diff options
Diffstat (limited to 'bootloader.cpp')
-rw-r--r-- | bootloader.cpp | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/bootloader.cpp b/bootloader.cpp deleted file mode 100644 index dad0bab30..000000000 --- a/bootloader.cpp +++ /dev/null @@ -1,134 +0,0 @@ -/* - * Copyright (C) 2008 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include <errno.h> -#include <fcntl.h> -#include <inttypes.h> -#include <stdio.h> -#include <string.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <unistd.h> - -#include <fs_mgr.h> - -#include <android-base/logging.h> -#include <android-base/unique_fd.h> - -#include "bootloader.h" -#include "roots.h" - -static int get_bootloader_message_block(bootloader_message* out, const Volume* v); -static int set_bootloader_message_block(const bootloader_message* in, const Volume* v); - -int get_bootloader_message(bootloader_message* out) { - Volume* v = volume_for_path("/misc"); - if (v == nullptr) { - LOG(ERROR) << "Cannot load volume /misc!"; - return -1; - } - if (strcmp(v->fs_type, "emmc") == 0) { - return get_bootloader_message_block(out, v); - } - LOG(ERROR) << "unknown misc partition fs_type \"" << v->fs_type << "\""; - return -1; -} - -int set_bootloader_message(const bootloader_message* in) { - Volume* v = volume_for_path("/misc"); - if (v == nullptr) { - LOG(ERROR) << "Cannot load volume /misc!"; - return -1; - } - if (strcmp(v->fs_type, "emmc") == 0) { - return set_bootloader_message_block(in, v); - } - LOG(ERROR) << "unknown misc partition fs_type \"" << v->fs_type << "\""; - return -1; -} - -// ------------------------------------ -// for misc partitions on block devices -// ------------------------------------ - -static void wait_for_device(const char* fn) { - int tries = 0; - int ret; - do { - ++tries; - struct stat buf; - ret = stat(fn, &buf); - if (ret == -1) { - printf("failed to stat \"%s\" try %d: %s\n", fn, tries, strerror(errno)); - sleep(1); - } - } while (ret && tries < 10); - - if (ret) { - printf("failed to stat \"%s\"\n", fn); - } -} - -static int get_bootloader_message_block(bootloader_message* out, - const Volume* v) { - wait_for_device(v->blk_device); - FILE* f = fopen(v->blk_device, "rb"); - if (f == nullptr) { - PLOG(ERROR) << "failed to open \"" << v->blk_device << "\""; - return -1; - } - bootloader_message temp; - int count = fread(&temp, sizeof(temp), 1, f); - if (count != 1) { - PLOG(ERROR) << "failed to read \"" << v->blk_device << "\""; - return -1; - } - if (fclose(f) != 0) { - PLOG(ERROR) << "failed to close \"" << v->blk_device << "\""; - return -1; - } - memcpy(out, &temp, sizeof(temp)); - return 0; -} - -static int set_bootloader_message_block(const bootloader_message* in, - const Volume* v) { - wait_for_device(v->blk_device); - android::base::unique_fd fd(open(v->blk_device, O_WRONLY | O_SYNC)); - if (fd == -1) { - PLOG(ERROR) << "failed to open \"" << v->blk_device << "\""; - return -1; - } - - size_t written = 0; - const uint8_t* start = reinterpret_cast<const uint8_t*>(in); - size_t total = sizeof(*in); - while (written < total) { - ssize_t wrote = TEMP_FAILURE_RETRY(write(fd, start + written, total - written)); - if (wrote == -1) { - PLOG(ERROR) << "failed to write " << total << " bytes, " << written - << " bytes written"; - return -1; - } - written += wrote; - } - - if (fsync(fd) == -1) { - PLOG(ERROR) << "failed to fsync \"" << v->blk_device << "\""; - return -1; - } - return 0; -} |