#include <sys/types.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>

int
main()
{
   struct rlimit rl;
   int rc;

   unsigned long s     = 1024*1024*10;  /* 10 Megabytes */
   unsigned long total = 0;

   char *m;
   int   p;
   char *method;

/*
 * Retrieve what we believe our limits to be
 */
   rc = getrlimit(RLIMIT_DATA, &rl);
   if (rc < 0) {
      fprintf(stderr,"getrlimit: %s[%d]\n",strerror(errno),errno);
      exit(1);
   }
   printf("struct rlimit {\n");
   printf("       rlim_t rlim_cur=%qu\n", rl.rlim_cur);
   printf("       rlim_t rlim_max=%qu\n", rl.rlim_max);
   printf("}\n");


/*
 * let's touch alot of memory
 */
#if 1
#define MAPIT(s) mmap(0,s,PROT_READ|PROT_WRITE,MAP_ANON|MAP_NOCORE,-1,0)
   method = "mmap";
   while ((m=MAPIT(s)) != MAP_FAILED) {
#else
   method = "malloc";
   while ((m=malloc(s)) != NULL) {
#endif
      total += s;
      for (p=0; p<s; p+=4096)
         m[p] = 'X';                /* force page allocation */
      fprintf(stderr,"Alloc'd %ld Megabytes\n",total/(1024*1024));
   }
   fprintf(stderr,"%s(): %s[%d]\n",method,strerror(errno),errno);

   return(0);
}