coproc:tldr:938c8
The given command is using a bash feature called "coprocess".
The syntax coproc ${name} { ... } creates a coprocess with the given name. A coprocess is a way to execute a command or a block of code in parallel with the script. In this case, ${name} is the name of the coprocess.
Inside the block { ... }, there is a while loop that reads input line by line. Each line is stored in the variable line.
Within the loop, there is another block of code denoted by ${command1; command2; ---}. This block represents a series of commands that are being executed for each input line. You would replace command1, command2, etc., with the actual commands you want to run.
So, this command sets up a coprocess named ${name} that continuously reads input from a source and executes a series of commands for each line of input.