how to get busybox shell prompt on console port?
Robert P. J. Day
rpjday at mindspring.com
Mon Apr 11 03:06:07 EST 2005
On Sun, 10 Apr 2005, Kylo Ginsberg wrote:
> I use this line in /etc/inittab (assuming you've built busybox to include sh):
>
> ttyCPM0::respawn:-/bin/sh
(first, a caveat: even though this is the 2.6 kernel, i'm still using
devfs for historical reasons. that will change shortly but may be
part of my problems.)
i'm pretty sure i tried that combo, and several others like it, and i
finally had success with the following entry in /etc/inittab:
::respawn:/bin/sh < /dev/console > /dev/console 2> /dev/console
yes, it's disgusting but it works. once i got a prompt, i noticed
that these are the contents of /dev:
crw------- 1 root root 204, 46 Dec 31 1969 <NULL>0
crw------- 1 root root 204, 47 Dec 31 1969 <NULL>1
crw------- 1 root root 5, 1 Oct 2 08:56 console
crw-rw-rw- 1 root root 1, 7 Dec 31 1969 full
drwxr-xr-x 1 root root 0 Dec 31 1969 input
crw-r----- 1 root root 1, 2 Dec 31 1969 kmem
crw-r--r-- 1 root root 1, 11 Dec 31 1969 kmsg
drwxr-xr-x 1 root root 0 Dec 31 1969 loop
crw-r----- 1 root root 1, 1 Dec 31 1969 mem
drwxr-xr-x 1 root root 0 Dec 31 1969 misc
crw-rw-rw- 1 root root 1, 3 Dec 31 1969 null
crw-r----- 1 root root 1, 4 Dec 31 1969 port
crw-rw-rw- 1 root root 5, 2 Dec 31 1969 ptmx
drwxr-xr-x 1 root root 0 Dec 31 1969 pts
drwxr-xr-x 1 root root 0 Dec 31 1969 pty
crw-r--r-- 1 root root 1, 8 Dec 31 1969 random
drwxr-xr-x 1 root root 0 Dec 31 1969 rd
lr-xr-xr-x 1 root root 4 Sep 25 1969 root -> rd/0
drwxr-xr-x 1 root root 0 Dec 31 1969 shm
crw-rw-rw- 1 root root 5, 0 Dec 31 1969 tty
crw-r--r-- 1 root root 1, 9 Dec 31 1969 urandom
crw-rw-rw- 1 root root 1, 5 Dec 31 1969 zero
in other words, no /dev/ttyCPM0 which may be why that first solution
never worked (i'm still fuzzy on support for the serial/console ports
so i'm reading up on that now.) but given that i have a /dev/console,
i'll stick with that for now until i have a better fix.
and what's the two "NULL" entries up there? those are new to me.
rday
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