Nulling log files with a script

[jpor]

Hi guys,

Currently coding something together to copy and clear down log files on a monthly basis. I thought this would be simple. But I am having problems with the clearing of the original log files. Even when su to root.

Here is a copy of the script I am trying to execute:

while(1)

foreach log (/usr/cs3/master/*.log)

if(-f $log)then
cp -p $log /logs/tetralogs/oct03/;
endif

end
cd /usr/cs3/master
> *.log

When I run the script I get the following error message:

Invalid null command.

I have used the '>' before in a script without issue. Also tried using /dev/null. Anyone have any ideas ?

The files I am attemtping to cleardown are satndard text files.

 

[Annihilannic]

That might work in Korn or Bourne shell, but it looks like you're working in C shell.

Try cp /dev/null thingummy.log instead.

Also, you can't use > *.log in any shell because output can only be directed to one file, so you should do that within your foreach loop for each individual file.

Annihilannic.

 

[jpor]

Thanks Annihilannic. Yes it is a C Shell script. It's the first time I am trying my hand at it. As most of my Scripts have been written for KSH.

I have tried using the > within the foreach loop but got the same error message.

Will try the cp /dev/null approach.

 

[jpor]

Annihilannic. Yes the cp/dev/null works a treat within the loop. Thanks again.

 

[jpor]

Okay I am now using this script:

while(1)

echo " starting clean-up of /usr/cs3/master in 2 seconds "
sleep 2

foreach log (/usr/cs3/master/*.log)

if(-f $log)then
cp -p $log /logs/tetralogs/nov03/;
cp /dev/null $log
endif

end

cp -p /usr/cs3/sysmprc/system.log /logs/tetralogs/nov03/

sleep 1

cp /dev/null /usr/cs3/sysmprc/system.log

sleep 1

echo " starting clean-up of /logs in 2 seconds "
sleep 2

foreach log2 (/logs/*.log)

if(-f $log2)then
cp -p $log2 /logs/oldlogs/;
cp /dev/null $log2
endif


echo " Finished in 2 seconds"
sleep 2

But for the 'foreach log2 (/logs/*.log)' I need to be able to exclude the file servtran.log.

Any ideas.

Thanks again.

 

[theotyflos]

Hi jpor,

In your original post:
You can't use > *.log outside the loop but you can do it inside:

while(1)
    foreach log (/usr/cs3/master/*.log)
    if(-f $log)then
        cp -p $log /logs/tetralogs/oct03/;
        > $log
    endif
    end
    cd /usr/cs3/master

uses only redirection instead of loading command.

In your second post, try:

    :
    if( -f $log2 && $log2 != "/logs/servtran.log" ) then
    :

I'm not very familiar with the C shell but i think it will work

Hope it helps,
Theophilos

 

[jpor]

Thanks theotyflos. Will give that a go.