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| -rw-r--r-- | man/systemd.unit.xml | 100 |
1 files changed, 78 insertions, 22 deletions
diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml index d38a001366..b222f9f064 100644 --- a/man/systemd.unit.xml +++ b/man/systemd.unit.xml @@ -180,30 +180,86 @@ and no file by that name is found, systemd will look for <filename>getty@.service</filename> and instantiate a service from that configuration file if - it is found. To refer to the instance string from + it is found.</para> + + <para>To refer to the instance string from within the configuration file you may use the special <literal>%i</literal> specifier in many of the - configuration options. Other specifiers that may be - used are <literal>%n</literal>, <literal>%N</literal>, - <literal>%p</literal>, <literal>%P</literal>, - <literal>%I</literal>, <literal>%f</literal>, - <literal>%c</literal>, <literal>%r</literal>, - <literal>%R</literal> and <literal>%t</literal> for - the full unit name, the unescaped unit name, the - prefix name, the unescaped prefix name, the unescaped - instance name, the unescaped filename, the control - group path of the unit, the root control group path of - systemd, and the parent directory of the root control - cgroup path of systemd and the runtime socket dir, - respectively. The unescaped filename is either the - unescaped instance name (if set) with / prepended (if - necessary), or the prefix name similarly prepended - with /. The prefix name here refers to the string - before the @, i.e. "getty" in the example above, where - "tty3" is the instance name. The runtime socket - directory is either <filename>/run</filename> (for the - system manager) or <literal>$XDG_RUNTIME_DIR</literal> - (for user managers).</para> + configuration options. Other specifiers exist, the + full list is:</para> + + <table> + <title>Specifiers available in unit files</title> + <tgroup cols='3' align='left' colsep='1' rowsep='1'> + <colspec colname="spec" /> + <colspec colname="mean" /> + <colspec colname="detail" /> + <thead> + <row> + <entry>Specifier</entry> + <entry>Meaning</entry> + <entry>Details</entry> + </row> + </thead> + <tbody> + <row> + <entry><literal>%n</literal></entry> + <entry>Full unit name</entry> + <entry></entry> + </row> + <row> + <entry><literal>%N</literal></entry> + <entry>Unescaped full unit name</entry> + <entry></entry> + </row> + <row> + <entry><literal>%p</literal></entry> + <entry>Prefix name</entry> + <entry>This refers to the string before the @, i.e. "getty" in the example above, where "tty3" is the instance name.</entry> + </row> + <row> + <entry><literal>%P</literal></entry> + <entry>Unescaped prefix name</entry> + <entry></entry> + </row> + <row> + <entry><literal>%i</literal></entry> + <entry>Instance name</entry> + <entry>This is the string between the @ character and the suffix.</entry> + </row> + <row> + <entry><literal>%I</literal></entry> + <entry>Unescaped instance name</entry> + <entry></entry> + </row> + <row> + <entry><literal>%f</literal></entry> + <entry>Unescaped file name</entry> + <entry>This is either the unescaped instance name (if set) with / prepended (if necessary), or the prefix name similarly prepended with /.</entry> + </row> + <row> + <entry><literal>%c</literal></entry> + <entry>Control group path of the unit</entry> + <entry></entry> + </row> + <row> + <entry><literal>%r</literal></entry> + <entry>Root control group path of systemd</entry> + <entry></entry> + </row> + <row> + <entry><literal>%R</literal></entry> + <entry>Parent directory of the root control group path of systemd</entry> + <entry></entry> + </row> + <row> + <entry><literal>%t</literal></entry> + <entry>Runtime socket dir</entry> + <entry>This is either /run (for the system manager) or $XDG_RUNTIME_DIR (for user managers).</entry> + </row> + </tbody> + </tgroup> + </table> <para>If a unit file is empty (i.e. has the file size 0) or is symlinked to <filename>/dev/null</filename> |