osc52 is a utility for copying to system clipboard via osc52 escape sequences.

osc52.sh

#!/bin/bash
#
# osc52 is a utility for copying to system clipboard via osc52 escape sequences.
#
# If your terminal supports these sequences this enables you 
# to copy things from remote SSH sessions to system clipboard.
#
# Convenient when you're using lots of in-browser terminals or working on a remote server.
#
# Usage: 
#   osc52 [FILE]
#   echo "data" | osc52
#
# credits: https://gist.github.com/KirinDave/cc087efb43c364aadbc57bb497d7e4c3
# credits: https://github.com/prashantv/dotfiles/blob/d29e6d8d0693cb9b8a297ec761df59a62b506703/bin/clip

set -eu

# MAXLEN=74994
MAXLEN=$(( 73 * 1024 ))
TARGET=${1:-}
DATA=""

if [[ $TARGET == "-" || $TARGET == "" ]]; then
  DATA=$( cat )
  LEN=$( echo "$DATA" | wc -c )
  TARGET='STDIN'
else
  if [[ ! -r $TARGET ]]; then
	  echo "Can not read file: $1"
	  exit 1
  fi

  DATA=$( cat "$TARGET" )
  LEN=$( cat "$TARGET" | wc -c )
fi

echo "Copying $TARGET to clipboard" >&2
if [[ "$LEN" -gt "$MAXLEN" ]]; then
    printf "Input is %d bytes too long" "$(( LEN - MAXLEN ))" >&2
fi

OSC_DATA=$(printf %s "$DATA" | head -c $MAXLEN | base64 | tr -d '\n\r')

# If fd 1 is a terminal, print directly
if [[ -t 1 ]]; then
  printf "\033]52;c;%s\a" "$OSC_DATA"
  exit 0
fi

# Otherwise, print to /dev/tty
printf "\033]52;c;%s\a" "$OSC_DATA" > /dev/tty