Family uint8
	Index  uint16
	Type   uint8
	Nlen   uint8
	Alen   uint8
	Slen   uint8
	Data   [12]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

		Name: _C_GoString(_C_gr_name(grp)),
	}
	return g
}

type bufferKind _C_int

var (
	userBuffer  = bufferKind(_C__SC_GETPW_R_SIZE_MAX)
	groupBuffer = bufferKind(_C__SC_GETGR_R_SIZE_MAX)
)

func (k bufferKind) initialSize() _C_size_t {
	sz := _C_sysconf(_C_int(k))
	if sz == -1 {
		// DragonFly and FreeBSD do not have _SC_GETPW_R_SIZE_MAX.

// it doesn't matter.
//sys	fcntl(fd int, cmd int, arg int) (val int, err error)
//sys	Dup2(old int, new int) (err error)

//sysnb pipe(p *[2]_C_int) (err error)

func Pipe(p []int) (err error) {
	if len(p) != 2 {
		return EINVAL
	}
	var pp [2]_C_int
	err = pipe(&pp)
	if err == nil {
		p[0] = int(pp[0])
		p[1] = int(pp[1])
	}
	return
}

}

//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	sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error)
//sysnb fork() (pid int, err error)
//sysnb execve(path *byte, argv **byte, envp **byte) (err error)
//sysnb exit(res int) (err error)

	SizeofInet6Pktinfo  = 20
	SizeofLinger        = 8
	SizeofSockaddrInet4 = 16
	SizeofSockaddrInet6 = 28
	SizeofTCPInfo       = 0x68
	SizeofUcred         = 12
)

type (
	_C_short     int16
	_C_int       int32
	_C_long      int64
	_C_long_long int64
)

type Timespec struct {
	Sec  int64
	Nsec int64
}

type Timeval struct {
	Sec  int64
	Usec int64
}

	return openat(dirfd, path, flags|O_LARGEFILE, mode)
}

func Pipe(p []int) 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
}

// error number. It's a signed number and a zero value is a non-error
// by convention.
type addrinfoErrno int

func (eai addrinfoErrno) Error() string   { return _C_gai_strerror(_C_int(eai)) }
func (eai addrinfoErrno) Temporary() bool { return eai == _C_EAI_AGAIN }
func (eai addrinfoErrno) Timeout() bool   { return false }

// isAddrinfoErrno is just for testing purposes.

	}
	return
}

func libc_setgroups_trampoline()

//go:cgo_import_dynamic libc_setgroups setgroups "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error) {
	r0, _, e1 := syscall6(abi.FuncPCABI0(libc_wait4_trampoline), uintptr(pid), uintptr(unsafe.Pointer(wstatus)), uintptr(options), uintptr(unsafe.Pointer(rusage)), 0, 0)
	wpid = int(r0)

	}
	return
}

func libc_setgroups_trampoline()

//go:cgo_import_dynamic libc_setgroups setgroups "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error) {
	r0, _, e1 := syscall6(abi.FuncPCABI0(libc_wait4_trampoline), uintptr(pid), uintptr(unsafe.Pointer(wstatus)), uintptr(options), uintptr(unsafe.Pointer(rusage)), 0, 0)
	wpid = int(r0)

	}
	return
}

func libc_setgroups_trampoline()

//go:cgo_import_dynamic libc_setgroups setgroups "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error) {
	r0, _, e1 := syscall6(abi.FuncPCABI0(libc_wait4_trampoline), uintptr(pid), uintptr(unsafe.Pointer(wstatus)), uintptr(options), uintptr(unsafe.Pointer(rusage)), 0, 0)
	wpid = int(r0)