3 files changed, 24 insertions, 17 deletions
diff --git a/src/libutil/archive.cc b/src/libutil/archive.cc
index 5450fd2f7182..6856ea0f2837 100644
--- a/src/libutil/archive.cc
+++ b/src/libutil/archive.cc
@@ -83,22 +83,21 @@ static void dump(const Path & path, Sink & sink, PathFilter & filter)
 
         /* If we're on a case-insensitive system like Mac OS X, undo
            the case hack applied by restorePath(). */
-        Strings names = readDirectory(path);
         std::map<string, string> unhacked;
-        for (auto & i : names)
+        for (auto & i : readDirectory(path))
             if (useCaseHack) {
-                string name(i);
-                size_t pos = i.find(caseHackSuffix);
+                string name(i.name);
+                size_t pos = i.name.find(caseHackSuffix);
                 if (pos != string::npos) {
-                    printMsg(lvlDebug, format("removing case hack suffix from `%1%'") % (path + "/" + i));
+                    printMsg(lvlDebug, format("removing case hack suffix from `%1%'") % (path + "/" + i.name));
                     name.erase(pos);
                 }
                 if (unhacked.find(name) != unhacked.end())
                     throw Error(format("file name collision in between `%1%' and `%2%'")
-                        % (path + "/" + unhacked[name]) % (path + "/" + i));
-                unhacked[name] = i;
+                        % (path + "/" + unhacked[name]) % (path + "/" + i.name));
+                unhacked[name] = i.name;
             } else
-                unhacked[i] = i;
+                unhacked[i.name] = i.name;
 
         for (auto & i : unhacked)
             if (filter(path + "/" + i.first)) {
diff --git a/src/libutil/util.cc b/src/libutil/util.cc
index f762b79c24da..7dc6fe72a41d 100644
--- a/src/libutil/util.cc
+++ b/src/libutil/util.cc
@@ -203,9 +203,10 @@ bool isLink(const Path & path)
 }
 
 
-Strings readDirectory(const Path & path)
+DirEntries readDirectory(const Path & path)
 {
-    Strings names;
+    DirEntries entries;
+    entries.reserve(64);
 
     AutoCloseDir dir = opendir(path.c_str());
     if (!dir) throw SysError(format("opening directory `%1%'") % path);
@@ -215,11 +216,11 @@ Strings readDirectory(const Path & path)
         checkInterrupt();
         string name = dirent->d_name;
         if (name == "." || name == "..") continue;
-        names.push_back(name);
+        entries.emplace_back(DirEntry({ name, dirent->d_ino, dirent->d_type }));
     }
     if (errno) throw SysError(format("reading directory `%1%'") % path);
 
-    return names;
+    return entries;
 }
 
 
@@ -294,16 +295,14 @@ static void _deletePath(const Path & path, unsigned long long & bytesFreed)
         bytesFreed += st.st_blocks * 512;
 
     if (S_ISDIR(st.st_mode)) {
-        Strings names = readDirectory(path);
-
         /* Make the directory writable. */
         if (!(st.st_mode & S_IWUSR)) {
             if (chmod(path.c_str(), st.st_mode | S_IWUSR) == -1)
                 throw SysError(format("making `%1%' writable") % path);
         }
 
-        for (Strings::iterator i = names.begin(); i != names.end(); ++i)
-            _deletePath(path + "/" + *i, bytesFreed);
+        for (auto & i : readDirectory(path))
+            _deletePath(path + "/" + i.name, bytesFreed);
     }
 
     if (remove(path.c_str()) == -1)
diff --git a/src/libutil/util.hh b/src/libutil/util.hh
index 64250c522a52..42215eb1d365 100644
--- a/src/libutil/util.hh
+++ b/src/libutil/util.hh
@@ -64,7 +64,16 @@ bool isLink(const Path & path);
 
 /* Read the contents of a directory.  The entries `.' and `..' are
    removed. */
-Strings readDirectory(const Path & path);
+struct DirEntry
+{
+    string name;
+    ino_t ino;
+    unsigned char type; // one of DT_*
+};
+
+typedef vector<DirEntry> DirEntries;
+
+DirEntries readDirectory(const Path & path);
 
 /* Read the contents of a file into a string. */
 string readFile(int fd);