56 lines
1.6 KiB
Bash
Executable File
56 lines
1.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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mod_bat () {
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# Customizable configuration constants
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local -r DEFAULT_CNT=1
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local -r DEFAULT_PRE_PLG=$'\u26A1 '
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local -r DEFAULT_PRE_UPLG=$'\u2755 '
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local -r DEFAULT_PRE_UNK='?? '
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local -r DEFAULT_SUF='%'
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local -r cnt="${1:-${DEFAULT_CNT}}"
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local -r pre_plg="${2-${DEFAULT_PRE_PLG}}"
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local -r pre_uplg="${3-${DEFAULT_PRE_UPLG}}"
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local -r pre_unk="${4-${DEFAULT_PRE_UNK}}"
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local -r suf="${5-${DEFAULT_SUF}}"
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local res cap_files cap_file cap stat_file stat
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# Get up to the specified number of battery capacity files
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readarray -d '' cap_files < \
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<(find /sys/class/power_supply/BAT?/capacity -type f -print0 \
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| head -z -n "${cnt}")
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# Get the corresponding status and capacity for each battery
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for cap_file in "${cap_files[@]}"; do
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# Compute the name of the status file
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printf -v stat_file '%s' "$(dirname "${cap_file}")/status";
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# Get the current battery status
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if [[ -r "${stat_file}" ]]; then
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read -r stat < "${stat_file}"
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case "${stat}" in
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Charging|Full)
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printf -v res '%b %b' "${res}" "${pre_plg}"
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;;
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Discharging)
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printf -v res '%b %b' "${res}" "${pre_uplg}"
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;;
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*)
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printf -v res '%b %b' "${res}" "${pre_unk}"
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;;
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esac
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else
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printf -v res '%b %b' "${res}" "${pre_unk}"
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fi
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# Get the current battery capacity
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read -r cap < "${cap_file}"
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printf -v res '%b%3d%b' "${res}" "${cap}" "${suf}"
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done
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# In res, info for each battery is separated by a space, including a
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# leading space before the first battery info, so remove it
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printf '%b' "${res:1}"
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}
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