# processbar <current> <total>
processbar() {
  local current=$1; local total=$2;
  local maxlen=80; local barlen=66; local perclen=14;
  local format="%-${barlen}s%$((maxlen-barlen))s"
  local perc="[$current/$total]"
  local progress=$((current*barlen/total))
  local prog=$(for i in `seq 0 $progress`; do printf '#'; done)
  printf "\r\n$3\r\n$format" $prog $perc
}
 
# Usage(Client)
for i in `seq 1 10`; do
  processbar $i 10 test
  sleep 1
done

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原文链接：https://blog.csdn.net/wxqee/article/details/38332141