From 390243fb7c10276e8f882ef6fc2add39f2b1c8ae Mon Sep 17 00:00:00 2001
From: Alexander Larsson <alexander.larsson@gmail.com>
Date: Mon, 17 Sep 2018 14:54:22 +0100
Subject: [PATCH] utils: Add flatpak_file_is_non_empty()

Utility to check for existing, regular (or symlink to regular) files
that are not empty.wq
---
 common/flatpak-utils-private.h |  2 ++
 common/flatpak-utils.c         | 15 +++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/common/flatpak-utils-private.h b/common/flatpak-utils-private.h
index 5620c5a3b..a6d1a9a3d 100644
--- a/common/flatpak-utils-private.h
+++ b/common/flatpak-utils-private.h
@@ -493,6 +493,8 @@ char * flatpak_resolve_link (const char *path,
                              GError    **error);
 char * flatpak_canonicalize_filename (const char *path);
 
+gboolean flatpak_file_is_non_empty (const char *path);
+
 gboolean flatpak_file_rename (GFile        *from,
                               GFile        *to,
                               GCancellable *cancellable,
diff --git a/common/flatpak-utils.c b/common/flatpak-utils.c
index 875887cf8..81cd0ef01 100644
--- a/common/flatpak-utils.c
+++ b/common/flatpak-utils.c
@@ -2164,6 +2164,21 @@ flatpak_canonicalize_filename (const char *path)
   return g_file_get_path (file);
 }
 
+/* Check for non-empty regular files */
+gboolean
+flatpak_file_is_non_empty (const char *path)
+{
+  struct stat stbuf;
+
+  if (TEMP_FAILURE_RETRY (stat (path, &stbuf)) != 0)
+    return FALSE;
+
+  if (!S_ISREG (stbuf.st_mode) || stbuf.st_size == 0)
+    return FALSE;
+
+  return TRUE;
+}
+
 gboolean
 flatpak_file_rename (GFile        *from,
                      GFile        *to,