tee-appends-input

busybox最新版的源码:学习和应用的好东东,多的不说了,大家看后再说吧

echo i\'m a little teapot >foo
cp foo bar
echo i\'m a little teapot >>foo
echo i\'m a little teapot | busybox tee -a bar >/dev/null
cmp foo bar