1 files changed, 10 insertions, 0 deletions
diff --git a/src/libutil/util.cc b/src/libutil/util.cc
index 1b744999153a..6f3bf7ae86e3 100644
--- a/src/libutil/util.cc
+++ b/src/libutil/util.cc
@@ -475,6 +475,16 @@ Path createTempDir(const Path & tmpRoot, const Path & prefix,
 }
 
 
+std::string getUserName()
+{
+    auto pw = getpwuid(geteuid());
+    std::string name = pw ? pw->pw_name : getEnv("USER", "");
+    if (name.empty())
+        throw Error("cannot figure out user name");
+    return name;
+}
+
+
 static Lazy<Path> getHome2([]() {
     Path homeDir = getEnv("HOME");
     if (homeDir.empty()) {