On 05.04.19 11:00, Vincent Whitchurch wrote: > On Fri, Apr 05, 2019 at 10:39:43AM +0200, Enrico Weigelt, metux IT consult > wrote: >> On 03.04.19 16:11, Vincent Whitchurch wrote: >> >>> Especially on embedded systems, it would be convenient to have a simple >>> way to disable the console (both for kernel and userspace) on a system >>> which normally uses it, to free up the UART for other things. >> >> Just symlinking to /dev/null does not work ? > > No, /dev/null does not support the TTY ioctls.
hmm, wo (which programs) do you need, that really need them ? >> OTOH, if you're introducing a dummy console, wouldn't a ringbuffer that, >> can be read out later, a better option ? > > There is already a ttyprintk driver in mainline to send these messages > to the printk ring buffer if one is actually intrested in what is > written to the console. There's no option to enable it via console= in > mainline but I have a patch for that too. Great. IMHO, that would be the better way. --mtx -- Enrico Weigelt, metux IT consult Free software and Linux embedded engineering i...@metux.net -- +49-151-27565287
