SELECT statement

This is a discussion on SELECT statement within the C Programming forums, part of the General Programming Boards category; Can anyone point me in the direction of some documentation for the 'select' statement in C. Checked my reference books ...

  1. #1
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    SELECT statement

    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!

  2. #2
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    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?

  3. #3
    ... kermit's Avatar
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    select statement? Perhaps you could give some context of what you are referring to with a little snippet of code..?
    Last edited by kermit; 09-11-2004 at 10:24 AM.

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    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.

    Code:
    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.

  5. #5
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    i still got no idea what you mean.
    where is this select function from and what does it do?

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    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?

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    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.

  8. #8
    ... kermit's Avatar
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    did you try 'man select'?

  9. #9
    Registered User Codeplug's Avatar
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    In case you don't already have these resources:
    Serial HOWTO
    Serial Programming HOWTO
    Modem-HOWTO

    SELECT(2)

    gg

  10. #10
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    Thanks, didn't think to do a man select!! yes have the serial resources. Thanks to all!

  11. #11
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    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

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