Prologue :
If one ^{. . . . . . . . . . . . . . . #include me}
does not understand a point,
that does not imply
that the point is not correct.

While there is a delight & fun from mini-pieces alike this: zmq_push() { m=$(cat) && echo -e $(printf '\\x01\\x00\\x%02x\\x00%s' $((1 + ${#m})) "$m") | nc -q1 $@; }