* dtable.cc (POSIX_NAMED_PIPE): New define.

(POSIX_NAMED_PIPE_LEN): Ditto.
(dtable::add_archetype): Use crealloc_abort.
(dtable::init_std_file_from_handle): Specifically detect pipe stdin/stdout.
Pass name to build_fh_dev so that proper name is recorded.  Use binmode of fh
if it is set before using get_default_mode.  Set proper read/write access when
calling init().
(handle_to_fn): Handle pipes.
* fhandler.cc (fhandler_base::wait_overlapped): Add some debugging.
* fhandler.h (fhandler_base::set_name): Default to just setting the path_conv
name.
(fhandler_pipe::init): Declare.
* pipe.cc (struct pipesync): New struct.
(getov_result): New function.  Blocks and retrieves the result of an overlay
I/O operation.
(pipe_handler): New function.
(pipesync::pipesync): New function.  Initializer for pipesync struct.
(handler_pipe::init): Define.  Detects attempts to set up a "native" pipe
fhandler and creates a thread which accepts input from or output to the
non-cygwin pipe, creating a cygwin pipe wrapper around the non-cygwin pipe.
(fhandler_pipe::create): Add pipe-specific flags to call to init().
* exceptions.cc (ctrl_c_handler): Lock process while we determine what to do.

winsup/cygwin/fhandler.h

@@ -149,6 +149,7 @@ class fhandler_base
   path_conv pc;
 
   virtual void set_name (path_conv &pc);
+  virtual void set_name (const char *s) {pc.set_normalized_path (s, false);}
   int error () const {return pc.error;}
   void set_error (int error) {pc.error = error;}
   bool exists () const {return pc.exists ();}
@@ -546,6 +547,7 @@ public:
   int __stdcall fadvise (_off64_t, _off64_t, int) __attribute__ ((regparm (3)));
   int __stdcall ftruncate (_off64_t, bool) __attribute__ ((regparm (3)));
   int ready_for_read (int fd, DWORD howlong);
+  void init (HANDLE, DWORD, mode_t);
   static int create (fhandler_pipe *[2], unsigned, int);
   static int create_selectable (LPSECURITY_ATTRIBUTES, HANDLE&, HANDLE&, DWORD);
 };