check for system.posix_acl_default before setting umask

src/fs_acl.cpp

@@ -0,0 +1,43 @@
+/*
+  ISC License
+
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string>
+
+#include "fs_base_getxattr.hpp"
+#include "fs_path.hpp"
+
+const char POSIX_ACL_DEFAULT_XATTR[] = "system.posix_acl_default";
+
+namespace fs
+{
+  namespace acl
+  {
+    bool
+    dir_has_defaults(const std::string &fullpath)
+    {
+      int rv;
+      std::string dirpath = fullpath;
+
+      fs::path::dirname(dirpath);
+
+      rv = fs::lgetxattr(dirpath,POSIX_ACL_DEFAULT_XATTR,NULL,0);
+
+      return (rv != -1);
+    }
+  }
+}