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Struggling with arrays and delimited file

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# 1  
Old 02-02-2009
Question Struggling with arrays and delimited file
Hi,

I am trying to use arrays in my script but can not seem to get it to work.

I have a file called sections, this contains headers from a tripwire log file, separated by "@" but could be "," if easier
The headers will be used to cut sections from the log file into another to be mailed.

sections looks like this:
Code:
Section: Unix File System@Total violations found
Rule Name: System Boot Changes@Added object name:

I have taken the following snippet of code for test purposes but can not get it to work. I get [: 0: unary operator expected

Code:
#!/bin/bash

SPArraya=( "${SPArraya[@]}" 'awk -F'@' '{ print $1 }' sections')
SPArrayb=( "${SPArrayb[@]}" 'awk -F'@' '{ print $2 }' sections')

#Displaying the contents of the array
i=0
while [ $i -lt $len ]
 do
FIRSTLINE=${SPArraya[$i]}
LASTLINE=${SPArrayb[$i]}
i=$((i+1))
echo "Section" $i
echo "First line is: " ${SPArraya[$i]}
echo "Last line is: " ${SPArrayb[$i]}
done


Can someone please help.
# 2  
Old 02-02-2009
Code:
SPArraya=( "${SPArraya[@]}" 'awk -F'@' '{ print $1 }' sections')

I'm as confused as the shell is as to what you're trying to do here. You've got strings inside strings inside strings going on, but the shell can't tell a starting ' and an ending ' apart because they're the same character. Maybe wrap the awk thing in double-quotes.
# 3  
Old 02-03-2009
Hi,

I am very confused too as I am struggling with the array syntax but really want to understand it.

to make this simpler if I had input.txt with the following text in it:
Code:
google,www.google.co.uk
bbc,www.bbc.co.uk
distrowatch,www.distrowatch.com

Then If I wanted to read this into an array and run commands on it how would this be done.

So I could get:

Code:
read sites < input.txt
{
array code
}
echo "Displaying" $array1 "Web Site"
links -dump $array1
echo "Displaying" $array2 "Web Site"
links -dump $array2
echo "Displaying" $array3 "Web Site"
links -dump $array3

How would this be done, excuse the lame example.
# 4  
Old 02-07-2009
Quote:
Originally Posted by pobman
Hi,

I am very confused too as I am struggling with the array syntax but really want to understand it.

to make this simpler if I had input.txt with the following text in it:
Code:
google,www.google.co.uk
bbc,www.bbc.co.uk
distrowatch,www.distrowatch.com

Then If I wanted to read this into an array and run commands on it how would this be done.

So I could get:

Code:
read sites < input.txt
{
array code
}
echo "Displaying" $array1 "Web Site"
links -dump $array1
echo "Displaying" $array2 "Web Site"
links -dump $array2
echo "Displaying" $array3 "Web Site"
links -dump $array3

How would this be done, excuse the lame example.
I'm not sure what you want the array for when you can deal with them one-by-one instead of storing them, but here goes:

Code:
# Make read split apart on ','
IFS=","
NAMES=()
SITES=()
N=0
while read NAME SITE
do
        echo "Displaying $NAME $SITE"
        NAMES[$N]="$NAME"
        SITES[$N]="$SITE"
        N=$((N+1))
done < input.txt

# 5  
Old 02-08-2009
Bug
Perfect thanks just what I wanted.Smilie
# 6  
Old 02-09-2009
Quote:
Originally Posted by corona688
i'm not sure what you want the array for when you can deal with them one-by-one instead of storing them, but here goes:

Code:
# make read split apart on ','
ifs=","
names=()
sites=()
n=0
while read name site
do
        echo "displaying $name $site"
        names[$n]="$name"
        sites[$n]="$site"
        n=$((n+1))


No need for a counter:

Code:
names[${#names[@]}]="$name"
sites[${#sites[@]}]="$site"

Quote:
Code:
done < input.txt

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