Jerod Santo - Latest Comments in cd up, up, and a-up

Re: cd up, up, and a-up

Jerod Santo — Tue, 08 Sep 2009 17:03:44 -0000

So you're accessing a subset of $1. That makes sense.

Your function works great in every situation except when you don't pass any args to cd at all. In this case, it fails. I added a check for that case and updated the function in the post. Let me know if it can be further improved.

Thanks!

Re: cd up, up, and a-up

someguy — Tue, 08 Sep 2009 14:10:39 -0000

${foo:x:y} == foo[x:y] in Python.

Re: cd up, up, and a-up

Jerod Santo — Tue, 08 Sep 2009 11:52:55 -0000

You're absolutely right, my function doesn't handle spaces in pathnames at all. I'll give yours a try and if it works as advertised I'll be using it instead, thanks!

I'm not familiar with:

${1:0:2}

What does that mean?

Re: cd up, up, and a-up

someguy — Tue, 08 Sep 2009 11:02:56 -0000

This seems unnecessarily complicated. It's also not safe for pathnames with spaces or other shellcandy. Try:

function cd () {
if [ ${1:0:2} == '..' ]; then
rest=${1:2}
rest=${rest//./../}
builtin cd "${1:0:2}/${rest}"
else
builtin cd "$1";
fi
}