API to read IM value from persisted location
This commit implements API to read IM value from PIM persisted
location.
Change-Id: I9cd4f6ed9ded2dd4f42c65902509f7bea9e15849
Signed-off-by: Anupama B R <anupama.b.r1@ibm.com>
diff --git a/vpd-manager/include/utility/json_utility.hpp b/vpd-manager/include/utility/json_utility.hpp
index 8a4ae44..55010ad 100644
--- a/vpd-manager/include/utility/json_utility.hpp
+++ b/vpd-manager/include/utility/json_utility.hpp
@@ -1088,5 +1088,46 @@
return nlohmann::json{};
}
}
+
+/** @brief API to get IM value from persisted data location.
+ *
+ * @return IM value on success, empty string otherwise.
+ */
+inline std::string getImFromPersistedLocation() noexcept
+{
+ std::string l_imFilePath{constants::pimPersistVsbpPath};
+
+ try
+ {
+ auto l_parsedVsbpJsonObj = getParsedJson(l_imFilePath);
+ if (!l_parsedVsbpJsonObj.contains("value0") ||
+ !l_parsedVsbpJsonObj["value0"].contains(constants::kwdIM) ||
+ !l_parsedVsbpJsonObj["value0"][constants::kwdIM].is_array())
+ {
+ throw std::runtime_error(
+ "Json is empty or mandatory tag(s) missing from JSON");
+ }
+
+ types::BinaryVector l_imValue =
+ l_parsedVsbpJsonObj["value0"][constants::kwdIM]
+ .get<types::BinaryVector>();
+
+ std::ostringstream l_imData;
+ for (auto& l_byte : l_imValue)
+ {
+ l_imData << std::setw(2) << std::setfill('0') << std::hex
+ << static_cast<int>(l_byte);
+ }
+ return l_imData.str();
+ }
+ catch (const std::exception& l_ex)
+ {
+ logging::logMessage(
+ "Error while getting IM value from PIM persisted file: " +
+ l_imFilePath + ", reason: " + std::string(l_ex.what()));
+ }
+
+ return std::string();
+}
} // namespace jsonUtility
} // namespace vpd