Adaptec AHA-1520A Manual de Serviço descarregar pdf (Página 72)

connld(7M) STREAMS Modules SunOS 5.5

NAME connld − line disciplinefor unique stream connections

SYNOPSIS /dev/connld

DESCRIPTION connld is a STREAMS-based module that provides unique connections between server

and client processes. It can only be pushed (see streamio(7I)) onto one end of a

STREAMS-based pipe that may subsequentlybe attached to a name in the ﬁle system

name space with fattach(3C). After the pipe end is attached, a new pipe is created inter-

nally when an originating process attempts to open(2) or creat(2) the ﬁle system name. A

ﬁle descriptor for one end of the new pipe is packaged into a message identical to that for

the ioctl I_SENDFD (see streamio(7I)) and is transmitted along the stream to the server

process on the other end. The originating process is blocked until the server responds.

The server responds to theI_SENDFD request by accepting the ﬁle descriptor through the

I_RECVFD ioctl message. When this happens, the ﬁle descriptor associated with the other

end of the new pipe is transmitted to the originating process as the ﬁle descriptor

returned from open(2) or creat(2).

If the server does not respond to theI_SENDFD request, the stream that the connld

module is pushed on becomes uni-directional because the server will not be able to

retrieve any data off the stream until the I_RECVFD request is issued. If the server pro-

cess exits before issuing theI_RECVFD request, the open(2) or the creat(2) invocation will

fail and return -1 to the originatingprocess.

When the connld module is pushed onto a pipe, it ignores messages going back and forth

through the pipe.

ERRORS On success, an open of connld returns 0. On failure, errno is set to the following values:

EINVAL A stream onto which connld is being pushed is not a pipe or the pipe does

not have a write queue pointer pointing to a stream head read queue.

EINVAL The other end of the pipe onto which connld is being pushed is linked

under a multiplexor.

EPIPE connld is being pushed onto a pipe end whose other end is no longer

there.

ENOMEM An internal pipe could not be created.

ENXIO AnM_HANGUP message is at the stream head of the pipe onto which

connld is being pushed.

EAGAIN Internal data structures could not be allocated.

ENFILE A ﬁle table entry could not be allocated.

SEE ALSO creat(2), open(2), fattach(3C), streamio(7I)

STREAMS Programming Guide

7M-68 modiﬁed 3 Jul 1990

1 2 ... 67 68 69 70 71 72 73 74 75 76 77 ... 433 434

Sem comentários

Adaptec AHA-1520A Manual de Serviço Página 72