while using read command I want too.....


 
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# 1  
Old 08-08-2002
while using read command I want too.....

This is the greatest site ever, only my second day of use and the responses and advice I got from yesterdays question were great..

Now for todays question,

I have a file that I want to read one line at a time into a script i've written. Once I have read the line I would like to update it (in the same file) so that it has READ at the beginning of the line (so it can be easliy deleted later without removing unread lines).
Can this be easliy done in ksh on HPUX?

Any advice would be great.....
Smilie Smilie
# 2  
Old 08-08-2002
The problem here is that you can't insert data into a file. You must write a new file with the insertions made. So you can do this:
Code:
#! /usr/bin/ksh
exec < inputfile
exec > tempfile
while read line ; do
      echo READ "$line"
done

mv inputfile oldinputfile
mv tempfile inputfile
exit 0

But I don't see the point. The script is going to read every line anyway.
 
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