func _C_ai_family(ai *_C_struct_addrinfo) *_C_int            { return &ai.Family }
func _C_ai_flags(ai *_C_struct_addrinfo) *_C_int             { return &ai.Flags }
func _C_ai_next(ai *_C_struct_addrinfo) **_C_struct_addrinfo { return &ai.Next }
func _C_ai_protocol(ai *_C_struct_addrinfo) *_C_int          { return &ai.Protocol }
func _C_ai_socktype(ai *_C_struct_addrinfo) *_C_int          { return &ai.Socktype }

func _C_ai_family(ai *_C_struct_addrinfo) *_C_int            { return &ai.ai_family }
func _C_ai_flags(ai *_C_struct_addrinfo) *_C_int             { return &ai.ai_flags }
func _C_ai_next(ai *_C_struct_addrinfo) **_C_struct_addrinfo { return &ai.ai_next }
func _C_ai_protocol(ai *_C_struct_addrinfo) *_C_int          { return &ai.ai_protocol }
func _C_ai_socktype(ai *_C_struct_addrinfo) *_C_int          { return &ai.ai_socktype }

}

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
}

	Family uint8
	Index  uint16
	Type   uint8
	Nlen   uint8
	Alen   uint8
	Slen   uint8
	Data   [46]int8
	raw    RawSockaddrDatalink
}

// Translate "kern.hostname" to []_C_int{0,1,2,3}.
func nametomib(name string) (mib []_C_int, err error) {
	const siz = unsafe.Sizeof(mib[0])

	// NOTE(rsc): It seems strange to set the buffer to have
	// size CTL_MAXNAME+2 but use only CTL_MAXNAME

	Type   uint8
	Nlen   uint8
	Alen   uint8
	Slen   uint8
	Data   [12]int8
	Rcf    uint16
	Route  [16]uint16
	raw    RawSockaddrDatalink
}

// Translate "kern.hostname" to []_C_int{0,1,2,3}.
func nametomib(name string) (mib []_C_int, err error) {
	const siz = unsafe.Sizeof(mib[0])

	// NOTE(rsc): It seems strange to set the buffer to have
	// size CTL_MAXNAME+2 but use only CTL_MAXNAME

			goto childerror
		}
	}

	if sys.Foreground {
		// This should really be pid_t, however _C_int (aka int32) is
		// generally equivalent.
		pgrp = _C_int(sys.Pgid)
		if pgrp == 0 {
			r1, _, err1 = RawSyscall(SYS_GETPID, 0, 0, 0)
			if err1 != 0 {
				goto childerror
			}

			pgrp = _C_int(r1)
		}

		// Place process group in foreground.

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package unix

import (
	"syscall"
	"unsafe"
)

// Note that pgid should really be pid_t, however _C_int (aka int32) is
// generally equivalent.

func Tcsetpgrp(fd int, pgid int32) (err error) {
	_, _, errno := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), uintptr(syscall.TIOCSPGRP), uintptr(unsafe.Pointer(&pgid)), 0, 0, 0)

			goto childerror
		}
	}

	if sys.Foreground {
		// This should really be pid_t, however _C_int (aka int32) is
		// generally equivalent.
		pgrp = _C_int(sys.Pgid)
		if pgrp == 0 {
			r1, _, err1 = RawSyscall(SYS_GETPID, 0, 0, 0)
			if err1 != 0 {
				goto childerror
			}

			pgrp = _C_int(r1)
		}

		// Place process group in foreground.

package unix

import (
	"syscall"
	"unsafe"
)

//go:linkname ioctlPtr syscall.ioctlPtr
func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error)

// Note that pgid should really be pid_t, however _C_int (aka int32) is
// generally equivalent.

func Tcsetpgrp(fd int, pgid int32) (err error) {
	return ioctlPtr(fd, syscall.TIOCSPGRP, unsafe.Pointer(&pgid))

//sys	readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
//sys	Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
//sys	getcwd(buf []byte) (n int, err error) = SYS___GETCWD