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-rw-r--r--bootloader_message/bootloader_message.cpp21
-rw-r--r--bootloader_message/include/bootloader_message/bootloader_message.h7
-rw-r--r--recovery.cpp23
-rw-r--r--tests/component/bootloader_message_test.cpp26
4 files changed, 65 insertions, 12 deletions
diff --git a/bootloader_message/bootloader_message.cpp b/bootloader_message/bootloader_message.cpp
index 9a5671843..b873d3dc3 100644
--- a/bootloader_message/bootloader_message.cpp
+++ b/bootloader_message/bootloader_message.cpp
@@ -176,6 +176,27 @@ bool write_bootloader_message(const std::vector<std::string>& options, std::stri
return write_bootloader_message(boot, err);
}
+bool update_bootloader_message(const std::vector<std::string>& options, std::string* err) {
+ bootloader_message boot;
+ if (!read_bootloader_message(&boot, err)) {
+ return false;
+ }
+
+ // Zero out the entire fields.
+ memset(boot.command, 0, sizeof(boot.command));
+ memset(boot.recovery, 0, sizeof(boot.recovery));
+
+ 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);
+}
+
bool write_reboot_bootloader(std::string* err) {
bootloader_message boot;
if (!read_bootloader_message(&boot, err)) {
diff --git a/bootloader_message/include/bootloader_message/bootloader_message.h b/bootloader_message/include/bootloader_message/bootloader_message.h
index ec47facf6..bc5104ddf 100644
--- a/bootloader_message/include/bootloader_message/bootloader_message.h
+++ b/bootloader_message/include/bootloader_message/bootloader_message.h
@@ -194,9 +194,14 @@ bool write_bootloader_message(const bootloader_message& boot, std::string* err);
bool write_bootloader_message_to(const bootloader_message& boot,
const std::string& misc_blk_device, std::string* err);
-// Write bootloader message (boots into recovery with the options) to BCB.
+// Write bootloader message (boots into recovery with the options) to BCB. Will
+// set the command and recovery fields, and reset the rest.
bool write_bootloader_message(const std::vector<std::string>& options, std::string* err);
+// Update bootloader message (boots into recovery with the options) to BCB. Will
+// only update the command and recovery fields.
+bool update_bootloader_message(const std::vector<std::string>& options, std::string* err);
+
// Clear BCB.
bool clear_bootloader_message(std::string* err);
diff --git a/recovery.cpp b/recovery.cpp
index 0fdc31cb4..0da3946bb 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -354,20 +354,21 @@ static std::vector<std::string> get_args(const int argc, char** const argv) {
// bootloader control block. So the device will always boot into recovery to
// finish the pending work, until finish_recovery() is called.
std::vector<std::string> options(args.cbegin() + 1, args.cend());
- if (!write_bootloader_message(options, &err)) {
- LOG(ERROR) << err;
+ if (!update_bootloader_message(options, &err)) {
+ LOG(ERROR) << "Failed to set BCB message: " << err;
}
return args;
}
-static void
-set_sdcard_update_bootloader_message() {
- std::vector<std::string> options;
- std::string err;
- if (!write_bootloader_message(options, &err)) {
- LOG(ERROR) << err;
- }
+// Set the BCB to reboot back into recovery (it won't resume the install from
+// sdcard though).
+static void set_sdcard_update_bootloader_message() {
+ std::vector<std::string> options;
+ std::string err;
+ if (!update_bootloader_message(options, &err)) {
+ LOG(ERROR) << "Failed to set BCB message: " << err;
+ }
}
// Read from kernel log into buffer and write out to file.
@@ -485,7 +486,7 @@ static void finish_recovery() {
// Reset to normal system boot so recovery won't cycle indefinitely.
std::string err;
if (!clear_bootloader_message(&err)) {
- LOG(ERROR) << err;
+ LOG(ERROR) << "Failed to clear BCB message: " << err;
}
// Remove the command file, so recovery won't repeat indefinitely.
@@ -1323,7 +1324,7 @@ static void set_retry_bootloader_message(int retry_count, int argc, char** argv)
// Increment the retry counter by 1.
options.push_back(android::base::StringPrintf("--retry_count=%d", retry_count+1));
std::string err;
- if (!write_bootloader_message(options, &err)) {
+ if (!update_bootloader_message(options, &err)) {
LOG(ERROR) << err;
}
}
diff --git a/tests/component/bootloader_message_test.cpp b/tests/component/bootloader_message_test.cpp
index cff129cfc..dbcaf619e 100644
--- a/tests/component/bootloader_message_test.cpp
+++ b/tests/component/bootloader_message_test.cpp
@@ -137,3 +137,29 @@ TEST_F(BootloaderMessageTest, write_bootloader_message_options_long) {
ASSERT_EQ(std::string(sizeof(boot.reserved), '\0'),
std::string(boot.reserved, sizeof(boot.reserved)));
}
+
+TEST_F(BootloaderMessageTest, update_bootloader_message) {
+ // Inject some bytes into boot, which should be not overwritten later.
+ bootloader_message boot;
+ strlcpy(boot.recovery, "random message", sizeof(boot.recovery));
+ strlcpy(boot.reserved, "reserved bytes", sizeof(boot.reserved));
+ std::string err;
+ ASSERT_TRUE(write_bootloader_message(boot, &err)) << "Failed to write BCB: " << err;
+
+ // Update the BCB message.
+ std::vector<std::string> options = { "option1", "option2" };
+ ASSERT_TRUE(update_bootloader_message(options, &err)) << "Failed to update BCB: " << err;
+
+ bootloader_message boot_verify;
+ ASSERT_TRUE(read_bootloader_message(&boot_verify, &err)) << "Failed to read BCB: " << err;
+
+ // Verify that command and recovery fields should be set.
+ ASSERT_EQ("boot-recovery", std::string(boot_verify.command));
+ std::string expected = "recovery\n" + android::base::Join(options, "\n") + "\n";
+ ASSERT_EQ(expected, std::string(boot_verify.recovery));
+
+ // The rest should be intact.
+ ASSERT_EQ(std::string(boot.status), std::string(boot_verify.status));
+ ASSERT_EQ(std::string(boot.stage), std::string(boot_verify.stage));
+ ASSERT_EQ(std::string(boot.reserved), std::string(boot_verify.reserved));
+}