# Hidasta
A simple cross-process signalling mechanism for shell scripts.
**This is not an officially supported Google product**
## Why?
Sometimes you need multiple shell script processes to wait for an event.
## How?
To wait:
`hidasta -w $socket_path`, called from any number of processes, will block until signalled.
To signal:
`hidasta -s $socket_path` just once. All instances currently waiting on the socket path will return, and the callers can continue.
## Where?
`$socket_path` is the path at which a new Unix Domain Socket will be created (and removed once signalled). Only works on Unix, but can use filesystem permissions to restrict who can signal or wait.