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authorZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2015-11-28 18:41:08 -0500
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2015-11-28 18:48:03 -0500
commit6debb3982612b1fce9b2dd878bad07fe5ae9c0a9 (patch)
tree5f963a1934f94f28291d9223f402425141649860 /tmpfiles.d/systemd.conf.m4
parent5bb5b236fe8c663b7d4db5ccaf3e3e7942bf6abd (diff)
acl-util: only set the mask if not present
When we have non-owner user or group entries, we need the mask for the acl to be valid. But acl_calc_mask() calculates the mask to include all permissions, even those that were masked before. Apparently this happens when we inherit *:r-x permissions from a parent directory — the kernel sets *:r-x, mask:r--, effectively masking the executable bit. acl_calc_mask() would set the mask:r-x, effectively enabling the bit. To avoid this, be more conservative when to add the mask entry: first iterate over all entries, and do nothing if a mask. This returns the code closer to J.A.Steffens' original version in v204-90-g23ad4dd884. Should fix https://github.com/systemd/systemd/issues/1977.
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