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74 lines
2.1 KiB
74 lines
2.1 KiB
// Copyright 2020 The Go Authors. All rights reserved. |
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// Use of this source code is governed by a BSD-style |
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// license that can be found in the LICENSE file. |
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//go:build zos && s390x |
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// +build zos,s390x |
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package unix |
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import ( |
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"runtime" |
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"unsafe" |
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) |
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// ioctl itself should not be exposed directly, but additional get/set |
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// functions for specific types are permissible. |
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// IoctlSetInt performs an ioctl operation which sets an integer value |
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// on fd, using the specified request number. |
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func IoctlSetInt(fd int, req uint, value int) error { |
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return ioctl(fd, req, uintptr(value)) |
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} |
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// IoctlSetWinsize performs an ioctl on fd with a *Winsize argument. |
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// |
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// To change fd's window size, the req argument should be TIOCSWINSZ. |
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func IoctlSetWinsize(fd int, req uint, value *Winsize) error { |
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// TODO: if we get the chance, remove the req parameter and |
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// hardcode TIOCSWINSZ. |
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err := ioctl(fd, req, uintptr(unsafe.Pointer(value))) |
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runtime.KeepAlive(value) |
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return err |
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} |
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// IoctlSetTermios performs an ioctl on fd with a *Termios. |
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// |
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// The req value is expected to be TCSETS, TCSETSW, or TCSETSF |
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func IoctlSetTermios(fd int, req uint, value *Termios) error { |
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if (req != TCSETS) && (req != TCSETSW) && (req != TCSETSF) { |
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return ENOSYS |
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} |
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err := Tcsetattr(fd, int(req), value) |
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runtime.KeepAlive(value) |
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return err |
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} |
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// IoctlGetInt performs an ioctl operation which gets an integer value |
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// from fd, using the specified request number. |
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// |
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// A few ioctl requests use the return value as an output parameter; |
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// for those, IoctlRetInt should be used instead of this function. |
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func IoctlGetInt(fd int, req uint) (int, error) { |
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var value int |
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err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) |
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return value, err |
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} |
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func IoctlGetWinsize(fd int, req uint) (*Winsize, error) { |
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var value Winsize |
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err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) |
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return &value, err |
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} |
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// IoctlGetTermios performs an ioctl on fd with a *Termios. |
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// |
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// The req value is expected to be TCGETS |
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func IoctlGetTermios(fd int, req uint) (*Termios, error) { |
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var value Termios |
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if req != TCGETS { |
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return &value, ENOSYS |
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} |
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err := Tcgetattr(fd, &value) |
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return &value, err |
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}
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