diff --git a/lab5/user/lab5/apps/init.c b/lab5/user/lab5/apps/init.c
index 821d3f5..43ec581 100644
--- a/lab5/user/lab5/apps/init.c
+++ b/lab5/user/lab5/apps/init.c
@@ -218,7 +218,7 @@ int fs_read_all(char *path, void **ret_buf)
     return size;
 }
 
-int do_ls(char *cmdline)
+int do_ls(char *cmdline, bool detail)
 {
 	char pathbuf[BUFLEN];
     char fpathbuf[BUFLEN];
@@ -240,17 +240,21 @@ int do_ls(char *cmdline)
 
         for (int i = 0; i < ret; i++) {
             dirat = (struct dirent *) print_ptr;
-            // 文件类型
-            char type = 'f';
-            if (dirat->d_type == 2) {
-                type = 'd'; // 目录
+            if (detail) {
+                // 文件类型
+                char type = 'f';
+                if (dirat->d_type == 2) {
+                    type = 'd'; // 目录
+                }
+                // 文件大小
+                strcpy(fpathbuf, pathbuf);
+                path_append(fpathbuf, dirat->d_name);
+                int size = fs_get_size(fpathbuf);
+                // 输出
+                printf("%c %10d %s\n", type, size, dirat->d_name);
+            } else {
+                printf("%s\n", dirat->d_name);
             }
-            // 文件大小
-            strcpy(fpathbuf, pathbuf);
-            path_append(fpathbuf, dirat->d_name);
-            int size = fs_get_size(fpathbuf);
-            // 输出
-            printf("%c %10d %s\n", type, size, dirat->d_name);
             print_ptr += dirat->d_reclen;
         }
     } else {
@@ -318,9 +322,13 @@ int builtin_cmd(char *cmdline)
 		return !ret ? 1 : -1;
 	}
 	if (!strcmp(cmd, "ls")) {
-		ret = do_ls(cmdline);
+		ret = do_ls(cmdline, false);
 		return !ret ? 1 : -1;
 	}
+    if (!strcmp(cmd, "ll")) {
+        ret = do_ls(cmdline, true);
+        return !ret ? 1 : -1;
+    }
 	if (!strcmp(cmd, "echo")) {
 		ret = do_echo(cmdline);
 		return !ret ? 1 : -1;