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  • #5319

Closed
Open
Opened Jul 13, 2011 by PHO@PHO

MacOS X + executeFile + -threaded = "Operation not supported"

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.

Trac metadata
Trac field Value
Version 7.0.3
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component libraries/unix
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
Assignee
Assign to
7.4.1
Milestone
7.4.1
Assign milestone
Time tracking
None
Due date
None
Reference: ghc/ghc#5319