[Bug 3349] Test sshd in chroot fails when syscall close_range is undefined and openssh is built with glibc 2.34

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3349

--- Comment #3 from Florian Weimer <fweimer at redhat.com> ---
Does closefrom actually return in your test, or does it crash the
process?

It is impossible to implement closefrom emulation on Linux without
access to /proc: the descriptor range is not constrained by rlimit and
can theoretically extend up to INT_MAX. If you want something that does
not terminate the process, you need to call close_range and perform
your own emulation instead.

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