2 files changed, 10 insertions, 2 deletions
diff --git a/src/libutil/util.cc b/src/libutil/util.cc
index 197df0c44aa0..272997397794 100644
--- a/src/libutil/util.cc
+++ b/src/libutil/util.cc
@@ -192,6 +192,12 @@ bool isInDir(const Path & path, const Path & dir)
 }
 
 
+bool isDirOrInDir(const Path & path, const Path & dir)
+{
+    return path == dir or isInDir(path, dir);
+}
+
+
 struct stat lstat(const Path & path)
 {
     struct stat st;
diff --git a/src/libutil/util.hh b/src/libutil/util.hh
index a3494e09b09b..75eb9751524e 100644
--- a/src/libutil/util.hh
+++ b/src/libutil/util.hh
@@ -53,10 +53,12 @@ Path dirOf(const Path & path);
    following the final `/'. */
 string baseNameOf(const Path & path);
 
-/* Check whether a given path is a descendant of the given
-   directory. */
+/* Check whether 'path' is a descendant of 'dir'. */
 bool isInDir(const Path & path, const Path & dir);
 
+/* Check whether 'path' is equal to 'dir' or a descendant of 'dir'. */
+bool isDirOrInDir(const Path & path, const Path & dir);
+
 /* Get status of `path'. */
 struct stat lstat(const Path & path);