topic Re: echo asterisk in Operating System - HP-UX

echo asterisk

panchpan — Mon, 16 Aug 2010 18:00:06 GMT

$cat /tmp/tuxob.lst
udi *****
jim 10
ant 19
ibm *****
input=`head -1 /tmp/tuxob.lst | awk '{print $NF}'`

If above is the script, then how do I put if conditions. i.e. If $input = '*****' do something. Because on putting $input displays files of current directory being expanded to echo *

Re: echo asterisk

Peter Nikitka — Mon, 16 Aug 2010 18:20:59 GMT

Hi,

first:
- no need for command head
- no need for command echo
You get your - doubtful - info by
awk '$NF == "*****" {print $NF;exit}' /tmp/tuxob.lst

I try to guess, what you want:
if a line has ****** as the second column, do 'something' with the first.
As an example, I check the name for existence in the NIS database in calling 'ypmatch passwd'.

awk '$NF == "*****" {cmd="ypmatch "$1" passwd"; system(cmd)}' /tmp/tuxob.lst

mfG Peter

Re: echo asterisk

panchpan — Mon, 16 Aug 2010 18:28:02 GMT

Thanks Peter.
I have this code:
status | awk '{print $1 " " $3}' > /tmp/tuxob.lst
lines=`wc -l /tmp/tuxob.lst`
i=1
while [ $i -le $lines ]
do
input=`head -${i} /tmp/tuxob.lst | tail -1`
obup=`echo $input | awk '{print $2}'`
srcName=`echo $input | awk '{print $1}'`
if [ "$obup" = '*****' ]
then
echo "srcName is down"
fi
i=`expr $i + 1`
done

The file /tmp/tuxob.lst contains:
udi *****
jim 10
ant 19
ibm *****

and as an output I want to display udi and ibm.

Please advise.

Re: echo asterisk

Peter Nikitka — Mon, 16 Aug 2010 19:29:00 GMT

Ok,

let's look, if I understood the 'status' command and your script correctly! Try:

status | awk '$3 == "*****" {print $1,"is down"}'

I feel no need for a temporary file, but if you insist:
status | awk '$3 == "*****" {print $1,"is down"}
{print $1,$3 >"/tmp/tuxob.lst"}'

mfG Peter

Re: echo asterisk

Elmar P. Kolkman — Tue, 17 Aug 2010 05:04:36 GMT

Your script can be easily rewritten in shell to this:

status | awk '{print $1 " " $3}' > /tmp/tuxob.lst

cat /tmp/tuxob.lst | while read obup srcName
do
if [ "$obup" = '*****' ]
then
echo "srcName $srcName is down"
fi
done

Or:
grep ' [*][*]*$' /tmp/tuxob.lst | cut -f1
to do just what you want, display only the lines containing the '*****' at the end.
And there are lots of other solutions too.

Re: echo asterisk

James R. Ferguson — Wed, 08 Sep 2010 13:08:12 GMT

Hi:

As a general comment, if you want to prevent file name generation, disable it with 'set -f'.

For example, compare:

# cd /tmp; echo *

...with:

# cd /tmp; set -f; echo *; set +f

Regards!

...JRF...