Franck Bui
49f7149947
Upstream commit3180c4dintroduced a version incompatibility between pam_systemd.so v258 and logind v257. This is problematic because such version mismatches can occur in practice: logind still cannot be restarted during a systemd package upgrade (it's a long-standing limitation, see https://github.com/systemd/systemd/issues/17308). When pam_systemd requests a new session, logind v257 returns a FIFO fd. pam_systemd.so v258 ignores this fd and closes it. logind interprets the closure as the session leader exiting and immediately terminates the session. This patch partially reverts commit3180c4dand restores the handling of the FIFO fd in pam_systemd. The change is limited to the D-Bus APIs, since the varlink API was only introduced in logind v258. Follow-up for3180c4d461.
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