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. 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.\" @(#)fold.1 8.1 (Berkeley) 6/6/93 29.\" $FreeBSD: head/usr.bin/fold/fold.1 284058 2015-06-06 12:01:35Z bapt $ 30.\" 31.Dd January 12, 2016 32.Dt FOLD 1 33.Os 34.Sh NAME 35.Nm fold 36.Nd "fold long lines for finite width output device" 37.Sh SYNOPSIS 38.Nm 39.Op Fl bs 40.Op Fl w Ar width 41.Op Ar 42.Sh DESCRIPTION 43The 44.Nm 45utility is a filter which folds the contents of the specified files, 46or the standard input if no files are specified, 47breaking the lines to have a maximum of 80 columns. 48.Pp 49The options are as follows: 50.Bl -tag -width indent 51.It Fl b 52Count 53.Ar width 54in bytes rather than column positions. 55.It Fl s 56Fold line after the last blank character within the first 57.Ar width 58column positions (or bytes). 59.It Fl w Ar width 60Specify a line width to use instead of the default 80 columns. 61The 62.Ar width 63value 64should be a multiple of 8 if tabs are present, or the tabs should 65be expanded using 66.Xr expand 1 67before using 68.Nm . 69.El 70.Sh ENVIRONMENT 71The 72.Ev LANG , LC_ALL 73and 74.Ev LC_CTYPE 75environment variables affect the execution of 76.Nm 77as described in 78.Xr environ 7 . 79.Sh SEE ALSO 80.Xr expand 1 , 81.Xr fmt 1 82.Sh STANDARDS 83The 84.Nm 85utility conforms to 86.St -p1003.1-2001 . 87.Sh HISTORY 88The 89.Nm 90utility first appeared in 91.Bx 1 . 92It was rewritten for 93.Bx 4.3 Reno 94to improve speed and modernize style. 95The 96.Fl b 97and 98.Fl s 99options were added to 100.Nx 1.0 101for 102.St -p1003.2 103compliance. 104.Sh AUTHORS 105.An -nosplit 106.An Bill Joy 107wrote the original version of 108.Nm 109on June 28, 1977. 110.An Kevin Ruddy 111rewrote the command in 1990, and 112.An J. T. Conklin 113added the missing options in 1993. 114.Sh BUGS 115If underlining (see 116.Xr ul 1 ) 117is present it may be messed up by folding. 118