fputs("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n", out_file);
fputs
("<!DOCTYPE rrd SYSTEM \"http://oss.oetiker.ch/rrdtool/rrdtool.dtd\">\n",
fputs("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n", out_file);
fputs
("<!DOCTYPE rrd SYSTEM \"http://oss.oetiker.ch/rrdtool/rrdtool.dtd\">\n",