Messages in this thread |  | | Subject | Re: adding a system call | From | Doug McNaught <> | Date | 09 Jan 2001 14:17:26 -0500 |
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Mihai Moise <mcartoaj@mat.ulaval.ca> writes:
> My system call idea is to allow a superuser process to request a mmap on > behalf of an user process. To see how this would be useful, let us consider > svgalib.
[...]
> With my new system call, a superuser process can set the graphics mode in a > safe manner and then ask for an mmap of the video array into the application > data segment.
Ummm, couldn't the the root process open the video device, then pass the file descriptor (via AF_UNIX socket) to the user process? The user process would then call mmap() on the open file descriptor.
I'm not *completely* sure this would work, but it would avoid creating a new system call if so.
-Doug - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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