Printing as another user

[Michael De Vlaminck]

> > Michael De Vlaminck wrote:
> > >> Michael De Vlaminck wrote:
> > >>> Hello,
> > >>>
> > >>> Is there a way to disable the -U option from /usr/bin/lpr?
> > >>> Because I'm setting up a printing system using CUPS. We also need an accountingsystem (we have pykota fot that) but the problem is that we can't trust the username that pykota recieves because of the -U option from lpr.
> > >> You can enable authentication (so that users need to provide a
> > >> password), or edit the source code to remove the -U option.  However,
> > >> the latter change will not prevent users from writing a CUPS-based
> > >> program that submits a job with an alternate username.
> > >
> > > When I enable authentication, is the password that the user needs to provide the same as the user needs to login to our systems? Or is it a completely different userdatabase?
> >
> > Normally, yes, however some Linux distributions (SuSE in particular)
> > use the Digest (lppasswd) authentication option instead, which means
> > you'll need to setup separate passwords for every user.
> >
> > Also, CUPS uses PAM on platforms that support it, so you can
> > authenticate against accounts in the /etc/passwd file, LDAP accounts,
> > Kerberos, etc. (however, note that we don't support Kerberos
> > authentication via SPNEGO yet, so users will need to provide their
> > password - no single sign-on support yet...)
>
> I enabled authentication and it works, but it seems that everytime I have to enter my password twice when printing. Is this normal?
>
> thx
> Michael De Vlaminck

Is it also possible that you must only provide a password when you try to print as another user? So that when I'm logged in as (for example) michael and try to print something that I don't have to give a password since I'm allready logged in.
But when I try to print as user michael with a -U option with another username I have to give the password for that user.

thx
Michael De Vlaminck