XFILE Verb

Syntax

XFILE string1{,string2}{,MODE=options}{,ERR=lineref}

Description

The XFILE verb defines any disk file type except a disk directory.

Parameter Description
string1 File identification information, in the format returned by the XFID() Function.
string2 Key definition data for multikeyed MKEYED, XKEYED, or VKEYED files, as derived from the XFIN() Function, XFIN$(86). Information ignored for all files other than MKEYED, XKEYED, and VKEYED files.
MODE=options A string containing comma-separated mode options from the table below.
ERR=lineref Branch to be taken if an error occurs during execution.

MODE Options

Mode

Description
CRYPTPASS=

In PRO/5 5.00 and higher, and BBj 4.00 and higher, creates an encrypted file with the specified password. BASIS recommends a password of at least 20 characters when using AES-128 and at least 40 characters when using AES-256.

Note: Encrypted files tend to perform slower than non-encrypted files due to the overhead of encrypting and decrypting each time the file is accessed.

CRYPTALG=
Value Description
AES-128 Uses AES-128 bit encryption, which is also the default.
AES-256

In BBj 6.00 and higher, and PRO/5 6.00 and higher, uses AES-256 bit encryption.

JDK version 8 and lower

To utilize AES-256 in BBj, install the "Java Cryptography Extension (JCE)". Current JDKs do not need these additional files.

The XFILE verb is used in an erase-redefine procedure, as shown in the examples below. The examples remove all data from the file.

Example 1

1000 OPEN (1)"afile"
1010 LET XFID$=XFID(1)
1020 CLOSE (1)
1030 ERASE "afile"
1040 XFILE XFID$

Example 2 (For MKEYED/XKEYED/VKEYED files only)

1000 OPEN (1)"afile"
1010 LET XFID$=XFID(1),XFIN$=XFIN(1)
1020 CLOSE (1)
1030 ERASE "afile"
1040 XFILE XFID$,XFIN$(86)

See Also

FILE Verb

INITFILE Verb

Modifying Programs to Access the Data Server

Data Server Syntax

Verbs - Alphabetical Listing