func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
	page := uintptr(offset / 4096)
	if offset != int64(page)*4096 {
		return 0, EINVAL
	}
	return mmap2(addr, length, prot, flags, fd, page)
}

const rlimInf32 = ^uint32(0)
const rlimInf64 = ^uint64(0)

type rlimit32 struct {
	Cur uint32
	Max uint32
}

	}
	return
}

func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
	page := uintptr(offset / 4096)
	if offset != int64(page)*4096 {
		return 0, EINVAL
	}
	return mmap2(addr, length, prot, flags, fd, page)
}

type rlimit32 struct {
	Cur uint32
	Max uint32
}

//sysnb	getrlimit(resource int, rlim *rlimit32) (err error) = SYS_UGETRLIMIT

func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
	page := uintptr(offset / 4096)
	if offset != int64(page)*4096 {
		return 0, EINVAL
	}
	return mmap2(addr, length, prot, flags, fd, page)
}

func setTimespec(sec, nsec int64) Timespec {
	return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
}

func setTimeval(sec, usec int64) Timeval {

}

func Pipe(p []int) (err error) {
	return Pipe2(p, 0)
}

//sysnb	pipe2(p *[2]_C_int, flags int) (err error)

func Pipe2(p []int, flags int) error {
	if len(p) != 2 {
		return EINVAL
	}
	var pp [2]_C_int
	err := pipe2(&pp, flags)
	if err == nil {
		p[0] = int(pp[0])
		p[1] = int(pp[1])
	}
	return err
}

func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) {

		uintptr(reserved), uintptr(locklow), uintptr(lockhigh), uintptr(unsafe.Pointer(ol)))
	if r1 == 0 {
		if e1 != 0 {
			err = error(e1)
		} else {
			err = syscall.EINVAL
		}
	}
	return

		// descriptor to scan the directory again.
		if offset == 0 && whence == 0 {
			fd.Dircookie = 0
			return 0, nil
		} else {
			return 0, syscall.EINVAL
		}
	}

	return syscall.Seek(fd.Sysfd, offset, whence)
}

// https://github.com/WebAssembly/WASI/blob/main/legacy/preview1/docs.md#-dirent-record
const sizeOfDirent = 24

// System specify target computer to search.
func LookupSID(system, account string) (sid *SID, domain string, accType uint32, err error) {
	if len(account) == 0 {
		return nil, "", 0, EINVAL
	}
	acc, e := UTF16PtrFromString(account)
	if e != nil {
		return nil, "", 0, e
	}
	var sys *uint16
	if len(system) > 0 {
		sys, e = UTF16PtrFromString(system)
		if e != nil {

	cmd.SysProcAttr = &syscall.SysProcAttr{
		UseCgroupFD: true,
		CgroupFD:    fd,
	}
	out, err := cmd.CombinedOutput()
	if err != nil {
		if testenv.SyscallIsNotSupported(err) && !errors.Is(err, syscall.EINVAL) {
			// Can be one of:
			// - clone3 not supported (old kernel);
			// - clone3 not allowed (by e.g. seccomp);
			// - lack of CAP_SYS_ADMIN.
			t.Skipf("clone3 with CLONE_INTO_CGROUP not available: %v", err)
		}

//sys	Pause() (err error)

func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
	page := uintptr(offset / 4096)
	if offset != int64(page)*4096 {
		return 0, EINVAL
	}
	return mmap2(addr, length, prot, flags, fd, page)
}

type rlimit32 struct {
	Cur uint32
	Max uint32
}

//sysnb	getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT

	}

	_, e := C.g()
	if e != syscall.E2BIG {
		t.Errorf("got %q, expect %q", e, syscall.E2BIG)
	}
	_, e = C.g2(C.EINVAL, C._expA, C._expB, C._expC, C._expD)
	if e != syscall.EINVAL {
		t.Errorf("got %q, expect %q", e, syscall.EINVAL)
	}
}

// issue 3945

func testPrintf(t *testing.T) {
	C.say()
}

// issue 4054