DBA_LOCK_TRUNC    770 ext/dba/dba.c  			lock_mode = (lock_flag & DBA_LOCK_TRUNC) ? LOCK_EX : 0;
DBA_LOCK_TRUNC     62 ext/dba/php_dba.h #define DBA_LOCK_ALL     (DBA_LOCK_READER|DBA_LOCK_WRITER|DBA_LOCK_CREAT|DBA_LOCK_TRUNC)
DBA_LOCK_TRUNC     63 ext/dba/php_dba.h #define DBA_LOCK_WCT     (DBA_LOCK_WRITER|DBA_LOCK_CREAT|DBA_LOCK_TRUNC)