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

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}
}

使用Linux命令pv。

如果它在管道中间，它不知道大小，但它给出了速度和总数，从那里你可以计算出它需要多长时间，并得到反馈，这样你就知道它没有挂起。

我使用了一个答案，从创建重复字符字符串在shell脚本字符重复。我有两个相对较小的bash版本，用于需要显示进度条的脚本(例如，一个遍历许多文件的循环，但对大的tar文件或复制操作没有用处)。较快的一个由两个函数组成，一个是为条形显示准备字符串:

preparebar() {
# $1 - bar length
# $2 - bar char
    barlen=$1
    barspaces=$(printf "%*s" "$1")
    barchars=$(printf "%*s" "$1" | tr ' ' "$2")
}

一个用来显示进度条:

progressbar() {
# $1 - number (-1 for clearing the bar)
# $2 - max number
    if [ $1 -eq -1 ]; then
        printf "\r  $barspaces\r"
    else
        barch=$(($1*barlen/$2))
        barsp=$((barlen-barch))
        printf "\r[%.${barch}s%.${barsp}s]\r" "$barchars" "$barspaces"
    fi
}

它可以被用作:

preparebar 50 "#"

这意味着为bar准备50个“#”字符的字符串，在那之后:

progressbar 35 80

将显示“#”字符的数量，对应35/80的比例:

[#####################                             ]

请注意，该函数在同一行上反复显示条，直到您(或其他程序)打印换行符。如果你把-1作为第一个参数，条形图将被删除:

progressbar -1 80

较慢的版本都在一个函数中:

progressbar() {
# $1 - number
# $2 - max number
# $3 - number of '#' characters
    if [ $1 -eq -1 ]; then
        printf "\r  %*s\r" "$3"
    else
        i=$(($1*$3/$2))
        j=$(($3-i))
        printf "\r[%*s" "$i" | tr ' ' '#'
        printf "%*s]\r" "$j"
    fi
}

它可以被用作(和上面的例子一样):

progressbar 35 80 50

如果你需要stderr上的进度条，只需在每个printf命令的末尾添加>&2。

有一次，我也有一个繁忙的脚本，它被占用了几个小时，没有任何进展。所以我实现了一个函数，主要包括前面的回答技巧:

#!/bin/bash
# Updates the progress bar
# Parameters: 1. Percentage value
update_progress_bar()
{
  if [ $# -eq 1 ];
  then
    if [[ $1 == [0-9]* ]];
    then
      if [ $1 -ge 0 ];
      then
        if [ $1 -le 100 ];
        then
          local val=$1
          local max=100

          echo -n "["

          for j in $(seq $max);
          do
            if [ $j -lt $val ];
            then
              echo -n "="
            else
              if [ $j -eq $max ];
              then
                echo -n "]"
              else
                echo -n "."
              fi
            fi
          done

          echo -ne " "$val"%\r"

          if [ $val -eq $max ];
          then
            echo ""
          fi
        fi
      fi
    fi
  fi
}

update_progress_bar 0
# Further (time intensive) actions and progress bar updates
update_progress_bar 100

如果你必须显示一个临时进度条(通过提前知道显示时间)，你可以像下面这样使用Python:

#!/bin/python
from time import sleep
import sys

if len(sys.argv) != 3:
    print "Usage:", sys.argv[0], "<total_time>", "<progressbar_size>"
    exit()

TOTTIME=float(sys.argv[1])
BARSIZE=float(sys.argv[2])

PERCRATE=100.0/TOTTIME
BARRATE=BARSIZE/TOTTIME

for i in range(int(TOTTIME)+1):
    sys.stdout.write('\r')
    s = "[%-"+str(int(BARSIZE))+"s] %d%% "
    sys.stdout.write(s % ('='*int(BARRATE*i), int(PERCRATE*i)))
    sys.stdout.flush()
    SLEEPTIME = 1.0
    if i == int(TOTTIME): SLEEPTIME = 0.1
    sleep(SLEEPTIME)
print ""

然后，假设您将Python脚本保存为progressbar.py，可以通过运行以下命令从您的bash脚本中显示进度条:

python progressbar.py 10 50

它将显示一个50个字符大小的进度条，并“运行”10秒。