setgid_args
{ AS(setgid_args), 4, (sy_call_t *)sys_setgid }, /* 181 = setgid */
sys_setgid(struct sysmsg *sysmsg, const struct setgid_args *uap)
int sys_setgid (struct sysmsg *sysmsg, const struct setgid_args *);
struct setgid_args setgid;