if kind == kindOpenFile {
		switch runtime.GOOS {
		case "darwin", "ios", "dragonfly", "freebsd", "netbsd", "openbsd":
			var st syscall.Stat_t
			err := ignoringEINTR(func() error {
				return syscall.Fstat(fd, &st)
			})
			typ := st.Mode & syscall.S_IFMT
			// Don't try to use kqueue with regular files on *BSDs.
			// On FreeBSD a regular file is always
			// reported as ready for writing.

// This implements the [syscall.Conn] interface.
func (c *TCPConn) SyscallConn() (syscall.RawConn, error) {
	if !c.ok() {
		return nil, syscall.EINVAL
	}
	return newRawConn(c.fd), nil
}

// ReadFrom implements the [io.ReaderFrom] ReadFrom method.
func (c *TCPConn) ReadFrom(r io.Reader) (int64, error) {
	if !c.ok() {
		return 0, syscall.EINVAL
	}
	n, err := c.readFrom(r)

	header windows.REPARSE_DATA_BUFFER_HEADER
	detail [syscall.MAXIMUM_REPARSE_DATA_BUFFER_SIZE]byte
}

func createDirLink(link string, rdb *_REPARSE_DATA_BUFFER) error {
	err := os.Mkdir(link, 0777)
	if err != nil {
		return err
	}

	linkp := syscall.StringToUTF16(link)
	fd, err := syscall.CreateFile(&linkp[0], syscall.GENERIC_WRITE, 0, nil, syscall.OPEN_EXISTING,

// Note that sometimes we use a lowercase //sys name and
// wrap it in our own nicer implementation.

package syscall

import (
	"unsafe"
)

func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)

	< io;

	RUNTIME
	< arena;

	syscall !< io;
	reflect !< sort;

	RUNTIME, unicode/utf8
	< path;

	unicode !< path;

	# SYSCALL is RUNTIME plus the packages necessary for basic system calls.
	RUNTIME, unicode/utf8, unicode/utf16
	< internal/syscall/windows/sysdll, syscall/js
	< syscall
	< internal/syscall/unix, internal/syscall/windows, internal/syscall/windows/registry
	< internal/syscall/execenv

	CLONE_IO             = 0x80000000 // Clone io context

	// Flags for the clone3() syscall.

	CLONE_CLEAR_SIGHAND = 0x100000000 // Clear any signal handler and reset to SIG_DFL.
	CLONE_INTO_CGROUP   = 0x200000000 // Clone into a specific cgroup given the right permissions.

	// Cloning flags intersect with CSIGNAL so can be used with unshare and clone3
	// syscalls only:

	CLONE_NEWTIME = 0x00000080 // New time namespace
)

	origLimit := syscall.OrigRlimitNofile()
	origRlimitNofile := syscall.GetInternalOrigRlimitNofile()

	if origLimit == nil {
		defer origRlimitNofile.Store(origLimit)
		origRlimitNofile.Store(&syscall.Rlimit{
			Cur: 1024,
			Max: 65536,
		})
	}

	// Get current process's nofile limit
	var lim syscall.Rlimit
	if err := syscall.Prlimit(0, syscall.RLIMIT_NOFILE, nil, &lim); err != nil {

// type, such as [syscall.WaitStatus] on Unix, to access its contents.
func (p *ProcessState) Sys() any {
	return p.sys()
}

// SysUsage returns system-dependent resource usage information about
// the exited process. Convert it to the appropriate underlying
// type, such as [*syscall.Rusage] on Unix, to access its contents.
// (On Unix, *syscall.Rusage matches struct rusage as defined in the

	StandardName                [32]uint16
	StandardDate                syscall.Systemtime
	StandardBias                int32
	DaylightName                [32]uint16
	DaylightDate                syscall.Systemtime
	DaylightBias                int32
	TimeZoneKeyName             [128]uint16
	DynamicDaylightTimeDisabled uint8
}

var (
	modkernel32 = syscall.NewLazyDLL("kernel32.dll")

//
//	// INVALID: conversion of nil pointer
//	u := unsafe.Pointer(nil)
//	p := unsafe.Pointer(uintptr(u) + offset)
//
// (4) Conversion of a Pointer to a uintptr when calling [syscall.Syscall].
//
// The Syscall functions in package syscall pass their uintptr arguments directly
// to the operating system, which then may, depending on the details of the call,
// reinterpret some of them as pointers.