[Bug 304469] [NEW] Getting DSR-status throws an IOError exception

[Tomas Grahn]

Public bug reported:

When attempting to get the DSR-status of the serial port using pySerial,
it throws an exception. I'm using Ubuntu 8.10 (amd64) with all the
latest updates.

The following code triggers it (executed from IDLE):
>>> import serial
>>> modem = serial.Serial("/dev/ttyUSB0")
>>> modem.getDSR()
Traceback (most recent call last):
  File "<pyshell#3>", line 1, in <module>
    modem.getDSR()
  File "/usr/lib/python2.5/site-packages/serial/serialposix.py", line 399, in getDSR
    s = fcntl.ioctl(self.fd, TIOCMGET, TIOCM_zero_str)
IOError: [Errno 22] Invalid argument

** Affects: pyserial (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Getting DSR-status throws an IOError exception
https://bugs.launchpad.net/bugs/304469
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