ldattach - attach a line discipline to a serial line
ldattach [-1278denoVh] [-i iflag]
[-s speed] ldisc device
The ldattach daemon opens the specified device file
(which should refer to a serial device) and attaches the line discipline
ldisc to it for processing of the sent and/or received data. It then
goes into the background keeping the device open so that the line discipline
stays loaded.
The line discipline ldisc may be specified either by name
or by number.
In order to detach the line discipline, kill(1) the
ldattach process.
With no arguments, ldattach prints usage information.
Depending on the kernel release, the following line disciplines
are supported:
TTY(0)
The default line discipline, providing transparent
operation (raw mode) as well as the habitual terminal line editing
capabilities (cooked mode).
SLIP(1)
Serial Line IP (SLIP) protocol processor for transmitting
TCP/IP packets over serial lines.
MOUSE(2)
Device driver for RS232 connected pointing devices
(serial mice).
PPP(3)
Point to Point Protocol (PPP) processor for transmitting
network packets over serial lines.
STRIP(4); AX25(5);
X25(6)
Line driver for transmitting X.25 packets over
asynchronous serial lines.
6PACK(7); R3964(9)
Driver for Simatic R3964 module.
IRDA(11)
HDLC(13)
Synchronous HDLC driver.
SYNC_PPP(14)
Synchronous PPP driver.
HCI(15)
Bluetooth HCI UART driver.
GIGASET_M101(16)
Driver for Siemens Gigaset M101 serial DECT
adapter.
PPS(18)
Driver for serial line Pulse Per Second (PPS)
source.
GSM0710(21)
Driver for GSM 07.10 multiplexing protocol modem
(CMUX).
-1, --onestopbit
Set the number of stop bits of the serial line to
one.
-2, --twostopbits
Set the number of stop bits of the serial line to
two.
-7, --sevenbits
Set the character size of the serial line to 7
bits.
-8, --eightbits
Set the character size of the serial line to 8
bits.
-d, --debug
Keep ldattach in the foreground so that it can be
interrupted or debugged, and to print verbose messages about its progress to
standard error output.
-e, --evenparity
Set the parity of the serial line to even.
-i, --iflag value...
Set the specified bits in the c_iflag word of the serial
line. The given value may be a number or a symbolic name. If
value is prefixed by a minus sign, the specified bits are cleared
instead. Several comma-separated values may be given in order to set and clear
multiple bits.
-n, --noparity
Set the parity of the serial line to none.
-o, --oddparity
Set the parity of the serial line to odd.
-s, --speed value
Set the speed (the baud rate) of the serial line to the
specified value.
-c, --intro-command string
Define an intro command that is sent through the serial
line before the invocation of ldattach. E.g. in conjunction with line
discipline GSM0710, the command 'AT+CMUX=0\r' is commonly suitable to switch
the modem into the CMUX mode.
-p, --pause value
Sleep for value seconds before the invocation of
ldattach. Default is one second.
-h, --help
Display help text and exit.
-V, --version
Print version and exit.
Tilman Schmidt <tilman@imap.cc>