Function getgrnam_r
pub unsafe extern "C" fn getgrnam_r(name: *const c_char, grp: *mut group, buf: *mut c_char, buflen: size_t, result: *mut *mut group) -> c_intgetgrnam_rpub unsafe extern "C" fn getgrnam_r(name: *const c_char, grp: *mut group, buf: *mut c_char, buflen: size_t, result: *mut *mut group) -> c_int