automaticly sends SIGHUP to a process when a file changes. This is handy for containers that need to reload configuration as they change.
usage: ./autohup [-s signal] [-e script] [-v] [path ...] -- command [argument ...]
./autohup -l
autohup always returns 255 if an error occurs internally. If the program
defined with command exits, its error code is used.
This example watches for changes in /etc/daemon.d and sends SIGHUP when
inotify registers a change in that directory.
$ autohup /etc/daemon.d -- daemon
The second example watches multiple directories and sends SIGTERM instead.
Beware that the SIG... prefix is optional and the option is case insensite.
$ autohup -s term /etc/daemon.d /var/lib/daemon -- daemon
Optionally an event script can be defined, that runs right before a signal is sent
$ autohup -e 'cat /etc/daemon.d/* > /etc/daemon.conf' /etc/daemon.d -- daemon
To list all signals autohup can send use this command:
$ autohup -l
Signals can also be defined as numbers
$ autohup -s 10 /etc/daemon.d -- daemon # 10 = SIGUSR2
autohup has a debouncing mechanism which sends the signal after 1 second with
no file change. This means that if you're constantly changing files, the signal
will never be sent.