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User Commands tty(1)
NAME
tty - return user's terminal name
SYNOPSIS
tty [-l] [-s]
DESCRIPTION
The tty utility writes to the standard output the name of
the terminal that is open as standard input. The name that
is used is equivalent to the string that would be returned
by the ttyname(3C) function.
OPTIONS
The following options are supported:
-l Prints the synchronous line number to which the
user's terminal is connected, if it is on an active
synchronous line.
-s Inhibits printing of the terminal path name, allow-
ing one to test just the exit status.
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment
variables that affect the execution of tty: LANG, LC_ALL,
LC_CTYPE, LC_MESSAGES, and NLSPATH.
EXIT STATUS
The following exit values are returned:
0 Standard input is a terminal.
1 Standard input is not a terminal.
>1 An error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
SunOS 5.10 Last change: 1 Feb 1995 1
User Commands tty(1)
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWcsu |
|_____________________________|_____________________________|
| CSI | enabled |
|_____________________________|_____________________________|
| Interface Stability | Standard |
|_____________________________|_____________________________|
SEE ALSO
isatty(3C), ttyname(3C), attributes(5), environ(5), stan-
dards(5)
DIAGNOSTICS
not on an active synchronous line
The standard input is not a synchronous terminal and -l
is specified.
not a tty
The standard input is not a terminal and -s is not
specified.
NOTES
The -s option is useful only if the exit status is wanted.
It does not rely on the ability to form a valid path name.
Portable applications should use test -t.
SunOS 5.10 Last change: 1 Feb 1995 2
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This page was generated on Wed Sep 12 21:37:10 GMT 2007
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