rsh.tproj/rsh.1

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  32 .\"     @(#)rsh.1       8.1 (Berkeley) 6/6/93
  33 .\" $FreeBSD: src/usr.bin/rsh/rsh.1,v 1.17 2002/04/20 12:16:41 charnier Exp $
  34 .\"
  35 .Dd June 6, 1993
  36 .Dt RSH 1
  37 .Os
  38 .Sh NAME
  39 .Nm rsh
  40 .Nd remote shell
  41 .Sh SYNOPSIS
  42 .Nm
  43 .Op Fl 46dn
  44 .Op Fl t Ar timeout
  45 .Op Fl l Ar username
  46 .Ar host
  47 .Op command
  48 .Sh DESCRIPTION
  49 The
  50 .Nm
  51 utility executes
  52 .Ar command
  53 on
  54 .Ar host .
  55 .Pp
  56 The
  57 .Nm
  58 utility copies its standard input to the remote command, the standard
  59 output of the remote command to its standard output, and the
  60 standard error of the remote command to its standard error.
  61 Interrupt, quit and terminate signals are propagated to the remote
  62 command;
  63 .Nm
  64 normally terminates when the remote command does.
  65 The options are as follows:
  66 .Bl -tag -width flag
  67 .It Fl 4
  68 Use IPv4 addresses only.
  69 .It Fl 6
  70 Use IPv6 addresses only.
  71 .It Fl d
  72 Turn on socket debugging (using
  73 .Xr setsockopt 2 )
  74 on the
  75 .Tn TCP
  76 sockets used for communication with the remote host.
  77 .It Fl l Ar username
  78 Allow the remote
  79 .Ar username
  80 to be specified.
  81 By default, the remote username is the same as the local username.
  82 .It Fl n
  83 Redirect input from the special device
  84 .Pa /dev/null
  85 (see the
  86 .Sx BUGS
  87 section of this manual page).
  88 .It Fl t Ar timeout
  89 Allow a
  90 .Ar timeout
  91 to be specified (in seconds).  If no
  92 data is sent or received in this time,
  93 .Nm
  94 will exit.
  95 .El
  96 .Pp
  97 If no
  98 .Ar command
  99 is specified, you will be logged in on the remote host using
 100 .Xr rlogin 1 .
 101 .Pp
 102 Shell metacharacters which are not quoted are interpreted on local machine,
 103 while quoted metacharacters are interpreted on the remote machine.
 104 For example, the command
 105 .Pp
 106 .Dl rsh otherhost cat remotefile >> localfile
 107 .Pp
 108 appends the remote file
 109 .Ar remotefile
 110 to the local file
 111 .Ar localfile ,
 112 while
 113 .Pp
 114 .Dl rsh otherhost cat remotefile \&">>\&" other_remotefile
 115 .Pp
 116 appends
 117 .Ar remotefile
 118 to
 119 .Ar other_remotefile .
 120 .\" .Pp
 121 .\" Many sites specify a large number of host names as commands in the
 122 .\" directory /usr/hosts.
 123 .\" If this directory is included in your search path, you can use the
 124 .\" shorthand ``host command'' for the longer form ``rsh host command''.
 125 .Sh FILES
 126 .Bl -tag -width /etc/hosts -compact
 127 .It Pa /etc/hosts
 128 .It Pa /etc/auth.conf
 129 .El
 130 .Sh SEE ALSO
 131 .Xr rlogin 1 ,
 132 .Xr setsockopt 2 ,
 133 .Xr rcmd 3 ,
 134 .Xr ruserok 3 ,
 135 .Xr auth.conf 5 ,
 136 .Xr hosts 5 ,
 137 .Xr hosts.equiv 5 ,
 138 .Xr rlogind 8 ,
 139 .Xr rshd 8
 140 .Sh HISTORY
 141 The
 142 .Nm
 143 command appeared in
 144 .Bx 4.2 .
 145 .Sh BUGS
 146 If you are using
 147 .Xr csh  1
 148 and put a
 149 .Nm
 150 in the background without redirecting its input away from the terminal,
 151 it will block even if no reads are posted by the remote command.
 152 If no input is desired you should redirect the input of
 153 .Nm
 154 to
 155 .Pa /dev/null
 156 using the
 157 .Fl n
 158 option.
 159 .Pp
 160 You cannot run an interactive command
 161 (like
 162 .Xr rogue 6
 163 or
 164 .Xr vi 1 )
 165 using
 166 .Nm ;
 167 use
 168 .Xr rlogin 1
 169 instead.
 170 .Pp
 171 Stop signals stop the local
 172 .Nm
 173 process only; this is arguably wrong, but currently hard to fix for reasons
 174 too complicated to explain here.