ldattach(8)

1LDATTACH(8)                  System Administration                 LDATTACH(8)
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NAME

6       ldattach - attach a line discipline to a serial line
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SYNOPSIS

9       ldattach [-1278denoVh] [-i iflag] [-s speed] ldisc device
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DESCRIPTION

12       The ldattach daemon opens the specified device file (which should refer
13       to a serial device) and attaches the line discipline ldisc  to  it  for
14       processing  of  the  sent  and/or received data.  It then goes into the
15       background keeping the device open so that the  line  discipline  stays
16       loaded.
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18       The line discipline ldisc may be specified either by name or by number.
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20       In order to detach the line discipline, kill(1) the ldattach process.
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22       With no arguments, ldattach prints usage information.
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LINE DISCIPLINES

25       Depending  on  the  kernel  release, the following line disciplines are
26       supported:
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28       TTY(0) The default line  discipline,  providing  transparent  operation
29              (raw  mode)  as well as the habitual terminal line editing capa‐
30              bilities (cooked mode).
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32       SLIP(1)
33              Serial Line IP (SLIP) protocol processor for transmitting TCP/IP
34              packets over serial lines.
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36       MOUSE(2)
37              Device  driver  for  RS232  connected  pointing  devices (serial
38              mice).
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40       PPP(3) Point to Point Protocol (PPP) processor for transmitting network
41              packets over serial lines.
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43       STRIP(4)
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45       AX25(5)
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47       X25(6) Line  driver  for  transmitting  X.25  packets over asynchronous
48              serial lines.
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50       6PACK(7)
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52       R3964(9)
53              Driver for Simatic R3964 module.
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55       IRDA(11)
56              Linux  IrDa  (infrared   data   transmission)   driver   -   see
57              http://irda.sourceforge.net/
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59       HDLC(13)
60              Synchronous HDLC driver.
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62       SYNC_PPP(14)
63              Synchronous PPP driver.
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65       HCI(15)
66              Bluetooth HCI UART driver.
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68       GIGASET_M101(16)
69              Driver for Siemens Gigaset M101 serial DECT adapter.
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71       PPS(18)
72              Driver for serial line Pulse Per Second (PPS) source.
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74       GSM0710(21)
75              Driver for GSM 07.10 multiplexing protocol modem (CMUX).
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OPTIONS

78       -1, --onestopbit
79              Set the number of stop bits of the serial line to one.
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81       -2, --twostopbits
82              Set the number of stop bits of the serial line to two.
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84       -7, --sevenbits
85              Set the character size of the serial line to 7 bits.
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87       -8, --eightbits
88              Set the character size of the serial line to 8 bits.
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90       -d, --debug
91              Keep ldattach in the foreground so that it can be interrupted or
92              debugged, and to print verbose messages about  its  progress  to
93              standard error output.
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95       -e, --evenparity
96              Set the parity of the serial line to even.
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98       -i, --iflag [-]value...
99              Set  the  specified bits in the c_iflag word of the serial line.
100              The given value may be a number or a symbolic name.  If value is
101              prefixed  by  a  minus  sign,  the  specified  bits  are cleared
102              instead.  Several comma-separated values may be given  in  order
103              to set and clear multiple bits.
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105       -n, --noparity
106              Set the parity of the serial line to none.
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108       -o, --oddparity
109              Set the parity of the serial line to odd.
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111       -s, --speed value
112              Set  the  speed (the baud rate) of the serial line to the speci‐
113              fied value.
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115       -c, --intro-command string
116              Define an intro command that is sent  through  the  serial  line
117              before the invocation of ldattach. E.g. in conjunction with line
118              discipline GSM0710, the command ´AT+CMUX=0\r´ is commonly  suit‐
119              able to switch the modem into the CMUX mode.
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121       -p, --pause value
122              Sleep  for  value  seconds  before  the  invocation of ldattach.
123              Default is one second.
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125       -V, --version
126              Display version information and exit.
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128       -h, --help
129              Display help text and exit.
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AUTHOR

135       Tilman Schmidt (tilman@imap.cc)
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AVAILABILITY

138       The ldattach command is part of the util-linux package and is available
139       from https://www.kernel.org/pub/linux/utils/util-linux/.
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143util-linux                         July 2014                       LDATTACH(8)