Archive for the ‘Shell Scripting’ Category

Reading XML file using shell script

May 2, 2010 2 comments

This was like the first time where I had to write something that will be able to read something out of a XML file using a shell script. Usually I would use Python/Perl as my favorite choices in such a scenario but in this one I really *had* to do all within a shell script.

This is an example of the type of XML file I had to read:

<changelog>Fixed a new bug</changelog>
<name>Shoaib Mir</name>
<date>Sun, 02 May 2010</date>

I ended up having a shell script like this:


#Looking for four keywords in here
for key in changelog name date email
OUTPT=`grep $key log.xml | tr -d '\t' | sed 's/^\([^<].*\)$/\1/' `
eval ${key}=`echo -ne \""${OUTPT}"\"`

# Getting the results in four specific arrays
changelogarr=( `echo ${changelog}` )
namearr=( `echo ${name}` )
datearr=( `echo ${date}` )
emailarr=( `echo ${email}` )

#Print all Arrays
echo ${changelogarr[@]}
echo ${namearr[@]}
echo ${datearr[@]}
echo ${emailarr[@]}

Which gives me an output:

shoaib@shoaib-desktop:~/Desktop$ ./
Fixed a new bug Shoaib Mir
Sun, 02 May 2010

Shoaib Mir


Implementing Yes/No to continue

November 18, 2009 Leave a comment

Here is a quick how-to for doing something like “Do you wish to continue Yes/No” within shell scripting:

 echo "Will you like to delete $dir under $PWD for a fresh extract? (y/n)"
 read opt
        case $opt in
                Y|y) cleanfolder $dir ;;
                [Yy][Ee][Ss]) cleanfolder $dir ;;
                N|n) exit ;;
                [Nn][Oo]) exit ;;
                *) exit;;

This will look for almost all kinds of combination of Yes/No options and do the appropriate action depending on the user input.

Shoaib Mir