Release 2.8.5.0

* allow building with newer filepath/os-string

Release 2.8.4.0

* add `haveStatx`
* fix `statx.stx_mnt_id` detection on buggy glibc, see [GHC #24072](https://gitlab.haskell.org/ghc/ghc/-/issues/24072)

Release 2.8.2.1

Release 2.8.1.1

Tag 2.7.3

Release 2.8.0.0

Notable changes:

  * Use ByteString for GroupEntry/UserEntry
  * Fix `semTrywait` on darwin
  * Fix vanishing environment variables in `System.Posix.Env.ByteString.putEnv`/`System.Posix.Env.ByteString.getEnv`
  * Add missing `setEnvironment` and `clearEnv` to `System.Posix.Env.ByteString`
  * Add support for filepath-1.4.100.0 with `PosixString` variants
  * Expose `DirStream`, `CDir`, `CDirent` and `DirStreamOffset` (internal API)
  * Add `fdRead`/`fdWrite` with ByteString payload and deprecate String based `fdRead`
  * Add `clocksPerSec`
  * Support wasm32-wasi
  * Implement BaudRate as an `Int` newtype and allow matching via extensible PatternSynonyms
  * Added `readDirStreamMaybe`
  * Warn when functions are used on unsupported platforms
  * Fix the error handling of `posix_fallocate`
  * Export `FileStatus` constructor
  * Various documentation and error message improvements
  * Add openDirStreamFd, openFileAt and createFileAt
  * Add accessors for st_blocks and st_blksize
  * Deal with FreeBSD getpwnam_r(3), ... thread safety.  On FreeBSD these
    are not in fact safe for overlapped execution with a sequence of
    getpwent(3) or getgrent(3) calls when multiple "green" threads share
    the same underlying OS thread.  The *ent(3) calls now run in bound
    threads or else locks are used to avoid overlapped execution.
  * Make passwd/group FFI functions "safe", these are not low-latency APIs.
  * Drop support for non-thread-safe getpwnam(3) and getpwuid(3).  All
    supported platforms have getpwnam_r(3) and getpwuid_r(3).  This was
    already the case for the getgr(nam|gid) calls.
  * Added terminal output flags to `System.Posix.Terminal.Common.TerminalMode`
        IXANY, ONLCR, OCRNL, ONOCR, ONLRET, OFDEL, OFILL, NLDLY(NL0,NL1),
        CRDLY(CR0,CR1,CR2,CR2), TABDLY(TAB0,TAB1,TAB2,TAB3) BSDLY(BS0,BS1),
        VTDLY(VT0,VT1), FFDLY(FF0,FF1)
  * Add support for `O_NOFOLLOW`, `O_CLOEXEC`, `O_DIRECTORY` and `O_SYNC`
    (#6, #57)
  * Refactor API of `openFd` removing `Maybe FileMode` argument,
    which now must be passed as part of `OpenFileFlags`
    (e.g. `defaultFileFlags { creat = Just mode }`)  (#58)
  * Remove deprecated `execvpe(3)` legacy-emulation CPP macro
  * Generalise return type of `exitImmediately` from `ExitCode -> IO ()` to
    `∀a. ExitCode -> IO a` (#130)
  * Add `Read`, `Show`, `Eq`, and `Ord` typeclass instances to `OpenFileFlags` and `OpenMode`. (#75, #141)

unix-2.7.2.2-r3

See http://hackage.haskell.org/package/unix-2.7.2.2/revision/3.cabal

unix 2.7.2.2

- Bundled with GHC 8.2.1
- Improve Autoconf detection of `telldir`/`seekdir` and define
  `_POSIX_VDISABLE` if missing for Android (#91,#90)
- Fix error message of `createSymbolicLink` (#84)

unix 2.7.2.1

- Don't use `readdir_r` if its deprecated.
- Add argument documentation for Env modules

unix 2.7.2.0

* Bundled with GHC 8.0.1
* Don't assume non-POSIX `WCOREDUMP(x)` macro exists
* Don't assume existence of `termios(3)` constants beyond `B38400`
* Don't assume existence of `ctermid(3)`/`tcdrain(3)`
* Change `drainOutput`'s `tcdrain(3)` into a `safe` FFI call
* Turn build error into compile warnings for exotic `struct stat`
  configurations (GHC #8859)
* Improve detection of `fdatasync(2)` (GHC #11137)
* Drop support for Hugs
* Drop support for Cygwin (and Windows in general)

unix 2.7.1.0

 * Bundled with GHC 7.10.1
 * Add support for `base-4.8.0.0`
 * Tighten `SafeHaskell` bounds for GHC 7.10+
 * Add haddock comments on `RTLD_NEXT` and `RTLD_DEFAULT`
 * Deprecate function `haveRtldLocal`
 * Fix `getGroupEntryForID/getGroupEntryForName` on Solaris. Solaris uses
   CPP macros for required `getgrgid_r` and `getgrnam_r` functions definition
   so the fix is to change from C ABI calling convention to C API calling
   convention
 * Fix potential type-mismatch in `telldir`/`seekdir` FFI imports
 * Use CAPI FFI import for `truncate` to make sure the LFS-version is used.
 * `executeFile`: Fix `ENOTDIR` error for entries with non-directory
   components in `PATH` (and instead skip over non-directory `PATH`-elements)
 * New functions in `System.Posix.Unistd`:
    - `fileSynchronise` (aka `fsync(2)`), and
    - `fileSynchroniseDataOnly` (aka `fdatasync(2)`)
 * New module `System.Posix.Fcntl` providing
    - `fileAdvise` (aka `posix_fadvise(2)`), and
    - `fileAllocate` (aka `posix_fallocate(2)`)
 * Fix SIGINFO and SIGWINCH definitions

unix 2.7.0.1

 * Handle `EROFS` and `ETXTBSY` as (non-exceptional) permission denied in `fileAccess`
 * Fix `getFileStatus` to retry `stat(2)` when it returns `EAGAIN` (this can happen on Solaris)