GETTYDEFS(F) XENIX System V GETTYDEFS(F)
Name
gettydefs - Speed and terminal settings used by getty.
Description
The /etc/gettydefs file contains information used by
getty(M) to set up the speed and terminal settings for a
line. It supplies information on what the login prompt
should look like. It also supplies the speed to try next if
the user indicates the current speed is not correct by
typing a BREAK character.
Each entry in /etc/gettydefs has the following format:
label# initial-flags # final-flags # login-prompt
#next-label [# login-program]
Each entry is followed by a blank line. The various fields
can contain quoted characters of the form \b, \n, \c, etc.,
as well as \nnn, where nnn is the octal value of the desired
character. The various fields are:
label Identifies the /etc/gettydefs entry to getty.
This could be a letter or number. The label
corresponds to the line mode field in
/etc/ttys. Init passes the line mode as an
argument to getty.
initial-flags Sets the initial ioctl(S) settings if a
terminal type is not specified to getty. The
flags that getty understands are the same as
the ones listed in tty(M). Normally only the
speed flag is required in the initial-flags.
Getty automatically sets the terminal to raw
input mode and takes care of most of the
other flags. The initial-flag settings
remain in effect until getty executes
login(M).
final-flags Sets the same values as the initial-flags.
These flags are set just prior to getty
executing login-program. The speed flag is
again required. The composite flag SANE
takes care of most of the other flags that
need to be set so that the processor and
terminal are communicating in a rational
fashion. The other two commonly specified
final-flags are TAB3, so that tabs are sent
to the terminal as spaces, and HUPCL, so that
the line is hung up on the final close.
login-prompt Contains login prompt message that greets
users. Unlike the above fields where white
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GETTYDEFS(F) XENIX System V GETTYDEFS(F)
space is ignored (a space, tab, or new-line),
it is included in the login-prompt field.
The `@' in the login-prompt field is expanded
to the first line in /etc/systemid (unless
the `@' is preceded by a `\'). Several
character sequences are recognized,
including:
\n Linefeed
\r Carriage return
\v Vertical tab
\nnn (3 octal digits) Specify ASCII character
\t Tab
\f Form feed
\b Backspace
next-label Identifies the next entry in gettydefs for
getty to try if the current one is not
successful. Getty tries the next label if a
user presses the BREAK key while attempting
to log in to the system. Groups of entries,
for example, for dial-up lines or for TTY
lines, should form a closed set so that getty
cycles back to the original entry if none of
the entries is successful. For instance,
2400 linked to 1200, which in turn is linked
to 300, which finally is linked to 2400.
login-program The name of the program that actually logs
the user onto . The default program is
/etc/login. If preceded by the keyword AUTO,
getty will not prompt for a username, but
instead uses its first argument as the
username and executes the login-program
immediately.
If getty is called without a second argument, then the first
entry of /etc/gettydefs is used, thus making the first entry
of /etc/gettydefs the default entry. The first entry is
also used if getty can not find the specified label. If
/etc/gettydefs itself is missing, there is one entry built
into the command which will bring up a terminal at 300 baud.
After modifying /etc/gettydefs, run it through getty with
the check option to be sure there are no errors.
Files
/etc/gettydefs
See Also
ioctl(S), getty(M), login(M)
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