在Shell脚本中显示进度条

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注意：如果你使用的是Ubuntu，第一行中的程序路径一定要写/bin/bash而不是/bin/sh；其他版本的两者皆可，因为/bin/sh只是/bin/bash的一个软链接；在Ubuntu中/bin/sh是/bin/dash的软链接。

  • 方法一

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    #!/bin/bash
 
b=''
for ((i=0;$i<=100;i+=2))
do
       printf "progress:[%-50s]%d%%r" $b $i
       sleep 0.1
       b=#$b
done
echo

  • 方法二

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    #!/bin/bash
 
# progbar3.sh
# Simulate a progress bar with colors
# Author: Sofiane Cherchalli
# Date: 24 Oct 2010
 
dot="."
a=( '/' '-' '' '|' )
per=0
 
do_sleep() {
 local t="$1"
 which perl &>/dev/null && sleep_cmd="perl -e 'select(undef,undef,undef,$t)'" || sleep_cmd="sleep $t"
 eval "$sleep_cmd"
}
 
wait_4_esc() {
 local msg="Please, press two times ESC key to start demo: "
 while read -s -n2 -p "$msg" key; do
   printf "n"
   [ "$key" = "`echo $'x1bx1b'`" ] && break || msg="What??? I said Press TWO TIMES ESC key on your keyboard to start demo!. Is my english that bad? :( . Try again: "
 done
}
 
# main
wait_4_esc
printf "nThanks! :) . Starting demo right now...n"
while [ "$per" -le "100" ]; do
 showper=`expr $per % 10`
 if [ "$showper" = "0" ]; then
   if [ "$per" -le "30" ]; then
     printf "e[31m%s" "${per}%"
   elif [ "$per" -gt "30" -a "$per" -le "70" ]; then
     printf "e[33m%s" "${per}%"
   else
     printf "e[32m%s" "${per}%"
   fi
 fi
 
 for ((i=0; i<${#a[@]}; i++)); do
   printf "e[0m%s" "${a[${i}]}"
   do_sleep .1
   printf "e[1De[0K"
 done
 
 [ "$per" -lt "100" ] && printf "e[0m%s" "$dot"
 per=`expr $per + 1`
done
printf "e[0mnHYLI!nn"

  • 方法三

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    #!/bin/bash
 
# progbar6.sh
# Simulate a progress bar with colors
# Author: Sofiane Cherchalli
# Date: 24 Oct 2010
 
 
do_sleep() {
  local t="$1"
  which perl &>/dev/null && sleep_cmd="perl -e 'select(undef,undef,undef,$t)'" || sleep_cmd="sleep $t"
  eval "$sleep_cmd"
}
 
show_prog_bar() {
  local c="$1" # Character to use to draw progress bar
  local v=$2 # Percentage 0<= value <=100
 
  local pbl=50 # Progress bar length in characters
  local r=`expr 100 / $pbl` # Ratio between percentage value and progress bar length
  local p="$v%" # Percentage value to display in the middle of progress bar
  local l=${#p} # Length of string to display
  local pbs="" # Progress bar string
  local k=`expr ( $pbl - $l ) / 2` # Position where to substitute in progress bar string
  local n1=`expr $v / $r`
  local n2=`expr $pbl - $n1`
 
  for (( i=0; i<$pbl; i++ )); do
    pbs="${pbs}${c}"
  done
 
  pbs=`echo "$pbs" | sed 's/^(.{'"${k}"'})(.{'"${l}"'})(.*$)/1'"${p}"'3/'`
 
  printf "re[44m%se[41m%s" "${pbs:0:$n1}" "${pbs:$n1:$n2}"
}
 
# Simulate a child process doing some work. Progress percentage is wtitten to a temp file
some_work() {
  local a=(0 3 5 20 37 51 67 80 98 100) # Simulate some progress values done by worker
  local sl=(1 .3 .5 3 .5 .9 1 .8 1 3) # Simulate some work times
 
  for ((i=0; i> /tmp/progbar
    do_sleep ${sl[${i}]}
  done
}
 
wait_4_esc() {
  local msg="Please, press two times ESC key to start demo: "
  while read -s -n2 -p "$msg" key; do
    printf "n"
    [ "$key" = "`echo $'x1bx1b'`" ] && break || msg="What??? I said Press TWO TIMES ESC key on your keyboard to start demo!. Is my english that bad? :( . Try again: "
  done
}
 
# main
wait_4_esc
> /tmp/progbar
 
some_work &
pid=$!
 
per=0
printf "nThanks! :) . Starting demo right now...n"
while read line || [ "$per" -lt "100" ]; do
  if [ -n "$line" ]; then
    per=$line
    show_prog_bar " " $per
  fi
  do_sleep .1
done < /tmp/progbar
 
printf "e[0mnHYLI!nn"