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@AHEADer
Created Nov 23, 2016
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#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/wait.h>
pid_t p1, p2;
void handler(int s)
{
kill(p1, SIGUSR1);
kill(p2, SIGUSR2);
}
void handler1(int s)
{
printf("Child Process 1 is Killed by Parent!\n");
exit(0);
}
void handler2(int s)
{
printf("Child Process 2 is Killed by Parent!\n");
exit(0);
}
int main()
{
//pid_t p1, p2;
int fildes[2];
const int BSIZE = 100;
char buf[BSIZE];
int status;
status = pipe(fildes);
if (status == -1) {
printf("an error occured!\n");
//exit();
}
int i = 1;
int p = 0;
if((p1 = fork())==0) {
close(fildes[0]);
while(1) {
signal(SIGINT, SIG_IGN);
signal(SIGUSR1, handler1);
write(fildes[1],&i,4);
printf("I send you %d times\n",i);
sleep(1);
i++;
}
close(fildes[1]);
exit(EXIT_SUCCESS);
//break;
}
else if ((p2 = fork())==0) {
close(fildes[1]);
while(1) {
signal(SIGINT, SIG_IGN);
signal(SIGUSR2, handler2);
read(fildes[0],&p,4);
//sleep(1);
printf("I receive you %d times\n",p);
}
close(fildes[0]);
exit(EXIT_SUCCESS);
}
else {
signal(SIGINT, handler);
wait(0);
wait(0);
//while(1);
}
return 0;
}
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