Top emulation

/*****
*
*
*Alex Jones 7b PS emulation
**/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <ctype.h>
#include <dirent.h>
#include <sys/wait.h>

DIR *proc;
struct dirent *current;
int Running = 0;
int Sleeping = 0;
typedef struct stats
{
  int PID;
  int PPID;
  int Memsize;
  char State;
  char *Pname;
} PS;

PS List[5000];
int listsize = 0;

void insert (PS input);
void printall();
void printall(){
for(int i = 0 ; i < 10; i++){
printf("%d\n",i);
}
}
void
insert (PS input)
{
  if (listsize == 0)
    {
      List[0] = input;
      listsize++;
      return;
    }
  else
    {
      int i = 0;
      while (i < 5000 && List[i].Memsize > input.Memsize)
	{
	  i++;
	}
      for (int end = listsize; end >= i; end--)
	{
	  List[end] = List[end - 1];
	}
      List[i] = input;
      listsize++;
      return;

    }




}
int
main (void)
{

  proc = opendir ("/proc");

  if (proc == NULL)
    {
      printf ("error in directory open\n");
      exit (1);
    }
  else
    {
      printf (" PID               Name   State   PPID\n");
      while ((current = readdir (proc)) != NULL)
	{
	  if (isdigit (current->d_name[0]))
	    {




	      //printf ("fork\n");
	      //scavenge
	      //printf("%s\n",current -> d_name);
	      char path[100] = "/proc/";
	      int pos = 6;
	      while (current->d_name[pos - 6] != '\0')
		{
		  path[pos] = current->d_name[pos - 6];
		  pos++;
		}
	      path[pos++] = '/';
	      path[pos++] = 's';
	      path[pos++] = 't';
	      path[pos++] = 'a';
	      path[pos++] = 't';
	      path[pos++] = '\0';
	      FILE *stat = fopen (path, "r");
	      printf ("%s\n", path);
	      path[pos] = '\0';
	      path[pos - 1] = 'm';
	      printf ("%s\n", path);
	      FILE *statm = fopen (path, "r");
	      if (stat != NULL)
		{
		  PS output;
		  fscanf (stat, "%d ", &output.PID);
		  //printf ("%5d ", output.PID);        //valid
		  fscanf (stat, "%s ", output.Pname);
		  //printf ("%20s ", output.Pname);
		  fscanf (stat, "%c ", &output.State);
		  //output.State = 'S';
		  //printf ("%c ", output.State);
		  fscanf (stat, "%d ", &output.PPID);
		  //output.PPID = 0;
		  //printf ("%5d \n", output.PPID);
		  //printf("%d %s %c %d\n",output.PID, output.Pname, output.State, output.PPID);
		  insert (output);
		  fclose (statm);
		  fclose (stat);
		}


	    }

	}


    }
  printall();
  
  printf ("Running %d Sleeping %d\n", Running, Sleeping);
  printf ("done\n");
  exit (0);
}