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Message
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| hilltops |
 Posted: Thu Mar 09, 2006 6:29 am Post subject: Problem with dspmq in shell script |
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Centurion
Joined: 01 Mar 2006
Posts: 112
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Has anyone had to write a shell script to capture running queue managers on a linux machine, and then perform some logic basic on the queue manager names, as given below?
#!/bin/bash
set -x
touch hellotesting1
files="$(ls -1)"
qmgrs="$(dspmq | grep -i running | cut -d "(" -f2 | cut -d ")" -f1)"
echo "queue managers $qmgrs"
for q in $qmgrs
do
touch hellotesting.$q
done
My problem is that when I run this script manually it works OK, but when it is configured to be run from cron, the for loop doesn't get evaluated. Is there a problem with the way dspmq returns?
Thankx |
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| xxx |
| Posted: Thu Mar 09, 2006 6:48 am Post subject: |
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Centurion
Joined: 13 Oct 2003
Posts: 137
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| just give the full path in corn for all the executables |
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| hilltops |
| Posted: Thu Mar 09, 2006 6:55 am Post subject: |
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Centurion
Joined: 01 Mar 2006
Posts: 112
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Don't quite understand your suggestion to give the full path in cron. By the way I forgot to mention how it is called from cron. cron is configure in the following way
* * * * * ~mqm/qmgrs/tester > /dev/null 2>&1
where tester contains the code given above. |
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| jefflowrey |
| Posted: Thu Mar 09, 2006 6:58 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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xxx meant that you should replace "dspmq" with "/usr/mqm/bin/dspmq" or wherever dspmq is on your system.
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I am *not* the model of the modern major general. |
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| hilltops |
| Posted: Thu Mar 09, 2006 7:17 am Post subject: |
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Centurion
Joined: 01 Mar 2006
Posts: 112
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I have now got the line
qmgrs="$(/usr/bin/dspmq | /bin/grep -i running | /usr/bin/cut -d "(" -f2 | /usr/bin/cut -d ")" -f1)"
in place, but i still get the same result, ie the for loop does't get evaluated.
Tanx |
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| wschutz |
| Posted: Thu Mar 09, 2006 7:32 am Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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if it were me....I'd echo the output of dspmq and start debugging from there.....[/quote]
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-wayne |
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| hilltops |
| Posted: Thu Mar 09, 2006 7:58 am Post subject: |
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Centurion
Joined: 01 Mar 2006
Posts: 112
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With a bare minimum script such as the following and with echoing into the testing file, I get nothing in the qmgrs variable when run via cron.
#!/bin/bash
set -x
qmgrs="$(/usr/bin/dspmq)"
echo "queue managers $qmgrs" >> testing
for q in $qmgrs
do
touch hellotesting.$q
done |
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| tkane |
| Posted: Thu Mar 09, 2006 9:07 am Post subject: |
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Voyager
Joined: 23 Dec 2002
Posts: 82
Location: Kansas City
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Try something more in your crontab. Here's what I have for my 5.3 system:
| Code: |
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=mqm
HOME=/home/mqsupt/mqm
LD_ASSUME_KERNEL=2.4.19
00 22 * * 0 /var/mqm/scripts/saveqmgr > /dev/null 2>&1
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Tom |
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| hilltops |
| Posted: Thu Mar 09, 2006 9:40 am Post subject: |
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Centurion
Joined: 01 Mar 2006
Posts: 112
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Thank Tom,
I have now got it working. I added the LD_ASSUME_KERNEL=2.4.19 in the crontab file, so it now looks like;
LD_ASSUME_KERNEL=2.4.19
* * * * * ~mqm/qmgrs/tester > /dev/null 2>&1
Many thankx |
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| jefflowrey |
| Posted: Thu Mar 09, 2006 11:56 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Ah! A new thing I learned today. I didn't know you could treat crontab as a shell script like that, to set environment variables.
I'd have left crontab alone, and added the variables to the tester.sh script, myself - because then it's explicit what tester.sh needs, rather than implicit.
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I am *not* the model of the modern major general. |
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| euphoria |
| Posted: Thu Mar 09, 2006 2:32 pm Post subject: |
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Acolyte
Joined: 08 Feb 2004
Posts: 51
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New thing to me as well.
If you set environment variables in crontab, would they apply for all the cron entries (following the variables) or just the one immediately below ? |
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| wschutz |
| Posted: Thu Mar 09, 2006 4:45 pm Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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might that be just GNU?
| Quote: |
| Environment variables can be set in the crontab. In BSD or ATT, the environment handed to child processes is basically the one from /etc/rc. |
_________________
-wayne |
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| jefflowrey |
| Posted: Thu Mar 09, 2006 5:18 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| wschutz wrote: |
| might that be just GNU? |
Are you trying to say that it's Not Unix?
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| wschutz |
| Posted: Thu Mar 09, 2006 5:20 pm Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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sorry Jeff... I meant to say: GNU's Not UNIX
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-wayne |
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