#include "apue.h"

 int globvar = ;

 int main(void)

 {

     int var;

     pid_t pid;

     var = ;

     printf("before vfork\r\n");

     if((pid = vfork()) < ){

         err_sys("vfork error");

     }else if(pid == ){

         globvar++;

         var++;

         _exit();

     }

     printf("pid = %ld,glob = %d,var = %d\r\n",(long)getpid(),globvar,var);

     exit();

 }