PMOPENLOG(3)              Library Functions Manual              PMOPENLOG(3)

NAME         top

       pmOpenLog - create a log file for diagnostics and debug output

C SYNOPSIS         top

       #include <pcp/pmapi.h>

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

       cc ... -lpcp

DESCRIPTION         top

       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         top

       atexit(3) and freopen(3).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at ⟨http://www.pcp.io/⟩.
       If you have a bug report for this manual page, send it to
       pcp@groups.io.  This page was obtained from the project's upstream
       Git repository ⟨https://github.com/performancecopilot/pcp.git⟩ on
       2018-02-02.  (At that time, the date of the most recent commit that
       was found in the repository was 2018-02-02.)  If you discover any
       rendering problems in this HTML version of the page, or you believe
       there is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

Performance Co-Pilot                 PCP                        PMOPENLOG(3)

Pages that refer to this page: pmnotifyerr(3)

HTML rendering created 2018-02-02 by Michael Kerrisk, author of The Linux Programming Interface, maintainer of the Linux man-pages project. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.