running_in_chroot() will fail when a test is executed as a non-root user without CAP_DAC_READ_SEARCH as it won't be able to access /proc/1/root. Let's make things more robust by skipping tests if we can't detect if we're in a chroot or not, since if we can't even detect if we're in a chroot or not, chances are we're missing the required privileges to execute the test anyway.
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