[Buildroot] Console login root needing a password

[Buildroot] Console login root needing a password

[Nigel Sollars]

Hello,

Ive built buildroot with a toolchain successfully,  however trying to login
over the console requires a password.  The passwd/shadow is the default.

Looking around google apparently this has to do with wchar is this true?,
if so is there a fix since this is required for gdb on the target.

Regards
Nigel


-- 
?Science is a differential equation. Religion is a boundary condition.?

Alan Turing
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[Buildroot] Console login root needing a password

[Yegor Yefremov]

Am 03.05.2012 01:38, schrieb Nigel Sollars:
> Hello,
> 
> Ive built buildroot with a toolchain successfully,  however trying to login over the console requires a password.  The passwd/shadow is the default.
> 
> Looking around google apparently this has to do with wchar is this true?,  if so is there a fix since this is required for gdb on the target.

Have you tried something like this?

ttyS0::respawn:-/bin/sh

Yegor

[Buildroot] Console login root needing a password

[Nigel Sollars]

Hello Yegor,

The only ttyO2 i have is in inittab and it looks like this:

ttyO2::respawn:/sbin/getty -L ttyO2 115200 vt100

This works fine ( I am able to log in ) on a previous build I did without a
toolchain.

Here is the link that i referred to ( from google )

http://lists.busybox.net/pipermail/buildroot/2010-May/034546.html

Hope this helps
Nige

On Thu, May 3, 2012 at 2:45 AM, Yegor Yefremov
<yegor_sub1@visionsystems.de>wrote:

> Am 03.05.2012 01:38, schrieb Nigel Sollars:
> > Hello,
> >
> > Ive built buildroot with a toolchain successfully,  however trying to
> login over the console requires a password.  The passwd/shadow is the
> default.
> >
> > Looking around google apparently this has to do with wchar is this
> true?,  if so is there a fix since this is required for gdb on the target.
>
> Have you tried something like this?
>
> ttyS0::respawn:-/bin/sh
>
> Yegor
>



-- 
?Science is a differential equation. Religion is a boundary condition.?

Alan Turing
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[Buildroot] Console login root needing a password

[Yegor Yefremov]

Hello Nige,

thy this and let me know if it works:

ttyO2::respawn:-/bin/sh

Yegor

Am 03.05.2012 11:30, schrieb Nigel Sollars:
> Hello Yegor,
>
> The only ttyO2 i have is in inittab and it looks like this:
>
> ttyO2::respawn:/sbin/getty -L ttyO2 115200 vt100
>
> This works fine ( I am able to log in ) on a previous build I did without a toolchain.
>
> Here is the link that i referred to ( from google )
>
> http://lists.busybox.net/pipermail/buildroot/2010-May/034546.html
>
> Hope this helps
> Nige
>
> On Thu, May 3, 2012 at 2:45 AM, Yegor Yefremov <yegor_sub1 at visionsystems.de <mailto:yegor_sub1@visionsystems.de>> wrote:
>
>     Am 03.05.2012 01:38, schrieb Nigel Sollars:
>     > Hello,
>     >
>     > Ive built buildroot with a toolchain successfully,  however trying to login over the console requires a password.  The passwd/shadow is the default.
>     >
>     > Looking around google apparently this has to do with wchar is this true?,  if so is there a fix since this is required for gdb on the target.
>
>     Have you tried something like this?
>
>     ttyS0::respawn:-/bin/sh
>
>     Yegor
>
>
>
>
> -- 
> ?Science is a differential equation. Religion is a boundary condition.?
>                                                                                                              Alan Turing
>

[Buildroot] Console login root needing a password

[Graham Newton]

On 03/05/12 10:30, Nigel Sollars wrote:
> Hello Yegor,
>
> The only ttyO2 i have is in inittab and it looks like this:
>
> ttyO2::respawn:/sbin/getty -L ttyO2 115200 vt100
>
> This works fine ( I am able to log in ) on a previous build I did 
> without a toolchain.
>
> Here is the link that i referred to ( from google )
>
> http://lists.busybox.net/pipermail/buildroot/2010-May/034546.html
>
> Hope this helps
> Nige
>
> On Thu, May 3, 2012 at 2:45 AM, Yegor Yefremov 
> <yegor_sub1 at visionsystems.de <mailto:yegor_sub1@visionsystems.de>> wrote:
>
>     Am 03.05.2012 01:38, schrieb Nigel Sollars:
>     > Hello,
>     >
>     > Ive built buildroot with a toolchain successfully,  however
>     trying to login over the console requires a password.  The
>     passwd/shadow is the default.
>     >
>     > Looking around google apparently this has to do with wchar is
>     this true?,  if so is there a fix since this is required for gdb
>     on the target.
>
>     Have you tried something like this?
>
>     ttyS0::respawn:-/bin/sh
>
>     Yegor
>
>
>
>
> -- 
> "Science is a differential equation. Religion is a boundary condition."
>                                                                                                              
> Alan Turing
>
>
>
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot
Hi
I recently had this issue when I directly mounted the buildroot 
generated filesystem via NFS.  After a frustrating day I discovered that 
the suid bit had be set on the busybox executable.  So when login was 
run busybox ran as an unknown user (not root) and so failed causing the 
login to fail.  The fix was to run chmod -s busybox on the NFS server.  
What was baffeling was that the issue went away if I copied the 
filesystem somewhere else.
In the course of my investigations I found I could login if I tried 
Yegor's solution but it did not give me root access.
Hope this helps
Graham

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[Buildroot] Console login root needing a password

[Thomas Petazzoni]

Le Thu, 03 May 2012 13:35:39 +0100,
Graham Newton <gnewton@peavey-eu.com> a ?crit :

> I recently had this issue when I directly mounted the buildroot 
> generated filesystem via NFS.  After a frustrating day I discovered
> that the suid bit had be set on the busybox executable.  So when
> login was run busybox ran as an unknown user (not root) and so failed
> causing the login to fail.  The fix was to run chmod -s busybox on
> the NFS server. What was baffeling was that the issue went away if I
> copied the filesystem somewhere else.
> In the course of my investigations I found I could login if I tried 
> Yegor's solution but it did not give me root access.

Busybox is normally installed inside the target filesystem image with
the suid bit set. From package/busybox/busybox.mk:

define BUSYBOX_PERMISSIONS
/bin/busybox                     f 4755 0 0 - - - - -
/usr/share/udhcpc/default.script f 755  0 0 - - - - -
endef

Are you sure:

 * You extracted output/images/rootfs.tar as root, and didn't use
   output/target for your NFS export? If you did the latter, then of
   course all permissions would be wrong, because output/target is
   created by Buildroot, which doesn't run as root and therefore can't
   set any special permission.

 * You configured your NFS export with no_root_squash?

Regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] Console login root needing a password

[Nigel Sollars]

Hello,

For this time around Yegor is the winner,  it dropped me to a shell
directly where I was able to set a root password, this allowed me to ssh
into the unit.

Thanks Yegor!

I tested my target toolchain out and that works like a champ.

You buildroot guys kick the proverbial rear end ;).

With much gratitude
Nige

On Thu, May 3, 2012 at 9:42 AM, Thomas Petazzoni <
thomas.petazzoni@free-electrons.com> wrote:

> Le Thu, 03 May 2012 13:35:39 +0100,
> Graham Newton <gnewton@peavey-eu.com> a ?crit :
>
> > I recently had this issue when I directly mounted the buildroot
> > generated filesystem via NFS.  After a frustrating day I discovered
> > that the suid bit had be set on the busybox executable.  So when
> > login was run busybox ran as an unknown user (not root) and so failed
> > causing the login to fail.  The fix was to run chmod -s busybox on
> > the NFS server. What was baffeling was that the issue went away if I
> > copied the filesystem somewhere else.
> > In the course of my investigations I found I could login if I tried
> > Yegor's solution but it did not give me root access.
>
> Busybox is normally installed inside the target filesystem image with
> the suid bit set. From package/busybox/busybox.mk:
>
> define BUSYBOX_PERMISSIONS
> /bin/busybox                     f 4755 0 0 - - - - -
> /usr/share/udhcpc/default.script f 755  0 0 - - - - -
> endef
>
> Are you sure:
>
>  * You extracted output/images/rootfs.tar as root, and didn't use
>   output/target for your NFS export? If you did the latter, then of
>   course all permissions would be wrong, because output/target is
>   created by Buildroot, which doesn't run as root and therefore can't
>   set any special permission.
>
>  * You configured your NFS export with no_root_squash?
>
> Regards,
>
> Thomas
> --
> Thomas Petazzoni, Free Electrons
> Kernel, drivers, real-time and embedded Linux
> development, consulting, training and support.
> http://free-electrons.com
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot
>



-- 
?Science is a differential equation. Religion is a boundary condition.?

Alan Turing
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[Buildroot] Console login root needing a password

[Thomas Petazzoni]

Le Thu, 3 May 2012 23:04:05 -0400,
Nigel Sollars <nsollars@gmail.com> a ?crit :

> For this time around Yegor is the winner,  it dropped me to a shell
> directly where I was able to set a root password, this allowed me to
> ssh into the unit.

Well the thing is that you shouldn't have had to do that in the first
place. Login should just work fine on the serial console.

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] Console login root needing a password

[Yegor Yefremov]

Am 04.05.2012 08:22, schrieb Thomas Petazzoni:
> Le Thu, 3 May 2012 23:04:05 -0400,
> Nigel Sollars <nsollars@gmail.com> a ?crit :
> 
>> For this time around Yegor is the winner,  it dropped me to a shell
>> directly where I was able to set a root password, this allowed me to
>> ssh into the unit.
> 
> Well the thing is that you shouldn't have had to do that in the first
> place. Login should just work fine on the serial console.

With -/bin/sh was actually a tip from as Thomas as I needed to login to pty without a login. And as Thomas says you shouldn't have a problem with default image. Entering "root" as login and without a password is sufficient. After that you can execute passwd root.

Yegor