Re: block_input for some APIs

[Stefan Monnier]

>> Does anyone remember why we block input around calls to functions like
>> getpwnam or tzset or fwrite?
> I think this dates back to when C-g and/or other handlers called
> longjmp.

I'm not completely sure, but my own impression is that this dates back
to before SYNC_INPUT, i.e. with input became available, we'd get an IO
signal and in the handler we'd run a whole bunch of code, since
reentrance was a big issue.  Nowadays we delay this async processing to
the next QUIT so there's no re-entrance issue any more.


        Stefan