Hitachi MK-96RD647-01 manual Pipe Function, User-Defined Code Conversion Table, Requirements

Table 2-2 User-Defined Code Conversion Table

Item	Requirement(s)
Size	256 bytes
Format	Binary data
Code length	One byte (two-byte codes cannot be converted)
File name	The following sequences of characters cannot be used in the file
	name:
	EA EcA EkJ No
	If the file name for the code conversion table contains any of these
	sequences, FCU will ignore the file and use the default table instead.

PIPE Function

This function transfers data entries from the mainframe to the application program or the utility program for UNIX systems using a “named pipe”. When this function is used, a mainframe dataset can be transferred to an open system. This is a much faster way to transfer data than the Code Conversion method.

A "named pipe" is a special file that is used to transfer data between unrelated processes. One (or more) processes writes to it, while another process reads from it. Named pipes are visible in the file system and may be viewed with ‘ls’ like any other file. (Named pipes are also called "fifo"s; this term stands for `First In, First Out'.) Named pipes may be used to pass data between unrelated processes, while normal (unnamed) pipes can only connect parent/child processes (with some exceptions). Named pipes are strictly unidirectional, even on systems where anonymous pipes are bidirectional (full- duplex).

Using the PIPE function in UNIX Systems

A "named pipe" is a special file that is used to transfer data between unrelated processes. One (or more) processes write to it, while another process reads from it. Named pipes are visible in the file system and may be viewed with `ls' like any other file. (Named pipes are also called "fifo"s; this term stands for `First In, First Out'.) Named pipes may be used to pass data between unrelated processes, while normal (unnamed) pipes can only connect parent/child processes (unless you try *very* hard). Named pipes are strictly unidirectional, even on systems where anonymous pipes are bidirectional (full- duplex).

About Cross-OS File Exchange Operations 2-11

Hitachi USP V Cross-OS File Exchange User’s Guide