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Claim ยท cairn 0.5.2
cairn^911 writeFile is atomic, and replies done only when the bytes are there
An assumption of cairn 0.5.2.
- Id
cairn^911- Kind
- assume
- Reads as
- assumed
- Version
- 0.5.2
What it says
writeFile answers done only when the file then holds exactly the bytes, creating missing directories; a reader alongside sees the old bytes or the new ones, never a mix; a failed write leaves the old file unchanged; a path that can't name a file is invalid.
Evidence
| assumed | Stated, not proved. The proofs rely on it. | |
| fuzzed | Not shown yet: the trusted-base fuzzer's check effects.write-file held. A CI step will publish it (#95). | |
Where it's defined
- Declaration
Cairn.Fuzz.Trusted.Claims.hostWriteFile- Module
Cairn.Fuzz.Trusted.Claims- Source
lean/Cairn/Fuzz/Trusted/Claims.lean:56atv0.5.2- Statement hash
-
Ledger
cairn^911 is active in this version's claims.lock. An id never moves or changes meaning.