Go Premium for a chance to win a PS4. Enter to Win

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 4292
  • Last Modified:

how to read special characters in shell script

How to read special characters in bash shell?
I need to read 2 file names which could contain special characters, like $ # etc.
I am appreciate someone can help me with this. this code is really make me crazy. Thanks
#!/bin/bash
#Process one file##############
read() {
     tempPoint=0
     line=1
     while [ $line -le $lineCount ]
     do    
	subPoint=`sed -n "$line"p $file | awk '{print $2}'`
        name=`sed -n "$line"p $file | awk '{print $1}'	`
        if [ -n "$name" ]
        then {
        if [ $Name = $name ]
        then
        {
        tempPoint=$subPoint
        }
        fi
        }
        fi
        line=`expr $line + 1`
    done
    if [ $tempPoint -ne 0 ]
    then
    	totalPoint=`expr $totalPoint + $tempPoint`
    fi
}
######main program###############
 
if [ $# -eq 0 ]
then
    echo "no arguments"
    echo
    exit 1
fi
if [ $# -eq 1 ]
then
    echo "no files"
    echo
    exit 1
fi
if [ $# -eq 2 ]
then
    echo "no files"
    echo
    exit 1
fi
Name=$1
shift
totalPoint=0
total=0
until [ $# -eq 0 ]
do
    if [ -f "$1" ]
    then
     {
     file=$1
     total=`expr $total + 1`
     lineCount=`wc -l < $file`
     read
    }
    fi
    shift
done
 
if [ $total -eq 0 ]
then
{
   echo "no files"
   echo
}
else
{
   echo $Name "AVG:" `expr $totalPoint / $total`
}
fi

Open in new window

0
matchge
Asked:
matchge
  • 3
  • 3
2 Solutions
 
TintinCommented:
What problem are you having?  Works fine for me.  Remember that you should quote filenames with funny characters, eg:

script 'file1$#' 'file2$%'
0
 
matchgeAuthor Commented:
Thank you very much.
But what if I want to input without the single quote?
Thanks for ur comments.
0
 
TintinCommented:
Very much depends on your shell.

For example in bash, you can set the GLOBIGNORE environment variable to ignore various glob characters such as * and ?, eg:

export GLOBIGNORE=*:?

However, for $, you need to escape it with either single quotes or backslash, eg:

script file1\$#
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
matchgeAuthor Commented:
So,you mean I need to consider all the possibility $,#,\,'," etc? Is there any fast and convince way to handle them all?
Thank you ~~~
0
 
matchgeAuthor Commented:
where can I find out how to handle other special characters? like #,space,',",\ ?
0
 
TintinCommented:
Using single quotes is the most reliable, simple way of specifying meta-characters.  If the data also includes a single quote, you need to use a backslash, eg:

'abc\'def'
0
 
ahoffmannCommented:
> Is there any fast and convince way to handle them all?
simply prefix each character by \  (backslash)
Otherwise you have to use quotes or a shell which has no meta characters.
0

Featured Post

How to Use the Help Bell

Need to boost the visibility of your question for solutions? Use the Experts Exchange Help Bell to confirm priority levels and contact subject-matter experts for question attention.  Check out this how-to article for more information.

  • 3
  • 3
Tackle projects and never again get stuck behind a technical roadblock.
Join Now