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 *log
name, 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 1.
For success, status is 0, 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).
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