From: snarfy AT goodnet DOT com
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Signal
Date: 4 Jan 1997 21:46:46 GMT
Organization: GoodNet
Lines: 31
Message-ID: <5amj46$vd6@news.goodnet.com>
NNTP-Posting-Host: goodnet.com
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

>Well, to trap Ctrl-C, just install a signal handler for SIGINT like so:
>
>void my_handler( int sig );
>{
>   ...
>}
>
>signal( SIGINT, my_handler );
>
>Your signal handler can then take care of restoring interrupts,
>deallocating DOS memory, etc.  As far as getting a traceback printed,
>there was a big discussion a while back about how to do it, but I don't
>remember the details.  I'm sure somebody does though.  :)
>
All you need to do is call the old handler which will do the core dump.

Example:


void (*old_handler)(int);
old_handler = signal(SIGINT, my_handler);

void my_handler(int signum)
{
	... free some stuff, cleanup, etc
	old_handler(signum); /* calls the old handler, which does the dump */
}


Josh
snarfy AT goodnet DOT com