1.\" Copyright (c) 1980, 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.\" @(#)fold.1 8.1 (Berkeley) 6/6/93 33.\" $FreeBSD$ 34.\" 35.Dd December 15, 2006 36.Dt FOLD 1 37.Os 38.Sh NAME 39.Nm fold 40.Nd "fold long lines for finite width output device" 41.Sh SYNOPSIS 42.Nm 43.Op Fl bs 44.Op Fl w Ar width 45.Op Ar 46.Sh DESCRIPTION 47The 48.Nm 49utility is a filter which folds the contents of the specified files, 50or the standard input if no files are specified, 51breaking the lines to have a maximum of 80 columns. 52.Pp 53The options are as follows: 54.Bl -tag -width indent 55.It Fl b 56Count 57.Ar width 58in bytes rather than column positions. 59.It Fl s 60Fold line after the last blank character within the first 61.Ar width 62column positions (or bytes). 63.It Fl w Ar width 64Specify a line width to use instead of the default 80 columns. 65The 66.Ar width 67value 68should be a multiple of 8 if tabs are present, or the tabs should 69be expanded using 70.Xr expand 1 71before using 72.Nm . 73.El 74.Sh ENVIRONMENT 75The 76.Ev LANG , LC_ALL 77and 78.Ev LC_CTYPE 79environment variables affect the execution of 80.Nm 81as described in 82.Xr environ 7 . 83.Sh SEE ALSO 84.Xr expand 1 , 85.Xr fmt 1 86.Sh STANDARDS 87The 88.Nm 89utility conforms to 90.St -p1003.1-2001 . 91.Sh BUGS 92If underlining (see 93.Xr ul 1 ) 94is present it may be messed up by folding. 95