shell script for the changing the element of xml [duplicate]

Question

I want to change the value of my xml "abc.xml" element to the value that is stored in the variable $value i.e

$value = 'abc';

<annotation>
    <filename>img_000001016592.png</filename>
    <folder>Rec_20121219_171905</folder>
    <source>
        <sourceImage>The MIT-CSAIL database of objects and scenes</sourceImage>
        <sourceAnnotation>LabelMe Webtool</sourceAnnotation>
    </source>
    <imagesize>
        <nrows>481</nrows>
        <ncols>640</ncols>
    </imagesize>
</annotation>

The shell script is required which has one variable and it contains the value in the variable and then change the value of the element filename of the abc.xml to the value in variable.

Answer 1

Perhaps you mean to use sed.

value='abc'
sed -i "s|abc.txt|$value|g" abc.xml

You would have to run that in a shell, or as a shell script with the header #!/bin/sh.

---- Update ----

#!/bin/sh
value="something"
sed -i "s|\(<filename>\)[^<>]*\(</filename>\)|\1${value}\2|" abc.xml

Add g to the sed command if you need to replace multiple instances in one line.

sed -i "s|\(<filename>\)[^<>]*\(</filename>\)|\1${value}\2|g" abc.xml