topic Re: Scripting question: retaining spaces when looping read/echo statements in Operating System - HP-UX

Scripting question: retaining spaces when looping read/echo statements

John J Read — Tue, 07 Oct 2003 11:49:25 GMT

Hoping someone can help. I am attempting to write a simple loop that will echo or print the following 3 fields. The problem I am having is that "echo" and "print" both seem to treat consecutive spaces as one space. I'm used to using awk -F" " but as you can see the first field sometimes has spaces which is why I'm trying to use cut with character lengths.

Input file contains:
GA30494 0000 Y john_j_read@aul.com
GA620870220022 Y john_j_read@aul.com

My loop:
cat extfile |while read line
do
CONTRACT=`echo $line |cut -c 1-20`
ACT=`echo $line |cut -c 21`
SENDTO=`echo $line |cut -c 22-82`
echo "${CONTRACT}" "${ACT}" "${SENDTO}"
done
GA30494 0000 Y john_ j _read@aul.com
GA620870220022 Y joh n _j_read@aul.com

Notice that "cat" and cut are not the problem:

#cat extfile |cut -c 1-20
GA30494 0000
GA620870220022

#cat extfile |cut -c 21
Y
Y

#cat extfile |cut -c 22-82
john_j_read@aul.com
john_j_read@aul.com

Thanks! I'm willing to entertain other language options such as Perl!

Re: Scripting question: retaining spaces when looping read/echo statements

James Specht — Tue, 07 Oct 2003 11:54:45 GMT

change your echo to printf

printf "%s20 %1s %60s\n",$CONTRACT,$ACT,$SENDTO

Should do the trick.

--Jim

Re: Scripting question: retaining spaces when looping read/echo statements

John J Read — Tue, 07 Oct 2003 11:59:28 GMT

Dag nabit! It looks like this forum page also treats consective spaces as one space. It looked good when I cut/pasted it in but is collapsed it.

In the above post, the input file should look like:

Field 1 is colums 1-20
Field 2 is column 21
Field 3 is colums 22-82

GA30494 0000 Y john_j_read@aul.com
GA620870220022 Y john_j_read@aul.com

Re: Scripting question: retaining spaces when looping read/echo statements

Dietmar Konermann — Tue, 07 Oct 2003 12:06:34 GMT

Try to pass the strings as ONE arg to echo. E.g. echo "$line" with quotes.

Re: Scripting question: retaining spaces when looping read/echo statements

John J Read — Tue, 07 Oct 2003 12:16:50 GMT

Thanks! I was working out the new printf lines when I saw Dietmar's post.

I'll give you both 10's!

Looks like putting quotes around $line is the easiest answer for me!

It worked! Thanks very much!!!

cat extfile |while read line
do
CONTRACT=`echo "$line" |cut -c 1-20`
ACT=`echo "$line" |cut -c 21`
SENDTO=`echo "$line" |cut -c 22-82`

echo "${CONTRACT}" "${ACT}" "${SENDTO}"
done

Re: Scripting question: retaining spaces when looping read/echo statements

Eric Buckner — Tue, 07 Oct 2003 13:03:35 GMT

It looks like you have a good solution. I just wanted to add that you might try to typeset your variables as well.

typeset -L20 CONTRACT
typeset -L60 SENDTO

That would left justify and pad on the right w/ whitespace out to 20 or 60 respectively. There is also the R equivalent as well.