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/.