apropos

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-.\" 1.0 of the CDDL.
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-.\" Copyright 2012 Nexenta Systems, Inc. All rights reserved.
-.\" Copyright 2014 Garrett D'Amore <garrett@damore.org>
-.\"
-.Dd Jul 18, 2014
+.\"  Copyright (c) 1996, Sun Microsystems, Inc.  All Rights Reserved
+.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
+.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
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+.Dd "Jul 20, 2014"
 .Dt APROPOS 1
 .Os
 .Sh NAME
-.Nm apropos ,
-.Nm whatis
-.Nd keyword search in
-.Nm whatis
-database files
+.Nm apropos, whatis
+.Nd locate commands by keyword lookup
 .Sh SYNOPSIS
-.Nm
+.Nm apropos
 .Op Fl M Ar path
 .Op Fl s Ar section
 .Ar keyword ...
 .Nm whatis
 .Op Fl M Ar path
 .Op Fl s Ar section
 .Ar keyword ...
 .Sh DESCRIPTION
 The
-.Nm
-utility searches a set of
-.Nm whatis
-database files matching each
+.Nm apropos
+utility displays the man page name, section number, and a
+short description for each man page whose
+.Em NAME
+line contains
 .Ar keyword .
+This information is contained in the
+.Nm whatis
+database created by the
+.Fl w
+option used with
+.Xr man 1 .
+If this database is not present,
+.Nm apropos
+and
+.Nm whatis
+fail.
+.Lp
+Each word is considered
+separately and the case of letters is ignored. Words which are part of other
+words are considered; for example, when looking for
+.Sq compile ,
+.Nm apropos
+finds all instances of
+.Sq compiler
+also.
+.Lp
 The
 .Nm whatis
-utility does the same search but only on complete words. The
+command performs the same search, but only matches whole words. In the above
+example,
 .Nm whatis
-database files are created using the
+would not match the instances of
+.Sq compiler
+when
+.Ar keyword
+is
+.Sq compile .
+.Lp
+The
+.Nm apropos
+command is actually just the
+.Fl -k
+option to the
 .Xr man 1
 command.
 .Sh OPTIONS
-.Bl -tag -width ".Fl d"
+.Bl -tag -width "-s section"
 .It Fl M Ar path
-Force a specific colon separated manual path instead of the default search path.
-Overrides the
-.Ev MANPATH
-environment variable.
+Force a specific colon separated manual path instead of the
+default search path.  Overrides the MANPATH environment variable.
 .It Fl s Ar section
-Restrict search to specified
-.Ar section .
+Restrict search to specified section.
 .El
 .Sh ENVIRONMENT
-The following environment variables affect the execution of
-.Nm :
-.Bl -tag -width ".Ev MANPATH , PATH"
+.Bl -tag -width "MANPATH, PATH"
 .It Ev MANPATH , PATH
 Used to find the location of the
 .Nm whatis
-database files.
+database.
 .El
+.Sh FILES
+.Bl -tag -width "/usr/share/man/whatis"
+.It Pa /usr/share/man/whatis
+table of contents and keyword database
+.El
+.Sh EXAMPLES
+.Ss Example 1 To find a man page whose NAME line contains a keyword
+Try
+.Lp
+.Dl example% apropos password
+.Lp
+If the line starts
+.So Ar filename Ns Po Ar section Pc .\|.\|. Sc
+you can run
+.Lp
+.Dl % Nm man Fl s Ar section Ar filename
+.Lp
+to display the man page for \fIfilename\fR.
+.Ss Example 2 To find the man page for the subroutine \fBprintf()
+Try
+.Lp
+.Dl example% Nm apropos Li format
+.Lp
+and then
+.Lp
+.Dl example% Nm man Fl s Ar 3C Li printf
+.Lp
+to get the manual page on the subroutine
+.Xr printf 3C .
 .Sh DIAGNOSTICS
+.Bl -tag -width Ds
+.It "/usr/share/man/whatis: No such file or directory"
 The
-.Nm
-utility exits 0 if a keyword matched and 1 if no keywords are matched or no
 .Nm whatis
-databases are found.
-.Sh INTERFACE STABILITY
-.Nm Committed .
+database does not exist.
+The command
+.Nm man
+.Fl w
+must be run to create it.
+.El
 .Sh CODE SET INDEPENDENCE
 Enabled.
+.Sh INTERFACE STABILITY
+.Nm Committed .
 .Sh SEE ALSO
 .Xr man 1 ,
-.Xr mandoc 1
+.Xr catman 1M