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HP ARPA File Transfer Protocol User's Guide (36957-90159)

ManualsBrandsHP ManualsSoftwareMPE/iX 6.5 Operating System
51525354555657585960
58 Chapter6
MPE/iX File System and Data Transfers
How FTP Transfers Files
How FTP Transfers Files
Files can be transferred with FTP in ASCII mode, binary (IMAGE) mode, and
BYTESTREAM mode.
ASCII Transfers
FTP ASCII file transfers are used primarily for the transfer of ASCII text files. The actual
data transfer occurs in 8-bit NVT-ASCII representation. The receiver converts the data
from the standardized transfer form to the desired target form according to the target
system’s internal representation requirements. The end-of-record (EOR) for ASCII
transfers is represented by a carriage return followed by a line feed.
For the MPE/iX FTP implementation, ASCII data transfers are used when data is
transferred in FTP ASCII mode to or from an MPE/iX file of the ASCII file type.
Binary (IMAGE) Transfers
FTP IMAGE type, commonly called binary transfer type is used for efficient storage and
retrieval of files and for the transfer of binary data. The data is sent in a contiguous
stream of 8-bit transfer bytes. The receiver is required to store the data as contiguous
bytes.
For the MPE/iX FTP implementation, binary data transfers are used when data is
transferred in FTP binary mode to or from a MPE/iX file of the binary file type. There is no
end-of-record designator for binary transfers.
Bytestream (Byte—Local-byte 8) Transfers
FTP bytestream mode sets the file transfer type to a byte size of 8 bits (local-byte 8). This
mode is identical to binary, except that inbound files will be created bytestream instead of
binary if no build-parms are specified. Outbound files are treated as a binary (Image) type
transfer.
NOTE
When running FTP on an HP-UX machine, the command to switch to
local-byte mode is called “tenex.”
MPE/iX Type vs. FTP Transfer Type
Do not confuse MPE/iX file types with FTP file transfer types. Using BUILD command
parameters, the only MPE/iX file type supported is STD
MPE/iX files with an ASCII, BINARY, or BYTESTREAM attribute are specified as part of
the BUILD command REC= parameter.