Build

mkdir build
cd build
cmake ..
cmake --build .

Run

When starting, you must specify the directory and timeout. You can specify the directory either through the command line argument --dir or through the environment variable DAEMON_DIR. You can specify the timeout either through the command line argument --timeout or through the environment variable INTERRUPT_TIME. Also, through the command line argument inotify you can specify the mode - in the case when inotify is specified - integrity checking will occur during some inotify events, otherwise - according to a timeout and the USR1 signal.

Example:

./daemon --dir ./path/to/dir --timeout 100 --inotify

Stop daemon (only SIGTEM; SIGQUIT, SIGINT, SIGHUP, SIGSTOP, SIGCONT is ignoring):

killall -15 daemon

Test with pytest

From ./tests directory:

pytest --bin ../build/daemon .

Integrity check

In the current implementation, only regular files are monitored for integrity; directory files are not checked for integrity.

Inotify

In the inotify case, events are monitored for the creation, modification, deletion, and movement of files. Including the creation of a directory triggers integrity check.

It is worth noting that in the case of inotify, events from notify are not analyzed, the integrity check function is simply called.

Json dump

In the current implementation, with each integrity check, json is generated in /tmp/crc32_daemon/dump.json