X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=util%2Fmkdir-p.pl;h=328060243f3c5ad18f30803ce3716cc1cdfe86fe;hp=e73d02b073bbf6171d300b1d66ca2be542dcf15a;hb=c2bdf05f4b5430b5cc9d8122295b8484280e070f;hpb=fbf002bb889d88ceb65d10c9c0062410e278f3e9

diff --git a/util/mkdir-p.pl b/util/mkdir-p.pl
index e73d02b073..328060243f 100755
--- a/util/mkdir-p.pl
+++ b/util/mkdir-p.pl
@@ -1,6 +1,10 @@
-#!/usr/local/bin/perl
-
-# mkdir-p.pl
+#! /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
+# 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
 
 # On some systems, the -p option to mkdir (= also create any missing parent
 # directories) is not available.
@@ -29,6 +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";
 }