Arch Linux

Well, I hope this is not a duplicated task, I've read this somewhere, but I cannot find it now.

I've told everything in the subject. I would like to present here a possible solution, I hope this won't be off here:

I would like to ask more: simply remove this "are you root?" thing from pacman:
1. for example dpkg doesn't do this check neither (<- dpkg is not as good as pacman, but that is not bad neither;-), so this probably "works".
2. this leads some annoying bugs (like this)
3. this is a not a security protection at all: if "evil user" wants to install something, he can simply compile and use a no-root-check patched pacman, or do terrible things in /var/lib/pacman by hand, IF your system is weak (i.e. he has the required file/dir _permissions_) -- pacman is just a little "helper utility".
4. our code would be a bit cleaner
[Imho the only "acceptable" reason for doing non-root check: we cannot rollback transactions now (for example, ngaba user can write /opt on my machine), and this helps us avoiding some pacman created spam on HDD, but]
5. all transactions start with db lock, non-root user shouldn't be able to do this
6. well, why don't we let non-root users to "play" with pacman, someone may want to create a database in his home directory, or install packages to his pendrive (not really real life examples, but why not?)