[Buildroot] /dev/ttyprinkt usage in BR
Peter Korsgaard
jacmet at uclibc.org
Wed Jan 12 16:02:02 UTC 2011
>>>>> "Yegor" == Yegor Yefremov <yegor_sub1 at visionsystems.de> writes:
Yegor> As of kernel 2.6.37 there is a new pseudo tty device
Yegor> /dev/ttyprinkt, that can make user output through pritnk()
Yegor> routine. How can it be used in BR? What entries should
Yegor> /etc/inittab contain to redirect the console output to
Yegor> /dev/ttyprinkt?
I haven't used it yet, but I guess the only thing you have to do to get
all console output though it is to use devtmpfs (or add the device node
in device_table.txt), and tell init to use it as console. Looking at the
busybox init code, I see it gets the console device from the CONSOLE or
console environment variables, so you would just have to add
CONSOLE=/dev/ttyprintk to the kernel commandline.
Using console=/dev/ttyprintk will probably cause strange behaviour as
that presumably creates a loop, where every kernel message is sent back
in and reprinted.
But again, completely untested.
--
Bye, Peter Korsgaard
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