CODEWITHSUNDEEP
bashscriptingsedawk
chao
chao

Reputation: 2024

Awk or Sed: Replace text between special characters (delimiters)

I do some research on how to replace text between delimiters, but because of lack knowledge in awk and sed I couldn't adjust command for my problem. The most similar question I found here, but after adjusting command to awk '/^(name=|&)/{f=f?0:1}f&&/*/{$0="//" $0}1' file it didn't work. Also, I would like do replace using variable instead of doing replace in file. And if I didn't ask to much, very short explanation would be great :)

I have next url in variable $url and variable $new=unnamed384:

http://www.example.com/?name=unnamed293&file=4

I need to replace text between "name=" and "&" with variable $new. E.g. This is variable $url before:

http://www.example.com/?name=unnamed293&file=4

This is variable $url after:

http://www.example.com/?name=unnamed384&file=4

Upvotes: 2

Views: 3663

Answers (3)

Chris Seymour
Chris Seymour

Reputation: 85865

How about:

$ new="unnamed384"

$ url="http://www.example.com/?name=unnamed293&file=4"

$ sed "s/name=[^&]*/name=$new/" <<< $url
http://www.example.com/?name=unnamed384&file=4

Upvotes: 3

Suku
Suku

Reputation: 3880

$new='unnamed384'; 
$echo 'http://www.example.com/?name=unnamed293&file=4' | awk -F'[=&]' '{ print $1"=""'"$new"'""&"$3"="$4 }'
http://www.example.com/?name=unnamed384&file=4

Upvotes: 0

Vijay
Vijay

Reputation: 67291

s/(.*\?name=)[^\&]*(&.*)/$1$n$2/g

The above will do. tested below(used with perl)

> echo "http://www.example.com/?name=unnamed293&file=4"
http://www.example.com/?name=unnamed293&file=4
> echo "http://www.example.com/?name=unnamed293&file=4" | perl -lne '$n="unamed394";$_=~s/(.*\?name=)[^\&]*(&.*)/$1$n$2/g;print'
http://www.example.com/?name=unamed394&file=4
>

Upvotes: 1

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