Shell Programming and Scripting

Hi All,


The file has the following.

=========start of file===
This is a file containing employee info

START
name john
id 123
date 12/1/09
END

START
name sam
id 4234
date 12/1/08 resigned
END

Total records 2
Date of extraction: 12-3-09
===end of file========



My requirement is this.

If the text is not between the pattern START and END, then it has be just printed.

If the pattern is between START and END and if the "date" line says "resigned", then I have to remove the entire block of text between START and END. Otherwise I have to have the text between START and END.

For the above file, the required output is with the details of Sam.

=========start of file===
This is a file containing employee info

START
name john
id 123
date 12/1/09
END

Total records 2
Date of extraction: 12-3-09
===end of file========

script using awk is helpful.

Thank you,
Vimala

Try this:

Code:

awk '$0 !~ /START/{print}
$0 ~ /START/
{while ($0 !~ /END/){s=s"\n"$0;getline}s=s"\nEND";
if(s ~ /resigned/){s="";next}else {print s;s=""}}' filename

cheers,
Devaraj Takhellambam

GNU awk

Code:

# awk 'BEGIN{RS=""}!/resigned/' file

Thank you for your help.
It provided the following output and then hangs. It gave the first line twice. What I want is to remove a block of data between START,END text if text inside the block matches a pattern. The file has many START,END blocks.

==
This is a file containing employee info

This is a file containing employee info

START
name john
id 123
date 12/1/09
END
===

This worked. Thank you.

Code:

# awk 'BEGIN{RS=""}!/resigned/' file

However, it is missing the blank lines. Is there anyway to get the blank lines as well.

thanks,
Vimala

what blank lines?

The output I get is
===
This is a file containing employee info
START
name john
id 123
date 12/1/09
END
Total records 2
Date of extraction: 12-3-09
===

Whereas the expected output is with the blank lines as it is in the input.
==
This is a file containing employee info

START
name john
id 123
date 12/1/09
END


Total records 2
Date of extraction: 12-3-09
==

Thanks again,
Vimala