vfork函数的使用【学习笔记】

 #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();
 }