Shell Programming and Scripting

i have a file where the hostnames and variables are in same line in below format, am able extract some part variables while otherlike subscriptions and handler is missing.

can you please correct me if grep is able to perform this ?

Code:

cat /tmp/test
localhost subscriptions='["production", "masters", "fileserver", "cldb", "nfs"]' handler="genie"
host1.localhost.com a=apple
host2.localhost.com b=ball c=cat

raavula@qaphdm001:~/deployment/ansible$ grep -Eo "\w+=\w+" /tmp/test
a=apple
b=ball
c=cat

Noting that \w is not a "standard" feature in an extended regular expression and noting that on systems where \w is requesting a match to a word, there is no word between the = and the ' in subscriptions=' and that there is no word between the = and the " in handler="; what additional output were you hoping to get?

What operating system are you using?

What shell are you using?

Is this a homework assignment?

thank you @Don Cragun

am using ubuntu with bash shell.

this is not assignment, i'm trying to write a wrapper script around where my application not able to detect variables declared in inventory as above.

alternatively i can do using sed or awk but i want to keep it simple with grep so trying to do with it

It can probably be done with grep if you clearly define EXACTLY what it is that you are trying to match with your ERE. It looks to me like the output you got was exactly what you requested. (And you still haven't said what output you are hoping to get from your sample input.)

i need to get matches around "=" , am trying for output like below

my expected output

Code:

subscriptions='["production", "masters", "fileserver", "cldb", "nfs"]'
handler="genie"
a=apple
b=ball 
c=cat

We now have 5 examples of what you want, but we do not have any specification for what constitutes a valid string on the left side of the = nor a valid string on the right side of the =.

I repeat: 5 examples do not make a clear definition of exactly what you are trying to match and I don't want to waste my time writing code that will work with your current examples to then be told that I didn't correctly guess at your additional unstated real requirements.

only thing am trying to achieve is extracting variables, as all variables which are assigned with "=" operator. so am trying to get complete word around "=".

Thank you for you time and inputs. i will try to escape the characters like symbols like ',[ for now or possibly with awk and optimize it later.