signals

[stevebiks]

okay if im messing with processes and signals/signal handlers, and i want to dissable a the parents signal hadlers, and enable the child's signal handlers, what do i do to dissable those of the parent? thanks for any help

 

[sedj]

Not sure if its the best way, but I do it like this :

#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>


/**
*	Catch SIGTERM term commands
*/
void term_handler(int sig) {

	printf("oooh, I've caught a SIGTERM : %d\n", sig);
  	exit(0);

}

int main(int argc, char* argv[]) {
	// catch SIGTERM (eg, kill -9 PID)
	signal(SIGTERM, term_handler);
	
	// rest of your programme

	return 0;

}

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[marsd]

After your fork() use sigprocmask to reset your blocked
list and sigaction or signal to reset your handlers in the child.

HTH