32 lines
682 B
Bash
Executable File
32 lines
682 B
Bash
Executable File
#!/bin/sh
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set -e
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POLLING_FREQUENCY=1
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alias date='printf "[%s] " "$(date +%Y-%m-%dT%T)"' # ISO 8601
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! battery >/dev/null 2>&1 \
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&& ! printf "%s: Unable to get battery status on this system.\n" "$0" \
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1>&2
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current_level="$(battery)"
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previous_level="$current_level"
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date; printf "Current level: %d%%\n" "$current_level"
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while true; do
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current_level="$(battery)"
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date; if ! strcmp "$current_level" "$previous_level"; then
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printf '%s: %s%% -> %s%%\n' "$(
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test "$current_level" -lt "$previous_level" \
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&& printf 'Discharged' \
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|| printf ' Charged')" \
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"$previous_level" "$current_level"
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previous_level=$current_level
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fi
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sleep "$POLLING_FREQUENCY"
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done
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