At 11:43 17/03/04 +0000, Ross Paterson wrote:
On Wed, Mar 17, 2004 at 10:47:59AM +0000, Graham Klyne wrote:
So this (alone) is not enough. I did also try using "a" and "ab", but no joy there, either. This starts to point to some interaction between the I/O library and Windows anonymous pipe. My C code (which works as expected) uses the _write function (equiv. Unix "write") directly on the returned file descriptor.
Can you try fdopen+fwrite in your C code?
Ah, yes.... All relevant source code is here: http://www.ninebynine.org/Software/HaskellUtils/Win32/ The revised calling program is here: http://www.ninebynine.org/Software/HaskellUtils/Win32/FdSpawnEchoShiftLetter... The result from running the revised code is this: [[ D:\Dev\HaskellUtils\Win32>FdSpawnEchoShiftLetters Characters written: 26 Characters read from sout: 26 Data: 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' Characters read from serr: 43 Data: 'EchoShiftLetters: 26 characters processed. ' FdSpawnEchoShiftLetters: finished. D:\Dev\HaskellUtils\Win32> ]] That is, it works fine. I tried this using "w" and "w+" access modes. Both worked OK. #g ------------ Graham Klyne For email: http://www.ninebynine.org/#Contact