[Haskell-cafe] lockFile: fd out of range

Simon Marlow simonmar at microsoft.com
Wed Oct 26 05:04:42 EDT 2005

On 25 October 2005 17:02, Joel Reymont wrote:

> Is there a set limit on the number of file descriptors that a Haskell
> program can open?
> I'm using hs-plugins on FreeBSD to transparently compile, load and
> launch scripts that establish a connection to a server. I'm getting
> this error:
> internal error: lockFile: fd out of range
> Please report this as a bug to glasgow-haskell-bugs at haskell.org,
> or http://www.sourceforge.net/projects/ghc/

lockFile uses FD_SETSIZE as its idea of the maximum value of a file
descriptor.  If you can get file descriptors outside this range, then
the above error would ensue.  Not sure if this is the case on FreeBSD...
seems odd if it is.  Can you try a truss/ktrace and see the values of
your file descriptors?


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