sed appending needed only after first instance Post: 302496626

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Top Forums Shell Programming and Scripting sed appending needed only after first instance Post 302496626 by alister on Monday 14th of February 2011 04:35:32 PM

02-14-2011

Registered User

Quote:

Originally Posted by sunrexstar

Hi,
Here is my piece of code used with sed in shell script:

Code:

sed -i '/<falsemodule-option>/ a\<LdapLogin>' myxmlfile

The problem that i am facing with the above is that in 'myxml' file i have mulitple instances of

Code:

<falsemodule-option>

so when i execute the above sed command, it is appending the

Code:

<LdapLogin>

after every instance of

Code:

<falsemodule-option>

Please can some one help me to know if there is a way where i can append the text only after the first instance of the

Code:

<falsemodule-option>

and not after every instance of the

Code:

<falsemodule-option>

Thanks

The following sed script will print in a loop after the first match:

Code:

sed '/pattern/{a\
new text here
:loop
n
b loop
}'

Or, using ed:

Code:

ed -s file <<'EOED'
/pattern/a
new text here
.
w
q
EOED

Greetings and regards to all,
Alister

Last edited by alister; 02-14-2011 at 06:56 PM.. Reason: Misunderstood problem.

alister

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