usr/src/usr.bin/tee/tee.1

.\" Copyright (c) 1991 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.
.\"
.\" %sccs.include.redist.roff%
.\"
.\"     @(#)tee.1       6.3 (Berkeley) %G%
.\"
.Dd
.Dt TEE 1
.Os BSD 4.4
.Sh NAME
.Nm tee
.Nd pipe fitting
.Sh SYNOPSIS
.Nm tee
.Op Fl ai
.Op Ar file ...
.Sh DESCRIPTION
The
.Nm tee
utility copies standard input to standard output,
making a copy in zero or more files.
The output is unbuffered.
.Pp
The following options are available:
.Bl -tag -width Ds
.It Fl a
Append the output to the files rather than
overwriting them.
.It Fl i
Ignore the
.Dv SIGINT
signal.
.El
.Pp
The following operands are available:
.Bl -tag -width file
.It file
A pathname of an input
.Ar file .
If no file operands
are specified, the standard input is used.
.El
.Pp
The
.Nm tee
utility takes the default action for all signals,
except in the event of the
.Fl i
option.
.Pp
The
.Nm tee
utility exits 0 on success, and >0 if an error occurs.
.Sh STANDARDS
The
.Nm tee
function is expected to be
.Tn POSIX
1003.2 compatible.