#include <u.h>#include <libc.h>#include <bio.h>#include <ndb.h>#include <ip.h> /* *  search the database for matches */ voidusage(void){	fprint(2, "usage: ipquery attr value rattribute\n");	exits("usage");} voidsearch(Ndb *db, char *attr, char *val, char **rattr, int nrattr){	Ndbtuple *t, *tt; 	tt = ndbipinfo(db, attr, val, rattr, nrattr);	for(t = tt; t; t = t->entry)		print("%s=%s ", t->attr, t->val);	print("\n");	ndbfree(tt);} voidmain(int argc, char **argv){	Ndb *db;	char *dbfile = 0; 	ARGBEGIN{	case 'f':		dbfile = ARGF();		break;	}ARGEND; 	if(argc < 3)		usage(); 	db = ndbopen(dbfile);	if(db == 0){		fprint(2, "no db files\n");		exits("no db");	}	search(db, argv[0], argv[1], argv+2, argc-2);	ndbclose(db); 	exits(0);}