1# phosphor-post-code-manager
2
3This phosphor-post-code-manager repository provides an infrastructure to persist the POST codes in BMC filesystem & it also owns
4the systemd services that are responsible for exposing the BIOS Post Codes to rest of the world via redfish.
5
6## To Build
7
8To build phosphor-post-code-manager package , do the following steps:
9
10``` bash
11meson <build directory>
12ninja -C <build directory>
13```
14
15## Hosted Services
16
17This repository ships `xyz.openbmc_project.State.Boot.PostCode.service` systemd service along with its [template version](https://github.com/openbmc/docs/blob/master/designs/multi-host-postcode.md) and a tiny binary that exposes the necessary [dbus interfaces & methods](https://github.com/openbmc/phosphor-dbus-interfaces/blob/master/yaml/xyz/openbmc_project/State/Boot/PostCode.interface.yaml) to extract the POST codes per boot cycle.
18
19## Architecture
20
21This repository is tightly coupled with [phosphor-host-postd](https://github.com/openbmc/phosphor-host-postd) OpenBMC respository which is responsible for emitting the dbus signals for every new POST Code.
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23phosphor-post-code-manager is architected to look for the property changed signals which are being emitted from the service that hosts [Value](https://github.com/openbmc/phosphor-dbus-interfaces/blob/master/yaml/xyz/openbmc_project/State/Boot/Raw.interface.yaml) property on `xyz.openbmc_project.State.Boot.Raw` interface & archive them per boot on the filesystem, so that those can be exposed over [redfish](https://github.com/openbmc/docs/blob/master/designs/redfish-postcodes.md)
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