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TTYS(5) FreeBSD File Formats Manual TTYS(5)


[править] NAME

    ttys — terminal initialization information


    The file ttys contains information that is used by various routines to
    initialize and control the use of terminal special files.  This informa‐
    tion is read with the getttyent(3) library routines.  There is one line
    in the ttys file per special device file.  Fields are separated by tabs
    and/or spaces.  Fields comprised of more than one word should be enclosed
    in double quotes (``").  Blank lines and comments may appear anywhere
    in the file; comments are delimited by hash marks (``#) and new lines.
    Any unspecified fields will default to null.
    The first field is normally the name of the terminal special file as it
    is found in /dev.  However, it can be any arbitrary string when the asso‐
    ciated command is not related to a tty.
    The second field of the file is the command to execute for the line, usu‐
    ally getty(8), which initializes and opens the line, setting the speed,
    waiting for a user name and executing the login(1) program.  It can be,
    however, any desired command, for example the start up for a window sys‐
    tem terminal emulator or some other daemon process, and can contain mul‐
    tiple words if quoted.
    The third field is the type of terminal usually connected to that tty
    line, normally the one found in the termcap(5) data base file.  The envi‐
    ronment variable TERM is initialized with the value by either getty(8) or
    The remaining fields set flags in the ty_status entry (see getttyent(3)),
    specify a window system process that init(8) will maintain for the termi‐
    nal line, optionally determine the type of tty (whether dialin, network
    or otherwise), or specify a tty group name that allows the login class
    database (see login.conf(5)) to refer to many ttys as a group, to selec‐
    tively allow or deny access or enable or disable accounting facilities
    for ttys as a group.
    As flag values, the strings ``on and ``off specify that init(8)
    should (should not) execute the command given in the second field, while
    ``secure (if ``on is also specified) allows users with a uid of 0 to
    login on this line.  The flag ``dialin indicates that a tty entry
    describes a dialin line, and ``network indicates that a tty entry pro‐
    vides a network connection.  Either of these strings may also be speci‐
    fied in the terminal type field.  The string ``window= may be followed
    by a quoted command string which init(8) will execute before starting the
    command specified by the second field.
    The string ``group= may be followed by a group name comprised of
    alphanumeric characters that can be used by login.conf(5) to refer to
    many tty lines as a group to enable or disable access and accounting
    facilities.  If no group is specified, then the tty becomes a member of
    the group "none".  For backwards compatibility, the ``group= should
    appear last on the line, immediately before the optional comment.
    Both the second field and any command specified with ``window= will be
    split into words and executed using execve(2).  Words are separated by
    any combinations of tabs and spaces.  Arguments containing whitespace
    should be enclosed in single quotes (').  Note that no shell-style glob‐
    bing or other variable substitution occurs.

[править] FILES


[править] EXAMPLES

    # root login on console at 1200 baud
    console "/usr/libexec/getty std.1200"   vt100   on secure
    # dialup at 1200 baud, no root logins
    ttyd0   "/usr/libexec/getty d1200"      dialup  on group=dialup # 555-1234
    # Mike's terminal: hp2621
    ttyh0   "/usr/libexec/getty std.9600"   hp2621-nl       on group=dialup # 457 Evans
    # John's terminal: vt100
    ttyh1   "/usr/libexec/getty std.9600"   vt100   on group=dialup         # 459 Evans
    # terminal emulate/window system
    ttyv0   "/usr/local/bin/xterm -display :0"      xterm   on window="/usr/local/bin/X :0"
    # Network pseudo ttys -- don't enable getty
    ttyp0   none    network         group=pty
    ttyp1   none    network off     group=pty

[править] SEE ALSO

login(1), getttyent(3), gettytab(5), login.conf(5), termcap(5), getty(8), init(8)

[править] HISTORY

    A ttys file appeared in Version 6 AT&T UNIX.

FreeBSD 9.0 May 27, 2005 FreeBSD 9.0

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