118 lines
3.1 KiB
Groff
118 lines
3.1 KiB
Groff
.\" Copyright (c) 1980, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)fold.1 8.1 (Berkeley) 6/6/93
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.\" $FreeBSD$
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.\"
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.Dd June 6, 2015
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.Dt FOLD 1
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.Os
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.Sh NAME
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.Nm fold
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.Nd "fold long lines for finite width output device"
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.Sh SYNOPSIS
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.Nm
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.Op Fl bs
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.Op Fl w Ar width
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.Op Ar
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.Sh DESCRIPTION
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The
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.Nm
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utility is a filter which folds the contents of the specified files,
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or the standard input if no files are specified,
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breaking the lines to have a maximum of 80 columns.
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.Pp
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The options are as follows:
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.Bl -tag -width indent
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.It Fl b
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Count
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.Ar width
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in bytes rather than column positions.
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.It Fl s
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Fold line after the last blank character within the first
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.Ar width
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column positions (or bytes).
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.It Fl w Ar width
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Specify a line width to use instead of the default 80 columns.
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The
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.Ar width
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value
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should be a multiple of 8 if tabs are present, or the tabs should
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be expanded using
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.Xr expand 1
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before using
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.Nm .
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.El
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.Sh ENVIRONMENT
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The
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.Ev LANG , LC_ALL
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and
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.Ev LC_CTYPE
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environment variables affect the execution of
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.Nm
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as described in
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.Xr environ 7 .
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.Sh SEE ALSO
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.Xr expand 1 ,
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.Xr fmt 1
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.Sh STANDARDS
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The
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.Nm
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utility conforms to
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.St -p1003.1-2001 .
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.Sh HISTORY
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The
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.Nm
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utility first appeared in
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.Bx 1 .
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It was rewritten for
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.Bx 4.3 Reno
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to improve speed and modernize style.
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The
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.Fl b
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and
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.Fl s
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options were added to
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.Nx 1.0
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for
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.St -p1003.2
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compliance.
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.Sh AUTHORS
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.An -nosplit
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.An Bill Joy
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wrote the original version of
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.Nm
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on June 28, 1977.
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.An Kevin Ruddy
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rewrote the command in 1990, and
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.An J. T. Conklin
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added the missing options in 1993.
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.Sh BUGS
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If underlining (see
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.Xr ul 1 )
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is present it may be messed up by folding.
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