My solution displays the percentage of the tarball that is currently being uncompressed and written. I use this when writing out 2GB root filesystem images. You really need a progress bar for these things. What I do is use gzip --list to get the total uncompressed size of the tarball. From that I calculate the blocking-factor needed to divide the file into 100 parts. Finally, I print a checkpoint message for each block. For a 2GB file this gives about 10MB a block. If that is too big then you can divide the BLOCKING_FACTOR by 10 or 100, but then it's harder to print pretty output in terms of a percentage.

假设您正在使用Bash，那么您可以使用 shell函数

untar_progress () 
{ 
  TARBALL=$1
  BLOCKING_FACTOR=$(gzip --list ${TARBALL} |
    perl -MPOSIX -ane '$.==2 && print ceil $F[1]/50688')
  tar --blocking-factor=${BLOCKING_FACTOR} --checkpoint=1 \
    --checkpoint-action='ttyout=Wrote %u%  \r' -zxf ${TARBALL}
}

APT风格的进度条(不中断正常输出)

编辑:更新版本检查我的github页面

我对这个问题的回答不满意。我个人想要的是一个花哨的进度条，就像APT看到的那样。

我查看了APT的C源代码，并决定为bash编写自己的等效代码。

这个进度条将很好地停留在终端的底部，不会干扰发送到终端的任何输出。

请注意，该栏目前固定在100字符宽。如果你想把它缩放到终端的大小，这也很容易实现(我的github页面上的更新版本处理得很好)。

我将在这里发布我的脚本。 使用的例子:

source ./progress_bar.sh
echo "This is some output"
setup_scroll_area
sleep 1
echo "This is some output 2"
draw_progress_bar 10
sleep 1
echo "This is some output 3"
draw_progress_bar 50
sleep 1
echo "This is some output 4"
draw_progress_bar 90
sleep 1
echo "This is some output 5"
destroy_scroll_area

脚本(我强烈推荐我的github上的版本):

#!/bin/bash

# This code was inspired by the open source C code of the APT progress bar
# http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/trusty/apt/trusty/view/head:/apt-pkg/install-progress.cc#L233

#
# Usage:
# Source this script
# setup_scroll_area
# draw_progress_bar 10
# draw_progress_bar 90
# destroy_scroll_area
#


CODE_SAVE_CURSOR="\033[s"
CODE_RESTORE_CURSOR="\033[u"
CODE_CURSOR_IN_SCROLL_AREA="\033[1A"
COLOR_FG="\e[30m"
COLOR_BG="\e[42m"
RESTORE_FG="\e[39m"
RESTORE_BG="\e[49m"

function setup_scroll_area() {
    lines=$(tput lines)
    let lines=$lines-1
    # Scroll down a bit to avoid visual glitch when the screen area shrinks by one row
    echo -en "\n"

    # Save cursor
    echo -en "$CODE_SAVE_CURSOR"
    # Set scroll region (this will place the cursor in the top left)
    echo -en "\033[0;${lines}r"

    # Restore cursor but ensure its inside the scrolling area
    echo -en "$CODE_RESTORE_CURSOR"
    echo -en "$CODE_CURSOR_IN_SCROLL_AREA"

    # Start empty progress bar
    draw_progress_bar 0
}

function destroy_scroll_area() {
    lines=$(tput lines)
    # Save cursor
    echo -en "$CODE_SAVE_CURSOR"
    # Set scroll region (this will place the cursor in the top left)
    echo -en "\033[0;${lines}r"

    # Restore cursor but ensure its inside the scrolling area
    echo -en "$CODE_RESTORE_CURSOR"
    echo -en "$CODE_CURSOR_IN_SCROLL_AREA"

    # We are done so clear the scroll bar
    clear_progress_bar

    # Scroll down a bit to avoid visual glitch when the screen area grows by one row
    echo -en "\n\n"
}

function draw_progress_bar() {
    percentage=$1
    lines=$(tput lines)
    let lines=$lines
    # Save cursor
    echo -en "$CODE_SAVE_CURSOR"

    # Move cursor position to last row
    echo -en "\033[${lines};0f"

    # Clear progress bar
    tput el

    # Draw progress bar
    print_bar_text $percentage

    # Restore cursor position
    echo -en "$CODE_RESTORE_CURSOR"
}

function clear_progress_bar() {
    lines=$(tput lines)
    let lines=$lines
    # Save cursor
    echo -en "$CODE_SAVE_CURSOR"

    # Move cursor position to last row
    echo -en "\033[${lines};0f"

    # clear progress bar
    tput el

    # Restore cursor position
    echo -en "$CODE_RESTORE_CURSOR"
}

function print_bar_text() {
    local percentage=$1

    # Prepare progress bar
    let remainder=100-$percentage
    progress_bar=$(echo -ne "["; echo -en "${COLOR_FG}${COLOR_BG}"; printf_new "#" $percentage; echo -en "${RESTORE_FG}${RESTORE_BG}"; printf_new "." $remainder; echo -ne "]");

    # Print progress bar
    if [ $1 -gt 99 ]
    then
        echo -ne "${progress_bar}"
    else
        echo -ne "${progress_bar}"
    fi
}

printf_new() {
    str=$1
    num=$2
    v=$(printf "%-${num}s" "$str")
    echo -ne "${v// /$str}"
}

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 "$@"

GNU tar有一个有用的选项，它提供了一个简单的进度条功能。

(…)另一个可用的检查点操作是' dot '(或' . ')。它指示tar在标准列表流上打印单个点，例如:

$ tar -c --checkpoint=1000 --checkpoint-action=dot /var
...

同样的效果可以通过:

$ tar -c --checkpoint=.1000 /var

我需要一个进度条来迭代csv文件中的行。能够将cprn的代码改编成对我有用的东西:

BAR='##############################'
FILL='------------------------------'
totalLines=$(wc -l $file | awk '{print $1}')  # num. lines in file
barLen=30

# --- iterate over lines in csv file ---
count=0
while IFS=, read -r _ col1 col2 col3; do
    # update progress bar
    count=$(($count + 1))
    percent=$((($count * 100 / $totalLines * 100) / 100))
    i=$(($percent * $barLen / 100))
    echo -ne "\r[${BAR:0:$i}${FILL:$i:barLen}] $count/$totalLines ($percent%)"

    # other stuff
    (...)
done <$file

看起来是这样的:

[##----------------------------] 17128/218210 (7%)

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