func Fstatfs(fd int, buf *Statfs_t) (err error) {
	_, _, e1 := Syscall(SYS_FSTATFS, uintptr(fd), uintptr(unsafe.Pointer(buf)), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

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

func Ftruncate(fd int, length int64) (err error) {
	_, _, e1 := Syscall(SYS_FTRUNCATE, uintptr(fd), uintptr(length), 0)
	if e1 != 0 {

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))

	runtime.KeepAlive(fd)
	return wrapSyscallError("setsockopt", err)
}

func setKeepAliveCount(fd *netFD, n int) error {
	if !unix.SupportTCPKeepAliveIdleIntvlCNT() {
		return syscall.EPROTOTYPE
	}

	if n == 0 {
		n = defaultTCPKeepAliveCount
	} else if n < 0 {
		return nil
	}
	err := fd.pfd.SetsockoptInt(syscall.IPPROTO_TCP, sysTCP_KEEPCNT, n)
	runtime.KeepAlive(fd)

	SYS_FCHOWNAT             = 464 // { int|sys||fchownat(int fd, const char *path, uid_t owner, gid_t group, int flag); }
	SYS_FEXECVE              = 465 // { int|sys||fexecve(int fd, char * const *argp, char * const *envp); }
	SYS_FSTATAT              = 466 // { int|sys||fstatat(int fd, const char *path, struct stat *buf, int flag); }

	SYS_FCHOWNAT             = 464 // { int|sys||fchownat(int fd, const char *path, uid_t owner, gid_t group, int flag); }
	SYS_FEXECVE              = 465 // { int|sys||fexecve(int fd, char * const *argp, char * const *envp); }
	SYS_FSTATAT              = 466 // { int|sys||fstatat(int fd, const char *path, struct stat *buf, int flag); }

	// Pre-allocate array of pollfd structures for poll.
	pfds = make([]pollfd, 1, 128)

	// Poll the read side of the pipe.
	pfds[0].fd = rdwake
	pfds[0].events = _POLLIN

	pds = make([]*pollDesc, 1, 128)
	pds[0] = nil
}

func netpollIsPollDescriptor(fd uintptr) bool {
	return fd == uintptr(rdwake) || fd == uintptr(wrwake)
}

// netpollwakeup writes on wrwake to wakeup poll before any changes.
func netpollwakeup() {

//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)

	SYS_MKDIRAT                = 524 // { int mkdirat(int fd, char *path, mode_t mode); }
	SYS_MKFIFOAT               = 525 // { int mkfifoat(int fd, char *path, mode_t mode); }
	SYS_MKNODAT                = 526 // { int mknodat(int fd, char *path, mode_t mode, \
	SYS_READLINKAT             = 527 // { int readlinkat(int fd, char *path, char *buf, \
	SYS_SYMLINKAT              = 528 // { int symlinkat(char *path1, int fd, char *path2); }

#include <stdint.h>
int ioctl(int, unsigned long int, uintptr_t);
*/
import "C"

func ioctl(fd int, req uint, arg uintptr) (err error) {
	r0, er := C.ioctl(C.int(fd), C.ulong(req), C.uintptr_t(arg))
	if r0 == -1 && er != nil {
		err = er
	}
	return
}

func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) {
	r0, er := C.ioctl(C.int(fd), C.ulong(req), C.uintptr_t(uintptr(arg)))
	if r0 == -1 && er != nil {
		err = er
	}