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+.TH RSTYXD 8
+.SH NAME
+rstyxd \- Styx-based remote execution and file service
+.SH SYNOPSIS
+.B auxi/rstyxd
+.I alg
+\&...
+.SH DESCRIPTION
+.PP
+.I Rstyxd
+provides a remote-execution service.
+Having authorised the client and optionally established
+.IR ssl ,
+as described above,
+it reads a single line from its standard input.
+The line contains a decimal value that is the count of the number
+of bytes that follow,
+which
+.I rstyxd
+reads as a
+.IR utf (6)-encoded
+string.
+The string contains a command, which is parsed into arguments,
+following the quoting
+conventions of
+.IR sh (1).
+The first argument is the command name.
+.I Rstyxd
+prepares a modified name space in which
+to run the command.
+It mounts the connection (standard input) on
+.BR /n/client ,
+binds
+.BR /n/client/dev
+onto
+.BR /dev ,
+and opens the new
+.B /dev/cons
+(ie, the remote client's
+.BR /dev/cons )
+on file descriptors 0, 1 and 2.
+Finally, it executes the command.
+.PP
+.I Rstyxd
+is normally started by
+.IR svc (8)
+in response to incoming network calls.
+It expects the standard input to be connected to the client;
+unusually, it is both read and written.
+It
+first authenticates the incoming call using
+.IR keyring-auth (2)
+via
+.IR security-auth (2).
+On successful authorisation, the server sets
+its user identity to that of the caller,
+and the client can request that a digest and/or encryption
+algorithm be applied using
+.IR ssl (3)
+to protect the data exchanged with the server.
+Each
+.I alg
+names a digest or encryption algorithm that the server will allow
+the client to use,
+in any form accepted by
+.IR ssl ;
+the special name
+.B none
+is usually listed, to allow the client to choose not to use
+.IR ssl .
+.SH FILES
+.TF /usr/user/keyring/default
+.TP
+.B /n/client
+mount point used by
+.I rstyxd
+.TP
+.BI /usr/ user /keyring/default
+server's authentication data when
+.IR svc (8)
+run as given
+.I user
+.SH SOURCE
+.B /appl/cmd/auxi/rstyxd.b
+.SH SEE ALSO
+.IR keyring-auth (2),
+.IR security-auth (2),
+.IR getauthinfo (8)