#4 [config_lib.c:230]: (error) Resource leak: data_dat

[dcb]

$ fgrep data_dat ../BUILD/netmonitor-0.4b/src/config_lib.c
FILE *data_dat;
if((data_dat = fopen(data_path, "w+")) == NULL){
fprintf(data_dat, "%s\n", version);
fprintf(data_dat,"[%s]\n0\n0\n0\n0\n", dev[i].dev);
$

Looks like missing call to fclose to me.