linux-kernel - Re: How to handle concurrent access to /dev/ttyprintk ?

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Message-ID: <ed5347ee800216fbbcb119ee3b5ad3070797fd1e.camel@t-2.net>
Date:   Mon, 12 Apr 2021 14:41:27 +0200
From:   Samo Pogačnik <samo_pogacnik@....net>
To:     Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
Cc:     Petr Mladek <pmladek@...e.com>, Jiri Slaby <jirislaby@...nel.org>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        John Ogness <john.ogness@...utronix.de>,
        linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: How to handle concurrent access to /dev/ttyprintk ?

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.

best regards, Samo