162 lines
4.2 KiB
Groff
162 lines
4.2 KiB
Groff
.\" $NetBSD: rcmd.1,v 1.18 2004/09/05 08:48:32 wiz Exp $
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.\"
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.\" Copyright (c) 1997 Matthew R. Green.
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.\" Copyright (c) 1983, 1990 The Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)rsh.1 6.10 (Berkeley) 7/24/91
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.\" from: NetBSD: rsh.1,v 1.3 1997/01/09 20:21:14 tls Exp
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.\"
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.Dd September 5, 2004
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.Dt RCMD 1
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.Os
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.Sh NAME
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.Nm rcmd
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.Nd backend driver for
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.Xr rcmd 3
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.Sh SYNOPSIS
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.Nm
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.Op Fl l Ar username
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.Op Fl u Ar localusername
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.Ar host
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.Ar command
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.Sh DESCRIPTION
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.Nm
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executes
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.Ar command
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on
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.Ar host .
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.Pp
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.Nm
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copies its standard input to the remote command, the standard
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output of the remote command to its standard output, and the
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standard error of the remote command to its standard error.
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Interrupt, quit and terminate signals are propagated to the remote
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command;
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.Nm
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normally terminates when the remote command does.
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The options are as follows:
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.Bl -tag -width flag
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.It Fl d
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The
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.Fl d
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option turns on socket debugging (using
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.Xr setsockopt 2 )
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on the
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.Tn TCP
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sockets used for communication with the remote host.
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.It Fl l
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By default, the remote username is the same as the local username.
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The
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.Fl l
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option allows the remote name to be specified.
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.It Fl u
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The
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.Fl u
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option allows the local username to be specified.
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Only the superuser is allowed to use this option.
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.It Fl n
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The
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.Fl n
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option redirects input from the special device
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.Pa /dev/null
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(see the
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.Sx BUGS
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section of this manual page).
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.El
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.Pp
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Shell metacharacters which are not quoted are interpreted on local machine,
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while quoted metacharacters are interpreted on the remote machine.
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For example, the command
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.Pp
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.Dl rcmd otherhost cat remotefile \*[Gt]\*[Gt] localfile
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.Pp
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appends the remote file
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.Ar remotefile
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to the local file
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.Ar localfile ,
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while
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.Pp
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.Dl rcmd otherhost cat remotefile \&"\*[Gt]\*[Gt]\&" other_remotefile
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.Pp
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appends
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.Ar remotefile
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to
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.Ar other_remotefile .
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.Sh FILES
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.Bl -tag -width /etc/hosts -compact
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.It Pa /etc/hosts
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.El
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.Sh SEE ALSO
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.Xr rsh 1 ,
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.Xr rcmd 3 ,
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.Xr environ 7
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.Sh HISTORY
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The
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.Nm
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command appeared in
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.Nx 1.3
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and is primarily derived from
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.Xr rsh 1 .
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Its purpose was to create a backend driver for
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.Xr rcmd 3
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that would allow the users of
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.Xr rcmd 3
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to no longer require super-user privileges.
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.Sh BUGS
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If you are using
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.Xr csh 1
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and put a
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.Nm
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in the background without redirecting its input away from the terminal,
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it will block even if no reads are posted by the remote command.
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If no input is desired you should redirect the input of
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.Nm
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to
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.Pa /dev/null
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using the
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.Fl n
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option.
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.Pp
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You cannot use
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.Nm rcmd
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to run an interactive command (like
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.Xr rogue 6
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or
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.Xr vi 1 ) .
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Use
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.Xr rlogin 1
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instead.
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.Pp
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The stop signal,
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.Dv SIGSTOP ,
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will stop the local
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.Nm
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process only.
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This is arguably wrong, but currently hard to fix for reasons
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too complicated to explain here.
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