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-rw-r--r--recovery.cpp37
1 files changed, 28 insertions, 9 deletions
diff --git a/recovery.cpp b/recovery.cpp
index 0ba4d1e27..2f8654a84 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -92,6 +92,7 @@ char* locale = NULL;
char recovery_version[PROPERTY_VALUE_MAX+1];
char* stage = NULL;
char* reason = NULL;
+bool modified_flash = false;
/*
* The recovery tool communicates with the main system through /cache files.
@@ -337,13 +338,18 @@ copy_log_file(const char* source, const char* destination, int append) {
// Rename last_log -> last_log.1 -> last_log.2 -> ... -> last_log.$max
// Overwrites any existing last_log.$max.
-static void
-rotate_last_logs(int max) {
+static void rotate_last_logs(int max) {
+ // Logs should only be rotated once.
+ static bool rotated = false;
+ if (rotated) {
+ return;
+ }
+ rotated = true;
+ ensure_path_mounted(LAST_LOG_FILE);
+
char oldfn[256];
char newfn[256];
-
- int i;
- for (i = max-1; i >= 0; --i) {
+ for (int i = max-1; i >= 0; --i) {
snprintf(oldfn, sizeof(oldfn), (i==0) ? LAST_LOG_FILE : (LAST_LOG_FILE ".%d"), i);
snprintf(newfn, sizeof(newfn), LAST_LOG_FILE ".%d", i+1);
// ignore errors
@@ -351,8 +357,17 @@ rotate_last_logs(int max) {
}
}
-static void
-copy_logs() {
+static void copy_logs() {
+ // We only rotate and record the log of the current session if there are
+ // actual attempts to modify the flash, such as wipes, installs from BCB
+ // or menu selections. This is to avoid unnecessary rotation (and
+ // possible deletion) of log files, if it does not do anything loggable.
+ if (!modified_flash) {
+ return;
+ }
+
+ rotate_last_logs(KEEP_LOG_COUNT);
+
// Copy logs to cache so the system can find out what happened.
copy_log_file(TEMPORARY_LOG_FILE, LOG_FILE, true);
copy_log_file(TEMPORARY_LOG_FILE, LAST_LOG_FILE, false);
@@ -692,6 +707,8 @@ static bool wipe_data(int should_confirm, Device* device) {
return false;
}
+ modified_flash = true;
+
ui->Print("\n-- Wiping data...\n");
if (device->WipeData() == 0 && erase_volume("/data") == 0 && erase_volume("/cache") == 0) {
ui->Print("Data wipe complete.\n");
@@ -708,6 +725,8 @@ static bool wipe_cache(bool should_confirm, Device* device) {
return false;
}
+ modified_flash = true;
+
ui->Print("\n-- Wiping cache...\n");
if (erase_volume("/cache") == 0) {
ui->Print("Cache wipe complete.\n");
@@ -816,6 +835,8 @@ static void choose_recovery_file(Device* device) {
}
static int apply_from_sdcard(Device* device, bool* wipe_cache) {
+ modified_flash = true;
+
if (ensure_path_mounted(SDCARD_ROOT) != 0) {
ui->Print("\n-- Couldn't mount %s.\n", SDCARD_ROOT);
return INSTALL_ERROR;
@@ -990,8 +1011,6 @@ main(int argc, char **argv) {
printf("Starting recovery (pid %d) on %s", getpid(), ctime(&start));
load_volume_table();
- ensure_path_mounted(LAST_LOG_FILE);
- rotate_last_logs(KEEP_LOG_COUNT);
get_args(&argc, &argv);
const char *send_intent = NULL;