Feat: Daemon
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Narvin Singh
parent
08dc3a58d3
commit
8471ea66c0
146
status-bar
146
status-bar
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#!/bin/bash
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# Configurable variables
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SEP=' | '
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CPU_ON=1
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CPU_SYM=
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MEM_ON=1
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MEM_SYM=
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BL_ON=1
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BL_SYM=
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VOL_ON=1
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VOL_SYM_LOW=
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VOL_SYM_HI=
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VOL_SYM_MUTE=
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BAT_ON=1
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BAT_SYM=
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BAT_SYM_PLG=
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BAT_SYM_UNK=
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BAT_CNT=1
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DT_ON=1
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DT_SYM=''
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DT_FMT='%a %d %I:%M%p'
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status_cpu() {
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ps --no-headers -eo %cpu | awk '{cpu = cpu + $1} END {print cpu}'
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}
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status_mem() {
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printf '%.0f%%' "$(free | awk 'NR == 2 {print $3 * 100 / $2}')"
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}
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status_bl () {
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local bl
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local max_bl
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printf -v bl '%s' \
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"$(find /sys/class/backlight/*/brightness | head -n 1 | xargs cat)"
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printf -v max_bl '%s' \
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"$(find /sys/class/backlight/*/max_brightness | head -n 1 | xargs cat)"
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# Multiply by 10^3 inside the arithemetic expansion so the integer arithmetic
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# will preserve 3 digits after the decimal point. Applying e-3 would provide
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# 3 decimal points for printf, but since we want the result scaled by 100, we
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# only apply e-1. printf will round the result to the specified presion.
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printf '%.0f%%' "$((bl * 1000 / max_bl))e-1"
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}
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status_vol () {
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printf '%s%%' \
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"$(amixer get Master | tail -n 1 | sed -E 's/.*\[(.*)%\].*/\1/')"
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}
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status_vol_state() {
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local -r vol="${1:-0}"
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local state
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printf -v state '%s' \
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"$(amixer get Master | tail -n 1 | sed -E 's/.*\[(.*)\]/\1/')"
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case "${state}" in
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on)
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if [[ "${vol}" -lt 50 ]]; then printf '%s' "${VOL_SYM_LOW}";
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else printf '%s' "${VOL_SYM_HI}"; fi
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;;
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*)
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printf '%s' "${VOL_SYM_MUTE}"
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;;
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esac
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}
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status_bat_cap () {
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printf '%s' "$(find /sys/class/power_supply/BAT?/capacity \
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| head -n "${BAT_CNT}" | xargs cat | tr '\n' '% ' | sed 's/ *$//')"
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}
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status_bat_state() {
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local state
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printf -v state '%s' \
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"$(find /sys/class/power_supply/BAT?/status | head -n 1 | xargs cat)"
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case "${state}" in
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Discharging)
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printf '%s' "${BAT_SYM}"
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;;
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Charging|Full)
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printf '%s' "${BAT_SYM_PLG}"
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;;
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*)
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printf '%s' "${BAT_SYM_UNK}"
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;;
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esac
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}
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status_dt () {
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printf '%s' "$(date +"${DT_FMT}")"
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}
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add_stat () {
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local -r val="$1"
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local -r sym="$2"
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local sep
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# Skip the separator for the first status section
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if [[ -n "${status}" ]]; then sep="${SEP}"; fi
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# Only output the status section if it has a value
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if [[ -n "${val}" ]]; then
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if [[ -n "${sym}" ]]; then status="${status}${sep}${sym} ${val}";
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else status="${status}${sep}${val}"; fi
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fi
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}
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while :; do
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status=''
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if [[ "${CPU_ON}" -ne 0 ]]; then
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add_stat "$(status_cpu)" "${CPU_SYM}"
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fi
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if [[ "${MEM_ON}" -ne 0 ]]; then
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add_stat "$(status_mem)" "${MEM_SYM}"
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fi
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if [[ "${BL_ON}" -ne 0 ]]; then
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add_stat "$(status_bl)" "${BL_SYM}"
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fi
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if [[ "${VOL_ON}" -ne 0 ]]; then
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vol="$(status_vol)"
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add_stat "${vol}" "$(status_vol_state "${vol:0:-1}")"
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fi
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if [[ "${BAT_ON}" -ne 0 ]]; then
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add_stat "$(status_bat_cap)" "$(status_bat_state)"
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fi
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if [[ "${DT_ON}" -ne 0 ]]; then
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add_stat "$(status_dt)" "${DT_SYM}"
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fi
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xsetroot -name " ${status} "
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# Sleep until the beginning of the next minute, this way when we are showing
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# the time, the status updates on the minute
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## sleep $((60 - $(date +%S)))
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sleep 2
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done
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96
xrsbd
Executable file
96
xrsbd
Executable file
@ -0,0 +1,96 @@
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#!/bin/bash
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# Global readonly variables can't be shadowed by local variables so wrap
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# our code in a function so we can declare all variables local
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main() {
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# Customizable configuration constants
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local -r DEFAULT_RES=.25
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local -r DEFAULT_MOD_LIST='cpu mem bl vol-amixer bat dt'
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local -r DEFAULT_PRE=' '
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local -r DEFAULT_SEP_L='| '
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local -r DEFAULT_SEP_R=' '
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local -r DEFAULT_SUF=' '
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local -r res="${1-${DEFAULT_RES}}"
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local -r mod_list="${2-${DEFAULT_MOD_LIST}}"
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local -r pre="${3-${DEFAULT_PRE}}"
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local -r sep_l="${4-${DEFAULT_SEP_L}}"
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local -r sep_r="${5-${DEFAULT_SEP_R}}"
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local -r suf="${6-${DEFAULT_SUF}}"
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local -r MOD_DIR="$(dirname "$0")"/module
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local -r ACTION_DIR=/tmp/xrsb-action
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local -i ACTION_DIR_LEN=${#ACTION_DIR}
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# Cache module values so we can reuse them without recomputing them
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local -A stat_cache
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# Since stat_cache is hash ordered, maintain the display order of cache keys
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# so we can loop over the cache in display order to generate the full status
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local -a stat_ordered_keys
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local mod mod_file key
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# Process the module list
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for mod in ${mod_list}; do
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# Check if the module file exists
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mod_file="${MOD_DIR}/${mod}"
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if [[ -r "${mod_file}" ]]; then
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# Source the module, compute its key and add it to the ordered array,
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# and call the module function and store the value in the cache
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source "${mod_file}"
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key="${mod//-/_}"
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stat_ordered_keys+=("${key}")
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stat_cache["${key}"]="$("mod_${key}")"
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fi
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done
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draw_status() {
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local stat
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# Construct the status by looping over the cached values in display order
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for key in "${stat_ordered_keys[@]}"; do
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printf -v stat '%b%b%b%b' \
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"${stat}" "${sep_l}" "${stat_cache[${key}]}" "${sep_r}"
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done
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# Trim the leading left separator and trailing right separator, and
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# display the status
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local -ri offset=${#sep_l}
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local -ri len=$((${#stat} - offset - ${#sep_r}))
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xsetroot -name "${pre}${stat:${offset}:${len}}${suf}"
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}
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# Draw the initial status
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draw_status
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process_signal () {
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local -a actions
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local path do_redraw
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# Get the actions and purge the action directory
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readarray -d '' actions < \
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<(find "${ACTION_DIR}" -maxdepth 1 -type f -exec rm -f {} + -print0)
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# Process each action
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for path in "${actions[@]}"; do
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key="${path:$((ACTION_DIR_LEN + 1))}"
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# Call the module function if cache entry for the module is defined
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if [[ -v stat_cache[${key}] ]]; then
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stat_cache["${key}"]="$("mod_${key}")"
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do_redraw=1
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fi
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done
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if [[ -v do_redraw ]]; then draw_status; fi
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}
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# Wait for signals
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mkdir -p "${ACTION_DIR}"
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trap process_signal SIGUSR1
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while :; do
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sleep "${res}"
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done
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}
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main "$@"
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