readTtyWithTimeout
Read up to count bytes into buffer at offset from the PTY. The number of bytes read will be returned. 0 will be returned if interruptTtyRead is called while waiting for data, or if at least timeoutMillis have passed without data.
Parameters
timeoutMillis
A value of 0 will perform a non-blocking read. Otherwise, valid values are 1 to 999 which represent a maximum time (in milliseconds) to wait for data. Note: This value is not validated.