tirdwr.4.man

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accumulate
move-punctuation
abbreviate A
join-authors ", " ", " " and "
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.\"
.\"
.TH TIRDWR 4 "2004/05/16 02:35:40" "strxnet-0_9_2-4" "Linux Fast-STREAMS Devices"
.\"
.\"
.SH NAME
.B tirdwr
\- a STREAMS TLI read/write module
.\"
.\"
.SH SYNOPSIS
.PP
.B #include <sys/stropts.h>
.br
.B #include <sys/tihdr.h>
.br
.B #include <sys/tirdwr.h>
.HP 8
.BI "int " t " = open(" \fR\*(lq/dev/tcp\*(rq\fP ", " 0 );
.HP 8
.BI "int " retval "= ioctl(" t ", " \fRI_PUSH\fP ", " \fR\*(lqtirdwr\*(rq\fP );
.\"
.\"
.SH DESCRIPTION
.PP
.B tirdwr
is a module that provides
.BR read (2),
.BR readv (2),
.BR write (2)
and
.BR writev (2)
support for streams supporting the Transport Provider Interface
.BR tpi (7).
.[
TPI Revision 2.0.0
.]
.PP
.B tirdwr
performs the following functions:
.IP (1) \w'(000)'u
.IP (2) \w'(000)'u
.IP (3) \w'(000)'u
.IP (4) \w'(000)'u
.IP (5) \w'(000)'u
.IP (6) \w'(000)'u
.IP (7) \w'(000)'u
.\"
.\"
.SH NOTICES
.PP
.\"
.\"
.SH "SEE ALSO"
.PP
.BR read (2),
.BR readv (2),
.BR write (2),
.BR writev (2),
.BR timod (4).
.\"
.\"
.SH BUGS
.PP
.B tirdwr
has no known bugs.
.\"
.\"
.SH COMPATIBILITY
.PP
.B tirdwr
is compatible with
.IR Solaris \(rg,
.IR UnixWare \(rg
and
.BR LiS ,
.[
LiS
.]
with the following exceptions:
.IP \(em \w'\(em\(em'u
An implementation of
.B tirdwr
is provided with the
.B LiS
.[
LiS
.]
package, implemented by Ole Husgaard.
This implementation is buggy.
Ole Husgaard's implementation of
.B tirdwr
for
.B LiS
.[
LiS
.]
has a number of bugs:
.IP \(em
Although
.IR STREAMS (4)
handles packet reads and writes from the stream head using the
.B MSGDELIM
flag,
.B LiS
.[
LiS
.]
.B tirdwr
does not examine or generate
.B MSGDELIM
flags.  This means that
.B LiS
.[
LiS
.]
.B tirdwr
is unsuitable for use with packet-oriented connection-mode transport service
providers such as OSI conforming transport service providers.  (In fact,
.B LiS
.[
LiS
.]
.B tirdwr
doesn't handle expedited data transfer at all.)
.IP \(em
.B LiS
.[
LiS
.]
.B tirdwr
does not handle expedited data transfers correctly.  The correct behavior is to
generate a
.B SIGURG
signal as an
.B M_SIG
message and send it upstread before the
.BR T_EXDATA_IND (7)
converted to an
.BR M_DATA .
This signals the reader that the next read operation will read expedited
data rather than normal data.
.IP \(em
.B LiS
.[
LiS
.]
.B tirdwr
does not handle
.BR T_OPTDATA_IND (7)
messages.
.IP \(em
.B LiS
.[
LiS
.]
.B tirdwr
performs an error on disconnection or orderly release, but does not generate
the proper signals for asynchronous file I/O.
.IP \(em
.B LiS
.[
LiS
.]
.B tirdwr
performs an orderly release when popped and an orderly release is outstanding.
This situation should be dealt with by the TPI driver rather than the
read/write module.  The read/write module should be able to be pushed and
popped from an idle stream in any state without affecting the stream in any
way.
.IP \(em
.I Linux Fast-STREAMS
.[
LfS
.]
.B tirdwr
is not bug for bug compatible with the
.B LiS
implementation.
.\"
.\"
.SH "CONFORMING TO"
.PP
SVID,
.[
svid
.]
XID,
.[
xbd5
.]
XNS5,
.[
xns
.]
SUSv2,
.[
susv2
.]
SUSv3.
.[
susv3
.]
.\"
.\"
.SH HISTORY
.HP 4
A
.B tirdwr
module was provided in
.B SVR 4\c
.
.[
svr4
.]
and is described in the
TPI.
.[
TPI Revision 2.0.0
.]
.\"
.\"
.[
$LIST$
.]
.TI