AIX SFTP with chroot : conection closed without error message

[Thierry CHARLES]

Excuse me, I did a "ssh user at host" instead of "sftp user at host". That's 
why it tried to open a tty.




So I tried again with SFTP and I got nothing more :'(

debug1: session_input_channel_req: session 0 req subsystem
debug2: subsystem request for sftp by user cpdp
debug1: subsystem: internal-sftp
Starting session: subsystem 'sftp' for cpdp from 10.1.0.161 port 50442
debug2: fd 3 setting TCP_NODELAY
debug3: packet_set_tos: set IP_TOS 0x08
debug2: fd 9 setting O_NONBLOCK
debug2: fd 8 setting O_NONBLOCK
debug2: fd 11 setting O_NONBLOCK
debug2: channel 0: read<=0 rfd 9 len 0
debug2: channel 0: read failed
debug2: channel 0: close_read
debug2: channel 0: input open -> drain
debug2: channel 0: read 83 from efd 11
debug3: channel 0: discard efd
debug2: channel 0: ibuf empty
debug2: channel 0: send eof
debug2: channel 0: input drain -> closed
debug2: notify_done: reading
debug1: Received SIGCHLD.
debug1: session_by_pid: pid 66584
debug1: session_exit_message: session 0 channel 0 pid 66584
debug2: channel 0: request exit-status confirm 0
debug1: session_exit_message: release channel 0
debug2: channel 0: write failed
debug2: channel 0: close_write
debug2: channel 0: send eow
debug2: channel 0: output open -> closed
debug2: channel 0: read 0 from efd 11
debug2: channel 0: closing read-efd 11
debug2: channel 0: send close
debug3: channel 0: will not send data after close
debug3: channel 0: will not send data after close
debug2: channel 0: rcvd close
Received disconnect from 10.1.0.161: 11: disconnected by user
debug1: do_cleanup
debug3: mm_request_receive entering
debug1: do_cleanup


Thierry


<http://www.infass.com>

Le 01/04/2014 09:50, Thierry CHARLES a écrit :
> I didn't know that I can have different logging level in the sftp 
> process. thanks for the tip
>
> I have tried and there is some information : sftp cannot allocate a tty !
>
> The logs :
>
> Starting session: forced-command (config) 'internal-sftp' on pts/11 
> for cpdp from 10.1.0.161 port 50336
> debug2: fd 3 setting TCP_NODELAY
> debug3: packet_set_tos: set IP_TOS 0x10
> debug2: channel 0: rfd 9 isatty
> debug2: fd 9 setting O_NONBLOCK
> /dev/pts/11: No such file or directory
> debug3: fd 7 is O_NONBLOCK
> open /dev/tty failed - could not set controlling tty: No such file or 
> directory
>
>
> looks like it requires having a duplicate environment inside the 
> chroot :-(
>
> Is there a way to avoid /dev duplication ?
> If not, does anyone know how to do it ?
>
> Thanks,
> Thierry
>
> *Thierry CHARLES*
> Infass Systèmes <http://www.infass.com>
>
> Le 01/04/2014 05:55, Damien Miller a écrit :
>> Adding some debug flags to your sshd_config Subsystem declaration might
>> elicit a little more information, e.g.
>>
>> Subsystem      sftp    internal-sftp -l debug3
>
>
>
> _______________________________________________
> openssh-unix-dev mailing list
> openssh-unix-dev at mindrot.org
> https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev

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