var ctl *os.File
	close := func(fd int) {
		if err != nil {
			syscall.Close(fd)
		}
	}

	path, err := syscall.Fd2path(int(f.Fd()))
	if err != nil {
		return nil, os.NewSyscallError("fd2path", err)
	}
	comp := splitAtBytes(path, "/")
	n := len(comp)
	if n < 3 || comp[0][0:3] != "net" {
		return nil, syscall.EPLAN9
	}

	name := comp[2]
	switch file := comp[n-1]; file {
	case "ctl", "clone":

		const flags = windows.GAA_FLAG_INCLUDE_PREFIX | windows.GAA_FLAG_INCLUDE_GATEWAYS
		err := windows.GetAdaptersAddresses(syscall.AF_UNSPEC, flags, 0, (*windows.IpAdapterAddresses)(unsafe.Pointer(&b[0])), &l)
		if err == nil {
			if l == 0 {
				return nil, nil
			}
			break
		}
		if err.(syscall.Errno) != syscall.ERROR_BUFFER_OVERFLOW {
			return nil, os.NewSyscallError("getadaptersaddresses", err)
		}
		if l <= uint32(len(b)) {

Carlos Amedee <******@****.***> 1715265901 -0400

// Tests a goroutine sitting blocked in a syscall for
// an entire generation. This is a regression test for
// #65196.

//go:build ignore

package main

import (
	"log"
	"os"
	"runtime/trace"
	"syscall"
	"time"
)

func main() {
	// Create a pipe to block on.
	var p [2]int
	if err := syscall.Pipe(p[:]); err != nil {
		log.Fatalf("failed to create pipe: %v", err)
	}

Carlos Amedee <******@****.***> 1715265901 -0400

			if errors.Is(err, syscall.EAGAIN) || errors.Is(err, syscall.ENOBUFS) {
				t.Logf("ignoring write error %v", err)
				rd.Close()
				wr.Close()
				continue
			}
			t.Fatalf("write to fifo %d failed: %v", i, err)
		}
		if _, err := rd.Read(make([]byte, len(msg))); err != nil {
			if errors.Is(err, syscall.EAGAIN) || errors.Is(err, syscall.ENOBUFS) {
				t.Logf("ignoring read error %v", err)

// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package net

import (
	"internal/syscall/windows"
	"os"
	"runtime"
	"syscall"
	"time"
	"unsafe"
)

// Default values of KeepAliveTime and KeepAliveInterval on Windows,
// check out https://learn.microsoft.com/en-us/windows/win32/winsock/sio-keepalive-vals#remarks for details.

//go:build unix || js || wasip1 || windows

package net

import (
	"context"
	"io"
	"os"
	"syscall"
)

func sockaddrToTCP(sa syscall.Sockaddr) Addr {
	switch sa := sa.(type) {
	case *syscall.SockaddrInet4:
		return &TCPAddr{IP: sa.Addr[0:], Port: sa.Port}
	case *syscall.SockaddrInet6:
		return &TCPAddr{IP: sa.Addr[0:], Port: sa.Port, Zone: zoneCache.name(int(sa.ZoneId))}
	}
	return nil
}

//go:build unix

package poll

import (
	"io"
	"runtime"
	"syscall"
)

// Writev wraps the writev system call.
func (fd *FD) Writev(v *[][]byte) (int64, error) {
	if err := fd.writeLock(); err != nil {
		return 0, err
	}
	defer fd.writeUnlock()
	if err := fd.pd.prepareWrite(fd.isFile); err != nil {
		return 0, err
	}

	var iovecs []syscall.Iovec
	if fd.iovecs != nil {
		iovecs = *fd.iovecs
	}

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

// TCP socket options for plan9

package net

import (
	"internal/itoa"
	"syscall"
	"time"
)

func setNoDelay(_ *netFD, _ bool) error {
	return syscall.EPLAN9
}

// Set keep alive period.
func setKeepAliveIdle(fd *netFD, d time.Duration) error {
	if d < 0 {
		return nil
	}