a6a3e8561d
in grotty(1). This makes it possible to view colorized manpages in color. When MANPAGER environment variable is set, use it instead of PAGER. Why another environment variable, one might ask? With color output enabled, both a terminal and a pager should support the ANSI color escapes. On a supporting terminal, less(1) with option -R would be such a pager, while "more -s" (the current default pager for man(1)) will show garbage. It means a different default pager is needed when color output is enabled, but many people have PAGER set customary, and it's unlikely to support ANSI color escapes, so introducing yet another variable (MANPAGER) seemed like a good option to me: - if MANPAGER is set, use that unconditionally; - if you disable color support (it is by default), and don't set MANPAGER, you get an old behavior: -P pager, $PAGER, "more -s", in that order; - if you enable color support (by setting MANCOLOR), and don't set MANPAGER, we ignore PAGER which is unlikely to support ANSI color escapes, and you get: -P pager, "less -Rs", in that order; - you might have good reasons for different man(1) and general purpose pagers; - later versions of GNU man(1) support MANPAGER.
328 lines
7.1 KiB
Groff
328 lines
7.1 KiB
Groff
.\"-
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.\" Copyright (c) 2010 Gordon Tetlow
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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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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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.\" $FreeBSD$
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.\"
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.Dd June 3, 2011
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.Dt MAN 1
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.Os
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.Sh NAME
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.Nm man
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.Nd display online manual documentation pages
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.Sh SYNOPSIS
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.Nm
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.Op Fl adho
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.Op Fl t | Fl w
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.Op Fl M Ar manpath
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.Op Fl P Ar pager
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.Op Fl S Ar mansect
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.Op Fl m Ar arch Ns Op : Ns Ar machine
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.Op Fl p Op Ar eprtv
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.Op Ar mansect
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.Ar page ...
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.Nm
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.Fl f
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.Ar keyword ...
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.Nm
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.Fl k
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.Ar keyword ...
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.Sh DESCRIPTION
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The
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.Nm
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utility finds and displays online manual documentation pages.
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If
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.Ar mansect
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is provided,
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.Nm
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restricts the search to the specific section of the manual.
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.Pp
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Options that
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.Nm
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understands:
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.Bl -tag -width indent
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.It Fl M Ar manpath
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Forces a specific colon separated manual path instead of the default
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search path.
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See
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.Xr manpath 1 .
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Overrides the
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.Ev MANPATH
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environment variable.
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.It Fl P Ar pager
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Use specified pager.
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Defaults to
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.Ic "less -sR"
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if color support is enabled, or
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.Ic "more -s" .
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Overrides the
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.Ev MANPAGER
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environment variable, which in turn overrides the
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.Ev PAGER
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environment variable.
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.It Fl S Ar mansect
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Restricts manual sections searched to the specified colon delimited list.
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Defaults to
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.Va 1:1aout:8:2:3:n:4:5:6:7:9:l .
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Overrides the
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.Ev MANSECT
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environment variable.
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.It Fl a
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Display all manual pages instead of just the first found for each
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.Ar page
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argument.
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.It Fl d
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Print extra debugging information.
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Repeat for increased verbosity.
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Does not display the manual page.
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.It Fl f
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Emulate
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.Xr whatis 1 .
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.It Fl h
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Display short help message and exit.
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.It Fl k
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Emulate
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.Xr apropos 1 .
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.It Fl m Ar arch Ns Op : Ns Ar machine
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Override the default architecture and machine settings allowing lookup of
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other platform specific manual pages.
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See
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.Sx IMPLEMENTATION NOTES
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for how this option changes the default behavior.
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Overrides the
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.Ev MACHINE_ARCH
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and
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.Ev MACHINE
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environment variables.
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.It Fl o
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Force use of non-localized manual pages.
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See
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.Sx IMPLEMENTATION NOTES
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for how locale specific searches work.
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Overrides the
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.Ev LC_ALL , LC_CTYPE ,
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and
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.Ev LANG
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environment variables.
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.It Fl p Op Ar eprtv
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Use the list of given preprocessors before running
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.Xr nroff 1
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or
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.Xr troff 1 .
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Valid preprocessors arguments:
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.Bl -tag -width indent -compact
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.It Cm e
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.Xr eqn 1
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.It Cm p
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.Xr pic 1
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.It Cm r
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.Xr refer 1
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.It Cm t
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.Xr tbl 1
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.It Cm v
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.Xr vgrind 1
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.El
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Overrides the
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.Ev MANROFFSEQ
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environment variable.
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.It Fl t
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Send manual page source through
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.Xr troff 1
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allowing transformation of the manual pages to other formats.
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.It Fl w
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Display the location of the manual page instead of the contents of
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the manual page.
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.El
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.Sh IMPLEMENTATION NOTES
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.Ss Locale Specific Searches
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The
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.Nm
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utility supports manual pages in different locales.
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The search behavior is dictated by the first of three
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environment variables with a nonempty string:
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.Ev LC_ALL ,
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.Ev LC_CTYPE ,
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or
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.Ev LANG .
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If set,
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.Nm
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will search for locale specific manual pages using the following logic:
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.Bl -item -compact -offset indent
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.Sm off
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.It
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.Va lang _
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.Va country .
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.Va charset
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.It
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.Va lang .
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.Va charset
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.It
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.Li en .
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.Va charset
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.Sm on
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.El
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For example, if
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.Ev LC_ALL
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is set to
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.Va ja_JP.eucJP ,
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.Nm
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will search the following paths when considering section 1 manual pages in
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.Pa /usr/share/man :
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.Bl -item -compact -offset indent
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.It
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.Pa /usr/share/man/ja_JP.eucJP/man1
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.It
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.Pa /usr/share/man/ja.eucJP/man1
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.It
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.Pa /usr/share/man/en.eucJP/man1
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.It
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.Pa /usr/share/man/man1
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.El
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.Ss Platform Specific Searches
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The
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.Nm
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utility supports platform specific manual pages.
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The search behavior is dictated by the
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.Fl m
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option or the
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.Ev MACHINE_ARCH
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and
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.Ev MACHINE
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environment variables.
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For example, if
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.Ev MACHINE_ARCH
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is set to
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.Va i386
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and
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.Ev MACHINE
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is set to
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.Va pc98 ,
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.Nm
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will search the following paths when considering section 4 manual pages in
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.Pa /usr/share/man :
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.Bl -item -compact -offset indent
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.It
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.Pa /usr/share/man/man4/pc98
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.It
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.Pa /usr/share/man/man4/i386
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.It
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.Pa /usr/share/man/man4
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.El
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.Ss Displaying Specific Manual Files
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The
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.Nm
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utility also supports displaying a specific manual page if passed a path
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to the file as long as it contains a
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.Sq /
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character.
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.Sh ENVIRONMENT
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The following environment variables affect the execution of
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.Nm :
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.Bl -tag -width ".Ev MANPATH"
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.It Ev LC_ALL , LC_CTYPE , LANG
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Used to find locale specific manual pages.
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Valid values can be found by running the
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.Xr locale 1
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|
command.
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See
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.Sx IMPLEMENTATION NOTES
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for details.
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Influenced by the
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.Fl o
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option.
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.It Ev MACHINE_ARCH , MACHINE
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Used to find platform specific manual pages.
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If unset, the output of
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.Ic "sysctl hw.machine_arch"
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and
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.Ic "sysctl hw.machine"
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is used respectively.
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See
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.Sx IMPLEMENTATION NOTES
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for details.
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Corresponds to the
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.Fl m
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option.
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.It Ev MANPATH
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|
Used to find the location of the manual files.
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See
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.Xr manpath 1
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for additional information.
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Corresponds to the
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.Fl M
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option.
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.It Ev MANROFFSEQ
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|
Used to determine the preprocessors for the manual source before running
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.Xr nroff 1
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or
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.Xr troff 1 .
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If unset, defaults to
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.Xr tbl 1 .
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Corresponds to the
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.Fl p
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option.
|
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.It Ev MANSECT
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Restricts manual sections searched to the specified colon delimited list.
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Corresponds to the
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.Fl S
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option.
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.It Ev MANWIDTH
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|
If set to a numeric value, used as the width manpages should be displayed.
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Otherwise, if set to a special value
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.Dq Li tty ,
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and output is to a terminal,
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the pages may be displayed over the whole width of the screen.
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.It Ev MANCOLOR
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If set, enables color support.
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.It Ev MANPAGER
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Program used to display files.
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.Pp
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If unset, and color support is enabled,
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.Ic "less -sR"
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is used.
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.Pp
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If unset, and color support is disabled, then
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.Ev PAGER
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is used.
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If that has no value either,
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.Ic "more -s"
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is used.
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.El
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.Sh FILES
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.Bl -tag -width indent -compact
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.It Pa /etc/man.conf
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System configuration file.
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.It Pa /usr/local/etc/man.d/*.conf
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Local configuration files.
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.El
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.Sh SEE ALSO
|
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.Xr intro 1 ,
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.Xr apropos 1 ,
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.Xr locale 1 ,
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.Xr manpath 1 ,
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.Xr man.conf 5 ,
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.Xr nroff 1 ,
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.Xr troff 1 ,
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.Xr whatis 1
|