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.
.Dd June 6, 1993 .Dt TTY 1 .Os .Sh NAME .Nm tty .Nd return user's terminal name .Sh SYNOPSIS .Nm .Op Fl s .Sh DESCRIPTION The .Nm utility writes the name of the terminal attached to standard input to standard output. The name that is written is the string returned by .Xr ttyname 3 . If the standard input is not a terminal, the message .Dq Li "not a tty" is written. The options are as follows: l -tag -width indent t Fl s Do not write the terminal name; only the exit status is affected when this option is specified. The .Fl s option is deprecated in favor of the .Dq Li "test -t 0" command. .El .Sh EXIT STATUS The .Nm utility exits 0 if the standard input is a terminal, 1 if the standard input is not a terminal, and >1 if an error occurs. .Sh SEE ALSO .Xr test 1 , .Xr ttyname 3 .Sh STANDARDS The .Nm utility is expected to be .St -p1003.2 compatible. .Sh HISTORY A .Nm command appeared in .At v1 .
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.
.Dd June 6, 1993 .Dt TTY 1 .Os .Sh NAME .Nm tty .Nd return user's terminal name .Sh SYNOPSIS .Nm .Op Fl s .Sh DESCRIPTION The .Nm utility writes the name of the terminal attached to standard input to standard output. The name that is written is the string returned by .Xr ttyname 3 . If the standard input is not a terminal, the message .Dq Li "not a tty" is written. The options are as follows: l -tag -width indent t Fl s Do not write the terminal name; only the exit status is affected when this option is specified. The .Fl s option is deprecated in favor of the .Dq Li "test -t 0" command. .El .Sh EXIT STATUS The .Nm utility exits 0 if the standard input is a terminal, 1 if the standard input is not a terminal, and >1 if an error occurs. .Sh SEE ALSO .Xr test 1 , .Xr ttyname 3 .Sh STANDARDS The .Nm utility is expected to be .St -p1003.2 compatible. .Sh HISTORY A .Nm command appeared in .At v1 .