linux-kernel - Re: serial console _after_ boot ?

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Message-ID: <Pine.LNX.4.64.0801031604130.26693@fbirervta.pbzchgretzou.qr>
Date:	Thu, 3 Jan 2008 16:04:47 +0100 (CET)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	devzero@....de
cc:	linux-kernel@...r.kernel.org
Subject: Re: serial console _after_ boot ? - was: Redirect kernel console

On Jan 3 2008 15:39, devzero@....de wrote:
>fantastic, thanks!
>
>unfortunately......
>
>opensuse103:/home/roland/serialcons # ./mytioccons
>ioctl: Device or resource busy
>
>but i`m not deep enough into programming to understand this.
>

>int main(void)
>{
>int fd = open("/dev/ttyS0", O_RDWR);
>int errno;

This errno is so out of place.

>
>ioctl(0, TIOCCONS, NULL);
>
>if (ioctl(fd, TIOCCONS, NULL) < 0)
>        printf("ioctl: %s\n", strerror(errno));
>}
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