Auto detect possible use of legacy props
* Revert: Make legacy props an option disabled by default
(reverted from commit 75aa615767457f2b62dda65b16ded41b0e6df11f)
* Instead check for ANDROID_PROPERTY_WORKSPACE in the updater-
binary to determine whether legacy property service can be
used
Change-Id: If68d5cca9a2b56edcb1c73db0474668cf46d8c91
diff --git a/twinstall.cpp b/twinstall.cpp
index b0b6f3d..0aaab45 100644
--- a/twinstall.cpp
+++ b/twinstall.cpp
@@ -16,10 +16,16 @@
along with TWRP. If not, see <http://www.gnu.org/licenses/>.
*/
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
+#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
@@ -167,19 +173,51 @@
return INSTALL_SUCCESS;
}
+static bool update_binary_has_legacy_properties(const char *binary) {
+ const char str_to_match[] = "ANDROID_PROPERTY_WORKSPACE";
+ int len_to_match = sizeof(str_to_match) - 1;
+ bool found = false;
+
+ int fd = open(binary, O_RDONLY);
+ if (fd < 0) {
+ LOGINFO("has_legacy_properties: Could not open %s: %s!\n", binary, strerror(errno));
+ return false;
+ }
+
+ struct stat finfo;
+ if (fstat(fd, &finfo) < 0) {
+ LOGINFO("has_legacy_properties: Could not fstat %d: %s!\n", fd, strerror(errno));
+ close(fd);
+ return false;
+ }
+
+ void *data = mmap(NULL, finfo.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
+ if (data == MAP_FAILED) {
+ LOGINFO("has_legacy_properties: mmap (size=%lld) failed: %s!\n", finfo.st_size, strerror(errno));
+ } else {
+ if (memmem(data, finfo.st_size, str_to_match, len_to_match)) {
+ LOGINFO("has_legacy_properties: Found legacy property match!\n");
+ found = true;
+ }
+ munmap(data, finfo.st_size);
+ }
+ close(fd);
+
+ return found;
+}
+
static int Run_Update_Binary(const char *path, ZipWrap *Zip, int* wipe_cache, zip_type ztype) {
int ret_val, pipe_fd[2], status, zip_verify;
char buffer[1024];
FILE* child_data;
#ifndef TW_NO_LEGACY_PROPS
- if (DataManager::GetIntValue("tw_enable_legacy_props") != 0) {
- /* Set legacy properties */
- if (switch_to_legacy_properties() != 0) {
- LOGERR("Legacy property environment did not initialize successfully. Properties may not be detected.\n");
- } else {
- LOGINFO("Legacy property environment initialized.\n");
- }
+ if (!update_binary_has_legacy_properties(TMP_UPDATER_BINARY_PATH)) {
+ LOGINFO("Legacy property environment not used in updater.\n");
+ } else if (switch_to_legacy_properties() != 0) { /* Set legacy properties */
+ LOGERR("Legacy property environment did not initialize successfully. Properties may not be detected.\n");
+ } else {
+ LOGINFO("Legacy property environment initialized.\n");
}
#endif
@@ -260,14 +298,12 @@
int waitrc = TWFunc::Wait_For_Child(pid, &status, "Updater");
#ifndef TW_NO_LEGACY_PROPS
- if (DataManager::GetIntValue("tw_enable_legacy_props") != 0) {
- /* Unset legacy properties */
- if (legacy_props_path_modified) {
- if (switch_to_new_properties() != 0) {
- LOGERR("Legacy property environment did not disable successfully. Legacy properties may still be in use.\n");
- } else {
- LOGINFO("Legacy property environment disabled.\n");
- }
+ /* Unset legacy properties */
+ if (legacy_props_path_modified) {
+ if (switch_to_new_properties() != 0) {
+ LOGERR("Legacy property environment did not disable successfully. Legacy properties may still be in use.\n");
+ } else {
+ LOGINFO("Legacy property environment disabled.\n");
}
}
#endif