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ioctl_signed.go (2251B)

      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 aix || solaris
      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 int, 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 int, 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 int, 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 int, 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 int) (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 int) (*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 int) (*Termios, error) {
     66 	var value Termios
     67 	err := ioctlPtr(fd, req, unsafe.Pointer(&value))
     68 	return &value, err
     69 }