Messages in this thread |  | | Date | Tue, 9 Jan 2001 11:34:47 -0800 | From | Brian Pomerantz <> | Subject | Re: adding a system call |
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This can all be done with a device file and a corresponding module to handle the mmap and any ioctl()'s you may want to support. No need to add another system call.
BAPper
On Tue, Jan 09, 2001 at 02:17:26PM -0500, Doug McNaught wrote: > 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/ - 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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