posix: print error message when mkdtemp fails.

base/file_util_posix.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/file_util.h"
 
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <fnmatch.h>
@@ skipping 402 matching lines @@
                                         FilePath* new_dir) {
   CHECK(name_tmpl.find("XXXXXX") != FilePath::StringType::npos)
     << "Directory name template must contain \"XXXXXX\".";
 
   FilePath sub_dir = base_dir.Append(name_tmpl);
   std::string sub_dir_string = sub_dir.value();
 
   // this should be OK since mkdtemp just replaces characters in place
   char* buffer = const_cast<char*>(sub_dir_string.c_str());
   char* dtemp = mkdtemp(buffer);
-  if (!dtemp)
+  if (!dtemp) {
+    DPLOG(ERROR) << "mkdtemp";

[Nico, 2010/07/28 20:57:52]

<< errno?

or does DPLOG do that already?

     return false;
+  }
   *new_dir = FilePath(dtemp);
   return true;
 }
 
 bool CreateTemporaryDirInDir(const FilePath& base_dir,
                              const FilePath::StringType& prefix,
                              bool loosen_permissions,
                              FilePath* new_dir) {
   // To understand crbug/35198, the ability to call this
   // this function on windows while giving loose permissions
@@ skipping 404 matching lines @@
   if (HANDLE_EINTR(close(infile)) < 0)
     result = false;
   if (HANDLE_EINTR(close(outfile)) < 0)
     result = false;
 
   return result;
 }
 #endif  // defined(OS_MACOSX)
 
 } // namespace file_util