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There are two ways how a process can attach to a DD system on another
host:
- Using $DD_NAME:
If the environment variable
$DD_NAME, which specifies the name of the DD system to which
one wants to attach, has the form $DD_NAME = dd_name@host_address,
a communication with the dd_server on that host is attempted.
- Using fifo_name:
If a process calls ddu_init with a FIFO name of the form
fifo_name@host_address, a connection over the network is
attempted.
If both possibilities are attempted, it is demanded that the host_address
is the same. Note that user process can also become DD master over the
network by calling dds_create() and the same distinction
between masters and non-masters applies over the network as on local
DD systems.
Online software development
Thu Mar 14 10:35:53 EST 1996