20d6e5fe6e
of user keys (documentation pending). The only key whose semantics have changed is the capital 'N' key, which now performs a repeat-search in the opposite direction (just like in vi). This commit is a little bulkier than what I had originally planned. I'm not completely happy with the direction it went, but it's definately an improvement, and the alternative is to continue becoming irrelevant compared to GNU less. (Does anyone even _use_ /usr/bin/more these days?)
313 lines
9.6 KiB
Groff
313 lines
9.6 KiB
Groff
.\" Copyright (c) 1988, 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\" 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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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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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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.\" @(#)more.1 8.2 (Berkeley) 4/18/94
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.\" $FreeBSD$
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.\"
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.Dd April 18, 1994
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.Dt MORE 1
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.Os
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.Sh NAME
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.Nm more
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.Nd file perusal filter for crt viewing
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.Sh SYNOPSIS
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.Nm
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.Op Fl ceinsu
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.Op Fl t Ar tag
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.Op Fl x Ar tabs
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.Op Fl / Ar pattern
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.Op Ar
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.Sh DESCRIPTION
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.Nm More
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is a filter for paging through text one screenful at a time. It
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uses
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.Xr termcap 3
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so it can run on a variety of terminals. There is even limited support
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for hardcopy terminals. (On a hardcopy terminal, lines which should be
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printed at the top of the screen are prefixed with an up-arrow.)
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.Ar File
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may be a single dash (``-''), implying stdin.
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.Sh OPTIONS
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Command line options are described below.
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Options are also taken from the environment variable
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.Ev MORE
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(make sure to precede them with a dash (``-'')) but command
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line options will override them.
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.Bl -tag -width flag
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.It Fl c
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Normally,
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.Nm
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will repaint the screen by scrolling from the bottom of the screen.
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If the
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.Fl c
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option is set, when
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.Nm
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needs to change the entire display, it will paint from the top line down.
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.It Fl e
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Normally, if displaying a single file,
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.Nm
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exits as soon as it reaches end-of-file. The
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.Fl e
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option tells
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.Nm
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to
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exit if it reaches end-of-file twice without an intervening operation.
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.It Fl i
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The
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.Fl i
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option causes searches to ignore case; that is,
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uppercase and lowercase are considered identical.
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.It Fl n
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The
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.Fl n
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flag suppresses line numbers.
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The default (to use line numbers) may cause
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.Nm
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to run more slowly in some cases, especially with a very large input file.
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Suppressing line numbers with the
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.Fl n
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flag will avoid this problem.
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Using line numbers means: the line number will be displayed in the
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.Cm =
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command, and the
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.Cm v
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command will pass the current line number to the editor.
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.It Fl s
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The
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.Fl s
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option causes
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consecutive blank lines to be squeezed into a single blank line.
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.It Fl t
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The
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.Fl t
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option, followed immediately by a tag, will edit the file
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containing that tag. For more information, see the
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.Xr ctags 1
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command.
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.It Fl u
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By default,
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.Nm
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treats backspaces and
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.Dv CR-LF
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sequences specially. Backspaces which appear
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adjacent to an underscore character are displayed as underlined text.
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Backspaces which appear between two identical characters are displayed
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as emboldened text.
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.Dv CR-LF
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sequences are compressed to a single newline
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character. The
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.Fl u
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option causes backspaces to always be displayed as
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control characters, i.e. as the two character sequence ``^H'', and
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.Dv CR-LF
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to be left alone.
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.It Fl x
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The
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.Fl x
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option sets tab stops every
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.Ar N
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positions. The default for
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.Ar N
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is 8.
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.It Fl /
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The
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.Fl /
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option specifies a string that will be searched for before
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each file is displayed.
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.Sh COMMANDS
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Interactive commands for
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.Nm
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are based on
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.Xr vi 1 .
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Some commands may be preceded by a decimal number, called N in the
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descriptions below.
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In the following descriptions, ^X means control-X.
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.Pp
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.Bl -tag -width Ic
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.It Ic h
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Help: display a summary of these commands.
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If you forget all the other commands, remember this one.
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.It Xo
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.Ic SPACE
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.No or
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.Ic f
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.No or
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.Ic \&^F
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.Xc
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Scroll forward N lines, default one window.
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If N is more than the screen size, only the final screenful is displayed.
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.It Ic b No or Ic \&^B
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Scroll backward N lines, default one window (see option -z below).
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If N is more than the screen size, only the final screenful is displayed.
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.It Ic j No or Ic RETURN
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Scroll forward N lines, default 1.
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The entire N lines are displayed, even if N is more than the screen size.
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.It Ic k
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Scroll backward N lines, default 1.
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The entire N lines are displayed, even if N is more than the screen size.
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.It Ic d No or Ic \&^D
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Scroll forward N lines, default one half of the screen size.
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If N is specified, it becomes the new default for
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subsequent d and u commands.
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.It Ic u No or Ic \&^U
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Scroll backward N lines, default one half of the screen size.
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If N is specified, it becomes the new default for
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subsequent d and u commands.
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.It Ic g
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Go to line N in the file, default 1 (beginning of file).
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.It Ic G
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Go to line N in the file, default the end of the file.
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.It Ic p No or Ic \&%
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Go to a position N percent into the file. N should be between 0
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and 100. (This works if standard input is being read, but only if
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.Nm
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has already read to the end of the file. It is always fast, but
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not always useful.)
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.It Ic r No or Ic \&^L
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Repaint the screen.
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.It Ic R
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Repaint the screen, discarding any buffered input.
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Useful if the file is changing while it is being viewed.
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.It Ic m
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Followed by any lowercase letter,
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marks the current position with that letter.
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.It Ic \&'
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(Single quote.)
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Followed by any lowercase letter, returns to the position which
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was previously marked with that letter.
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Followed by another single quote, returns to the position at
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which the last "large" movement command was executed, or the
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beginning of the file if no such movements have occurred.
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All marks are lost when a new file is examined.
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.It Ic \&/ Ns Ar pattern
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Search forward in the file for the N-th line containing the pattern.
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N defaults to 1.
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The pattern is a POSIX.2
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.Dq extended format
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regular expression, as described in
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.Xr re_format 7 .
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The search starts at the second line displayed.
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.It Ic \&? Ns Ar pattern
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Search backward in the file for the N-th line containing the pattern.
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The search starts at the line immediately before the top line displayed.
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.It Ic \&/\&! Ns Ar pattern
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Like /, but the search is for the N-th line
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which does NOT contain the pattern.
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.It Ic \&?\&! Ns Ar pattern
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Like ?, but the search is for the N-th line
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which does NOT contain the pattern.
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.It Ic n No and Ic N
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Repeat previous search,
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in same or opposite direction respectively,
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for N-th line containing the last pattern
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(or
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.Tn NOT
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containing the last pattern, if the previous search
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was /! or ?!).
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.It Ic E Ns Op Ar filename
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Examine a new file.
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If the filename is missing, the "current" file (see the N and P commands
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below) from the list of files in the command line is re-examined.
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If the filename is a pound sign (#), the previously examined file is
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re-examined.
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.It Ic \&:n
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Examine the next file (from the list of files given in the command line).
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If a number N is specified (not to be confused with the command N),
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the N-th next file is examined.
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.It Ic \&:p
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Examine the previous file.
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If a number N is specified, the N-th previous file is examined.
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.It Ic \&:t
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Go to supplied tag.
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.It Ic t
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Go forward in tag queue [gtags only].
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.It Ic T
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Go backward in tag queue [gtags only].
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.It Ic v
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Invokes an editor to edit the current file being viewed.
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The editor is taken from the environment variable
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.Ev EDITOR ,
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or defaults to
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.Xr vi 1 .
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.It Ic \&= No or Ic \&^G
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These options print out the number of the file currently being displayed
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relative to the total number of files there are to display, the current
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line number, the current byte number and the total bytes to display, and
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what percentage of the file has been displayed. If
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.Nm
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is reading from stdin, or the file is shorter than a single screen, some
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of these items may not be available. Note, all of these items reference
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the first byte of the last line displayed on the screen.
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.It Xo
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.Ic q
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.No or
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.Ic \&:q
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.No or
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.Ic ZZ
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.Xc
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Exits
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.Nm more .
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.El
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.Sh ENVIRONMENT
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.Nm More
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utilizes the following environment variables, if they exist:
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.Bl -tag -width Fl
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.It Ev MORE
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This variable may be set with favored options to
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.Nm more .
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.It Ev EDITOR
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Specify default editor.
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.It Ev SHELL
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Current shell in use (normally set by the shell at login time).
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.It Ev TERM
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Specifies terminal type, used by more to get the terminal
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characteristics necessary to manipulate the screen.
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.El
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.Sh SEE ALSO
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.Xr ctags 1 ,
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.Xr global 1 ,
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.Xr gtags 1 ,
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.Xr vi 1
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.Sh BUGS
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Reading files with long lines is slow.
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.Pp
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CRLF-terminated 80 character lines are proceeded by an extraneous blank line.
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.Sh AUTHORS
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This software is derived from software contributed to Berkeley
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by
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.An Mark Nudleman .
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.Sh HISTORY
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The
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.Nm
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command appeared in
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.Bx 3.0 .
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