/*
 * Exercise 3-10 child code.
 */

#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <signal.h>

int main(int argc, char *argv[])
{
	pid_t pid;
	int ret_value;

	pid=getpid();
	ret_value=(int)(pid%256);
	srand((unsigned) pid);
	sleep(rand()%5);

	if(atoi(*(argv+1))%2)
	{
		printf("Child %d is terminating with signal 0008\n", pid);
		kill(pid, 9);
	}
	else
	{
		printf("Child %d is terminating with exit(%04X)\n", pid, ret_value);
		exit(ret_value);
	}
}

/*
adimitro@alef:/student/adimitro/cwork/ch3> ./parent
Forked child 17918
Child 17919 is terminating with signal 0008
Forked child 17919
Forked child 17920
Child 17920 is terminating with exit(0000)
Wait on PID: 17920 returns status: 0000
Wait on PID: 17919 returns status: 0088
Child 17918 is terminating with exit(00FE)
Wait on PID: 17918 returns status: FE00
adimitro@alef:/student/adimitro/cwork/ch3>
/*
 The signals currently defined by  <signal.h> are as follows:

     Name             Value   Default    Event
     SIGHUP           1       Exit       Hangup (see termio(7I))
     SIGINT           2       Exit       Interrupt (see termio(7I))
     SIGQUIT          3       Core       Quit (see termio(7I))
     SIGILL           4       Core       Illegal Instruction
     SIGTRAP          5       Core       Trace or Breakpoint Trap
     SIGABRT          6       Core       Abort
     SIGEMT           7       Core       Emulation Trap
     SIGFPE           8       Core       Arithmetic Exception


As we can see from the definition the SIGFPE creates a core file, dumps a core... whatever you want
to call it and that would set the leftmost bit of the low byte to 1 and then the signal was 8 so in
bin it would be 
0000 0000 1000 1000
which is 0x0088
Cheers 
*/