#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>

int vmsize() {
  int pid,fd,size,i,mem;
  char filename[17], buf[256], *ptr, *end;

  pid = getpid();
  snprintf(filename,17,"/proc/%d/stat",pid);
  fd = open(filename,O_RDONLY);
  size = read(fd,buf,240);
  ptr = buf;
  for (i=0;i<22;i++)
    ptr = (char *)strchr(ptr,' ') + 1;
  end = (char *)strchr(ptr,' ');
  *end = 0;
  sscanf(ptr,"%d",&mem);
  close(fd);
  return mem;
}