This is a nice comprehensive resource. I admire author's perseverance in expounding these edge cases and pursuing to amend them somehow. For many years! Yet fi

This is a nice comprehensive resource. I admire author's perseverance in expounding these edge cases and pursuing to amend them somehow. For many years! Yet filenames is not the only place that can unexpectedly include control chars. For instance here is creation of an user with partially colored username. Still work on GNU/Linux: $ UNAME=$(printf '%b' "iam\033[1;31mred\033[0m\n") $ sudo useradd --create-home "$UNAME" Lot's of tools break in various ways for such user.