nicowilliams

I recently happened upon a very interesting implementation of popen() (different API, same idea) called popen-noshell using clone(2), and so I opened an issue requesting use of vfork(2) or posix_spawn() for portability. It turns out that on Linux there's an important advantage to using clone(2). I think I should capture the things I wrote there in a better place. A gist, a blog, whatever.

This is not a paper. I assume reader familiarity with fork() in particular and Unix in general, though, of course, I link to relevant wiki pages, so if the unfamiliar reader is willing to go down the rabbit hole, they should be able to come ou

tsiege

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!






\

errzey

Setting up your KDBG environment for pussies.

Every time I have to setup a new environment, I completely forget the mess you have to go through in order to get your kernel debug world setup properly. So this is here to make sure I won't forget it ever again.

I do not run linux as a desktop, and I suggest that nobody else does. My development consists of OS-X, and VirtualBox with two (almost) identical installations of linux (whatever you want, but I use ubuntu here in my examples). Our secondary VM will be the host which we will be debugging, as in our primary box will attach to it via kgdb.

Step 1

Clone your VM - no need to do a full history copy, just a snapshot clone, call it something that won't confuse you later, like "fucktard69" if your main VM is "shitcocks666". It doesn't matter, shut the fuck up.

tmcw

Extracted from simple-statistics.