topic Re: Keeping PS1 same in Operating System - HP-UX

Keeping PS1 same

Shivkumar — Mon, 02 Mar 2009 19:26:58 GMT

Hello,

I am using PS1 environment variable in .profile to see servername and my home directories etc.

export PS1="$(uname -n)@$(whoami)\$PWD>"

But when i execute PowerBroker command to su to different user then this PS1 setting gets lost.

Is there a way to retain it even if i change to different user ?

Thanks,
Shiv

Re: Keeping PS1 same

James R. Ferguson — Mon, 02 Mar 2009 19:37:29 GMT

Hi Shiv:

> But when i execute PowerBroker command to su to different user then this PS1 setting gets lost. Is there a way to retain it even if i change to different user ?

If you 'su - username' then you are sourcing the user's profile. This is going to reset or set its own PS1 environmental variable.

If you 'su username' _without_ the dash (hyphen) then 'su' does _not_ source the target user's profile, leaving your current environment unchanged.

See the 'su' manpages for more information.

Regards!

...JRF...

Re: Keeping PS1 same

Shivkumar — Mon, 02 Mar 2009 19:49:56 GMT

In our PowerBroker setup looks like
'su-username' is mandatory. I just tried and it is not taking without "-".

Re: Keeping PS1 same

Michael Mike Reaser — Mon, 02 Mar 2009 19:55:56 GMT

Shiv:> In our PowerBroker setup looks like
'su - username' is mandatory. I just tried and it is not taking without "-".

If this is the case, then your PS1 value will be reset to whatever value the .profile and other login scripts for 'username' use for PS1. You cannot use the "-" for a login shell while *not* having the login scripts executed. The use of "-" on su will force PS1 to be changed if the other user's login scripts change it, period.

Re: Keeping PS1 same

James R. Ferguson — Mon, 02 Mar 2009 19:57:07 GMT

Hi Shiv:

> In our PowerBroker setup looks like
'su-username' is mandatory. I just tried and it is not taking without "-".

You need to find out what environmental variables are needed in the target environment; place them in a stand-alone file; and source (read) them once you have switched users.

Regards!

...JRF...

Re: Keeping PS1 same

Dennis Handly — Tue, 03 Mar 2009 04:01:18 GMT

>JRF: You need to find out what environmental variables are needed in the target

Or the reverse, find out what sets PS1 and source that after you use PowerBroker.

For me, my PS1 is always "$ ". I have a pushd/popd functions that puts the directory path in the window title.

Re: Keeping PS1 same

Avinash20 — Tue, 03 Mar 2009 05:12:29 GMT

Please add this variable in /etc/profile and make sure that PS1 variable is not defined in .profile of users.

This above setting will be set for all the users.

First /etc/profile executes and then .profile of user. Hence whatever defined in .profile will override variables defined in /etc/profile