https://bugs.kde.org/show_bug.cgi?id=491272
Stephan Wezel <s.we...@web.de> changed:
What |Removed |Added
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CC| |s.we...@web.de
--- Comment #8 from Stephan Wezel <s.we...@web.de> ---
@Nate Graham: What is the output of the who command?
kwrited does an separate login using KPtyDevice which does it via
utempter/utmp. Which causes an login entry be generated with "pts/<number>" as
"device"
Depending if util-linux (which provides wall) was compiled with systemd support
or not, wall uses different methods to get the list of logged in users.
Since at least version 2.40.2 of util-linux uses loginctl when systemd support
is active otherwise utmp/wtmp.
when util-linux is compiled without systemd support the output of the who
command looks as follows
<username> tty2 2025-02-01 18:59
<username> pts/0 2025-02-01 19:58 (:0)
The first entry is the login via e.g. sddm. The second entry is the login done
by kwrited.
wall will then write the message to the tty2 and pts/0 devices. The write to
pts/0 is then read by kwrited and send to the notification system.
When util-linux >= 2.40.2 is compiled with systemd support the second entry is
omitted in the output of the who command.
And thus wall tries only to write the message to the tty2 device
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