tag	line	file	source code
pgid	228	include/unistd.h	int setpgid(pid_t pid,pid_t pgid);
pgid	181	kernel/sys.c	int sys_setpgid(int pid, int pgid)
pgid	187	kernel/sys.c	if (!pgid)
pgid	188	kernel/sys.c	pgid = current->pid;
pgid	195	kernel/sys.c	task[i]->pgrp = pgid;