Effects of grep -o when it's not available Post: 302268977

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Top Forums UNIX for Dummies Questions & Answers Effects of grep -o when it's not available Post 302268977 by earnstaf on Tuesday 16th of December 2008 03:48:30 PM

12-16-2008

Registered User

Quote:

Originally Posted by joeyg

Code:

> testval="this is"
> echo "wow this is a test" | sed "s/$testval/~&~/" | tr "~" "\n" | grep "$testval"
this is

Is that what you are looking for?

That is clever, but I don't know if it works for my situation, which is this:

I have a record that looks like:

Code:

acl add name=ACL_RULE_NAME pos=400 action=allow agent=proxy authneeded=no \
dest=netgroup:destinations_ssh destburb=external nataddr= \
service=ssh source=ipaddr:1.2.3.4 sourceburb=internal \
comments='this is comments' \
lastchangedby='changed by the guy'

I want to break that down and pull out just the stuff I care about, namely name, dest, destburb, source, sourceburb and service.

I had planned on doing something like:

Code:

while read line 
do
source=`grep -o "source=.* "`
dest=`grep -o "dest=.* "`
echo "$source $dest"
done

I'm sure there is a more elegant or effective way... actually now that I'm looking at it that wont work since they records are on different lines... might have to use awk. However, I cant even get the idea in motion without grep -o.

earnstaf

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LEARN ABOUT PLAN9

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)

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zgrep