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I have a requirement where I need to add a new entry for the custom top to be created, in the context_file of ebs application installed in Oracle Linux 6. The context_file is an XML file. We need to search for a string and then we need to add a new entry just after the searched string.

  1. Search the string AU_TOP> in the file.
  2. Insert a string in a new line just after AU_TOP>

    <TEST_TOP oa_var="s_testtop" oa_type="PROD_TOP" oa_enabled="FALSE">/u01/oracle/oracle/apps/apps_st/appl/test/12.0.0</TEST_TOP>

  3. Save the file.

How can this be accomplished using a shell script?

  • 1
    With great difficulty unless you include sample input and output. And even then, parsing XML with shell scripting is like performing brain surgery with a plastic teaspoon. – jasonwryan Mar 31 '17 at 4:32
  • sed '/AU_TOP>/a /u01/oracle/oracle/apps/apps_st/appl/test/12.0.0'? – heemayl Mar 31 '17 at 4:33
  • Thanks for your comment jason. I ran the command it inserted the the line but how to save the file with the changes? – user3436389 Apr 2 '17 at 8:40
  • Eg - My xml file contains the following entry <AU_TOP oa_var="s_autop" oa_type="PROD_TOP" oa_enabled="FALSE">/u01/oracle/VIS/apps/apps_st/appl/au/12.0.0</AU_TOP> <FND_TOP oa_var="s_fndtop" oa_type="PROD_TOP" oa_enabled="TRUE">/u01/oracle/VIS/apps/apps_st/appl/fnd/12.0.0</FND_TOP> – user3436389 Apr 2 '17 at 8:41
  • When I gave the following command sed '/AU_TOP>/a /u01/oracle/oracle/apps/apps_st/appl/test/12.0.0' text.txt it inserted a newline in the output but how to save the new line inserted in the file? – user3436389 Apr 2 '17 at 8:42
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Stealing heemayl's idea from the comments, then adding -i for in-place editing and newlines for the 'append' command and desired newline afterwards:

sed -i '/AU_TOP>/a\
<TEST_TOP oa_var="s_testtop" oa_type="PROD_TOP" oa_enabled="FALSE">/u01/oracle/oracle/apps/apps_st/appl/test/12.0.0</TEST_TOP>

' context_file.xml
  • Hi Jeff, I tried what you said and it worked however I am facing another issue, the sed command is not taking any $ variables, Eg #!/bin/bash export CONTEXT_FILE=test_dba.xml export APPL_TOP=/root echo -n "Name: " read name top=$(echo "<${name^^}_TOP oa_var=\"s_echo $nametop\" oa_type=\"PROD_TOP\" oa_enabled=\"FALSE\">echo $APPL_TOP/$name/12.0.0</${name^^}_TOP>") echo $top sed -i '/AU_TOP>/a "${top}"' $CONTEXT_FILE however when passing the value for a variable like ERP it only appends $top as a value in the xml file and does not pass the value stored in the $top. – user3436389 Apr 10 '17 at 18:10
  • Happy to hear it's working! To get variables' values into sed, you have to use double quotes; single quotes prevent the shell from inserting variable values. – Jeff Schaller Apr 10 '17 at 18:38

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