fifo.md

fifo named pipe

1st terminal

# bash
mkfifo FIFO

while true; do         # wait for any write to FIFO
  while read line; do
    echo $line
  done < FIFO
  echo EOF             # end of each write
done

# python
import os
os.mkfifo( 'FIFO' )

while True:             # wait for any write to FIFO
  with open( 'FIFO' ) as fifo:
    lines = []          # new list (each write)
    for line in fifo:
      l = line.rstrip() # remove trailing newline
      print( l )
      lines.append( l )
    print( 'EOF' )      # end of each write
    print( lines[ 0 ] )

2nd terminal

echo "\
DATA1
DATA2
DATA3" > FIFO