protect all /cache/recovery/last_* files from deletion

Preserve any files name /cache/recovery/last_*, not just last_log,
when booting.

Change-Id: Ie36da5b9552e4a7100ecf3774fb1a8aaa22bfdbd

1 files changed, 4 insertions, 3 deletions

diff --git a/core/java/android/os/RecoverySystem.java b/core/java/android/os/RecoverySystem.java
index c1dd9119e4cc..ae605fb3ac5d 100644
--- a/core/java/android/os/RecoverySystem.java
+++ b/core/java/android/os/RecoverySystem.java
@@ -70,7 +70,7 @@ public class RecoverySystem {
     private static File RECOVERY_DIR = new File("/cache/recovery");
     private static File COMMAND_FILE = new File(RECOVERY_DIR, "command");
     private static File LOG_FILE = new File(RECOVERY_DIR, "log");
-    private static String LAST_LOG_FILENAME = "last_log";
+    private static String LAST_PREFIX = "last_";
 
     // Length limits for reading files.
     private static int LOG_FILE_MAX_LENGTH = 64 * 1024;
@@ -415,10 +415,11 @@ public class RecoverySystem {
             Log.e(TAG, "Error reading recovery log", e);
         }
 
-        // Delete everything in RECOVERY_DIR except LAST_LOG_FILENAME
+        // Delete everything in RECOVERY_DIR except those beginning
+        // with LAST_PREFIX
         String[] names = RECOVERY_DIR.list();
         for (int i = 0; names != null && i < names.length; i++) {
-            if (names[i].equals(LAST_LOG_FILENAME)) continue;
+            if (names[i].startsWith(LAST_PREFIX)) continue;
             File f = new File(RECOVERY_DIR, names[i]);
             if (!f.delete()) {
                 Log.e(TAG, "Can't delete: " + f);