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File: [XFree86 CVS] / xc / programs / xhost / xhost.man
Revision: 1.4, Sun Oct 4 08:41:18 1998 UTC (14 years, 7 months ago) by dawes
CVS Tags: xf-4_0g, xf-4_0f, xf-4_0e, xf-4_0d, xf-4_0c, xf-4_0b, xf-4_0a, xf-4_0_3b, xf-4_0_3a, xf-4_0_3, xf-4_0_2c, xf-4_0_2b, xf-4_0_2a, xf-4_0_2-branch, xf-4_0_2-bindist, xf-4_0_2, xf-4_0_1h, xf-4_0_1g, xf-4_0_1f, xf-4_0_1e, xf-4_0_1d, xf-4_0_1c, xf-4_0_1b, xf-4_0_1a, xf-4_0_1Zc, xf-4_0_1Zb, xf-4_0_1Za, xf-4_0_1Z, xf-4_0_1-bindist, xf-4_0_1, xf-4_0Z, xf-4_0-bindist, xf-4_0, xf-3_9_18b, xf-3_9_18a, xf-3_9_18Za, xf-3_9_18Z, xf-3_9_18, xf-3_9_17f, xf-3_9_17e, xf-3_9_17d, xf-3_9_17c, xf-3_9_17b, xf-3_9_17a, xf-3_9_17Z, xf-3_9_17, xf-3_9_16f, xf-3_9_16e, xf-3_9_16d, xf-3_9_16c, xf-3_9_16b, xf-3_9_16a, xf-3_9_16Za, xf-3_9_16Z, xf-3_9_16, xf-3_9_15d, xf-3_9_15c, xf-3_9_15b, xf-3_9_15a, xf-3_9_15, xf-3_9Py, xf-3_9Px, xf-3_9Pw, xf-3_9Pv, xf-3_9Pu, xf-3_9Pt, xf-3_9Ps, xf-3_9Pr, xf-3_9Pq, xf-3_9Pp, xf-3_9Po, xf-3_9Pn, xf-3_9Pm, xf-3_9Pl, xf-3_9Pk, xf-3_9Pj, xf-3_9Pi, xf-3_9Phb, xf-3_9Pha, xf-3_9Ph-branch, xf-3_9Ph, xf-3_9Pg, xf-3_9Pf, xf-3_9Pe, xf-3_9Pd, xf-3_9Pc, xf-3_9Pb, xf-3_9Pa, xf-3_9P, xf-3_9Nz, xf-3_9Ny, xf-3_9Nx, xf-3_9Nw, xf-3_9Nva, xf-3_9Nv-branch, xf-3_9Nv, xf-3_9Nu, xf-3_9Nt, xf-3_9Ns, xf-3_9Nr, xf-3_9Nq, xf-3_9Np, xf-3_9No, xf-3_9Nn, xf-3_9Nm, xf-3_9Nl, xf-3_9Nk, xf-3_9Nj, xf-3_9Ni, xf-3_9Nh, pre-R651-import
Changes since 1.3: +7 -13 lines
R6.4 merge for xc/programs
.\" $TOG: xhost.man /main/22 1998/02/09 13:59:06 kaleb $ .\" Copyright 1988, 1998 The Open Group .\" .\" All Rights Reserved. .\" .\" The above copyright notice and this permission notice shall be included .\" in all copies or substantial portions of the Software. .\" .\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS .\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF .\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. .\" IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR .\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, .\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR .\" OTHER DEALINGS IN THE SOFTWARE. .\" .\" Except as contained in this notice, the name of The Open Group shall .\" not be used in advertising or otherwise to promote the sale, use or .\" other dealings in this Software without prior written authorization .\" from The Open Group. .TH XHOST 1 "Release 6.4" "X Version 11" .SH NAME xhost \- server access control program for X .SH SYNOPSIS .B xhost [[+\-]name ...] .SH DESCRIPTION The \fIxhost\fP program is used to add and delete host names or user names to the list allowed to make connections to the X server. In the case of hosts, this provides a rudimentary form of privacy control and security. It is only sufficient for a workstation (single user) environment, although it does limit the worst abuses. Environments which require more sophisticated measures should implement the user-based mechanism or use the hooks in the protocol for passing other authentication data to the server. .SH OPTIONS \fIXhost\fP accepts the following command line options described below. For security, the options that effect access control may only be run from the "controlling host". For workstations, this is the same machine as the server. For X terminals, it is the login host. .TP 8 .B \-help Prints a usage message. .TP 8 .BI "[+]" "name" The given \fIname\fP (the plus sign is optional) is added to the list allowed to connect to the X server. The name can be a host name or a user name. .TP 8 .BI \- "name" The given \fIname\fP is removed from the list of allowed to connect to the server. The name can be a host name or a user name. Existing connections are not broken, but new connection attempts will be denied. Note that the current machine is allowed to be removed; however, further connections (including attempts to add it back) will not be permitted. Resetting the server (thereby breaking all connections) is the only way to allow local connections again. .TP 8 .B \+ Access is granted to everyone, even if they aren't on the list (i.e., access control is turned off). .TP 8 .B \- Access is restricted to only those on the list (i.e., access control is turned on). .TP 8 .I nothing If no command line arguments are given, a message indicating whether or not access control is currently enabled is printed, followed by the list of those allowed to connect. This is the only option that may be used from machines other than the controlling host. .SH NAMES A complete name has the syntax ``family:name'' where the families are as follows: .PP .nf .ta 1i inet Internet host dnet DECnet host nis Secure RPC network name krb Kerberos V5 principal local contains only one name, the empty string .fi .PP The family is case insensitive. The format of the name varies with the family. .PP When Secure RPC is being used, the network independent netname (e.g., "nis:unix.\fIuid\fP@\fIdomainname\fP") can be specified, or a local user can be specified with just the username and a trailing at-sign (e.g., "nis:pat@"). .PP For backward compatibility with pre-R6 \fIxhost\fP, names that contain an at-sign (@) are assumed to be in the nis family. Otherwise the inet family is assumed. .SH DIAGNOSTICS For each name added to the access control list, a line of the form "\fIname\fP being added to access control list" is printed. For each name removed from the access control list, a line of the form "\fIname\fP being removed from access control list" is printed. .SH FILES /etc/X*.hosts .SH "SEE ALSO" X(1), Xsecurity(1), Xserver(1), xdm(1) .SH ENVIRONMENT .TP 8 .B DISPLAY to get the default host and display to use. .SH BUGS .PP You can't specify a display on the command line because .B \-display is a valid command line argument (indicating that you want to remove the machine named .I ``display'' from the access list). .PP The X server stores network addresses, not host names. This is not really a bug. If somehow you change a host's network address while the server is still running, \fIxhost\fP must be used to add the new address and/or remove the old address. .SH AUTHORS Bob Scheifler, MIT Laboratory for Computer Science, .br Jim Gettys, MIT Project Athena (DEC).