Implementation of atomic and durable file writes:#48
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snoyberg merged 1 commit intofpco:masterfrom Jul 12, 2019
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* Durability of file writes with the help of `fsync()` syscall on the file and containing folder * Atomicity of file writes with the help of atomic renames with `rename()`, `renameat()` and `linkat()` syscalls, depending on how it was opened * Anonymous temp file utilization on Linux for atomic writes with the help of `openat()` and `O_TMPFILE` * Instead of merging this functionality into commercialhaskell/rio#167 it has been moved upstream into `unliftio` * Dropped support for ghc-7.8
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fsync()syscallrename(),renameat()andlinkat()syscallshelp of
openat()andO_TMPFILE@snoyberg The whole PR from commercialhaskell/rio#167 was transfered here almost verbatim, with an exception of some renames and haddock adjustments. The new module
UnliftIO.IO.Fileis very heavy on haddock, therefore I though it be better to have it as a separate module, rather than cramming everything intoUnliftIO.IO.CC @nh2 (Thanks for review and guidance)