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.\" $FreeBSD: release/9.1.0/usr.bin/man/apropos.1 213317 2010-10-01 03:59:18Z gordon $
.\"
.Dd September 1, 2010
.Dt APROPOS 1
.Os
.Sh NAME
.Nm apropos ,
.Nm whatis
.Nd keyword search whatis documentation databases
.Sh SYNOPSIS
.Nm
.Op Fl d
.Ar keyword ...
.Nm whatis
.Op Fl d
.Ar keyword ...
.Sh DESCRIPTION
The
.Nm
utility searches a set of databases looking for documentation matching each
.Ar keyword
and displays the results.
The
.Nm whatis
utility does the same search but only on complete words.
.Bl -tag -width ".Fl d"
.It Fl d
Print extra debugging information.
.El
.Pp
The
.Ar keyword
is simply passed to
.Xr grep 1
allowing for extended regular expression matches.
.Sh ENVIRONMENT
The following environment variables affect the execution of
.Nm :
.Bl -tag -width ".Ev PAGER"
.It Ev MANLOCALES , MANPATH , PATH
Used to find the location of the
.Nm whatis
database files. See
.Xr manpath 1
for additional information.
.It Ev PAGER
Program used to display files.
If unset,
.Ic "more -s"
is used.
.El
.Sh DIAGNOSTICS
The
.Nm
utility exits 0 if a keyword matched and 1 if no keywords are matched or no
.Nm whatis
databases are found.
.Sh SEE ALSO
.Xr grep 1 ,
.Xr makewhatis 1 ,
.Xr man 1 ,
.Xr manpath 1 ,
.Xr man.conf 5