Bash unix signals: Difference between revisions
From wikinotes
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<syntaxhighlight lang="bash"> | <syntaxhighlight lang="bash"> | ||
# Install callback for SIGINT and SIGTRAP | # Install callback for SIGINT and SIGTRAP | ||
on_signal() { | on_signal() { echo "received SIGINT or SIGTRAP!" } | ||
} | |||
trap on_signal SIGINT SIGTRAP | trap on_signal SIGINT SIGTRAP | ||
Revision as of 12:24, 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 SIGTRAP # Uninstall a trap trap - SIGINT SIGTRAP