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tldr/pages/common/trap.md
Alejandro Cervera ced5cb22f6
common/*: update pages of POSIX special Built-In utilities (#11858) 
* eval, exec, exit, export, readonly, set, shift, trap: use Open Group links

* exec, export, trap: split Linux and POSIX
2023-12-29 18:37:58 +05:30

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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. More information: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#trap.

  • List active traps for the current shell:

trap

  • 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}}