From cc418866a1dc7aa2ed8a67c711c2ea609bf06752 Mon Sep 17 00:00:00 2001
From: Paul Ackersviller <packersv@users.sourceforge.net>
Date: Sun, 9 Dec 2007 02:07:09 +0000
Subject: Merge of Guillaume Chazarain's 24170: block interrupts around fork
 since it may mess with locks.

---
 Src/exec.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Src/exec.c b/Src/exec.c
index 19d68060f..76bd8638a 100644
--- a/Src/exec.c
+++ b/Src/exec.c
@@ -228,7 +228,15 @@ zfork(struct timeval *tv)
     }
     if (tv)
 	gettimeofday(tv, &dummy_tz);
+    /*
+     * Queueing signals is necessary on Linux because fork()
+     * manipulates mutexes, leading to deadlock in memory
+     * allocation.  We don't expect fork() to be particularly
+     * zippy anyway.
+     */
+    queue_signals();
     pid = fork();
+    unqueue_signals();
     if (pid == -1) {
 	zerr("fork failed: %e", NULL, errno);
 	return -1;
-- 
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