From 5491233f5245c464be2286ad894448b21ef757db Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Mon, 18 Dec 2000 17:33:42 +0000
Subject: Ensure that 'errno' is saved and restored by all signal handlers that
 might change it.  Experimentation shows that the signal handler call
 mechanism does not save/restore errno for you, at least not on Linux or HPUX,
 so this is definitely a real risk.

---
 src/backend/commands/async.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src/backend/commands')

diff --git a/src/backend/commands/async.c b/src/backend/commands/async.c
index 6316262d042..b86f2421eb8 100644
--- a/src/backend/commands/async.c
+++ b/src/backend/commands/async.c
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/commands/async.c,v 1.73 2000/11/28 23:27:54 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/commands/async.c,v 1.74 2000/12/18 17:33:40 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -589,6 +589,7 @@ AtAbort_Notify()
 void
 Async_NotifyHandler(SIGNAL_ARGS)
 {
+	int			save_errno = errno;
 
 	/*
 	 * Note: this is a SIGNAL HANDLER.	You must be very wary what you do
@@ -637,6 +638,8 @@ Async_NotifyHandler(SIGNAL_ARGS)
 		 */
 		notifyInterruptOccurred = 1;
 	}
+
+	errno = save_errno;
 }
 
 /*
-- 
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