why my signal fails to catch the SIGINT

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I wrote a function to catch the SIGINT in this way,
but each time the system still goes as the default function .

Here is the code :
in the main func:

C++

(void) signal(SIGINT, network_stop);

and in network_stop:

C++

void network_stop(int sig) {
  //signal(SIGINT, network_stop);
  close (overlay_conn);

}

anything wrong !?

Posted 11-May-12 1:40am

zhaoyilong1

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TRK3 11-May-12 18:28pm

What you show looks fine. The problem may be somewhere else. Try it with the simplest possible example and see if it works.

See this site:
http://www.alexonlinux.com/signal-handling-in-linux

It has a very simple example that should work. Copy it and compile it to verify it works on your system. (It might not, in which case it's a problem with your OS or toolchain implementing signal in a non standard way.) If it does work, then gradually add to the working example to make it more like your non-working version and see what change breaks it.

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