FILE *ifp;
char hname[MAXHOSTNAMELEN + 2];
while ((ch = getopt(argc, argv, "uhcbsdf:i:o:m:")) != -1) {
while ((ch = getopt(argc, argv, "uhcbsfd:i:o:m:")) != -1) {
switch(ch) {
case 'f':
filter_plusminus++;