On Sun, 23 Dec 2012 01:05:35 -0800 (PST), Jack Mc Lauren wrote:
> Hi all
> Please take a look at the script below wich I've wrote :
> 1- cat /foo/bar.txt | while read $LINE12- do3- cat /foo/bar/foo/bar.txt |
> while read $LINE24- do 5- if [ "$LINE1" = "$LINE2" ]; then6-
> sw="1"7- echo "Current value of sw is : " $sw8-
> break9- fi10- done11- echo "Value of sw is : " $sw12-
> if [ "$sw" = "0" ]; then13- DO SOMETHING14- fi15- sw="0"16-
> done
This is totally distorted! Allow me to re-arrange it.
cat /foo/bar.txt | while read $LINE1
do
cat /foo/bar/foo/bar.txt | while read $LINE2
do
if [ "$LINE1" = "$LINE2" ]; then
sw="1"
echo "Current value of sw is : " $sw
break
fi
done
echo "Value of sw is : " $sw
if [ "$sw" = "0" ]; then
DO SOMETHING
fi
sw="0"
done
First, the lines with "read" have to be:
cat /foo/bar.txt | while read $LINE1
cat /foo/bar/foo/bar.txt | while read $LINE2
Reason: $LINE1 and $LINE2 will be evaluated here, they are "empty
string", causing "read" to throw an error.
> You probebly guessed what I want to do. But the problem is that
> when the value of sw sets to 1 (in the first if statement) and
> the loop breaks , the value of sw is not '1' anymore in
> " echo "Value of sw is : " $sw " !!!
> Thanks in advance ...
For testing, I've replaced the $sw=0 line with an "echo" command.
I've created two files foo.txt and bar.txt for test, both have
one line in common (3rd line in my example data). If I run the
script, I get this output:
Value of sw is : <- after 1st line (uninitialized)
Value of sw is : 0 <- after 2nd line
DO SOMETHING!
Current value of sw is : 1 <- after 3nd line (common entry)
Value of sw is : 0 <- after 4th line
DO SOMETHING!
Value of sw is : 0 <- after 5th line
DO SOMETHING!
It seems that the condition $LINE1=$LINE2 properly triggers
the "current value" echo command, while all non-common lines
trigger the "DO SOMETHING" action.
If you indended something else, please elaborate.
--
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...
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