[OpenWrt-Devel] Booting D-Link DNS-313, kernel requirements for OpenWRT?

[Linus Walleij]

On Sun, Feb 11, 2018 at 11:56 PM, Linus Walleij
<linus.walleij at linaro.org> wrote:
> On Mon, Feb 5, 2018 at 11:38 PM, Linus Walleij <linus.walleij at linaro.org> wrote:
>> On Tue, Jan 16, 2018 at 11:22 PM, Linus Walleij <linus.walleij at linaro.org> wrote:
>>
>> No doubt. Ubus didn't come up because it needs unix domain
>> sockets (CONFIG_UNIX).
>
> So I fixed that.
>
>> Please press Enter to activate this console.
>>
>> There is no console when I press enter though.
>> Just goes on:
>>
>> Please press Enter to activate this console.
>> Please press Enter to activate this console.
>> Please press Enter to activate this console.
>
> I digged around a bit here.
>
> procd is running fine. It spawns the askconsole action
> and properly execve() /sbin/askfirst as we could expect
> since the console activation message appears.
>
> However when askfirst tries to execve()
> /usr/libexec/login.sh this exits pretty immediately
> with exit code 4 (printed from exit callback).
>
> I don't know what gives this exit code 4 on anything
> askfirst tries to execute :( or why.

So this is libubox returning 4 EINTR (interrupted system
call) from the uloop_process.

waitpid() returns this while monitoring the process.

I wonder why...

I traced into the kernel and even checked that the
binfmt_script parses and tries to execute the script
using the right /bin/sh parser.

It would be nice to be able to run strace here I guess.
kernel syscall debugging?

Yours,
Linus Walleij
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