kauth_cred_setgroups
error = kauth_cred_setgroups(ncred, grbuf, SCARG(uap, gidsetsize),
kauth_cred_setgroups(cred, __UNCONST(uuc->cr_groups),
error = kauth_cred_setgroups(ncred, SCARG(uap, gidset),
kauth_cred_setgroups(credp, groups, ngroups, -1, UIO_SYSSPACE);
kauth_cred_setgroups(nd->nd_cr, grbuf,
rv = kauth_cred_setgroups(cred, groups, ngroups, 0, UIO_SYSSPACE);
int kauth_cred_setgroups(kauth_cred_t, const gid_t *, size_t, uid_t,