Source: ioctl.go in package golang.org/x/sys/unix

+build aix darwin dragonfly freebsd linux netbsd openbsd solaris


package unix

import (
	"runtime"
	"unsafe"
)

ioctl itself should not be exposed directly, but additional get/set functions for specific types are permissible.

IoctlSetInt performs an ioctl operation which sets an integer value on fd, using the specified request number.

func IoctlSetInt(fd int, req uint, value int) error {
	return ioctl(fd, req, uintptr(value))
}

IoctlSetPointerInt performs an ioctl operation which sets an integer value on fd, using the specified request number. The ioctl argument is called with a pointer to the integer value, rather than passing the integer value directly.

func IoctlSetPointerInt(fd int, req uint, value int) error {
	v := int32(value)
	return ioctl(fd, req, uintptr(unsafe.Pointer(&v)))
}

IoctlSetWinsize performs an ioctl on fd with a *Winsize argument. To change fd's window size, the req argument should be TIOCSWINSZ.

TODO: if we get the chance, remove the req parameter and hardcode TIOCSWINSZ.

	err := ioctl(fd, req, uintptr(unsafe.Pointer(value)))
	runtime.KeepAlive(value)
	return err
}

IoctlSetTermios performs an ioctl on fd with a *Termios. The req value will usually be TCSETA or TIOCSETA.

TODO: if we get the chance, remove the req parameter.

	err := ioctl(fd, req, uintptr(unsafe.Pointer(value)))
	runtime.KeepAlive(value)
	return err
}

IoctlGetInt performs an ioctl operation which gets an integer value from fd, using the specified request number. A few ioctl requests use the return value as an output parameter; for those, IoctlRetInt should be used instead of this function.

func IoctlGetInt(fd int, req uint) (int, error) {
	var value int
	err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
	return value, err
}

func IoctlGetWinsize(fd int, req uint) (*Winsize, error) {
	var value Winsize
	err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
	return &value, err
}

func IoctlGetTermios(fd int, req uint) (*Termios, error) {
	var value Termios
	err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
	return &value, err