read line and read next - UNIX for Dummies Questions & Answers

ariuscy · #1 09-20-2005

hi,

there is a text like this in text.txt

DETAILS (
USERID,
USERNM
)

how to find the 'DETAILS (' and start to read next line until meet the char ')', when read next line i need to put the 'USERID' into a variable name to be use later

thanks a lot ...please help

reborg · #2 09-20-2005

Well what have you tried so far?

ariuscy · #3 09-20-2005

below is what i tried so far, any good idea
hasDetail='FALSE'
exec 4<$1
while read eachline <&4
do

if [ "$eachline" == ")" ]
then
hasDetail='FALSE'
fi
if [ "$hasDetail" == "TRUE" ]
then
varnm=`echo $eachline | cut -f1 -d,`
repnm=P`echo $varnm | cut -c 2-`
sed 's/$varnm/$repnm/g' $1 > $1.$$
sed 's/$repnm/$repnm/g' $1.$$> $1
fi
if [ "$eachline" == "DETAIL (" ]
then
hasDetail='TRUE'
fi
done

RishiPahuja · #4 09-20-2005

Quote:

Originally Posted by ariuscy

below is what i tried so far, any good idea
hasDetail='FALSE'
exec 4<$1
while read eachline <&4
do

if [ "$eachline" == ")" ]
then
hasDetail='FALSE'
fi
if [ "$hasDetail" == "TRUE" ]
then
varnm=`echo $eachline | cut -f1 -d,`
repnm=P`echo $varnm | cut -c 2-`
sed 's/$varnm/$repnm/g' $1 > $1.$$
sed 's/$repnm/$repnm/g' $1.$$> $1
fi
if [ "$eachline" == "DETAIL (" ]
then
hasDetail='TRUE'
fi
done

Change the place of

Code:

if [ "$eachline" == "DETAIL (" ] 
	then 
		hasDetail='TRUE'
	fi

This should be the first check to be done.

I dont find the approach you are using reliable, it will fail in the scenario where the data file has unmatched ")"

rishi

vino · #5 09-20-2005

If you are looking to extract only USERID check this out.

Code:

sh-2.05b$ echo "DETAILS (
USERID,
USERNM
)" | sed  -n -e '/DETAILS.*/{
n
s#\(.*\)\,#\1#p
}'

It will extract and give out USERID

vino

rishchand · #6 09-21-2005

j=0;
foreach $curline (<FILE NAME>)
{

if j=0
{
next if($cur_line !~ /DETAILS$/);
j=1;
next;
}

if($cur_line !~ /$/);
{
.
. put your logic here...
.
}
else
{
exit 1
}

matrixmadhan · #7 09-21-2005

one more way ...

echo "DETAILS (
USERID,
USERNM
)" | sed -ne 's/,$//p'

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