From 11c2a2dc3a734cae3027e8913833a1cdd8d1f26a Mon Sep 17 00:00:00 2001
From: "Tobias S. Josefowitz" <tobij@tobij.de>
Date: Wed, 17 Sep 2014 15:47:19 +0200
Subject: [PATCH] signal_handler: don't "randomly" change errno in
receive_sigchild()
---
src/signal_handler.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/signal_handler.c b/src/signal_handler.c
index b7fc502007..6c998b88b9 100644
--- a/src/signal_handler.c
+++ b/src/signal_handler.c
@@ -1186,6 +1186,7 @@ static RETSIGTYPE receive_sigchild(int UNUSED(signum))
{
pid_t pid;
WAITSTATUSTYPE status;
+ int masked_errno = errno;
PROC_FPRINTF((stderr, "[%d] receive_sigchild\n", getpid()));
@@ -1224,6 +1225,11 @@ static RETSIGTYPE receive_sigchild(int UNUSED(signum))
register_signal(SIGCHLD);
SAFE_FIFO_DEBUG_END();
+
+ /* The wait and possibly the signal stuff can obfuscate errno here,
+ * while outside of the signal handler we might be in, say, the backend,
+ * and cause a bit of trouble there. Let's leave errno as we found it. */
+ errno = masked_errno;
}
#endif
--
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