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pmdadaemon(3)

NAME

   pmdaDaemon - initialize the PMDA to run as a daemon

C SYNOPSIS

   #include <pcp/pmapi.h>
   #include <pcp/impl.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

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.

   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.

   The   callbacks   are   initialized  to  pmdaProfile(3),  pmdaFetch(3),
   pmdaDesc(3), pmdaText(3), pmdaInstance(3) and pmdaStore(3).

DIAGNOSTICS

   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.

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.

SEE ALSO

   PMAPI(3), PMDA(3), pmdaDSO(3), pmdaGetOpt(3), pmdaInterfaceMoved(3) and
   pmdaText(3).



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