NAME


ldattach - attach a line discipline to a serial line

SYNOPSIS


ldattach [ -dhV78neo12 ] [ -s speed ] ldisc device

DESCRIPTION


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.

LINE DISCIPLINES


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)
 Linux IrDa (infrared data transmission) driver - see http://irda.sourceforge.net/
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.

OPTIONS


-d | --debug
 Causes ldattach to stay in the foreground so that it can be interrupted or debugged, and to print verbose messages about its progress to the standard error output.
-h | --help
 Prints a usage message and exits.
-V | --version
 Prints the program version.
-s value | --speed value
 Set the speed of the serial line to the specified value.
-7 | --sevenbits
 Sets the character size of the serial line to 7 bits.
-8 | --eightbits
 Sets the character size of the serial line to 8 bits.
-n | --noparity
 Sets the parity of the serial line to none.
-e | --evenparity
 Sets the parity of the serial line to even.
-o | --oddparity
 Sets the parity of the serial line to odd.
-1 | --onestopbit
 Sets the number of stop bits of the serial line to one.
-2 | --twostopbits
 Sets the number of stop bits of the serial line to two.

SEE ALSO


inputattach(1), ttys(4)

AUTHOR


Tilman Schmidt (tilman@imap.cc)

AVAILABILITY


The ldattach command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.

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