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 specified 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@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)