Re: getloadavg on IRIX

[Bruno Haible]

Trying to use a getloadavg testdir on IRIX 6.5, the test is skipped:

  Skipping test; load average not supported: Not supported
  SKIP: test-getloadavg

The reason is that two things are wrong in the execution of getloadavg:

1) ldav_off is set to the value 542000976 = 0x204E4750
   but "nm /unix | grep avenrun" shows that 'avenrun' is at kernel address
   0xA8000000204E4750. So I think ldav_off should be changed to
   'ptrdiff_t'. This would also match the manual page
   
<http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi?cmd=getdoc&coll=0650&db=man&fname=2%20sysmp>

2) kmem_fd is set to -1. The reason is /dev/kmem is not readable for a
   normal user:

   $ ls -l /dev/kmem
   crw-r-----    1 root     sys         1,  1 Feb  2 03:52 /dev/kmem

   As a consequence, getloadavg_initialized stays 0, and the code

    if (offset == 0 || !getloadavg_initialized)
      {
        errno = ENOTSUP;
        return -1;
      }

   cause getloadavg to fail with ENOTSUP.

   I don't think you need to reintroduce the KMEM_GROUP etc. stuff.
   The few user of IRIX 6.5 systems that have superuser privileges
   can do this by hand.

Bruno