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authorZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2016-10-20 23:41:21 -0400
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2016-10-26 20:12:51 -0400
commit299a34c11a4241f8c5832ccd5a7bc13263f8488b (patch)
treef67f997d142debec99297a095f4687f65bf7c00e /test
parent24597ee0e626b61f134e09b4e871449ef86b1343 (diff)
detect-virt: add --private-users switch to check if a userns is active
Various things don't work when we're running in a user namespace, but it's pretty hard to reliably detect if that is true. A function is added which looks at /proc/self/uid_map and returns false if the default "0 0 UINT32_MAX" is found, and true if it finds anything else. This misses the case where an 1:1 mapping with the full range was used, but I don't know how to distinguish this case. 'systemd-detect-virt --private-users' is very similar to 'systemd-detect-virt --chroot', but we check for a user namespace instead.
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