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#!/bin/env bash
set -e
percent() {
local p=00$(($1 * 100000 / $2))
printf -v "$3" %.3f ${p::-3}.${p: -3}
}
percent "$1" 33000 refresh
if [ -n "$2" ]; then
pid=$(pgrep "$2")
fi
percentBar() {
local prct totlen=$((8 * $2)) lastchar barstring blankstring
printf -v prct %.2f "$1"
((prct = 10#${prct/./} * totlen / 10000, prct % 8)) &&
printf -v lastchar '\\U258%X' $((16 - prct % 8)) ||
lastchar=''
printf -v barstring '%*s' $((prct / 8)) ''
printf -v barstring '%b' "${barstring// /\\U2588}$lastchar"
printf -v blankstring '%*s' $(((totlen - prct) / 8)) ''
printf -v "$3" '%s%s' "$barstring" "$blankstring"
}
clear
for i in {0..10000..33} 10000; do
if [ -n "$2" ]; then
if [ ! -d "/proc/$pid" ]; then
percentBar 100 $((COLUMNS - 9)) bar
printf '\r|%s|%6.2f%%' "$bar" 100
exit 0
fi
fi
i=0$i
printf -v p %0.2f ${i::-2}.${i: -2}
percentBar $p $((COLUMNS - 9)) bar
printf '\r|%s|%6.2f%%' "$bar" $p
read -srt $refresh _ && break # console sleep avoiding fork
done
while true; do
if [ -n "$2" ]; then
if [ ! -d "/proc/$pid" ]; then
break
fi
fi
done
exit 0
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