Grep+AWK Handle Configuration File with same name of Parameter in multiple Sections

[potro]

Config File example
[Billing]
LocalIPAddress = 192.168.1.116
ProcessorsNumber = 1
[Plugins]
LocalIPAddress = 192.168.2.116
ProcessorsNumber = 2
[Statistics]
LocalIPAddress = 192.168.3.116
ProcessorsNumber = 1

I manage to read like this:
BILLPROCESSORSNUMBER=`grep -m1 '^[^#][:space:]*ProcessorsNumber' $OLD_CFG | awk -F" = " '{print $2}' |tail -1`

PLUGINPROCESSORSNUMBER=`grep -m2 '^[^#][:space:]*ProcessorsNumber' $OLD_CFG | awk -F" = " '{print $2}' |tail -1`

STATPROCESSORSNUMBER=`grep -m3 '^[^#][:space:]*ProcessorsNumber' $OLD_CFG | awk -F" = " '{print $2}' |tail -1`

But I'm worried if the sections in the config file will switch and the order not preserved ... then the grep -mX and tail will not give me the proper value for the section/parameter I want.

Thanks,
Bianca

[ghostdog74]

which part of the example configuratoin file do you actually want to grab?

[potro]

I want to take for each section the ProcessorsNumber parameter into separate variables:

For example:
1. for [Billing] section I will have the BILLPROCESSORSNUMBER variable with the ProcessorsNumber value from this section.
2. for [Plugins] section I will have the PLUGINPROCESSORSNUMBER variable with the ProcessorsNumber value from this section.

and further I will do the same with the other parameters in the config file (such as LocalIPAddress)

[ghostdog74]

only tested on sample input and assuming always ProcessorNumber and localIP at every block

awk 'BEGIN{FS="="}
/^\[/ {
   line=$0
   getline 
   IP=$2
   getline   
   ProcessorNumber=$2
   print line,IP,ProcessorNumber
   }
' "file"

output:

# ./test.sh
[Billing]  192.168.1.116  1
[Plugins]  192.168.2.116  2
[Statistics]  192.168.3.116  1

[potro]

This doesn't work in my case because the config file has many lines (text and other parameters) in between and the parameters position is not fixed.


[Billing]
#texttex
LocalIPAddress = 192.168.1.116
Another Parameter = xxx
ProcessorsNumber = 1
[Plugins]
ProcessorsNumber = 2
#text text
Another Parameter = yyy
Another Parameter = zzz
LocalIPAddress = 192.168.2.116
[Statistics]
#text text
#text text
LocalIPAddress = 192.168.3.116
#text text
ProcessorsNumber = 1

[radoulov]

% awk '/^\[/{s=$2}$0~p{printf "%s_%s=%s\n",s,p,$2}' p="Processors" FS=" *= *|[][]" file
Billing_Processors=1
Plugins_Processors=2
Statistics_Processors=1
% awk '/^\[/{s=$2}$0~p{printf "%s_%s=%s\n",s,p,$2}' p="IP" FS=" *= *|[][]" file
Billing_IP=192.168.1.116
Plugins_IP=192.168.2.116
Statistics_IP=192.168.3.116

[potro]

Hi radoulov

Your awk gave me this:
awk '/^\[/{s=$2}$0~p{printf "%s_%s=%s\n",s,p,$2}' p="ProcessorsNumber" FS=" *= *|[][]" config.file

output:
Billing_ProcessorsNumber=1
Plugins_ProcessorsNumber=2
Statistics_ProcessorsNumber=4

It took the correct values from my config.file

But how can I give the values to variable for each section ?

BILL_PROCESSORS=awk '/^\[/{s=$2}$0~p{printf "%s_%s=%s\n",s,p,$2}' p="ProcessorsNumber" FS=" *= *|[][]" config.file

Where in this command should I mention the Billing section for which I need the parameter value?

Thanks a lot,
Bianca

[potro]

BILL_PROCESSORS=`awk '/^\[/{s=$2}$0~p{printf "%s_%s=%s\n",s,p,$2}' p="ProcessorsNumber" FS=" *= *|[][]" /etc/ServiceBrokerFramework.cfg |grep Billing |awk -F"=" '{print $2}'`

This does the job.
Do you have a more elegant solution?

Thanks,
Bianca

[radoulov]

You can use a function:

get_param(){
(($#==3))||{ printf "Usage: %s [fname] [section] [param]\n" $0;return 1;}
awk '$0~s{f++}f&&$1~p{print $2;exit}' s="$2" p="$3" FS=" *= *" "$1"
}

For example:

% cat config
[Billing]
#texttex
LocalIPAddress = 192.168.1.116
Another Parameter = xxx
ProcessorsNumber = 1
[Plugins]
ProcessorsNumber = 2
#text text
Another Parameter = yyy
Another Parameter = zzz
LocalIPAddress = 192.168.2.116
[Statistics]
#text text
#text text
LocalIPAddress = 192.168.3.116
#text text
ProcessorsNumber = 1

% get_param config Plugins IP
192.168.2.116
% bill_ip="$(get_param config Billing IP)"
% echo "$bill_ip"
192.168.1.116

[potro]

Works only for the first section

[root@skynet bianca]# cat xbs.sh
#!/bin/bash
get_param(){
(($#==3))||{ printf "Usage: %s [fname] [section] [param]\n" $0;return 1;}
awk '$0~s{f++}f&&$1~p{print $2;exit}' s="$2" p="$3" FS=" *= *" "$1"
}

plugin_processors="$(get_param config Plugins ProcessorsNumber)"
echo $plugin_processors

Return value: 1 instead of 2.

Bianca