UNIX for Advanced & Expert Users

I am putting a shell script in cron of root for solaris 7 server . This shell script runs rsh
commands within the script. The result is the shell script does not run in cron. The cron syntax is perfect.

When I run stand alone manually it works fine.I undesrstand I need to initialize everything in cron and nothing should be taken for granted in cron . However I don't know what should I set for rsh command .

For more information the remote server is solaris 8.

Please guide.

I assume that have created a shell script in a file somewhere and you put the name of that file into cron. Is that the case? Literally putting the script into crontab is hard and frequently results in errors.

Are there any error messages in /var/cron/log?

Really you should do a:
exec > /tmp/some.log.file 2>&1
very early in the script to catch the error messages.

Yes u r right. I have put in the shell script location in the cron ditto.

I understand we can do so however all scripts which creates environment the user (root in this case) also have to be put in cron.

I think u mean following command to be placed in my cron

exec my_shell_script > log.file 2 > &1 .

Correct me if wrong . My knowledge of cron and exec is poor .

No, I mean what I said. Put the line I gave inside the shell script. Near the top. Don't add stuff to it. Now when you run the shell script the output will go to the file you specify.

Then in crontab, just put the name of the script.

Post the script. And post the crontab line.

Did you check cron's logs?

Here is the shell script duplicate which we put in solaris 7 server' cron. This script calls 3 script (2 on remote server) and 1 on local server . 2 remote server script started with rsh are also included here.

I am yet to try ur suggestion exec . I'll try that. Further I also checked the PATH and SHELL variable are not defined correctly in cron. PATH does not have /usr/sbin . I am yet to test defining this variables in the script.

The shell script duplicate works perfectly when run manually.

So I think I have to do testing of your suggestion andmy findings regarding environment variables.

Here are the scripts.

***************duplicate **************
name=$1
rsh jewelex1 "/home/vishal/scrp/takesnap $name"

mkdir /snap$name
mount -F nfs -o ro jewelex1:/snap$name /snap$name
if grep snap$name /etc/mnttab >/dev/null ;then
echo " Snap$name mounted Successfully! "
su tbase -c "/home1/tbase/snapcmp $name"
umount /snap$name;
else
echo " Snap$name not mount on `hostname` Server only! ";
fi
rm -r /snap$name
rsh jewelex1 "/home/vishal/scrp/rmsnap $name"

echo "Duplication Completed!"
**************script rmsnap *************8
name=$1
if fssnap -i |grep $name >/dev/null ;then
echo "Snapshoot on $name present.Please wait as it is Removed First"
unshare /snap$name
if grep snap$name /etc/mnttab >/dev/null ;then
echo "Snapshoot on $name Being UNMounted "
umount /snap$name
if grep snap$name /etc/mnttab >/dev/null ;then
echo "Unmounting of Snapshoot on $name not possible!***"
exit;
else
fssnap -d /$name;
fi
else
fssnap -d /$name;
fi
rm -r /snap$name;
rm -r /arch/bs$name;
fi
************script takesnap***************

name=$1
/home/vishal/scrp/rmsnap $name
if fssnap -i |grep $name >/dev/null ;then
echo "Snapshoot on $name still present.Please Remove it First"
exit;
else
echo "Snapshoot on $name Being Taken.Please Wait!"
mkdir /snap$name
mkdir /arch/bs$name
fssnap -F ufs -o bs=/arch/bs$name /$name
sno=`fssnap -i|grep $name |awk '{print $1}'`
echo "Snapshoot No $sno on $name Being Mounted.Please Wait!"
mount -F ufs -o ro /dev/fssnap/$sno /snap$name
if grep snap$name /etc/mnttab >/dev/null ;then
echo "*********Snapshoot No $sno on $name Mounted Successfully**
*****"
echo "Snapshoot No $sno on $name Being Shared"
share -F nfs -o ro /snap$name /snap$name;
else
echo "Snapshoot No $sno on $name Could not be Mounted";
fi
fi

Here is one trick that I use to debug stuff like this....

Type
env - /usr/bin/ksh

This will start up an instance of ksh with nothing at all in the environment. (ksh will then add a couple of things.) Then try your script manually. This way you can see how it works with no environment variables set.

It is working now . I noticed 2 variables were not set . I set the same and tested. It's working now.

BTW , thanks a lot for ur help.