Shell Programming and Scripting

Try this..

Code:

 awk '{if ($0 ~ /Element1/ || $0 ~ /Element2/ || $0 ~ /<user>/) { print;getline;if(/ue>#!/) {$0 ="<value>#!AAAAA</value>"} else{if(/rd>#!/){$0="<password>#!AAAAA</password>"}}}}1' file

Thanks for all the suggestions; still one question remains in mind, does awk or sed commands updates same input file.

practically speaking no one....(this is as per my knowledge..)

And this is always avoidable to perform reading and writing operation on the same file at the same time...

You have to create one more file and mv it to original file..

Code:

perl -pi -e

writes to same file and it will allow to replace a string with other, but really not aware on how to place a condition before repalce.
If some option to search for a value and then to next line, it will be helpful.

It is never a good idea to edit your originals. What if there's a bug in your program? You've wrecked your input data! Make a new file and check, or at least back up first.

I agree with Corona688 that it is never a good idea to edit your originals without a backup.

I am also concerned that every post you make changes what you want to do. First we're changing a value tagged "@%ID_Value" in a line following a line that contains a name tagged string ending in "/ID" to an unspecified value. Then the new string to replace "@%ID_Value" is specified to be "New Value". And, now you want to change ">#!" followed by any characters up to the last "<" on the line to (no matter what tags are used on the line following a line that contains Element1, Element2, or user (no matter what tags appear on that line).

This sounds like a very dangerous set of changes to make since "user" could easily appear as a value in a data element in your XML file as well as being a tag, but the following ed script will do what you're asking for after saving a backup copy of your original file (assuming your original xml file is named in.xml. If your xml file has a different name, change in.xml in the following script to the name of the xml file you want to update. The backup copy of your file will have the name of your xml file with an underscore character prepended (e.g., _in.xml):

Code:

#!/bin/ksh
file=in.xml
ed -s $file <<-EOF
        w _$file
        g/Element[12]/.+1s/>#!.*</>#!AAAAA</
        g/user/.+1s/>#!.*</>#!AAAAA</
        w
EOF

It worked, thanks to every one for your help and suggestions.

---------- Post updated at 05:59 PM ---------- Previous update was at 11:21 AM ----------

Hey would like to check one more thing. Can we have case sensitive check in ed as an additional requirement I can get first comparision element as "Element" or "ELEMENT" or "element"

Can some one throw some lite on it.