Move utility package 'term' to pkg/term

term/termios_linux.go

@@ -0,0 +1,44 @@
+package term
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+const (
+	getTermios = syscall.TCGETS
+	setTermios = syscall.TCSETS
+)
+
+type Termios struct {
+	Iflag  uint32
+	Oflag  uint32
+	Cflag  uint32
+	Lflag  uint32
+	Cc     [20]byte
+	Ispeed uint32
+	Ospeed uint32
+}
+
+// MakeRaw put the terminal connected to the given file descriptor into raw
+// mode and returns the previous state of the terminal so that it can be
+// restored.
+func MakeRaw(fd uintptr) (*State, error) {
+	var oldState State
+	if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, getTermios, uintptr(unsafe.Pointer(&oldState.termios))); err != 0 {
+		return nil, err
+	}
+
+	newState := oldState.termios
+
+	newState.Iflag &^= (syscall.IGNBRK | syscall.BRKINT | syscall.PARMRK | syscall.ISTRIP | syscall.INLCR | syscall.IGNCR | syscall.ICRNL | syscall.IXON)
+	newState.Oflag &^= syscall.OPOST
+	newState.Lflag &^= (syscall.ECHO | syscall.ECHONL | syscall.ICANON | syscall.ISIG | syscall.IEXTEN)
+	newState.Cflag &^= (syscall.CSIZE | syscall.PARENB)
+	newState.Cflag |= syscall.CS8
+
+	if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, setTermios, uintptr(unsafe.Pointer(&newState))); err != 0 {
+		return nil, err
+	}
+	return &oldState, nil
+}