get variable on certain portion of a file

[packets]

#!/usr/bin/perl

#===========whitelist start=======================
$whitelist = $whitelist . "
test\@yahoo.com
test34\@gmail.com
";
#===========whitelist end=======================


#===========blacklist start=====================
$blacklist = $blacklist . "
test\@gmail.com
test987\@yahoo.com
";
#===================blacklist end===============

I have a file containing above. I need to create 2 variables. 1 variable containing the text inside whitelist start and whitelist end and 1 variable containing the text inside blacklist star and blacklist end. What will happen is variable 1 will have test\@yahoo.com and test34\@gmail.com while variable 2 is test\@gmail.com and test987\@yahoo.com

Is there a way I can do this by making a script.

TIA

[drl]

Hi.

I find a non-standard utility cgrep useful for tasks like this. Here is a sample script that extracts the whitelist section of the data:

#!/usr/bin/env bash

# @(#) s1	Demonstrate extraction of pattern-bounded text, cgrep.

echo
set +o nounset
LC_ALL=C ; LANG=C ; export LC_ALL LANG
echo "Environment: LC_ALL = $LC_ALL, LANG = $LANG"
echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version "=o" $(_eat $0 $1) cgrep
set -o nounset
echo

FILE=${1-data1}

echo " Data file $FILE:"
cat $FILE

echo
echo " Results:"
v1=$(cgrep -D -I2 -w 'whitelist start' +I2 +w 'whitelist end' '$whitelist' $FILE)
echo " variable v1 is:"
echo "$v1"

exit 0

producing:

% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0 
GNU bash 3.2.39
cgrep - (local: ~/executable/cgrep May 29 10:59 )

 Data file data1:
#!/usr/bin/perl

#===========whitelist start=======================
$whitelist = $whitelist . "
test\@yahoo.com
test34\@gmail.com
";
#===========whitelist end=======================


#===========blacklist start=====================
$blacklist = $blacklist . "
test\@gmail.com
test987\@yahoo.com
";
#===================blacklist end=============== 

 Results:
 variable v1 is:
$whitelist = $whitelist . "
test\@yahoo.com
test34\@gmail.com
";

The -I2 -w options specify that the start of the context window is defined by a following string, but that the line itself should not be included, similarly with the +I2 +w options.

The cgrep source is at cgrep home page I have compiled it under 32-bit systems, and recently under a 64-bit system (Debian), both with no trouble.

Best wishes ... cheers, drl

[packets]

thanks for the reply. It is a big help!!!