01ee5fba93
By making the percent sign part of the suffix, it can be changed or entirely omitted by changing the suffix.
56 lines
1.6 KiB
Bash
Executable File
56 lines
1.6 KiB
Bash
Executable File
#!/bin/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=' '
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local -r DEFAULT_PRE_UPLG=' '
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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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