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LDATTACH(8) System Administration LDATTACH(8)
NAME
ldattach - attach a line discipline to a serial line
SYNOPSIS
ldattach [-dhV78neo12] [-s speed] [-i iflag] 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.
-i value | --iflag [-]value{,...}
Sets the specified bits in the c_iflag word of the serial line. Value may be a
number or a symbolic name. If value is prefixed by a minus sign, clear the speci-
fied bits instead. Several comma separated values may be given in order to set and
clear multiple bits.
SEE ALSO
inputattach(1), ttys(4)
AUTHOR
Tilman Schmidt (tilman AT imap.cc)
AVAILABILITY
The ldattach command is part of the util-linux package and is available from
ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
util-linux February 2010 LDATTACH(8)
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