Is getrusage broken in Linux (2.6.30)

Question

This code

 void print_usage(char * msg)
{
    struct rusage usage;
    getrusage(RUSAGE_SELF, &usage);
    printf(\"Limits: %s\\n\", msg);
    printf(\"         


        

Answer 1

Yes it is partly broken. Not all fields are filled by kernel. http://www.kernel.org/doc/man-pages/online/pages/man2/getrusage.2.html

Working fields:

   ru_utime
   ru_stime
   ru_maxrss (since Linux 2.6.32)
   ru_minflt
   ru_majflt
   ru_inblock (since Linux 2.6.22)
   ru_oublock (since Linux 2.6.22)
   ru_nvcsw (since Linux 2.6)
   ru_nivcsw (since Linux 2.6)

Unused fields:

   ru_ixrss (unmaintained)
   ru_idrss (unmaintained)
   ru_isrss (unmaintained)
   ru_nswap (unmaintained)
   ru_msgsnd (unmaintained)
   ru_msgrcv (unmaintained)
   ru_nsignals (unmaintained)