97 lines
2.8 KiB
Groff
97 lines
2.8 KiB
Groff
.\" $NetBSD: head.1,v 1.12 2004/05/04 23:44:21 wiz Exp $
|
|
.\"
|
|
.\" Copyright (c) 1980, 1990, 1993
|
|
.\" 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. 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.
|
|
.\"
|
|
.\" from: @(#)head.1 8.1 (Berkeley) 6/6/93
|
|
.\"
|
|
.Dd May 4, 2004
|
|
.Dt HEAD 1
|
|
.Os
|
|
.Sh NAME
|
|
.Nm head
|
|
.Nd display first lines of a file
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl qv
|
|
.Op Fl n Ar count
|
|
.Op Fl c Ar byte_count
|
|
.Op Ar file ...
|
|
.Sh DESCRIPTION
|
|
This filter displays the first
|
|
.Ar count
|
|
lines of each of the specified files, or of the standard input if no
|
|
files are specified.
|
|
If
|
|
.Ar count
|
|
is omitted it defaults to 10.
|
|
If
|
|
.Fl c Ar byte_count
|
|
is specified,
|
|
.Nm
|
|
counts bytes instead of lines.
|
|
.Pp
|
|
If more than a single file is specified, or the
|
|
.Fl v
|
|
option is used, each file is preceded by a header consisting of the string
|
|
.Dq ==\*[Gt] XXX \*[Le]=
|
|
where
|
|
.Dq XXX
|
|
is the name of the file.
|
|
The
|
|
.Fl q
|
|
flag disables the printing of the header in all cases.
|
|
.Pp
|
|
The
|
|
.Nm
|
|
utility exits 0 on success, and \*[Gt]0 if an error occurs.
|
|
.Sh COMPATIBILITY
|
|
The historic command line syntax of
|
|
.Nm
|
|
is supported by this implementation.
|
|
.Pp
|
|
This command is mostly compatible with GNU extensions to
|
|
.Nm .
|
|
.Sh SEE ALSO
|
|
.Xr tail 1
|
|
.Sh STANDARDS
|
|
The
|
|
.Nm
|
|
utility conforms to
|
|
.St -p1003.2-92 .
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
utility appeared in
|
|
.Bx 3.0 .
|
|
It was enhanced to include the
|
|
.Fl c ,
|
|
.Fl q ,
|
|
and
|
|
.Fl v
|
|
options for
|
|
.Nx 2.1 .
|