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docs: document that systemd closes console during normal runtime

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fixes #21451

Signed-off-by: Arvid E. Picciani <aep@exys.org>
This commit is contained in:
Arvid E. Picciani 2021-12-01 09:21:04 +01:00 committed by Zbigniew Jędrzejewski-Szmek
parent 81513b382b
commit 312dac2869
1 changed files with 4 additions and 1 deletions
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5
docs/CONTAINER_INTERFACE.md
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@ -37,7 +37,10 @@ manager, please consider supporting the following interfaces.
in this context.)
3. Pre-mount `/dev/` as (container private) `tmpfs` for the container and bind
mount some suitable TTY to `/dev/console`. Also, make sure to create device
mount some suitable TTY to `/dev/console`. If this is a pty, make sure to not
close the controling pty master during systemd's lifetime. PID1 will close ttys,
to avoid being killed by SAK. It only opens ttys for the time it
actually needs to print something. Also, make sure to create device
nodes for `/dev/null`, `/dev/zero`, `/dev/full`, `/dev/random`,
`/dev/urandom`, `/dev/tty`, `/dev/ptmx` in `/dev/`. It is not necessary to
create `/dev/fd` or `/dev/stdout`, as systemd will do that on its own. Make