Zsh copy & paste system wide for OS X, like in emacs

system-wide-clipboard.zsh

pb-kill-line () {
  zle kill-line
  echo -n $CUTBUFFER | pbcopy
}

pb-kill-whole-line () {
  zle kill-whole-line
  echo -n $CUTBUFFER | pbcopy
}

pb-backward-kill-word () {
  zle backward-kill-word
  echo -n $CUTBUFFER | pbcopy
}

pb-kill-word () {
  zle kill-word
  echo -n $CUTBUFFER | pbcopy
}

pb-kill-buffer () {
  zle kill-buffer
  echo -n $CUTBUFFER | pbcopy
}

pb-copy-region-as-kill-deactivate-mark () {
  zle copy-region-as-kill
  zle set-mark-command -n -1
  echo -n $CUTBUFFER | pbcopy
}

pb-yank () {
  CUTBUFFER=$(pbpaste)
  zle yank
}

zle -N pb-kill-line
zle -N pb-kill-whole-line
zle -N pb-backward-kill-word
zle -N pb-kill-word
zle -N pb-kill-buffer
zle -N pb-copy-region-as-kill-deactivate-mark
zle -N pb-yank

bindkey '^K'   pb-kill-line
bindkey '^U'   pb-kill-whole-line
bindkey '\e^?' pb-backward-kill-word
bindkey '\e^H' pb-backward-kill-word
bindkey '^W'   pb-backward-kill-word
bindkey '\ed'  pb-kill-word
bindkey '\eD'  pb-kill-word
bindkey '^X^K' pb-kill-buffer
bindkey '\ew'  pb-copy-region-as-kill-deactivate-mark
bindkey '\eW'  pb-copy-region-as-kill-deactivate-mark
bindkey '^Y'   pb-yank

I've been using a modified version of this for years and I love! But I now have one minor improvement:

The trouble is that echo interprets backslashes. So if you kill the line \\n\\nhello it'll show up in your pasteboard as \n\nhello.
The simple fix for this is just to use printf '%s' $CUTBUFFER | pbcopy instead of echo.

Made this tiny change in my fork here: https://gist.github.com/varenc/e4a22145c484771f254fa20982e2cd7f