From b0475528ce04cf37d36fe3abf6c3c0849834877e Mon Sep 17 00:00:00 2001
From: Justin Cormack <justin.cormack@docker.com>
Date: Wed, 24 May 2017 15:13:33 +0100
Subject: [PATCH] Remove use of cgo

Define tcmakeraw directly in Go instead of using C. Allows for easier
cross compile.

Signed-off-by: Justin Cormack <justin.cormack@docker.com>
---
 console_unix.go |  7 ++-----
 tc_darwin.go    | 12 ++++++++++++
 tc_freebsd.go   | 12 ++++++++++++
 tc_linux.go     | 12 ++++++++++++
 4 files changed, 38 insertions(+), 5 deletions(-)

diff --git a/console_unix.go b/console_unix.go
index fb27011..b3b268d 100644
--- a/console_unix.go
+++ b/console_unix.go
@@ -2,9 +2,6 @@
 
 package console
 
-// #include <termios.h>
-import "C"
-
 import (
 	"os"
 	"unsafe"
@@ -91,8 +88,8 @@ func (m *master) SetRaw() error {
 	if err != nil {
 		return err
 	}
-	C.cfmakeraw((*C.struct_termios)(unsafe.Pointer(&rawState)))
-	rawState.Oflag = rawState.Oflag | C.OPOST
+	rawState = cfmakeraw(rawState)
+	rawState.Oflag = rawState.Oflag | unix.OPOST
 	return tcset(m.f.Fd(), &rawState)
 }
 
diff --git a/tc_darwin.go b/tc_darwin.go
index d86c315..b3c8bd1 100644
--- a/tc_darwin.go
+++ b/tc_darwin.go
@@ -49,3 +49,15 @@ func saneTerminal(f *os.File) error {
 	termios.Oflag &^= unix.ONLCR
 	return tcset(f.Fd(), &termios)
 }
+
+func cfmakeraw(t unix.Termios) unix.Termios {
+	t.Iflag = uint64(uint32(t.Iflag) & ^uint32((unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON)))
+	t.Oflag = uint64(uint32(t.Oflag) & ^uint32(unix.OPOST))
+	t.Lflag = uint64(uint32(t.Lflag) & ^(uint32(unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN)))
+	t.Cflag = uint64(uint32(t.Cflag) & ^(uint32(unix.CSIZE | unix.PARENB)))
+	t.Cflag = t.Cflag | unix.CS8
+	t.Cc[unix.VMIN] = 1
+	t.Cc[unix.VTIME] = 0
+
+	return t
+}
diff --git a/tc_freebsd.go b/tc_freebsd.go
index 478f60a..4a29179 100644
--- a/tc_freebsd.go
+++ b/tc_freebsd.go
@@ -49,3 +49,15 @@ func saneTerminal(f *os.File) error {
 	termios.Oflag &^= unix.ONLCR
 	return tcset(f.Fd(), &termios)
 }
+
+func cfmakeraw(t unix.Termios) unix.Termios {
+	t.Iflag = t.Iflag & ^uint32((unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON))
+	t.Oflag = t.Oflag & ^uint32(unix.OPOST)
+	t.Lflag = t.Lflag & ^(uint32(unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN))
+	t.Cflag = t.Cflag & ^(uint32(unix.CSIZE | unix.PARENB))
+	t.Cflag = t.Cflag | unix.CS8
+	t.Cc[unix.VMIN] = 1
+	t.Cc[unix.VTIME] = 0
+
+	return t
+}
diff --git a/tc_linux.go b/tc_linux.go
index 67c89f0..9a29a70 100644
--- a/tc_linux.go
+++ b/tc_linux.go
@@ -49,3 +49,15 @@ func saneTerminal(f *os.File) error {
 	termios.Oflag &^= unix.ONLCR
 	return tcset(f.Fd(), &termios)
 }
+
+func cfmakeraw(t unix.Termios) unix.Termios {
+	t.Iflag = t.Iflag & ^uint32((unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON))
+	t.Oflag = t.Oflag & ^uint32(unix.OPOST)
+	t.Lflag = t.Lflag & ^(uint32(unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN))
+	t.Cflag = t.Cflag & ^(uint32(unix.CSIZE | unix.PARENB))
+	t.Cflag = t.Cflag | unix.CS8
+	t.Cc[unix.VMIN] = 1
+	t.Cc[unix.VTIME] = 0
+
+	return t
+}