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21e9d0cafa
Fill in the previously empty rexecd page with a description of the daemon, its listening port/RPMsg name, usage, and all command-line options (-4/-6/-r/-t), including the new -t threadless option that serves each connection inline without a per-connection worker thread. Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com>
42 lines
1.4 KiB
ReStructuredText
42 lines
1.4 KiB
ReStructuredText
==================================
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``rexecd`` Remote Execution Server
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==================================
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``rexecd`` is the daemon that serves remote execution requests from the
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``rexec`` client. For the IP families it listens on the rexec port
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(``REXECD_PORT``, 512); for ``AF_RPMSG`` it listens on a corresponding
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RPMsg socket name. It authenticates the request and runs the requested
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command, piping its output back to the client.
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By default ``rexecd`` spawns a detached worker thread per accepted
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connection so that multiple sessions can run concurrently.
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Usage
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=====
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.. code-block:: none
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rexecd [-4|-6|-r] [-t]
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Options
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=======
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``-4``
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Specify the address family as ``AF_INET`` (IPv4). This is the default.
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``-6``
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Specify the address family as ``AF_INET6`` (IPv6).
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``-r``
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Specify the address family as ``AF_RPMSG``. This serves the daemon over
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an RPMsg link instead of TCP/IP, allowing a remote processor in an AMP
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system to execute commands. See :doc:`/components/drivers/special/rpmsg/concepts`
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for details on RPMsg.
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``-t``
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Serve each connection inline in the main task instead of spawning a
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per-connection worker thread. This avoids allocating the worker stack
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(``CONFIG_NETUTILS_REXECD_STACKSIZE``) from the heap, which helps on
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low-memory targets. With this option connections are served strictly
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one at a time: a long-running or interactive command blocks the accept
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loop until it finishes.
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