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Date:      Mon, 11 Jun 2012 16:53:34 +0300
From:      Sami Halabi <sodynet1@gmail.com>
To:        Ronald Klop <ronald-freebsd8@klop.yi.org>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: su problem
Message-ID:  <CAEW%2BogZFeLSJ2ZERm4wsVSvwAzcSAZHJxQg5YQuGDBMPv2Tppg@mail.gmail.com>
In-Reply-To: <op.wfqbt7hs8527sy@ronaldradial.versatec.local>
References:  <CAEW%2BogYrUso=nqx4dUx0rhr9XUFMmSSMP-fxNa03pgj8tNF%2B%2Bg@mail.gmail.com> <201206091035.q59AZWFB058742@lurza.secnetix.de> <CAOgwaMvp4AyLNdvENL9rXoP6D6w9JaTJr1ML5uxb28Tg9=W2uQ@mail.gmail.com> <CAEW%2BogZ3H%2BgP86zcme-nuucLyDHmUo05uZ3R7Jc1hBb_7FM4gg@mail.gmail.com> <20120609122457.GS13609@albert.catwhisker.org> <CAEW%2BogadUQzu6k1XMXyLkqjEuq-_6gShiG5mRKbBgKMyoviAEg@mail.gmail.com> <20120609123626.GT13609@albert.catwhisker.org> <CAEW%2BogY4zZLj=D9cKuoG58Ozn_UbXjx3GJCT_Gtd4f4zEp3D2A@mail.gmail.com> <4FD37CF3.109@rdtc.ru> <op.wfqbt7hs8527sy@ronaldradial.versatec.local>

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Hi,
I opened 2 terminals with user sody.
in first i hit "su -", and supplied password, it was stcuked.
in the other I did:

%ps xau | grep su
sody  39830  0.0  0.0  9124  1500   0  S+    4:51PM   0:00.00 grep su
root  39812  0.0  0.0 21732  2088   1  I     4:49PM   0:00.00 su -
root  39813  0.0  0.0 21732  2108   1  I+    4:49PM   0:00.00 su -
%procstat -kk 39812
  PID    TID COMM             TDNAME           KSTACK
%procstat -kk 39813
  PID    TID COMM             TDNAME           KSTACK
%


Sami

On Mon, Jun 11, 2012 at 11:14 AM, Ronald Klop
<ronald-freebsd8@klop.yi.org>wrote:

> On Sat, 09 Jun 2012 18:42:27 +0200, Eugene Grosbein <egrosbein@rdtc.ru>
> wrote:
>
>  09.06.2012 19:47, Sami Halabi =D0=BF=D0=B8=D1=88=D0=B5=D1=82:
>>
>>> %su -
>>> Password:
>>> load: 0.00  cmd: su 30588 [ttydcd] 0.91r 0.00u 0.00s 0% 2092k
>>>
>>
>> Perpaps, your system had no keyboard attached at boot time;
>> or for some other reason it booted with /dev/console being serial consol=
e
>> instead of vidconsole. su locks trying to access serial console
>> that is /dev/ttyd0 by default and has Carrier Detect flag enabled.
>> Hence, it waits for CD on the first serial port (miserably and
>> hopelessly).
>>
>> You can check if it's true with "sysctl kern.console" command.
>> You could ask someone to boot the system with keyboard attached -
>> no need to type anything, though. The system should detect it
>> and assingn /dev/ttyv0 as /dev/console instead of /dev/ttyd0.
>> And "su" won't lock.
>>
>> Eugene Grosbein
>>
>
>
> Can you see what su is doing with procstat -kk <pid>?
>
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>



--=20
Sami Halabi
Information Systems Engineer
NMS Projects Expert
FreeBSD SysAdmin Expert



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