NetNews Usenet Archive 1992 #30/NN_1992_30.iso/spool/comp/lang/c/18445

Text File | 1992-12-16 | 1.5 KB | 42 lines

Newsgroups: comp.lang.c
Path: sparky!uunet!munnari.oz.au!bruce.cs.monash.edu.au!monu6!yoyo.cc.monash.edu.au!alien
From: [e-mail] (Diego Barros)
Subject: Signal() function & CTRL-C checking...
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Date: Wed, 16 Dec 1992 05:39:39 GMT
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I have a quesiton concerning the signal function and how it is used. I'm
trying to set up a routine which is called when anyone of 4 interrupts
occur. When one of them does occur then a single function is called
which will clean up and exit the program. The main reason is to detect
when the user presses CTRL-C to break program execution.

Could someone please explain what exactly the signal prototype in the
signal.h file is declaring (in english?!?) :) As knowing what the
function is declared as would of course help my understanding as to how
to use the function call.

<signal.h>    extern void (*signal(int __sig, (*__func)(int)))(int);

And how should I declare the function which is called when one of the 4
interrupts occur, what's its prototype? And how is signal called
exactly?

Any help, and short C source examples showing the outline and procedures
to do this would be greatly appreciated.


Thanks in advance...
Cheers... :)


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