man: improve wording of systemctl's --after/--before
Commit 4a77ca7
was an attempt at fixing the wording of --after and --before,
but the new wording was unclear.
Split the combined --after/--before section into a separate section for
each, explicitly state what each option does, and add information about
how these lists are generated.
Reported-by: Andrey Borzenkov <arvidjaar@gmail.com>
Reported-by: Lennart Poettering <lennart@poettering.net>
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@ -157,12 +157,27 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>.
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<varlistentry>
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<term><option>--after</option></term>
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<listitem>
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<para>With <command>list-dependencies</command>, show the
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units that are ordered before the specified unit. In other
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words, list the units that are in the <varname>After=</varname>
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directive of the specified unit, have the specified unit in
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their <varname>Before=</varname> directive, or are otherwise
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implicit dependencies of the specified unit.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--before</option></term>
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<listitem>
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<para>Show after (before) which units the specified unit is started
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with <command>list-dependencies</command>.
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</para>
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<para>With <command>list-dependencies</command>, show the
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units that are ordered after the specified unit. In other
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words, list the units that are in the <varname>Before=</varname>
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directive of the specified unit, have the specified unit in
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their <varname>After=</varname> directive, or otherwise depend
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on the specified unit.</para>
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</listitem>
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</varlistentry>
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