#include <errno.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "restart.h"

int main(void) {
   pid_t child;
   sigset_t mask, omask;

   if ((sigfillset(&mask) == -1) || 
       (sigprocmask(SIG_SETMASK, &mask, &omask) == -1)) {
      perror("Failed to block the signals");
      return 1;
   }
   if ((child = fork()) == -1) {
      perror("Failed to fork child");
      return 1;
   } 
   if (child == 0) {                                   /* child code */
      execl("/bin/ls", "ls", "-l", NULL); 
      perror("Child failed to exec");
      return 1; 
   }
   if (sigprocmask(SIG_SETMASK, &omask, NULL) == -1){ /* parent code */
      perror("Parent failed to restore signal mask");
      return 1;
   }
  if (r_wait(NULL) == -1) {
     perror("Parent failed to wait for child");
     return 1;
   }
   return 0;
}