Folk and signals - C

I maked sample process in c it plays with folk function to make it pause and resume while clicking ctrl+c

If you have any questions please comment.

Code:

#include <stdio.h>

#include <unistd.h>

#include <signal.h>

void reverse_handler(int sig);

_Bool isPause=0;

_Bool isRunning=1;

int main()

{

int ppid;

int counter=0;

//make parent respond for ctrl+c (pause,resume).

signal(SIGINT,reverse_handler);

while(isRunning){

while(isPause==0)

{

/*code exec while process is resuming */

printf("\nc:%d",counter++);

fflush(stdout);

sleep(1);

}

//close parent after child is alive.

if((ppid=fork())==0){ exit(0); }

//make child respond for ctrl+c (pause,resume).

signal(SIGINT,reverse_handler);

//keep child alive and listening.

while(isPause==1){ /*code exec while process is pausing */ sleep(1); }

}

return 0;

}

//if process is pause made it resume and vice versa.

void reverse_handler(int sig){

if(isPause==0){

printf("\nPaused");

fflush(stdout);

isPause=1;

}

else if(isPause==1){

printf("\nresuming");

fflush(stdout);

isPause=0;

}

}

Thanks..