Sun Microsystems, Inc.
spacerspacer
spacer   www.sun.com docs.sun.com | | |  
spacer
black dot
   
A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z
    
 
User Commandstty(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, allowing 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: 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 attributes:

ATTRIBUTE TYPEATTRIBUTE VALUE
AvailabilitySUNWcsu
CSIenabled

SEE ALSO

 

isatty(3C), ttyname(3C), attributes(5), environ(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 5.9Go To TopLast Changed 1 Feb 1995

 
      
      
Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.