coproc

Bash builtin for creating interactive asynchronous subshells. tldr-pages

On several platforms

Several platforms

Run a subshell asynchronously

coproc { command1; command2; ...; }Identify

Create a coprocess with a specific name

coproc name { command1; command2; ...; }Identify

Write to a specific coprocess stdin

echo "input" >&"${name[1]}"Identify

Read from a specific coprocess stdout

read <&"${name[0]}" variableIdentify

Create a coprocess which repeatedly reads stdin and runs some commands on the input

coproc name { while read line; do command1; command2; ...; done }Identify

Create a coprocess which repeatedly reads stdin, runs a pipeline on the input, and writes the output to stdout

coproc name { while read line; do echo "$line" | command1 | command2 | ... | cat /dev/fd/0; done }Identify

Create and use a coprocess running bc

coproc BC { bc --mathlib; }; echo "1/3" >&"${BC[1]}"; read <&"${BC[0]}" output; echo "$output"Identify