DB_NOOVERWRITE
if (flags == DB_NOOVERWRITE) {
if (flags == DB_NOOVERWRITE) {
case DB_NOOVERWRITE:
&_key, &_data, flags == DBM_INSERT ? DB_NOOVERWRITE : 0)) == 0)
dbp->put(dbp, NULL, &key, &val, DB_NOOVERWRITE)) == 0)
return_flags |= DB_NOOVERWRITE;
errno = db->put(db, NULL, &key, &data, DB_NOOVERWRITE);