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.\" $FreeBSD: src/share/man/man5/hosts.equiv.5,v 1.10.2.6 2002/02/01 15:51:18 ru Exp $ 33.\" $DragonFly: src/share/man/man5/hosts.equiv.5,v 1.2 2003/06/17 04:37:00 dillon Exp $ 34.\" 35.Dd February 11, 1996 36.Dt HOSTS.EQUIV 5 37.Os 38.Sh NAME 39.Nm hosts.equiv , 40.Nm .rhosts 41.Nd trusted remote host and user name data base 42.Sh DESCRIPTION 43The 44.Nm 45and 46.Nm .rhosts 47files contain information regarding 48trusted hosts and users on the network. 49For each host a single line should be present 50with the following information: 51.Pp 52simple 53.Bd -unfilled -offset indent 54hostname [username] 55.Ed 56.Pp 57or the more verbose 58.Bd -unfilled -offset indent 59[+-][hostname|@netgroup] [[+-][username|@netgroup]] 60.Ed 61.Pp 62A 63.Dq @ 64indicates a host by netgroup or user by netgroup. 65A single 66.Dq + 67matches all hosts or users. A host name with a leading 68.Dq - 69will reject 70all matching hosts and all their users. 71A user name with leading 72.Dq - 73will reject all matching users from matching hosts. 74.Pp 75Items are separated by any number of blanks and/or 76tab characters. A 77.Dq # 78indicates the beginning of 79a comment; characters up to the end of the line are 80not interpreted by routines which search the file. 81.Pp 82Host names are specified in the conventional 83.Dq .\& 84(dot) notation using the 85.Xr inet_addr 3 86routine 87from the Internet address manipulation library, 88.Xr inet 3 . 89Host names may contain any printable 90character other than a field delimiter, newline, 91or comment character. 92.Pp 93For security reasons, a user's 94.Nm .rhosts 95file will be ignored if it is not a regular file, or if it 96is not owned by the user, or 97if it is writable by anyone other than the user. 98.Sh EXAMPLES 99.Dl bar.com foo 100.Pp 101Trust user 102.Dq foo 103from host 104.Dq bar.com . 105.Pp 106.Dl +@allclient 107.Pp 108Trust all hosts from netgroup 109.Dq allclient . 110.Pp 111.Dl +@allclient -@dau 112.Pp 113Trust all hosts from netgroup 114.Dq allclient 115and their users 116except users from netgroup 117.Dq dau . 118.Sh FILES 119.Bl -tag -width /etc/hosts.equivxxx -compact 120.It Pa /etc/hosts.equiv 121The 122.Nm 123file resides in 124.Pa /etc . 125.It Pa $HOME/.rhosts 126.Nm .rhosts 127file resides in 128.Pa $HOME . 129.El 130.Sh SEE ALSO 131.Xr rcp 1 , 132.Xr rlogin 1 , 133.Xr rsh 1 , 134.Xr gethostbyname 3 , 135.Xr inet 3 , 136.Xr innetgr 3 , 137.Xr ruserok 3 , 138.Xr ifconfig 8 , 139.Xr named 8 , 140.Xr yp 8 141.Sh BUGS 142This man page is incomplete. 143For more information read 144the source in 145.Pa src/lib/libc/net/rcmd.c 146or the SunOS man page. 147