Provided by: systemd_256.4-2ubuntu1_amd64 bug

NAME

       systemd-run - Run programs in transient scope units, service units, or path-, socket-, or
       timer-triggered service units

SYNOPSIS

       systemd-run [OPTIONS...] COMMAND [ARGS...]

       systemd-run [OPTIONS...] [PATH OPTIONS...] {COMMAND} [ARGS...]

       systemd-run [OPTIONS...] [SOCKET OPTIONS...] {COMMAND} [ARGS...]

       systemd-run [OPTIONS...] [TIMER OPTIONS...] {COMMAND} [ARGS...]

DESCRIPTION

       systemd-run may be used to create and start a transient .service or .scope unit and run
       the specified COMMAND in it. It may also be used to create and start a transient .path,
       .socket, or .timer unit, that activates a .service unit when elapsing.

       If a command is run as transient service unit, it will be started and managed by the
       service manager like any other service, and thus shows up in the output of systemctl
       list-units like any other unit. It will run in a clean and detached execution environment,
       with the service manager as its parent process. In this mode, systemd-run will start the
       service asynchronously in the background and return after the command has begun execution
       (unless --no-block, --wait, --pipe, or --pty are specified, see below).

       If a command is run as transient scope unit, it will be executed by systemd-run itself as
       parent process and will thus inherit the execution environment of the caller. However, the
       processes of the command are managed by the service manager similarly to normal services,
       and will show up in the output of systemctl list-units. Execution in this case is
       synchronous, and will return only when the command finishes. This mode is enabled via the
       --scope switch (see below).

       If a command is run with path, socket, or timer options such as --on-calendar= (see
       below), a transient path, socket, or timer unit is created alongside the service unit for
       the specified command. Only the transient path, socket, or timer unit is started
       immediately, the transient service unit will be triggered by the path, socket, or timer
       unit. If the --unit= option is specified, the COMMAND may be omitted. In this case,
       systemd-run creates only a .path, .socket, or .timer unit that triggers the specified
       unit.

       By default, services created with systemd-run default to the simple type, see the
       description of Type= in systemd.service(5) for details. Note that when this type is used,
       the service manager (and thus the systemd-run command) considers service start-up
       successful as soon as the fork() for the main service process succeeded, i.e. before the
       execve() is invoked, and thus even if the specified command cannot be started. Consider
       using the exec service type (i.e.  --property=Type=exec) to ensure that systemd-run
       returns successfully only if the specified command line has been successfully started.

       After systemd-run passes the command to the service manager, the manager performs variable
       expansion. This means that dollar characters ("$") which should not be expanded need to be
       escaped as "$$". Expansion can also be disabled using --expand-environment=no.

OPTIONS

       The following options are understood:

       --no-ask-password
           Do not query the user for authentication for privileged operations.

           Added in version 226.

       --scope
           Create a transient .scope unit instead of the default transient .service unit (see
           above).

           Added in version 206.

       --unit=, -u
           Use this unit name instead of an automatically generated one.

           Added in version 206.

       --property=, -p
           Sets a property on the scope or service unit that is created. This option takes an
           assignment in the same format as systemctl(1)'s set-property command.

           Added in version 211.

       --description=
           Provide a description for the service, scope, path, socket, or timer unit. If not
           specified, the command itself will be used as a description. See Description= in
           systemd.unit(5).

           Added in version 206.

       --slice=
           Make the new .service or .scope unit part of the specified slice, instead of
           system.slice (when running in --system mode) or the root slice (when running in --user
           mode).

           Added in version 206.

       --slice-inherit
           Make the new .service or .scope unit part of the slice the systemd-run itself has been
           invoked in. This option may be combined with --slice=, in which case the slice
           specified via --slice= is placed within the slice the systemd-run command is invoked
           in.

           Example: consider systemd-run being invoked in the slice foo.slice, and the --slice=
           argument is bar. The unit will then be placed under foo-bar.slice.

           Added in version 246.

       --expand-environment=BOOL
           Expand environment variables in command arguments. If enabled, environment variables
           specified as "${VARIABLE}" will be expanded in the same way as in commands specified
           via ExecStart= in units. With --scope, this expansion is performed by systemd-run
           itself, and in other cases by the service manager that spawns the command. Note that
           this is similar to, but not the same as variable expansion in bash(1) and other
           shells.

           The default is to enable this option in all cases, except for --scope where it is
           disabled by default, for backward compatibility reasons. Note that this will be
           changed in a future release, where it will be switched to enabled by default as well.

           See systemd.service(5) for a description of variable expansion. Disabling variable
           expansion is useful if the specified command includes or may include a "$" sign.

           Added in version 254.

       -r, --remain-after-exit
           After the service process has terminated, keep the service around until it is
           explicitly stopped. This is useful to collect runtime information about the service
           after it finished running. Also see RemainAfterExit= in systemd.service(5).

           Added in version 207.

       --send-sighup
           When terminating the scope or service unit, send a SIGHUP immediately after SIGTERM.
           This is useful to indicate to shells and shell-like processes that the connection has
           been severed. Also see SendSIGHUP= in systemd.kill(5).

           Added in version 207.

       --service-type=
           Sets the service type. Also see Type= in systemd.service(5). This option has no effect
           in conjunction with --scope. Defaults to simple.

           Added in version 211.

       --uid=, --gid=
           Runs the service process under the specified UNIX user and group. Also see User= and
           Group= in systemd.exec(5).

           Added in version 211.

       --nice=
           Runs the service process with the specified nice level. Also see Nice= in
           systemd.exec(5).

           Added in version 211.

       --working-directory=
           Runs the service process with the specified working directory. Also see
           WorkingDirectory= in systemd.exec(5).

           Added in version 240.

       --same-dir, -d
           Similar to --working-directory=, but uses the current working directory of the caller
           for the service to execute.

           Added in version 240.

       -E NAME[=VALUE], --setenv=NAME[=VALUE]
           Runs the service process with the specified environment variable set. This parameter
           may be used more than once to set multiple variables. When "=" and VALUE are omitted,
           the value of the variable with the same name in the program environment will be used.

           Also see Environment= in systemd.exec(5).

           Added in version 211.

       --pty, -t
           When invoking the command, the transient service connects its standard input, output
           and error to the terminal systemd-run is invoked on, via a pseudo TTY device. This
           allows running programs that expect interactive user input/output as services, such as
           interactive command shells.

           This option will result in systemd-run synchronously waiting for the transient service
           to terminate, similar to specifying --wait. If specified along with --wait,
           systemd-run won't exit when manually disconnecting from the pseudo TTY device.

           Note that machinectl(1)'s shell command is usually a better alternative for requesting
           a new, interactive login session on the local host or a local container.

           See below for details on how this switch combines with --pipe.

           Added in version 219.

       --pipe, -P
           If specified, standard input, output, and error of the transient service are inherited
           from the systemd-run command itself. This allows systemd-run to be used within shell
           pipelines.

           Note that this mode is not suitable for interactive command shells and similar, as the
           service process will not become a TTY controller when invoked on a terminal. Use --pty
           instead in that case.

           When both --pipe and --pty are used in combination the more appropriate option is
           automatically determined and used. Specifically, when invoked with standard input,
           output and error connected to a TTY --pty is used, and otherwise --pipe.

           This option will result in systemd-run synchronously waiting for the transient service
           to terminate, similar to specifying --wait.

           When this option is used the original file descriptors systemd-run receives are passed
           to the service processes as-is. If the service runs with different privileges than
           systemd-run, this means the service might not be able to reopen the passed file
           descriptors, due to normal file descriptor access restrictions. If the invoked process
           is a shell script that uses the echo "hello" >/dev/stderr construct for writing
           messages to stderr, this might cause problems, as this only works if stderr can be
           reopened. To mitigate this use the construct echo "hello" >&2 instead, which is mostly
           equivalent and avoids this pitfall.

           Added in version 235.

       --shell, -S
           A shortcut for "--pty --same-dir --wait --collect --service-type=exec $SHELL", i.e.
           requests an interactive shell in the current working directory, running in service
           context, accessible with a single switch.

           Added in version 240.

       --quiet, -q
           Suppresses additional informational output while running. This is particularly useful
           in combination with --pty when it will suppress the initial message explaining how to
           terminate the TTY connection.

           Added in version 219.

       --on-active=, --on-boot=, --on-startup=, --on-unit-active=, --on-unit-inactive=
           Defines a monotonic timer relative to different starting points for starting the
           specified command. See OnActiveSec=, OnBootSec=, OnStartupSec=, OnUnitActiveSec= and
           OnUnitInactiveSec= in systemd.timer(5) for details. These options are shortcuts for
           --timer-property= with the relevant properties. These options may not be combined with
           --scope or --pty.

           Added in version 218.

       --on-calendar=
           Defines a calendar timer for starting the specified command. See OnCalendar= in
           systemd.timer(5). This option is a shortcut for --timer-property=OnCalendar=. This
           option may not be combined with --scope or --pty.

           Added in version 218.

       --on-clock-change, --on-timezone-change
           Defines a trigger based on system clock jumps or timezone changes for starting the
           specified command. See OnClockChange= and OnTimezoneChange= in systemd.timer(5). These
           options are shortcuts for --timer-property=OnClockChange=yes and
           --timer-property=OnTimezoneChange=yes. These options may not be combined with --scope
           or --pty.

           Added in version 242.

       --path-property=, --socket-property=, --timer-property=
           Sets a property on the path, socket, or timer unit that is created. This option is
           similar to --property=, but applies to the transient path, socket, or timer unit
           rather than the transient service unit created. This option takes an assignment in the
           same format as systemctl(1)'s set-property command. These options may not be combined
           with --scope or --pty.

           Added in version 218.

       --no-block
           Do not synchronously wait for the unit start operation to finish. If this option is
           not specified, the start request for the transient unit will be verified, enqueued and
           systemd-run will wait until the unit's start-up is completed. By passing this
           argument, it is only verified and enqueued. This option may not be combined with
           --wait.

           Added in version 220.

       --wait
           Synchronously wait for the transient service to terminate. If this option is
           specified, the start request for the transient unit is verified, enqueued, and waited
           for. Subsequently the invoked unit is monitored, and it is waited until it is
           deactivated again (most likely because the specified command completed). On exit,
           terse information about the unit's runtime is shown, including total runtime (as well
           as CPU usage, if --property=CPUAccounting=1 was set) and the exit code and status of
           the main process. This output may be suppressed with --quiet. This option may not be
           combined with --no-block, --scope or the various path, socket, or timer options.

           Added in version 232.

       -G, --collect
           Unload the transient unit after it completed, even if it failed. Normally, without
           this option, all units that ran and failed are kept in memory until the user
           explicitly resets their failure state with systemctl reset-failed or an equivalent
           command. On the other hand, units that ran successfully are unloaded immediately. If
           this option is turned on the "garbage collection" of units is more aggressive, and
           unloads units regardless if they exited successfully or failed. This option is a
           shortcut for --property=CollectMode=inactive-or-failed, see the explanation for
           CollectMode= in systemd.unit(5) for further information.

           Added in version 236.

       --ignore-failure
           By default, if the specified command fails the invoked unit will be marked failed
           (though possibly still unloaded, see --collect=, above), and this is reported in the
           logs. If this switch is specified this is suppressed and any non-success exit
           status/code of the command is treated as success.

           Added in version 256.

       --background=COLOR
           Change the terminal background color to the specified ANSI color as long as the
           session lasts. The color specified should be an ANSI X3.64 SGR background color, i.e.
           strings such as "40", "41", ..., "47", "48;2;...", "48;5;...". See ANSI Escape Code
           (Wikipedia)[1] for details.

           Added in version 256.

       --user
           Talk to the service manager of the calling user, rather than the service manager of
           the system.

       --system
           Talk to the service manager of the system. This is the implied default.

       -H, --host=
           Execute the operation remotely. Specify a hostname, or a username and hostname
           separated by "@", to connect to. The hostname may optionally be suffixed by a port ssh
           is listening on, separated by ":", and then a container name, separated by "/", which
           connects directly to a specific container on the specified host. This will use SSH to
           talk to the remote machine manager instance. Container names may be enumerated with
           machinectl -H HOST. Put IPv6 addresses in brackets.

       -M, --machine=
           Execute operation on a local container. Specify a container name to connect to,
           optionally prefixed by a user name to connect as and a separating "@" character. If
           the special string ".host" is used in place of the container name, a connection to the
           local system is made (which is useful to connect to a specific user's user bus:
           "--user --machine=lennart@.host"). If the "@" syntax is not used, the connection is
           made as root user. If the "@" syntax is used either the left hand side or the right
           hand side may be omitted (but not both) in which case the local user name and ".host"
           are implied.

       -C, --capsule=
           Execute operation on a capsule. Specify a capsule name to connect to. See
           capsule@.service(5) for details about capsules.

           Added in version 256.

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

       All command line arguments after the first non-option argument become part of the command
       line of the launched process.

EXIT STATUS

       On success, 0 is returned. If systemd-run failed to start the service, a non-zero return
       value will be returned. If systemd-run waits for the service to terminate, the return
       value will be propagated from the service. 0 will be returned on success, including all
       the cases where systemd considers a service to have exited cleanly, see the discussion of
       SuccessExitStatus= in systemd.service(5).

EXAMPLES

       Example 1. Logging environment variables provided by systemd to services

           # systemd-run env
           Running as unit: run-19945.service
           # journalctl -u run-19945.service
           Sep 08 07:37:21 bupkis systemd[1]: Starting /usr/bin/env...
           Sep 08 07:37:21 bupkis systemd[1]: Started /usr/bin/env.
           Sep 08 07:37:21 bupkis env[19948]: PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
           Sep 08 07:37:21 bupkis env[19948]: LANG=en_US.UTF-8
           Sep 08 07:37:21 bupkis env[19948]: BOOT_IMAGE=/vmlinuz-3.11.0-0.rc5.git6.2.fc20.x86_64

       Example 2. Limiting resources available to a command

           # systemd-run -p IOWeight=10 updatedb

       This command invokes the updatedb(8) tool, but lowers the block I/O weight for it to 10.
       See systemd.resource-control(5) for more information on the IOWeight= property.

       Example 3. Running commands at a specified time

       The following command will touch a file after 30 seconds.

           # date; systemd-run --on-active=30 --timer-property=AccuracySec=100ms /bin/touch /tmp/foo
           Mon Dec  8 20:44:24 KST 2014
           Running as unit: run-71.timer
           Will run service as unit: run-71.service
           # journalctl -b -u run-71.timer
           -- Journal begins at Fri 2014-12-05 19:09:21 KST, ends at Mon 2014-12-08 20:44:54 KST. --
           Dec 08 20:44:38 container systemd[1]: Starting /bin/touch /tmp/foo.
           Dec 08 20:44:38 container systemd[1]: Started /bin/touch /tmp/foo.
           # journalctl -b -u run-71.service
           -- Journal begins at Fri 2014-12-05 19:09:21 KST, ends at Mon 2014-12-08 20:44:54 KST. --
           Dec 08 20:44:48 container systemd[1]: Starting /bin/touch /tmp/foo...
           Dec 08 20:44:48 container systemd[1]: Started /bin/touch /tmp/foo.

       Example 4. Allowing access to the tty

       The following command invokes bash(1) as a service passing its standard input, output and
       error to the calling TTY.

           # systemd-run -t --send-sighup bash

       Example 5. Start screen as a user service

           $ systemd-run --scope --user screen
           Running scope as unit run-r14b0047ab6df45bfb45e7786cc839e76.scope.

           $ screen -ls
           There is a screen on:
                   492..laptop     (Detached)
           1 Socket in /var/run/screen/S-fatima.

       This starts the screen process as a child of the systemd --user process that was started
       by user@.service, in a scope unit. A systemd.scope(5) unit is used instead of a
       systemd.service(5) unit, because screen will exit when detaching from the terminal, and a
       service unit would be terminated. Running screen as a user unit has the advantage that it
       is not part of the session scope. If KillUserProcesses=yes is configured in
       logind.conf(5), the default, the session scope will be terminated when the user logs out
       of that session.

       The user@.service is started automatically when the user first logs in, and stays around
       as long as at least one login session is open. After the user logs out of the last
       session, user@.service and all services underneath it are terminated. This behavior is the
       default, when "lingering" is not enabled for that user. Enabling lingering means that
       user@.service is started automatically during boot, even if the user is not logged in, and
       that the service is not terminated when the user logs out.

       Enabling lingering allows the user to run processes without being logged in, for example
       to allow screen to persist after the user logs out, even if the session scope is
       terminated. In the default configuration, users can enable lingering for themselves:

           $ loginctl enable-linger

       Example 6. Variable expansion by the manager

           $ systemd-run -t echo "<${INVOCATION_ID}>" '<${INVOCATION_ID}>'
                 <> <5d0149bfa2c34b79bccb13074001eb20>

       The first argument is expanded by the shell (double quotes), but the second one is not
       expanded by the shell (single quotes).  echo(1) is called with ["/usr/bin/echo", "<>",
       "<${INVOCATION_ID}>"] as the argument array, and then systemd(1) generates
       ${INVOCATION_ID} and substitutes it in the command-line. This substitution could not be
       done on the client side, because the target ID that will be set for the service isn't
       known before the call is made.

       Example 7. Variable expansion and output redirection using a shell

       Variable expansion by systemd(1) can be disabled with --expand-environment=no.

       Disabling variable expansion can be useful if the command to execute contains dollar
       characters and escaping them would be inconvenient. For example, when a shell is used:

           $ systemd-run --expand-environment=no -t bash \
                 -c 'echo $SHELL $$ >/dev/stdout'
           /bin/bash 12345

       The last argument is passed verbatim to the bash(1) shell which is started by the service
       unit. The shell expands "$SHELL" to the path of the shell, and "$$" to its process number,
       and then those strings are passed to the echo built-in and printed to standard output
       (which in this case is connected to the calling terminal).

       Example 8. Return value

           $ systemd-run --user --wait true
           $ systemd-run --user --wait -p SuccessExitStatus=11 bash -c 'exit 11'
           $ systemd-run --user --wait -p SuccessExitStatus=SIGUSR1 --expand-environment=no \
                 bash -c 'kill -SIGUSR1 $$'

       Those three invocations will succeed, i.e. terminate with an exit code of 0.

SEE ALSO

       systemd(1), systemctl(1), systemd.unit(5), systemd.service(5), systemd.scope(5),
       systemd.slice(5), systemd.exec(5), systemd.resource-control(5), systemd.timer(5), systemd-
       mount(1), machinectl(1), run0(1)

NOTES

        1. ANSI Escape Code (Wikipedia)
           https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_(Select_Graphic_Rendition)_parameters