ioctl_unsigned.go (2373B)
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 // +build darwin dragonfly freebsd hurd linux netbsd openbsd 7 8 package unix 9 10 import ( 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. 19 func IoctlSetInt(fd int, req uint, value int) error { 20 return ioctl(fd, req, uintptr(value)) 21 } 22 23 // IoctlSetPointerInt performs an ioctl operation which sets an 24 // integer value on fd, using the specified request number. The ioctl 25 // argument is called with a pointer to the integer value, rather than 26 // passing the integer value directly. 27 func IoctlSetPointerInt(fd int, req uint, value int) error { 28 v := int32(value) 29 return ioctlPtr(fd, req, unsafe.Pointer(&v)) 30 } 31 32 // IoctlSetWinsize performs an ioctl on fd with a *Winsize argument. 33 // 34 // To change fd's window size, the req argument should be TIOCSWINSZ. 35 func IoctlSetWinsize(fd int, req uint, value *Winsize) error { 36 // TODO: if we get the chance, remove the req parameter and 37 // hardcode TIOCSWINSZ. 38 return ioctlPtr(fd, req, unsafe.Pointer(value)) 39 } 40 41 // IoctlSetTermios performs an ioctl on fd with a *Termios. 42 // 43 // The req value will usually be TCSETA or TIOCSETA. 44 func IoctlSetTermios(fd int, req uint, value *Termios) error { 45 // TODO: if we get the chance, remove the req parameter. 46 return ioctlPtr(fd, req, unsafe.Pointer(value)) 47 } 48 49 // IoctlGetInt performs an ioctl operation which gets an integer value 50 // from fd, using the specified request number. 51 // 52 // A few ioctl requests use the return value as an output parameter; 53 // for those, IoctlRetInt should be used instead of this function. 54 func IoctlGetInt(fd int, req uint) (int, error) { 55 var value int 56 err := ioctlPtr(fd, req, unsafe.Pointer(&value)) 57 return value, err 58 } 59 60 func IoctlGetWinsize(fd int, req uint) (*Winsize, error) { 61 var value Winsize 62 err := ioctlPtr(fd, req, unsafe.Pointer(&value)) 63 return &value, err 64 } 65 66 func IoctlGetTermios(fd int, req uint) (*Termios, error) { 67 var value Termios 68 err := ioctlPtr(fd, req, unsafe.Pointer(&value)) 69 return &value, err 70 }