似水无痕

为了便于老师调试我在期末课程设计中完善的此脚本，特将源代码发布在此。此脚本已经成为一个支持命令行参数、管道和stdin重定向为文件，并具有较高容错性能的脚本。


程序代码:
#!/bin/bash
#"Colorizing" Scripts

#First,define functions.


function subColor()
{
Fg=$1
Bg=$2
SetColor="\E[""$Fg;$Bg""m"
UseColor="\033[""$3""m"
EndColor="\033[0m"
Content=$e
echo -en "$SetColor""$UseColor"$Content"$EndColor"

}


function ShowHelp()
{
echo "Error!"
echo "Your parameters were $a,$b,$c,they are unexpected parameters."
echo "Show help file or continue?(h|c)"
if [ -c /dev/stdin ]
then
read Choice
else
Choice="h"
fi

case $Choice in
h|H)
echo
echo "This is a script for coloring characters and strings."
echo "There are four parameters.Parameters are seperated by spacebars."
echo "The frst parameter is a number ranged from 1 to 10,represents the foreground color."
echo "The second parameter is a number ranged from 1 to 10,represents the background color."
Color 1 8 2 "1 red" <&-;echo
Color 2 8 2 "2 green" <&-;echo
Color 3 8 2 "3 yellow" <&-;echo
Color 4 8 2 "4 blue" <&-;echo
Color 5 8 2 "5 magenta" <&-;echo
Color 6 8 2 "6 cyan" <&-;echo
Color 7 8 2 "7 gray" <&-;echo
Color 8 8 2 "8 white" <&-;echo
Color 9 8 2 "9 white" <&-;echo
Color 10 8 2 "10 black" <&-;echo
echo "The third parameter is a number ranged from 1 to 9,represents the style of the characters."
Color 10 8 1 "1 lighter,and bold" <&-;echo
Color 10 8 4 "4 draw a line under the string." <&-;echo
Color 10 8 7 "7 swap the foreground color and the background color" <&-;echo
Color 10 8 9 "9 draw a deleting line" <&-;echo
echo "The fourth parameter is the content you wanna clolor,a string."
echo "Thanks for using this script! "
echo "Script halted."
exit 1


;;
c|C)
echo "Script halted."
exit 1
;;
*)
ShowHelp
esac


}


function ParaCheck()
{
if [ $a -le 0 ] || [ $b -le 0 ] || [ $c -le 0 ] || [ $a -gt 10 ] || [ $b -gt 10 ] || [ $c -gt 9 ]
then
ShowHelp
else
if [ $a -eq 10 ]
then
a=30
else
a=30+$a
fi
if [ $b -eq 10 ]
then
b=40
else
b=40+$b
fi
fi
}


function GenString()
{
e=""
declare -i f=1

for d in $@
do
if [ $f -eq 1 ] || [ $f -eq 2 ] || [ $f -eq 3 ] || [ $d = "" ]
then
e=$e
elif [ $f -eq 4 ]
then
e="$e$d"
else
e="$e $d"
fi

let f=$f+1
done

}


function AwkGenL()
{
echo "BEGIN {" 1>op1.awk
echo 'FS="\n"' 1>>op1.awk
echo 'RS="EOF"' 1>>op1.awk
echo "}" 1>>op1.awk
Item=$1
echo "{print \$"$Item"}" 1>>op1.awk
}


function AwkGenC()
{
Item=$1
echo "{print \$"$Item"}" 1>op2.awk
}


function ReadRich()
{
declare -i lines=`wc -l sth.sth|awk '{print $1}'`
for ((i=1; i<=$lines;i=$i+1))
do
AwkGenL $i
AwkGenC 1
awk -f op1.awk sth.sth 1>tmp.tmp
declare -i a=`awk -f op2.awk tmp.tmp`
AwkGenC 2
declare -i b=`awk -f op2.awk tmp.tmp`
AwkGenC 3
declare -i c=`awk -f op2.awk tmp.tmp`
ParaCheck
declare -i words=`wc -m tmp.tmp|awk '{print $1}'`
words=$words-1
declare -i ParaPos=`awk '{print $1" "$2" "$3}' tmp.tmp|wc -m|awk '{print $1}'`
ParaPos=$ParaPos+1
declare -i w=$words-1
Tn=`cut -c$w-$words tmp.tmp`

if [ "$Tn" = "Tn" ]
then
words=$words-2
e=`cut -c$ParaPos-$words tmp.tmp`
subColor $a $b $c $e
echo
else
e=`cut -c$ParaPos-$words tmp.tmp`
subColor $a $b $c $e
fi
done
}


function Color()
{
declare -i a=$1
declare -i b=$2
declare -i c=$3


if [ -c /dev/stdin ]
then
ParaCheck
GenString $@
subColor $a $b $c $e
else
if [ -p /dev/stdin ]
then
ParaCheck
e=`cat /dev/stdin`
subColor $a $b $c $e
else
if [ -f /dev/stdin ]
then
cat /dev/stdin 1>sth.sth
ReadRich
yes|rm sth.sth 2>/dev/null
yes|rm tmp.tmp 2>/dev/null
yes|rm op1.awk 2>/dev/null
yes|rm op2.awk 2>/dev/null
else
ParaCheck
GenString $@
subColor $a $b $c $e
fi
fi
fi


}

#Here is where the script begins.

Color $@