[augeas-devel] debugging "IOError when saving file"

[Michael]

Hi,

I just added a lens for pagekite:
https://github.com/hercules-team/augeas/pull/153

The tests and basic usage works, I use the lens via the python bindings.
But for two config files (80_httpd.rc and 80_sshd.rc), editing or
deleting existing entries fails with "IOError: Unable to save to
file!"*. Inserting new entries works though.

I failed to get more debugging info following these advices:
https://github.com/hercules-team/augeas/wiki/Debugging-tips#Runtime_debugging

How can I find out why saving doesn't work? All config files have the
same permissions.

Thanks,
Michael



* Here's how I use the lenses to edit entries:
>>> aug = augeas.Augeas()
>>> path = '/files/etc/pagekite.d/80_httpd.rc/service_on/1/source'
>>> aug.get(path)
'http:@kitename'
>>> aug.set(path, 'wontwork')
>>> aug.save()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/dist-packages/augeas.py", line 385, in save
    raise IOError("Unable to save to file!")
IOError: Unable to save to file!


Removing entries looks like:
>>> aug.match('/files/etc/pagekite.d/80_httpd.rc/service_on/1')
['/files/etc/pagekite.d/80_httpd.rc/service_on/1']
>>> aug.remove(path)
4
>>> aug.save()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/dist-packages/augeas.py", line 385, in save
    raise IOError("Unable to save to file!")
IOError: Unable to save to file!