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

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 = doc.get_string("session.username", "user");
+    const char* 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");
-        const char* name = doc.get_string("session.username", "");
-        if (name[0]) {
-            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';
+        char username[32] = {};
+        if (montauk::getuser(username, sizeof(username)) > 0 && username[0]) {
+            snprintf(g.dir_path, sizeof(g.dir_path), "0:/users/%s", username);
         } 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>
@@ -114,17 +113,10 @@ extern "C" void _start() {
 
     // Build output path: 0:/users/<username>/Pictures/screenshot_YYYYMMDD_HHMMSS.jpg
     char username[32] = {};
-    {
-        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();
+    if (montauk::getuser(username, sizeof(username)) <= 0 || username[0] == '\0') {
+        montauk::mfree(jpeg.data);
+        montauk::print("screenshot: no user session\n");
+        montauk::exit(1);
     }
 
     char home[128];

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");
-    const char* name = doc.get_string("session.username", "");
-    if (name[0]) {
-        snprintf(g.dir_path, sizeof(g.dir_path), "0:/users/%s/Videos", name);
+    char username[32] = {};
+    if (montauk::getuser(username, sizeof(username)) > 0 && username[0]) {
+        snprintf(g.dir_path, sizeof(g.dir_path), "0:/users/%s/Videos", username);
         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) {