// reissued the fd in a later call to open(2), leading
		// to crashes being written to the wrong file.
		//
		// So, we duplicate the fd to obtain a private one
		// that cannot be closed by the user.
		// This also alleviates us from concerns about the
		// lifetime and finalization of f.
		// (DupCloseOnExec returns an fd, not a *File, so
		// there is no finalizer, and we are responsible for

func futimes(fd int, timeval *[2]Timeval) (err error) {
	_, _, e1 := Syscall(SYS_FUTIMES, uintptr(fd), uintptr(unsafe.Pointer(timeval)), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

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

func fcntl(fd int, cmd int, arg int) (val int, err error) {
	r0, _, e1 := Syscall(SYS_FCNTL, uintptr(fd), uintptr(cmd), uintptr(arg))

func futimes(fd int, timeval *[2]Timeval) (err error) {
	_, _, e1 := Syscall(SYS_FUTIMES, uintptr(fd), uintptr(unsafe.Pointer(timeval)), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

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

func fcntl(fd int, cmd int, arg int) (val int, err error) {
	r0, _, e1 := Syscall(SYS_FCNTL, uintptr(fd), uintptr(cmd), uintptr(arg))

		}
	}

	// Pass 1: look for fd[i] < i and move those up above len(fd)
	// so that pass 2 won't stomp on an fd it needs later.
	if pipe < nextfd {
		r1, _, _ = RawSyscall(SYS_DUP, uintptr(pipe), uintptr(nextfd), 0)
		if int32(r1) == -1 {
			goto childerror
		}
		pipe = nextfd
		nextfd++
	}
	for i = 0; i < len(fd); i++ {
		if fd[i] >= 0 && fd[i] < i {
			if nextfd == pipe { // don't stomp on pipe

		remain, r = lr.N, lr.R
		if remain <= 0 {
			return 0, nil, true
		}
	}

	var s *netFD
	switch v := r.(type) {
	case *TCPConn:
		s = v.fd
	case tcpConnWithoutWriteTo:
		s = v.fd
	case *UnixConn:
		if v.fd.net != "unix" {
			return 0, nil, false
		}
		s = v.fd
	default:
		return 0, nil, false
	}

	written, handled, err = pollSplice(&c.pfd, &s.pfd, remain)
	if lr != nil {
		lr.N -= written
	}

	"time"
)

func getCurrentKeepAliveSettings(fd fdType) (cfg KeepAliveConfig, err error) {
	tcpKeepAlive, err := syscall.GetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_KEEPALIVE)
	if err != nil {
		return
	}
	tcpKeepAliveIdle, err := syscall.GetsockoptInt(fd, syscall.IPPROTO_TCP, syscall_TCP_KEEPIDLE)
	if err != nil {
		return
	}
	tcpKeepAliveInterval, err := syscall.GetsockoptInt(fd, syscall.IPPROTO_TCP, syscall_TCP_KEEPINTVL)

	SYS_MKFIFOAT       = 319 // { int sys_mkfifoat(int fd, const char *path, mode_t mode); }
	SYS_MKNODAT        = 320 // { int sys_mknodat(int fd, const char *path, mode_t mode, dev_t dev); }
	SYS_OPENAT         = 321 // { int sys_openat(int fd, const char *path, int flags, ... mode_t mode); }

//go:build unix

package poll

import "syscall"

// SetsockoptByte wraps the setsockopt network call with a byte argument.
func (fd *FD) SetsockoptByte(level, name int, arg byte) error {
	if err := fd.incref(); err != nil {
		return err
	}
	defer fd.decref()
	return syscall.SetsockoptByte(fd.Sysfd, level, name, arg)

	if err != nil {
		return nil, err
	}
	return newTCPConn(fd, ln.lc.KeepAlive, ln.lc.KeepAliveConfig, testPreHookSetKeepAlive, testHookSetKeepAlive), nil
}

func (ln *TCPListener) close() error {
	if err := ln.fd.pfd.Close(); err != nil {
		return err
	}
	if _, err := ln.fd.ctl.WriteString("hangup"); err != nil {
		ln.fd.ctl.Close()
		return err
	}
	if err := ln.fd.ctl.Close(); err != nil {
		return err
	}

//go:build wasip1

package net

import (
	"syscall"
)

func (fd *netFD) closeRead() error {
	if fd.fakeNetFD != nil {
		return fd.fakeNetFD.closeRead()
	}
	return fd.shutdown(syscall.SHUT_RD)
}

func (fd *netFD) closeWrite() error {
	if fd.fakeNetFD != nil {
		return fd.fakeNetFD.closeWrite()
	}
	return fd.shutdown(syscall.SHUT_WR)