对我来说，到目前为止最容易使用和最好看的是命令pv或bar，就像某人已经写的那样

例如:需要用dd备份整个驱动器

通常你使用dd if="$input_drive_path" of="$output_file_path"

对于pv，你可以这样做:

如果dd = input_drive_path美元“硒| | dd =“output_file_path美元”

进程直接进入STDOUT，如下所示:

    7.46GB 0:33:40 [3.78MB/s] [  <=>                                            ]

做完之后，总结就出来了

    15654912+0 records in
    15654912+0 records out
    8015314944 bytes (8.0 GB) copied, 2020.49 s, 4.0 MB/s

根据上面列出的建议，我决定实现自己的进度条。

#!/usr/bin/env bash

main() {
  for (( i = 0; i <= 100; i=$i + 1)); do
    progress_bar "$i"
    sleep 0.1;
  done
  progress_bar "done"
  exit 0
}

progress_bar() {
  if [ "$1" == "done" ]; then
    spinner="X"
    percent_done="100"
    progress_message="Done!"
    new_line="\n"
  else
    spinner='/-\|'
    percent_done="${1:-0}"
    progress_message="$percent_done %"
  fi

  percent_none="$(( 100 - $percent_done ))"
  [ "$percent_done" -gt 0 ] && local done_bar="$(printf '#%.0s' $(seq -s ' ' 1 $percent_done))"
  [ "$percent_none" -gt 0 ] && local none_bar="$(printf '~%.0s' $(seq -s ' ' 1 $percent_none))"

  # print the progress bar to the screen
  printf "\r Progress: [%s%s] %s %s${new_line}" \
    "$done_bar" \
    "$none_bar" \
    "${spinner:x++%${#spinner}:1}" \
    "$progress_message"
}

main "$@"

基于Edouard Lopez的工作，我创建了一个适合屏幕大小的进度条。来看看。

它也发布在Git Hub上。

#!/bin/bash
#
# Progress bar by Adriano Pinaffo
# Available at https://github.com/adriano-pinaffo/progressbar.sh
# Inspired on work by Edouard Lopez (https://github.com/edouard-lopez/progress-bar.sh)
# Version 1.0
# Date April, 28th 2017

function error {
  echo "Usage: $0 [SECONDS]"
  case $1 in
    1) echo "Pass one argument only"
    exit 1
    ;;
    2) echo "Parameter must be a number"
    exit 2
    ;;
    *) echo "Unknown error"
    exit 999
  esac
}

[[ $# -ne 1 ]] && error 1
[[ $1 =~ ^[0-9]+$ ]] || error 2

duration=${1}
barsize=$((`tput cols` - 7))
unity=$(($barsize / $duration))
increment=$(($barsize%$duration))
skip=$(($duration/($duration-$increment)))
curr_bar=0
prev_bar=
for (( elapsed=1; elapsed<=$duration; elapsed++ ))
do
  # Elapsed
prev_bar=$curr_bar
  let curr_bar+=$unity
  [[ $increment -eq 0 ]] || {  
    [[ $skip -eq 1 ]] &&
      { [[ $(($elapsed%($duration/$increment))) -eq 0 ]] && let curr_bar++; } ||
    { [[ $(($elapsed%$skip)) -ne 0 ]] && let curr_bar++; }
  }
  [[ $elapsed -eq 1 && $increment -eq 1 && $skip -ne 1 ]] && let curr_bar++
  [[ $(($barsize-$curr_bar)) -eq 1 ]] && let curr_bar++
  [[ $curr_bar -lt $barsize ]] || curr_bar=$barsize
  for (( filled=0; filled<=$curr_bar; filled++ )); do
    printf "▇"
  done

  # Remaining
  for (( remain=$curr_bar; remain<$barsize; remain++ )); do
    printf " "
  done

  # Percentage
  printf "| %s%%" $(( ($elapsed*100)/$duration))

  # Return
  sleep 1
  printf "\r"
done
printf "\n"
exit 0

享受

这是它看起来的样子

上传文件

[##################################################] 100% (137921 / 137921 bytes)

等待一项工作完成

[#########################                         ] 50% (15 / 30 seconds)

实现它的简单函数

你可以复制粘贴到你的脚本。它不需要任何其他东西来工作。

PROGRESS_BAR_WIDTH=50  # progress bar length in characters

draw_progress_bar() {
  # Arguments: current value, max value, unit of measurement (optional)
  local __value=$1
  local __max=$2
  local __unit=${3:-""}  # if unit is not supplied, do not display it

  # Calculate percentage
  if (( $__max < 1 )); then __max=1; fi  # anti zero division protection
  local __percentage=$(( 100 - ($__max*100 - $__value*100) / $__max ))

  # Rescale the bar according to the progress bar width
  local __num_bar=$(( $__percentage * $PROGRESS_BAR_WIDTH / 100 ))

  # Draw progress bar
  printf "["
  for b in $(seq 1 $__num_bar); do printf "#"; done
  for s in $(seq 1 $(( $PROGRESS_BAR_WIDTH - $__num_bar ))); do printf " "; done
  printf "] $__percentage%% ($__value / $__max $__unit)\r"
}

使用的例子

在这里，我们上传一个文件，并在每次迭代时重新绘制进度条。只要我们能得到两个值:最大值和当前值，实际执行的作业是什么并不重要。

在下面的例子中，最大值是file_size，当前值由某个名为uploaded_bytes的函数提供。

# Uploading a file
file_size=137921

while true; do
  # Get current value of uploaded bytes
  uploaded_bytes=$(some_function_that_reports_progress)

  # Draw a progress bar
  draw_progress_bar $uploaded_bytes $file_size "bytes"

  # Check if we reached 100%
  if [ $uploaded_bytes == $file_size ]; then break; fi
  sleep 1  # Wait before redrawing
done
# Go to the newline at the end of upload
printf "\n"

对我来说，到目前为止最容易使用和最好看的是命令pv或bar，就像某人已经写的那样

例如:需要用dd备份整个驱动器

通常你使用dd if="$input_drive_path" of="$output_file_path"

对于pv，你可以这样做:

如果dd = input_drive_path美元“硒| | dd =“output_file_path美元”

进程直接进入STDOUT，如下所示:

    7.46GB 0:33:40 [3.78MB/s] [  <=>                                            ]

做完之后，总结就出来了

    15654912+0 records in
    15654912+0 records out
    8015314944 bytes (8.0 GB) copied, 2020.49 s, 4.0 MB/s

https://github.com/extensionsapp/progre.sh

创造40%的进度:progress 40