THe 'signal' function question

This is a discussion on THe 'signal' function question within the C Programming forums, part of the General Programming Boards category; Hi, I hav a question about the 'signal' function in the signal handling library. say i've got signal( SIGINT, signal_handler ...

  1. #1
    Registered User Nutshell's Avatar
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    THe 'signal' function question

    Hi,

    I hav a question about the 'signal' function in the signal handling library. say i've got
    signal( SIGINT, signal_handler );
    But if the signal_handler function has a parameter. Like a prototype below
    void signal_handler( int signalValue );
    What will signalValue be if i report the signal using 'raise()' ?
    What will be passed to the signal handling function?

    thnx

  2. #2
    Registered User bljonk's Avatar
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    it will return 0 if the raise was successfull, otherwise it will return 1 or -1.

    and the other question is out of my understanding. Sorry about it
    Ünicode¬>world = 10.0£

  3. #3
    Registered User Nutshell's Avatar
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    You havn'et answered my question yet. I only asked one.

    thnx, anybody else?

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    B26354 Deckard's Avatar
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    Re: THe 'signal' function question

    Originally posted by Nutshell
    What will signalValue be if i report the signal using 'raise()' ?
    What will be passed to the signal handling function?
    The numeric value of the signal raised. For example SIGINT == 2 and SIGKILL == 9. You can get a complete listing in the header file /usr/include/signal.h
    Jason Deckard

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    Whatever the value of the SIGINT is. Assuming, of course, that you call raise() like this:

    raise(SIGINT);

    The numeric value of SIGINT is implementation-defined so it needn't be the same on all systems. The only requirements are that it be a positive number. A common value is 2.

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    Registered User Nutshell's Avatar
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    yep thnx

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