diff --git a/cmds/installd/utils.h b/cmds/installd/utils.h
index 2db1623..2d00845 100644
--- a/cmds/installd/utils.h
+++ b/cmds/installd/utils.h
@@ -160,7 +160,8 @@
 
 int ensure_config_user_dirs(userid_t userid);
 
-int wait_child(pid_t pid);
+// Waits for a child process, or kills it if it times out. Returns the exit code.
+int wait_child_with_timeout(pid_t pid, int timeout_ms);
 
 int prepare_app_cache_dir(const std::string& parent, const char* name, mode_t target_mode,
         uid_t uid, gid_t gid);
@@ -177,6 +178,10 @@
 
 void drop_capabilities(uid_t uid);
 
+// Removes a file specified by a file descriptor. Returns true on success. Reports the file path to
+// `path` if present.
+bool remove_file_at_fd(int fd, /*out*/ std::string* path = nullptr);
+
 }  // namespace installd
 }  // namespace android