NAME
fold —
fold long lines for finite width output
device
SYNOPSIS
fold |
[-bs] [-w
width] [file ...] |
DESCRIPTION
Thefold utility is a filter which folds the contents of
the specified files, or the standard input if no files are specified, breaking
the lines to have a maximum of 80 columns.
The options are as follows:
-b- Count width in bytes rather than column positions.
-s- Fold line after the last blank character within the first width column positions (or bytes).
-wwidth- Specify a line width to use instead of the default 80 columns. The
width value should be a multiple of 8 if tabs are
present, or the tabs should be expanded using
expand(1) before using
fold.
ENVIRONMENT
The LANG, LC_ALL
and LC_CTYPE environment variables affect the
execution of fold as described in
environ(7).
SEE ALSO
STANDARDS
The fold utility conforms to
IEEE Std 1003.1-2001 (“POSIX.1”).
HISTORY
The fold utility first appeared in
1BSD. It was rewritten for
4.3BSD-Reno to improve speed and modernize style.
The -b and -s options were
added to NetBSD 1.0 for IEEE Std
1003.2 (“POSIX.2”) compliance.
AUTHORS
Bill Joy wrote the original version of
fold on June 28, 1977. Kevin
Ruddy rewrote the command in 1990, and J. T.
Conklin added the missing options in 1993.
BUGS
If underlining (see ul(1)) is present it may be messed up by folding.