Mount the new system as 'postinstall_file' in postinstall.
When mounting the new filesystem on /postinstall, we need to override
the file attributes from the new system (unknown to the current selinux
policies) with a consistent label that will be used only in the context
of postinstall. This patch passes an extra option to mount(2) in
Brillo and Android to achieve this.
Bug: 27177071
TEST=Deployed a postinstall script with `ls -laZ`, contents show "postinstall_file".
Change-Id: Ia43b45c92e4c4cd340a884818ac00f24a418f9e7
diff --git a/common/test_utils.cc b/common/test_utils.cc
index a574863..77a9141 100644
--- a/common/test_utils.cc
+++ b/common/test_utils.cc
@@ -260,7 +260,7 @@
string loop_dev;
loop_binder_.reset(new ScopedLoopbackDeviceBinder(file_path, &loop_dev));
- EXPECT_TRUE(utils::MountFilesystem(loop_dev, *mnt_path, flags, ""));
+ EXPECT_TRUE(utils::MountFilesystem(loop_dev, *mnt_path, flags, "", nullptr));
unmounter_.reset(new ScopedFilesystemUnmounter(*mnt_path));
}