X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=man%2Fsystemd.exec.xml;h=c9958340afd06e242f67d14d0f1a488b248de4fe;hp=8a22ac013857da530f7ef35cb16c6de1ecfe3831;hb=6a75304e41e4487d840057a0e5f9972e141e4540;hpb=565d91fdf198b88f7c2d72c67cfc6c30341a3596
diff --git a/man/systemd.exec.xml b/man/systemd.exec.xml
index 8a22ac013..c9958340a 100644
--- a/man/systemd.exec.xml
+++ b/man/systemd.exec.xml
@@ -48,10 +48,10 @@
- systemd.service,
- systemd.socket,
- systemd.mount,
- systemd.swap
+ service.service,
+ socket.socket,
+ mount.mount,
+ swap.swap
@@ -69,7 +69,7 @@
files, and
systemd.service5,
systemd.socket5,
- systemd.swap5
+ systemd.swap5,
and
systemd.mount5
for more information on the specific unit
@@ -82,7 +82,7 @@
Options
-
+ WorkingDirectory=
@@ -129,7 +129,7 @@
Sets the supplementary
Unix groups the processes are executed
- as. This takes a space separated list
+ as. This takes a space-separated list
of group names or IDs. This option may
be specified more than once in which
case all listed groups are set as
@@ -286,9 +286,25 @@
empty string is assigned to this
option the list of environment
variables is reset, all prior
- assignments have no effect. See
+ assignments have no effect.
+ Variable expansion is not performed
+ inside the strings, however, specifier
+ expansion is possible. $ character has
+ no special meaning.
+ If you need to assign a value containing spaces
+ to a variable, use double quotes (")
+ for the assignment.
+
+ Example:
+ Environment="VAR1=word1 word2" VAR2=word3 "VAR3=word 5 6"
+ gives three variables VAR1,
+ VAR2, VAR3.
+
+
+
+ See
environ7
- for details.
+ for details about environment variables.
EnvironmentFile=
@@ -296,7 +312,7 @@
Environment= but
reads the environment variables from a
text file. The text file should
- contain new-line separated variable
+ contain new-line-separated variable
assignments. Empty lines and lines
starting with ; or # will be ignored,
which may be used for commenting. A line
@@ -308,17 +324,18 @@
double quotes (").
The argument passed should be an
- absolute file name or wildcard
+ absolute filename or wildcard
expression, optionally prefixed with
- "-", which indicates that if the file
- does not exist it won't be read and no
- error or warning message is logged.
- This option may be specified more than
- once in which case all specified files
- are read. If the empty string is
- assigned to this option the list of
- file to read is reset, all prior
- assignments have no effect.
+ -, which indicates
+ that if the file does not exist it
+ won't be read and no error or warning
+ message is logged. This option may be
+ specified more than once in which case
+ all specified files are read. If the
+ empty string is assigned to this
+ option the list of file to read is
+ reset, all prior assignments have no
+ effect.
The files listed with this
directive will be read shortly before
@@ -447,7 +464,7 @@
with
in
- systemd.conf5,
+ systemd-system.conf5,
which defaults to
.
@@ -466,7 +483,7 @@
setting defaults to the value set with
in
- systemd.conf5,
+ systemd-system.conf5,
which defaults to
.
@@ -701,32 +718,40 @@
capability bounding set for the
executed process. See
capabilities7
- for details. Takes a whitespace
- separated list of capability names as
- read by
- cap_from_name3.
+ for details. Takes a whitespace-separated
+ list of capability names as read by
+ cap_from_name3,
+ e.g. CAP_SYS_ADMIN,
+ CAP_DAC_OVERRIDE,
+ CAP_SYS_PTRACE.
Capabilities listed will be included
in the bounding set, all others are
removed. If the list of capabilities
- is prefixed with ~ all but the listed
- capabilities will be included, the
- effect of the assignment
- inverted. Note that this option also
- effects the respective capabilities in
- the effective, permitted and
- inheritable capability sets, on top of
- what Capabilities=
+ is prefixed with ~
+ all but the listed capabilities will
+ be included, the effect of the
+ assignment inverted. Note that this
+ option also affects the respective
+ capabilities in the effective,
+ permitted and inheritable capability
+ sets, on top of what
+ Capabilities=
does. If this option is not used the
capability bounding set is not
modified on process execution, hence
no limits on the capabilities of the
process are enforced. This option may
appear more than once in which case
- the bounding sets are merged. If the empty
- string is assigned to this option the
- bounding set is reset, and all prior
- settings have no
- effect.
+ the bounding sets are merged. If the
+ empty string is assigned to this
+ option the bounding set is reset to
+ the empty capability set, and all
+ prior settings have no effect. If set
+ to ~ (without any
+ further argument) the bounding set is
+ reset to the full set of available
+ capabilities, also undoing any
+ previous settings.
@@ -775,10 +800,10 @@
space-separated list of cgroup
identifiers. A cgroup identifier is
formatted like
- cpu:/foo/bar,
+ cpu:/foo/bar,
where "cpu" indicates the kernel
control group controller used, and
- /foo/bar is the
+ /foo/bar is the
control group path. The controller
name and ":" may be omitted in which
case the named systemd control group
@@ -801,8 +826,11 @@
in specific paths in specific kernel
controller hierarchies. It is not
recommended to manipulate the service
- control group path in the systemd
- named hierarchy. For details about
+ control group path in the private
+ systemd named hierarchy
+ (i.e. name=systemd),
+ and doing this might result in
+ undefined behaviour. For details about
control groups see cgroups.txt.
@@ -824,7 +852,7 @@
settings of
DefaultControllers=
of
- systemd.conf5,
+ systemd-system.conf5,
but a unit's
ControlGroup=
setting for a specific controller
@@ -917,134 +945,16 @@
-
- CPUShares=
-
- Assign the specified
- overall CPU time shares to the
- processes executed. Takes an integer
- value. This controls the
- cpu.shares control
- group attribute, which defaults to
- 1024. For details about this control
- group attribute see sched-design-CFS.txt.
-
-
-
- MemoryLimit=
- MemorySoftLimit=
-
- Limit the overall memory usage
- of the executed processes to a certain
- size. Takes a memory size in bytes. If
- the value is suffixed with K, M, G or
- T the specified memory size is parsed
- as Kilobytes, Megabytes, Gigabytes,
- or Terabytes (to the base
- 1024), respectively. This controls the
- memory.limit_in_bytes
- and
- memory.soft_limit_in_bytes
- control group attributes. For details
- about these control group attributes
- see memory.txt.
-
-
-
- DeviceAllow=
- DeviceDeny=
-
- Control access to
- specific device nodes by the executed processes. Takes two
- space separated strings: a device node
- path (such as
- /dev/null)
- followed by a combination of r, w, m
- to control reading, writing, or
- creating of the specific device node
- by the unit, respectively. This controls the
- devices.allow
- and
- devices.deny
- control group attributes. For details
- about these control group attributes
- see devices.txt.
-
-
-
- BlockIOWeight=
-
- Set the default or
- per-device overall block IO weight
- value for the executed
- processes. Takes either a single
- weight value (between 10 and 1000) to
- set the default block IO weight, or a
- space separated pair of a file path
- and a weight value to specify the
- device specific weight value (Example:
- "/dev/sda 500"). The file path may be
- specified as path to a block device
- node or as any other file in which
- case the backing block device of the
- file system of the file is
- determined. This controls the
- blkio.weight and
- blkio.weight_device
- control group attributes, which
- default to 1000. Use this option
- multiple times to set weights for
- multiple devices. For details about
- these control group attributes see
- blkio-controller.txt.
-
-
-
- BlockIOReadBandwidth=
- BlockIOWriteBandwidth=
-
- Set the per-device
- overall block IO bandwidth limit for
- the executed processes. Takes a space
- separated pair of a file path and a
- bandwidth value (in bytes per second)
- to specify the device specific
- bandwidth. The file path may be
- specified as path to a block device
- node or as any other file in which
- case the backing block device of the
- file system of the file is determined.
- If the bandwidth is suffixed with K, M,
- G, or T the specified bandwidth is
- parsed as Kilobytes, Megabytes,
- Gigabytes, or Terabytes, respectively (Example:
- "/dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0
- 5M"). This controls the
- blkio.read_bps_device
- and
- blkio.write_bps_device
- control group attributes. Use this
- option multiple times to set bandwidth
- limits for multiple devices. For
- details about these control group
- attributes see blkio-controller.txt.
-
-
ReadWriteDirectories=ReadOnlyDirectories=InaccessibleDirectories=Sets up a new
- file-system name space for executed
+ file system namespace for executed
processes. These options may be used
to limit access a process might have
- to the main file-system
+ to the main file system
hierarchy. Each setting takes a
space-separated list of absolute
directory paths. Directories listed in
@@ -1081,16 +991,20 @@
Takes a boolean
argument. If true sets up a new file
system namespace for the executed
- processes and mounts a private
- /tmp directory
- inside it, that is not shared by
+ processes and mounts private
+ /tmp and
+ /var/tmp directories
+ inside it, that are not shared by
processes outside of the
namespace. This is useful to secure
access to temporary files of the
process, but makes sharing between
processes via
- /tmp
- impossible. Defaults to
+ /tmp or
+ /var/tmp
+ impossible. All temporary data created
+ by service will be removed after service
+ is stopped. Defaults to
false.
@@ -1153,10 +1067,10 @@
IgnoreSIGPIPE=Takes a boolean
- argument. If true causes SIGPIPE to be
+ argument. If true, causes SIGPIPE to be
ignored in the executed
- process. Defaults to true, since
- SIGPIPE generally is useful only in
+ process. Defaults to true because
+ SIGPIPE generally is useful only in
shell pipelines.
@@ -1164,7 +1078,7 @@
NoNewPrivileges=Takes a boolean
- argument. If true ensures that the
+ argument. If true, ensures that the
service process and all its children
can never gain new privileges. This
option is more powerful than the respective
@@ -1179,13 +1093,14 @@
SystemCallFilter=
- Takes a space
- separated list of system call
- names. If this setting is used all
+ Takes a space-separated
+ list of system call
+ names. If this setting is used, all
system calls executed by the unit
process except for the listed ones
will result in immediate process
- termination with the SIGSYS signal
+ termination with the
+ SIGSYS signal
(whitelisting). If the first character
of the list is ~
the effect is inverted: only the