1.\" Copyright (c) 1999 Brian Somers <brian@Awfulhak.org> 2.\" 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.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd April 7, 1999 28.Os 29.Dt TRIMDOMAIN 3 30.Sh NAME 31.Nm trimdomain 32.Nd "trim the current domain name from a host name" 33.Sh SYNOPSIS 34.Fd #include <sys/types.h> 35.Fd #include <libutil.h> 36.Ft void 37.Fn trimdomain "char *fullhost" "int hostsize" 38.Pp 39Link with 40.Va -lutil 41on the 42.Xr cc 1 43command line. 44.Sh DESCRIPTION 45The function 46.Fn trimdomain 47removes the current domain name from the passed 48.Ar fullhost 49name by writing a 50.Dv NUL 51character over the first period of the passed name. The current domain 52name is determined by calling 53.Xr gethostname 3 54and removing everything up to the first period. The name is determined 55the first time this function is called and is cached for future use. 56.Pp 57.Fn trimdomain 58will only trim the domain name if the passed 59.Ar fullname 60ends with the current domain name and if the length of the resulting host 61name does not exceed 62.Ar hostsize . 63.Pp 64If the passed 65.Ar fullname 66is actually a 67.Dv DISPLAY 68specification of the form 69.Sm off 70.Ar host No . Ar domain No : Ns 71.Sm on 72.Ar \&nn Oo 73.No . Ns Ar \&nn 74.Oc 75and the domain name is the same as the local domain name, 76.Fn trimdomain 77will remove the embedded domain name, copying the screen and display 78numbers to the end of the base host name and resulting in 79.Ar host No : Ns Ar \&nn Oo 80.No . Ns Ar \&nn 81.Oc . 82.Sh RETURN VALUES 83.Fn trimdomain 84does not return a value. 85.Sh SEE ALSO 86.Xr gethostname 3 87