pmdaOpenLog(3) — Linux manual page


PMDAOPENLOG(3)            Library Functions Manual            PMDAOPENLOG(3)

NAME         top

       pmdaOpenLog - redirect stderr to a logfile

C SYNOPSIS         top

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

       void pmdaOpenLog(pmdaInterface * dispatch);

       cc ... -lpcp_pmda -lpcp

DESCRIPTION         top

       pmdaOpenLog redirects stderr to the logfile specified in the dispatch
       structure, set by the previous call to pmdaDaemon(3) or
       pmdaGetOpt(3).  The first line of the log file will detail the name
       of the calling process, the host the process is running on, and the
       current time.  In addition, the log is appended with the exit time of
       the process by a routine registered with atexit(3).

CAVEAT         top

       The PMDA must be using PMDA_PROTOCOL_2 or later, as specified in the
       call to pmdaDSO(3) or pmdaDaemon(3).


       Environment variables with the prefix PCP_ are used to parameterize
       the file and directory names used by PCP.  On each installation, the
       file /etc/pcp.conf contains the local values for these variables.
       The $PCP_CONF variable may be used to specify an alternative
       configuration file, as described in pcp.conf(5).  Values for these
       variables may be obtained programmatically using the pmGetConfig(3)

SEE ALSO         top

       pmcd(1), atexit(2), PMAPI(3), PMDA(3), pmdaDaemon(3) and

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, send it to  This page was obtained from the project's upstream
       Git repository ⟨⟩ 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                      PMDAOPENLOG(3)

Pages that refer to this page: pmda(3)PMDA(3)