1// Copyright 2018 The Go Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style 3// license that can be found in the LICENSE file. 4 5// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris 6 7package unix 8 9import ( 10 "runtime" 11 "unsafe" 12) 13 14// ioctl itself should not be exposed directly, but additional get/set 15// functions for specific types are permissible. 16 17// IoctlSetInt performs an ioctl operation which sets an integer value 18// on fd, using the specified request number. 19func IoctlSetInt(fd int, req uint, value int) error { 20 return ioctl(fd, req, uintptr(value)) 21} 22 23// IoctlSetWinsize performs an ioctl on fd with a *Winsize argument. 24// 25// To change fd's window size, the req argument should be TIOCSWINSZ. 26func IoctlSetWinsize(fd int, req uint, value *Winsize) error { 27 // TODO: if we get the chance, remove the req parameter and 28 // hardcode TIOCSWINSZ. 29 err := ioctl(fd, req, uintptr(unsafe.Pointer(value))) 30 runtime.KeepAlive(value) 31 return err 32} 33 34// IoctlSetTermios performs an ioctl on fd with a *Termios. 35// 36// The req value will usually be TCSETA or TIOCSETA. 37func IoctlSetTermios(fd int, req uint, value *Termios) error { 38 // TODO: if we get the chance, remove the req parameter. 39 err := ioctl(fd, req, uintptr(unsafe.Pointer(value))) 40 runtime.KeepAlive(value) 41 return err 42} 43 44// IoctlGetInt performs an ioctl operation which gets an integer value 45// from fd, using the specified request number. 46// 47// A few ioctl requests use the return value as an output parameter; 48// for those, IoctlRetInt should be used instead of this function. 49func IoctlGetInt(fd int, req uint) (int, error) { 50 var value int 51 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 52 return value, err 53} 54 55func IoctlGetWinsize(fd int, req uint) (*Winsize, error) { 56 var value Winsize 57 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 58 return &value, err 59} 60 61func IoctlGetTermios(fd int, req uint) (*Termios, error) { 62 var value Termios 63 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 64 return &value, err 65} 66