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73f6b1f68d
Make sure that the (newer) /dev/pts/ptmx is accessible by users. This
is useful e.g. when running containers which symlink /dev/ptmx to
/dev/pts/ptmx on start. The default mode (000) does not allow to
create ptys inside the container.
Using 666 when symlinking /dev/ptmx is also recommended by the kernel
documentation when /dev/ptmx is symlinked:
https://www.kernel.org/doc/Documentation/filesystems/devpts.txt
Also buildroot uses ptmxmode=0666. The patch introducing the change
explains related use cases why this is necessary a bit more in depth:
8196b299ba (diff-2d4604b9e565eb19fa52ce31f282f06c)
(From OE-Core rev: c999bc5ddd9beb5274f77b885e2ac71205e42266)
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>