43 lines
1.8 KiB
Diff
43 lines
1.8 KiB
Diff
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From 1e1a2538219e9db49062ba104b459a8ced33694a Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Fri, 23 Dec 2022 18:39:54 +0100
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Subject: [PATCH] docs: remove /dev/tty* confusion
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The text said /dev/tty* as a whole was the VT subsystem and that VT is
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not supported in containers.
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But that's not accurate as /dev/tty* will match /dev/tty too and that
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one device node is special and is not related to VT: it always points to
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the current process own controlling tty, regardless what that is.
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hence, rewrite /dev/tty* as /dev/tty[0-9]*.
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Reference: https://github.com/systemd/systemd/pull/25851/commits/7b3a5e26911c675970f045406161f412cee0ab84
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Signed-off-by: zhaoxiaohu <zhaoxiaohu@kuaishou.com>
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Signed-off-by: yuwang <yuwang@kuaishou.com>
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---
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docs/CONTAINER_INTERFACE.md | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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diff --git a/docs/CONTAINER_INTERFACE.md b/docs/CONTAINER_INTERFACE.md
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index ff458bd..41632b8 100644
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--- a/docs/CONTAINER_INTERFACE.md
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+++ b/docs/CONTAINER_INTERFACE.md
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@@ -292,9 +292,9 @@ care should be taken to avoid naming conflicts. `systemd` (and in particular
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you cannot link them to each other.
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4. Do not pretend that the real VTs are available in the container. The VT
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- subsystem consists of all the devices `/dev/tty*`, `/dev/vcs*`, `/dev/vcsa*`
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- plus their `sysfs` counterparts. They speak specific `ioctl()`s and
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- understand specific escape sequences, that other ptys don't understand.
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+ subsystem consists of all the devices `/dev/tty[0-9]*`, `/dev/vcs*`,
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+ `/dev/vcsa*` plus their `sysfs` counterparts. They speak specific `ioctl()`s
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+ and understand specific escape sequences, that other ptys don't understand.
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Hence, it is explicitly not OK to mount a pty to `/dev/tty1`, `/dev/tty2`,
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`/dev/tty3`. This is explicitly not supported.
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--
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2.33.0
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