108 lines
3.1 KiB
Groff
108 lines
3.1 KiB
Groff
.\" $OpenBSD: echo.1,v 1.24 2018/03/16 16:58:26 schwarze Exp $
|
|
.\" $NetBSD: echo.1,v 1.7 1995/03/21 09:04:26 cgd Exp $
|
|
.\"
|
|
.\" Copyright (c) 1990, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to Berkeley by
|
|
.\" the Institute of Electrical and Electronics Engineers, Inc.
|
|
.\"
|
|
.\" 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.
|
|
.\"
|
|
.\" @(#)echo.1 8.1 (Berkeley) 7/22/93
|
|
.\"
|
|
.Dd $Mdocdate: March 16 2018 $
|
|
.Dt ECHO 1
|
|
.Os
|
|
.Sh NAME
|
|
.Nm echo
|
|
.Nd write arguments to the standard output
|
|
.Sh SYNOPSIS
|
|
.Nm echo
|
|
.Op Fl n
|
|
.Op Ar string ...
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility writes any specified operands, separated by single blank
|
|
.Pq Sq \ \&
|
|
characters and followed by a newline
|
|
.Pq Sq \en
|
|
character, to the standard
|
|
output.
|
|
.Pp
|
|
When no operands are given, only the newline is written.
|
|
The
|
|
.Fl \-
|
|
operand,
|
|
which generally denotes an end to option processing,
|
|
is treated as part of
|
|
.Ar string .
|
|
.Pp
|
|
The options are as follows:
|
|
.Bl -tag -width Ds
|
|
.It Fl n
|
|
Do not print the trailing newline character.
|
|
.El
|
|
.Sh EXIT STATUS
|
|
.Ex -std echo
|
|
.Sh SEE ALSO
|
|
.Xr csh 1 ,
|
|
.Xr ksh 1 ,
|
|
.Xr printf 1
|
|
.Sh STANDARDS
|
|
The
|
|
.Nm
|
|
utility is compliant with the
|
|
.St -p1003.1-2008
|
|
specification.
|
|
.Pp
|
|
The flag
|
|
.Op Fl n
|
|
conflicts with the behaviour mandated by the
|
|
X/Open System Interfaces option of the
|
|
.St -p1003.1-2008
|
|
specification,
|
|
which says it should be treated as part of
|
|
.Ar string .
|
|
Additionally,
|
|
.Nm
|
|
does not support any of the backslash character sequences mandated by XSI.
|
|
.Pp
|
|
.Nm
|
|
also exists as a built-in to
|
|
.Xr csh 1
|
|
and
|
|
.Xr ksh 1 ,
|
|
though with a different syntax.
|
|
.Pp
|
|
Where portability is paramount, use
|
|
.Xr printf 1 .
|
|
.Sh HISTORY
|
|
An
|
|
.Nm
|
|
utility appeared in
|
|
.At v2 .
|