coverity 1462581 Dereference after null check

[openssl.git] / util / mkdir-p.pl

diff --git a/util/mkdir-p.pl b/util/mkdir-p.pl
index 4f44266802c041a8a885e85f689c9196cad949be..dacf3ab16f9610ff1f1b5768a811219c74f2e3c8 100755 (executable)
--- a/util/mkdir-p.pl
+++ b/util/mkdir-p.pl
@@ -1,7 +1,7 @@
 #! /usr/bin/env perl
 # Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
 #
-# Licensed under the OpenSSL license (the "License").  You may not use
+# Licensed under the Apache License 2.0 (the "License").  You may not use
 # this file except in compliance with the License.  You can obtain a copy
 # in the file LICENSE in the source distribution or at
 # https://www.openssl.org/source/license.html
@@ -33,6 +33,12 @@ sub do_mkdir_p {
     do_mkdir_p($parent);
   }
 
-  mkdir($dir, 0777) || die "Cannot create directory $dir: $!\n";
+  unless (mkdir($dir, 0777)) {
+    if (-d $dir) {
+      # We raced against another instance doing the same thing.
+      return;
+    }
+    die "Cannot create directory $dir: $!\n";
+  }
   print "created directory `$dir'\n";
 }