BSD 4_1c_2 development

[unix-history] / usr / src / games / snake / busy.c

/*
* busy: print an indication of how busy the system is for games.
*/
#ifndef MAX
# define MAX 30
#endif

#include <stdio.h>
main(argc, argv)
char **argv;
{
       double la[3];
       double max;

       loadav(la);
       max = la[0];
       if (la[1] > max) max = la[1];
       if (la[2] > max) max = la[2];
       if (argc > 1)
               printf("1=%g, 5=%g, 15=%g, max=%g\n", la[0], la[1], la[2], max);
       if (max > MAX)
               printf("100\n");        /* incredibly high, no games allowed */
       else
               printf("0\n");
       exit(0);
}

#include <sys/types.h>
#include <a.out.h>

struct  nlist nl[] = {
       { "_avenrun" },
       { 0 },
};

loadav(avenrun)
double  *avenrun;
{
       register int i;
       int     kmem;

       if ((kmem = open("/dev/kmem", 0)) < 0) {
               fprintf(stderr, "No kmem\n");
               exit(1);
       }
       nlist("/vmunix", nl);
       if (nl[0].n_type==0) {
               fprintf(stderr, "No namelist\n");
               exit(1);
       }

       lseek(kmem, (long)nl[0].n_value, 0);
       read(kmem, avenrun, 3*sizeof(*avenrun));
}