root login over serial port using shadow

root login over serial port using shadow

[Eric Bénard]

Hi,

for the followinf, the distro in Angstrom.

When using shadow as the IMAGE_LOGIN_MANAGER, login doesn't work as root 
over the serial port if a password is set for root and whatever the 
setting done under securretty or /etc/security or /etc/login.defs

The problem is the following :
inittab says :
S:2345:respawn:/sbin/getty 115200 ttyS0

getty is using /bin/login as a default. But /bin/login is a link to 
busybox thus when login on the serial port, busybox's login will be used 
and not shadow's login which is at /usr/bin/login

changing inittab to :
S:2345:respawn:/sbin/getty 115200 ttyS0 -l /usr/bin/login
solves the problem.

Now the question : what is the right way to tell the shadow package to 
replace /bin/login of busybox by its proper /usr/bin/login when it's 
installed ?

Many thanks
Eric

Re: root login over serial port using shadow

[Marcin Juszkiewicz]

Dnia środa, 17 marca 2010 o 14:37:25 Eric Bénard napisał(a):
> Hi,
> 
> for the followinf, the distro in Angstrom.
> 
> When using shadow as the IMAGE_LOGIN_MANAGER, login doesn't work as root
> over the serial port if a password is set for root and whatever the
> setting done under securretty or /etc/security or /etc/login.defs
> 
> The problem is the following :
> inittab says :
> S:2345:respawn:/sbin/getty 115200 ttyS0
> 
> getty is using /bin/login as a default. But /bin/login is a link to
> busybox thus when login on the serial port, busybox's login will be used
> and not shadow's login which is at /usr/bin/login
> 
> changing inittab to :
> S:2345:respawn:/sbin/getty 115200 ttyS0 -l /usr/bin/login
> solves the problem.
> 
> Now the question : what is the right way to tell the shadow package to
> replace /bin/login of busybox by its proper /usr/bin/login when it's
> installed ?

You need this commit as it moves login to /bin/ dir:

commit b3045d2a282ef408f599d9a722df61e85ef636b5
Author: Koen Kooi <koen@openembedded.org>
Date:   Fri Mar 5 11:33:36 2010 +0100

    shadow: use u-a on binaries that conflict with util-linux-ng


Regards, 
-- 
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Website:  http://marcin.juszkiewicz.com.pl/
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Re: root login over serial port using shadow

[Eric Bénard]

Hi Marcin,

Le 17/03/2010 15:49, Marcin Juszkiewicz a écrit :
> You need this commit as it moves login to /bin/ dir:
>
> commit b3045d2a282ef408f599d9a722df61e85ef636b5
> Author: Koen Kooi<koen@openembedded.org>
> Date:   Fri Mar 5 11:33:36 2010 +0100
>
>      shadow: use u-a on binaries that conflict with util-linux-ng
>
thanks, my previous image using shadow was compiled on the 03/04, just 
the day before this patch !

Eric