Bash unix signals: Difference between revisions
From wikinotes
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= Callback on Signal = | = Callback on Signal = | ||
<blockquote> | <blockquote> | ||
Install callback for SIGINT and SIGTRAP | |||
<syntaxhighlight lang="bash"> | |||
on_signal() { | |||
echo "received SIGINT or SIGTRAP!" | |||
} | |||
trap on_signal SIGINT SIGTRAP | |||
</syntaxhighlight> | |||
Uninstall a trap | |||
<syntaxhighlight lang="bash"> | |||
</syntaxhighlight> | |||
</blockquote><!-- Callback on Signal --> | </blockquote><!-- Callback on Signal --> |
Revision as of 12:20, 17 July 2021
Documentation
man 7 signal
https://man.archlinux.org/man/core/man-pages/signal.7.en wikipedia: unix signals https://en.wikipedia.org/wiki/Signal_(IPC)#POSIX_signals
Send Signal
kill -l # list all signals kill -9 ${PID} # send signal 9 (SIGKILL) kill -SIGINT ${PID} # send isgnal 2 (SIGINT)
Callback on Signal
Install callback for SIGINT and SIGTRAP
on_signal() { echo "received SIGINT or SIGTRAP!" } trap on_signal SIGINT SIGTRAPUninstall a trap