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. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.Dd December 25, 2013 29.Dt HOSTS.EQUIV 5 30.Os 31.Sh NAME 32.Nm hosts.equiv , 33.Nm .rhosts 34.Nd trusted remote host and user name data base 35.Sh DESCRIPTION 36The 37.Nm 38and 39.Nm .rhosts 40files contain information regarding 41trusted hosts and users on the network. 42For each host a single line should be present 43with the following information: 44.Pp 45simple 46.Bd -unfilled -offset indent 47hostname [username] 48.Ed 49.Pp 50or the more verbose 51.Bd -unfilled -offset indent 52[+-][hostname|@netgroup] [[+-][username|@netgroup]] 53.Ed 54.Pp 55A 56.Dq @ 57indicates a host by netgroup or user by netgroup. 58A single 59.Dq + 60matches all hosts or users. 61A host name with a leading 62.Dq - 63will reject 64all matching hosts and all their users. 65A user name with leading 66.Dq - 67will reject all matching users from matching hosts. 68.Pp 69Items are separated by any number of blanks and/or 70tab characters. 71A 72.Dq # 73indicates the beginning of 74a comment; characters up to the end of the line are 75not interpreted by routines which search the file. 76.Pp 77Host names are specified in the conventional Internet DNS 78dotted-domains 79.Dq .\& 80(dot) notation using the 81.Xr inet_addr 3 82routine 83from the Internet address manipulation library, 84.Xr inet 3 . 85Host names may contain any printable 86character other than a field delimiter, newline, 87or comment character. 88.Pp 89For security reasons, a user's 90.Nm .rhosts 91file will be ignored if it is not a regular file, or if it 92is not owned by the user, or 93if it is writable by anyone other than the user. 94.Sh FILES 95.Bl -tag -width /etc/hosts.equivxxx -compact 96.It Pa /etc/hosts.equiv 97The 98.Nm 99file resides in 100.Pa /etc . 101.It Pa $HOME/.rhosts 102.Nm .rhosts 103file resides in 104.Pa $HOME . 105.El 106.Sh EXAMPLES 107.Dl bar.com foo 108.Pp 109Trust user 110.Dq foo 111from host 112.Dq bar.com . 113.Pp 114.Dl +@allclient 115.Pp 116Trust all hosts from netgroup 117.Dq allclient . 118.Pp 119.Dl +@allclient -@dau 120.Pp 121Trust all hosts from netgroup 122.Dq allclient 123and their users 124except users from netgroup 125.Dq dau . 126.Sh SEE ALSO 127.Xr rcp 1 , 128.Xr gethostbyname 3 , 129.Xr inet 3 , 130.Xr innetgr 3 , 131.Xr ruserok 3 , 132.Xr netgroup 5 , 133.Xr ifconfig 8 , 134.Xr yp 8 135.Sh BUGS 136This manual page is incomplete. 137For more information read 138the source in 139.Pa src/lib/libc/net/rcmd.c 140or the SunOS manual page. 141