freebsd-src/usr.bin/tee/tee.1
Warner Losh bdcbfde31e usr.bin: Remove ancient SCCS tags.
Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by:		Netflix
2023-11-26 22:23:30 -07:00

93 lines
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.\" Copyright (c) 1991, 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.
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.\" modification, are permitted provided that the following conditions
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.\" notice, this list of conditions and the following disclaimer.
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.\" notice, this list of conditions and the following disclaimer in the
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.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
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.Dd October 30, 2022
.Dt TEE 1
.Os
.Sh NAME
.Nm tee
.Nd duplicate standard input
.Sh SYNOPSIS
.Nm
.Op Fl ai
.Op Ar
.Sh DESCRIPTION
The
.Nm
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 indent
.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 indent
.It Ar file
A pathname of an output
.Ar file .
.El
.Pp
The
.Nm
utility takes the default action for all signals,
except in the event of the
.Fl i
option.
.Sh EXIT STATUS
.Ex -std
.Sh EXAMPLES
Send the echoed message both to stdout and to the
.Pa greetings.txt
file:
.Bd -literal -offset indent
$ echo "Hello" | tee greetings.txt
Hello
.Ed
.Sh STANDARDS
The
.Nm
utility is expected to be
.St -p1003.2
compatible.
.Sh HISTORY
The
.Nm
command first appeared in
.At v7 .