#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include "esh-sys-utils.h"

/* A demonstration for CS3214 written by 
 * Dennis Kafura in Spring, 2014
 */

bool sigusr1_blocked=true;
bool sigusr2_blocked=true;
int  sigcont_count = 0;

static void
catch_sigusr1(int signo, siginfo_t* info, void* context)
{
  printf("received SIGUSR1 \n");
}


static void
catch_sigusr2(int signo, siginfo_t* info, void* context)
{
  printf("received SIGUSR2 \n");
}


static void
catch_sigcont(int signo, siginfo_t* info, void* context)
{
   sigcont_count++;
}

int
main()
{
    esh_signal_sethandler(SIGUSR1, catch_sigusr1);
    esh_signal_sethandler(SIGUSR2, catch_sigusr2);
    esh_signal_sethandler(SIGCONT, catch_sigcont);

    esh_signal_block(SIGUSR1);
    esh_signal_block(SIGUSR2);

    while(1){
       if (sigusr1_blocked && (sigcont_count==1)) {
          esh_signal_unblock(SIGUSR1);
          sigusr1_blocked=false;
       }
       if (sigusr2_blocked && (sigcont_count==2)) {
          esh_signal_unblock(SIGUSR2);
          sigusr2_blocked = false;
       }
  }

}