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Интерактивная система просмотра системных руководств (man-ов)

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tty (1)
  • tty (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
  • tty (1) ( FreeBSD man: Команды и прикладные программы пользовательского уровня )
  • tty (1) ( Русские man: Команды и прикладные программы пользовательского уровня )
  • tty (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • >> tty (1) ( POSIX man: Команды и прикладные программы пользовательского уровня )
  • tty (4) ( FreeBSD man: Специальные файлы /dev/* )
  • tty (4) ( Русские man: Специальные файлы /dev/* )
  • tty (4) ( Linux man: Специальные файлы /dev/* )
  • tty (7) ( Solaris man: Макропакеты и соглашения )
  • Ключ tty обнаружен в базе ключевых слов.
  •  

    NAME

    tty - return user's terminal name
     
    

    SYNOPSIS

    tty  

    DESCRIPTION

    The tty utility shall write to the standard output the name of the terminal that is open as standard input. The name that is used shall be equivalent to the string that would be returned by the ttyname() function defined in the System Interfaces volume of IEEE Std 1003.1-2001.  

    OPTIONS

    The tty utility shall conform to the Base Definitions volume of IEEE Std 1003.1-2001, Section 12.2, Utility Syntax Guidelines.  

    OPERANDS

    None.  

    STDIN

    While no input is read from standard input, standard input shall be examined to determine whether or not it is a terminal, and, if so, to determine the name of the terminal.  

    INPUT FILES

    None.  

    ENVIRONMENT VARIABLES

    The following environment variables shall affect the execution of tty:

    LANG
    Provide a default value for the internationalization variables that are unset or null. (See the Base Definitions volume of IEEE Std 1003.1-2001, Section 8.2, Internationalization Variables for the precedence of internationalization variables used to determine the values of locale categories.)
    LC_ALL
    If set to a non-empty string value, override the values of all the other internationalization variables.
    LC_CTYPE
    Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to multi-byte characters in arguments).
    LC_MESSAGES
    Determine the locale that should be used to affect the format and contents of diagnostic messages written to standard error and informative messages written to standard output.
    NLSPATH
    Determine the location of message catalogs for the processing of LC_MESSAGES .

     

    ASYNCHRONOUS EVENTS

    Default.  

    STDOUT

    If standard input is a terminal device, a pathname of the terminal as specified by the ttyname() function defined in the System Interfaces volume of IEEE Std 1003.1-2001 shall be written in the following format:

    
    "%s\n", <terminal name>
    
    

    Otherwise, a message shall be written indicating that standard input is not connected to a terminal. In the POSIX locale, the tty utility shall use the format:

    
    "not a tty\n"
    
    
     

    STDERR

    The standard error shall be used only for diagnostic messages.  

    OUTPUT FILES

    None.  

    EXTENDED DESCRIPTION

    None.  

    EXIT STATUS

    The following exit values shall be returned:

     0
    Standard input is a terminal.
     1
    Standard input is not a terminal.
    >1
    An error occurred.

     

    CONSEQUENCES OF ERRORS

    Default.

    The following sections are informative.  

    APPLICATION USAGE

    This utility checks the status of the file open as standard input against that of an implementation-defined set of files. It is possible that no match can be found, or that the match found need not be the same file as that which was opened for standard input (although they are the same device).  

    EXAMPLES

    None.  

    RATIONALE

    None.  

    FUTURE DIRECTIONS

    None.  

    SEE ALSO

    The System Interfaces volume of IEEE Std 1003.1-2001, isatty(), ttyname()  

    COPYRIGHT

    Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    OPTIONS
    OPERANDS
    STDIN
    INPUT FILES
    ENVIRONMENT VARIABLES
    ASYNCHRONOUS EVENTS
    STDOUT
    STDERR
    OUTPUT FILES
    EXTENDED DESCRIPTION
    EXIT STATUS
    CONSEQUENCES OF ERRORS
    APPLICATION USAGE
    EXAMPLES
    RATIONALE
    FUTURE DIRECTIONS
    SEE ALSO
    COPYRIGHT


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