Well, you'll probably want to pass in a valid timeval structure if you
don't want it to block.

Basically, that snippet tells select on the list of sockets, looking for
sockets that have data to be read while waiting forever.  That means it
will block until something appears on one of the sockets your


On Thu, 2002-09-19 at 13:43, Justin Clift wrote:
> Hi everyone,
> Am trying my hand at a bit of C code again.  Specifically am trying to
> get Tatsuo's "pgbench" code to loop around more than once, but it keeps
> on hanging forever at this line:
> if ((nsocks = select(maxsock + 1, &input_mask, (fd_set *) NULL,
>       (fd_set *) NULL, (struct timeval *) NULL)) < 0)
> {
> etc
> Running this on a FreeBSD 4.6.2 system with PostgreSQL 7.2.2 and gcc
> 2.95.3.  Looking around the Net seems to say that hangs like this are
> caused by the select blocking, but that's not helping me any with
> knowing what to do.
> Does anyone have an idea of what I can do, or maybe have a few minutes
> to look at my code and point out the problem?
> :-)
> Regards and best wishes,
> Justin Clift
> -- 
> "My grandfather once told me that there are two kinds of people: those
> who work and those who take the credit. He told me to try to be in the
> first group; there was less competition there."
>    - Indira Gandhi
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