tick4.tests

适合新手读的c源代码,包含linux下ls、echo、ping等常用工具的源代码

echo $(echo '(TEST)' BEST)
echo $(echo 'TEST)' BEST)
echo $(echo \(\(TEST\) BEST)
echo $(echo \))
echo $(echo a"`echo "b"`"c )
echo $(echo a"`echo ")"`"c )
echo OK: $?