man: try to explain different actions in tmpfiles a bit better

- do not suggest that vendor configuration files should be in
  /etc, use /usr/lib/tmpfiles.d instead
- split the first example, because the text talked about "needing
  two directories", but then a smack attribute was also set, and
  on a different path, which looked like a typo. Replace that
  with the example from original patch [1] which added 't'.
- fix the example for /var/tmp/abrt. The 'x' line was redundant,
  because /var/tmp/abrt/* is already filtered because "d /var/tmp/abrt"
  overrides "d /var/tmp".

[1] http://permalink.gmane.org/gmane.comp.sysutils.systemd.devel/25051
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2016-04-20 00:03:47 -04:00
parent 022ffe4cca
commit 4b743d679b
1 changed files with 46 additions and 15 deletions

View File

@ -157,13 +157,17 @@
<varlistentry>
<term><varname>d</varname></term>
<listitem><para>Create a directory if it does not exist yet.
</para></listitem>
<listitem><para>Create a directory. The mode and ownership will be adjusted if
specified and the directory already exists. Contents of this directory are subject
to time based cleanup if the time argument is specified.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>D</varname></term>
<listitem><para>Create or empty a directory.</para></listitem>
<listitem><para>Similar to <varname>d</varname>, but in addition the contents
of the directory will be removed when <option>--remove</option> is used.
</para></listitem>
</varlistentry>
</varlistentry>
<varlistentry>
@ -612,22 +616,49 @@
</refsect1>
<refsect1>
<title>Example</title>
<title>Examples</title>
<example>
<title>/etc/tmpfiles.d/screen.conf example</title>
<para><command>screen</command> needs two directories created at
boot with specific modes and ownership.</para>
<title>Create directories with specific mode and ownership</title>
<para>
<citerefentry><refentrytitle>screen</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
needs two directories created at boot with specific modes and ownership:</para>
<programlisting>d /run/screens 1777 root root 10d
d /run/uscreens 0755 root root 10d12h
t /run/screen - - - - user.name="John Smith" security.SMACK64=screen</programlisting>
<programlisting># /usr/lib/tmpfiles.d/screen.conf
d /run/screens 1777 root screen 10d
d /run/uscreens 0755 root screen 10d12h
</programlisting>
<para>Contents of <filename>/run/screens</filename> and /run/uscreens will
cleaned up after 10 and 10½ days, respectively.</para>
</example>
<example>
<title>/etc/tmpfiles.d/abrt.conf example</title>
<para><command>abrt</command> needs a directory created at boot with specific mode and ownership and its content should be preserved.</para>
<programlisting>d /var/tmp/abrt 0755 abrt abrt
x /var/tmp/abrt/*</programlisting>
<example>
<title>Create a directory with a SMACK attribute</title>
<programlisting>D /run/cups - - - -
t /run/cups - - - - security.SMACK64=printing user.attr-with-spaces="foo bar"
</programlisting>
<para>The direcory will be owned by root and have default mode. It's contents are
not subject to time based cleanup, but will be obliterated when
<command>systemd-tmpfiles --remove</command> runs.</para>
</example>
<example>
<title>Create a directory and prevent its contents from cleanup</title>
<para>
<citerefentry><refentrytitle>abrt</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
needs a directory created at boot with specific mode and ownership and its content
should be preserved from the automatic cleanup applied to the contents of
<filename>/var/tmp</filename>:</para>
<programlisting># /usr/lib/tmpfiles.d/tmp.conf
d /var/tmp 1777 root root 30d
</programlisting>
<programlisting># /usr/lib/tmpfiles.d/abrt.conf
d /var/tmp/abrt 0755 abrt abrt -
</programlisting>
</example>
</refsect1>