allow recovery packages to wipe cache
updater now has a function "wipe_cache();" which causes recovery to
wipe the cache partition after the successful installation of the
package. Move log copying around a bit so logs and the last_install
flag file are copied to cache after it's wiped.
Bug: 5314244
Change-Id: Id35a9eb6dcd626c8f3a3a0076074f462ed3d44bd
diff --git a/recovery.c b/recovery.c
index 1e3eb5a..06d6498 100644
--- a/recovery.c
+++ b/recovery.c
@@ -52,9 +52,11 @@
static const char *INTENT_FILE = "/cache/recovery/intent";
static const char *LOG_FILE = "/cache/recovery/log";
static const char *LAST_LOG_FILE = "/cache/recovery/last_log";
+static const char *LAST_INSTALL_FILE = "/cache/recovery/last_install";
static const char *CACHE_ROOT = "/cache";
static const char *SDCARD_ROOT = "/sdcard";
static const char *TEMPORARY_LOG_FILE = "/tmp/recovery.log";
+static const char *TEMPORARY_INSTALL_FILE = "/tmp/last_install";
static const char *SIDELOAD_TEMP_DIR = "/tmp/sideload";
extern UIParameters ui_parameters; // from ui.c
@@ -223,15 +225,13 @@
static long tmplog_offset = 0;
static void
-copy_log_file(const char* destination, int append) {
+copy_log_file(const char* source, const char* destination, int append) {
FILE *log = fopen_path(destination, append ? "a" : "w");
if (log == NULL) {
LOGE("Can't open %s\n", destination);
} else {
- FILE *tmplog = fopen(TEMPORARY_LOG_FILE, "r");
- if (tmplog == NULL) {
- LOGE("Can't open %s\n", TEMPORARY_LOG_FILE);
- } else {
+ FILE *tmplog = fopen(source, "r");
+ if (tmplog != NULL) {
if (append) {
fseek(tmplog, tmplog_offset, SEEK_SET); // Since last write
}
@@ -240,7 +240,7 @@
if (append) {
tmplog_offset = ftell(tmplog);
}
- check_and_fclose(tmplog, TEMPORARY_LOG_FILE);
+ check_and_fclose(tmplog, source);
}
check_and_fclose(log, destination);
}
@@ -265,9 +265,13 @@
}
// Copy logs to cache so the system can find out what happened.
- copy_log_file(LOG_FILE, true);
- copy_log_file(LAST_LOG_FILE, false);
+ copy_log_file(TEMPORARY_LOG_FILE, LOG_FILE, true);
+ copy_log_file(TEMPORARY_LOG_FILE, LAST_LOG_FILE, false);
+ copy_log_file(TEMPORARY_INSTALL_FILE, LAST_INSTALL_FILE, false);
+ chmod(LOG_FILE, 0600);
+ chown(LOG_FILE, 1000, 1000); // system user
chmod(LAST_LOG_FILE, 0640);
+ chmod(LAST_INSTALL_FILE, 0644);
// Reset to mormal system boot so recovery won't cycle indefinitely.
struct bootloader_message boot;
@@ -280,6 +284,7 @@
LOGW("Can't unlink %s\n", COMMAND_FILE);
}
+ ensure_path_unmounted(CACHE_ROOT);
sync(); // For good measure.
}
@@ -289,6 +294,8 @@
ui_show_indeterminate_progress();
ui_print("Formatting %s...\n", volume);
+ ensure_path_unmounted(volume);
+
if (strcmp(volume, "/cache") == 0) {
// Any part of the log we'd copied to cache is now gone.
// Reset the pointer so we copy from the beginning of the temp
@@ -469,7 +476,8 @@
}
static int
-update_directory(const char* path, const char* unmount_when_done) {
+update_directory(const char* path, const char* unmount_when_done,
+ int* wipe_cache) {
ensure_path_mounted(path);
const char* MENU_HEADERS[] = { "Choose a package to install:",
@@ -558,7 +566,7 @@
strlcat(new_path, "/", PATH_MAX);
strlcat(new_path, item, PATH_MAX);
new_path[strlen(new_path)-1] = '\0'; // truncate the trailing '/'
- result = update_directory(new_path, unmount_when_done);
+ result = update_directory(new_path, unmount_when_done, wipe_cache);
if (result >= 0) break;
} else {
// selected a zip file: attempt to install it, and return
@@ -575,7 +583,7 @@
ensure_path_unmounted(unmount_when_done);
}
if (copy) {
- result = install_package(copy);
+ result = install_package(copy, wipe_cache, TEMPORARY_INSTALL_FILE);
free(copy);
} else {
result = INSTALL_ERROR;
@@ -650,6 +658,7 @@
chosen_item = device_perform_action(chosen_item);
int status;
+ int wipe_cache;
switch (chosen_item) {
case ITEM_REBOOT:
return;
@@ -667,7 +676,15 @@
break;
case ITEM_APPLY_SDCARD:
- status = update_directory(SDCARD_ROOT, SDCARD_ROOT);
+ status = update_directory(SDCARD_ROOT, SDCARD_ROOT, &wipe_cache);
+ if (status == INSTALL_SUCCESS && wipe_cache) {
+ ui_print("\n-- Wiping cache (at package request)...\n");
+ if (erase_volume("/cache")) {
+ ui_print("Cache wipe failed.\n");
+ } else {
+ ui_print("Cache wipe complete.\n");
+ }
+ }
if (status >= 0) {
if (status != INSTALL_SUCCESS) {
ui_set_background(BACKGROUND_ICON_ERROR);
@@ -681,7 +698,15 @@
break;
case ITEM_APPLY_CACHE:
// Don't unmount cache at the end of this.
- status = update_directory(CACHE_ROOT, NULL);
+ status = update_directory(CACHE_ROOT, NULL, &wipe_cache);
+ if (status == INSTALL_SUCCESS && wipe_cache) {
+ ui_print("\n-- Wiping cache (at package request)...\n");
+ if (erase_volume("/cache")) {
+ ui_print("Cache wipe failed.\n");
+ } else {
+ ui_print("Cache wipe complete.\n");
+ }
+ }
if (status >= 0) {
if (status != INSTALL_SUCCESS) {
ui_set_background(BACKGROUND_ICON_ERROR);
@@ -768,7 +793,12 @@
int status = INSTALL_SUCCESS;
if (update_package != NULL) {
- status = install_package(update_package);
+ status = install_package(update_package, &wipe_cache, TEMPORARY_INSTALL_FILE);
+ if (status == INSTALL_SUCCESS && wipe_cache) {
+ if (erase_volume("/cache")) {
+ LOGE("Cache wipe (requested by package) failed.");
+ }
+ }
if (status != INSTALL_SUCCESS) ui_print("Installation aborted.\n");
} else if (wipe_data) {
if (device_wipe_data()) status = INSTALL_ERROR;