libos: Add a way to also list entry sizes, modes and mtimes

apps/init.cpp

@@ -224,7 +224,7 @@ static Result<void> load_services()
 {
     auto dir = TRY(os::Directory::open("/etc/init"));
 
-    auto services = TRY(dir->list(os::Directory::Filter::ParentAndBase));
+    auto services = TRY(dir->list_names(os::Directory::Filter::ParentAndBase));
     sort(services.begin(), services.end(), String::compare);
 
     for (const auto& entry : services) TRY(load_service({ dir->fd(), entry.view() }));

libos/include/os/Directory.h

@@ -21,7 +21,17 @@ namespace os
 
         Result<String> next(Filter filter);
 
-        Result<Vector<String>> list(Filter filter);
+        Result<Vector<String>> list_names(Filter filter);
+
+        struct Entry
+        {
+            String name;
+            mode_t mode;
+            usize size;
+            time_t mtime;
+        };
+
+        Result<Vector<Entry>> list(Filter filter);
 
         void rewind();
 

libos/src/Directory.cpp

@@ -2,6 +2,7 @@
 #include <fcntl.h>
 #include <luna/CString.h>
 #include <os/Directory.h>
+#include <os/FileSystem.h>
 #include <sys/syscall.h>
 #include <unistd.h>
 
@@ -54,7 +55,7 @@ namespace os
         return String::from_cstring(ent->d_name);
     }
 
-    Result<Vector<String>> Directory::list(Filter filter)
+    Result<Vector<String>> Directory::list_names(Filter filter)
     {
         Vector<String> result;
 
@@ -66,6 +67,31 @@ namespace os
         return result;
     }
 
+    Result<Vector<Directory::Entry>> Directory::list(Filter filter)
+    {
+        Vector<Directory::Entry> result;
+
+        rewind();
+
+        String name {};
+        while ((name = TRY(next(filter))), !name.is_empty())
+        {
+            struct stat st;
+            TRY(FileSystem::stat({ dirfd(m_dirp), name.chars() }, st, false));
+
+            Directory::Entry entry {
+                .name = move(name),
+                .mode = st.st_mode,
+                .size = (usize)st.st_size,
+                .mtime = st.st_mtime,
+            };
+
+            TRY(result.try_append(move(entry)));
+        }
+
+        return result;
+    }
+
     void Directory::rewind()
     {
         rewinddir(m_dirp);

libos/src/FileSystem.cpp

@@ -62,7 +62,7 @@ namespace os::FileSystem
 
         auto dir = TRY(os::Directory::open(path));
 
-        Vector<String> entries = TRY(dir->list(os::Directory::Filter::ParentAndBase));
+        Vector<String> entries = TRY(dir->list_names(os::Directory::Filter::ParentAndBase));
 
         for (const auto& entry : entries) { TRY(remove_tree({ dir->fd(), entry.view() })); }