Hi Nils, thanks for your answer. Le mercredi 20 Octobre 2004 11:32, Nils Philippsen a écrit : > So is it a client or a server application? Perhaps I need to tell more about this application: this is an IDE for the developpement of Microchip PIC based applications. This IDE also can program chip devices through serial or paralell ports programmers. http://pikdev.free.fr/ So, logged user need to access to the serial/paralell ports in RW mode. We should consider that is a client application. > If it's a client application, > all users who want to use it must have the permissions, either by > belonging to a special group or /etc/security/console.perms trickeries. Create a special group doesn't seem to me a good idea because if a new user is added after the package installation, he won't belong to the new group and administrator will need to add him manually. I prefer a solution where all users can use the application by default. So, using /etc/security/console.perms seems the best way. Here is my purposal: # device classes <serialport>=/dev/ttyS[0-9] <paralellport>=/dev/parport[0-7] # permission definitions <console> 0600 <serialport> 0660 root.uucp <console> 0600 <paralellport> 0660 root.lp Does it seem right for you? How can I add/remove these lines via rpm (un)installation? > If it's a server application, you could let it be run by e.g. the > "myserverapp" user (with an exemplary uid/gid of 450 -- I don't know > whom you should ask to get a fixed well known one assigned for FC) which > would get added/removed like this in packages: > > %post > # Don't fail if user/group already exist > groupadd -g 450 myserverapp || : > useradd -u 450 -g 450 -G uucp,lp myserverapp -d /usr/lib/myserverapp || : > > %postun > if [ "$1" = "0" ]; then > userdel -r myserverapp || : > groupdel -r myserverapp || : > fi " || : " is the way to don't fail? Regards. -- Alain PORTAL -- Service Commun de Microscopie Électronique Université de Montpellier II -- Case Courrier 087 Place Eugène Bataillon -- 34095 Montpellier Cedex 05 Tél. : 04 67 14 37 35 -- Fax. : 04 67 14 37 37 NO WORD ATTACHMENTS: http://www.fsf.org/philosophy/no-word-attachments.fr.html http://www.giromini.org/usenet-fr/repondre.html