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Full Discussion: How to execute command present config file?
Top Forums Shell Programming and Scripting How to execute command present config file? Post 302977862 by MadeInGermany on Friday 22nd of July 2016 03:02:27 PM
Old 07-22-2016
It is not a bit strange to assume external resources in the config file.
E.g. use $line, hoping that $line exists in the calling script.
If you really want that, you should put the per-line code in a function
Code:
file="/home/CSV/data.csv"file="bad"
badfile="/home/CSV/bad/"
runcode(){
num_fields=`echo "$line" | awk -F'|' '{print NF}'`
field1=`echo "$line" | awk -F'|' '{print $1}'`
}

and
Code:
. ./config.cfg
while IFS= read -r line
do
        runcode
        echo $num_fields
        echo "$field1"
done <"$file"

---------- Post updated at 14:02 ---------- Previous update was at 13:26 ----------

@rbatte1, the shell split differs from awk: a last empty field is not counted, $num_fields differs then.
Further, your code needs the delimiter
Code:
   IFS="|" my_array=($line)

and protection from argument expansion with
Code:
set -f

If the positional parameters can be used then there is no need for an array, and this works even with old Bourne shells
Code:
set -f
oIFS=$IFS; IFS="|"
while read -r line
do
   set -- $line
   echo "number of fields $#"
   echo "First field $1"
done <"$file"
set +f
IFS=$oIFS

 

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LEARN ABOUT CENTOS

processcsv.py

PROCESSCSV.PY(1)					      Virtualization Support						  PROCESSCSV.PY(1)

NAME

       processcsv.py - process virt-top CSV files

SUMMARY

	virt-top --csv data.csv
	processcsv.py < data.csv

DESCRIPTION

       virt-top is a top(1)-like utility for showing stats of virtualized domains.

       processcsv.py is a simple Python script that post-processes the output of "virt-top --csv".

       It is used like this:

	virt-top --csv data.csv
	processcsv.py < data.csv

       The second command will overwrite the following files in the current directory:

       "global.csv"
	   This contains the global (host) statistics columns from the CSV file.

       "domainNN.csv" (multiple files)
	   For each libvirt domain ID NN, a file is created containing the per-domain statistics from the CSV file.

SEE ALSO

       virt-top(1)

AUTHORS

       Richard W.M. Jones <rjones @ redhat . com>

COPYRIGHT

       (C) Copyright 2007-2012 Red Hat Inc., Richard W.M. Jones http://libvirt.org/

       This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
       the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation,
       Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

virt-top-1.0.8							    2013-12-29							  PROCESSCSV.PY(1)
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