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-rw-r--r--uncrypt/Android.mk12
-rw-r--r--uncrypt/bootloader_message_writer.cpp107
-rw-r--r--uncrypt/include/bootloader_message_writer.h35
-rw-r--r--uncrypt/uncrypt.cpp51
4 files changed, 160 insertions, 45 deletions
diff --git a/uncrypt/Android.mk b/uncrypt/Android.mk
index 6422cb2f4..09cfdfca5 100644
--- a/uncrypt/Android.mk
+++ b/uncrypt/Android.mk
@@ -15,6 +15,15 @@
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
+LOCAL_CLANG := true
+LOCAL_SRC_FILES := bootloader_message_writer.cpp
+LOCAL_MODULE := libbootloader_message_writer
+LOCAL_STATIC_LIBRARIES := libbase libfs_mgr
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/..
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
+include $(BUILD_STATIC_LIBRARY)
+
+include $(CLEAR_VARS)
LOCAL_CLANG := true
@@ -24,7 +33,8 @@ LOCAL_C_INCLUDES := $(LOCAL_PATH)/..
LOCAL_MODULE := uncrypt
-LOCAL_STATIC_LIBRARIES := libbase liblog libfs_mgr libcutils
+LOCAL_STATIC_LIBRARIES := libbootloader_message_writer libbase \
+ liblog libfs_mgr libcutils \
LOCAL_INIT_RC := uncrypt.rc
diff --git a/uncrypt/bootloader_message_writer.cpp b/uncrypt/bootloader_message_writer.cpp
new file mode 100644
index 000000000..3bb106aa0
--- /dev/null
+++ b/uncrypt/bootloader_message_writer.cpp
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/system_properties.h>
+
+#include <string>
+#include <vector>
+
+#include <android-base/file.h>
+#include <android-base/stringprintf.h>
+#include <android-base/unique_fd.h>
+#include <fs_mgr.h>
+
+#include "bootloader.h"
+
+static struct fstab* read_fstab(std::string* err) {
+ // The fstab path is always "/fstab.${ro.hardware}".
+ std::string fstab_path = "/fstab.";
+ char value[PROP_VALUE_MAX];
+ if (__system_property_get("ro.hardware", value) == 0) {
+ *err = "failed to get ro.hardware";
+ return nullptr;
+ }
+ fstab_path += value;
+ struct fstab* fstab = fs_mgr_read_fstab(fstab_path.c_str());
+ if (fstab == nullptr) {
+ *err = "failed to read " + fstab_path;
+ }
+ return fstab;
+}
+
+static std::string get_misc_blk_device(std::string* err) {
+ struct fstab* fstab = read_fstab(err);
+ if (fstab == nullptr) {
+ return "";
+ }
+ fstab_rec* record = fs_mgr_get_entry_for_mount_point(fstab, "/misc");
+ if (record == nullptr) {
+ *err = "failed to find /misc partition";
+ return "";
+ }
+ return record->blk_device;
+}
+
+static bool write_bootloader_message(const bootloader_message& boot, std::string* err) {
+ std::string misc_blk_device = get_misc_blk_device(err);
+ if (misc_blk_device.empty()) {
+ return false;
+ }
+ android::base::unique_fd fd(open(misc_blk_device.c_str(), O_WRONLY | O_SYNC));
+ if (fd.get() == -1) {
+ *err = android::base::StringPrintf("failed to open %s: %s", misc_blk_device.c_str(),
+ strerror(errno));
+ return false;
+ }
+ if (!android::base::WriteFully(fd.get(), &boot, sizeof(boot))) {
+ *err = android::base::StringPrintf("failed to write %s: %s", misc_blk_device.c_str(),
+ strerror(errno));
+ return false;
+ }
+ // TODO: O_SYNC and fsync duplicates each other?
+ if (fsync(fd.get()) == -1) {
+ *err = android::base::StringPrintf("failed to fsync %s: %s", misc_blk_device.c_str(),
+ strerror(errno));
+ return false;
+ }
+ return true;
+}
+
+bool clear_bootloader_message(std::string* err) {
+ bootloader_message boot = {};
+ return write_bootloader_message(boot, err);
+}
+
+bool write_bootloader_message(const std::vector<std::string>& options, std::string* err) {
+ bootloader_message boot = {};
+ strlcpy(boot.command, "boot-recovery", sizeof(boot.command));
+ strlcpy(boot.recovery, "recovery\n", sizeof(boot.recovery));
+ for (const auto& s : options) {
+ strlcat(boot.recovery, s.c_str(), sizeof(boot.recovery));
+ if (s.back() != '\n') {
+ strlcat(boot.recovery, "\n", sizeof(boot.recovery));
+ }
+ }
+ return write_bootloader_message(boot, err);
+}
+
+extern "C" bool write_bootloader_message(const char* options) {
+ std::string err;
+ return write_bootloader_message({options}, &err);
+}
diff --git a/uncrypt/include/bootloader_message_writer.h b/uncrypt/include/bootloader_message_writer.h
new file mode 100644
index 000000000..e0ca3f44a
--- /dev/null
+++ b/uncrypt/include/bootloader_message_writer.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#ifndef BOOTLOADER_MESSAGE_WRITER_H
+#define BOOTLOADER_MESSAGE_WRITER_H
+
+#ifdef __cplusplus
+#include <string>
+#include <vector>
+
+bool clear_bootloader_message(std::string* err);
+
+bool write_bootloader_message(const std::vector<std::string>& options, std::string* err);
+
+#else
+#include <stdbool.h>
+
+// C Interface.
+bool write_bootloader_message(const char* options);
+#endif
+
+#endif // BOOTLOADER_MESSAGE_WRITER_H
diff --git a/uncrypt/uncrypt.cpp b/uncrypt/uncrypt.cpp
index f569bcedc..0e14da13f 100644
--- a/uncrypt/uncrypt.cpp
+++ b/uncrypt/uncrypt.cpp
@@ -110,6 +110,7 @@
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <android-base/unique_fd.h>
+#include <bootloader_message_writer.h>
#include <cutils/android_reboot.h>
#include <cutils/properties.h>
#include <cutils/sockets.h>
@@ -118,8 +119,6 @@
#define LOG_TAG "uncrypt"
#include <log/log.h>
-#include "bootloader.h"
-
#define WINDOW_SIZE 5
// uncrypt provides three services: SETUP_BCB, CLEAR_BCB and UNCRYPT.
@@ -412,40 +411,6 @@ static int produce_block_map(const char* path, const char* map_file, const char*
return 0;
}
-static std::string get_misc_blk_device() {
- if (fstab == nullptr) {
- return "";
- }
- struct fstab_rec* rec = fs_mgr_get_entry_for_mount_point(fstab, "/misc");
- if (rec != nullptr) {
- return rec->blk_device;
- }
- return "";
-}
-
-static int write_bootloader_message(const bootloader_message* in) {
- std::string misc_blk_device = get_misc_blk_device();
- if (misc_blk_device.empty()) {
- ALOGE("failed to find /misc partition.");
- return -1;
- }
- android::base::unique_fd fd(open(misc_blk_device.c_str(), O_WRONLY | O_SYNC));
- if (fd == -1) {
- ALOGE("failed to open %s: %s", misc_blk_device.c_str(), strerror(errno));
- return -1;
- }
- if (!android::base::WriteFully(fd, in, sizeof(*in))) {
- ALOGE("failed to write %s: %s", misc_blk_device.c_str(), strerror(errno));
- return -1;
- }
- // TODO: O_SYNC and fsync() duplicates each other?
- if (fsync(fd) == -1) {
- ALOGE("failed to fsync %s: %s", misc_blk_device.c_str(), strerror(errno));
- return -1;
- }
- return 0;
-}
-
static int uncrypt(const char* input_path, const char* map_file, const int socket) {
ALOGI("update package is \"%s\"", input_path);
@@ -508,8 +473,9 @@ static bool uncrypt_wrapper(const char* input_path, const char* map_file, const
}
static bool clear_bcb(const int socket) {
- bootloader_message boot = {};
- if (write_bootloader_message(&boot) != 0) {
+ std::string err;
+ if (!clear_bootloader_message(&err)) {
+ ALOGE("failed to clear bootloader message: %s", err.c_str());
write_status_to_socket(-1, socket);
return false;
}
@@ -536,12 +502,9 @@ static bool setup_bcb(const int socket) {
ALOGI(" received command: [%s] (%zu)", content.c_str(), content.size());
// c8. setup the bcb command
- bootloader_message boot = {};
- strlcpy(boot.command, "boot-recovery", sizeof(boot.command));
- strlcpy(boot.recovery, "recovery\n", sizeof(boot.recovery));
- strlcat(boot.recovery, content.c_str(), sizeof(boot.recovery));
- if (write_bootloader_message(&boot) != 0) {
- ALOGE("failed to set bootloader message");
+ std::string err;
+ if (!write_bootloader_message({content}, &err)) {
+ ALOGE("failed to set bootloader message: %s", err.c_str());
write_status_to_socket(-1, socket);
return false;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 03:38:37 +0100