public TtyContext(ITrace trace, int fd, bool echo)
{
EnsureArgument.NotNull(trace, nameof(trace));
EnsureArgument.PositiveOrZero(fd, nameof(fd));
_trace = trace;
_fd = fd;
int error = 0;
// Capture current terminal settings so we can restore them later
if ((error = Termios_MacOS.tcgetattr(_fd, out termios_MacOS t)) != 0)
{
throw new InteropException("Failed to get initial terminal settings", error);
}
_originalTerm = t;
// Set desired echo state
_trace.WriteLine($"Setting terminal echo state to '{echo}'");
if (echo)
{
t.c_lflag |= LocalFlags.ECHO;
}
else
{
t.c_lflag &= ~LocalFlags.ECHO;
}
if ((error = Termios_MacOS.tcsetattr(_fd, SetActionFlags.TCSAFLUSH, ref t)) != 0)
{
throw new InteropException("Failed to set terminal settings", error);
}
}