Re: RFC: subcommand to pause/resume builds

[Ludovic Courtès]

Hi Mark,

Mark H Weaver <mhw@netris.org> skribis:

> Ludovic Courtès <ludo@gnu.org> writes:
>
>> Last, you’d need to send SIGTSTP to the whole process group of the
>> build, like so (I think, haven’t tried):
>>
>>   sudo kill -TSTP -123
>>
>> where 123 is the “SessionPID” shown by ‘guix processes’.  However, doing
>> so may affect build results: processes in the build environment might
>> handle SIGTSTP specially, which can have side effects.  It’s an
>> observable action.
>
> What's the rationale for using SIGTSTP instead of SIGSTOP here?

No good reason; SIGSTOP is safer because it cannot be handled (info
"(libc) Job Control Signals"), and thus my argument above is moot.

Thanks for the correction!

Ludo’.