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- #include "libgsi/libgsi.h"
- #include <string.h>
- #include <unistd.h>
- #include <string>
- #include <android-base/file.h>
- #include <android-base/parseint.h>
- #include <android-base/unique_fd.h>
- #include "file_paths.h"
- #include "libgsi_private.h"
- namespace android {
- namespace gsi {
- using namespace std::literals;
- using android::base::unique_fd;
- bool IsGsiRunning() {
- return !access(kGsiBootedIndicatorFile, F_OK);
- }
- bool IsGsiInstalled() {
- return !access(kGsiInstallStatusFile, F_OK);
- }
- static bool WriteAndSyncFile(const std::string& data, const std::string& file) {
- unique_fd fd(open(file.c_str(), O_WRONLY | O_NOFOLLOW | O_CLOEXEC));
- if (fd < 0) {
- return false;
- }
- if (!android::base::WriteFully(fd, data.c_str(), data.size())) {
- return false;
- }
- return fsync(fd) == 0;
- }
- static bool CanBootIntoGsi(std::string* error) {
- if (!IsGsiInstalled()) {
- *error = "not detected";
- return false;
- }
- std::string boot_key;
- if (!GetInstallStatus(&boot_key)) {
- *error = "error ("s + strerror(errno) + ")";
- return false;
- }
-
- int attempts;
- if (GetBootAttempts(boot_key, &attempts)) {
- if (attempts + 1 > kMaxBootAttempts) {
- *error = "exceeded max boot attempts";
- return false;
- }
- std::string new_key;
- if (!access(kGsiOneShotBootFile, F_OK)) {
-
-
-
-
- new_key = kInstallStatusDisabled;
- } else {
- new_key = std::to_string(attempts + 1);
- }
- if (!WriteAndSyncFile(new_key, kGsiInstallStatusFile)) {
- *error = "error ("s + strerror(errno) + ")";
- return false;
- }
- return true;
- }
- if (boot_key != kInstallStatusOk) {
- *error = "not enabled";
- return false;
- }
- return true;
- }
- bool CanBootIntoGsi(std::string* metadata_file, std::string* error) {
-
-
-
- android::base::RemoveFileIfExists(kGsiBootedIndicatorFile);
- if (!CanBootIntoGsi(error)) {
- return false;
- }
- *metadata_file = kGsiLpMetadataFile;
- return true;
- }
- bool UninstallGsi() {
- return android::base::WriteStringToFile(kInstallStatusWipe, kGsiInstallStatusFile);
- }
- bool DisableGsi() {
- return android::base::WriteStringToFile(kInstallStatusDisabled, kGsiInstallStatusFile);
- }
- bool MarkSystemAsGsi() {
- return android::base::WriteStringToFile("1", kGsiBootedIndicatorFile);
- }
- bool GetInstallStatus(std::string* status) {
- return android::base::ReadFileToString(kGsiInstallStatusFile, status);
- }
- bool GetBootAttempts(const std::string& boot_key, int* attempts) {
- return android::base::ParseInt(boot_key, attempts);
- }
- }
- }
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