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man: clarify sd_bus_default

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It picks the bus based on the cgroup slice.

(cherry picked from commit f0f7cbd488)
(cherry picked from commit 5a8987794e)
(cherry picked from commit a9e44da6b1)
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Luca Boccassi 2023-04-22 12:47:20 +01:00 committed by Luca Boccassi
parent ce99445126
commit b1f2d0da63
1 changed files with 8 additions and 7 deletions
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15
man/sd_bus_default.xml
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@ -110,13 +110,14 @@
<title>Description</title>
<para><function>sd_bus_default()</function> acquires a bus
connection object to the user bus when invoked in user context, or
to the system bus otherwise. The connection object is associated
with the calling thread. Each time the function is invoked from
the same thread, the same object is returned, but its reference
count is increased by one, as long as at least one reference is
kept. When the last reference to the connection is dropped (using
the
connection object to the user bus when invoked from within a user
slice (any session under <literal>user-*.slice</literal>, e.g.:
<literal>user@1000.service</literal>), or to the system bus
otherwise. The connection object is associated with the calling
thread. Each time the function is invoked from the same thread,
the same object is returned, but its reference count is increased
by one, as long as at least one reference is kept. When the last
reference to the connection is dropped (using the
<citerefentry><refentrytitle>sd_bus_unref</refentrytitle><manvolnum>3</manvolnum></citerefentry>
call), the connection is terminated. Note that the connection is
not automatically terminated when the associated thread ends. It