grp_allowed_field
if (!grp_allowed_field(oldlimits, name))
if (grp_allowed_field(limits, "gr_name"))
if (grp_allowed_field(limits, "gr_passwd"))
if (grp_allowed_field(limits, "gr_gid"))
if (grp_allowed_field(limits, "gr_mem") && grp->gr_mem[0] != NULL) {