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+.\" Copyright 2008 Tilman Schmidt (tilman@imap.cc)
+.\" May be distributed under the GNU General Public License version 2 or later
+.TH LDATTACH 8 "February 2010" "util-linux" "System Administration"
+.SH NAME
+ldattach \- attach a line discipline to a serial line
+.SH SYNOPSIS
+.B ldattach
+.RB [ \-dhV78neo12 ]
+.RB [ \-s
+.IR speed ]
+.RB [ \-i
+.IR iflag ]
+.I ldisc device
+.SH DESCRIPTION
+The
+.B ldattach
+daemon opens the specified
+.I device
+file
+(which should refer to a serial device)
+and attaches the line discipline
+.I 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
+.I ldisc
+may be specified either by name
+or by number.
+
+In order to detach the line discipline,
+.BR kill (1)
+the
+.B ldattach
+process.
+
+With no arguments,
+.B ldattach
+prints usage information.
+.SH LINE DISCIPLINES
+Depending on the kernel release, the following line disciplines are supported:
+.TP
+.BR TTY ( 0 )
+The default line discipline,
+providing transparent operation (raw mode)
+as well as the habitual terminal line editing capabilities (cooked mode).
+.TP
+.BR SLIP ( 1 )
+Serial Line IP (SLIP) protocol processor
+for transmitting TCP/IP packets over serial lines.
+.TP
+.BR MOUSE ( 2 )
+Device driver for RS232 connected pointing devices (serial mice).
+.TP
+.BR PPP ( 3 )
+Point to Point Protocol (PPP) processor
+for transmitting network packets over serial lines.
+.TP
+.BR STRIP ( 4 )
+.TP
+.BR AX25 ( 5 )
+.TP
+.BR X25 ( 6 )
+Line driver for transmitting X.25 packets over asynchronous serial lines.
+.TP
+.BR 6PACK ( 7 )
+.TP
+.BR R3964 ( 9 )
+Driver for Simatic R3964 module.
+.TP
+.BR IRDA ( 11 )
+Linux IrDa (infrared data transmission) driver -
+see http://irda.sourceforge.net/
+.TP
+.BR HDLC ( 13 )
+Synchronous HDLC driver.
+.TP
+.BR SYNC_PPP ( 14 )
+Synchronous PPP driver.
+.TP
+.BR HCI ( 15 )
+Bluetooth HCI UART driver.
+.TP
+.BR GIGASET_M101 ( 16 )
+Driver for Siemens Gigaset M101 serial DECT adapter.
+.TP
+.BR PPS ( 18 )
+Driver for serial line Pulse Per Second (PPS) source.
+.SH OPTIONS
+.TP
+\fB-d\fP | \fB--debug\fP
+Causes
+.B 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.
+.TP
+\fB-h\fP | \fB--help\fP
+Prints a usage message and exits.
+.TP
+\fB-V\fP | \fB--version\fP
+Prints the program version.
+.TP
+\fB-s\fP \fIvalue\fP | \fB--speed\fP \fIvalue\fP
+Set the speed of the serial line to the specified value.
+.TP
+\fB-7\fP | \fB--sevenbits\fP
+Sets the character size of the serial line to 7 bits.
+.TP
+\fB-8\fP | \fB--eightbits\fP
+Sets the character size of the serial line to 8 bits.
+.TP
+\fB-n\fP | \fB--noparity\fP
+Sets the parity of the serial line to none.
+.TP
+\fB-e\fP | \fB--evenparity\fP
+Sets the parity of the serial line to even.
+.TP
+\fB-o\fP | \fB--oddparity\fP
+Sets the parity of the serial line to odd.
+.TP
+\fB-1\fP | \fB--onestopbit\fP
+Sets the number of stop bits of the serial line to one.
+.TP
+\fB-2\fP | \fB--twostopbits\fP
+Sets the number of stop bits of the serial line to two.
+.TP
+\fB-i\fP \fIvalue\fP | \fB--iflag\fP [\fB-\fP]\fIvalue\fP{,...}
+Sets the specified bits in the c_iflag word of the serial line.
+\fIValue\fP may be a number or a symbolic name.
+If \fIvalue\fP is prefixed by a minus sign, clear the specified bits instead.
+Several comma separated \fIvalue\fPs may be given in order to
+set and clear multiple bits.
+.SH "SEE ALSO"
+.BR inputattach (1),
+.BR ttys (4)
+.SH AUTHOR
+.nf
+Tilman Schmidt (tilman@imap.cc)
+.fi
+.SH AVAILABILITY
+The ldattach command is part of the util-linux package
+and is available from
+ftp://ftp.kernel.org/pub/linux/utils/util-linux/.