On 2017-03-22, Grant Edwards <grant.b.edwa...@gmail.com> wrote:
> On 2017-03-22, Lars Alex Pedersen <l...@kamstrup.com> wrote:
>> I'm pretty sure that the process must run somewhere I just can't locate it.
>> Reloading inittab with the getty line starts the serial command prompt but it
>> is not shown anywhere.
>
> If you've got a command prompt, then getty isn't running -- the shell is.
>
> If you've got a _login_ prompt, then getty is running.
>
>> ps ax
>> PID USER TIME COMMAND
>> 1 root 0:01 init
>> 2 root 0:00 [kthreadd]
>
>> 340 root 0:00 -sh
>
> Bingo.
Just to be clear: when you log in, the busybox getty exec()s the
shell. The shell executable _replaces_ the getty exectuable in the
same process. If you do a 'ps' command while the serial port is
showing the 'login:' prompt, you'll see a 'getty' process running.
After you log in on that serial port, you'll see a process named '-sh'
running with that same PID (that used to be the getty). When the
shell exits, init will start a new 'getty'.
--
Grant Edwards grant.b.edwards Yow! It's a hole all the
at way to downtown Burbank!
gmail.com
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