yawn / sockwait

Wait for a number of hosts & exec() the next process

sockwait (sw)

sw will wait for a given number of hosts to be available for opening TCP connections and execs a passed binary (with optional arguments) if successful.

It waits a configurable amount of time (-sleep, defaults to 100ms) between attempts and will give up after a given amount of time (-timeout, defaults to 5s).

Example

sw www.google.de:80 172.16.0.1:1234 -- /my/fancy/app --port 23 --verbose

This will either

• return with 1 when neither www.google.de (on port 80) nor 172.16.0.1 (on port 1234) respond within 5s
• exec my fancy app with the flags --port 23 and --verbose.