xref: /freebsd/usr.bin/tty/tty.1 (revision 39beb93c3f8bdbf72a61fda42300b5ebed7390c8)
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35.\"	@(#)tty.1	8.1 (Berkeley) 6/6/93
36.\" $FreeBSD$
37.\"
38.Dd June 6, 1993
39.Dt TTY 1
40.Os
41.Sh NAME
42.Nm tty
43.Nd return user's terminal name
44.Sh SYNOPSIS
45.Nm
46.Op Fl s
47.Sh DESCRIPTION
48The
49.Nm
50utility writes the name of the terminal attached to standard input
51to standard output.
52The name that is written is the string returned by
53.Xr ttyname 3 .
54If the standard input is not a terminal, the message
55.Dq Li "not a tty"
56is written.
57The options are as follows:
58.Bl -tag -width indent
59.It Fl s
60Do not write the terminal name; only the exit status is affected
61when this option is specified.
62The
63.Fl s
64option is deprecated in favor of the
65.Dq Li "test -t 0"
66command.
67.El
68.Sh EXIT STATUS
69The
70.Nm
71utility
72exits 0 if the standard input is a terminal, 1 if the standard input is
73not a terminal, and >1 if an error occurs.
74.Sh SEE ALSO
75.Xr test 1 ,
76.Xr ttyname 3
77.Sh STANDARDS
78The
79.Nm
80utility is expected to be
81.St -p1003.2
82compatible.
83.Sh HISTORY
84A
85.Nm
86command appeared in
87.At v1 .
88