about the login screen in linux
 

I am a developer in linux. Now I am trying to create own login screen and authentication. Actually my login screen should come first and after that only the gdm login screen should appear. I have created my login screen using gtk+. I have redhat linux 9(shrike) and kernel version is 2.4.20-6smp. My default runlevel is 5. I am trying this for past one week but i am not getting the my login screen first when linux boots up. Please help me in this.

Depending on when you want to lauch it, but basically, you probably need all the widgets. So, you need a premium window manager. What you can check is the gdm init script... I can't really help about when it is appropriate to execute your program but it must be somewhere quite late (to get X) but not too much (before gdm).

To test that, you should go to runlevel 3, alterate the gdm script and go back to runlevel 5. (By the way, I forgot this command).