sed -i switch and here document not working :(:(:(
 

Here is what I am trying to do.
and it is not working :(:(

Basically I want to grab that text in here's document and feed in to sed with i and /r somehow it is not working.....


Your assistance is highly appreicated.

Thank you.

How is a here document equivalent to a file??

May be I am an idiot, please educate me how to do with here document.


Your help would me much appreciated.

Hi,

the -i option only edits files. A here document is not a file, hence the -i option is useless.
What you probably want is something like this:
Notice the bold part. It marks the end of input and returns the bash prompt.

I don't think s switch would work here.
I want to edit the file/update the file and save.
The file would be having node as follows:
<webapp>
</webapp>
My aim is to edit/update file such that it would end up with following.
<webapp>
<session-config>
<session-timeout>-1s</session-timeout>
</session-config>
</webapp>

This is what I want to achieve on the side not when should we use here document?

I was merely providing an example on how to use here documents with sed. Use whatever commands you deem fit to achieve your goal. From your examples, I do not understand what you are actually trying to do.

I was merely providing an example on how to use here documents with sed. Use whatever commands you deem fit to achieve your goal.From your examples, I do not understand what you are actually trying to do.
When a ear file is deployed onto Application server, the cofiguration file orion-web.xml has a node called
<webapp>
</webapp>
I want the text in discussion to be inserted in between <webapp> and </webapp>

I wish to implement some intelligent scripting mechanism without using any other external file(without cat).

Hope I have made it clear.

Thanks.

Instead of a HERE document, insert the sed command needed into your script:

Add the lines for the text you want to add, and escape the return character with a backslash.
It will be as easy to edit your script as a here document inside a script would be.

Another option, since you know the contents of the file, is to replace the file in it's entirety.

A third choice would be assuming you wish to use the /r option of sed is to actually place the text in a file and call
it as you have done:

It seems I'm leading nowhere:(:( cooking slowly n steady.

@jschiwal
Your first method,work's fine but in document/configuration file I can see text but with appended "\" moreover If I run script multiple times, multiple instances of configuration text is observed:(
I tried your second implementation, exactly as you prescribed, however the resultant file has only
and nothing else.

@grail

I did something like this.
After runing script it gives me error message.
Now, I am bit upset because the one which I am giving below was working but today it is not working!!!

echo $?
File has a node which looks like this.

It returns zero as retun code but the configuration file is unchanged!! If I cannot implement simple subitute with sed, it is disgusting.

Please help me learn the evil sed, but no wonder it is super powerful!!

Thanks guys your assistance is much appreciated:):)

So, if I understand correctly then you are not trying to edit a here document but the here document is supposed to be read by sed's r command, right? Not sure why it has to be a here document but try this:
The r command reads a file. It cannot read a here document because a here document is not a file. You can, however, redirect the contents of a here document to a file like shown above.

The issue with the sed and /r is there should be no slash at the end ... my bad:
Tested and works.

Sorry Guys after all attempts it failing again again and again.

I can see the timestamp is updated but contents of file are not changed.

Piece of code exactly in script.

One more thing why this regex is not working! :(:(

here we say "after = sign whatever character's do not worry,change value of XML to LDAP, why can't work???

Actual file,
I know this can't be that hard, this is driving me crazy why the hell is this not working............................

This one is working however for multiple run's it is introducing more that 1 instance of configuartion value, I want only one and one between <web-app> and </web-app>

Have a look at my post run file when ran twice!!

WHat we need to achieve is like this

So there are a few confusing things here:

1. Start of post #13 says the code does not work and yet post #14 says it does??

2. If you run the code twice why would it not perform the task twice??