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Open Source and information security mailing list archives
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Date: Wed, 25 Aug 2010 09:40:16 +0200 From: Kay Sievers <kay.sievers@...y.org> To: Greg KH <gregkh@...e.de> Cc: Alan Cox <alan@...rguk.ukuu.org.uk>, Samo Pogacnik <samo_pogacnik@....net>, linux kernel <linux-kernel@...r.kernel.org>, linux-embedded <linux-embedded@...r.kernel.org> Subject: Re: [PATCH] detour TTY driver - now ttyprintk On Wed, Aug 25, 2010 at 01:12, Greg KH <gregkh@...e.de> wrote: > On Wed, Aug 25, 2010 at 12:22:21AM +0100, Alan Cox wrote: >> > No, it does cover that. You should be able to do that with a simple >> > console redirection to /dev/kmsg What happened when you tried to do >> > that? >> >> stty: standard input: Inappropriate ioctl for device > > Kay, how does systemd handle the kmsg console redirection? Systemd does not steal the console, this is done by plymouth, in the same way blogd can do that. It uses a pty and rewrites the messages. Systemd does pass syslog to the kernel buffer during early boot. Init provides /dev/log. With systemd, the started services usually don't get the console connected, but use syslog anyway or the stdout/err gets redirected to syslog. With systemd the console is not too useful because we start everything in parallel. If all the services would put out stuff there like sysv did, it would look like a real mess. Kay -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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