[Mac-emacs-devel] Subprocess Bug Fix

[Andrew C. <ak...@cs...>]

Hi Everyone!

With the patch emacs-21.1-2-mac.patch.gz for building Emacs 21.1 on
Mac OS X, you should be experiencing problems with subprocesses not
completely returning all their output.

Please try the following patches for the files src/process.c and
src/s/darwin.h.

Andrew.
-----
--- emacs-21.1/src/process.c	Tue Sep 25 16:21:22 2001
+++ emacs/src/process.c	Tue Dec  4 09:03:31 2001
@@ -2512,6 +2512,14 @@
       if (update_tick != process_tick && do_display)
 	{
 	  Atemp = input_wait_mask;
+#ifdef MAC_OSX
+	  /* On Mac OS X, the SELECT system call always says input is
+	     present (for reading) at stdin, even when none is.  This
+	     causes the the call to SELECT below to return 1 and
+	     status_notify not to be called.  As a result output of
+	     subprocesses are incorrectly discarded.  */
+	  FD_CLR (0, &Atemp);
+#endif
 	  EMACS_SET_SECS_USECS (timeout, 0, 0);
 	  if ((select (max (max_process_desc, max_keyboard_desc) + 1,
 		       &Atemp, (SELECT_TYPE *)0, (SELECT_TYPE *)0,

--- emacs-21.1.30/src/s/darwin.h	Sat Jun 30 23:21:19 2001
+++ emacs/src/s/darwin.h	Wed Dec  5 12:06:47 2001
@@ -76,7 +76,7 @@
    to read the input and send it to the true Emacs process
    through a pipe. */
 
-#define INTERRUPT_INPUT 1
+#define INTERRUPT_INPUT
 
 /* Letter to use in finding device name of first pty,
   if system supports pty's.  'a' means it is /dev/ptya0  */
@@ -103,7 +103,7 @@
  *	Define HAVE_PTYS if the system supports pty devices.
  */
 
-#define HAVE_PTYS
+/* #define HAVE_PTYS */
 
 /*
  *	Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate