problem in reading inside a while loop - UNIX for Dummies Questions & Answers

ssuresh1999 · #1 (**permalink**) 4 Weeks Ago

I am not able to read inside a while though i get the message "inside read" the cursor doesnt prompt from the console

cat file | while read ln_new_engine_dirs
do
echo "inside $ln_new_engine_dirs"
if [ "$ln_new_engine_dirs" != "" ]
then
read nn
echo "inside read"
fi
done
Thanks in advance

cfajohnson · #2 (**permalink**) 4 Weeks Ago

Quote:

Originally Posted by ssuresh1999

I am not able to read inside a while though i get the message "inside read" the cursor doesnt prompt from the console

Code:

 
cat file | while read ln_new_engine_dirs
do
echo "inside $ln_new_engine_dirs"
if [ "$ln_new_engine_dirs" != "" ]
then
read nn 
echo "inside read"
fi
done

You are reading from the standard input which is coming from file. You need to read from the terminal, e.g.:
Code:
read nn < /dev/tty

ssuresh1999 · #3 (**permalink**) 4 Weeks Ago

Quote:

Originally Posted by cfajohnson

You are reading from the standard input which is coming from file. You need to read from the terminal, e.g.:
Code:
read nn < /dev/tty

Thank you very much it works

ssuresh1999 · #4 (**permalink**) 4 Weeks Ago

Thank you very much it works

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