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 //go:build darwin || dragonfly || freebsd || hurd || linux || netbsd || openbsd 6 7 package unix 8 9 import ( 10 "unsafe" 11 ) 12 13 // ioctl itself should not be exposed directly, but additional get/set 14 // functions for specific types are permissible. 15 16 // IoctlSetInt performs an ioctl operation which sets an integer value 17 // on fd, using the specified request number. 18 func IoctlSetInt(fd int, req uint, value int) error { 19 return ioctl(fd, req, uintptr(value)) 20 } 21 22 // IoctlSetPointerInt performs an ioctl operation which sets an 23 // integer value on fd, using the specified request number. The ioctl 24 // argument is called with a pointer to the integer value, rather than 25 // passing the integer value directly. 26 func IoctlSetPointerInt(fd int, req uint, value int) error { 27 v := int32(value) 28 return ioctlPtr(fd, req, unsafe.Pointer(&v)) 29 } 30 31 // IoctlSetWinsize performs an ioctl on fd with a *Winsize argument. 32 // 33 // To change fd's window size, the req argument should be TIOCSWINSZ. 34 func IoctlSetWinsize(fd int, req uint, value *Winsize) error { 35 // TODO: if we get the chance, remove the req parameter and 36 // hardcode TIOCSWINSZ. 37 return ioctlPtr(fd, req, unsafe.Pointer(value)) 38 } 39 40 // IoctlSetTermios performs an ioctl on fd with a *Termios. 41 // 42 // The req value will usually be TCSETA or TIOCSETA. 43 func IoctlSetTermios(fd int, req uint, value *Termios) error { 44 // TODO: if we get the chance, remove the req parameter. 45 return ioctlPtr(fd, req, unsafe.Pointer(value)) 46 } 47 48 // IoctlGetInt performs an ioctl operation which gets an integer value 49 // from fd, using the specified request number. 50 // 51 // A few ioctl requests use the return value as an output parameter; 52 // for those, IoctlRetInt should be used instead of this function. 53 func IoctlGetInt(fd int, req uint) (int, error) { 54 var value int 55 err := ioctlPtr(fd, req, unsafe.Pointer(&value)) 56 return value, err 57 } 58 59 func IoctlGetWinsize(fd int, req uint) (*Winsize, error) { 60 var value Winsize 61 err := ioctlPtr(fd, req, unsafe.Pointer(&value)) 62 return &value, err 63 } 64 65 func IoctlGetTermios(fd int, req uint) (*Termios, error) { 66 var value Termios 67 err := ioctlPtr(fd, req, unsafe.Pointer(&value)) 68 return &value, err 69 } 70