Created
August 26, 2025 08:43
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Example Bash Monitoring of `showkey` Utility
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| #!/bin/bash | |
| STOP=0 | |
| trap 'echo "Caught Ctrl+C, cleaning up..."; STOP=1; cleanup; exit 0' SIGINT | |
| cleanup() { | |
| sudo pkill -f "showkey" 2>/dev/null | |
| sudo pkill -f "script.*showkey" 2>/dev/null | |
| pkill -P $$ 2>/dev/null | |
| [[ -n $COPROC_PID ]] && kill $COPROC_PID 2>/dev/null | |
| } | |
| while [ $STOP -eq 0 ]; do | |
| echo "Starting showkey monitoring..." | |
| # Start coprocess | |
| coproc sudo script -q -c "showkey" /dev/null 2>&1 | |
| while [ $STOP -eq 0 ] && kill -0 $COPROC_PID 2>/dev/null; do | |
| if read -r -t 0.1 line <&${COPROC[0]} 2>/dev/null; then | |
| echo "$line" | |
| if [[ $line =~ keycode[[:space:]]+([0-9]+)[[:space:]]+(press|release) ]]; then | |
| keycode="${BASH_REMATCH[1]}" | |
| action="${BASH_REMATCH[2]}" | |
| echo "Keycode: $keycode, Action: $action" | |
| if [[ $keycode -eq 30 && $action == "press" ]]; then | |
| echo "Pressed A!" | |
| fi | |
| fi | |
| fi | |
| done | |
| cleanup | |
| if [ $STOP -eq 0 ]; then | |
| echo "showkey exited, restarting..." | |
| sleep 1 | |
| fi | |
| done | |
| echo "Exited cleanly." | |
| fi | |
| done | |
| echo "Exited cleanly." | |
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