Set tangle-mode 444 for all source blocks in buffer

Question

How can I tangle all source blocks write protected? The first line of this example is ignored instead of being applied to all blocks as expected:

    #+PROPERTY: header-args:conf :comments link :tangle-mode (identity #o444)

    * Fail: File is NOT write-protected
    #+BEGIN_SRC sh :tangle .NotWorkingReadOnlyDotFile
    echo helloHello
    #+END_SRC

    * Pass: File IS write-protected
    #+BEGIN_SRC sh :tangle .WorkingReadOnlyDotFile :tangle-mode (identity #o444)
    echo helloHello
    #+END_SRC

Answer 1

You're using header-args:conf to set options for conf blocks, for all sh blocks, use

#+PROPERTY: header-args:sh :tangle-mode (identity #o444)

for all blocks, use

#+PROPERTY: header-args :tangle-mode (identity #o444)

See also (info "(org) Header arguments in Org mode properties").