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 removed and recreated if possible (to ensure correct ownership  and  per‐
       missions 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)