BSD 4_4 release

[unix-history] / usr / src / usr.bin / look / look.1

diff --git a/usr/src/usr.bin/look/look.1 b/usr/src/usr.bin/look/look.1
index 3582d53..3d8a247 100644 (file)
--- a/usr/src/usr.bin/look/look.1
+++ b/usr/src/usr.bin/look/look.1
@@ -1,47 +1,104 @@
-.\"    @(#)look.1      5.1 (Berkeley) %G%
+.\" Copyright (c) 1990, 1993
+.\"    The Regents of the University of California.  All rights reserved.

 .\"
 .\"

-.TH LOOK 1 "18 January 1983"
-.AT 3
-.SH NAME
-look \- find lines in a sorted list
-.SH SYNOPSIS
-.B look
-[
-.B \-df
-]
-string
-[ file ]
-.SH DESCRIPTION
-.I Look
-consults a sorted
-.I file
-and prints all lines that begin with
-.IR string .
-It uses binary search.
-.PP
-The options 
-.B d
-and
-.B f
-affect comparisons as in
-.IR  sort (1):
-.TP 4
-.B  d
-`Dictionary' order:
-only letters, digits,
-tabs and blanks participate in comparisons.
-.TP 4
-.B  f
-Fold.
-Upper case letters compare equal to lower case.
-.PP
-If no
-.I file
-is specified,
-.I /usr/dict/words
-is assumed with collating sequence
-.B \-df.
-.SH FILES
-/usr/dict/words
-.SH "SEE ALSO"
-sort(1), grep(1)
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"    This product includes software developed by the University of
+.\"    California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)look.1     8.1 (Berkeley) 6/14/93
+.\"
+.Dd June 14, 1993
+.Dt LOOK 1
+.Os
+.Sh NAME
+.Nm look
+.Nd display lines beginning with a given string
+.Sh SYNOPSIS
+.Nm look
+.Op Fl df
+.Op Fl t Ar termchar
+.Ar string
+.Op Ar file
+.Sh DESCRIPTION
+The 
+.Nm look
+utility displays any lines in
+.Ar file
+which contain
+.Ar string
+as a prefix.
+As
+.Nm look
+performs a binary search, the lines in
+.Ar file
+must be sorted.
+.Pp
+If
+.Ar file
+is not specified, the file
+.Pa /usr/share/dict/words
+is used, only alphanumeric characters are compared and the case of
+alphabetic characters is ignored.
+.Pp
+Options:
+.Bl -tag -width Ds
+.It Fl d
+Dictionary character set and order, i.e. only alphanumeric characters
+are compared.
+.It Fl f
+Ignore the case of alphabetic characters.
+.It Fl t
+Specify a string termination character, i.e. only the characters
+in
+.Ar string
+up to and including the first occurrence of
+.Ar termchar
+are compared.
+.El
+.Pp
+The
+.Nm look
+utility exits 0 if one or more lines were found and displayed,
+1 if no lines were found, and >1 if an error occurred.
+.Sh FILES
+.Bl -tag -width /usr/share/dict/words -compact
+.It Pa /usr/share/dict/words
+the dictionary
+.El
+.Sh SEE ALSO
+.Xr grep 1 ,
+.Xr sort 1
+.Sh COMPATIBILITY
+The original manual page stated that tabs and blank characters participated
+in comparisons when the
+.Fl d
+option was specified.
+This was incorrect and the current man page matches the historic
+implementation.
+.Sh HISTORY
+.Nm Look
+appeared in Version 7 AT&T Unix.