Luca Boccassi
a77bd724d3
manager_open_syslog_socket() may be called again with an already open
syslog fd. In that case the old syslog event source still watches the
fd, so adding a new IO source for the same fd fails with -EEXIST and
leaves the old source installed.
Disable and unref the old event source before adding the replacement.
This keeps reopening idempotent and avoids leaving a stale event source
around.
Follow-up for f9a810beda
System and Service Manager
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