There's a TOCTTOU going from the filename to the file handle, but once you have a handle, - on Windows, another process deleting the file is prevented (unless

There's a TOCTTOU going from the filename to the file handle, but once you have a handle, - on Windows, another process deleting the file is prevented (unless you explicitly opted-in to cooperative FILE_SHARE_DELETE); and - on Linux, another process deleting the file only unlinks its name, and your handle continues working with the nameless file and its content