gettydefs(4) DG/UX 4.30 gettydefs(4)
NAME
gettydefs - speed and terminal settings used by getty
DESCRIPTION
The /etc/gettydefs file contains information used by
getty(1m) to set up the speed and terminal settings for a
terminal 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.
NOTE: 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 /etc/gettydefs as described in the
WARNINGS section.
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, etc.,
as well as \nnn, where nnn is the octal value of the desired
character. The various fields are:
label This is 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(2) settings
to which the terminal is to be set if a
terminal type is not specified to getty. The
flags that getty understands are a subset of
those described in termio(7). Refer to this
man page for the meanings of the flags.
These flags are also available via stty(1)).
However, in getty, uppercase flag names are
used. The flags are:
For input modes:
IGNBRK BRKINT IGNPAR PARMRK INPCK ISTRIP INLCR IGNCR ICRNL
IUCLC
IXON IXANY IXOFF
For output modes:
OPOST OLCUC ONLCR OCRNL ONOCR ONLRET OFILL OFDEL
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gettydefs(4) DG/UX 4.30 gettydefs(4)
NL0 NL1 CR0 CR1 CR2 CR3 TAB0 TAB1 TAB2 TAB3 BS0 BS1
VT0 VT1 FF0 FF1
For control modes:
B0 B110 B134 B150 B300 B600 B1200 B1800 B2400 B4800
B9600 B19200 B38400 EXTA EXTB CS5 CS6 CS7 CS8 CSTOPB
CREAD PARENB PARODD HUPCL CLOCAL LOBLK
For line modes:
ISIG ICANON XCASE ECHO ECHOE ECHOK ECHONL NOFLSH
Control characters:
INTR QUIT ERASE KILL EOF EOL EOL2 MIN TIME OBS
When setting control characters, use two words as in: KILL
u Note that you may specify control characters using the
stty format: x for control-x.
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(1).
final-flags
These flags take the same values as the initial-flags
and are set just prior to 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 printed as the login-prompt.
Unlike the above fields where white space is ignored (a
space, tab or new-line), they are included in the
login-prompt field.
next-label
If this entry does not specify the desired speed,
indicated by the user typing a <break> character, then
getty will search for the entry with next-label as its
label field and set up the terminal for those settings.
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gettydefs(4) DG/UX 4.30 gettydefs(4)
Usually, a series of speeds are linked together in this
fashion, into a closed set; For instance, 2400 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 /etc/gettydefs is used, thus making the first entry
of /etc/gettydefs the default entry. It 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.
It is strongly recommended that after making or modifying
/etc/gettydefs, it be run through getty with the check
option to be sure there are no errors.
FILES
/etc/gettydefs
SEE ALSO
ioctl(2).
att_stty(1), getty(1m), termio(7) in the System Manager's
Reference to the DG/UX System.
login(1) in the User's Reference to the DG/UX System.
WARNINGS
To support terminals that pass 8 bits to the system (also,
see the BUGS section), modify the entries in the
/etc/gettydefs file for those terminals as follows: add CS8
to initial-flags, make sure that ISTRIP does not appear in
either the initial-flags or the final-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 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 MULTI-USER state. When
the system changes to SINGLE-USER state, the getty(1M) is
killed and the terminal attributes are lost. So to permit a
terminal to pass 8 bits to the system in SINGLE-USER state,
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gettydefs(4) DG/UX 4.30 gettydefs(4)
after you are in SINGLE-USER state, type (see stty(1)):
stty -istrip cs8
BUGS
getty does not understand berk_stty(1) modes.
8-bit with parity mode is not supported.
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