NAME
slattach
- attach serial lines as network interfaces
SYNOPSIS
slattach
[-Hhlmn]
[-s baudrate]
[-t ldisc]
ttyname
DESCRIPTION
slattach
is used to assign a tty line to a network interface which uses asynchronous
serial lines.
Currently the
slattach
command is used to attach
sl(4)
or
strip(4)
interfaces.
These interfaces have to be created using the
ifconfig(8)
create
subcommand before the
slattach
command.
The network source and destination addresses and other interface parameters
are configured via
ifconfig(8).
The following operands are supported by
:
- -H
-
Turn on DTR/CTS flow control.
By default, no flow control is done.
- -h
-
Turn on RTS/CTS flow control.
By default, no flow control is done.
- -l
-
Turn on the CLOCAL flag, making it possible to run SLIP on a cable
without modem control signals (e.g. DTR, DSR, DCD).
- -m
-
Maintain modem control signals after closing the line.
Specifically, this disables HUPCL.
- -n
-
Don't detach from invoking tty.
- -s baudrate
-
Specifies the speed of the connection.
If not specified, the default of 9600 is used.
- -t ldisc
-
Specifies the line discipline to use for the tty.
Supported line disciplines are
``slip''
(creates a
sl(4)
instance) and
``strip''
(creates a
strip(4)
instance).
If this option is not specified, the default is
``slip''.
- ttyname
-
Specifies the name of the tty device.
ttyname
should be a string of the form
`ttyXX',
or
`/dev/ttyXX'.
Only the super-user may attach a network interface.
To detach the interface, use
``
ifconfig
interface-name
down
''
after killing off the
slattach
process.
Interface-name
is the name that is shown by
netstat(1).
EXAMPLES
-
slattach ttyh8
slattach -s 4800 /dev/tty01
DIAGNOSTICS
Messages indicating that the specified interface is not configured or created,
the requested address is unknown, or that the user is not privileged
but tried to alter an interface's configuration.
SEE ALSO
netstat(1),
daemon(3),
netintro(4),
sl(4),
strip(4),
ifconfig(8),
rc(8),
sliplogin(8),
slstats(8)
HISTORY
The
slattach
command appeared in
4.3BSD.
BUGS
There is no way to specify the interface name (sl%d etc.) to be attached by the
slattach
command.
There is no way to see which interface is assigned to the specified tty by the
slattach
command, either.
It would be better if the network interfaces were created by the
slattach
command rather than by using the
ifconfig(8)
create
subcommand before the
slattach
command.