Get ping realtime stdout and exit code in C using forkpty and execvp

ptytest.c

#include <stdlib.h>
#include <stdio.h>
#include <pty.h>
#include <unistd.h> 
#include <sys/wait.h>
int ptytest(){
	int master;
    pid_t pid;

    pid = forkpty(&master, NULL, NULL, NULL);
    if(pid<0)return 1;
    else if (pid == 0){
		char* args[]={"bash","-c","ping -c 5 8.8.8.8",NULL};
		execvp("/bin/bash",args);
    }
	else{
		FILE* fp=fdopen(master, "r");
		char line[256];
		while(fgets(line,256,fp)){
			printf("[PING] %s",line);
		}
		int status;
		waitpid(pid, &status, 0);
		fclose(fp);
		return WEXITSTATUS(status);
	}
	return 0;
}
int main(){
	int ret=ptytest();
	printf("exit code: %i\n",ret);
	return 0;
}