[Rpm-maint] [rpm-software-management/rpm] wrong chroot/fchdir order to break out of chroot? (Issue #1884)

[Vladimir Vukicevic]

>From inspection (based on some issues on non-linux that are too complex to get in here) -- in order to "break out" of chroot, rpm does this:

https://github.com/rpm-software-management/rpm/blob/4afe2d14d33db82ccb41c0a8d5eb1a4db90762fc/lib/rpmchroot.c#L160

Isn't this backwards?  Shouldn't the `fchdir` happen first to set the process working dir to the fd, and then `chroot(".")` would then "break out"?  This all seems to work on linux though, so I'm not sure what's up.

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