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Description | |||||||||
Miscellaneous information about the system environment. | |||||||||
Synopsis | |||||||||
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Documentation | |||||||||
getArgs :: IO [String] | |||||||||
Computation getArgs returns a list of the program's command line arguments (not including the program name). | |||||||||
getProgName :: IO String | |||||||||
Computation getProgName returns the name of the program as it was invoked. However, this is hard-to-impossible to implement on some non-Unix OSes, so instead, for maximum portability, we just return the leafname of the program as invoked. Even then there are some differences between platforms: on Windows, for example, a program invoked as foo is probably really FOO.EXE, and that is what getProgName will return. | |||||||||
getEnv :: String -> IO String | |||||||||
Computation getEnv var returns the value of the environment variable var. This computation may fail with:
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withArgs :: [String] -> IO a -> IO a | |||||||||
withArgs args act - while executing action act, have getArgs return args. | |||||||||
withProgName :: String -> IO a -> IO a | |||||||||
withProgName name act - while executing action act, have getProgName return name. | |||||||||
Produced by Haddock version 0.6 |