Sed replace using same pattern repeating multiple times in a line

Shell Programming and Scripting
1

Sed replace using same pattern repeating multiple times in a line

I have text like below in a file:

I am trying to replace the above line to following

How can I acheive this?

I am able to do it if the occurrence is for 1 time:

But If I try like below

I am getting like this:

I have to limit it to every occurrence of the pattern.
Thanks for your help.

2

You're falling victim to the greedy match. Have a go with this:

echo "/*<tagz>*/${tagz}.unix some random text and /*<tag1>*/${tag}.unix" | sed -E 's!\*<([^>]*)>[^.]*\.!*<\1>*/${\1}.!g'

Only tried it on your sample and one other contrived example, so it might not be perfect. I also prefer using -E to avoid escaping parens which just make it messy. If you are using a BSD based sed it'll be a different (-r or -R, I cannot remember and my BSD box isn't up right now).

3

I don't see the pattern you're trying to match nor the desired change you want from your example. You seem to say that you want to change

/*<tagz>*/hello.

to:

/*<tagz>*/${tagz}.

which I can easily make happen, but then you want the same substitution command to change

/*<tag2>*/bye.

to:

/*<tag1>*/<tag>.

which seems entirely different.

Please describe in words the pattern you are trying to match and describe the replacement that you want to make for that pattern.

4

Sorry for the typo:

I am trying to match the pattern

hello and bye are not same always, there can be anything in place hello and bye.

I am trying to remember the value and repalce it like below:

---------- Post updated at 07:54 PM ---------- Previous update was at 07:51 PM ----------

-E illegal option

5

OK. The following should work with any sed that conforms to the standards:

sed 's|/\*<\([^>]*\)>\*/[^.]*.|/*<\1>*/${\1}.|g'