tag	line	file	source code
pgid	432	kernel/sys.c	int sys_setpgid(pid_t pid, pid_t pgid)
pgid	438	kernel/sys.c	if (!pgid)
pgid	439	kernel/sys.c	pgid = current->pid;
pgid	440	kernel/sys.c	if (pgid < 0)
pgid	449	kernel/sys.c	((pgid != pid) &&
pgid	450	kernel/sys.c	(session_of_pgrp(pgid) != current->session)))
pgid	452	kernel/sys.c	task[i]->pgrp = pgid;