blob: 483cd7a2d72ded77215e3df115a7e0678cc962aa [file] [log] [blame]
#include "config.h"
#include "serialize.hpp"
#include <cereal/archives/json.hpp>
#include <experimental/filesystem>
#include <fstream>
#include <phosphor-logging/log.hpp>
#include <sdbusplus/server.hpp>
namespace phosphor
{
namespace software
{
namespace updater
{
using namespace phosphor::logging;
namespace fs = std::experimental::filesystem;
const std::string priorityName = "priority";
void storePriority(const std::string& versionId, uint8_t priority)
{
auto path = fs::path(PERSIST_DIR) / versionId;
if (!fs::is_directory(path))
{
if (fs::exists(path))
{
// Delete if it's a non-directory file
log<level::WARNING>("Removing non-directory file",
entry("PATH=%s", path.c_str()));
fs::remove_all(path);
}
fs::create_directories(path);
}
path = path / priorityName;
std::ofstream os(path.c_str());
cereal::JSONOutputArchive oarchive(os);
oarchive(cereal::make_nvp(priorityName, priority));
}
bool restorePriority(const std::string& versionId, uint8_t& priority)
{
auto path = fs::path(PERSIST_DIR) / versionId / priorityName;
if (fs::exists(path))
{
std::ifstream is(path.c_str(), std::ios::in);
try
{
cereal::JSONInputArchive iarchive(is);
iarchive(cereal::make_nvp(priorityName, priority));
return true;
}
catch (cereal::Exception& e)
{
fs::remove_all(path);
}
}
// Find the mtd device "u-boot-env" to retrieve the environment variables
std::ifstream mtdDevices("/proc/mtd");
std::string device, devicePath;
try
{
while (std::getline(mtdDevices, device))
{
if (device.find("u-boot-env") != std::string::npos)
{
devicePath = "/dev/" + device.substr(0, device.find(':'));
break;
}
}
if (!devicePath.empty())
{
std::ifstream input(devicePath.c_str());
std::string envVars;
std::getline(input, envVars);
std::string versionVar = versionId + "=";
auto varPosition = envVars.find(versionVar);
if (varPosition != std::string::npos)
{
// Grab the environment variable for this versionId. These
// variables follow the format "versionId=priority\0"
auto var = envVars.substr(varPosition);
priority = std::stoi(var.substr(versionVar.length()));
return true;
}
}
}
catch (const std::exception& e)
{
}
return false;
}
void removePersistDataDirectory(const std::string& versionId)
{
auto path = fs::path(PERSIST_DIR) / versionId;
if (fs::exists(path))
{
fs::remove_all(path);
}
}
} // namespace updater
} // namespace software
} // namespace phosphor