K 10
svn:author
V 8
jonathan
K 8
svn:date
V 27
2011-07-04T14:40:32.597222Z
K 7
svn:log
V 554
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

END