Specification of the UNIX Filing System, Carroll Morgan and Bernard Sufrin
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- April 1984
- IEEE Transactions on Software Engineering SE-10(2):128 - 142
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- IEEE Xplore
Abstract
A
specification of the UNIX filing system is given using a notation based
on elementary mathematical set theory. The notation used involves very
few special constructs of its own. The specification is detailed enough
to capture the filing system's behavior at the system call level, yet
abstracts from issues of data representation, whether in programs or on
the storage medium, and from the description of any algorithms which
might be used to implement the system. The presentation of the
specification is in several stages, each new stage building on its
predecessors; major concepts are introduced separately so that they may
be easily understood. The notation used allows these separate stages to
be joined together to give a complete description of each filing system
operation-including its error conditions. Features of the specification
notation are explained as they are used, and the Appendix gives the
definitions of the symbols drawn from set theory.
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