From bf351cc2bead795586b5c4a47ee2146712d7eb79 Mon Sep 17 00:00:00 2001
From: Karl Heuer <kwzh@gnu.org>
Date: Thu, 18 May 1995 16:54:42 +0000
Subject: [PATCH] (status_notify): If Vprocess_alist changes within the loop,
 do the whole loop again.

---
 src/process.c | 145 ++++++++++++++++++++++++++------------------------
 1 file changed, 75 insertions(+), 70 deletions(-)

diff --git a/src/process.c b/src/process.c
index 119ed47c749..cedcb38fa8a 100644
--- a/src/process.c
+++ b/src/process.c
@@ -3386,6 +3386,7 @@ status_notify ()
   register Lisp_Object proc, buffer;
   Lisp_Object tail, msg;
   struct gcpro gcpro1, gcpro2;
+  Lisp_Object old_process_alist;
 
   tail = Qnil;
   msg = Qnil;
@@ -3395,87 +3396,91 @@ status_notify ()
      reference.  */
   GCPRO2 (tail, msg);
 
-  for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail))
+  do
     {
-      Lisp_Object symbol;
-      register struct Lisp_Process *p;
-
-      proc = Fcdr (Fcar (tail));
-      p = XPROCESS (proc);
-
-      if (XINT (p->tick) != XINT (p->update_tick))
+      old_process_alist = Vprocess_alist;
+      for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail))
 	{
-	  XSETINT (p->update_tick, XINT (p->tick));
+	  Lisp_Object symbol;
+	  register struct Lisp_Process *p;
 
-	  /* If process is still active, read any output that remains.  */
-	  if (XINT (p->infd) >= 0)
-	    while (! EQ (p->filter, Qt)
-		   && read_process_output (proc, XINT (p->infd)) > 0);
+	  proc = Fcdr (Fcar (tail));
+	  p = XPROCESS (proc);
 
-	  buffer = p->buffer;
+	  if (XINT (p->tick) != XINT (p->update_tick))
+	    {
+	      XSETINT (p->update_tick, XINT (p->tick));
 
-	  /* Get the text to use for the message.  */
-	  if (!NILP (p->raw_status_low))
-	    update_status (p);
-	  msg = status_message (p->status);
+	      /* If process is still active, read any output that remains.  */
+	      if (XINT (p->infd) >= 0)
+		while (! EQ (p->filter, Qt)
+		       && read_process_output (proc, XINT (p->infd)) > 0);
 
-	  /* If process is terminated, deactivate it or delete it.  */
-	  symbol = p->status;
-	  if (CONSP (p->status))
-	    symbol = XCONS (p->status)->car;
+	      buffer = p->buffer;
 
-	  if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)
-	      || EQ (symbol, Qclosed))
-	    {
-	      if (delete_exited_processes)
-		remove_process (proc);
-	      else
-		deactivate_process (proc);
-	    }
+	      /* Get the text to use for the message.  */
+	      if (!NILP (p->raw_status_low))
+		update_status (p);
+	      msg = status_message (p->status);
 
-	  /* Now output the message suitably.  */
-	  if (!NILP (p->sentinel))
-	    exec_sentinel (proc, msg);
-	  /* Don't bother with a message in the buffer
-	     when a process becomes runnable.  */
-	  else if (!EQ (symbol, Qrun) && !NILP (buffer))
-	    {
-	      Lisp_Object ro, tem;
-	      struct buffer *old = current_buffer;
-	      int opoint;
-
-	      ro = XBUFFER (buffer)->read_only;
+	      /* If process is terminated, deactivate it or delete it.  */
+	      symbol = p->status;
+	      if (CONSP (p->status))
+		symbol = XCONS (p->status)->car;
 
-	      /* Avoid error if buffer is deleted
-		 (probably that's why the process is dead, too) */
-	      if (NILP (XBUFFER (buffer)->name))
-		continue;
-	      Fset_buffer (buffer);
-	      opoint = point;
-	      /* Insert new output into buffer
-		 at the current end-of-output marker,
-		 thus preserving logical ordering of input and output.  */
-	      if (XMARKER (p->mark)->buffer)
-		SET_PT (marker_position (p->mark));
-	      else
-		SET_PT (ZV);
-	      if (point <= opoint)
-		opoint += XSTRING (msg)->size + XSTRING (p->name)->size + 10;
-
-	      tem = current_buffer->read_only;
-	      current_buffer->read_only = Qnil;
-	      insert_string ("\nProcess ");
-	      Finsert (1, &p->name);
-	      insert_string (" ");
-	      Finsert (1, &msg);
-	      current_buffer->read_only = tem;
-	      Fset_marker (p->mark, make_number (point), p->buffer);
+	      if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)
+		  || EQ (symbol, Qclosed))
+		{
+		  if (delete_exited_processes)
+		    remove_process (proc);
+		  else
+		    deactivate_process (proc);
+		}
 
-	      SET_PT (opoint);
-	      set_buffer_internal (old);
+	      /* Now output the message suitably.  */
+	      if (!NILP (p->sentinel))
+		exec_sentinel (proc, msg);
+	      /* Don't bother with a message in the buffer
+		 when a process becomes runnable.  */
+	      else if (!EQ (symbol, Qrun) && !NILP (buffer))
+		{
+		  Lisp_Object ro, tem;
+		  struct buffer *old = current_buffer;
+		  int opoint;
+
+		  ro = XBUFFER (buffer)->read_only;
+
+		  /* Avoid error if buffer is deleted
+		     (probably that's why the process is dead, too) */
+		  if (NILP (XBUFFER (buffer)->name))
+		    continue;
+		  Fset_buffer (buffer);
+		  opoint = point;
+		  /* Insert new output into buffer
+		     at the current end-of-output marker,
+		     thus preserving logical ordering of input and output.  */
+		  if (XMARKER (p->mark)->buffer)
+		    SET_PT (marker_position (p->mark));
+		  else
+		    SET_PT (ZV);
+		  if (point <= opoint)
+		    opoint += XSTRING (msg)->size + XSTRING (p->name)->size + 10;
+
+		  tem = current_buffer->read_only;
+		  current_buffer->read_only = Qnil;
+		  insert_string ("\nProcess ");
+		  Finsert (1, &p->name);
+		  insert_string (" ");
+		  Finsert (1, &msg);
+		  current_buffer->read_only = tem;
+		  Fset_marker (p->mark, make_number (point), p->buffer);
+
+		  SET_PT (opoint);
+		  set_buffer_internal (old);
+		}
 	    }
-	}
-    } /* end for */
+	} /* end for */
+    } while (! EQ (old_process_alist, Vprocess_alist));
 
   update_mode_lines++;  /* in case buffers use %s in mode-line-format */
   redisplay_preserve_echo_area ();
-- 
2.39.2