fix systems permissions after chmod error

[johnny99]

Some how every file on / was chmod 777 (rwxrwxrwx).
Does gentoo store the expected file permissions some place?
Is there a gentoo utility to fix the permissions in the event something like this happens?
...
If you must know, ...
I was plaything with some udev rules and they mounted the drive and recursively chmod everything.
I know. Not to slick.

[yabbadabbadont]

I wonder if "emerge -e world" would correct it?

[Hu]

Yes, reinstalling the packages should fix it. This routinely bites me since one of my packages installs as 4750 instead of the 755 that I prefer. Every time I upgrade, it goes back to being setuid and not executable by some of my users.