Function assist with iostat

[Pratyush Kshirsagar <pratyush.kshirsagar@xxxxxxxxx>]

Hello,

I am porting the iostat from FreeBSD.

I have problem with the function devstat_compute_statistics()

Here is how its used in FreeBSD ans I tried the compute_stats() in dragonfly but still need this equivalent to be correct

So, please give me the correct usage of compute_stats similar to devstat_compute_statistics in the FreeBSD, here it is:

        if (devstat_compute_statistics(&cur.dinfo->devices[di],
             &last.dinfo->devices[di], busy_seconds,
             DSM_KB_PER_TRANSFER, &kb_per_transfer,
             DSM_TRANSFERS_PER_SECOND, &transfers_per_second,
             DSM_MB_PER_SECOND, &mb_per_second, DSM_NONE) != 0)
                 errx(1, "%s", devstat_errbuf);

Also, is it OK if we call getnumdevs() without any arguments (its similar to freebsd devstat_getdevs()).

The FreeBSD uses:

switch (devstat_getdevs(NULL, &cur)) {
         case -1:
                errx(1, "%s", devstat_errbuf);
                 break;
         case 1:
                 cmdiostat("refresh", NULL);
                 break;
         default:
                 break;
 }

I am still trying to remove some warnings and error. Will mail you if need more help.

pratyush.kshirsagar (@ gmail.com)