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

.\" Copyright (c) 1990 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" 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	6.6 (Berkeley) 7/21/91
.\"
.Dd July 21, 1991
.Dt LOOK 1
.Os
.Sh NAME
.Nm look
.Nd display lines beginning with a given string
.Sh SYNOPSIS
.Nm look
.Op Fl df
.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.
.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.
Commit	Line	Data
15637ed4 RG	1	.\" Copyright (c) 1990 The Regents of the University of California.
	2	.\" All rights reserved.
	3	.\"
	4	.\" Redistribution and use in source and binary forms, with or without
	5	.\" modification, are permitted provided that the following conditions
	6	.\" are met:
	7	.\" 1. Redistributions of source code must retain the above copyright
	8	.\" notice, this list of conditions and the following disclaimer.
	9	.\" 2. Redistributions in binary form must reproduce the above copyright
	10	.\" notice, this list of conditions and the following disclaimer in the
	11	.\" documentation and/or other materials provided with the distribution.
	12	.\" 3. All advertising materials mentioning features or use of this software
	13	.\" must display the following acknowledgement:
	14	.\" This product includes software developed by the University of
	15	.\" California, Berkeley and its contributors.
	16	.\" 4. Neither the name of the University nor the names of its contributors
	17	.\" may be used to endorse or promote products derived from this software
	18	.\" without specific prior written permission.
	19	.\"
	20	.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	21	.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	22	.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	23	.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	24	.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	25	.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	26	.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	27	.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	28	.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	29	.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	30	.\" SUCH DAMAGE.
	31	.\"
	32	.\" @(#)look.1 6.6 (Berkeley) 7/21/91
	33	.\"
	34	.Dd July 21, 1991
	35	.Dt LOOK 1
	36	.Os
	37	.Sh NAME
	38	.Nm look
	39	.Nd display lines beginning with a given string
	40	.Sh SYNOPSIS
	41	.Nm look
	42	.Op Fl df
	43	.Ar string
	44	.Op Ar file
	45	.Sh DESCRIPTION
	46	The
	47	.Nm look
	48	utility displays any lines in
	49	.Ar file
	50	which contain
	51	.Ar string
	52	as a prefix.
	53	As
	54	.Nm look
	55	performs a binary search, the lines in
	56	.Ar file
	57	must be sorted.
	58	.Pp
	59	If
	60	.Ar file
	61	is not specified, the file
	62	.Pa /usr/share/dict/words
	63	is used, only alphanumeric characters are compared and the case of
	64	alphabetic characters is ignored.
65	.Pp
66	Options:
67	.Bl -tag -width Ds
68	.It Fl d
69	Dictionary character set and order, i.e. only alphanumeric characters
70	are compared.
71	.It Fl f
72	Ignore the case of alphabetic characters.
73	.El
74	.Pp
75	The
76	.Nm look
77	utility exits 0 if one or more lines were found and displayed,
78	1 if no lines were found, and >1 if an error occurred.
79	.Sh FILES
80	.Bl -tag -width /usr/share/dict/words -compact
81	.It Pa /usr/share/dict/words
82	the dictionary
83	.El
84	.Sh SEE ALSO
85	.Xr grep 1 ,
86	.Xr sort 1
87	.Sh COMPATIBILITY
88	The original manual page stated that tabs and blank characters participated
89	in comparisons when the
90	.Fl d
91	option was specified.
92	This was incorrect and the current man page matches the historic
93	implementation.
94	.Sh HISTORY
95	.Nm Look
96	appeared in Version 7 AT&T Unix.