gettydefs(4) CLIX gettydefs(4)
NAME
gettydefs - Line speed/terminal settings file
DESCRIPTION
The /etc/gettydefs file contains information used by the getty command 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 pressing <Break>.
Each entry in /etc/gettydefs has the following format:
label# initial-flags # final-flags #login-prompt #next-label
Each entry is followed by a blank line. The various fields can contain
quoted characters of the form \b, \n, \c, and so on, as well as nnn, where
nnn is the octal value of the desired character. The various fields are
as follows:
label The string against which getty tries to match its second
argument. It is often the speed, such as 1200, at which
the terminal is supposed to run, but it need not be (see
below).
initial-flags These flags are the initial ioctl settings to which the
terminal is to be set if a terminal type is not specified
to getty. The flags that getty understands are the same as
the ones listed in /usr/include/sys/termio.h (see
termio(7). Normally only the speed flag is required in the
initial-flags. The getty command 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.
final-flags These flags take the same values as the initial-flags and
are set just before getty executes login. 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 This entire field is displayed as the login-prompt. Unlike
the above fields where white space is ignored (a space, tab
or newline), they are included in the login-prompt field.
next-label If this entry does not specify the desired speed, indicated
by the user pressing <break>, getty will search for the
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gettydefs(4) CLIX gettydefs(4)
entry with next-label as its label field and set up the
terminal for those settings. Usually, a series of speeds
are linked together in a closed set. For example, 2400 is
linked to 1200, which in turn is linked to 300, which
finally is linked to 2400.
If getty is called without a second argument, then the first entry of
gettydefs is used, thus making the first entry of gettydefs the default
entry. It is also used if getty can not find the specified label. If
gettydefs itself is missing, there is one entry built into getty which
will bring up a terminal at 300 baud.
It is strongly recommended that after making or modifying gettydefs, it be
run through getty with the check option to be sure there are no errors.
FILES
/etc/gettydefs
NOTES
Customers who need to support terminals that pass 8 bits to the system (as
is typical outside the U.S.A.) must modify the entries in gettydefs as
described in the CAUTIONS section.
CAUTIONS
8-bit with parity mode is not supported.
To support terminals that pass 8 bits to the system, modify the entries in
the gettydefs file for those terminals as follows: add CS8 to initial-
flags and replace all occurrences of SANE with the values: ``BRKINT IGNPAR
ICRNL IXON OPOST ONCLR CS8 ISIG ICANON ECHO ECHOK''.
An example of changing an entry in /etc/gettydefs is illustrated below.
All of the information for an entry must be on one line in the file.
Original entry:
CONSOLE # B9600 HUPCL OPOST ONLCR # B9600 SANE IXANY TAB3
HUPCL # Console Login: # console
Modified entry:
CONSOLE # B9600 CS8 HUPCL OPOST ONLCR # B9600 BRKINT IGNPAR
ICNRL IXON OPOST ONLCR CS8 ISIG ICANON ECHO ECHOK IXANY
TAB3 HUPCL # Console Login: # console
This change will permit terminals to pass 8 bits to the system so long as
the system is in state. When the system changes to state, the getty
command is killed and the terminal attributes are lost. To permit a
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gettydefs(4) CLIX gettydefs(4)
terminal to pass 8 bits to the system in state after you are in state,
type the following (see stty(1)):
stty -istrip cs8
RELATED INFORMATION
Commands: getty(8), login(1), stty(1)
Files: termio(7)
Functions: ioctl(2)
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