failure to login on serial console

[Alain D D Williams]

The problem that I have seems much the same as from Feb 2019:

https://www.mail-archive.com/bug-bash@gnu.org/msg22665.html

Try to login on a serial console, see the message:

bash: initialize_job_control: no job control in background: Bad file descriptor

This is what is running:

# ps -ft tty2
UID        PID  PPID  C STIME TTY          TIME CMD
root     18963     1  0 13:45 tty2     00:00:00 /bin/login -p --
addw     19149 18963  0 13:48 tty2     00:00:00 bash --login

When I press any key I get logged out. This is what happens when I press the
key:

# strace -p 19149
strace: Process 19149 attached
pselect6(1, [0], NULL, NULL, NULL, {[], 8}) = 1 (in [0])
read(0, 0x7ffc8237730f, 1)              = -1 EIO (Input/output error)

In my .bash_profile I have the following, something that has been there for
years and caused no problem on my old desktop (CentOS 6, bash version 4.1.2(2))
I am now using bash 5.0.3(1)-release on a Debian-10 x86_64 machine.

[[ -n $SHELL && -z $SSH_AGENT_PID && -z $DISPLAY ]] &&
        exec -l ssh-agent $SHELL -c "bash --login"

If I remove the above 2 lines the problem goes away but means that I do not
have a ssh-agent.

The 2 lines run, as expected, when I ssh localhost

-- 
Alain Williams
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