HP 3000 Manuals HP 3000 Manuals
Bytestream Files
There is a new record format type supported by the MPE/iX file system on
releases 4.5 and greater. In addition to the old fixed, variable and
undefined length records (undefined record types are not supported on
FTP/iX) a new record type of byte has been added (bytestream).
Bytestream record formats can exist in both the MPE/iX and POSIX
namespace. The purpose of this new record format is to provide an
emulated file format which exists on character-oriented file systems,
where the user application is responsible for defining where logical
records begin and end.
To create such a file, use the build parameters:
ftp> put <source-file> <target-file>;rec=,,b
The (b) references the bytestream record type. Note that no record size
is given. This is because bytestream files always have 1 byte records;
any other value would be overwritten. Similarly bytestream files are
always MPE file type ASCII as opposed to Binary. Regardless of whether
they are MPE file type ASCII or Binary, they may be transferred in either
FTP ASCII or Binary transfer mode.
Build
Creates and immediately allocates a new empty file on disk.
The build command has been enhanced to include this bytestream record
type.
Syntax.
Table A-11.
-------------------------------------------------------------
| |
| BUILD filereference |
| |
-------------------------------------------------------------
| | | |
| | [F] | |
| | | |
-------------------------------------------------------------
| |
| ;REC=[[recsize][,[blkfactor][,[U][,BINARY]]]] |
| |
-------------------------------------------------------------
| | | |
| | [V] | [,ASCII ] |
| | | |
-------------------------------------------------------------
| | | |
| | [B] | |
| | | |
-------------------------------------------------------------
The "[B]" is the bytestream record type specification.
Example:
This sample of a bytestream file, a copy from CATALOG.PUB.SYS which is a
(80) Byte per Record, Fixed ASCII file, to the bytestream record format
which is a (1) Byte per Record Bytestream ASCII file.
Table A-12.
-----------------------------------------------------------------------------------------------
| | |
| | :copy catalog.pub.sys,asciifix :build |
| | bytestrm;rec=,,b;disc=2000000 :fcopy from=asciifix;to=bytestrm |
| | ;nouserlabels HP31900A.05.02 FILE COPIER (c) HEWLETT-PACKARD CO. |
| | 1990 |
| | |
-----------------------------------------------------------------------------------------------
| | |
| | *200*WARNING: FROMFILE RECSIZE IS 80 BYTES, TOFILE RECSIZE IS |
| | 8192 BYTES. CONTINUE OPERATION (Y OR N) ?yes EOF FOUND IN |
| | FROMFILE AFTER RECORD 13819 13820 RECORDS PROCESSED *** 0 ERRORS |
| | |
-----------------------------------------------------------------------------------------------
| | | | | |
| :listf ,2 | SYS | GROUP= WORK --------LOGICAL RECORD | ----- SPACE ----- | |
| ACCOUNT = | CODE | -------- | | |
| FILENAME | | | | |
| | | | | |
-----------------------------------------------------------------------------------------------
| | | | | | | | | | | |
| ASCIIFIX | SIZE | TYP FA | EOF 13820 | LIMIT | R/B 16 | | SECTORS | #X 1 | MX * | |
| BYTESTRM | 80B 1B | BA | 1119420 | 13820 | 1 | | 43044608 | 18 | * | |
| | | | | 2000000 | | | | | | |
| | | | | | | | | | | |
-----------------------------------------------------------------------------------------------
NOTE The BYTESRM file contains 80 (record size) x 13820 (number of
records) plus 13820 (the number of line feed (hexidecimal $0A)
record terminator characters)).