From a95a43a6bb7cada85f997d5f96f611967addf607 Mon Sep 17 00:00:00 2001
From: Francesco Chemolli <kinkie@squid-cache.org>
Date: Sun, 12 Jul 2015 19:42:49 +0200
Subject: [PATCH] Save errno to prevent debugs from clobbering it

---
 src/debug.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/debug.cc b/src/debug.cc
index 5d573a8abb..85a03772d4 100644
--- a/src/debug.cc
+++ b/src/debug.cc
@@ -470,7 +470,8 @@ _db_rotate_log(void)
 #endif
         errno = 0;
         if (rename(from, to) == -1) {
-            debugs(0, DBG_IMPORTANT, "log rotation failed: " << xstrerror());
+            const auto saved_errno = errno;
+            debugs(0, DBG_IMPORTANT, "log rotation failed: " << xstrerr(saved_errno));
         }
     }
 
-- 
2.47.2