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CentOS 7.0 - man page for __pmopenlog (centos section 3)

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PMOPENLOG(3)									     PMOPENLOG(3)

       __pmOpenLog - create a log file for diagnostics and debug output

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

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

       cc ... -lpcp

       __pmOpenLog reassigns the standard I/O stream oldstream to be  associated  with	the  file
       logname.   If it already exists, logname will be removed and recreated if possible (to en-
       sure 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.

       atexit(3) and freopen(3).

Performance Co-Pilot			       PCP				     PMOPENLOG(3)
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