pmopenlog(3) centos man page | unix.com

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)