Edit xml file using shell script / command

bashbash-scriptingshellshell-scriptunix

I need to do this using unix script or command
There is a xml file in /home/user/app/xmlfiles like

<book>
   <fiction type='a'>
      <author type=''></author>
   </fiction>
   <fiction type='b'>
      <author type=''></author>
   </fiction>
   <Romance>
       <author type=''></author>
   </Romance>
</book>

I want to edit author type in fiction as local .

   <fiction>
      <author type='Local'></author>
   </fiction>

I need to change the author type which is in fiction tag with attribute b alone.
Please help me with this using unix shell script or command. Thanks !

Best Answer

If you just want to replace <author type=''><\/author> with <author type='Local'><\/author>, you can use that sed command:

sed "/<fiction type='a'>/,/<\/fiction>/ s/<author type=''><\/author>/<author type='Local'><\/author>/g;" file

But, when dealing with xml, I recommend an xml parser/editor like xmlstarlet:

$ xmlstarlet ed -u /book/*/author[@type]/@type -v "Local"  file
<?xml version="1.0"?>
<book>
  <fiction>
    <author type="Local"/>
  </fiction>
  <Romance>
    <author type="Local"/>
  </Romance>
</book>

Use the -L flag to edit the file inline, instead to printing the changes.

Related Solutions

Linux – Using a shell script but it fails with spaces on directory or name

You are quoting one of the $1 's but not the other. If your path contains spaces, quoting is essential. To be safe, it's best to assume that every path a script receives contains problematic characters, and quote every path.

Here's my suggestion:

gs  -q -dNOPAUSE -dBATCH -dSAFER \
    -sDEVICE=pdfwrite \
    -dCompatibilityLevel=1.3 \
    -dPDFSETTINGS=/screen \
    -dEmbedAllFonts=true \
    -dSubsetFonts=true \
    -dColorImageDownsampleType=/Bicubic \
    -dColorImageResolution=72 \
    -dGrayImageDownsampleType=/Bicubic \
    -dGrayImageResolution=72 \
    -dMonoImageDownsampleType=/Bicubic \
    -dMonoImageResolution=72 \
    "-sOutputFile=Compressed$1" \
    "$1"

In case you are wondering, it's fine to quote options like this; it's no different from quoting other kinds of arguments. gs -q and gs "-q" look exactly the same to gs when gs receives them.

We just use them here to make sure the entire path is made part of the -sOutputFile option , rather than what was previously the case: the fragment before the space was correctly assigned to the option argument, and the fragment after the space was an independent argument, that gs may well have treated as if it were the input file argument.

Best Answer

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Linux – Using a shell script but it fails with spaces on directory or name

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