NAME

       pmOpenLog - create a log file for diagnostics and debug output

C SYNOPSIS

       #include <pcp/pmapi.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 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).