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| System.Posix.Unistd | | Portability | non-portable (requires POSIX) | | Stability | provisional | | Maintainer | libraries@haskell.org |
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| Description |
| POSIX miscellaneous stuff, mostly from unistd.h
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| Synopsis |
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| System environment
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| data SystemID |
| Constructors | | SystemID | | | systemName :: String | | | nodeName :: String | | | release :: String | | | version :: String | | | machine :: String | |
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| getSystemID :: IO SystemID |
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| data SysVar |
| Constructors | | ArgumentLimit | | | ChildLimit | | | ClockTick | | | GroupLimit | | | OpenFileLimit | | | PosixVersion | | | HasSavedIDs | | | HasJobControl | |
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| getSysVar :: SysVar -> IO Integer |
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| Sleeping
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| sleep :: Int -> IO Int |
Sleep for the specified duration (in seconds). Returns the time remaining
(if the sleep was interrupted by a signal, for example).
GHC Note: the comment for usleep also applies here.
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| usleep :: Int -> IO () |
Sleep for the specified duration (in microseconds).
GHC Note: threadDelay is a better choice.
Without the -threaded option, usleep will block all other user
threads. Even with the -threaded option, usleep requires a
full OS thread to itself. threadDelay has
neither of these shortcomings.
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| nanosleep :: Integer -> IO () |
| Sleep for the specified duration (in nanoseconds)
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| Produced by Haddock version 0.8 |
