doom is now using the native api, add a PEB + TEB to replace the dummy and the awkward argument passing to processes, all allocations are zeroed because i had enough, small readme changes and dedication.

code/shell_native/shell_native.c

@@ -123,6 +123,27 @@ static void cmd_type(const char* filename) {
     SysCloseHandle(hFile); print("\n");
 }
 
+
+static bool extractProgramPath(const char* cmdline, char* out, size_t outSize) {
+    if (!cmdline || !out || outSize == 0) return false;
+
+    while (*cmdline == ' ' || *cmdline == '\t') cmdline++;
+    if (*cmdline == '\0') return false;
+
+    size_t pos = 0;
+    if (*cmdline == '"') {
+        cmdline++;
+        while (*cmdline && *cmdline != '"' && pos + 1 < outSize)
+            out[pos++] = *cmdline++;
+    } else {
+        while (*cmdline && *cmdline != ' ' && *cmdline != '\t' && pos + 1 < outSize)
+            out[pos++] = *cmdline++;
+    }
+
+    out[pos] = '\0';
+    return pos != 0;
+}
+
 // ---------------------------------------------------------------------------
 // Run one command
 // ---------------------------------------------------------------------------
@@ -134,13 +155,16 @@ static int runCommand(const char* cmd) {
     if (strcmp(cmd, "crash") == 0) { *(int*)0 = 42; return 0; }
     if (strcmp(cmd, "dir") == 0) { cmd_dir("."); return 0; }
     if (strncmp(cmd, "dir ", 4) == 0) { cmd_dir(cmd + 4); return 0; }
-    if (strncmp(cmd, "cd ", 3) == 0) { SysSetCwd(cmd + 3); return 0; }
+    if (strncmp(cmd, "cd ", 3) == 0) { if (SysSetCwd(cmd + 3) != 0) print("cd: failed\n"); return 0; }
     if (strncmp(cmd, "del ", 4) == 0) { SysDeleteFile(cmd + 4); return 0; }
     if (strncmp(cmd, "type ", 5) == 0) { cmd_type(cmd + 5); return 0; }
     if (strncmp(cmd, "write ", 6) == 0) { cmd_write(cmd + 6); return 0; }
 
+    char program[MAX_CMD];
+    if (!extractProgramPath(cmd, program, sizeof(program))) return 0;
+
     uint32_t hProc;
-    if (SysCreateProcess(cmd, &hProc, cmd) == 0) {
+    if (SysCreateProcess(program, &hProc, cmd) == 0) {
         SysWaitForProcess(hProc);
         SysCloseHandle(hProc);
         while (SysKbPoll()) (void)SysKbReadChar();
@@ -148,8 +172,13 @@ static int runCommand(const char* cmd) {
     return 0;
 }
 
-int main(int argc, char** argv) {
+int main(void) {
+    const char* cmdline = SysGetCommandLine();
     char lineBuf[MAX_CMD];
+
+    print("shell: command line: ");
+    print(cmdline);
+    print("\n");
     print("shell: ready\n");
     while (true) {
         print("> ");