From: JINMEI Tatuya <jinmei@isc.org>
Date: Thu, 8 Nov 2012 07:40:37 +0000 (-0800)
Subject: [2447] show the reason of the error when opening IPC lock file fails.
X-Git-Tag: trac2487_base~1^2~31^2~1^2^2~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ec63a9a5baf587354f220b5a3a306dbb36fc7fb6;p=thirdparty%2Fkea.git

[2447] show the reason of the error when opening IPC lock file fails.
---

diff --git a/src/lib/util/interprocess_sync_file.cc b/src/lib/util/interprocess_sync_file.cc
index d045449025..25af55cb37 100644
--- a/src/lib/util/interprocess_sync_file.cc
+++ b/src/lib/util/interprocess_sync_file.cc
@@ -15,6 +15,8 @@
 #include "interprocess_sync_file.h"
 
 #include <string>
+#include <cerrno>
+#include <cstring>
 
 #include <stdlib.h>
 #include <string.h>
@@ -68,8 +70,8 @@ InterprocessSyncFile::do_lock(int cmd, short l_type) {
 
         if (fd_ == -1) {
             isc_throw(InterprocessSyncFileError,
-                      "Unable to use interprocess sync lockfile: " +
-                      lockfile_path);
+                      "Unable to use interprocess sync lockfile ("
+                      << std::strerror(errno) << "): " << lockfile_path);
         }
     }