48 lines
820 B
Bash
Executable File
48 lines
820 B
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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# Ensure in a interactive terminal
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[ ! -t 0 ] && exit 1
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# Construct query
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QUERY_CODE=$(printf "\033[c")
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# Set terminal to raw mode with timeout as 0.5s
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stty_orig=$(stty -g < /dev/tty)
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trap 'stty "$stty_orig" < /dev/tty' EXIT INT TERM HUP
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stty -echo -icanon min 1 time 0
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printf "%s" "$QUERY_CODE" >/dev/tty
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response=""
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while true; do
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IFS= read -r -N 1 -t 0.3 char < /dev/tty || {
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[ -z "$char" ] && break
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}
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response+="$char"
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if [[ "$char" = "c" ]]; then
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break
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fi
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if [ ${#response} -gt 1024 ]; then
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break
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fi
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done
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if [[ "$response" =~ $'\x1b'\[\?([0-9;]*)c ]]; then
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params="${BASH_REMATCH[1]}"
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IFS=';' read -ra codes <<< "$params"
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for code in "${codes[@]}"; do
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if [[ "$code" == "4" ]]; then
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exit 0
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fi
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done
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fi
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exit 1
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