## Name

dbus-test-tool — D-Bus traffic generator and test tool

## Synopsis

`dbus-test-tool` black-hole [ --session | --system ] [--name=`NAME`] [--no-read]

`dbus-test-tool` echo [ --session | --system ] [--name=`NAME`] [--sleep-ms=`MS`]

`dbus-test-tool` spam [ --session | --system ] [--dest=`NAME`] [--count=`N`] [--flood] [--ignore-errors] [--messages-per-conn=`N`] [--no-reply] [--queue=`N`] [--seed=`SEED`] [ --string | --bytes | --empty ] [ --payload=`S` | --stdin | --message-stdin | --random-size ]

## DESCRIPTION

dbus-test-tool is a multi-purpose tool for debugging and profiling D-Bus.

dbus-test-tool black-hole connects to D-Bus, optionally requests a name, then does not reply to messages. It normally reads and discards messages from its D-Bus socket, but can be configured to sleep forever without reading.

dbus-test-tool echo connects to D-Bus, optionally requests a name, then sends back an empty reply to every method call, after an optional delay.

dbus-test-tool spam connects to D-Bus and makes repeated method calls, normally named `com.example.Spam`.

## OPTIONS

### Common options

`--session`

  Connect to the session bus. This is the default.

`--system`

  Connect to the system bus.

### black-hole mode

`--name=``NAME`

  Before proceeding, request ownership of the well-known bus name `NAME`, for example `com.example.NoReply`. By default, no name is requested, and the tool can only be addressed by a unique bus name such as `:1.23`.

`--no-read`

  Do not read from the D-Bus socket.

### echo mode

`--name=``NAME`

  Before proceeding, request ownership of the well-known bus name `NAME`, for example `com.example.Echo`. By default, no name is requested, and the tool can only be addressed by a unique bus name such as `:1.23`.

`--sleep-ms=``MS`

  Block for `MS` milliseconds before replying to a method call.

### spam mode

`--dest=``NAME`

  Send method calls to the well-known or unique bus name `NAME`. The default is the dbus-daemon, `org.freedesktop.DBus`.

`--count=``N`

  Send `N` method calls in total. The default is 1.

`--queue=``N`

  Send `N` method calls before waiting for any replies, then send one new call per reply received, keeping `N` method calls "in flight" at all times until the number of messages specified with the `--count` option have been sent. The default is 1, unless `--flood` is used.

`--flood`

  Send all messages without waiting for a reply, equivalent to `--queue` with an arbitrarily large `N`.

`--no-reply`

  Set the "no reply desired" flag on the messages. This implies `--flood`, since it disables the replies that would be used for a finite `--queue` length.

`--messages-per-conn=``N`

  If given, send `N` method calls on the same connection, then disconnect and reconnect. The default is to use the same connection for all method calls.

`--string`

  The payload of each message is a UTF-8 string. This is the default. The actual string used is given by the `--payload` or `--stdin` option, defaulting to "hello, world!".

`--bytes`

  The payload of each message is a byte-array. The actual bytes used are given by the `--payload` or `--stdin` option, defaulting to the ASCII encoding of "hello, world!".

`--empty`

  The messages have no payload.

`--payload=``S`

  Use `S` as the `--string` or `--bytes` in the messages. The default is "hello, world!".

`--stdin`

  Read from standard input until end-of-file is reached, and use that as the `--string` or `--bytes` in the messages.

`--message-stdin`

  Read a complete binary D-Bus method call message from standard input, and use that for each method call.

`--random-size`

  Read whitespace-separated ASCII decimal numbers from standard input, choose one at random for each message, and send a message whose payload is a string of that length.

`--seed=``SEED`

  Use `SEED` as the seed for the pseudorandom number generator, to have somewhat repeatable sequences of random messages.

## BUGS

Please send bug reports to the D-Bus bug tracker or mailing list. See https://www.freedesktop.org/wiki/Software/dbus/.

## AUTHOR

See https://dbus.freedesktop.org/doc/AUTHORS

## SEE ALSO

dbus-send(1)