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How to trap who is running a script and log it?

Posted on 2011-02-14
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Last Modified: 2012-05-11
Hello,

I have a script that can be executed by processes or users on our AIX box, the script contains the following:

#!/bin/sh
DLC=${DLC-/usr1/dlc};export DLC
PROSHUT=${PROSHUT-$DLC/bin/_mprshut}
trap "" 13
exec $PROSHUT "$@"

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How can I edit the above code so that it traps which process or user is running the script and log it to a file? Would there be something I can add to the code in the original file?

Thanks.
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Question by:mirde
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8 Comments
 
LVL 40

Expert Comment

by:omarfarid
ID: 34889969
you can add line at the beginning of the script

username >> /path/to/logfile

the file logfile should be writable by all users
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LVL 1

Expert Comment

by:ltost
ID: 34890000
Sure, just put something like this into it:
echo `date`  `whoami` >> /tmp/spy.out

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That will log the user with a timestamp to the file /tmp/spy.out
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LVL 68

Accepted Solution

by:
woolmilkporc earned 1000 total points
ID: 34890200
Hi,

the drawback of the above solutions is that the logfile must be writeable by all users, so all users can manipulate it.

I'd suggest using syslog.

Add a line to /etc/syslog.conf like:

local3.info /var/adm/local3.log

Then issue:

touch  /var/adm/local3.log
and
refresh -s syslogd

Now add to your script:

logger -t "$0" -p local3.info "Run by user $(whoami) with PID $$ on $(hostname)"

Take care that your script itself is not writeable by anybody but root.

wmp

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LVL 80

Expert Comment

by:arnold
ID: 34891889
There are many options.
Is this an SUID script.
0
 
LVL 68

Expert Comment

by:woolmilkporc
ID: 34892000
AIX does not support SUID scripts.
0
 
LVL 48

Expert Comment

by:Tintin
ID: 34894391
There are almost no *nix versions that support SUID scripts.

woolmilkporc's solution is the best as you can restrict the permissions on the log file.
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LVL 80

Expert Comment

by:arnold
ID: 34897027
You could have each user append data to a <username> named file and have a process that monitors this directory that would take the data and add it into a file that the users/processes  have no access to.
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Author Closing Comment

by:mirde
ID: 34967106
worked like a charm
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