Re: issue with vredir6.sub and AIX - bash (sub-shell) is crashing durig manual replication of test

On 15/10/2020 08:03, Michael Felt wrote:

> $ exec </dev/null
> $ exit
> root@x065:[/data/prj/gnu/bash/bash-5.0.18]
>
> ```
>
> As you can see by the return of the original PS1 - the sub-shell
> (./bash) 'crashed' -- I did not type 'exit' - that is a result of the
> 'exec </dev/null' command the line before.
Upon running "exec </dev/null", the standard input is no longer attached 
to your terminal emulator. Consequently, bash tries to read from 
/dev/null, only to encounter EOF. As there is no further input to be 
processed, it exits.

You can prevent this from happening by running a script, or by using the 
-c option to convey the code. Doing so will launch a non-interactive 
instance of bash that does not read commands from the standard input.

Incidentally, it is not a subshell but an ordinary subprocess.

--
Kerin Millar