SELECT statement

[rhysmeister]

Can anyone point me in the direction of some documentation for the 'select' statement in C. Checked my reference books and google but can't find anything. Cheers!

[sean]

I don't believe I've ever seen a select statement in C. While the absence of evidence is not in and of itself evidence, are you sure there IS a select statement in C? If so, where did you hear about it?

[kermit]

select statement? Perhaps you could give some context of what you are referring to with a little snippet of code..?

[rhysmeister]

OK, I posted a question about serial port programming on www.linuxforum.com/forums. They suggested the use of ther select statement for something I want to do.

select(fd+1, &rdfs, NULL, NULL, &tv);

I managed to compile the example he gave in gcc under fedore core 2 so it must exist. Would just like to understand it before I proceed any further. Thanks.

[sand_man]

i still got no idea what you mean.
where is this select function from and what does it do?

[sean]

There is no such function in standard C. You can either post the example code they gave you and we'd be able to see if it's a user defined function or some other API and send you in the right direction. Do you know C?

[rhysmeister]

Yes I know C. This is not a user defined function and it compiles under gcc / I thought gcc was pretty much standard c but maybe it's specific to it. The select statement is used to wait for data to be available on the serial port and to set a timeout. That's as much information as I can provide on it. Thanks.

[kermit]

did you try 'man select'?

[Codeplug]

In case you don't already have these resources:
Serial HOWTO
Serial Programming HOWTO
Modem-HOWTO

SELECT(2)

gg

[rhysmeister]

Thanks, didn't think to do a man select!! yes have the serial resources. Thanks to all!

[Hammer]

You could always try the FAQ:
http://faq.cprogramming.com/cgi-bin/...=1045780608#03