pmdaDaemon initializes the pmdaInterface structure to use the
interface extensions assuming the PMDA(3) is to be run as a daemon.
The pmdaInterface structure is initialized with:
name The name of the agent.
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
-d (see pmdaGetOpt(3)).
logfile The default path to the log file. This may be
replaced by the -l command line option if using
pmdaGetOpt. logfile will be copied with strdup(3), so
the storage associated with logfile may be released
after the call to pmdaDaemon.
helptext The default path to the help text (see pmdaText(3).
This may be replaced by the -h command line option if
using pmdaGetOpt(3). If no help text is installed, or
you are not using pmdaText(3), then this should be set
to NULL, otherwise helptext will be copied with
strdup(3), so the storage associated with helptext may
be released after the call to pmdaDaemon.
The callbacks are initialized to pmdaProfile(3), pmdaFetch(3),
pmdaDesc(3), pmdaText(3), pmdaInstance(3) and pmdaStore(3).
Unable to allocate memory for pmdaExt structure
In addition, the dispatch->status field is set to a
value less than zero.
PMDA interface version interfacenot supported
The interface version is not supported by pmdaDaemon.
The PMDA must be using PMDA_INTERFACE_2 or later.
Once pmdaDaemon has been called, it is expected that the
pmdaInterface structure pointed to by dispatch will remain accessible
to the routines in libpcp_pmda (not reclaimed off the stack, not
freed or oherwise released, etc.). If the caller needs to move or
relocate the pmdaInterface structure for any reason, then after the
move pmdaInterfaceMoved(3) must be called to resestablish the
internal integrity of the pmdaInterface structure at the new location
before any other routine in libpcp_pmda is called.
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at ⟨http://www.pcp.io/⟩.
If you have a bug report for this manual page, send it to
firstname.lastname@example.org. This page was obtained from the project's upstream
Git repository ⟨https://github.com/performancecopilot/pcp.git⟩ on
2020-08-13. (At that time, the date of the most recent commit that
was found in the repository was 2020-08-11.) If you discover any
rendering problems in this HTML version of the page, or you believe
there is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
Performance Co-Pilot PCP PMDADAEMON(3)