Hello World

Created: November-22, 2018

 placeholderCopy# create the co-process
coproc bash

# send a command to it (echo a)
echo 'echo Hello World' >&"${COPROC[1]}"

# read a line from its output
read line <&"${COPROC[0]}"

# show the line
echo "$line"

輸出是 Hello World。