инициализировать PMDA для работы в качестве демона (initialize the PMDA to run as a daemon)
Имя (Name)
pmdaDaemon - initialize the PMDA to run as a daemon
Синопсис C (C Synopsis)
#include <pcp/pmapi.h>
#include <pcp/pmda.h>
void pmdaDaemon(pmdaInterface *dispatch, int interface, const
char *name, int domain, const char *logfile, const
char *helptext);
cc ... -lpcp_pmda -lpcp
Описание (Description)
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).
Предостережение (Caveat)
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.
Диагностика (Diagnostic)
Unable to allocate memory for pmdaExt structure
In addition, the dispatch->status field is set to a value
less than zero.
PMDA interface version interface not supported
The interface version is not supported by pmdaDaemon.
Смотри также (See also)
PMAPI(3), PMDA(3), pmdaDSO(3), pmdaGetOpt(3),
pmdaInterfaceMoved(3) and pmdaText(3).
