// as it's never used on AIX
// TODO: remove r2 from zsyscall_aix_$GOARCH.go

// Syscall is needed because some packages (like net) need it too.
// The best way is to return EINVAL and let Golang handles its failure
// If the syscall can't fail, this function can redirect it to a real syscall.
//
// This is exported via linkname to assembly in the syscall package.
//
//go:nosplit

func Pipe(p []int) (err error) {
	if len(p) != 2 {
		return EINVAL
	}
	r, w, err := pipe()
	if err == nil {
		p[0], p[1] = r, w
	}
	return
}

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

func Pipe2(p []int, flags int) (err error) {
	if len(p) != 2 {
		return EINVAL
	}
	var pp [2]_C_int
	// pipe2 on dragonfly takes an fds array as an argument, but still

	i := sort.Search(len(sysctlMib), func(i int) bool {
		return sysctlMib[i].ctlname >= name
	})
	if i < len(sysctlMib) && sysctlMib[i].ctlname == name {
		return sysctlMib[i].ctloid, nil
	}
	return nil, EINVAL
}

func direntIno(buf []byte) (uint64, bool) {
	return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))
}

func direntReclen(buf []byte) (uint64, bool) {

	}
	if isSysErrIO(err) {
		return errFaultyDisk
	}
	if isSysErrInvalidArg(err) {
		storageLogIf(context.Background(), err)
		// For some odd calls with O_DIRECT reads
		// filesystems can return EINVAL, handle
		// these as FileNotFound instead.
		return errFileNotFound
	}
	if isSysErrNoSpace(err) {
		return errDiskFull
	}
	return err

	defer serverUp.Close()
	clientDown, serverDown := spawnTestSocketPair(t, "tcp")
	defer clientDown.Close()
	defer serverDown.Close()
	// If splice called poll.Splice here, we'd get err == syscall.EINVAL
	// and handled == false.  If poll.Splice gets an EINVAL on the first
	// try, it assumes the kernel it's running on doesn't support splice
	// for unix sockets and returns handled == false. This works for our

}

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: "wsasend", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
	}
	return n, nil
}

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) {