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pid1: order units using TTYVHangup= after vconsole setup

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The goal of this change is to delay getty services until after
systemd-vconsole-setup has finished. systemd-vconsole-setup starts loadkeys,
and it seems that when loadkeys is interrupted by the TTY hangup call we do
when starting tty services [1], so that loadkeys starts getting EIO from the
ioctl("/dev/tty1", KDSKBENT) syscall it does.

Fixes #26908.

[1] https://github.com/legionus/kbd/issues/92#issuecomment-1554451788

Initially I wanted to add ordering dependencies to individual units, but
TTYVHangup= can be added to other various external units too. The solution with
an implicit dependency should cover those cases too.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek
2023-05-19 17:46:30 +02:00
parent ce0fe01f22
commit e019ea738d
8 changed files with 35 additions and 6 deletions
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src/basic/special.h
+1
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@@ -85,6 +85,7 @@
#define SPECIAL_QUOTACHECK_SERVICE "systemd-quotacheck.service"
#define SPECIAL_QUOTAON_SERVICE "quotaon.service"
#define SPECIAL_REMOUNT_FS_SERVICE "systemd-remount-fs.service"
#define SPECIAL_VCONSOLE_SETUP_SERVICE "systemd-vconsole-setup.service"
#define SPECIAL_VOLATILE_ROOT_SERVICE "systemd-volatile-root.service"
#define SPECIAL_UDEVD_SERVICE "systemd-udevd.service"
#define SPECIAL_GROWFS_SERVICE "systemd-growfs@.service"