commit b24113032453cbb7f3eda20869428b6021e38a7e
author Willy Tu <wltu@google.com> Thu Nov 03 08:49:51 2022 +0000
committer Willy Tu <wltu@google.com> Mon Aug 28 14:11:49 2023 +0000
tree 048b24812d98e53b881525eb75a46a0014d7e386
parent 2f0a6d034c1fe9c6ecd844e8cd42449073c91a98

ipmid: fru-reader: Use timegm instead of mktime

timegm is the inverse of gmtime. Currently, we are missing UTC time with
localtime when converting between timestamp and time string. This is not
an issue when the localtime is the same as UTC.

This issue is detected when we change the timezone to PST/PDT with
https://gerrit.openbmc.org/c/openbmc/openbmc/+/58293
and the FRU EEPROM time does not match the expected Mfg Date anymore.

Required:
https://gerrit.openbmc.org/c/openbmc/ipmi-fru-parser/+/58446

Tested:
Fru EEPROM Mfg Time now is in the same (after timezone conversion)
between the raw data and FRU output.

Change-Id: I4c636b0044e1b2a6dd2c078b62f65665d4b1108c
Signed-off-by: Willy Tu <wltu@google.com>

ipmi_fru_info_area.cpp

diff --git a/ipmi_fru_info_area.cpp b/ipmi_fru_info_area.cpp
index a970467..ec3f80d 100644
--- a/ipmi_fru_info_area.cpp
+++ b/ipmi_fru_info_area.cpp
@@ -216,7 +216,7 @@
         }
     }
 
-    return std::mktime(&time);
+    return timegm(&time);
 }
 
 /**