4、Dpid_tgetgid()获得进程的实际组IDpid_tgetegid()获得进程的有效组ID【例9-1】获取进程ID。设计步骤[1]在Vim中创建一个新工程文件,命名为“example9_1.c”。[2]在“example9_1.c”中创建代码如下所示。#include#include#includeintmain(){printf("The process ID is %d",getpid()) ; /*本进程*/printf("The parent process ID is %d",getppi