On Fri, Aug 12, 2005 at 10:22:24PM +0200, Pierre Habouzit wrote: > Le Ven 12 Août 2005 22:18, Roberto C. Sanchez a écrit : > > to wich /dev/??? entry does the program speaks to ? if it's video (e.g.) > then the normal user of a box is supposed to be in the video group, and > setuid is not required.
Here is what Nicolas (the upsrteam author) said: You should note that there is a suid app installed (ddcpci), this is required because ddccontrol needs to read/write directly to the PCI memory, because there is no I2C support for Intel IGPs in the kernel and nVidia I2C support conflicts with the 3D-accelerated proprietary drivers. Every suid app could be a security problem (the code is very simple so I don't think so, but we never know .-)). It speaks to /dev/i2c-* when possible and then PCI memory in the case of Intel video, as Nicolas described. -Roberto -- Roberto C. Sanchez http://familiasanchez.net/~roberto
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