Re: SSH immediately disconnects after logging in

I forwarded your comment on iSH's discord server and the person
who forked iSH-AOK kindly issued a pull request :
https://github.com/ish-app/ish/pull/2783
“This is specifically an iSH ssh->BSD sshd bug”, he comments.

On 2026-07-30 06:17, David Leadbeater wrote:
> On Wed, Jul 29, 2026 at 02:35:15PM +0200, Sylvain Saboua wrote:
>> I'm trying to log in my SSH administration console on my
>> laptop-turned-server.
>> I can connect fine from other devices, whether locally or from remote.
>> Here on iPhone with iSH, an Alpine Linux emulator, I get this strange
>> behavior
>> where it will display the log in prompt (see below) as if the logging 
>> in
>> were
>> successful but immediately disconnect.
> 
> I can reproduce this using iSH to connecting to a 7.9 machine:
> ssh -t user@host /bin/sh
> (press enter, instant disconnect)
> 
> However: ssh -t user@host /bin/cat
> works (i.e. it echos back my input a line at a time).
> 
> It feels like iSH isn't correctly handling terminal state. I suspect
> their "emulation" of Linux and in particular tty line disciplines isn't
> quite correct, there's a few issues about related areas in their 
> tracker
> (e.g. https://github.com/ish-app/ish/pull/2449 -- although I don't 
> think
> that exactly is the issue here). The https://github.com/emkey1/ish-AOK
> fork supports strace, maybe that would be possible to debug with, else
> this feels like a bug report to iSH.

-- 
Sylvain Saboua
looking for a PDP-11