{
int l = str-s;
exec_argv[real_argc] = xnew (l+2, char);
strncpy (exec_argv[real_argc], s, l);
exec_argv[real_argc][l] = '\0';
real_argc++;
{
int l = str-s;
exec_argv[real_argc] = xnew (l+2, char);
strncpy (exec_argv[real_argc], s, l);
exec_argv[real_argc][l] = '\0';
real_argc++;