strcat(str, "\n"); tell_str(stream, str);
str2 = dupcat(str, "\n", NULL); sfree(str); tell_str(stream, str2); sfree(str2);
static void tell_user(FILE * stream, char *fmt, ...){    char str[0x100];		       /* Make the size big enough */    va_list ap;    va_start(ap, fmt);    vsprintf(str, fmt, ap);    va_end(ap);    strcat(str, "\n");    tell_str(stream, str);}