OpenSSH and stdin/stdout assigning

[Павел Сафронов]

> https://alioth.debian.org/scm/browser.php?group_id=100328
Oh, wrong link, sorry. Navigate to /trunk/daemon/daemon.py there.

2015-10-09 10:54 GMT+03:00 Павел Сафронов <pv.safronov at gmail.com>:
>> Yes, in that we changed the compile time default at some point between those two because pipes have better close semantics for what sshd wants to do.
> Thanks for quick reply, appreciate it.
>
>> That sounds a bit silly.  Which daemons?
> At least python-daemon lib.
> Look here for functions is_process_started_by_superserver() and
> is_detach_process_context_required()
> https://alioth.debian.org/scm/browser.php?group_id=100328
>
> 2015-10-09 5:17 GMT+03:00 Darren Tucker <dtucker at dtucker.net>:
>>
>> On Oct 9, 2015 11:29 AM, "Павел Сафронов" <pv.safronov at gmail.com> wrote:
>>>
>>> Hey, guys, I have a question about a difference between openssh 4.3 and
>>> 5.3.
>>> I have plenty of servers with RHEL5 and RHEL6.
>>> Most of RHEL5 servers have openssh-server version 4.3p2-72.el5_6.3
>>> (kernel 2.6.39-100.7.1uek)
>>> And RHEL6 servers have 5.3p1-111.el6 (kernel 3.8.13-35.el6uek.x86_64)
>>>
>>> So there is the difference in assigning stdin and stdout for ssh
>>> connections. Openssh 4.3 assigns socket (I assume this socket points
>>> to /dev/log
>>
>> No, sshd calls socketpair(2).
>>
>>> I'm wondering is it expected behaviour?
>>
>> Yes, in that we changed the compile time default at some point between those
>> two because pipes have better close semantics for what sshd wants to do.
>>
>>> Is there way to assign pipes in openssh 4.3 too?
>>
>> Recompile it with -DUSE_PIPES.
>>
>>> Looked through code but I'm not very familiar with C programming.
>>>
>>> PS Some daemon libs think that if stdin is socket then daemon is
>>> running from inetd and it is causing some trouble.
>>
>> That sounds a bit silly.  Which daemons?
>
>
>
> --
> С уважением, Сафронов Павел.



-- 
С уважением, Сафронов Павел.