From ff421474f09f3fe3f05125edbc2810f1c2f614f7 Mon Sep 17 00:00:00 2001
From: Sandro Santilli <strk@kbt.io>
Date: Tue, 27 Sep 2016 08:04:34 +0000
Subject: [PATCH] Do not call printf from interrupt handler, fixing deadlocks

Closes #3644

git-svn-id: http://svn.osgeo.org/postgis/trunk@15156 b70326c6-7e19-0410-871a-916f4a2858ee
---
 postgis/postgis_module.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/postgis/postgis_module.c b/postgis/postgis_module.c
index 7f2e35125..e107098c7 100644
--- a/postgis/postgis_module.c
+++ b/postgis/postgis_module.c
@@ -127,7 +127,12 @@ _PG_fini(void)
 static void
 handleInterrupt(int sig)
 {
-  printf("Interrupt requested\n"); fflush(stdout);
+  /* NOTE: printf here would be dangerous, see
+   * https://trac.osgeo.org/postgis/ticket/3644
+   *
+   * TODO: block interrupts during execution, to fix the problem
+   */
+  /* printf("Interrupt requested\n"); fflush(stdout); */
 
 #if POSTGIS_GEOS_VERSION >= 34
   GEOS_interruptRequest();
-- 
2.50.1