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    SubjectRe: RFC: disablenetwork facility. (v4)
    On Sun, Dec 27, 2009 at 05:36:48PM +0900, Tetsuo Handa wrote:

    > Application writers know better what syscalls the application will call than
    > application users.

    Aren't you forgetting about libc? Seriously, any interface along the
    lines of "pass a set of syscall numbers to kernel" is DOA:
    * syscall numbers are architecture-dependent
    * there are socketcall-style multiplexors (sys_ipc, anyone?)
    * libc is free to substitute one for another
    * libc is free to do so in arch-specific manner
    * libc is free to do so in kernel-revision-specific manner
    * libc is free to do so in libc-revision-specific manner
    (... and does all of the above)
    * new syscalls get added
    * e.g. on sparc64 32bit task can issue 64bit syscalls

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      Last update: 2009-12-27 09:53    [W:0.024 / U:9.548 seconds]
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