CODEWITHSUNDEEP
regexbashsed
vidya sagar Kushwaha
vidya sagar Kushwaha

Reputation: 81

How to use -n flag in a sed script, I used it and it is giving error

$ sed -n '/<body>/,/<\/body>/p' hello.html

The command works fine and gives desired result. I want to print only those which lines between and (including these tags as well) of an html file named as hello.html

But when I try to create a sed script named as html-body.sed with this command as:

-n /<body>/,/<\/body>/p

when I try to run it....

$ sed -f html-body.sed hello.html

It gives error as:

sed: file html-body.sed line 1: unknown command: `-'

Why this same command, when written in sed script gives this error.

Upvotes: 0

Views: 326

Answers (1)

paxdiablo
paxdiablo

Reputation: 881993

The sed script is only allowed to hold sed text processing commands, not options to sed itself.

Those options are required to be on the actual command invocation.

You can still use a sed script but you have to call it with the options:

sed -n html-body.sed hello.html

One thing you can do is switch to a more powerful text processing tool such as awk with the following script:

/<body>/   {e=1}
           {if(e==1){print}}
/<\/body>/ {e=0}

Then simply run:

awk -f thatscript.awk inputfile

Upvotes: 1

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