// so this must be executed before CloseFunc.
	fd.pd.close()

	err := fd.SysFile.destroy(fd.Sysfd)

	fd.Sysfd = -1
	runtime_Semrelease(&fd.csema)
	return err
}

// Close closes the FD. The underlying file descriptor is closed by the
// destroy method when there are no remaining references.
func (fd *FD) Close() error {
	if !fd.fdmu.increfAndClose() {
		return errClosing(fd.isFile)
	}

}

func setDeadlineImpl(fd *FD, t time.Time, mode int) error {
	d := t.Sub(time.Now())
	if mode == 'r' || mode == 'r'+'w' {
		fd.rmu.Lock()
		defer fd.rmu.Unlock()
		if fd.rtimer != nil {
			fd.rtimer.Stop()
			fd.rtimer = nil
		}
		fd.rtimedout = false
	}
	if mode == 'w' || mode == 'r'+'w' {
		fd.wmu.Lock()
		defer fd.wmu.Unlock()
		if fd.wtimer != nil {
			fd.wtimer.Stop()

func (fd *FD) SetDeadline(t time.Time) error {
	return setDeadlineImpl(fd, t, 'r'+'w')
}

// SetReadDeadline sets the read deadline associated with fd.
func (fd *FD) SetReadDeadline(t time.Time) error {
	return setDeadlineImpl(fd, t, 'r')
}

// SetWriteDeadline sets the write deadline associated with fd.
func (fd *FD) SetWriteDeadline(t time.Time) error {

		return syscall.EINVAL
	}

	if err := setKeepAlive(c.fd, config.Enable); err != nil {
		return &OpError{Op: "set", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
	}
	if err := setKeepAliveIdle(c.fd, config.Idle); err != nil {
		return &OpError{Op: "set", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
	}
	if err := setKeepAliveInterval(c.fd, config.Interval); err != nil {

		}
		if err := setKeepAliveCount(c.fd, config.Count); err != nil {
			return &OpError{Op: "set", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
		}
	} else if err := setKeepAliveIdleAndIntervalAndCount(c.fd, config.Idle, config.Interval, config.Count); err != nil {
		return &OpError{Op: "set", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
	}

			pathLen,
			oflags|OFLAG_DIRECTORY,
			rights&dirRights,
			fileRights,
			fdflags,
			unsafe.Pointer(&fd),
		)
	}
	return int(fd), errnoErr(errno)
}

func Close(fd int) error {
	errno := fd_close(int32(fd))
	return errnoErr(errno)
}

func CloseOnExec(fd int) {
	// nothing to do - no exec
}

func Mkdir(path string, perm uint32) error {
	if path == "" {
		return EINVAL

	"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)

	return CloseFunc(fd)
}

// Copy creates a copy of the FD.
//
// The FD instance points to the same underlying file descriptor. The file
// descriptor isn't closed until all FD instances that refer to it have been
// closed/destroyed.
func (fd *FD) Copy() FD {
	return FD{
		Sysfd:         fd.Sysfd,
		SysFile:       fd.SysFile.ref(),
		IsStream:      fd.IsStream,
		ZeroReadIsEOF: fd.ZeroReadIsEOF,

}

func (ln *TCPListener) ok() bool { return ln != nil && ln.fd != nil }

func (ln *TCPListener) accept() (*TCPConn, error) {
	fd, err := ln.fd.accept()
	if err != nil {
		return nil, err
	}
	return newTCPConn(fd, ln.lc.KeepAlive, ln.lc.KeepAliveConfig, testPreHookSetKeepAlive, testHookSetKeepAlive), nil
}

func (ln *TCPListener) close() error {
	return ln.fd.Close()
}

//go:build solaris && !illumos

package net

import (
	"internal/syscall/unix"
	"syscall"
	"testing"
	"time"
)

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

	var (
		tcpKeepAliveIdle         int
		tcpKeepAliveInterval     int