It's an old junk, which I wrote to learn more about C. Maybe it still can be
interesting for someone.

Little description:
-------------------
Keep file permissions from configuration file. Run systematically from cron.

Example of configuration file:
# --------------------+---------------+------+-------+
# filename            | user:group    | mode | flags |
# --------------------+---------------+------+-------+
/                       root:root       0755
/bin                    root:root       0755
/bin/*                  root:root       0755
/bin/bash               root:root       0755    f
/boot                   root:root       0750

More inside.

Link:
http://urug.net/sources/apguard.tar.gz