#5319: MacOS X + executeFile + -threaded = "Operation not supported"
---------------------------------+------------------------------------------
Reporter: PHO | Owner:
Type: bug | Status: new
Priority: normal | Component: libraries/unix
Version: 7.0.3 | Keywords: thread, exec
Testcase: | Blockedby:
Os: MacOS X | Blocking:
Architecture: Unknown/Multiple | Failure: Incorrect result at runtime
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http://uninformed.org/index.cgi?v=1&a=1&p=16
http://lists.apple.com/archives/cocoa-dev/2005/Oct/msg00836.html
Mac OS X has an undocumented behavior concerning 'execve(2)' inside a
threaded process. If a process tries to call 'execve(2)' and has more
than one native thread, the kernel returns 'EOPNOTSUPP'. This prevents
'executeFile' from working when the threaded runtime is used.
{{{
% ghci
GHCi, version 7.0.3: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package ffi-1.0 ... linking ... done.
Prelude> System.Posix.Process.executeFile "/bin/sh" False [] Nothing
Loading package unix-2.4.2.0 ... linking ... done.
*** Exception: /bin/sh: executeFile: failed (Operation not supported)
Prelude>
Leaving GHCi.
% uname
Darwin
}}}
To work around this, we have to 'fork(2)' before calling 'execve(2)',
to make sure there is only a single active thread.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5319>
GHC <http://www.haskell.org/ghc/>
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