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From: Jonathan Anderson <jonathan@FreeBSD.org>
Date: Mon, 4 Jul 2011 14:40:32 +0000 (UTC)
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Subject: cvs commit: src/sys/kern sys_capability.c src/sys/sys capability.h
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jonathan    2011-07-04 14:40:32 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             sys_capability.c 
    sys/sys              capability.h 
  Log:
  SVN rev 223762 on 2011-07-04 14:40:32Z by jonathan
  
  Add kernel functions to unwrap capabilities.
  
  cap_funwrap() and cap_funwrap_mmap() unwrap capabilities, exposing the
  underlying object. Attempting to unwrap a capability with an inadequate
  rights mask (e.g. calling cap_funwrap(fp, CAP_WRITE | CAP_MMAP, &result)
  on a capability whose rights mask is CAP_READ | CAP_MMAP) will result in
  ENOTCAPABLE.
  
  Unwrapping a non-capability is effectively a no-op.
  
  These functions will be used by Capsicum-aware versions of _fget(), etc.
  
  Approved by: mentor (rwatson), re (Capsicum blanket)
  Sponsored by: Google Inc
  
  Revision  Changes    Path
  1.5       +122 -0    src/sys/kern/sys_capability.c
  1.16      +40 -0     src/sys/sys/capability.h