Extract file_contexts from zips if it exists
Update binary will now extract file_contexts if it exists in the
root of the zip to /tmp
Recovery will replace the existing /file_contexts in the ramdisk
if file_contexts exists in the root of the zip.
This ensure that the proper contexts are used during zip installs.
Change-Id: If22c41101868643b67e6dba6177677c078fcd877
diff --git a/twinstall.cpp b/twinstall.cpp
index 041c78d..8af7099 100644
--- a/twinstall.cpp
+++ b/twinstall.cpp
@@ -55,13 +55,44 @@
ret_val = mzExtractZipEntryToFile(Zip, binary_location, binary_fd);
close(binary_fd);
- mzCloseZipArchive(Zip);
if (!ret_val) {
+ mzCloseZipArchive(Zip);
LOGERR("Could not extract '%s'\n", ASSUMED_UPDATE_BINARY_NAME);
return INSTALL_ERROR;
}
+ // If exists, extract file_contexts from the zip file
+ const ZipEntry* selinx_contexts = mzFindZipEntry(Zip, "file_contexts");
+ if (selinx_contexts == NULL) {
+ mzCloseZipArchive(Zip);
+ LOGINFO("Zip does not contain SELinux file_contexts file in its root.\n");
+ } else {
+ string output_filename = "/file_contexts";
+ LOGINFO("Zip contains SELinux file_contexts file in its root. Extracting to %s\n", output_filename.c_str());
+ // Delete any file_contexts
+ if (TWFunc::Path_Exists(output_filename) && unlink(output_filename.c_str()) != 0) {
+ LOGINFO("Unable to unlink '%s'\n", output_filename.c_str());
+ }
+
+ int file_contexts_fd = creat(output_filename.c_str(), 0644);
+ if (file_contexts_fd < 0) {
+ mzCloseZipArchive(Zip);
+ LOGERR("Could not extract file_contexts to '%s'\n", output_filename.c_str());
+ return INSTALL_ERROR;
+ }
+
+ ret_val = mzExtractZipEntryToFile(Zip, selinx_contexts, file_contexts_fd);
+ close(file_contexts_fd);
+
+ if (!ret_val) {
+ mzCloseZipArchive(Zip);
+ LOGERR("Could not extract '%s'\n", ASSUMED_UPDATE_BINARY_NAME);
+ return INSTALL_ERROR;
+ }
+ }
+ mzCloseZipArchive(Zip);
+
pipe(pipe_fd);
args[0] = Temp_Binary.c_str();