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Top Forums Shell Programming and Scripting Handle Configuration File with same name of Parameter in multiple Sections Post 302172864 by potro on Wednesday 5th of March 2008 02:11:09 AM
Old 03-05-2008
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.

I want to read this values and later to write them back in the new config file with:
sed -e "/\[Billing\]/,/^[^#][:space:]*ProcessorsNumber =/ s-\(^[^#][:space:]*ProcessorsNumber = \)\([^#]*\)-\1$BILLPROCESSORSNUMBER-1" \
This sed works.

So it is alll about how to read correct from the file.

Thanks
Bianca
 

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GREP(1) 						      General Commands Manual							   GREP(1)

NAME
grep - search a file for lines containing a given pattern SYNOPSIS
grep [-elnsv] pattern [file] ... OPTIONS
-e -e pattern is the same as pattern -c Print a count of lines matched -i Ignore case -l Print file names, no lines -n Print line numbers -s Status only, no printed output -v Select lines that do not match EXAMPLES
grep mouse file # Find lines in file containing mouse grep [0-9] file # Print lines containing a digit DESCRIPTION
Grep searches one or more files (by default, stdin) and selects out all the lines that match the pattern. All the regular expressions accepted by ed and mined are allowed. In addition, + can be used instead of * to mean 1 or more occurrences, ? can be used to mean 0 or 1 occurrences, and | can be used between two regular expressions to mean either one of them. Parentheses can be used for grouping. If a match is found, exit status 0 is returned. If no match is found, exit status 1 is returned. If an error is detected, exit status 2 is returned. SEE ALSO
cgrep(1), fgrep(1), sed(1), awk(9). GREP(1)
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