fix: use getuser() syscall for determining username rather than session.toml hack

programs/include/montauk/user.h

@@ -297,10 +297,10 @@ namespace user {
         return false;
     }
 
-    // ---- Session (current logged-in user) ----
+    // ---- Session state and current user helpers ----
 
-    // Write the current session after successful login.
+    // Persist login session state after successful login.
-    // Stores username in 0:/config/session.toml so any app can query it.
+    // Current processes should use getuser() for their active username.
     inline void set_session(const char* username) {
         montauk::toml::Doc doc;
         doc.init();
@@ -314,19 +314,14 @@ namespace user {
         montauk::fdelete("0:/config/session.toml");
     }
 
-    // Read the current username into buf. Returns true if a session exists.
+    // Read the current process username into buf. Returns true if one is set.
     inline bool get_session_username(char* buf, int bufSz) {
-        auto doc = config::load("session");
+        if (buf == nullptr || bufSz <= 0) return false;
-        const char* name = doc.get_string("session.username", "");
+        int len = montauk::getuser(buf, (uint64_t)bufSz);
-        bool found = (name[0] != '\0');
+        return len > 0 && buf[0] != '\0';
-        if (found) {
-            montauk::strncpy(buf, name, bufSz);
-        }
-        doc.destroy();
-        return found;
     }
 
-    // Get the current user's home directory. Returns true if a session exists.
+    // Get the current process user's home directory. Returns true if a user is set.
     inline bool get_home_dir(char* buf, int bufSz) {
         char username[32];
         if (!get_session_username(username, sizeof(username))) return false;

programs/src/login/main.cpp

@@ -509,7 +509,7 @@ static bool try_login(LoginState* ls) {
         return false;
     }
 
-    // Write session so any app can query the current user
+    // Persist login session state for the active desktop session.
     montauk::user::set_session(ls->username);
     return true;
 }

programs/src/mtkfetch/main.cpp

@@ -7,7 +7,6 @@
 #include <montauk/syscall.h>
 #include <montauk/string.h>
 #include <montauk/heap.h>
-#include <montauk/config.h>
 
 // ==== ANSI color codes ====
 
@@ -81,8 +80,11 @@ extern "C" void _start() {
     Montauk::SysInfo sysinfo;
     montauk::get_info(&sysinfo);
 
-    auto doc = montauk::config::load("session");
+    const char* username = "user";
-    const char* username = doc.get_string("session.username", "user");
+    char username_buf[32] = {};
+    if (montauk::getuser(username_buf, sizeof(username_buf)) > 0 && username_buf[0]) {
+        username = username_buf;
+    }
 
     uint64_t ms = montauk::get_milliseconds();
     uint64_t total_secs = ms / 1000;
@@ -260,8 +262,6 @@ extern "C" void _start() {
         p = app(p, RST);
     }
 
-    doc.destroy();
-
     // ==== Print output ====
 
     montauk::putchar('\n');

programs/src/music/main.cpp

@@ -1500,20 +1500,14 @@ extern "C" void _start() {
     music_visualizer::reset(g.visualizer);
 
     // Parse arguments: accept a directory path or a file path
-    // Helper: set dir_path to current user's home via session config
+    // Helper: set dir_path to current user's home directory
     auto set_user_home = [&]() {
-        auto doc = montauk::config::load("session");
+        char username[32] = {};
-        const char* name = doc.get_string("session.username", "");
+        if (montauk::getuser(username, sizeof(username)) > 0 && username[0]) {
-        if (name[0]) {
+            snprintf(g.dir_path, sizeof(g.dir_path), "0:/users/%s", username);
-            int p = 0;
-            const char* pfx = "0:/users/";
-            while (*pfx && p < (int)sizeof(g.dir_path) - 1) g.dir_path[p++] = *pfx++;
-            while (*name && p < (int)sizeof(g.dir_path) - 1) g.dir_path[p++] = *name++;
-            g.dir_path[p] = '\0';
         } else {
             memcpy(g.dir_path, "0:/home", 8);
         }
-        doc.destroy();
     };
 
     char arg_file[128] = {};

programs/src/screenshot/main.cpp

@@ -8,7 +8,6 @@
 #include <montauk/syscall.h>
 #include <montauk/string.h>
 #include <montauk/heap.h>
-#include <montauk/config.h>
 
 extern "C" {
 #include <string.h>
@@ -114,18 +113,11 @@ extern "C" void _start() {
 
     // Build output path: 0:/users/<username>/Pictures/screenshot_YYYYMMDD_HHMMSS.jpg
     char username[32] = {};
-    {
+    if (montauk::getuser(username, sizeof(username)) <= 0 || username[0] == '\0') {
-        auto doc = montauk::config::load("session");
-        const char* name = doc.get_string("session.username", "");
-        if (name[0] == '\0') {
-            doc.destroy();
         montauk::mfree(jpeg.data);
         montauk::print("screenshot: no user session\n");
         montauk::exit(1);
     }
-        montauk::strncpy(username, name, sizeof(username) - 1);
-        doc.destroy();
-    }
 
     char home[128];
     snprintf(home, sizeof(home), "0:/users/%s", username);

programs/src/video/main.cpp

@@ -7,7 +7,6 @@
 #include <montauk/syscall.h>
 #include <montauk/string.h>
 #include <montauk/heap.h>
-#include <montauk/config.h>
 #include <gui/gui.hpp>
 #include <gui/standalone.hpp>
 #include <gui/truetype.hpp>
@@ -1255,19 +1254,17 @@ static bool handle_key(const Montauk::KeyEvent& key, bool& quit) {
 }
 
 static void set_default_dir() {
-    auto doc = montauk::config::load("session");
+    char username[32] = {};
-    const char* name = doc.get_string("session.username", "");
+    if (montauk::getuser(username, sizeof(username)) > 0 && username[0]) {
-    if (name[0]) {
+        snprintf(g.dir_path, sizeof(g.dir_path), "0:/users/%s/Videos", username);
-        snprintf(g.dir_path, sizeof(g.dir_path), "0:/users/%s/Videos", name);
         const char* probe[1];
         int ok = montauk::readdir(g.dir_path, probe, 1);
         if (ok < 0) {
-            snprintf(g.dir_path, sizeof(g.dir_path), "0:/users/%s", name);
+            snprintf(g.dir_path, sizeof(g.dir_path), "0:/users/%s", username);
         }
     } else {
         montauk::strncpy(g.dir_path, "0:/home", (int)sizeof(g.dir_path));
     }
-    doc.destroy();
 }
 
 static void parse_args(char* auto_file, int auto_file_cap) {

template/docs/syscalls.md

@@ -519,11 +519,11 @@ bool config::unset(toml::Doc* doc, const char* key);
 ### Example
 
 ```cpp
-auto doc = montauk::config::load("session");
+auto doc = montauk::config::load("desktop");
-const char* user = doc.get_string("session.username", "guest");
+const char* theme = doc.get_string("appearance.theme", "light");
 
-montauk::config::set_string(&doc, "session.theme", "dark");
+montauk::config::set_string(&doc, "appearance.theme", "dark");
-montauk::config::save("session", &doc);
+montauk::config::save("desktop", &doc);
 ```
 
 ---
@@ -543,8 +543,8 @@ bool user::change_password(const char* username, const char* new_password);
 
 void user::set_session(const char* username);         // Log in
 void user::clear_session();                           // Log out
-bool user::get_session_username(char* buf, int sz);   // Get current user
+bool user::get_session_username(char* buf, int sz);   // Get current process user
-bool user::get_home_dir(char* buf, int sz);           // Get user's home directory
+bool user::get_home_dir(char* buf, int sz);           // Get current process home directory
 ```
 
 ---

template/sysroot/include/montauk/user.h

@@ -297,10 +297,10 @@ namespace user {
         return false;
     }
 
-    // ---- Session (current logged-in user) ----
+    // ---- Session state and current user helpers ----
 
-    // Write the current session after successful login.
+    // Persist login session state after successful login.
-    // Stores username in 0:/config/session.toml so any app can query it.
+    // Current processes should use getuser() for their active username.
     inline void set_session(const char* username) {
         montauk::toml::Doc doc;
         doc.init();
@@ -314,19 +314,14 @@ namespace user {
         montauk::fdelete("0:/config/session.toml");
     }
 
-    // Read the current username into buf. Returns true if a session exists.
+    // Read the current process username into buf. Returns true if one is set.
     inline bool get_session_username(char* buf, int bufSz) {
-        auto doc = config::load("session");
+        if (buf == nullptr || bufSz <= 0) return false;
-        const char* name = doc.get_string("session.username", "");
+        int len = montauk::getuser(buf, (uint64_t)bufSz);
-        bool found = (name[0] != '\0');
+        return len > 0 && buf[0] != '\0';
-        if (found) {
-            montauk::strncpy(buf, name, bufSz);
-        }
-        doc.destroy();
-        return found;
     }
 
-    // Get the current user's home directory. Returns true if a session exists.
+    // Get the current process user's home directory. Returns true if a user is set.
     inline bool get_home_dir(char* buf, int bufSz) {
         char username[32];
         if (!get_session_username(username, sizeof(username))) return false;