__pmopenlog(3) [centos man page]

PMOPENLOG(3)						     Library Functions Manual						      PMOPENLOG(3)

NAME

       __pmOpenLog - create a log file for diagnostics and debug output

C SYNOPSIS

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

       FILE *__pmOpenLog(const char *progname, const char *logname, FILE *oldstream, int *status);

       cc ... -lpcp

DESCRIPTION

       __pmOpenLog  reassigns the standard I/O stream oldstream to be associated with the file logname.  If it already exists, logname will be re-
       moved and recreated if possible (to ensure correct ownership and permissions from the caller to __pmOpenLog).

       On return, the function value is the new standard I/O stream.  In the event of an error, this will be oldstream unchanged and  status  will
       be 0.

       For success, status is 1, a standard preamble is written to logname
	    Log for progname on hostname started date and time
       and an atexit(3) handler is installed to write the postscript message to logname
	    Log finished date and time
       when the processes exits.

       progname is only used to annotate messages.

SEE ALSO

       atexit(3) and freopen(3).

Performance Co-Pilot							PCP							      PMOPENLOG(3)

PMDAOPENLOG(3)						     Library Functions Manual						    PMDAOPENLOG(3)

NAME

       pmdaOpenLog - redirect stderr to a logfile

C SYNOPSIS

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

       void pmdaOpenLog(pmdaInterface * dispatch);

       cc ... -lpcp_pmda -lpcp

DESCRIPTION

       pmdaOpenLog  redirects  stderr  to  the	logfile  specified in the dispatch structure, set by the previous call to pmdaDaemon(3) or pmdaGe-
       tOpt(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(3C).

CAVEAT

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

PCP ENVIRONMENT

       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	configura-
       tion file, as described in pcp.conf(5).	Values for these variables may be obtained programmatically using the pmGetConfig(3) function.

SEE ALSO

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

Performance Co-Pilot							PCP							    PMDAOPENLOG(3)