fixed IO redirection to work in wxExecute() in console applications (including the case when the child process outputs more than pipe buffer size) by using wxSelectDispatcher for multiplexing

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@52692 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/unix/execute.h

@@ -40,9 +40,22 @@ struct wxExecuteData
 #if wxUSE_STREAMS
         bufOut =
         bufErr = NULL;
+
+        fdOut =
+        fdErr = wxPipe::INVALID_FD;
 #endif // wxUSE_STREAMS
     }
 
+    // get the FD corresponding to the read end of the process end detection
+    // pipe and close the write one
+    int GetEndProcReadFD()
+    {
+        const int fd = pipeEndProcDetect.Detach(wxPipe::Read);
+        pipeEndProcDetect.Close();
+        return fd;
+    }
+
+
     // wxExecute() flags
     int flags;
 
@@ -60,6 +73,10 @@ struct wxExecuteData
     // called bufOut and not bufIn
     wxStreamTempInputBuffer *bufOut,
                             *bufErr;
+
+    // the corresponding FDs, -1 if not redirected
+    int fdOut,
+        fdErr;
 #endif // wxUSE_STREAMS
 };