# man > systemd-stdio-bridge(1)

> **TLDR:** Implement a proxy between `stdin`/`stdout` and a D-Bus.
>
- Forward `stdin`/`stdout` to the local system bus:
  `systemd-stdio-bridge`
- Forward `stdin`/`stdout` to a specific user's D-Bus:
  `systemd-stdio-bridge --{{user}}`
- Forward `stdin`/`stdout` to the local system bus within a specific container:
  `systemd-stdio-bridge {{-M|--machine}} {{mycontainer}}`
- Forward `stdin`/`stdout` to a custom D-Bus address:
  `systemd-stdio-bridge {{-p|--bus-path}} unix:path=/{{path/to/dbus_socket}}`

*Source: tldr-pages*

---

[_SYSTEMD-STDIO-BRIDGE_(1)](https://www.chedong.com/phpMan.php/man/SYSTEMD-STDIO-BRIDGE/1/markdown)                 systemd-stdio-bridge                 [_SYSTEMD-STDIO-BRIDGE_(1)](https://www.chedong.com/phpMan.php/man/SYSTEMD-STDIO-BRIDGE/1/markdown)

## NAME
       systemd-stdio-bridge - D-Bus proxy

## SYNOPSIS


       **systemd-stdio-bridge **[OPTIONS...]

## DESCRIPTION
       **systemd-stdio-bridge **implements a proxy between STDIN/STDOUT and a D-Bus bus. It expects to
       receive an open connection via STDIN/STDOUT when started, and will create a new connection to
       the specified bus. It will then forward messages between the two connections. This program is
       suitable for socket activation: the first connection may be a pipe or a socket and must be
       passed as either standard input, or as an open file descriptor according to the protocol
       described in [**sd_listen_fds**(3)](https://www.chedong.com/phpMan.php/man/sdlistenfds/3/markdown). The second connection will be made by default to the local
       system bus, but this can be influenced by the **--user**, **--system**, **--machine=**, and **--bus-path=**
       options described below.

       [**sd-bus**(3)](https://www.chedong.com/phpMan.php/man/sd-bus/3/markdown) uses **systemd-stdio-bridge **to forward D-Bus connections over [**ssh**(1)](https://www.chedong.com/phpMan.php/man/ssh/1/markdown), or to connect
       to the bus of a different user, see [**sd_bus_set_address**(3)](https://www.chedong.com/phpMan.php/man/sdbussetaddress/3/markdown).

## OPTIONS
       The following options are understood:

### --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.

### -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.

### -p _ --bus-path=_
           Path to the bus address. Default: "unix:path=/run/dbus/system_bus_socket"

           Added in version 251.

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

### --version
           Print a short version string and exit.

## EXIT STATUS
       On success, 0 is returned, a non-zero failure code otherwise.

## SEE ALSO
       [**dbus-daemon**(1)](https://www.chedong.com/phpMan.php/man/dbus-daemon/1/markdown), [**dbus-broker**(1)](https://www.chedong.com/phpMan.php/man/dbus-broker/1/markdown), **D-Bus**[1], [**systemd**(1)](https://www.chedong.com/phpMan.php/man/systemd/1/markdown)

## NOTES
        1. D-Bus
           <https://www.freedesktop.org/wiki/Software/dbus>

systemd 255                                                                  [_SYSTEMD-STDIO-BRIDGE_(1)](https://www.chedong.com/phpMan.php/man/SYSTEMD-STDIO-BRIDGE/1/markdown)