copy - copiar para a área de transferência

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#!/bin/sh
#
# if no args are given it reads stdin for input
# redirection can be used to read from another process or via pipe
# there is no need to quote as it takes all args
#
# examples:
# copy string
# copy <Return>, this is a string <^d>
# copy < string
# copy < filepath
#
# depends: xsel

if test -n "$1"; then
  printf "%s" "$*" | xsel -bi
  exit $?
fi

printf "%s" "$(cat)" | xsel -bi