topic Re: Please help! in Operating System - HP-UX

Please help!

Vande Matram — Sat, 22 Jun 2002 13:35:54 GMT

Hi guys!
This is probably the easiest question you have been asked...but I am just starting out in UNIX shell scripting and need your help with while loop.
What I want to do is say,
while not end of file filename
if .......
then ......
elif ......
then ......
fi
end
Can you please tell me the exact syntax of how to accomplish the above task? I am having rough time with this. Thank you so much guys!

Re: Please help!

A. Clay Stephenson — Sat, 22 Jun 2002 14:07:09 GMT

This should get you started:

FILENAME=myfile

cat ${FILENAME} | while read X
do
if [ "${X}" = "Me" ]
then
echo "Yes"
else
echo "${X}"
fi
done

Re: Please help!

Vande Matram — Sat, 22 Jun 2002 14:10:52 GMT

:-) aaaah....finally! Thank you so much! You've been a great help! I will try your approach.

Re: Please help!

Steve Post — Mon, 24 Jun 2002 11:11:08 GMT

here is another way (that looks weird).

exec 3while read X 0<3&
do
echo $X
done
3<&-

The X variable here is a line from the file, instead of a word.

So to be each line, each word.....
exec 3while read XLINE 0<3&
do
echo "line $XLINE"
for XWORD in $XLINE
do
echo "word $XWORD"
done
done
3<&-

hope it helps. Steve ^_^