Dne 13.04.2021 (tor) ob 11:41 +0200 je Petr Mladek napisal(a): > On Mon 2021-04-12 14:41:27, Samo Pogačnik wrote: > > Dne 12.04.2021 (pon) ob 19:39 +0900 je Tetsuo Handa napisal(a): > > > What is the intended usage of /dev/ttyprintk ? > > > > > > > The intended use of 'ttyprintk' is to redirect console to /dev/ttyprintk > > via the TIOCCONS ioctl. After successfull redirection, all console > > messages get "merged" with kernel messages and as such automatically > > processed > > (stored/transferred) by the syslog service for example. > > The same can be achieved by /dev/kmsg that was created by systemd > developers. > 'kmsg' and 'ttyprintk' are different types of drivers and as such rather complementary than exclusive. The 'ttyprintk' being a tty driver allows for a system wide automatic redirection of anything written to the console. On the other hand 'kmsg' is probably better suited for a per process output redirection/injection of its output into kernel messages.
Maybe i am wrong, but 'systemd' could also find 'ttyprintk' usefull? best regards, Samo