From f60f91089067283ff9d7de8cbb395d60cf0a0bbf Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Wed, 26 Jun 1996 17:41:44 +0000
Subject: [PATCH] (x_connection_signal): Just return after calling `signal'.
 (X_CONNECTION_LOCK_FLAG): Definition deleted. (x_connection_signal_dpyinfo):
 Variable deleted. (x_connection_signal_1): Function deleted.
 (x_connection_close_if_hung): Function deleted.

---
 src/xterm.c | 100 +++++-----------------------------------------------
 1 file changed, 8 insertions(+), 92 deletions(-)

diff --git a/src/xterm.c b/src/xterm.c
index 991b66995cf..d798f10fb1c 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -121,10 +121,6 @@ extern void _XEditResCheckMessages ();
 #include <string.h>
 #endif
 
-#ifdef SOLARIS2
-#define X_CONNECTION_LOCK_FLAG XlibDisplayWriting
-#endif
-
 #ifndef min
 #define min(a,b) ((a)<(b) ? (a) : (b))
 #endif
@@ -4580,55 +4576,19 @@ x_io_error_quitter (display)
 
 /* Handle SIGPIPE, which can happen when the connection to a server
    simply goes away.  SIGPIPE is handled by x_connection_signal.
-   It works by sending a no-op command to each X server connection.
-   When we try a connection that has closed, we get SIGPIPE again.
-   But this time, it is handled by x_connection_signal_1.
-   That function knows which connection we were testing,
-   so it closes that one.
+   Don't need to do anything, because the write which caused the 
+   SIGPIPE will fail, causing Xlib to invoke the X IO error handler,
+   which will do the appropriate cleanup for us. */
    
-   x_connection_closed never returns,
-   so if more than one connection was lost at once,
-   we only find one.  But XTread_socket keeps trying them all,
-   so it will notice the other closed one sooner or later.  */
-   
-
-static struct x_display_info *x_connection_signal_dpyinfo;
-
-static SIGTYPE x_connection_signal ();
-
-static SIGTYPE
-x_connection_signal_1 (signalnum)	/* If we don't have an argument, */
-     int signalnum;		/* some compilers complain in signal calls. */
-{
-  signal (SIGPIPE, x_connection_signal);
-  x_connection_closed (x_connection_signal_dpyinfo->display,
-		       "connection was lost");
-}
-
 static SIGTYPE
 x_connection_signal (signalnum)	/* If we don't have an argument, */
      int signalnum;		/* some compilers complain in signal calls. */
 {
-  x_connection_signal_dpyinfo = x_display_list;
-
-  sigunblock (sigmask (SIGPIPE));
-
-  while (x_connection_signal_dpyinfo)
-    {
-      signal (SIGPIPE, x_connection_signal_1);
-
-      x_connection_close_if_hung (x_connection_signal_dpyinfo);
-
-      XNoOp (x_connection_signal_dpyinfo->display);
-
-      XSync (x_connection_signal_dpyinfo->display, False);
-
-      /* Each time we get here, cycle through the displays now open.  */
-      x_connection_signal_dpyinfo = x_connection_signal_dpyinfo->next;
-    }
-
-  /* We should have found some closed connection.  */
-  abort ();
+#ifdef USG
+  /* USG systems forget handlers when they are used;
+     must reestablish each time */
+  signal (signalnum, x_connection_signal);
+#endif /* USG */
 }
 
 /* A buffer for storing X error messages.  */
@@ -6244,49 +6204,5 @@ syms_of_xterm ()
   staticpro (&Qvendor_specific_keysyms);
   Qvendor_specific_keysyms = intern ("vendor-specific-keysyms");
 }
-
-/* Avoid warnings or errors from including Xlibint.h.
-   We don't need these functions for the rest of this file.  */
-#undef bzero
-#undef bcopy
-#undef bcmp
-#undef min
-#undef max
-
-#ifdef X_CONNECTION_LOCK_FLAG
-#define free loserfree
-#define malloc losermalloc
-#define exit loserexit
-#define abort loserabort
-/* For XlibDisplayWriting */
-#include <X11/Xlibint.h>
-#endif
-
-/* Check whether display connection DPYINFO is hung
-   because its thread-interlock is locked.
-   If it is, close the connection.
-   Do nothing if this system does not have a thread interlock.  */
-
-x_connection_close_if_hung (dpyinfo)
-     struct x_display_info *dpyinfo;
-{      
-  /* This tests (1) whether X_CONNECTION_LOCK_FLAG is defined at all,
-     and (2) whether the name it is defined as is itself defined.
-     (It ought to have been defined by Xlibint.h.  */
-#if X_CONNECTION_LOCK_FLAG
-
-  if (dpyinfo->display->flags & X_CONNECTION_LOCK_FLAG)
-    {
-      /* If the thread-interlock is locked, assume this connection is dead.
-	 This assumes that the library does not make other threads
-	 that can be locking the display legitimately.  */
-
-      dpyinfo->display->flags &= ~X_CONNECTION_LOCK_FLAG;
-      x_connection_closed (dpyinfo->display, "connection was lost");
-    }
-#endif /* X_CONNECTION_LOCK_FLAG */
-}
-
-/* Don't put any additional functions here!  */
 
 #endif /* not HAVE_X_WINDOWS */
-- 
2.39.2