1.\" Copyright (c) 1983, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" from: @(#)rexec.3 8.1 (Berkeley) 6/4/93 33.\" $NetBSD: rexec.3,v 1.11 2002/10/01 19:04:57 wiz Exp $ 34.\" 35.Dd June 4, 1993 36.Dt REXEC 3 37.Os 38.Sh NAME 39.Nm rexec 40.Nd return stream to a remote command 41.Sh LIBRARY 42.Lb libcompat 43.Sh SYNOPSIS 44.Ft int 45.Fn rexec "char **ahost" "int inport" "char *user" "char *passwd" "char *cmd" "int *fd2p" 46.Sh DESCRIPTION 47.Bf -symbolic 48This interface is obsoleted by 49.Xr rcmd 3 . 50It is available from the compatibility library, libcompat. 51.Ef 52.Pp 53The 54.Fn rexec 55function looks up the host 56.Fa *ahost 57using 58.Xr gethostbyname 3 , 59returning \-1 if the host does not exist. 60Otherwise 61.Fa *ahost 62is set to the standard name of the host. 63If a username and password are both specified, then these 64are used to authenticate to the foreign host; otherwise 65the environment and then the user's 66.Pa .netrc 67file in his home directory are searched for appropriate information. 68If all this fails, the user is prompted for the information. 69.Pp 70The port 71.Fa inport 72specifies which well-known 73.Tn DARPA 74Internet port to use for the connection; the call 75.Ql getservbyname(\\*qexec\\*q, \\*qtcp\\*q) 76(see 77.Xr getservent 3 ) 78will return a pointer to a structure, which contains the 79necessary port. 80The protocol for connection is described in detail in 81.Xr rexecd 8 . 82.Pp 83If the connection succeeds, a socket in the Internet domain of type 84.Dv SOCK_STREAM 85is returned to the caller, and given to the remote command as 86.Em stdin 87and 88.Em stdout . 89If 90.Fa fd2p 91is non-zero, then an auxiliary channel to a control 92process will be setup, and a descriptor for it will be placed 93in 94.Fa *fd2p . 95The control process will return diagnostic 96output from the command (unit 2) on this channel, and will also 97accept bytes on this channel as being 98.Ux 99signal numbers, to be forwarded to the process group of the command. 100The diagnostic information returned does not include remote authorization 101failure, as the secondary connection is set up after authorization has been 102verified. 103If 104.Fa fd2p 105is 0, then the 106.Em stderr 107(unit 2 of the remote command) will be made the same as the 108.Em stdout 109and no 110provision is made for sending arbitrary signals to the remote process, 111although you may be able to get its attention by using out-of-band data. 112.Sh SEE ALSO 113.Xr rcmd 3 , 114.Xr rexecd 8 115.Sh HISTORY 116The 117.Fn rexec 118function appeared in 119.Bx 4.2 . 120