> So the requirement for inter-process communication here is to run an > external program and receive any data that it may return?
exactly, the one and only reason
I'm looking through the GHC source distribution kit for the implementation of the Posix stuff used by POpen, with a view to possibly using that as a source of clues for implementing similar functionality (to POpen) under MS Windows, but so far I'm struggling.
I have found an implementation of popen in the GHC dustribution, in hslibs/posix (but not, apparently, in the hierachical library tree), which appears to be functionally the same as that distributed with HXML Toolbox.
I see what appears to be a forkProcess primitive implemented in a file ghc/rts/Schedule.c (but not for Windows, of course), but I don't see any corresponding Haskell source file with a corresponding declaration. I cannot find *any* reference to fdClose (another function that is used by popen).
I'm mainly looking for examples of interfacing from Haskell to low-level C code on Windows. Also useful would be sample Windows code that executes a program and captures its stdout, etc., but I guess I'm more likely to find that elsewhere.
Does anyone have any helpful pointers to offer?
#g
------------ Graham Klyne For email: http://www.ninebynine.org/#Contact
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