Darcs.Util.Workaround

Documentation

setExecutable :: FilePath -> Bool -> IO ()

getCurrentDirectory :: IO FilePath

Obtain the current working directory as an absolute path.

In a multithreaded program, the current working directory is a global state shared among all threads of the process. Therefore, when performing filesystem operations from multiple threads, it is highly recommended to use absolute rather than relative paths (see: makeAbsolute).

The operation may fail with:

• HardwareFault A physical I/O error has occurred. [EIO]
• isDoesNotExistError or NoSuchThing There is no path referring to the working directory. [EPERM, ENOENT, ESTALE...]
• isPermissionError or PermissionDenied The process has insufficient privileges to perform the operation. [EACCES]
• ResourceExhausted Insufficient resources are available to perform the operation.
• UnsupportedOperation The operating system has no notion of current working directory.

installHandler

Arguments

:: Signal

-> Handler

-> Maybe SignalSet

other signals to block

-> IO Handler

old handler

installHandler int handler iset calls sigaction to install an interrupt handler for signal int. If handler is Default, SIG_DFL is installed; if handler is Ignore, SIG_IGN is installed; if handler is Catch action, a handler is installed which will invoke action in a new thread when (or shortly after) the signal is received. If iset is Just s, then the sa_mask of the sigaction structure is set to s; otherwise it is cleared. The previously installed signal handler for int is returned

raiseSignal :: Signal -> IO ()

raiseSignal int calls kill to signal the current process with interrupt signal int.

data Handler

The actions to perform when a signal is received.

Constructors

Default

Ignore

Catch (IO ())

CatchOnce (IO ())

CatchInfo (SignalInfo -> IO ())

Since: unix-2.7.0.0

CatchInfoOnce (SignalInfo -> IO ())

Since: unix-2.7.0.0

type Signal = CInt

sigINT :: CInt

sigHUP :: CInt

sigABRT :: CInt

sigALRM :: CInt

sigTERM :: CInt

sigPIPE :: CInt