Thread: Handle a signal

Hi, in my little programme i have to handle the signal SIGTERM, and following basic steps this is what i do:

Code:

int main(int argc, char* argv[]) {
	if (argc<2) return -1;
	struct sigaction ac;
	serverChannel_t srv;
	channel_t clnt;
	(void)unlink(SOCKPATH);
	snprintf(dirpath, FILENAME_MAX+1, argv[1]);
	if (!(planners=read_planners(dirpath))) {
			perror("Erorr during planners initialization\n");
			exit(EXIT_FAILURE);
	}
	if ((srv=createServerChannel(SOCKPATH))<=0) {
		perror("Erorr during socket initialization");
		exit(EXIT_FAILURE);
	}
	memset(&ac, 0, sizeof(ac));
	ac.sa_handler=sig_handler;   //handler of the function
	sigaction(SIGTERM, &ac, NULL);
        .............................
        .............................
}
/* the handler */
static void sig_handler(int n) {
	int i=0;printf("Handler is executing!\n"); fflush(stdout);
	plan_t * next;
	while (many_tids>0)printf("<%d>;", many_tids);
	if (planners) {
		write_planners(dirpath, planners));
		while (i++<plan_elems) {
			next=planners->nxt;
			dealloca_lista(planners->events);
			free(planners);
			planners=next;
		}
	}
	(void)unlink(SOCKPATH);
	exit(EXIT_SUCCESS);
}

The handler works fine, i mean when the signal is sent to the process the handlers is executed.
The problem is that i have a script bash which does several tests on this program, and one of these is:

Code:

if  ! killall -w -TERM dserver; then
    echo Error: SIGTERM not handled
    exit 1
fi

The killall command return 0 if the process terminates, otherwise it will return a number different from 0, so that script line means, if killall fails print on the screen that message.
the '-w' option specifies that killall has to wait, cause the process might invoke some cleanup function (is my case), so if the process decides to ignore the SIGTERM, killall -w will never return.
Unfortunately what i get wen i run the script is the message "SIGTERM not handled"!
Any idea please?

What happens if you use a logical script?
Such as:-

Code:

if  ! killall -TERM dserver; then
    echo Error: SIGTERM not handled
    exit 1
fi