tldr/pages/osx/trap.md

trap

Automatically execute commands after receiving signals by processes or the operating system. Can be used to perform cleanups for interruptions by the user or other actions.

• List available signals to set traps for:

trap -l

• List active traps for the current shell:

trap -p

• Set a trap to execute commands when one or more signals are detected:

trap 'echo "Caught signal {{SIGHUP}}"' {{SIGHUP}}

• Remove active traps:

trap - {{SIGHUP}} {{SIGINT}}