Bash unix signals
From wikinotes
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
Signal Keybindings
List signal keybindings
stty -a | tr ';' '\n' # intr = ^C # quit = ^\ # erase = ^? # ...
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 SIGTRAPYou can also trap on any process error (and implement behaviour similar to
set -e
)on_error() { echo "There was an error on line $LINENO" exit 1 } trap on_error ERR