From: Theodore Ts'o <tytso@mit.edu>
Date: Sun, 10 Feb 2008 04:39:27 +0000 (-0500)
Subject: libcom_err: Use thread local storage to fix reentrancy problems
X-Git-Tag: v1.40.6~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=47526e3568f93a13caa347408496f1f1d48af74c;p=thirdparty%2Fe2fsprogs.git

libcom_err: Use thread local storage to fix reentrancy problems

Address the theoretical problem of two threads trying to format a
different unknown error code by using TLS.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---

diff --git a/lib/et/error_message.c b/lib/et/error_message.c
index 708dd2fc5..2507fc032 100644
--- a/lib/et/error_message.c
+++ b/lib/et/error_message.c
@@ -38,7 +38,13 @@
 #include "error_table.h"
 #include "internal.h"
 
-static char buffer[25];
+#ifdef TLS
+#define THREAD_LOCAL static TLS
+#else
+#define THREAD_LOCAL static
+#endif
+
+THREAD_LOCAL char buffer[25];
 
 struct et_list * _et_list = (struct et_list *) NULL;
 struct et_list * _et_dynamic_list = (struct et_list *) NULL;