topic Suppress ps -ef command line args in Operating System - HP-UX

Suppress ps -ef command line args

Purusa — Mon, 24 Apr 2006 05:38:24 GMT

Hi,

Guys I have been coming back to you after a long gap.
The issue I am currently facing is as follows:

Process A is talking to Process B. A invokes B(executable) by providing some arguments. Process A is a unix script. Now, if I do "ps -ef" during communication between 2 processes, I can see the command line arguments being passed by A to B.

I need to hide these arguments from the user. Let me know if there is a workaround to suppress these arguments from appearing in the output of ps -ef or any command.

Thanks & Regards,
Pankaj

Re: Suppress ps -ef command line args

Pete Randall — Mon, 24 Apr 2006 05:41:24 GMT

Could Process A output the arguments to a file that would then be read by Process B?

Pete

Re: Suppress ps -ef command line args

Peter Godron — Mon, 24 Apr 2006 05:44:05 GMT

Pankaj,
use a file for process A to wtite the parameters, then let process B read that file.

Re: Suppress ps -ef command line args

Purusa — Mon, 24 Apr 2006 05:47:50 GMT

Hi Pete/Peter,

Thanks for your response.

That seems to be a good option, however I have some constraints regarding executable B. It is presently reading the parameters from command line and I can't change its design.

Waiting for something more on this...

Thanks and regards,
Pankaj

Re: Suppress ps -ef command line args

Bill Hassell — Mon, 24 Apr 2006 06:09:26 GMT

There is no way to change the behavior of ps -- it will report the up to 60 characters (longer if -x is used) from the command line. The only solution is to create a wrapper, a short script that is named ps and parses the output to rfemove the arguments. This could get quite complicated if options like -H and -o are invoked by the user. If the target script/program requires secured parameters, it should be a priority to rewrite the code to accept the values from a file.

Re: Suppress ps -ef command line args

Ivan Ferreira — Mon, 24 Apr 2006 08:50:18 GMT

This would be my suggestion.

Create a new user, named for example ps.

Create a new group for this user, called for example ps.

Now you get a user named ps in a group named ps.

Change the owner and permissions of the ps command:

chmod 550 /bin/ps
chown ps:ps /bin/ps

Add the users that you want to normally use ps in the "ps" group.

Install sudo.

Create a script that runs the ps command with the output filtered/modified. Call this script /bin/secps

Configure your sudoers file to allow the execution of the secps command as user "ps". Using sudo, disallow the use of parameters for that command, like this:

USERLIST ALL = (ps) NOPASSWD: /bin/secps

Then the users only can run the command with sudo.

Re: Suppress ps -ef command line args

Greg Vaidman — Mon, 24 Apr 2006 11:55:08 GMT

Try the process described here: http://www.uaex.edu/srea/#Hiding_Passwords_From_UNIX_ps_Command

You'll have to rename your "B" to "B.hide", compile the C program, and name the new program "B".

The original purpose of the program was to hide passwords passed on the command-line when calling Oracle sqplus commands, but it should work with any program.