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#ifdef __GLASGOW_HASKELL__
{-# LANGUAGE Trustworthy #-}
#endif
module System.Posix.Process.Internals (
pPrPr_disableITimers, c_execvpe,
decipherWaitStatus, ProcessStatus(..) ) where
import Foreign
import Foreign.C
import System.Exit
import System.IO.Error
import GHC.Conc (Signal)
data ProcessStatus = Exited ExitCode
| Terminated Signal
| Stopped Signal
deriving (Eq, Ord, Show)
-- this function disables the itimer, which would otherwise cause confusing
-- signals to be sent to the new process.
foreign import ccall unsafe "pPrPr_disableITimers"
pPrPr_disableITimers :: IO ()
foreign import ccall unsafe "execvpe"
c_execvpe :: CString -> Ptr CString -> Ptr CString -> IO CInt
decipherWaitStatus :: CInt -> IO ProcessStatus
decipherWaitStatus wstat =
if c_WIFEXITED wstat /= 0
then do
let exitstatus = c_WEXITSTATUS wstat
if exitstatus == 0
then return (Exited ExitSuccess)
else return (Exited (ExitFailure (fromIntegral exitstatus)))
else do
if c_WIFSIGNALED wstat /= 0
then do
let termsig = c_WTERMSIG wstat
return (Terminated termsig)
else do
if c_WIFSTOPPED wstat /= 0
then do
let stopsig = c_WSTOPSIG wstat
return (Stopped stopsig)
else do
ioError (mkIOError illegalOperationErrorType
"waitStatus" Nothing Nothing)
foreign import ccall unsafe "__hsunix_wifexited"
c_WIFEXITED :: CInt -> CInt
foreign import ccall unsafe "__hsunix_wexitstatus"
c_WEXITSTATUS :: CInt -> CInt
foreign import ccall unsafe "__hsunix_wifsignaled"
c_WIFSIGNALED :: CInt -> CInt
foreign import ccall unsafe "__hsunix_wtermsig"
c_WTERMSIG :: CInt -> CInt
foreign import ccall unsafe "__hsunix_wifstopped"
c_WIFSTOPPED :: CInt -> CInt
foreign import ccall unsafe "__hsunix_wstopsig"
c_WSTOPSIG :: CInt -> CInt
|
