| SAS Companion for the OS/2 Environment |
A
pipe is a channel of communication between two processes. For example,
with the SAS System and OS/2, you can use a specialized OS/2 application to
provide information to your SAS session or vice versa.
Pipes can be one-way or two-way. With a one-way pipe,
one application writes data to the pipe, and the other application reads from
it. With a two-way pipe, both applications can read and write data. Pipes
can be either unnamed or named:
-
unnamed pipe
- Also called an anonymous pipe (or simply
a pipe), this type of pipe is always one way. It is typically used to communicate
between a parent process and a child process. Within SAS, the SAS System is
the parent process that invokes (and reads data from) a child process.
-
named
pipe
- This type of pipe can handle one-way or
two-way communication between two unrelated processes. That is, one process
is not started by the other. In fact, it is possible to have two applications
communicate over a pipe on a network. You can use named pipes within SAS to
communicate with other applications or even with another SAS session.
Copyright 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
