If you want to write shell scripts that are portable to places without GNU or other reasonably featured tools, you'll have to be careful. http://www.gnu.org/so

If you want to write shell scripts that are portable to places without GNU or other reasonably featured tools, you'll have to be careful. http://www.gnu.org/software/autoconf//manual/autoconf-2.69/html_node/Portable-Shell.html http://www.gnu.org/software/autoconf//manual/autoconf-2.69/h...