bug#51135: timeout: --foreground causes exit status 124, even if KILL was used

[Pádraig Brady]

On 11/10/2021 22:11, Christoph Anton Mitterer wrote:
> On Mon, 2021-10-11 at 22:04 +0100, Pádraig Brady wrote:
> > +However if the @option{--foreground} option is specified then
> > +@command{timeout} will not send any signals to its own process,
> > +and so it will exit with one of the other exit status values
> > detailed above.
>
> So 137 is only used when the signal was sent to timeout itself?
>
> I'd have actually found it quite nice if 137 was used *even* with
> --foreground.
>
> That way one could differentiate between whether COMMAND had the chance
> to do cleanups, or whether the calling process should take care on
> that.
>
>
> For example, I use timeout with a program that reads a phassphrase and
> prints it to stdout.
> It disables the terminal's ECHO, so when it has to be killed, the
> calling process would need to re-enable that mnually.

For that use case it's probably best to use --preserve-status,
in which case the 137 from the child getting the SIGKILL
will be propagated through.