29 lines
687 B
Bash
Executable File
29 lines
687 B
Bash
Executable File
#!/usr/bin/env bash
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function get_time_ms {
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date -u +%s%3N
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}
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icons=("" "" "")
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gen_output() {
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icon="${icons[$(awk -v n="$(light)" 'BEGIN{print int(n/34)}')]}"
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echo '{"percent": "'$(light)'", "icon": "'$icon'"}'
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}
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if [[ $(light 2>/dev/stdout 1>/dev/null | head -n1 | awk '{print $1}') == "No" ]]; then
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echo '{"percent": 100.0, "icon": ""}'
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elif [ "$1" = "" ]; then
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# initial
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last_time=$(get_time_ms)
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gen_output
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udevadm monitor | rg --line-buffered "backlight" | while read -r _; do
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current_time=$(get_time_ms)
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delta=$((current_time - last_time))
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if [[ $delta -gt 50 ]]; then
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gen_output
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last_time=$(get_time_ms)
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fi
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done
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fi |