On 27.01.2012 12:54, Weeble wrote:
I have a program that uses System.IO.Pipes.AnonymousPipe{Server,Client}Stream on .NET to communicate between a parent and child process while still allowing the child process to use stdin, stdout and stderr normally. I've found that this part of System.IO.Pipes isn't implemented in Mono. From what I can tell, it shouldn't be especially hard to implement these classes themselves, but the critical problem would be that Process.Start explicitly closes all open file descriptors (except for stdin, stdout and stderr). The relevant code is here, in CreateProcess in processes.c:https://github.com/mono/mono/blob/master/mono/io-layer/processes.c#L988 Because of that, I believe any working implementation of System.IO.Pipes.Anonymous* would require changes to CreateProcess. Either: 1. Remove entirely the loop that closes file descriptors.
This is out of question. For example, you don't want to share sockets.
2. Maintain a process-wide table of all file descriptors associated with the client-end of an AnonymousPipeServerStream, pass it into CreateProcess and skip closing of those file descriptors.
This is the way to go. The Win32 pipe functions must be simulated by the io-layer similarly to the other I/O functions. This way you'd know which handles to duplicate/inherit. Robert _______________________________________________ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
