_SET_SPARSE, &fssb, sizeof fssb, NULL, 0); + if (NT_SUCCESS (status)) + pc.file_attributes (pc.file_attributes () & ~FILE_ATTRIBUTE_SPARSE_FILE); + } } set_handle (fh); diff --git a/winsup/cygwin/release/3.4.10 b/winsup/cygwin/release/3.4.10 index 02f688583..632ffcd39 100644 --- a/winsup/cygwin/release/3.4.10 +++ b/winsup/cygwin/release/3.4.10 @@ -21,3 +21,6 @@ Bug Fixes - Fix posix_fallocate(3) return value in case of being called on other than regular files. + +- Reset sparseness in case open(2) has been called with O_CREAT|O_TRUNC on + sparse files. |