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diff --git a/man/systemd.exec.xml b/man/systemd.exec.xml
index 207592dda..a9e54cb03 100644
--- a/man/systemd.exec.xml
+++ b/man/systemd.exec.xml
@@ -295,9 +295,11 @@
for the assignment.
Example:
- Environment="VAR1=word1 word2" VAR2=word3 "VAR3=word 5 6"
+ Environment="VAR1=word1 word2" VAR2=word3 "VAR3=$word 5 6"
gives three variables VAR1,
- VAR2, VAR3.
+ VAR2, VAR3
+ with the values word1 word2,
+ word3, $word 5 6.
@@ -470,9 +472,9 @@
StandardError=
Controls where file
- descriptor 2 (STDERR) of the executed
- processes is connected to. The
- available options are identical to
+ descriptor 2 (standard error) of the
+ executed processes is connected to.
+ The available options are identical to
those of
StandardOutput=,
with one exception: if set to
@@ -489,8 +491,8 @@
TTYPath=
Sets the terminal
- device node to use if standard input,
- output or stderr are connected to a
+ device node to use if standard input, output,
+ or error are connected to a
TTY (see above). Defaults to
/dev/console.
@@ -847,7 +849,7 @@
processes and mounts private
/tmp and
/var/tmp
- directories inside it, that are not
+ directories inside it that is not
shared by processes outside of the
namespace. This is useful to secure
access to temporary files of the
@@ -857,7 +859,7 @@
/var/tmp
impossible. All temporary data created
by service will be removed after
- service is stopped. Defaults to
+ the service is stopped. Defaults to
false. Note that it is possible to run
two or more units within the same
private /tmp and
@@ -892,6 +894,24 @@
for details.
+
+ PrivateDevices=
+
+ Takes a boolean
+ argument. If true, sets up a new /dev
+ namespace for the executed processes
+ and only adds API pseudo devices such
+ as /dev/null,
+ /dev/zero or
+ /dev/random to
+ it, but no physical devices such as
+ /dev/sda. This is
+ useful to securely turn off physical
+ device access by the executed
+ process. Defaults to
+ false.
+
+
MountFlags=
@@ -930,6 +950,23 @@
this service.
+
+ SELinuxContext=
+
+ Set the SELinux
+ security context of the executed
+ process. If set, this will override
+ the automated domain
+ transition. However, the policy still
+ needs to autorize the transition. This
+ directive is ignored if SELinux is
+ disabled. If prefixed by
+ -, all errors will
+ be ignored. See
+ setexeccon3
+ for details.
+
+
IgnoreSIGPIPE=
@@ -964,7 +1001,7 @@
list of system call
names. If this setting is used, all
system calls executed by the unit
- process except for the listed ones
+ processes except for the listed ones
will result in immediate process
termination with the
SIGSYS signal
@@ -992,7 +1029,97 @@
merged. If the empty string is
assigned, the filter is reset, all
prior assignments will have no
- effect.
+ effect.
+
+ If you specify both types of
+ this option (i.e. whitelisting and
+ blacklisting) the first encountered
+ will take precedence and will dictate
+ the default action (termination or
+ approval of a system call). Then the
+ next occurrences of this option will
+ add or delete the listed system calls
+ from the set of the filtered system
+ calls, depending of its type and the
+ default action (e.g. You have started
+ with a whitelisting of
+ read and
+ write and right
+ after it add a blacklisting of
+ write, then
+ write will be
+ removed from the set).
+
+
+ Note that setting
+ SystemCallFilter=
+ implies a
+ SystemCallArchitectures=
+ setting of native
+ (see below), unless that option is
+ configured otherwise.
+
+
+
+ SystemCallErrorNumber=
+
+ Takes an
+ errno error number
+ name to return when the system call
+ filter configured with
+ SystemCallFilter=
+ is triggered, instead of terminating
+ the process immediately. Takes an
+ error name such as
+ EPERM,
+ EACCES or
+ EUCLEAN. When this
+ setting is not used, or when the empty
+ string is assigned the process will be
+ terminated immediately when the filter
+ is triggered.
+
+
+
+ SystemCallArchitectures=
+
+ Takes a space
+ separated list of architecture
+ identifiers to include in the system
+ call filter. The known architecture
+ identifiers are
+ x86,
+ x86-64,
+ x32,
+ arm as well as the
+ special identifier
+ native. Only system
+ calls of the specified architectures
+ will be permitted to processes of this
+ unit. This is an effective way to
+ disable compatibility with non-native
+ architectures for processes, for
+ example to prohibit execution of 32bit
+ x86 binaries on 64bit x86-64
+ systems. The special
+ native identifier
+ implicitly maps to the native
+ architecture of the system (or more
+ strictly: to the architecture the
+ system manager is compiled for). Note
+ that setting this option to a
+ non-empty list implies that
+ native is included
+ too. By default this option is set to
+ the empty list, i.e. no architecture
+ system call filtering is applied. Note
+ that configuring a system call filter
+ with
+ SystemCallFilter=
+ (above) implies a
+ native architecture
+ list, unless configured
+ otherwise.