#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <unistd.h>
#include <sys/types.h>

int main(void)
{
   FILE *p = popen("ls -l","r");
    
   assert(p != NULL);
   char line[200], a[20],b[20],c[20],d[20];
   long int tot = 0, size = 0;
   while (fgets(line,200,p) != NULL) {
      sscanf(line, "%s %s %s %s %ld",
                     a, b, c, d, &size);
      fputs(line, stdout);
      if (a[0] == '-') tot += size;
   }
   printf("Total: %ld\n", tot);
   pclose(p);
}