'\"macro stdmacro
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.TH PMDADAEMON 3 "PCP" "Performance Co-Pilot"
.SH NAME
\f3pmdaDaemon\f1 \- initialize the PMDA to run as a daemon
.SH "C SYNOPSIS"
.ft 3
#include <pcp/pmapi.h>
.br
#include <pcp/impl.h>
.br
#include <pcp/pmda.h>
.sp
.ad l
.hy 0
.in +8n
.ti -8n
void pmdaDaemon(pmdaInterface *\fIdispatch\fP, int \fIinterface\fP, char\ *\fIname\fP, int\ \fIdomain\fP, char\ *\fIlogfile\fP, char\ *\fIhelptext\fP);
.sp
.in
.hy
.ad
cc ... \-lpcp_pmda \-lpcp
.ft 1
.SH DESCRIPTION
.B pmdaDaemon
initializes the
.B pmdaInterface
structure to use the
.I interface
extensions assuming the 
.BR PMDA (3)
is to be run as a daemon.  The
.B pmdaInterface
structure is initialized with:
.TP 15
.I name
The name of the agent.
.TP
.I domain
The default domain number of the agent which uniquely identifies this PMDA
from other running PMDAs.  This may be subsequently changed by a command line 
option 
.B \-d
(see 
.BR pmdaGetOpt (3)).
.TP
.I logfile
The default path to the log file.  This may be replaced by the 
.B \-l
command line option if using 
.BR pmdaGetOpt .
.TP
.I helptext
The default path to the help text (see 
.BR pmdaText (3).
This may be replaced by the
.B \-h
command line option if using
.BR pmdaGetOpt (3).
If no help text is installed, or you are not using
.BR pmdaText (3),
then this should be set to NULL.
.PP
The callbacks are initialized to 
.BR pmdaProfile (3),
.BR pmdaFetch (3),
.BR pmdaDesc (3),
.BR pmdaText (3),
.BR pmdaInstance (3)
and
.BR pmdaStore (3).
.SH DIAGNOSTICS
.TP 15
.B Unable to allocate memory for pmdaExt structure
In addition, the 
.I dispatch->status
field is set to a value less than zero.
.TP
.BI "PMDA interface version " interface " not supported"
The
.I interface
version is not supported by 
.BR pmdaDaemon .
.SH CAVEAT
The PMDA must be using
.B PMDA_INTERFACE_2
or later.
.SH SEE ALSO
.BR PMAPI (3),
.BR PMDA (3),
.BR pmdaDSO (3),
.BR pmdaGetOpt (3)
and
.BR pmdaText (3).