Capabilities are either strings (str), numbers (num), or boolean flags (bool). A string capability is specified by
capability=value; for example, “
dv=/dev/harris”. A numeric capability is specified by
capability#value; for example, “
xa#99”. A boolean capability is specified by simply listing the capability.
at
(str) Auto call unit type.
br
(num) The baud rate used in establishing a connection to the remote host. This is a decimal number. The default baud rate is 300 baud.
cm
(str) An initial connection message to be sent to the remote host. For example, if a host is reached through a port selector, this might be set to the appropriate sequence required to switch to the host.
cu
(str) Call unit if making a phone call. Default is the same as the `dv' field.
dc
(bool) This host is directly connected, and tip should not expect carrier detect to be high, nor should it exit if carrier detect drops.
di
(str) Disconnect message sent to the host when a disconnect is requested by the user.
du
(bool) This host is on a dial-up line.
dv
(str)
UNIX device(s) to open to establish a connection. If this file refers to a terminal line,
tip(1) attempts to perform an exclusive open on the device to ensure only one user at a time has access to the port.
el
(str) Characters marking an end-of-line. The default is
NULL. `~' escapes are only recognized by
tip(1) after one of the characters in `el', or after a carriage-return.
fs
(str) Frame size for transfers. The default frame size is equal to BUFSIZ.
hd
(bool) The host uses half-duplex communication, local echo should be performed.
hf
(bool) Use hardware (RTS/CTS) flow control.
ie
(str) Input end-of-file marks. The default is NULL.
oe
(str) Output end-of-file string. The default is
NULL. When
tip(1) is transferring a file, this string is sent at end-of-file.
pa
(str) The type of parity to use when sending data to the host. This may be one of even, odd, none, zero (always set bit 8 to zero), one (always set bit 8 to one). The default is even parity.
pn
(str) Telephone number(s) for this host. If the telephone number field contains an @ sign,
tip(1) searches the file
/etc/phones file for a list of telephone numbers; see
phones(5).
tc
(str) Indicates that the list of capabilities is continued in the named description. This is used primarily to share common capability information.
Here is a short example showing the use of the capability continuation feature:
UNIX-1200:\
:dv=/dev/cau0:el=^D^U^C^S^Q^O@:du:at=ventel:ie=#$%:oe=^D:br#1200:
arpavax|ax:\
:pn=7654321%:tc=UNIX-1200