- // just block waiting for the child to exit
- int status = 0;
-
- int result = waitpid(execData.pid, &status, 0);
-#ifdef __DARWIN__
- /* DE: waitpid manpage states that waitpid can fail with EINTR
- if the call is interrupted by a caught signal. I suppose
- that means that this ought to be a while loop.
-
- The odd thing is that it seems to fail EVERY time. It fails
- with a quickly exiting process (e.g. echo), and fails with a
- slowly exiting process (e.g. sleep 2) but clearly after
- having waited for the child to exit. Maybe it's a bug in
- my particular version.
-
- It works, however, from the CFSocket callback without this
- trick but in that case it's used only after CFSocket calls
- the callback and with the WNOHANG flag which would seem to
- preclude it from being interrupted or at least make it much
- less likely since it would not then be waiting.
-
- If Darwin's man page is to be believed then this is definitely
- necessary. It's just weird that I've never seen it before
- and apparently no one else has either or you'd think they'd
- have reported it by now. Perhaps blocking the GUI while
- waiting for a child process to exit is simply not that common.
- */
- if ( result == -1 && errno == EINTR )
- {
- result = waitpid(execData.pid, &status, 0);
- }
-#endif // __DARWIN__
+ if ( fd )
+ disp.RegisterFD(fd, this, wxFDIO_INPUT);
+ }
+
+ virtual void OnWriteWaiting() { wxFAIL_MSG("unreachable"); }
+ virtual void OnExceptionWaiting() { wxFAIL_MSG("unreachable"); }
+
+protected:
+ const int m_fd;
+
+ DECLARE_NO_COPY_CLASS(wxReadFDIOHandler)
+};
+
+// class for monitoring our end of the process detection pipe, simply sets a
+// flag when input on the pipe (which must be due to EOF) is detected
+class wxEndHandler : public wxReadFDIOHandler
+{
+public:
+ wxEndHandler(wxFDIODispatcher& disp, int fd)
+ : wxReadFDIOHandler(disp, fd)
+ {
+ m_terminated = false;
+ }
+
+ bool Terminated() const { return m_terminated; }
+
+ virtual void OnReadWaiting() { m_terminated = true; }
+
+private:
+ bool m_terminated;
+
+ DECLARE_NO_COPY_CLASS(wxEndHandler)
+};
+
+#if wxUSE_STREAMS
+
+// class for monitoring our ends of child stdout/err, should be constructed
+// with the FD and stream from wxExecuteData and will do nothing if they're
+// invalid
+//
+// unlike wxEndHandler this class registers itself with the provided dispatcher
+class wxRedirectedIOHandler : public wxReadFDIOHandler
+{
+public:
+ wxRedirectedIOHandler(wxFDIODispatcher& disp,
+ int fd,
+ wxStreamTempInputBuffer *buf)
+ : wxReadFDIOHandler(disp, fd),
+ m_buf(buf)
+ {
+ }
+
+ virtual void OnReadWaiting()
+ {
+ m_buf->Update();
+ }
+
+private:
+ wxStreamTempInputBuffer * const m_buf;
+
+ DECLARE_NO_COPY_CLASS(wxRedirectedIOHandler)
+};
projects / wxWidgets.git / blobdiff