Bash : How to print words between brackets

Enindu · 05-12-2014, 07:04 AM

This is my text file.

Code:

Blah.. Blah.. Blah.. Blah.. Blah.. 
Blah.. Blah.. Blah.. Blah.. Blah.. 
Blah.. Blah.. Blah.. Blah.. Blah.. 

TEXT=('ABC'
      'DEF'
      'GHI')

Blah.. Blah.. Blah.. Blah.. Blah.. 
Blah.. Blah.. Blah.. Blah.. Blah.. 
Blah.. Blah.. Blah.. Blah.. Blah..

I want to print "ABC", "DEF" and "GHI" in terminal, like this.

Code:

[enindu@enindu-pc ~]$ ABC DEF GHI

Still learning Bash. Is there any way to do that. Thanks in advance.

pan64 · 05-12-2014, 07:18 AM

sure, there is a way. it is not bash, but sed, awk or something.
For example:

Code:

awk ' BEGIN { FS="[()]"; RS="QQQQQQ" } { print $2 } ' yourfilename

Enindu · 05-12-2014, 08:56 AM

Well, please can you describe that command? What if I have two bracket fields in text document? Like this.

Code:

TEXT_1=('ABC'
        'DEF'
        'GHI')

TEXT_2=('JKL'
        'MNO'
        'PQR')

And I want to print "JKL", "MNO" and "PQR". How can I do it using that "awk" command? Thanks again.

grail · 05-12-2014, 10:05 AM

You asked for help and were provided a possible solution. It is now up to you to do some work. Of course ask questions when stuck, but please put in some effort.

pan64 · 05-13-2014, 02:33 AM

Ok, so see man awk about general syntax. FS is a field separator, it is set to ( or ). RS is set to QQQQQ which probably will never occur in your source, therefore all the input file taken as one single line. It is splitted by FS and printed the second part. You can freely improve it for example by using gsub to replace parts of the text and add print $4 ....
But first you would need to investigate, understand how it works and try to adjust it according to your real needs. That will give you a much usable result.