ioctl_zos.go (2081B)
1 // Copyright 2020 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 zos && s390x 6 7 package unix 8 9 import ( 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. 19 func IoctlSetInt(fd int, req int, 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. 26 func IoctlSetWinsize(fd int, req int, value *Winsize) error { 27 // TODO: if we get the chance, remove the req parameter and 28 // hardcode TIOCSWINSZ. 29 return ioctlPtr(fd, req, unsafe.Pointer(value)) 30 } 31 32 // IoctlSetTermios performs an ioctl on fd with a *Termios. 33 // 34 // The req value is expected to be TCSETS, TCSETSW, or TCSETSF 35 func IoctlSetTermios(fd int, req int, value *Termios) error { 36 if (req != TCSETS) && (req != TCSETSW) && (req != TCSETSF) { 37 return ENOSYS 38 } 39 err := Tcsetattr(fd, int(req), 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. 49 func IoctlGetInt(fd int, req int) (int, error) { 50 var value int 51 err := ioctlPtr(fd, req, unsafe.Pointer(&value)) 52 return value, err 53 } 54 55 func IoctlGetWinsize(fd int, req int) (*Winsize, error) { 56 var value Winsize 57 err := ioctlPtr(fd, req, unsafe.Pointer(&value)) 58 return &value, err 59 } 60 61 // IoctlGetTermios performs an ioctl on fd with a *Termios. 62 // 63 // The req value is expected to be TCGETS 64 func IoctlGetTermios(fd int, req int) (*Termios, error) { 65 var value Termios 66 if req != TCGETS { 67 return &value, ENOSYS 68 } 69 err := Tcgetattr(fd, &value) 70 return &value, err 71 }