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authorKiyoshi Aman <kiyoshi.aman+adelie@gmail.com>2019-02-01 22:55:37 +0000
committerKiyoshi Aman <kiyoshi.aman+adelie@gmail.com>2019-02-03 18:22:05 -0600
commit5b57d28ffb6e1ef86b50f7d05d977826eae89bfe (patch)
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+.\" $NetBSD: head.1,v 1.14 2017/07/04 06:59:34 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 ==> XXX \*[Le]=
+where
+.Dq XXX
+is the name of the file.
+The
+.Fl q
+flag disables the printing of the header in all cases.
+.Sh EXIT STATUS
+.Ex -std head
+.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 .