これでコピーして、screenの他のウィンドウでペーストしたりして使う。
function pwd-clip() {
local copyToClipboard
if which pbcopy >/dev/null 2>&1 ; then
# Mac
copyToClipboard='pbcopy'
elif which xsel >/dev/null 2>&1 ; then
# Linux
copyToClipboard='xsel --input --clipboard'
elif which putclip >/dev/null 2>&1 ; then
# Cygwin
copyToClipboard='putclip'
else
copyToClipboard='cat'
fi
# ${=VAR} enables SH_WORD_SPLIT option
# so ${=VAR] is splited in words, for example "a" "b" "c"
echo -n $PWD | ${=copyToClipboard}
}