42 lines
828 B
Plaintext
42 lines
828 B
Plaintext
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#!/bin/bash
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cache_vals(){
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echo "$1" > "$3"
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echo -n "$2" >> "$3"
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}
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cached_eval(){
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local dir
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local a0
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local t0
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local a1
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local t1
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dir="/tmp/tmux_cpu_perc"
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a1="$1"
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t1="$2"
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if [ -f "$dir" ]; then
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a0="$(head -n1 "$dir")"
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t0="$(tail -n+2 "$dir")"
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cache_vals "$a1" "$t1" "$dir"
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awk -v a1="$a1" \
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-v t1="$t1" \
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-v a0="$a0" \
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-v t0="$t0" \
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'BEGIN {print 100*(a1-a0)/(t1-t0)}'
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else
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cache_vals "$a1" "$t1" "$dir"
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echo -n 0
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fi
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}
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get_cpu(){
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grep 'cpu ' /proc/stat | \
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awk '{a=($2+$4)}; {t=($2+$4+$5)} END {printf("%s %s", a, t)}'
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}
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cpu_percentage_format="%.2f%%"
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cached_eval $(get_cpu) \
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| awk -v f="$cpu_percentage_format" \
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'{usage=$NF} END {printf(f, usage)}'
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