Fgrep or grep or awk help - scanning for delimiters. Post: 302396300

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Top Forums Shell Programming and Scripting Fgrep or grep or awk help - scanning for delimiters. Post 302396300 by drl on Thursday 18th of February 2010 06:20:51 AM

02-18-2010

Registered User

Hi.

The AT&T cgrep command was designed to extract sections of text within a window:

Code:

#!/usr/bin/env bash

# @(#) s1	Demonstrate extraction of context window, cgrep.
# http://www.bell-labs.com/project/wwexptools/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

FILE1=data1
FILE2=data2

echo
echo " Data file $FILE1:"
cat $FILE1

echo
echo " Data file $FILE2:"
cat $FILE2

echo
echo " Results:"
cgrep -D +I2 +w '>' -f $FILE2 $FILE1

exit 0

producing:

Code:

% ./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 2009 )

 Data file data1:
>internalID1 / externalID1

GATTACA

>internalID2 / externalID2

GATTACA

 Data file data2:
internalID1

 Results:
>internalID1 / externalID1

GATTACA

See the URL noted in the script. You would need to download and compile the code, but I have done that in 32-bit and 64-bit environments without trouble.

If you are not comfortable with that, then someone may stop by shortly to offer an awk or perl code.

Best wishes ... cheers, drl

drl

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