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70 lines
2.2 KiB
70 lines
2.2 KiB
7 years ago
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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// Below is derived from Solaris source, so CDDL license is included.
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package gopass
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import (
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"syscall"
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"golang.org/x/sys/unix"
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)
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type terminalState struct {
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state *unix.Termios
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}
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// isTerminal returns true if there is a terminal attached to the given
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// file descriptor.
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// Source: http://src.illumos.org/source/xref/illumos-gate/usr/src/lib/libbc/libc/gen/common/isatty.c
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func isTerminal(fd uintptr) bool {
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var termio unix.Termio
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err := unix.IoctlSetTermio(int(fd), unix.TCGETA, &termio)
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return err == nil
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}
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// makeRaw puts the terminal connected to the given file descriptor into raw
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// mode and returns the previous state of the terminal so that it can be
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// restored.
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// Source: http://src.illumos.org/source/xref/illumos-gate/usr/src/lib/libast/common/uwin/getpass.c
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func makeRaw(fd uintptr) (*terminalState, error) {
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oldTermiosPtr, err := unix.IoctlGetTermios(int(fd), unix.TCGETS)
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if err != nil {
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return nil, err
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}
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oldTermios := *oldTermiosPtr
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newTermios := oldTermios
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newTermios.Lflag &^= syscall.ECHO | syscall.ECHOE | syscall.ECHOK | syscall.ECHONL
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if err := unix.IoctlSetTermios(int(fd), unix.TCSETS, &newTermios); err != nil {
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return nil, err
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}
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return &terminalState{
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state: oldTermiosPtr,
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}, nil
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}
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func restore(fd uintptr, oldState *terminalState) error {
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return unix.IoctlSetTermios(int(fd), unix.TCSETS, oldState.state)
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}
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