| from pyroute2 import NSPopen |
| from distutils.spawn import find_executable |
| |
| def has_executable(name): |
| path = find_executable(name) |
| if path is None: |
| raise Exception(name + ": command not found") |
| return path |
| |
| class NSPopenWithCheck(NSPopen): |
| """ |
| A wrapper for NSPopen that additionally checks if the program |
| to be executed is available from the system path or not. |
| If found, it proceeds with the usual NSPopen() call. |
| Otherwise, it raises an exception. |
| """ |
| |
| def __init__(self, nsname, *argv, **kwarg): |
| name = list(argv)[0][0] |
| has_executable(name) |
| super(NSPopenWithCheck, self).__init__(nsname, *argv, **kwarg) |
