Trigger daemon (TRD) watching the file updates, and if the file changed automatically run commands.
Modern and fancy Control-M for automatic jobs/commands triggering if some files get changed.
Useful tool for automatic tasking and low port permissions opening in linux systems, restarting services automatically and unpacking packages.
setcap CAP_NET_BIND_SERVICE=+eip file_name
file_name restart
This daemon could be run in root, especially for setcap command.
The special string %1 is using in command line expression and would be replaced by the actual watching file.
In order to start daemon you need to run:
./trd -c "echo %1" -c "echo %1" watch_file_path
If you want to run daemon in foreground mode, then include option -f
./trd -f -c "echo %1" watch_file_path
In order to verbose all events incluse option -v
./trd -v -f -c "echo %1" watch_file_path
Example of unpacking executable under user permissions:
./trd -c "gzip -d -f %1" /my/path/distr.gz
Example of setcap and restart under root permissions:
sudo ./trd -c "setcap CAP_NET_BIND_SERVICE=+eip %1" -c "%1 restart" /my/path/service_linux
Commands would be executed in the same sequence as in command line.