Haskell Hierarchical Libraries (base package) Contents Index

System.Posix.Signals Portability non-portable (requires POSIX) Stability provisional Maintainer libraries@haskell.org

Contents The Signal type Specific signals Sending signals Handling signals Signal sets The process signal mask The alarm timer Waiting for signals The NOCLDSTOP flag

Description

POSIX signal support

Synopsis

type Signal = CInt nullSignal :: Signal internalAbort :: Signal sigABRT :: CInt realTimeAlarm :: Signal sigALRM :: CInt busError :: Signal sigBUS :: CInt processStatusChanged :: Signal sigCHLD :: CInt continueProcess :: Signal sigCONT :: CInt floatingPointException :: Signal sigFPE :: CInt lostConnection :: Signal sigHUP :: CInt illegalInstruction :: Signal sigILL :: CInt keyboardSignal :: Signal sigINT :: CInt killProcess :: Signal sigKILL :: CInt openEndedPipe :: Signal sigPIPE :: CInt keyboardTermination :: Signal sigQUIT :: CInt segmentationViolation :: Signal sigSEGV :: CInt softwareStop :: Signal sigSTOP :: CInt softwareTermination :: Signal sigTERM :: CInt keyboardStop :: Signal sigTSTP :: CInt backgroundRead :: Signal sigTTIN :: CInt backgroundWrite :: Signal sigTTOU :: CInt userDefinedSignal1 :: Signal sigUSR1 :: CInt userDefinedSignal2 :: Signal sigUSR2 :: CInt pollableEvent :: Signal sigPOLL :: CInt profilingTimerExpired :: Signal sigPROF :: CInt badSystemCall :: Signal sigSYS :: CInt breakpointTrap :: Signal sigTRAP :: CInt urgentDataAvailable :: Signal sigURG :: CInt virtualTimerExpired :: Signal sigVTALRM :: CInt cpuTimeLimitExceeded :: Signal sigXCPU :: CInt fileSizeLimitExceeded :: Signal sigXFSZ :: CInt raiseSignal :: Signal -> IO () signalProcess :: Signal -> ProcessID -> IO () signalProcessGroup :: Signal -> ProcessGroupID -> IO () data Handler = Default | Ignore | Catch (IO ()) | CatchOnce (IO ()) installHandler :: Signal -> Handler -> Maybe SignalSet -> IO Handler data SignalSet emptySignalSet :: SignalSet fullSignalSet :: SignalSet addSignal :: Signal -> SignalSet -> SignalSet deleteSignal :: Signal -> SignalSet -> SignalSet inSignalSet :: Signal -> SignalSet -> Bool getSignalMask :: IO SignalSet setSignalMask :: SignalSet -> IO () blockSignals :: SignalSet -> IO () unblockSignals :: SignalSet -> IO () scheduleAlarm :: Int -> IO Int getPendingSignals :: IO SignalSet awaitSignal :: Maybe SignalSet -> IO () setStoppedChildFlag :: Bool -> IO Bool queryStoppedChildFlag :: IO Bool

The Signal type

type Signal = CInt

Specific signals

nullSignal :: Signal

internalAbort :: Signal

sigABRT :: CInt

realTimeAlarm :: Signal

sigALRM :: CInt

busError :: Signal

sigBUS :: CInt

processStatusChanged :: Signal

sigCHLD :: CInt

continueProcess :: Signal

sigCONT :: CInt

floatingPointException :: Signal

sigFPE :: CInt

lostConnection :: Signal

sigHUP :: CInt

illegalInstruction :: Signal

sigILL :: CInt

keyboardSignal :: Signal

sigINT :: CInt

killProcess :: Signal

sigKILL :: CInt

openEndedPipe :: Signal

sigPIPE :: CInt

keyboardTermination :: Signal

sigQUIT :: CInt

segmentationViolation :: Signal

sigSEGV :: CInt

softwareStop :: Signal

sigSTOP :: CInt

softwareTermination :: Signal

sigTERM :: CInt

keyboardStop :: Signal

sigTSTP :: CInt

backgroundRead :: Signal

sigTTIN :: CInt

backgroundWrite :: Signal

sigTTOU :: CInt

userDefinedSignal1 :: Signal

sigUSR1 :: CInt

userDefinedSignal2 :: Signal

sigUSR2 :: CInt

pollableEvent :: Signal

sigPOLL :: CInt

profilingTimerExpired :: Signal

sigPROF :: CInt

badSystemCall :: Signal

sigSYS :: CInt

breakpointTrap :: Signal

sigTRAP :: CInt

urgentDataAvailable :: Signal

sigURG :: CInt

virtualTimerExpired :: Signal

sigVTALRM :: CInt

cpuTimeLimitExceeded :: Signal

sigXCPU :: CInt

fileSizeLimitExceeded :: Signal

sigXFSZ :: CInt

Sending signals

raiseSignal :: Signal -> IO ()

signalProcess :: Signal -> ProcessID -> IO ()

signalProcessGroup :: Signal -> ProcessGroupID -> IO ()

Handling signals

data Handler

Constructors Default Ignore Catch (IO ()) CatchOnce (IO ())

installHandler :: Signal -> Handler -> Maybe SignalSet -> IO Handler

Signal sets

data SignalSet

emptySignalSet :: SignalSet

fullSignalSet :: SignalSet

addSignal :: Signal -> SignalSet -> SignalSet

deleteSignal :: Signal -> SignalSet -> SignalSet

inSignalSet :: Signal -> SignalSet -> Bool

The process signal mask

getSignalMask :: IO SignalSet

setSignalMask :: SignalSet -> IO ()

blockSignals :: SignalSet -> IO ()

unblockSignals :: SignalSet -> IO ()

The alarm timer

scheduleAlarm :: Int -> IO Int

Waiting for signals

getPendingSignals :: IO SignalSet

awaitSignal :: Maybe SignalSet -> IO ()

The NOCLDSTOP flag

setStoppedChildFlag :: Bool -> IO Bool

Tells the system whether or not to set the SA_NOCLDSTOP flag when installing new signal handlers.

queryStoppedChildFlag :: IO Bool

Queries the current state of the stopped child flag.

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