cd_modem_sig_ind.7

7号信令功能代码,为开源代码

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.TH CD_MODEM_SIG_IND 7 "2004/01/12 23:45:09" "LiS-2_16_18-8" "Linux STREAMS"
.SH NAME
.B CD_MODEM_SIG_IND
\- report modem signals
.SH SYNOPSIS
This primitive consists of one
.B M_PROTO
message block structured as follows:
.sp
.nf
\fC\s-1\
.\"/*
.\" * CD_MODEM_SIG_IND, M_PROTO type
.\" *
.\" * The cd_sigs field reports the current state of the modem signals.
.\" * This message is sent when modem signals change at the hardware
.\" * interface.  Only changes in signals selected by the cd_modem_sig_enb_req_t
.\" * cd_sigs mask will be evaluated for purposes of change detection.
.\" */
typedef struct {
    cd_ulong cd_primitive;
    cd_ulong cd_sigs;
} cd_modem_sig_ind_t;
\fR\s+1
.fi
.SH DESCRIPTION
This provider originated primitives indicates the status of a number of modem
lines and signals.  This primitive is issued in response to a change in modem
signals or in response to a
.BR CD_MODEM_SIG_POLL (7)
primitive.
.SS Parameters
This primitive contains the following parameters:
.TP
.I cd_primitive
Indicates the primitives type.
.TP
.I cd_sigs
Indicates the state of specific modem lines and signals as a bitwise OR of any
of the following flags (when the flag is set, the signal is asserted):
.RS
.TP
.B CD_DTR
Data terminal ready.
.TP
.B CD_RTS
Request to send.
.TP
.B CD_DSR
Data set ready.
.TP
.B CD_DCD
Data carrier detect.
.TP
.B CD_CTS
Clear to send.
.TP
.B CD_RI
Ring indicator.
.RE
.SS State
This primitive can be issued by the CD provider in any state.
.SH FILES
<sys/cdi.h>
.SH "SEE ALSO"
.BR CD_MODEM_SIG_POLL (7),
.BR CD_MODEM_SIG_REQ (7).
.SH VERSIONS
.PP
This manpage was written for
.B LiS\c
.
.[
LiS
.]
.br
The Communications Device Interface first appeared in SVR 4.
.[
svr4
.]
.br
This interface conforms to CDI with Gcom extensions.
.br
.B CD_MODEM_SIG_IND
is a Gcom extension.
.[
$LIST$
.]
.TA