fix(libSceUserService): report an unrestricted age level

sceUserServiceGetAgeLevel reported 0. On a PS5 (firmware 13.60) the
value is the age of the user's parental restriction (0, 7, 12 and 15
measured) and 0xFFFFFFFF without one, so 0 is a user restricted to age
0. A user who is not logged in returns 0x80960009 (not logged in) with or
without an output, before the null output check.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

core/libs/prx/libSceUserService/Export.cpp

@@ -57,10 +57,14 @@ int APS5_VABI sceUserServiceGetAccessibilityZoomFollowFocus(int user_id, int32_t
 }
 
 int APS5_VABI sceUserServiceGetAgeLevel(int user_id, uint32_t* age_level) {
- if (age_level == nullptr || user_id != USER_SERVICE_INITIAL_USER_ID) {
+ if (user_id != USER_SERVICE_INITIAL_USER_ID) {
+  return USER_SERVICE_ERROR_NOT_LOGGED_IN;
+ }
+ if (age_level == nullptr) {
   return USER_SERVICE_ERROR_INVALID_ARGUMENT;
  }
- *age_level = 0;
+ constexpr std::uint32_t Unrestricted = 0xFFFFFFFFu;
+ *age_level = Unrestricted;
  return USER_SERVICE_OK;
 }
 

core/libs/prx/libSceUserService/UserService.hpp

@@ -7,6 +7,7 @@
 constexpr int USER_SERVICE_OK = 0;
 constexpr int USER_SERVICE_ERROR_INVALID_ARGUMENT = -2137653243;
 constexpr int USER_SERVICE_ERROR_NO_EVENT = -2137653241;
+constexpr int USER_SERVICE_ERROR_NOT_LOGGED_IN = -2137653239;
 constexpr int USER_SERVICE_USER_ID_INVALID = -1;
 constexpr int USER_SERVICE_INITIAL_USER_ID = 0x10000000;
 constexpr int USER_SERVICE_ERROR_BUFFER_TOO_SHORT = -2137653238;

core/libs/tests/GuestUserService.cpp

@@ -8,6 +8,7 @@ int APS5_VABI sceUserServiceGetForegroundUser(int* user_id);
 int APS5_VABI sceUserServiceGetRegisteredUserIdList(UserServiceRegisteredUserIdList* user_id_list);
 int APS5_VABI sceUserServiceGetUserColor(int user_id, int* color);
 int APS5_VABI sceUserServiceGetNpAccountId(int user_id, std::uint64_t* account_id);
+int APS5_VABI sceUserServiceGetAgeLevel(int user_id, std::uint32_t* age_level);
 }
 
 namespace {
@@ -41,4 +42,15 @@ int main() {
     Require(sceUserServiceGetNpAccountId(123, &account_id) == USER_SERVICE_ERROR_INVALID_ARGUMENT);
     Require(sceUserServiceGetNpAccountId(USER_SERVICE_INITIAL_USER_ID, &account_id) == USER_SERVICE_OK);
     Require(account_id == 0);
+
+    std::uint32_t age_level = 0x5a5a5a5au;
+    Require(sceUserServiceGetAgeLevel(USER_SERVICE_INITIAL_USER_ID, nullptr) == USER_SERVICE_ERROR_INVALID_ARGUMENT);
+    const int absent_users[] = {0, USER_SERVICE_USER_ID_INVALID, 0xff, 0x12345678};
+    for (int user_id : absent_users) {
+        Require(sceUserServiceGetAgeLevel(user_id, &age_level) == USER_SERVICE_ERROR_NOT_LOGGED_IN);
+        Require(age_level == 0x5a5a5a5au);
+        Require(sceUserServiceGetAgeLevel(user_id, nullptr) == USER_SERVICE_ERROR_NOT_LOGGED_IN);
+    }
+    Require(sceUserServiceGetAgeLevel(USER_SERVICE_INITIAL_USER_ID, &age_level) == USER_SERVICE_OK);
+    Require(age_level == 0xffffffffu);
 }

docs/dev/TechnicalDebt.md

@@ -274,7 +274,7 @@ Throughout the project, every function at every stage either **does exactly what
 - [libSceHttp2 cookie boxes](../../core/libs/prx/libSceHttp2/Export.cpp) (libSceHttp2) - `sceHttp2CreateCookieBox` is taken to take the library context id first, as in the [prosper](https://github.com/mattias800/prosper) reimplementation; further arguments are unknown and ignored. `sceHttp2SetRequestNoContentLength` is assumed to take only the request id. Cookies are never stored, so `sceHttp2CookieFlush` has nothing to discard
 - [sceNpSessionSignalingGetMemoryInfo](../../core/libs/prx/libSceNpSessionSignaling/Export.cpp) (libSceNpSessionSignaling) - unknown signature
 - [sceNpSessionSignalingGetConnectionStatistics](../../core/libs/prx/libSceNpSessionSignaling/Export.cpp) (libSceNpSessionSignaling) - unknown signature
-- [sceUserServiceGetAgeLevel](../../core/libs/prx/libSceUserService/Export.cpp) (libSceUserService) - the meaning of the value is unknown; 0 is reported, as for the unset game presets. PPSA12544 (Unity) only stores it for its user profile
+- [sceUserServiceGetAgeLevel](../../core/libs/prx/libSceUserService/Export.cpp) (libSceUserService) - on a PS5 (firmware 13.60) the value is the age set in the user's parental restriction (0, 7, 12 and 15 were measured) and `0xFFFFFFFF` without one; a user who is not logged in returns `0x80960009` with or without an output. Parental restrictions are not modelled, so the initial user is always reported as unrestricted. PPSA12544 (Unity) only stores the value for its user profile
 - [sceGameUpdateGetAddcontLatestVersion](../../core/libs/prx/libSceGameUpdate/Export.cpp) (libSceGameUpdate) - a null `entitlement_label` throws: KytyPS5 accepts it, prosper returns `0x80412803`. Bytes after `found` are zeroed as in KytyPS5; prosper leaves them untouched
 - [sceSystemServiceParamGetString](../../core/libs/prx/libSceSystemService/Export.cpp) (libSceSystemService) - the system name (parameter 6) is the fixed `PS5`, not the console's name; other parameters and buffers of 1 to 64 bytes throw
 - [sceSystemServiceParamGetInt](../../core/libs/prx/libSceSystemService/Export.cpp) (libSceSystemService) - console language numbers 0 to 29 follow the PS4 SDK enum in [OpenOrbis](https://github.com/OpenOrbis/OpenOrbis-PS4-Toolchain/blob/06fcf7fd108fa080035cdd3259ed22eb07e0508c/include/orbis/_types/sys_service.h#L54-L83) (21 Arabic). 30 (Ukrainian) is not in it and follows PPSA99505 ([Jelly5](https://github.com/02dnot/Jelly5/blob/552b866d89b2a58b27f7f7b0484dc743ce235526/app/src/app/i18n.cpp#L29-L60)) and PPSA99002 ([ProsperoLight](https://github.com/blackbearreloaded/ProsperoLight/blob/b708bbde3457bef1073a9ab6959957cb691e8e2f/include/i18n.hpp#L252-L309)), whose numbers agree with the enum. Not confirmed on a console, and neither title starts on `main` yet. Without `ANYPS5_LANGUAGE` the language is English (United States); the date format, time format, time zone, summer time and enter button stay fixed