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-rw-r--r--recovery.cpp196
1 files changed, 86 insertions, 110 deletions
diff --git a/recovery.cpp b/recovery.cpp
index 9152bb128..0fdc31cb4 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -170,21 +170,7 @@ struct selabel_handle* sehandle;
* -- after this, rebooting will (try to) restart the main system --
* 7. ** if install failed **
* 7a. prompt_and_wait() shows an error icon and waits for the user
- * 7b; the user reboots (pulling the battery, etc) into the main system
- * 8. main() calls maybe_install_firmware_update()
- * ** if the update contained radio/hboot firmware **:
- * 8a. m_i_f_u() writes BCB with "boot-recovery" and "--wipe_cache"
- * -- after this, rebooting will reformat cache & restart main system --
- * 8b. m_i_f_u() writes firmware image into raw cache partition
- * 8c. m_i_f_u() writes BCB with "update-radio/hboot" and "--wipe_cache"
- * -- after this, rebooting will attempt to reinstall firmware --
- * 8d. bootloader tries to flash firmware
- * 8e. bootloader writes BCB with "boot-recovery" (keeping "--wipe_cache")
- * -- after this, rebooting will reformat cache & restart main system --
- * 8f. erase_volume() reformats /cache
- * 8g. finish_recovery() erases BCB
- * -- after this, rebooting will (try to) restart the main system --
- * 9. main() calls reboot() to boot main system
+ * 7b. the user reboots (pulling the battery, etc) into the main system
*/
// open a given path, mounting partitions as necessary
@@ -513,117 +499,107 @@ static void finish_recovery() {
sync(); // For good measure.
}
-typedef struct _saved_log_file {
- char* name;
- struct stat st;
- unsigned char* data;
- struct _saved_log_file* next;
-} saved_log_file;
+struct saved_log_file {
+ std::string name;
+ struct stat sb;
+ std::string data;
+};
static bool erase_volume(const char* volume) {
- bool is_cache = (strcmp(volume, CACHE_ROOT) == 0);
- bool is_data = (strcmp(volume, DATA_ROOT) == 0);
+ bool is_cache = (strcmp(volume, CACHE_ROOT) == 0);
+ bool is_data = (strcmp(volume, DATA_ROOT) == 0);
- ui->SetBackground(RecoveryUI::ERASING);
- ui->SetProgressType(RecoveryUI::INDETERMINATE);
+ ui->SetBackground(RecoveryUI::ERASING);
+ ui->SetProgressType(RecoveryUI::INDETERMINATE);
- saved_log_file* head = NULL;
-
- if (is_cache) {
- // If we're reformatting /cache, we load any past logs
- // (i.e. "/cache/recovery/last_*") and the current log
- // ("/cache/recovery/log") into memory, so we can restore them after
- // the reformat.
-
- ensure_path_mounted(volume);
-
- DIR* d;
- struct dirent* de;
- d = opendir(CACHE_LOG_DIR);
- if (d) {
- char path[PATH_MAX];
- strcpy(path, CACHE_LOG_DIR);
- strcat(path, "/");
- int path_len = strlen(path);
- while ((de = readdir(d)) != NULL) {
- if (strncmp(de->d_name, "last_", 5) == 0 || strcmp(de->d_name, "log") == 0) {
- saved_log_file* p = (saved_log_file*) malloc(sizeof(saved_log_file));
- strcpy(path+path_len, de->d_name);
- p->name = strdup(path);
- if (stat(path, &(p->st)) == 0) {
- // truncate files to 512kb
- if (p->st.st_size > (1 << 19)) {
- p->st.st_size = 1 << 19;
- }
- p->data = (unsigned char*) malloc(p->st.st_size);
- FILE* f = fopen(path, "rb");
- fread(p->data, 1, p->st.st_size, f);
- fclose(f);
- p->next = head;
- head = p;
- } else {
- free(p);
- }
- }
- }
- closedir(d);
- } else {
- if (errno != ENOENT) {
- printf("opendir failed: %s\n", strerror(errno));
+ std::vector<saved_log_file> log_files;
+
+ if (is_cache) {
+ // If we're reformatting /cache, we load any past logs
+ // (i.e. "/cache/recovery/last_*") and the current log
+ // ("/cache/recovery/log") into memory, so we can restore them after
+ // the reformat.
+
+ ensure_path_mounted(volume);
+
+ struct dirent* de;
+ std::unique_ptr<DIR, decltype(&closedir)> d(opendir(CACHE_LOG_DIR), closedir);
+ if (d) {
+ while ((de = readdir(d.get())) != nullptr) {
+ if (strncmp(de->d_name, "last_", 5) == 0 || strcmp(de->d_name, "log") == 0) {
+ std::string path = android::base::StringPrintf("%s/%s", CACHE_LOG_DIR, de->d_name);
+
+ struct stat sb;
+ if (stat(path.c_str(), &sb) == 0) {
+ // truncate files to 512kb
+ if (sb.st_size > (1 << 19)) {
+ sb.st_size = 1 << 19;
}
+
+ std::string data(sb.st_size, '\0');
+ FILE* f = fopen(path.c_str(), "rb");
+ fread(&data[0], 1, data.size(), f);
+ fclose(f);
+
+ log_files.emplace_back(saved_log_file{ path, sb, data });
+ }
}
+ }
+ } else {
+ if (errno != ENOENT) {
+ PLOG(ERROR) << "Failed to opendir " << CACHE_LOG_DIR;
+ }
}
+ }
- ui->Print("Formatting %s...\n", volume);
+ ui->Print("Formatting %s...\n", volume);
- ensure_path_unmounted(volume);
+ ensure_path_unmounted(volume);
- int result;
+ int result;
- if (is_data && reason && strcmp(reason, "convert_fbe") == 0) {
- // Create convert_fbe breadcrumb file to signal to init
- // to convert to file based encryption, not full disk encryption
- if (mkdir(CONVERT_FBE_DIR, 0700) != 0) {
- ui->Print("Failed to make convert_fbe dir %s\n", strerror(errno));
- return true;
- }
- FILE* f = fopen(CONVERT_FBE_FILE, "wb");
- if (!f) {
- ui->Print("Failed to convert to file encryption %s\n", strerror(errno));
- return true;
- }
- fclose(f);
- result = format_volume(volume, CONVERT_FBE_DIR);
- remove(CONVERT_FBE_FILE);
- rmdir(CONVERT_FBE_DIR);
- } else {
- result = format_volume(volume);
+ if (is_data && reason && strcmp(reason, "convert_fbe") == 0) {
+ // Create convert_fbe breadcrumb file to signal to init
+ // to convert to file based encryption, not full disk encryption
+ if (mkdir(CONVERT_FBE_DIR, 0700) != 0) {
+ ui->Print("Failed to make convert_fbe dir %s\n", strerror(errno));
+ return true;
}
+ FILE* f = fopen(CONVERT_FBE_FILE, "wb");
+ if (!f) {
+ ui->Print("Failed to convert to file encryption %s\n", strerror(errno));
+ return true;
+ }
+ fclose(f);
+ result = format_volume(volume, CONVERT_FBE_DIR);
+ remove(CONVERT_FBE_FILE);
+ rmdir(CONVERT_FBE_DIR);
+ } else {
+ result = format_volume(volume);
+ }
- if (is_cache) {
- while (head) {
- FILE* f = fopen_path(head->name, "wb");
- if (f) {
- fwrite(head->data, 1, head->st.st_size, f);
- fclose(f);
- chmod(head->name, head->st.st_mode);
- chown(head->name, head->st.st_uid, head->st.st_gid);
- }
- free(head->name);
- free(head->data);
- saved_log_file* temp = head->next;
- free(head);
- head = temp;
+ if (is_cache) {
+ // Re-create the log dir and write back the log entries.
+ if (ensure_path_mounted(CACHE_LOG_DIR) == 0 &&
+ dirCreateHierarchy(CACHE_LOG_DIR, 0777, nullptr, false, sehandle) == 0) {
+ for (const auto& log : log_files) {
+ if (!android::base::WriteStringToFile(log.data, log.name, log.sb.st_mode, log.sb.st_uid,
+ log.sb.st_gid)) {
+ PLOG(ERROR) << "Failed to write to " << log.name;
}
-
- // 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
- // log.
- tmplog_offset = 0;
- copy_logs();
+ }
+ } else {
+ PLOG(ERROR) << "Failed to mount / create " << CACHE_LOG_DIR;
}
- return (result == 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
+ // log.
+ tmplog_offset = 0;
+ copy_logs();
+ }
+
+ return (result == 0);
}
static int
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 16:13:43 +0100