vfork函数的使用【学习笔记】

#include "apue.h"

int globvar = 6;

int main(void)
{
    int var;
    pid_t pid;

    var = 88;
    printf("before vfork
");
    if((pid = vfork()) < 0){
        err_sys("vfork error");
    }else if(pid == 0){
        globvar++;
        var++;
        _exit(0);
    }

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

    exit(0);
}