gFileInputStreamQueryInfo(object, attributes, cancellable = NULL, .errwarn = TRUE)
gFileInputStreamQueryInfoAsync(object, attributes, io.priority = 0, cancellable = NULL, callback, user.data = NULL)
gFileInputStreamQueryInfoFinish(object, result, .errwarn = TRUE) GObject
+----GInputStream
+----GFileInputStreamGSeekable.GSeekable, which allows the input
stream to jump to arbitrary positions in the file, provided the
filesystem of the file allows it. To find the position of a file
input stream, use gSeekableTell. To find out if a file input
stream supports seeking, use gSeekableStreamCanSeek().
To position a file input stream, use gSeekableSeek.