2018-02-02 21:39:19 +00:00
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# trap
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> Automatically execute commands after receiving signals by processes or the operating system.
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2018-02-03 12:12:32 +00:00
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> Can be used to perform cleanups for interruptions by the user or other actions.
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2018-02-02 21:39:19 +00:00
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- List available signals to set traps for:
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`trap -l`
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- List active traps for the current shell:
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`trap -p`
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- Set a trap to execute commands when one or more signals are detected:
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2018-02-03 12:12:32 +00:00
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`trap 'echo "Caught signal SIGHUP"' SIGHUP`
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2018-02-02 21:39:19 +00:00
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- Remove active traps:
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2018-02-03 12:12:32 +00:00
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`trap - SIGHUP SIGINT`
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2018-02-02 21:39:19 +00:00
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- Set a trap to delete a file after the user has interrupted a download:
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`trap 'rm -i master.zip' SIGINT ERR`
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