1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
|
<?xml version="1.0"?>
<!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
This file is part of systemd.
Copyright 2010 Brandon Philips
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refentry id="tmpfiles.d">
<refentryinfo>
<title>tmpfiles.d</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Documentation</contrib>
<firstname>Brandon</firstname>
<surname>Philips</surname>
<email>brandon@ifup.org</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>tmpfiles.d</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>tmpfiles.d</refname>
<refpurpose>Configuration for creation, deletion and
cleaning of volatile and temporary files</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>/etc/tmpfiles.d/*.conf</filename></para>
<para><filename>/run/tmpfiles.d/*.conf</filename></para>
<para><filename>/usr/lib/tmpfiles.d/*.conf</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><command>systemd-tmpfiles</command> uses the
configuration files from the above directories to describe the
creation, cleaning and removal of volatile and
temporary files and directories which usually reside
in directories such as <filename>/run</filename>
or <filename>/tmp</filename>.</para>
</refsect1>
<refsect1>
<title>Configuration Format</title>
<para>Each configuration file shall be named in the
style of <filename><program>.conf</filename>.
Files in <filename>/etc/</filename> override files
with the same name in <filename>/usr/lib/</filename>
and <filename>/run/</filename>. Files in
<filename>/run/</filename> override files with the same
name in <filename>/usr/lib/</filename>. Packages
should install their configuration files in
<filename>/usr/lib/</filename>. Files in
<filename>/etc/</filename> are reserved for the local
administrator, who may use this logic to override the
configuration files installed by vendor packages. All
configuration files are sorted by their filename in
alphabetical order, regardless in which of the
directories they reside. If multiple files specify the
same path, the entry in the file with the alphabetically
earliest name will be applied, all all other conflicting
entries logged as errors.</para>
<para>If the administrator wants to disable a
configuration file supplied by the vendor the
recommended way is to place a symlink to
<filename>/dev/null</filename> in
<filename>/etc/tmpfiles.d/</filename> bearing the
same filename.</para>
<para>The configuration format is one line per path
containing action, path, mode, ownership, age and argument
fields:</para>
<programlisting>Type Path Mode UID GID Age Argument
d /run/user 0755 root root 10d -
L /tmp/foobar - - - - /dev/null</programlisting>
<refsect2>
<title>Type</title>
<variablelist>
<varlistentry>
<term><varname>f</varname></term>
<listitem><para>Create a file if it does not exist yet (optionally writing a short string into it, if the argument parameter is passed)</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>F</varname></term>
<listitem><para>Create or truncate a file (optionally writing a short string into it, if the argument parameter is passed)</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>w</varname></term>
<listitem><para>Write the argument parameter to a file, if the file exists.
Lines of this type accept shell-style globs in place of normal path
names. The argument parameter will be written without a trailing
newline. C-style backslash escapes are interpreted.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>d</varname></term>
<listitem><para>Create a directory if it does not exist yet</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>D</varname></term>
<listitem><para>Create or empty a directory</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>p</varname></term>
<listitem><para>Create a named pipe (FIFO) if it does not exist yet</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>L</varname></term>
<listitem><para>Create a symlink if it does not exist yet</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>c</varname></term>
<listitem><para>Create a character device node if it does not exist yet</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>b</varname></term>
<listitem><para>Create a block device node if it does not exist yet</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>x</varname></term>
<listitem><para>Ignore a path
during cleaning. Use this type
to exclude paths from clean-up
as controlled with the Age
parameter. Note that lines of
this type do not influence the
effect of r or R lines. Lines
of this type accept
shell-style globs in place of
normal path
names.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>X</varname></term>
<listitem><para>Ignore a path
during cleanup. Use this type
to prevent path removal as
controlled with the Age parameter.
Note that if path is a directory,
content of a directory is not
excluded from clean-up, only
directory itself. Lines of this
type accept shell-style globs
in place of normal path
names.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>r</varname></term>
<listitem><para>Remove a file
or directory if it
exists. This may not be used
to remove non-empty
directories, use R for
that. Lines of this type
accept shell-style globs in
place of normal path
names.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>R</varname></term>
<listitem><para>Recursively
remove a path and all its
subdirectories (if it is a
directory). Lines of this type
accept shell-style globs in
place of normal path
names.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>z</varname></term>
<listitem><para>Restore
SELinux security context label
and set ownership and access
mode of a file or directory if
it exists. Lines of this type
accept shell-style globs in
place of normal path names.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>Z</varname></term>
<listitem><para>Recursively
restore SELinux security
context label and set
ownership and access mode of a
path and all its
subdirectories (if it is a
directory). Lines of this type
accept shell-style globs in
place of normal path
names.</para></listitem>
</varlistentry>
</variablelist>
</refsect2>
<refsect2>
<title>Mode</title>
<para>The file access mode to use when
creating this file or directory. If omitted or
when set to - the default is used: 0755 for
directories, 0644 for all other file
objects. For z, Z lines if omitted or when set
to - the file access mode will not be
modified. This parameter is ignored for x, r,
R, L lines.</para>
</refsect2>
<refsect2>
<title>UID, GID</title>
<para>The user and group to use for this file
or directory. This may either be a numeric
user/group ID or a user or group name. If
omitted or when set to - the default 0 (root)
is used. For z, Z lines when omitted or when set to -
the file ownership will not be modified.
These parameters are ignored for x, r, R, L lines.</para>
</refsect2>
<refsect2>
<title>Age</title>
<para>The date field, when set, is used to
decide what files to delete when cleaning. If
a file or directory is older than the current
time minus the age field it is deleted. The
field format is a series of integers each
followed by one of the following
postfixes for the respective time units:</para>
<variablelist>
<varlistentry>
<term><varname>s</varname></term>
<term><varname>min</varname></term>
<term><varname>h</varname></term>
<term><varname>d</varname></term>
<term><varname>w</varname></term>
<term><varname>ms</varname></term>
<term><varname>m</varname></term>
<term><varname>us</varname></term></varlistentry>
</variablelist>
<para>If multiple integers and units are specified the time
values are summed up. If an integer is given without a unit,
s is assumed.
</para>
<para>When the age is set to zero, the files are cleaned
unconditionally.</para>
<para>The age field only applies to lines starting with
d, D and x. If omitted or set to - no automatic clean-up
is done.</para>
<para>If the age field starts with a tilde
character (~) the clean-up is only applied to
files and directories one level inside the
directory specified, but not the files and
directories immediately inside it.</para>
</refsect2>
<refsect2>
<title>Argument</title>
<para>For L lines determines the destination
path of the symlink. For c, b determines the
major/minor of the device node, with major and
minor formatted as integers, separated by :,
e.g. "1:3". For f, F, w may be used to specify
a short string that is written to the file,
suffixed by a newline. Ignored for all other
lines.</para>
</refsect2>
</refsect1>
<refsect1>
<title>Example</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>
<programlisting>d /var/run/screens 1777 root root 10d
d /var/run/uscreens 0755 root root 10d12h</programlisting>
</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>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-tmpfiles</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-delta</refentrytitle><manvolnum>1</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
|
