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Full Discussion: Removing Null data in output
Top Forums Shell Programming and Scripting Removing Null data in output Post 302131771 by liketheshell on Monday 13th of August 2007 04:25:58 PM
Old 08-13-2007
Removing Null data in output

Hello all,

I have a script that has an infile with system package information. For the most part the script is looking well. The only thing i need help is in testing for null entries and removing null data.


#!/usr/bin/ksh

for i in `cat /mwncps/bin/eco_pack`

do

NAME=`pkginfo -l | grep $i | grep 'NAME' | awk '{ print $5 }'`
VER=`pkginfo | grep $i | grep version | awk 'BEGIN {OFS=" "}{gsub(/version:/,"") ;}{ print $7 }'`

echo "`hostname`,"$NAME","$VER""

done

The output now looks like this

hostname,,
hostname,,
hostname,package,version <-- this part of the output is correct
hostname,package,version
hostname,package,version
hostname,package,version
hostname,, <-- this will need to be removed completely
hostname,,

I welcome your feedback

Regards,

Al
 

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CHDIST(1)																 CHDIST(1)

NAME
chdist - script to easily play with several distributions SYNOPSIS
chdist [options] [command] [command parameters] DESCRIPTION
chdist is a rewrite of what used to be known as 'MultiDistroTools' (or mdt). Its use is to create 'APT trees' for several distributions, making it easy to query the status of packages in other distribution without using chroots, for instance. OPTIONS
-h, --help Provide a usage message. -d, --data-dir DIR Choose data directory (default: $HOME/.chdist/). -a, --arch ARCH Choose architecture (default: `dpkg --print-architecture`). --version Display version information. COMMANDS
create DIST [URL RELEASE SECTIONS] Prepare a new tree named DIST apt-get DIST <update|source|...> Run apt-get inside DIST apt-cache DIST <show|showsrc|...> Run apt-cache inside DIST apt-rdepends DIST [...] Run apt-rdepends inside DIST src2bin DIST SRCPKG List binary packages for SRCPKG in DIST bin2src DIST BINPKG List source package for BINPKG in DIST compare-packages DIST1 DIST2 [DIST3, ...] compare-bin-packages DIST1 DIST2 [DIST3, ...] List versions of packages in several DISTributions compare-versions DIST1 DIST2 compare-bin-versions DIST1 DIST2 Same as compare-packages/compare-bin-packages, but also runs dpkg --compare-versions and display where the package is newer. compare-src-bin-packages DIST Compare sources and binaries for DIST compare-src-bin-versions DIST Same as compare-src-bin-packages, but also run dpkg --compare-versions and display where the package is newer grep-dctrl-packages DIST [...] Run grep-dctrl on *_Packages inside DIST grep-dctrl-sources DIST [...] Run grep-dctrl on *_Sources inside DIST list List available DISTs COPYRIGHT
This program is copyright 2007 by Lucas Nussbaum and Luk Claes. This program comes with ABSOLUTELY NO WARRANTY. It is licensed under the terms of the GPL, either version 2 of the License, or (at your option) any later version. Debian Utilities 2013-12-23 CHDIST(1)
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