return utimensat(dirfd, path, nil, flags)
	}
	if len(ts) != 2 {
		return EINVAL
	}
	return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), flags)
}

func Futimesat(dirfd int, path string, tv []Timeval) error {
	if tv == nil {
		return futimesat(dirfd, path, nil)
	}
	if len(tv) != 2 {
		return EINVAL
	}
	return futimesat(dirfd, path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
}

}

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
}

				err = op.Err
			}
			if sys, ok := err.(*os.SyscallError); ok {
				err = sys.Err
			}
			switch err {
			case syscall.EPERM, syscall.EINVAL:
			default:
				t.Fatalf("WriteMsgUnix failed with %v, want EPERM or EINVAL", err)
			}
		}

		ucred.Pid = int32(os.Getpid())
		ucred.Uid = uint32(os.Getuid())
		ucred.Gid = uint32(os.Getgid())
		oob := syscall.UnixCredentials(&ucred)

		t.Fatalf("syscall.open: %v", err)
	}
	defer syscall.Close(fd)

	buf := bytes.Repeat([]byte{0xCD}, direntBufSize)
	for {
		n, err := syscall.ReadDirent(fd, buf)
		if err == syscall.EINVAL {
			// On linux, 'man getdents64' says that EINVAL indicates “result buffer is too small”.
			// Try a bigger buffer.
			t.Logf("ReadDirent: %v; retrying with larger buffer", err)
			buf = bytes.Repeat([]byte{0xCD}, len(buf)*2)
			continue
		}

// license that can be found in the LICENSE file.

package net

import (
	"errors"
	"io"
	"os"
	"syscall"
)

func (fd *netFD) status(ln int) (string, error) {
	if !fd.ok() {
		return "", syscall.EINVAL
	}

	status, err := os.Open(fd.dir + "/status")
	if err != nil {
		return "", err
	}
	defer status.Close()
	buf := make([]byte, ln)
	n, err := io.ReadFull(status, buf[:])
	if err != nil {

		newPos = f.pos + offset
	case 2:
		var st Stat_t
		if err := Fstat(fd, &st); err != nil {
			return 0, err
		}
		newPos = st.Size + offset
	default:
		return 0, errnoErr(EINVAL)
	}

	if newPos < 0 {
		return 0, errnoErr(EINVAL)
	}

	f.seeked = true
	f.dirIdx = 0 // Reset directory read position. See issue 35767.
	f.pos = newPos
	return newPos, nil
}

func Dup(fd int) (int, error) {

		return nil, EINVAL
	}

	return raw.Addr[:], nil
}

// SetInet4Addr sets a C in_addr/Go []byte (4-byte IPv4 address) value in an
// embedded sockaddr within the Ifreq's union data. v must be 4 bytes in length
// or an error will be returned.
func (ifr *Ifreq) SetInet4Addr(v []byte) error {
	if len(v) != 4 {
		return EINVAL
	}

	var addr [4]byte
	copy(addr[:], v)

// Errno values.
var (
	errEAGAIN error = EAGAIN
	errEINVAL error = EINVAL
	errENOENT error = ENOENT
)

// errnoErr returns common boxed Errno values, to prevent
// allocations at runtime.
func errnoErr(e Errno) error {
	switch e {
	case 0:
		return nil
	case EAGAIN:
		return errEAGAIN
	case EINVAL:
		return errEINVAL
	case ENOENT:
		return errENOENT
	}
	return e
}

}

func Utimes(path string, tv []Timeval) (err error) {
	if len(tv) != 2 {
		return EINVAL
	}
	return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
}

//sys	utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error)

func UtimesNano(path string, ts []Timespec) (err error) {
	if len(ts) != 2 {
		return EINVAL
	}
	return utimensat(_AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
}

//go:build unix

package net

import (
	"runtime"
	"syscall"
)

func (c *conn) writeBuffers(v *Buffers) (int64, error) {
	if !c.ok() {
		return 0, syscall.EINVAL
	}
	n, err := c.fd.writeBuffers(v)
	if err != nil {
		return n, &OpError{Op: "writev", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
	}
	return n, nil
}