topic general scripting question in Operating System - Linux

general scripting question

lawrenzo_1 — Thu, 09 Aug 2007 07:46:18 GMT

Hi all,

when I run a for statement and the line contains more than one field ...

can this line be displayed as 2 fields within a variable

ie

for aa in `ls -l`
do
echo $aa
done

root
system
705381
09
Aug
13:41
sortaudit4ge.aug09
-rw-r--r--
1
root
system
33280129
09
Aug
13:41

this is just and example btw.

Thanks

Chris.

Re: general scripting question

AwadheshPandey — Thu, 09 Aug 2007 07:54:27 GMT

can u please paste the desired output.

Re: general scripting question

Sandman! — Thu, 09 Aug 2007 07:54:44 GMT

You would have to set the value of the IFS variable to some character that doesn't appear in the input stream i.e.

IFS="|"

for aa in `ls -l`
do
echo $aa
done

Re: general scripting question

Oviwan — Thu, 09 Aug 2007 08:01:12 GMT

check this:
http://www.softpanorama.org/Scripting/Shellorama/Reference/IFS.shtml

Re: general scripting question

lawrenzo_1 — Thu, 09 Aug 2007 08:05:51 GMT

just what I was looking for.

Thanks for responses and solution.

Chris.

Re: general scripting question

James R. Ferguson — Thu, 09 Aug 2007 08:07:22 GMT

Hi Chris:

When you munge the shell IFS in a script, it's good practice to do something like this:

#!/usr/bin/sh
OLDIFS=${IFS}
IFS="|"
...
...
IFS=${OLDIFS}
...

Regards!

...JRF...

BTW: the "root system" ownership looks like AIX :-))

Re: general scripting question

Dennis Handly — Thu, 09 Aug 2007 21:30:47 GMT

>when I run a for statement and the line contains more than one field ... can this line be displayed as 2 fields within a variable

You can of course use while read instead of "for i in $(); do":
ll | while read a b c; do

The delimited tokens are put in "a", "b" and the rest in "c".

You can of course pipe the output to awk and use its -F to separate tokens.

Re: general scripting question

lawrenzo_1 — Fri, 10 Aug 2007 03:11:05 GMT

Thanks again all.

Yes from the output it is AIX, I havent worked on a HP machine for 18 months now however moving jobs to a company that has 20 + HP servers ;=}

Re: general scripting question

lawrenzo_1 — Fri, 10 Aug 2007 03:11:20 GMT