X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=man%2Fsystemd.unit.xml;h=5c8b8e88689469d741c38b01f059017a3466d927;hb=edcfd89ad0996686488c02ee0062d913fa0ba483;hp=552c747695f46aaf2195ff41e37c025d63674e27;hpb=e9dd9f9547350c7dc0473583b5c2228dc8f0ab76;p=elogind.git
diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml
index 552c74769..5c8b8e886 100644
--- a/man/systemd.unit.xml
+++ b/man/systemd.unit.xml
@@ -60,7 +60,9 @@
target.target,
path.path,
timer.timer,
- snapshot.snapshot
+ snapshot.snapshot,
+ slice.slice,
+ scope.scope/etc/systemd/system/*/run/systemd/system/*
@@ -68,7 +70,8 @@
...
- /etc/systemd/user/*
+ $HOME/.config/systemd/user/*
+/etc/systemd/user/*/run/systemd/user/*/usr/lib/systemd/user/*...
@@ -81,12 +84,15 @@
A unit configuration file encodes information
about a service, a socket, a device, a mount point, an
automount point, a swap file or partition, a start-up
- target, a file system path, or a timer controlled and
- supervised by
- systemd1. The
- syntax is inspired by systemd1,
+ a temporary system state snapshot, a resource
+ management slice or a group of externally created
+ processes. The syntax is inspired by XDG
- Desktop Entry Specification.desktop files, which are in turn
+ Desktop Entry Specification
+ .desktop files, which are in turn
inspired by Microsoft Windows
.ini files.
@@ -110,6 +116,8 @@
systemd.path5,
systemd.timer5,
systemd.snapshot5.
+ systemd.slice5.
+ systemd.scope5.
Unit files are loaded from a set of paths
@@ -118,9 +126,9 @@
Unit files may contain additional options on top
of those listed here. If systemd encounters an unknown
- option it will write a warning log message but
+ option, it will write a warning log message but
continue loading the unit. If an option is prefixed
- with it is ignored completely by
+ with , it is ignored completely by
systemd. Applications may use this to include
additional information in the unit files.
@@ -128,7 +136,7 @@
written in various formats. For positive settings the
strings , ,
and are
- equivalent. For negative settings the strings
+ equivalent. For negative settings, the strings
, ,
and are
equivalent.
@@ -152,14 +160,14 @@
space character. This may be used to wrap long lines.Along with a unit file
- foo.service the directory
+ foo.service, the directory
foo.service.wants/ may exist. All
unit files symlinked from such a directory are
implicitly added as dependencies of type
Wanted= to the unit. This is useful
to hook units into the start-up of other units,
without having to modify their unit files. For details
- about the semantics of Wanted= see
+ about the semantics of Wanted=, see
below. The preferred way to create symlinks in the
.wants/ directory of a unit file
is with the enable command of the
@@ -171,9 +179,9 @@
.requires/ in this case.Along with a unit file
- foo.service a directory
+ foo.service, a directory
foo.service.d/ may exist. All
- files with the suffix .conf from
+ files with the suffix .conf from
this directory will be parsed after the file itself is
parsed. This is useful to alter or add configuration
settings to a unit, without having to modify their
@@ -198,7 +206,7 @@
file system namespace. Example: a device unit
dev-sda.device refers to a device
with the device node /dev/sda in
- the file system namespace. If this applies a special
+ the file system namespace. If this applies, a special
way to escape the path name is used, so that the
result is usable as part of a filename. Basically,
given a path, "/" is replaced by "-", and all
@@ -211,12 +219,12 @@
Optionally, units may be instantiated from a
template file at runtime. This allows creation of
multiple units from a single configuration file. If
- systemd looks for a unit configuration file it will
+ systemd looks for a unit configuration file, it will
first search for the literal unit name in the
filesystem. If that yields no success and the unit
- name contains an @ character, systemd will look for a
+ name contains an @ character, systemd will look for a
unit template that shares the same name but with the
- instance string (i.e. the part between the @ character
+ instance string (i.e. the part between the @ character
and the suffix) removed. Example: if a service
getty@tty3.service is requested
and no file by that name is found, systemd will look
@@ -230,7 +238,7 @@
configuration options. See below for details.If a unit file is empty (i.e. has the file size
- 0) or is symlinked to /dev/null
+ 0) or is symlinked to /dev/null,
its configuration will not be loaded and it appears
with a load state of masked, and
cannot be activated. Use this as an effective way to
@@ -249,10 +257,9 @@
Unit files are loaded from a set of paths
determined during compilation, described in the two
- tables below. Unit files found in directories higher
- in the hierarchy override files with the same name
- lower in the hierarchy, thus allowing overrides.
-
+ tables below. Unit files found in directories listed
+ earlier override files with the same name in
+ directories lower in the list.When systemd is running in user mode
() and the variable
@@ -276,33 +283,17 @@
-
- /run/systemd/generator.early
- Generated units (early)
- /etc/systemd/systemLocal configuration
- /run/systemd/systemd
- Volatile units
-
-
- /run/systemd/generator
- Generated units (middle)
-
-
- /usr/local/lib/systemd/system
- Units for local packages
+ /run/systemd/system
+ Runtime units/usr/lib/systemd/system
- Units for installed packages
-
-
- /run/systemd/generator.late
- Generated units (late)
+ Units of installed packages
@@ -310,7 +301,7 @@
- Load path when running in session mode ().
+ Load path when running in user mode ().
@@ -324,8 +315,8 @@
- /tmp/systemd-generator.early.XXXXXX
- Generated units (early)
+ $HOME/.config/systemd/user
+ User configuration/etc/systemd/user
@@ -333,23 +324,11 @@
/run/systemd/user
- Volatile units
-
-
- /tmp/systemd-generator.XXXXXX
- Generated units (middle)
-
-
- /usr/local/lib/systemd/user
- Units for local packages
+ Runtime units/usr/lib/systemd/user
- Units for installed packages
-
-
- /tmp/systemd-generator.late.XXXXXX
- Generated units (late)
+ Units of installed packages
@@ -358,7 +337,10 @@
Additional units might be loaded into systemd
("linked") from directories not on the unit load
path. See the link command for
- systemctl1.
+ systemctl1. Also,
+ some units are dynamically created via generators
+ Generators.
@@ -377,7 +359,15 @@
describing the unit. This is intended
for use in UIs to show descriptive
information along with the unit
- name.
+ name. The description should contain a name
+ that means something to the end user.
+ Apache2 Web Server is a good
+ example. Bad examples are
+ high-performance light-weight HTTP
+ server (too generic) or
+ Apache2 (too specific and
+ meaningless for people who do not know
+ Apache).
@@ -471,7 +461,7 @@
the start-up was pulled in indirectly
by some dependency or automatic
start-up of units that is not
- requested by the user this dependency
+ requested by the user, this dependency
must be fulfilled and otherwise the
transaction fails. Hence, this option
may be used to configure dependencies
@@ -634,7 +624,7 @@
type After= or
Before=. If two
units have no ordering dependencies
- between them they are shut down
+ between them, they are shut down
or started up simultaneously, and
no ordering takes
place.
@@ -682,12 +672,12 @@
OnFailureIsolate=Takes a boolean
- argument. If the
+ argument. If , the
unit listed in
OnFailure= will be
enqueued in isolation mode, i.e. all
units that are not its dependency will
- be stopped. If this is set only a
+ be stopped. If this is set, only a
single unit may be listed in
OnFailure=. Defaults
to
@@ -698,7 +688,7 @@
IgnoreOnIsolate=Takes a boolean
- argument. If
+ argument. If ,
this unit will not be stopped when
isolating another unit. Defaults to
.
@@ -708,7 +698,7 @@
IgnoreOnSnapshot=Takes a boolean
- argument. If
+ argument. If ,
this unit will not be included in
snapshots. Defaults to
for device and
@@ -720,7 +710,7 @@
StopWhenUnneeded=Takes a boolean
- argument. If
+ argument. If ,
this unit will be stopped when it is
no longer used. Note that in order to
minimize the work to be executed,
@@ -739,10 +729,10 @@
RefuseManualStop=Takes a boolean
- argument. If
+ argument. If ,
this unit can only be activated
or deactivated indirectly. In
- this case explicit start-up
+ this case, explicit start-up
or termination requested by the
user is denied, however if it is
started or stopped as a
@@ -762,10 +752,10 @@
AllowIsolate=Takes a boolean
- argument. If
+ argument. If ,
this unit may be used with the
systemctl isolate
- command. Otherwise this will be
+ command. Otherwise, this will be
refused. It probably is a good idea to
leave this disabled except for target
units that shall be used similar to
@@ -779,7 +769,7 @@
DefaultDependencies=Takes a boolean
- argument. If
+ argument. If ,
(the default), a few default
dependencies will implicitly be
created for the unit. The actual
@@ -797,7 +787,7 @@
highly recommended to leave this
option enabled for the majority of
common units. If set to
- this option
+ , this option
does not disable all implicit
dependencies, just non-essential
ones.
@@ -809,7 +799,7 @@
When clients are
waiting for a job of this unit to
complete, time out after the specified
- time. If this time limit is reached
+ time. If this time limit is reached,
the job will be cancelled, the unit
however will not change state or even
enter the failed
@@ -851,7 +841,7 @@
Before starting a unit
verify that the specified condition is
- true. If it is not true the starting
+ true. If it is not true, the starting
of the unit will be skipped, however
all ordering dependencies of it are
still respected. A failing condition
@@ -866,7 +856,7 @@
a file existence condition is
checked before a unit is started. If
the specified absolute path name does
- not exist the condition will
+ not exist, the condition will
fail. If the absolute path name passed
to
ConditionPathExists=
@@ -969,13 +959,14 @@
xen,
bochs,
chroot,
+ uml,
openvz,
lxc,
lxc-libvirt,
systemd-nspawn to
test against a specific
implementation. If multiple
- virtualization technologies are nested
+ virtualization technologies are nested,
only the innermost is considered. The
test may be negated by prepending an
exclamation mark.
@@ -1025,12 +1016,12 @@
battery powered at the time of
activation of the unit. This takes a
boolean argument. If set to
- true the condition
+ true, the condition
will hold only if at least one AC
connector of the system is connected
to a power source, or if no AC
connectors are known. Conversely, if
- set to false the
+ set to false, the
condition will hold only if there is
at least one AC connector known and
all AC connectors are disconnected
@@ -1041,30 +1032,30 @@
be used to add a constant condition
check value to the unit. It takes a
boolean argument. If set to
- false the condition
+ false, the condition
will always fail, otherwise
succeed.If multiple conditions are
- specified the unit will be executed if
+ specified, the unit will be executed if
all of them apply (i.e. a logical AND
is applied). Condition checks can be
prefixed with a pipe symbol (|) in
which case a condition becomes a
triggering condition. If at least one
triggering condition is defined for a
- unit then the unit will be executed if
+ unit, then the unit will be executed if
at least one of the triggering
conditions apply and all of the
non-triggering conditions. If you
prefix an argument with the pipe
- symbol and an exclamation mark the
+ symbol and an exclamation mark, the
pipe symbol must be passed first, the
exclamation second. Except for
ConditionPathIsSymbolicLink=,
all path checks follow symlinks. If
any of these options is assigned the
- empty string the list of conditions is
+ empty string, the list of conditions is
reset completely, all previous
condition settings (of any kind) will
have no effect.
@@ -1115,19 +1106,46 @@
WantedBy=RequiredBy=
- Installs a symlink in
- the .wants/
- or .requires/
- subdirectory for a unit, respectively. This has the
- effect that when the listed unit name
- is activated the unit listing it is
- activated
- too. WantedBy=foo.service
+ A symbolic link is
+ created in the
+ .wants/ or
+ .requires/ directory
+ of the listed unit when this unit is
+ activated by systemctl
+ enable. This has the effect
+ that a dependency of type
+ Wants= or
+ Requires= is added
+ from the listed unit to the current
+ unit. The primary result is that the
+ current unit will be started when the
+ listed unit is started. See the
+ description of
+ Wants= and
+ Requires= in the
+ [Unit] section for details.
+
+ WantedBy=foo.service
in a service
bar.service is
mostly equivalent to
Alias=foo.service.wants/bar.service
- in the same file.
+ in the same file. In case of template
+ units, systemctl enable
+ must be called with an instance name, and
+ this instance will be added to the
+ .wants/ or
+ .requires/ list
+ of the listed unit.
+ E.g. WantedBy=getty.target
+ in a service
+ getty@.service
+ will result in systemctl
+ enable getty@tty2.service
+ creating a
+ getty.target.wants/getty@tty2.service
+ link to getty@.service.
+
@@ -1147,7 +1165,7 @@
The following specifiers are interpreted in the
- Install section: %n, %N, %p, %i, %U, %u, %m, %H, %b.
+ Install section: %n, %N, %p, %i, %U, %u, %m, %H, %b, %v.
For their meaning see the next section.
@@ -1198,7 +1216,7 @@
%iInstance name
- For instantiated units: this is the string between the @ character and the suffix.
+ For instantiated units: this is the string between the @ character and the suffix.%I
@@ -1223,7 +1241,10 @@
%RParent directory of the control group path where units are placed.
- For system instances this usually resolves to /, except in containers, where this resolves to the container's root directory. This specifier is particularly useful in the ControlGroup= setting (see systemd.exec5).
+ For system instances this usually
+ resolves to /, except in
+ containers, where this resolves to the
+ container's root directory.%t
@@ -1265,6 +1286,11 @@
Host nameThe hostname of the running system.
+
+ %v
+ Kernel release
+ Identical to uname -r output.
+ %%Escaped %
@@ -1291,9 +1317,12 @@
systemd.path5,
systemd.timer5,
systemd.snapshot5,
+ systemd.scope5,
+ systemd.slice5,
systemd.time7,
capabilities7,
- systemd.directives7
+ systemd.directives7,
+ uname1