topic Re: If Then Else Help in Operating System - HP-UX

If Then Else Help

J.Kimbrell — Tue, 31 May 2011 17:31:00 GMT

Hello All,
I have a script that isn't working and being a noob at this, I need the help of experts.
Below is the script;

#!/bin/sh
MSGTXT="`omnistat |awk '{print $1,$2,$3}'"
echo $MSGTXT
if [$MSGTXT="No currently running"]
then
omnisv stop
sleep 30
cp -p /opt/omni/* /destination
cp -p /var/opt/omni/* /destination
cp -p /etc/opt/omni/* /destination
omnisv start
echo IT WORKS
else
echo SESSION OPEN
fi

Thanks.
J.

Re: If Then Else Help

James R. Ferguson — Tue, 31 May 2011 17:45:25 GMT

Hi:

The second line is mangled. You need matching back-ticks or better yet:

MSGTXT=$(omnistat|awk '{print $1,$2,$3}')

The notation '$( ... )' is modern POSIX syntax or the archaic back-ticks. Both forms execute the enclosed command(s) and collect the output.

Regards!

...JRF...

Re: If Then Else Help

J.Kimbrell — Tue, 31 May 2011 17:52:28 GMT

Thank You Sir, So it should look like;

#!/bin/sh
MSGTXT=$(omnistat|awk '{print $1,$2,$3}')
:echo $MSGTXT
if [$MSGTXT="No currently running"]
then
omnisv stop
sleep 30
cp -p /opt/omni/* /destination
cp -p /var/opt/omni/* /destination
cp -p /etc/opt/omni/* /destination
omnisv start
echo IT WORKS
else
echo SESSION OPEN
fi

Re: If Then Else Help

James R. Ferguson — Tue, 31 May 2011 17:58:56 GMT

Hi (again):

> So it should look like;

Well, drop the colon before the word 'echo'. You can do a half-decent syntax check with:

# sh -n filename

...where 'filename' is whatever you call your script. If no output appears, then the script is syntactically correct as far as the shell can determine.

Regards!

...JRF..

Re: If Then Else Help

Michael Mike Reaser — Tue, 31 May 2011 18:21:59 GMT

One last thing as a Maybe-Just-In-Case. Change the line

if [$MSGTXT="No currently running"]

to be

if [ "$MSGTXT" = "No currently running" ]

Close to a quarter-century of experience with HP's shells have taught me to be Very Very Careful when doing string comparisons, so I'm quite liberal with the use of double-quotes to delimit all character strings inside my scripts.

Re: If Then Else Help

J.Kimbrell — Tue, 31 May 2011 18:25:40 GMT

Nice thanks, Don't know where the colon came from, but nontheless, it's not there.
I did the sh -n with no errors, however, I keep getting the "SESSION OPEN" even though there isn't any open.

Any ideas?
J.

Re: If Then Else Help

J.Kimbrell — Tue, 31 May 2011 18:33:06 GMT

# ./BkupScript
IT WORKS

Thanks all!