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A tool to detect crontab errors

Project description

Build status

Crontab linter

chkcrontab is a script to check crontab files like those in /etc/cron.d and /etc/crontab. It tries to catch glaring errors and warn on suspect lines in a crontab file. Some valid lines will generate warnings. Certain silly yet valid crontab lines will generate errors as well.

Run this by doing:

chkcrontab crontab_file

Errors will cause a non-zero exit code. Warnings alone will not.

To see sample output for a bad crontab, run the following:

./chkcrontab ./tests/test_crontab

See the ./tests/test_crontab.disable crontab for how to disable warnings and errors.

Contributions

Contributions are welcome! Please add unit tests for new features or bug fixes. To run all the unit tests run ./setup test. If you have tox installed, just run tox.

Note that tests are run on Travis for all supported python versions whenever the tree on github is pushed to.

The main site for this is on code.google.com with a backup site at github. Use whichever is convenient, the maintainer will push accepted patches to both.

TODO

  • Look for duplicate entries. Puppet sometimes loads up crontabs with dups.
  • Check for backticks. (why?)
  • Make sure MAILTO and PATH are set (perhaps others?)

Credits

  • Kevin Lyda: Who got burned one too many times by broken crontabs.

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