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Within LTS Haskell 24.52 (ghc-9.10.3)
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unix System.Posix.Files.PosixString Group has read permission.
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unix System.Posix.Files.PosixString Others have read permission.
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unix System.Posix.Files.PosixString Owner has read permission.
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unix System.Posix.IO O_NONBLOCK
fdRead :: Fd -> ByteCount -> IO (String, ByteCount)unix System.Posix.IO Deprecated: This function is scheduled to be dropped in favor of fdRead, because decoding e.g. UTF-8 streams partially is unsafe.
fdReadBuf :: Fd -> Ptr Word8 -> ByteCount -> IO ByteCountunix System.Posix.IO Read data from an Fd into memory. This is exactly equivalent to the POSIX read function.
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unix System.Posix.IO.ByteString O_NONBLOCK
fdRead :: Fd -> ByteCount -> IO ByteStringunix System.Posix.IO.ByteString Read data from an Fd and return it as a ByteString. Throws an exception if this is an invalid descriptor, or EOF has been reached.
fdReadBuf :: Fd -> Ptr Word8 -> ByteCount -> IO ByteCountunix System.Posix.IO.ByteString Read data from an Fd into memory. This is exactly equivalent to the POSIX read function.
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unix System.Posix.IO.PosixString O_NONBLOCK