1LDATTACH(8) Linux Programmer's Manual LDATTACH(8)
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6 ldattach - attach a line discipline to a serial line
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9 ldattach [-dhV78neo12] [-s speed] ldisc device
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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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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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75 -d | --debug
76 Causes ldattach to stay in the foreground so that it can be
77 interrupted or debugged, and to print verbose messages about its
78 progress to the standard error output.
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80 -h | --help
81 Prints a usage message and exits.
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83 -V | --version
84 Prints the program version.
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86 -s value | --speed value
87 Set the speed of the serial line to the specified value.
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89 -7 | --sevenbits
90 Sets the character size of the serial line to 7 bits.
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92 -8 | --eightbits
93 Sets the character size of the serial line to 8 bits.
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95 -n | --noparity
96 Sets the parity of the serial line to none.
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98 -e | --evenparity
99 Sets the parity of the serial line to even.
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101 -o | --oddparity
102 Sets the parity of the serial line to odd.
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104 -1 | --onestopbit
105 Sets the number of stop bits of the serial line to one.
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107 -2 | --twostopbits
108 Sets the number of stop bits of the serial line to two.
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111 inputattach(1), ttys(4)
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114 Tilman Schmidt (tilman@imap.cc)
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117 The ldattach command is part of the util-linux-ng package and is avail‐
118 able from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
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122Linux 2.6 14 January 2008 LDATTACH(8)