Collaborative Process for Process Communication

1. Collaborative Process

WhenProgramWhen the input of a filter program is generated and the output of the filter program is read, the filter program becomes a coprocess ). Korn shell provides collaborative processes. The Bourne shell, Bourne-again shell, and C shell do not provide a collaborative process method to connect processes.

 

The popen function only provides one-way pipeline linking to the standard input or standard output of another process. For a collaborative process, it has two one-way pipelines linked to the other process: one to the standard input, one device is delivered to the standard output. First, we need to write the data to the standard input, and then read the data from the standard output.