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Hermes SMTP Server) with ESMTPA ID a3a692438eea7aa176cadaccea5fd48f; Wed, 09 Oct 2024 17:49:34 +0000 (UTC) From: nerdopolis To: Bernd Petrovitsch Cc: pmladek@suse.com, rostedt@goodmis.org, linux-kernel@vger.kernel.org, john.ogness@linutronix.de, gregkh@linuxfoundation.org, tglx@linutronix.de, tony@atomide.com, senozhatsky@chromium.org Subject: Re: VT-less kernels, and /dev/console on x86 Date: Wed, 09 Oct 2024 13:49:33 -0400 Message-ID: <3250581.5fSG56mABF@nerdopolis2> In-Reply-To: <93b4c53a-9f15-4c35-965b-ac889b3061c8@sysprog.at> References: <2669238.7s5MMGUR32.ref@nerdopolis2> <2669238.7s5MMGUR32@nerdopolis2> <93b4c53a-9f15-4c35-965b-ac889b3061c8@sysprog.at> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Mailer: WebService/1.1.22645 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.aol On Wednesday, October 9, 2024 5:24:49 AM EDT Bernd Petrovitsch wrote: > Hi all! > > On 18.08.24 02:09, nerdopolis wrote: > [...] > > I originally brought this up on linux-serial, but I think it makes more sense > > that it's part of how printk console device selection works. Without VTs, while > > most software is able to handle the situation, some userspace programs expect > > /dev/console to still be responsive. Namely systemd. It calls isatty() against > > /dev/console, and since /dev/console on VT-less systems currently defaults to > > /dev/ttyS0, and when /dev/ttyS0 is disconnected, the ioctl's fail, and it > > refuses to write log messages to it. > > What's wrong with fixing systemd? The change was rejected, as they want the isatty() call on /dev/console despite it returning false due to the i/o error https://github.com/systemd/systemd/pull/33690 > > Kind regards, > Bernd >