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On Tue, 24 Feb 2004, Kris Thielemans wrote:
I was trying to use Windows XP's 'switch user' feature and get rather amazing results. Here is what I did
- logged in as account 1 (has admin privs), started XFree there (using startxwin.bat) - switched to another user ('limited privs'), started Xfree there (using startxwin.bat)
I get error messages relating to /tmp/.X11-unix (permission denied). If you check startxwin.bat, this is indeed a problem. Every user/session will use the same filename. my 2nd user does not have permission to mess around with the /tmp/.X11-unix created by the first user, so it has problems.
Maybe this can be fixed by using /tmp/$USER/.X11-unix or so. But maybe you do not want it to be fixed (see below).
However, now comes the weird thing. I then switched back to account 1. And it has a new Xterm open, which seems to be owned by user 2 (that is 'id -un' reports user 2)! I did not really check if it has all relevant permissions and so on but it's pretty scary anyway!
-------------------------- REM Startup the X Server with the integrated Windows-based window manager.
Do you think user switching could be supported by XFree? (Don't worry if you say no. It's not a life-saving requirement for me!)
This is normal behaviour. X11 communication work either via TCP/IP where the xserver uses port 6000+display number or via unix domain sockets where the xserver uses the file /tmp/.X11-unix/X${display number}.
If you want to start another xserver as a different user you have to supply a screen number different from those of all started servers.
eg. if the first server was started with XWin -options then the second should be started with XWin :1 -options
bye ago
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