You can always use the Windows API directly. Try this:
Code
#include<default.c>
#include<windows.h>

LPSTR GetCommandLineA();
API(GetCommandLineA,Kernel32)

// returns a temporary string with -u output, if it's in double quotations.
string get_u_output(){
	int len = strlen(GetCommandLineA());
	string str = zalloc(len);
	strcpy(str,report(3));
	char* p = strstr(str,"-u \"");
	if(!p) return NULL;
	if(!strtok(p,"\"")) return NULL;
	return strtok(0,"\"");
}

void main(){
	printf("\n\"%s\"",GetCommandLineA());
	printf("\n\"%s\"",get_u_output());
	
	printf("\nDone.");
}