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| author | Philipp Maier <pmaier@sysmocom.de> | 2021-02-22 16:14:47 +0100 |
|---|---|---|
| committer | Philipp Maier <pmaier@sysmocom.de> | 2021-02-25 16:27:08 +0100 |
| commit | 92bdd5e901a0e590b51af8a0e5807806c09effa6 (patch) | |
| tree | aafcd0fe5016451c2985b142c25d3b39b7e1621e | |
| parent | c8caec293333c7cfd93f29e9e7fa88f9cc78aa8b (diff) | |
serial: don't crash if the device does not exist
The most common reason for pySim to crash is when it is executed without
commandline parameters. Then pySim will expect a serial reader on
/dev/ttyUSB0 since this is the default. Lets check if /dev/ttyUSB0 even
exists before trying to open it.
Change-Id: I7545c728b531e9a796eee8f80f0b08d4097f8399
| -rw-r--r-- | pySim/transport/serial.py | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/pySim/transport/serial.py b/pySim/transport/serial.py index 61195e0..b841b3e 100644 --- a/pySim/transport/serial.py +++ b/pySim/transport/serial.py @@ -25,6 +25,7 @@ from __future__ import absolute_import import serial import time +import os.path from pySim.exceptions import NoCardError, ProtocolError from pySim.transport import LinkBase @@ -34,6 +35,8 @@ from pySim.utils import h2b, b2h class SerialSimLink(LinkBase): def __init__(self, device='/dev/ttyUSB0', baudrate=9600, rst='-rts', debug=False): + if not os.path.exists(device): + raise ValueError("device file %s does not exist -- abort" % device) self._sl = serial.Serial( port = device, parity = serial.PARITY_EVEN, |