Re: select(0,NULL,NULL,NULL,&t1) used for delay

[Bob Copeland]

> The select() man page explicitly mentions this usage;
>
> "Some code calls select with all three sets empty, n zero, and a
> non-null timeout as a fairly portable way to sleep with subsecond
> precision."

Perl's documentation also notes it as one of the many ways to do a
subsecond sleep:

>You can effect a sleep of 250 milliseconds this way:
>
>                  select(undef, undef, undef, 0.25);

TMTOWTDI.
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