Copy file or pipe to Xorg clipboard

cb-in

#!/bin/bash
# Copy file or pipe to Xorg clipboard

# Required program(s)
req_progs=(xclip)
for p in ${req_progs[@]}; do
  hash "$p" 2>&- || \
  { echo >&2 " Required program \"$p\" not installed."; exit 1; }
done

# Check user is not root (root doesn't have access to user Xorg server)
if [[ "$USER" == root ]]; then
  echo " Must be regular user to copy a file to the clipboard"
  exit
fi

# Copy stdin to clipboard
if ! [ -t 0 ]; then
  echo -n "$(< /dev/stdin)" | xclip -selection clipboard && \
  echo " Copied stdout to clipboard"
# Copy file to clipboard
else
  # Display usage if no parameters given
  if [[ -z "$@" ]]; then
    echo " ${0##*/} <filename> - copy a file to the clipboard
 command | ${0##*/}  - copy stdout to the clipboard" && exit
  fi
  # Copy file to clipboard
  if [[ ! -f "$@" ]]; then
    echo "$warn File ${txtund}$filename${txtrst} doesn't exist" && exit
  else
    xclip -in -selection clipboard "$@" && \
    echo " Copied file "$@" to the clipboard"
  fi
fi