loggerd: log HW-specific extras (#28084)

* loggerd: log HW-specific extras

* fix value

---------

Co-authored-by: Comma Device <device@comma.ai>
old-commit-hash: e24d28fd45

system/hardware/base.h

@@ -18,6 +18,10 @@ public:
 
   static std::string get_serial() { return "cccccc"; }
 
+  static std::map<std::string, std::string> get_init_logs() {
+    return {};
+  }
+
   static void reboot() {}
   static void poweroff() {}
   static void set_brightness(int percent) {}

system/hardware/tici/hardware.h

@@ -73,6 +73,13 @@ public:
     std::system(("pactl set-sink-volume @DEFAULT_SINK@ " + std::string(volume_str)).c_str());
   }
 
+
+  static std::map<std::string, std::string> get_init_logs() {
+    return {
+      {"/BUILD", util::read_file("/BUILD")},
+    };
+  }
+
   static bool get_ssh_enabled() { return Params().getBool("SshEnabled"); };
   static void set_ssh_enabled(bool enabled) { Params().putBool("SshEnabled", enabled); };
 };

system/loggerd/logger.cc

@@ -70,7 +70,9 @@ kj::Array<capnp::word> logger_build_init_data() {
     "df -h",  // usage for all filesystems
   };
 
-  auto commands = init.initCommands().initEntries(log_commands.size());
+  auto hw_logs = Hardware::get_init_logs();
+
+  auto commands = init.initCommands().initEntries(log_commands.size() + hw_logs.size());
   for (int i = 0; i < log_commands.size(); i++) {
     auto lentry = commands[i];
 
@@ -80,6 +82,14 @@ kj::Array<capnp::word> logger_build_init_data() {
     lentry.setValue(capnp::Data::Reader((const kj::byte*)result.data(), result.size()));
   }
 
+  int i = log_commands.size();
+  for (auto [key, value] : hw_logs) {
+    auto lentry = commands[i];
+    lentry.setKey(key);
+    lentry.setValue(capnp::Data::Reader((const kj::byte*)value.data(), value.size()));
+    i++;
+  }
+
   return capnp::messageToFlatArray(msg);
 }