gettydefs(4)gettydefs(4)NAMEgettydefs - Terminal attributes
SYNOPSIS
/etc/gettydefs
DESCRIPTION
The gettydefs file supplies the getty command with information about
various terminal attributes, such as the default initialization and the
login message. The gettydefs file contains single line entries that are
separated by blank lines. Each entry contains five fields; each field
is separated by a number sign (#). You can indicate comments in the
file by putting a number sign (#) at the beginning of a line.
When the getty command is invoked, it scans the gettydefs file for the
first entry with a matching identifier field (see below). If the getty‐
defs file cannot be opened, internal default settings are used. If a
match is found, then the matching entry is parsed, and the terminal
attributes are set based on the fields specified in the entry. If a
match is not found, the first gettydefs file entry is used; therefore
the first entry in gettydefs must be the default entry. The maximum
length of each entry is 255 characters.
The format of each entry is as follows:
Identifier#Iflag#Fflag#Message#Next Identifier
Identifies an entry. The getty command uses an identifier as an argu‐
ment and searches for the first entry with a matching identifier field.
The identifier must be unique. Specifies the initial terminal flags
that the getty command uses to set the terminal attributes after a line
has been successfully opened. There are four categories for the termi‐
nal attributes. The input flags control the basic input attributes.
The output flags control how the terminal system processes output. The
control flags describe how the hardware controls the terminal. The
local flags control various terminal functions. Refer to termios(4)
for the description of the possible settings on a terminal port. You
can specify the symbol SANE to select default settings. The default
settings set the input flags to BRKINT, IGNPAR, ICRNL and IXON; the
output flags to OPOST and ONLCR; the control flags to CS8, and CREAD;
and the local flags to ISIG, ICANON, IEXTEN, ECHO, ECHOK. Specifies
the final terminal flags used by the getty command. These flags are set
after the getty command receives a valid login name from the standard
input. The output flags and the control flags are set to the terminal
attributes specified in Fflag. The input flags and local flags are
appended to the initial flags specified in the Iflag field. Specifies
the login message. The login message can include the character
sequence %h to obtain the host name and %t to obtain the terminal name.
This field is limited to 79 characters. Specifies that if the speed
specified in the current entry was incorrect, the entry corresponding
to this field should be used. The getty command obtains the new entry
from this field, and the scan process is repeated.
EXAMPLES
The following is an example of an entry in the gettydefs file contain‐
ing settings for an 8 bit, no parity, 9600 baud, locally connected ter‐
minal line:
9600# B9600 HUPCL CS8 CLOCAL # B9600 SANE IXANY TAB3 CLOCAL #login:
#9600
The following is an example of an entry in the gettydefs file contain‐
ing settings for a 8 bit, no parity, 2400 baud, dial in modem line:
M2400# B2400 HUPCL CS8 # B2400 SANE IXANY TAB3 HUPCL #login: #M1200
FILES
Specifies the command that initializes and controls terminal lines.
SEE ALSO
Commands: getty(8)
Functions: kill(2)gettydefs(4)