ioctl_zos.go (2101B)
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 // +build zos,s390x 7 8 package unix 9 10 import ( 11 "runtime" 12 "unsafe" 13 ) 14 15 // ioctl itself should not be exposed directly, but additional get/set 16 // functions for specific types are permissible. 17 18 // IoctlSetInt performs an ioctl operation which sets an integer value 19 // on fd, using the specified request number. 20 func IoctlSetInt(fd int, req int, value int) error { 21 return ioctl(fd, req, uintptr(value)) 22 } 23 24 // IoctlSetWinsize performs an ioctl on fd with a *Winsize argument. 25 // 26 // To change fd's window size, the req argument should be TIOCSWINSZ. 27 func IoctlSetWinsize(fd int, req int, value *Winsize) error { 28 // TODO: if we get the chance, remove the req parameter and 29 // hardcode TIOCSWINSZ. 30 return ioctlPtr(fd, req, unsafe.Pointer(value)) 31 } 32 33 // IoctlSetTermios performs an ioctl on fd with a *Termios. 34 // 35 // The req value is expected to be TCSETS, TCSETSW, or TCSETSF 36 func IoctlSetTermios(fd int, req int, value *Termios) error { 37 if (req != TCSETS) && (req != TCSETSW) && (req != TCSETSF) { 38 return ENOSYS 39 } 40 err := Tcsetattr(fd, int(req), value) 41 runtime.KeepAlive(value) 42 return err 43 } 44 45 // IoctlGetInt performs an ioctl operation which gets an integer value 46 // from fd, using the specified request number. 47 // 48 // A few ioctl requests use the return value as an output parameter; 49 // for those, IoctlRetInt should be used instead of this function. 50 func IoctlGetInt(fd int, req int) (int, error) { 51 var value int 52 err := ioctlPtr(fd, req, unsafe.Pointer(&value)) 53 return value, err 54 } 55 56 func IoctlGetWinsize(fd int, req int) (*Winsize, error) { 57 var value Winsize 58 err := ioctlPtr(fd, req, unsafe.Pointer(&value)) 59 return &value, err 60 } 61 62 // IoctlGetTermios performs an ioctl on fd with a *Termios. 63 // 64 // The req value is expected to be TCGETS 65 func IoctlGetTermios(fd int, req int) (*Termios, error) { 66 var value Termios 67 if req != TCGETS { 68 return &value, ENOSYS 69 } 70 err := Tcgetattr(fd, &value) 71 return &value, err 72 }