Coprocess
In computer science, a coprocess is a process that explicitly yields control to other processes or the operating system.
In Unix, a coprocess is a process that sends its output solely to the exact single process from which it solely received input.
Bash, BETA, ksh, and Zsh[1] have language constructs for coprocesses.
See also
[edit]
References
[edit]- ^ "6.1 Simple Commands & Pipelines". The Z Shell Manual (Version 5.9 ed.). 14 May 2022. Retrieved 13 July 2025.
If a pipeline is preceded by 'coproc', it is executed as a coprocess; a two-way pipe is established between it and the parent shell. The shell can read from or write to the coprocess by means of the '>&p' and '<&p' redirection operators or with 'print -p' and 'read -p'. A pipeline cannot be preceded by both 'coproc' and '!'. If job control is active, the coprocess can be treated in other than input and output as an ordinary background job.
External links
[edit]- Coprocesses definition in Bash Reference Manual
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