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I have a script for launchd to run that starts a server, then tells it to exit gracefully when launchd kills it off (which should be at shutdown). My question: what is the appropriate, idiomatic way to tell the script to idle until it gets the signal? Should I just use a while-true-sleep-1 loop, or is there a better way to do this?
#!/bin/bash
cd "`dirname "$0"`"
trap "./serverctl stop" TERM
./serverctl start
# wait to receive TERM signal.
A plain
waitwould be significantly less resource-intensive than a spin lock, even with a sleep in it.