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Adjust sepolgen grammar to support allowxperm, et. al. #348

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Adjust sepolgen grammar to support allowxperm, et. al. #348

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Commits on Mar 30, 2022

  1. sepolgen: Update refparser to handle xperm 

    Extend the grammar to support `allowxperm`, et. al. directives, which
were added in policy version 30 to give more granular control.  This
commit adds basic support for the syntax, copying heavily from the
grammar for `allowperm`, et. al.

Signed-off-by: Chris Lindee <[email protected]>
    @ColMelvin
    ColMelvin committed Mar 30, 2022
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  2. sepolgen: Support named xperms 

    The `allowxperm` et. al. directives take a magical integer for one of
the fields, which hinders readability.  This commit adds support for
basic names for a number or group of numbers.

Notably, this does not support recursive definition of names, as that
would require a larger grammar re-write to avoid parsing conflicts.

Signed-off-by: Chris Lindee <[email protected]>
    @ColMelvin
    ColMelvin committed Mar 30, 2022
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