efopen
struct __sFILE *efopen(const char *, const char *);
ATF_TP_ADD_TC(tp, efopen);
ATF_TC(efopen);
ATF_TC_HEAD(efopen, tc)
ATF_TC_BODY(efopen, tc)
f = efopen("XXX", "XXX");
FILE *efopen(const char *, const char *);
fp = efopen(fname, "r");
fp = efopen(vp->dbfile, vp->append_output ? "a" : "w+");